diff --git a/datahandlers/catalogdb.cpp b/datahandlers/catalogdb.cpp
index ef8187c0a..81c09ccc6 100644
--- a/datahandlers/catalogdb.cpp
+++ b/datahandlers/catalogdb.cpp
@@ -1,984 +1,984 @@
 /***************************************************************************
                catalogDB.cpp  -  K Desktop Planetarium
                             -------------------
    begin                : 2012/03/08
    copyright            : (C) 2012 by Rishab Arora
    email                : ra.rishab@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "catalogdb.h"
 
 #include "catalogdata.h"
 #include "catalogentrydata.h"
 #include "kstars/version.h"
 #include "../kstars/auxiliary/kspaths.h"
 #include "starobject.h"
 #include "deepskyobject.h"
 #include "skycomponent.h"
 
 #include <QSqlTableModel>
 #include <QSqlRecord>
 #include <QSqlQuery>
 
 #include <catalog_debug.h>
 
 bool CatalogDB::Initialize()
 {
     skydb_         = QSqlDatabase::addDatabase("QSQLITE", "skydb");
     QString dbfile = KSPaths::locate(QStandardPaths::GenericDataLocation, QString("skycomponents.sqlite"));
     if (dbfile.isEmpty())
         dbfile = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + QString("skycomponents.sqlite");
 
     QFile testdb(dbfile);
     bool first_run = false;
     if (!testdb.exists())
     {
         qCWarning(KSTARS_CATALOG) << "DSO DB does not exist!";
         first_run = true;
     }
     skydb_.setDatabaseName(dbfile);
     if (!skydb_.open())
     {
         qCWarning(KSTARS_CATALOG) << i18n("Unable to open DSO database file!");
         qCWarning(KSTARS_CATALOG) << LastError();
     }
     else
     {
         qCDebug(KSTARS_CATALOG) << "Opened the DSO Database. Ready!";
         if (first_run == true)
         {
             FirstRun();
         }
     }
     skydb_.close();
     return true;
 }
 
 void CatalogDB::FirstRun()
 {
     qCWarning(KSTARS_CATALOG) << i18n("Rebuilding Additional Sky Catalog Database");
     QVector<QString> tables;
     tables.append("CREATE TABLE Version ("
                   "Version CHAR DEFAULT NULL)");
     tables.append("INSERT INTO Version VALUES (\"" KSTARS_VERSION "\")");
     tables.append("CREATE TABLE ObjectDesignation ("
                   "id INTEGER NOT NULL  DEFAULT NULL PRIMARY KEY,"
                   "id_Catalog INTEGER DEFAULT NULL REFERENCES Catalog (id),"
                   "UID_DSO INTEGER DEFAULT NULL REFERENCES DSO (UID),"
                   "LongName MEDIUMTEXT DEFAULT NULL,"
                   "IDNumber INTEGER DEFAULT NULL,"
                   "Trixel INTEGER NULL)");
     // TODO(kstar):  `Trixel` int(11) NOT NULL COMMENT 'Trixel Number'
     //                  For Future safety
 
     tables.append("CREATE TABLE Catalog ("
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT,"
                   "Name CHAR NOT NULL  DEFAULT 'NULL',"
                   "Prefix CHAR DEFAULT 'NULL',"
                   "Color CHAR DEFAULT '#CC0000',"
                   "Epoch FLOAT DEFAULT 2000.0,"
                   "Author CHAR DEFAULT NULL,"
                   "License MEDIUMTEXT DEFAULT NULL,"
                   "FluxFreq CHAR DEFAULT 'NULL',"
                   "FluxUnit CHAR DEFAULT 'NULL')");
 
     tables.append("CREATE TABLE DSO ("
                   "UID INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT,"
                   "RA DOUBLE NOT NULL  DEFAULT 0.0,"
                   "Dec DOUBLE DEFAULT 0.0,"
                   //"RA CHAR NOT NULL DEFAULT 'NULL',"
                   //"Dec CHAR NOT NULL DEFAULT 'NULL',"
                   "Type INTEGER DEFAULT NULL,"
                   "Magnitude DECIMAL DEFAULT NULL,"
                   "PositionAngle INTEGER DEFAULT NULL,"
                   "MajorAxis FLOAT NOT NULL  DEFAULT NULL,"
                   "MinorAxis FLOAT DEFAULT NULL,"
                   "Flux FLOAT DEFAULT NULL,"
                   "Add1 VARCHAR DEFAULT NULL,"
                   "Add2 INTEGER DEFAULT NULL,"
                   "Add3 INTEGER DEFAULT NULL,"
                   "Add4 INTEGER DEFAULT NULL)");
 
     for (int i = 0; i < tables.count(); ++i)
     {
         QSqlQuery query(skydb_);
         if (!query.exec(tables[i]))
         {
             qCWarning(KSTARS_CATALOG) << query.lastError();
         }
     }
     return;
 }
 
 CatalogDB::~CatalogDB()
 {
     skydb_.close();
 }
 
 QSqlError CatalogDB::LastError()
 {
     // error description is in QSqlError::text()
     return skydb_.lastError();
 }
 
 QStringList *CatalogDB::Catalogs()
 {
     RefreshCatalogList();
     return &catalog_list_;
 }
 
 void CatalogDB::RefreshCatalogList()
 {
     catalog_list_.clear();
     skydb_.open();
-    QSqlTableModel catalog(0, skydb_);
+    QSqlTableModel catalog(nullptr, skydb_);
     catalog.setTable("Catalog");
     catalog.setSort(0, Qt::AscendingOrder);
     catalog.select();
 
     for (int i = 0; i < catalog.rowCount(); ++i)
     {
         QSqlRecord record = catalog.record(i);
         QString name      = record.value("Name").toString();
         catalog_list_.append(name);
         //         QString author = record.value("Author").toString();
         //         QString license = record.value("License").toString();
         //         QString compiled_by = record.value("CompiledBy").toString();
         //         QString prefix = record.value("Prefix").toString();
     }
 
     catalog.clear();
     skydb_.close();
 }
 
 int CatalogDB::FindCatalog(const QString &catalog_name)
 {
     skydb_.open();
-    QSqlTableModel catalog(0, skydb_);
+    QSqlTableModel catalog(nullptr, skydb_);
 
     catalog.setTable("Catalog");
     catalog.setFilter("Name LIKE \'" + catalog_name + "\'");
     catalog.select();
 
     int catalog_count = catalog.rowCount();
     QSqlRecord record = catalog.record(0);
 
     int returnval = -1;
     if (catalog_count > 0)
         returnval = record.value("id").toInt();
 
     catalog.clear();
     skydb_.close();
 
     return returnval;
 }
 
 void CatalogDB::AddCatalog(const CatalogData &catalog_data)
 {
     skydb_.open();
-    QSqlTableModel cat_entry(0, skydb_);
+    QSqlTableModel cat_entry(nullptr, skydb_);
     cat_entry.setTable("Catalog");
 
     int row = 0;
     cat_entry.insertRows(row, 1);
     // row(0) is autoincerement ID
     cat_entry.setData(cat_entry.index(row, 1), catalog_data.catalog_name);
     cat_entry.setData(cat_entry.index(row, 2), catalog_data.prefix);
     cat_entry.setData(cat_entry.index(row, 3), catalog_data.color);
     cat_entry.setData(cat_entry.index(row, 4), catalog_data.epoch);
     cat_entry.setData(cat_entry.index(row, 5), catalog_data.author);
     cat_entry.setData(cat_entry.index(row, 6), catalog_data.license);
     cat_entry.setData(cat_entry.index(row, 7), catalog_data.fluxfreq);
     cat_entry.setData(cat_entry.index(row, 8), catalog_data.fluxunit);
 
     cat_entry.submitAll();
 
     cat_entry.clear();
     skydb_.close();
 }
 
 void CatalogDB::RemoveCatalog(const QString &catalog_name)
 {
     // Part 1 Clear DSO Entries
     ClearDSOEntries(FindCatalog(catalog_name));
 
     skydb_.open();
-    QSqlTableModel catalog(0, skydb_);
+    QSqlTableModel catalog(nullptr, skydb_);
 
     // Part 2 Clear Catalog Table
     catalog.setTable("Catalog");
     catalog.setFilter("Name LIKE \'" + catalog_name + "\'");
     catalog.select();
 
     catalog.removeRows(0, catalog.rowCount());
     catalog.submitAll();
 
     catalog.clear();
     skydb_.close();
 
     RefreshCatalogList();
 }
 
 void CatalogDB::ClearDSOEntries(int catalog_id)
 {
     skydb_.open();
 
     QStringList del_query;
 
     // FIXME(spacetime): Only delete from DSO if removed from all Designations
     // del_query.append("DELETE FROM DSO WHERE UID IN (SELECT UID_DSO FROM "
     //                  "ObjectDesignation WHERE id_Catalog = " +
     //                  QString::number(catalog_id) + ")");
 
     del_query.append("DELETE FROM ObjectDesignation WHERE id_Catalog = " + QString::number(catalog_id));
 
     for (int i = 0; i < del_query.count(); ++i)
     {
         QSqlQuery query(skydb_);
         if (!query.exec(del_query[i]))
         {
             qCWarning(KSTARS_CATALOG) << query.lastError();
         }
     }
 
     skydb_.close();
 }
 
 int CatalogDB::FindFuzzyEntry(const double ra, const double dec, const double magnitude)
 {
     /*
      * FIXME (spacetime): Match the incoming entry with the ones from the db
      * with certain fuzz. If found, store it in rowuid
      * This Fuzz has not been established after due discussion
     */
     //skydb_.open();
-    QSqlTableModel dsoentries(0, skydb_);
+    QSqlTableModel dsoentries(nullptr, skydb_);
 
     QString filter = "((RA - " + QString().setNum(ra) +
                      ") between -0.0016 and 0.0016) and "
                      "((Dec - " +
                      QString().setNum(dec) +
                      ") between -0.0016 and 0.0016) and"
                      "((Magnitude - " +
                      QString().setNum(magnitude) + ") between -0.1 and 0.1)";
     //   qDebug() << filter;
     dsoentries.setTable("DSO");
     dsoentries.setFilter(filter);
     dsoentries.select();
 
     int entry_count   = dsoentries.rowCount();
     QSqlRecord record = dsoentries.record(0);
 
     int returnval = -1;
     if (entry_count > 0)
         returnval = record.value("UID").toInt();
 
     dsoentries.clear();
     //skydb_.close();
     //   qDebug() << returnval;
     return returnval;
 }
 
 bool CatalogDB::AddEntry(const CatalogEntryData &catalog_entry, int catid)
 {
     if (!skydb_.open())
     {
         qCWarning(KSTARS_CATALOG) << "Failed to open database to add catalog entry!";
         qCWarning(KSTARS_CATALOG) << LastError();
         return false;
     }
     bool retVal = _AddEntry(catalog_entry, catid);
     skydb_.close();
     return retVal;
 }
 
 bool CatalogDB::_AddEntry(const CatalogEntryData &catalog_entry, int catid)
 {
     // Verification step
     // If RA, Dec are Null, it denotes an invalid object and should not be written
     if (catid < 0)
     {
         qCWarning(KSTARS_CATALOG) << "Catalog ID " << catid << " is invalid! Cannot add object.";
         return false;
     }
     if (catalog_entry.ra == KSParser::EBROKEN_DOUBLE || catalog_entry.ra == 0.0 || std::isnan(catalog_entry.ra) ||
         catalog_entry.dec == KSParser::EBROKEN_DOUBLE || catalog_entry.dec == 0.0 || std::isnan(catalog_entry.dec))
     {
         qCWarning(KSTARS_CATALOG) << "Attempt to add incorrect ra & dec with ID:" << catalog_entry.ID
                  << " Long Name: " << catalog_entry.long_name;
         return false;
     }
     // Part 1: Adding in DSO table
     // I will not use QSQLTableModel as I need to execute a query to find
     // out the lastInsertId
 
     // Part 2: Fuzzy Match or Create New Entry
     int rowuid = FindFuzzyEntry(catalog_entry.ra, catalog_entry.dec, catalog_entry.magnitude);
     //skydb_.open();
 
     if (rowuid == -1) //i.e. No fuzzy match found. Proceed to add new entry
     {
         QSqlQuery add_query(skydb_);
         add_query.prepare("INSERT INTO DSO (RA, Dec, Type, Magnitude, PositionAngle,"
                           " MajorAxis, MinorAxis, Flux) VALUES (:RA, :Dec, :Type,"
                           " :Magnitude, :PositionAngle, :MajorAxis, :MinorAxis,"
                           " :Flux)");
         add_query.bindValue(":RA", catalog_entry.ra);
         add_query.bindValue(":Dec", catalog_entry.dec);
         add_query.bindValue(":Type", catalog_entry.type);
         add_query.bindValue(":Magnitude", catalog_entry.magnitude);
         add_query.bindValue(":PositionAngle", catalog_entry.position_angle);
         add_query.bindValue(":MajorAxis", catalog_entry.major_axis);
         add_query.bindValue(":MinorAxis", catalog_entry.minor_axis);
         add_query.bindValue(":Flux", catalog_entry.flux);
         if (!add_query.exec())
         {
             qCWarning(KSTARS_CATALOG) << "Custom Catalog Insert Query FAILED!";
             qCWarning(KSTARS_CATALOG) << add_query.lastQuery();
             qCWarning(KSTARS_CATALOG) << add_query.lastError();
         }
 
         // Find UID of the Row just added
         rowuid = add_query.lastInsertId().toInt();
         add_query.clear();
     }
     int ID = catalog_entry.ID;
 
     /* TODO(spacetime)
      * Possible Bugs in QSQL Db with SQLite
      * 1) Unless the db is closed and opened again, the next queries
      *    fail.
      * 2) unless I clear the resources, db close fails. The doc says
      *    this is to be rarely used.
      */
 
     // Find ID of catalog
     //skydb_.close();
     //catid = FindCatalog(catalog_entry.catalog_name);
 
     // Part 3: Add in Object Designation
     //skydb_.open();
     QSqlQuery add_od(skydb_);
     if (ID >= 0)
     {
         add_od.prepare("INSERT INTO ObjectDesignation (id_Catalog, UID_DSO, LongName"
                        ", IDNumber) VALUES (:catid, :rowuid, :longname, :id)");
         add_od.bindValue(":id", ID);
     }
     else
     {
         //qWarning() << "FIXME: This query has not been tested!!!!";
         add_od.prepare("INSERT INTO ObjectDesignation (id_Catalog, UID_DSO, LongName"
                        ", IDNumber) VALUES (:catid, :rowuid, :longname,"
                        "(SELECT MAX(ISNULL(IDNumber,1))+1 FROM ObjectDesignation WHERE id_Catalog = :catid) )");
     }
     add_od.bindValue(":catid", catid);
     add_od.bindValue(":rowuid", rowuid);
     add_od.bindValue(":longname", catalog_entry.long_name);
     bool retVal = true;
     if (!add_od.exec())
     {
         qWarning() << "Query exec failed:";
         qWarning() << add_od.lastQuery();
         qWarning() << skydb_.lastError();
         retVal = false;
     }
     add_od.clear();
     //skydb_.close();
 
     return retVal;
 }
 
 QString CatalogDB::GetCatalogName(const QString &fname)
 {
     QDir::setCurrent(QDir::homePath()); // for files with relative path
     QString filename = fname;
     // If the filename begins with "~", replace the "~" with the user's home
     // directory (otherwise, the file will not successfully open)
     if (filename.at(0) == '~')
         filename = QDir::homePath() + filename.mid(1, filename.length());
 
     QFile ccFile(filename);
 
     if (ccFile.open(QIODevice::ReadOnly))
     {
         QString catalog_name;
         QTextStream stream(&ccFile);
         QString line;
 
         for (int times = 10; times >= 0 && !stream.atEnd(); --times)
         {
             line      = stream.readLine();
             int iname = line.indexOf("# Name: ");
             if (iname == 0)
             {
                 // line contains catalog name
                 iname        = line.indexOf(":") + 2;
                 catalog_name = line.mid(iname);
                 return catalog_name;
             }
         }
     }
 
     return QString();
 }
 
 bool CatalogDB::AddCatalogContents(const QString &fname)
 {
     QDir::setCurrent(QDir::homePath()); // for files with relative path
     QString filename = fname;
     // If the filename begins with "~", replace the "~" with the user's home
     // directory (otherwise, the file will not successfully open)
     if (filename.at(0) == '~')
         filename = QDir::homePath() + filename.mid(1, filename.length());
 
     QFile ccFile(filename);
 
     if (ccFile.open(QIODevice::ReadOnly))
     {
         QStringList columns; // list of data column descriptors in the header
         QString catalog_name;
         char delimiter;
 
         QTextStream stream(&ccFile);
         // TODO(spacetime) : Decide appropriate number of lines to be read
         QStringList lines;
         for (int times = 10; times >= 0 && !stream.atEnd(); --times)
             lines.append(stream.readLine());
         /*WAS
           * = stream.readAll().split('\n', QString::SkipEmptyParts);
           * Memory Hog!
           */
 
         if (lines.size() < 1 || !ParseCatalogInfoToDB(lines, columns, catalog_name, delimiter))
         {
             qWarning() << "Issue in catalog file header: " << filename;
             ccFile.close();
             return false;
         }
         ccFile.close();
         // The entry in the Catalog table is now ready!
 
         /*
           * Now 'Columns' should be a StringList of the Header contents
           * Hence, we 1) Convert the Columns to a KSParser compatible format
           *           2) Use KSParser to read stuff and store in DB
           */
 
         // Part 1) Conversion to KSParser compatible format
         QList<QPair<QString, KSParser::DataTypes>> sequence = buildParserSequence(columns);
 
         // Part 2) Read file and store into DB
         KSParser catalog_text_parser(filename, '#', sequence, delimiter);
 
         int catid = FindCatalog(catalog_name);
 
         skydb_.open();
         skydb_.transaction();
 
         QHash<QString, QVariant> row_content;
         while (catalog_text_parser.HasNextRow())
         {
             row_content = catalog_text_parser.ReadNextRow();
 
             CatalogEntryData catalog_entry;
 
             dms read_ra(row_content["RA"].toString(), false);
             dms read_dec(row_content["Dc"].toString(), true);
             //qDebug()<<row_content["Nm"].toString();
             catalog_entry.catalog_name   = catalog_name;
             catalog_entry.ID             = row_content["ID"].toInt();
             catalog_entry.long_name      = row_content["Nm"].toString();
             catalog_entry.ra             = read_ra.Degrees();
             catalog_entry.dec            = read_dec.Degrees();
             catalog_entry.type           = row_content["Tp"].toInt();
             catalog_entry.magnitude      = row_content["Mg"].toFloat();
             catalog_entry.position_angle = row_content["PA"].toFloat();
             catalog_entry.major_axis     = row_content["Mj"].toFloat();
             catalog_entry.minor_axis     = row_content["Mn"].toFloat();
             catalog_entry.flux           = row_content["Flux"].toFloat();
 
             _AddEntry(catalog_entry, catid);
         }
 
         skydb_.commit();
         skydb_.close();
     }
     return true;
 }
 
 bool CatalogDB::ParseCatalogInfoToDB(const QStringList &lines, QStringList &columns, QString &catalog_name,
                                      char &delimiter)
 {
     /*
     * Most of the code here is by Thomas Kabelmann from customcatalogcomponent.cpp
     * (now catalogcomponent.cpp)
     *
     * I have modified the already existing code into this method
     * -- Rishab Arora (spacetime)
     */
     bool foundDataColumns = false; // set to true if description of data
     // columns found
     int ncol = 0;
 
     QStringList errs;
     QString catPrefix, catColor, catFluxFreq, catFluxUnit;
     float catEpoch;
     bool showerrs = false;
 
     catalog_name.clear();
     catPrefix.clear();
     catColor.clear();
     catFluxFreq.clear();
     catFluxUnit.clear();
     catEpoch  = 0.;
     delimiter = '\0';
 
     int i = 0;
     for (; i < lines.size(); ++i)
     {
         QString d(lines.at(i)); // current data line
         if (d.at(0) != '#')
             break; // no longer in header!
 
         int idelimiter = d.indexOf("# Delimiter: ");
         int iname      = d.indexOf("# Name: ");
         int iprefix    = d.indexOf("# Prefix: ");
         int icolor     = d.indexOf("# Color: ");
         int iepoch     = d.indexOf("# Epoch: ");
         int ifluxfreq  = d.indexOf("# Flux Frequency: ");
         int ifluxunit  = d.indexOf("# Flux Unit: ");
 
         if (idelimiter == 0) // line contains delimiter
         {
             idelimiter = d.indexOf(":") + 2;
             qWarning() << idelimiter << d;
             if (delimiter == '\0')
             {
                 delimiter = d.mid(idelimiter).at(0).toLatin1();
             }
             else // duplicate name in header
             {
                 if (showerrs)
                     errs.append(i18n("Parsing header: ") + i18n("Extra Delimiter field in header: %1."
                                                                 "  Will be ignored",
                                                                 d.mid(idelimiter)));
             }
         }
         else if (iname == 0) // line contains catalog name
         {
             iname = d.indexOf(":") + 2;
             if (catalog_name.isEmpty())
             {
                 catalog_name = d.mid(iname);
             }
             else // duplicate name in header
             {
                 if (showerrs)
                     errs.append(i18n("Parsing header: ") + i18n("Extra Name field in header: %1."
                                                                 "  Will be ignored",
                                                                 d.mid(iname)));
             }
         }
         else if (iprefix == 0) // line contains catalog prefix
         {
             iprefix = d.indexOf(":") + 2;
             if (catPrefix.isEmpty())
             {
                 catPrefix = d.mid(iprefix);
             }
             else // duplicate prefix in header
             {
                 if (showerrs)
                     errs.append(i18n("Parsing header: ") + i18n("Extra Prefix field in header: %1."
                                                                 "  Will be ignored",
                                                                 d.mid(iprefix)));
             }
         }
         else if (icolor == 0) // line contains catalog prefix
         {
             icolor = d.indexOf(":") + 2;
             if (catColor.isEmpty())
             {
                 catColor = d.mid(icolor);
             }
             else // duplicate prefix in header
             {
                 if (showerrs)
                     errs.append(i18n("Parsing header: ") + i18n("Extra Color field in header: %1."
                                                                 "  Will be ignored",
                                                                 d.mid(icolor)));
             }
         }
         else if (iepoch == 0) // line contains catalog epoch
         {
             iepoch = d.indexOf(":") + 2;
             if (catEpoch == 0.)
             {
                 bool ok(false);
                 catEpoch = d.midRef(iepoch).toFloat(&ok);
                 if (!ok)
                 {
                     if (showerrs)
                         errs.append(i18n("Parsing header: ") + i18n("Could not convert Epoch to float: "
                                                                     "%1.  Using 2000. instead",
                                                                     d.mid(iepoch)));
                     catEpoch = 2000.; // adopt default value
                 }
             }
         }
         else if (ifluxfreq == 0) // line contains catalog flux frequnecy
         {
             ifluxfreq = d.indexOf(":") + 2;
             if (catFluxFreq.isEmpty())
             {
                 catFluxFreq = d.mid(ifluxfreq);
             }
             else // duplicate prefix in header
             {
                 if (showerrs)
                     errs.append(i18n("Parsing header: ") + i18n("Extra Flux Frequency field in header:"
                                                                 " %1.  Will be ignored",
                                                                 d.mid(ifluxfreq)));
             }
         }
         else if (ifluxunit == 0)
         {
             // line contains catalog flux unit
             ifluxunit = d.indexOf(":") + 2;
 
             if (catFluxUnit.isEmpty())
             {
                 catFluxUnit = d.mid(ifluxunit);
             }
             else // duplicate prefix in header
             {
                 if (showerrs)
                     errs.append(i18n("Parsing header: ") + i18n("Extra Flux Unit field in "
                                                                 "header: %1.  Will be ignored",
                                                                 d.mid(ifluxunit)));
             }
         }
         else if (!foundDataColumns) // don't try to parse data column
         {
             // descriptors if we already found them
             columns.clear();
 
             // Chomp off leading "#" character
             d = d.remove('#');
 
             // split on whitespace
             QStringList fields = d.split(' ', QString::SkipEmptyParts);
 
             // we need a copy of the master list of data fields, so we can
             // remove fields from it as they are encountered in the "fields" list.
             // this allows us to detect duplicate entries
             QStringList master(fields);
 
             for (int j = 0; j < fields.size(); ++j)
             {
                 QString s(fields.at(j));
                 if (master.contains(s))
                 {
                     // add the data field
                     columns.append(s);
 
                     // remove the field from the master list and inc the
                     // count of "good" columns (unless field is "Ignore")
                     if (s != "Ig")
                     {
                         master.removeAt(master.indexOf(s));
                         ncol++;
                     }
                 }
                 else if (fields.contains(s)) // duplicate field
                 {
                     fields.append("Ig"); // ignore the duplicate column
                     if (showerrs)
                         errs.append(i18n("Parsing header: ") + i18n("Duplicate data field descriptor "
                                                                     "\"%1\" will be ignored",
                                                                     s));
                 }
                 else // Invalid field
                 {
                     fields.append("Ig"); // ignore the invalid column
                     if (showerrs)
                         errs.append(i18n("Parsing header: ") + i18n("Invalid data field descriptor "
                                                                     "\"%1\" will be ignored",
                                                                     s));
                 }
             }
 
             if (ncol)
                 foundDataColumns = true;
         }
     }
 
     // For backward compatibility of old catalogs. No delimiter -> assume space
     if (delimiter == '\0')
         delimiter = ' ';
 
     if (!foundDataColumns)
     {
         if (showerrs)
             errs.append(i18n("Parsing header: ") + i18n("No valid column descriptors found.  Exiting"));
         return false;
     }
 
     if (i == lines.size())
     {
         if (showerrs)
             errs.append(i18n("Parsing header: ") + i18n("No data lines found after"
                                                         " header.  Exiting."));
         return false;
     }
     else
     {
         // Make sure Name, Prefix, Color and Epoch were set
         if (catalog_name.isEmpty())
         {
             if (showerrs)
                 errs.append(i18n("Parsing header: ") + i18n("No Catalog Name specified;"
                                                             " setting to \"Custom\""));
             catalog_name = i18n("Custom");
         }
         if (catPrefix.isEmpty())
         {
             if (showerrs)
                 errs.append(i18n("Parsing header: ") + i18n("No Catalog Prefix specified"
                                                             "; setting to \"CC\""));
             catPrefix = "CC";
         }
         if (catColor.isEmpty())
         {
             if (showerrs)
                 errs.append(i18n("Parsing header: ") + i18n("No Catalog Color specified"
                                                             "; setting to Red"));
             catColor = "#CC0000";
         }
         if (catEpoch == 0.)
         {
             if (showerrs)
                 errs.append(i18n("Parsing header: ") + i18n("No Catalog Epoch specified"
                                                             "; assuming 2000."));
             catEpoch = 2000.;
         }
 #ifndef KSTARS_LITE
         // Detect a duplicate catalog name
         if (FindCatalog(catalog_name) != -1)
         {
-            if (KMessageBox::warningYesNo(0,
+            if (KMessageBox::warningYesNo(nullptr,
                                           i18n("A catalog of the same name already exists. "
                                                "Overwrite contents? If you press yes, the"
                                                " new catalog will erase the old one!"),
                                           i18n("Overwrite Existing Catalog")) == KMessageBox::No)
             {
                 return false;
             }
             else
             {
                 RemoveCatalog(catalog_name);
             }
         }
 #endif
 
         // Everything OK. Make a new Catalog entry in DB
         CatalogData new_catalog;
 
         new_catalog.catalog_name = catalog_name;
         new_catalog.prefix       = catPrefix;
         new_catalog.color        = catColor;
         new_catalog.epoch        = catEpoch;
         new_catalog.fluxfreq     = catFluxFreq;
         new_catalog.fluxunit     = catFluxUnit;
 
         AddCatalog(new_catalog);
 
         return true;
     }
 }
 
 void CatalogDB::GetCatalogData(const QString &catalog_name, CatalogData &load_catalog)
 {
     skydb_.open();
-    QSqlTableModel catalog(0, skydb_);
+    QSqlTableModel catalog(nullptr, skydb_);
     catalog.setTable("Catalog");
     catalog.setFilter("Name LIKE \'" + catalog_name + "\'");
     catalog.select();
 
     QSqlRecord record     = catalog.record(0);
     load_catalog.prefix   = record.value("Prefix").toString();
     load_catalog.color    = record.value("Color").toString();
     load_catalog.fluxfreq = record.value("FluxFreq").toString();
     load_catalog.fluxunit = record.value("FluxUnit").toString();
     load_catalog.epoch    = record.value("Epoch").toFloat();
 
     catalog.clear();
     skydb_.close();
 }
 
 void CatalogDB::GetAllObjects(const QString &catalog, QList<SkyObject *> &sky_list,
                               QList<QPair<int, QString>> &object_names, CatalogComponent *catalog_ptr,
                               bool includeCatalogDesignation)
 {
     qDeleteAll(sky_list);
     sky_list.clear();
     QString selected_catalog = QString::number(FindCatalog(catalog));
 
     skydb_.open();
     QSqlQuery get_query(skydb_);
     get_query.prepare("SELECT Epoch, Type, RA, Dec, Magnitude, Prefix, "
                       "IDNumber, LongName, MajorAxis, MinorAxis, "
                       "PositionAngle, Flux FROM ObjectDesignation JOIN DSO "
                       "JOIN Catalog WHERE Catalog.id = :catID AND "
                       "ObjectDesignation.id_Catalog = Catalog.id AND "
                       "ObjectDesignation.UID_DSO = DSO.UID");
     get_query.bindValue(":catID", selected_catalog);
 
     //     qWarning() << get_query.lastQuery();
     //     qWarning() << get_query.lastError();
     //     qWarning() << FindCatalog(catalog);
 
     if (!get_query.exec())
     {
         qWarning() << get_query.lastQuery();
         qWarning() << get_query.lastError();
     }
 
     while (get_query.next())
     {
         int cat_epoch       = get_query.value(0).toInt();
         unsigned char iType = get_query.value(1).toInt();
         dms RA(get_query.value(2).toDouble());
         dms Dec(get_query.value(3).toDouble());
         float mag                = get_query.value(4).toFloat();
         QString catPrefix        = get_query.value(5).toString();
         int id_number_in_catalog = get_query.value(6).toInt();
         QString lname            = get_query.value(7).toString();
         float a                  = get_query.value(8).toFloat();
         float b                  = get_query.value(9).toFloat();
         float PA                 = get_query.value(10).toFloat();
         float flux               = get_query.value(11).toFloat();
         QString name;
 
         if (!includeCatalogDesignation && !lname.isEmpty())
         {
             name  = lname;
             lname = QString();
         }
         else
             name = catPrefix + ' ' + QString::number(id_number_in_catalog);
 
         SkyPoint t;
         t.set(RA, Dec);
 
         if (cat_epoch == 1950)
         {
             // Assume B1950 epoch
             t.B1950ToJ2000(); // t.ra() and t.dec() are now J2000.0
             // coordinates
         }
         else if (cat_epoch == 2000)
         {
             // Do nothing
             {
             }
         }
         else
         {
             // FIXME: What should we do?
             // FIXME: This warning will be printed for each line in the
             //        catalog rather than once for the entire catalog
             qWarning() << "Unknown epoch while dealing with custom "
                           "catalog. Will ignore the epoch and assume"
                           " J2000.0";
         }
 
         RA  = t.ra();
         Dec = t.dec();
 
         // FIXME: It is a bad idea to create objects in one class
         // (using new) and delete them in another! The objects created
         // here are usually deleted by CatalogComponent! See
         // CatalogComponent::loadData for more information!
 
         if (iType == 0) // Add a star
         {
             StarObject *o = new StarObject(RA, Dec, mag, lname);
 
             sky_list.append(o);
         }
         else // Add a deep-sky object
         {
             DeepSkyObject *o = new DeepSkyObject(iType, RA, Dec, mag, name, QString(), lname, catPrefix, a, b, -PA);
 
             o->setFlux(flux);
             o->setCustomCatalog(catalog_ptr);
 
             sky_list.append(o);
 
             // Add name to the list of object names
             if (!name.isEmpty())
             {
                 object_names.append(qMakePair<int, QString>(iType, name));
             }
         }
 
         if (!lname.isEmpty() && lname != name)
         {
             object_names.append(qMakePair<int, QString>(iType, lname));
         }
     }
 
     get_query.clear();
     skydb_.close();
 }
 
 QList<QPair<QString, KSParser::DataTypes>> CatalogDB::buildParserSequence(const QStringList &Columns)
 {
     QList<QPair<QString, KSParser::DataTypes>> sequence;
     QStringList::const_iterator iter = Columns.begin();
 
     while (iter != Columns.end())
     {
         // Available Types: ID RA Dc Tp Nm Mg Flux Mj Mn PA Ig
         KSParser::DataTypes current_type;
 
         if (*iter == QString("ID"))
             current_type = KSParser::D_QSTRING;
         else if (*iter == QString("RA"))
             current_type = KSParser::D_QSTRING;
         else if (*iter == QString("Dc"))
             current_type = KSParser::D_QSTRING;
         else if (*iter == QString("Tp"))
             current_type = KSParser::D_INT;
         else if (*iter == QString("Nm"))
             current_type = KSParser::D_QSTRING;
         else if (*iter == QString("Mg"))
             current_type = KSParser::D_FLOAT;
         else if (*iter == QString("Flux"))
             current_type = KSParser::D_FLOAT;
         else if (*iter == QString("Mj"))
             current_type = KSParser::D_FLOAT;
         else if (*iter == QString("Mn"))
             current_type = KSParser::D_FLOAT;
         else if (*iter == QString("PA"))
             current_type = KSParser::D_FLOAT;
         else if (*iter == QString("Ig"))
             current_type = KSParser::D_SKIP;
 
         sequence.append(qMakePair(*iter, current_type));
         ++iter;
     }
 
     return sequence;
 }
diff --git a/kstars/auxiliary/QRoundProgressBar.h b/kstars/auxiliary/QRoundProgressBar.h
index 96efd4bc2..3fd5042e5 100644
--- a/kstars/auxiliary/QRoundProgressBar.h
+++ b/kstars/auxiliary/QRoundProgressBar.h
@@ -1,252 +1,252 @@
 /*
  * QRoundProgressBar - a circular progress bar Qt widget.
  *
  * Sintegrial Technologies (c) 2015-now
  *
  * The software is freeware and is distributed "as is" with the complete source codes.
  * Anybody is free to use it in any software projects, either commercial or non-commercial.
  * Please do not remove this copyright message and remain the name of the author unchanged.
  *
  * It is very appreciated if you produce some feedback to us case you are going to use
  * the software.
  *
  * Please send your questions, suggestions, and information about found issues to the
  *
  * sintegrial@gmail.com
  *
  */
 
 #ifndef QROUNDPROGRESSBAR_H
 #define QROUNDPROGRESSBAR_H
 
 #include <QWidget>
 
 /**
  * @brief The QRoundProgressBar class represents a circular progress bar and maintains its API
  * similar to the *QProgressBar*.
  *
  * ### Styles
  * QRoundProgressBar currently supports Donut, Pie and Line styles. See setBarStyle() for more details.
  *
  * ### Colors
  * Generally QRoundProgressBar uses its palette and font attributes to define how it will look.
  *
  * The following \a QPalette members are considered:
  * - *QPalette::Window*   background of the whole widget (normally should be set to Qt::NoBrush)
  * - *QPalette::Base*     background of the non-filled progress bar area (should be set to Qt::NoBrush to make it transparent)
  * - *QPalette::AlternateBase*  background of the central circle where the text is shown (for \a Donut style)
  * - *QPalette::Shadow*         foreground of the non-filled progress bar area (i.e. border color)
  * - *QPalette::Highlight*      background of the filled progress bar area
  * - *QPalette::Text*           color of the text shown in the center
  *
  * Create a \a QPalette with given attributes and apply it via `setPalette()`.
  *
  * ### Color gradient
  * \a Donut and \a Pie styles allow to use color gradient for currernt value area instead of plain brush fill.
  * See setDataColors() for more details.
  *
  * ### Value text
  * Value text is generally drawn inside the QRoundProgressBar using its `font()` and \a QPalette::Text role from its `palette()`.
  *
  * To define pattern of the text, use setFormat() function (see Qt's \a QProgressBar for more details).
  *
  * To define number of decimals to be shown, use setDecimals() function.
  *
  * ### Font
  * To use own font for value text, apply it via `setFont()`.
  *
  * By default, font size will be adjusted automatically to fit the inner circle of the widget.
  */
 class QRoundProgressBar : public QWidget
 {
     Q_OBJECT
   public:
-    explicit QRoundProgressBar(QWidget *parent = 0);
+    explicit QRoundProgressBar(QWidget *parent = nullptr);
 
     static const int PositionLeft   = 180;
     static const int PositionTop    = 90;
     static const int PositionRight  = 0;
     static const int PositionBottom = -90;
 
     /**
          * @brief Return position (in degrees) of minimum value.
          * \sa setNullPosition
          */
     double nullPosition() const { return m_nullPosition; }
     /**
          * @brief Defines position of minimum value.
          * @param position position on the circle (in degrees) of minimum value
          * \sa nullPosition
          */
     void setNullPosition(double position);
 
     /**
          * @brief The BarStyle enum defines general look of the progress bar.
          */
     enum BarStyle
     {
         /// Donut style (filled torus around the text)
         StyleDonut,
         /// Pie style (filled pie segment with the text in center)
         StylePie,
         /// Line style (thin round line around the text)
         StyleLine
     };
     /**
          * @brief Sets visual style of the widget.
          * \sa barStyle
          */
     void setBarStyle(BarStyle style);
     /**
          * @brief Returns current progree bar style.
          * \sa setBarStyle
          */
     BarStyle barStyle() const { return m_barStyle; }
 
     /**
          * @brief Sets width of the outline circle pen.
          * @param penWidth width of the outline circle pen (in pixels)
          */
     void setOutlinePenWidth(double penWidth);
     /**
          * @brief Returns width of the outline circle pen.
          */
     double outlinePenWidth() const { return m_outlinePenWidth; }
 
     /**
          * @brief Sets width of the data circle pen.
          * @param penWidth width of the data circle pen (in pixels)
          */
     void setDataPenWidth(double penWidth);
     /**
          * @brief Returns width of the data circle pen.
          */
     double dataPenWidth() const { return m_dataPenWidth; }
 
     /**
          * @brief Sets colors of the visible data and makes gradient brush from them.
          * Gradient colors can be set for \a Donut and \a Pie styles (see setBarStyle() function).
          *
          * *Warning*: this function will override widget's `palette()` to set dynamically created gradient brush.
          *
          * @param stopPoints List of colors (should have at least 2 values, see Qt's \a QGradientStops for more details).
          * Color value at point 0 corresponds to the minimum() value, while color value at point 1
          * corresponds to the maximum(). Other colors will be distributed accordingly to the defined ranges (see setRange()).
          */
     void setDataColors(const QGradientStops &stopPoints);
 
     /**
          * @brief Defines the string used to generate the current text.
          * If no format is set, no text will be shown.
          * @param format see \a QProgressBar's format description
          * \sa setDecimals
          */
     void setFormat(const QString &format);
     /**
          * @brief Sets format string to empty string. No text will be shown therefore.
          * See setFormat() for more information.
          */
     void resetFormat();
     /**
          * @brief Returns the string used to generate the current text.
          */
     QString format() const { return m_format; }
 
     /**
          * @brief Sets number of decimals to show after the comma (default is 1).
          * \sa setFormat
          */
     void setDecimals(int count);
     /**
          * @brief Returns number of decimals to show after the comma (default is 1).
          * \sa setFormat, setDecimals
          */
     int decimals() const { return m_decimals; }
 
     /**
          * @brief Returns current value shown on the widget.
          * \sa setValue()
          */
     double value() const { return m_value; }
     /**
          * @brief Returns minimum of the allowed value range.
          * \sa setMinimum, setRange
          */
     double minimum() const { return m_min; }
     /**
          * @brief Returns maximum of the allowed value range.
         * \sa setMaximum, setRange
          */
     double maximum() const { return m_max; }
 
   public Q_SLOTS:
     /**
          * @brief Defines minimum und maximum of the allowed value range.
          * If the current value does not fit into the range, it will be automatically adjusted.
          * @param min minimum of the allowed value range
          * @param max maximum of the allowed value range
          */
     void setRange(double min, double max);
     /**
          * @brief Defines minimum of the allowed value range.
          * If the current value does not fit into the range, it will be automatically adjusted.
          * @param min minimum of the allowed value range
          * \sa setRange
          */
     void setMinimum(double min);
     /**
          * @brief Defines maximum of the allowed value range.
          * If the current value does not fit into the range, it will be automatically adjusted.
          * @param max maximum of the allowed value range
          * \sa setRange
          */
     void setMaximum(double max);
     /**
          * @brief Sets a value which will be shown on the widget.
          * @param val must be between minimum() and maximum()
          */
     void setValue(double val);
     /**
          * @brief Integer version of the previous slot.
          * @param val must be between minimum() and maximum()
          */
     void setValue(int val);
 
   protected:
     void paintEvent(QPaintEvent *event) override;
     virtual void drawBackground(QPainter &p, const QRectF &baseRect);
     virtual void drawBase(QPainter &p, const QRectF &baseRect);
     virtual void drawValue(QPainter &p, const QRectF &baseRect, double value, double arcLength);
     virtual void calculateInnerRect(const QRectF &baseRect, double outerRadius, QRectF &innerRect, double &innerRadius);
     virtual void drawInnerBackground(QPainter &p, const QRectF &innerRect);
     virtual void drawText(QPainter &p, const QRectF &innerRect, double innerRadius, double value);
     virtual QString valueToText(double value) const;
     virtual void valueFormatChanged();
 
     QSize minimumSizeHint() const override { return QSize(32, 32); }
 
     bool hasHeightForWidth() const override { return true; }
     int heightForWidth(int w) const override { return w; }
 
     void rebuildDataBrushIfNeeded();
 
     double m_min, m_max;
     double m_value;
 
     double m_nullPosition;
     BarStyle m_barStyle;
     double m_outlinePenWidth, m_dataPenWidth;
 
     QGradientStops m_gradientData;
     bool m_rebuildBrush;
 
     QString m_format;
     int m_decimals;
 
     static const int UF_VALUE   = 1;
     static const int UF_PERCENT = 2;
     static const int UF_MAX     = 4;
     int m_updateFlags;
 };
 
 #endif // QROUNDPROGRESSBAR_H
diff --git a/kstars/auxiliary/imageexporter.cpp b/kstars/auxiliary/imageexporter.cpp
index d34742e8e..40babb273 100644
--- a/kstars/auxiliary/imageexporter.cpp
+++ b/kstars/auxiliary/imageexporter.cpp
@@ -1,288 +1,288 @@
 /***************************************************************************
                 imageexporter.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun 13 Jan 2013 00:53:50 CST
     copyright            : (c) 2013 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 /* Project Includes */
 #include "imageexporter.h"
 #include "kstars.h"
 #include "skyqpainter.h"
 #include "skymap.h"
 
 #include <KJob>
 #include <KIO/StoredTransferJob>
 
 /* Qt Includes */
 #include <QTemporaryFile>
 #include <QStatusBar>
 #include <QtSvg/QSvgGenerator>
 
-ImageExporter::ImageExporter(QObject *parent) : QObject(parent), m_includeLegend(false), m_Size(0)
+ImageExporter::ImageExporter(QObject *parent) : QObject(parent), m_includeLegend(false), m_Size(nullptr)
 {
     m_Legend = new Legend;
 
     // set font for legend labels
     m_Legend->setFont(QFont("Courier New", 8));
 
     // set up the default alpha
     setLegendAlpha(160);
 }
 
 void ImageExporter::exportSvg(const QString &fileName)
 {
     SkyMap *map = SkyMap::Instance();
 
     // export as SVG
     QSvgGenerator svgGenerator;
     svgGenerator.setFileName(fileName);
     svgGenerator.setTitle(i18n("KStars Exported Sky Image"));
     svgGenerator.setDescription(i18n("KStars Exported Sky Image"));
     svgGenerator.setSize(QSize(map->width(), map->height()));
     svgGenerator.setResolution(qMax(map->logicalDpiX(), map->logicalDpiY()));
     svgGenerator.setViewBox(QRect(0, 0, map->width(), map->height()));
 
     SkyQPainter painter(KStars::Instance(), &svgGenerator);
     painter.begin();
 
     map->exportSkyImage(&painter);
 
     if (m_includeLegend)
     {
         addLegend(&painter);
     }
 
     painter.end();
 }
 
 bool ImageExporter::exportRasterGraphics(const QString &fileName)
 {
     //Determine desired image format from filename extension
     QString ext = fileName.mid(fileName.lastIndexOf(".") + 1);
 
     // export as raster graphics
     const char *format = "PNG";
 
     if (ext.toLower() == "png")
     {
         format = "PNG";
     }
     else if (ext.toLower() == "jpg" || ext.toLower() == "jpeg")
     {
         format = "JPG";
     }
     else if (ext.toLower() == "gif")
     {
         format = "GIF";
     }
     else if (ext.toLower() == "pnm")
     {
         format = "PNM";
     }
     else if (ext.toLower() == "bmp")
     {
         format = "BMP";
     }
     else
     {
         qWarning() << i18n("Could not parse image format of %1; assuming PNG.", fileName);
     }
 
     SkyMap *map = SkyMap::Instance();
 
     int width, height;
     if (m_Size)
     {
         width  = m_Size->width();
         height = m_Size->height();
     }
     else
     {
         width  = map->width();
         height = map->height();
     }
 
     QPixmap skyimage(map->width(), map->height());
     QPixmap outimage(width, height);
     outimage.fill();
 
     map->exportSkyImage(&skyimage);
     qApp->processEvents();
 
     //skyImage is the size of the sky map.  The requested image size is w x h.
     //If w x h is smaller than the skymap, then we simply crop the image.
     //If w x h is larger than the skymap, pad the skymap image with a white border.
     if (width == map->width() && height == map->height())
     {
         outimage = skyimage.copy();
     }
 
     else
     {
         int dx(0), dy(0), sx(0), sy(0);
         int sw(map->width()), sh(map->height());
 
         if (width > map->width())
         {
             dx = (width - map->width()) / 2;
         }
 
         else
         {
             sx = (map->width() - width) / 2;
             sw = width;
         }
 
         if (height > map->height())
         {
             dy = (height - map->height()) / 2;
         }
 
         else
         {
             sy = (map->height() - height) / 2;
             sh = height;
         }
 
         QPainter p;
         p.begin(&outimage);
         p.fillRect(outimage.rect(), QBrush(Qt::white));
         p.drawImage(dx, dy, skyimage.toImage(), sx, sy, sw, sh);
         p.end();
     }
 
     if (m_includeLegend)
     {
         addLegend(&outimage);
     }
 
     if (!outimage.save(fileName, format))
     {
         m_lastErrorMessage = i18n("Error: Unable to save image: %1 ", fileName);
         qDebug() << m_lastErrorMessage;
         return false;
     }
 
     else
     {
         KStars::Instance()->statusBar()->showMessage(i18n("Saved image to %1", fileName));
         return true;
     }
 }
 void ImageExporter::addLegend(SkyQPainter *painter)
 {
     m_Legend->paintLegend(painter);
 }
 
 void ImageExporter::addLegend(QPaintDevice *pd)
 {
     SkyQPainter painter(KStars::Instance(), pd);
     painter.begin();
 
     addLegend(&painter);
 
     painter.end();
 }
 
 bool ImageExporter::exportImage(QString url)
 {
     QUrl fileURL = QUrl::fromUserInput(url);
 
     m_lastErrorMessage = QString();
     if (fileURL.isValid())
     {
         QTemporaryFile tmpfile;
         QString fname;
         bool isLocalFile = fileURL.isLocalFile();
 
         if (isLocalFile)
         {
             fname = fileURL.toLocalFile();
         }
 
         else
         {
             tmpfile.open();
             fname = tmpfile.fileName();
         }
 
         //Determine desired image format from filename extension
         QString ext = fname.mid(fname.lastIndexOf(".") + 1);
         if (ext.toLower() == "svg")
         {
             exportSvg(fname);
         }
 
         else
         {
             return exportRasterGraphics(fname);
         }
 
         if (!isLocalFile)
         {
             //attempt to upload image to remote location
             KIO::StoredTransferJob *put_job = KIO::storedHttpPost(&tmpfile, fileURL, -1);
             //if(!KIO::NetAccess::upload(tmpfile.fileName(), fileURL, m_KStars))
             if (put_job->exec() == false)
             {
                 m_lastErrorMessage = i18n("Could not upload image to remote location: %1", fileURL.url());
                 qWarning() << m_lastErrorMessage;
                 return false;
             }
         }
         return true;
     }
     m_lastErrorMessage = i18n("Could not export image: URL %1 invalid", fileURL.url());
     qWarning() << m_lastErrorMessage;
     return false;
 }
 
 void ImageExporter::setLegendProperties(Legend::LEGEND_TYPE type, Legend::LEGEND_ORIENTATION orientation,
                                         Legend::LEGEND_POSITION position, int alpha, bool include)
 {
     // set background color (alpha)
     setLegendAlpha(alpha);
     // set legend orientation
     m_Legend->setOrientation(orientation);
 
     // set legend type
     m_Legend->setType(type);
 
     // set legend position
     m_Legend->setPosition(position);
 
     m_includeLegend = include;
 }
 
 ImageExporter::~ImageExporter()
 {
     delete m_Legend;
 }
 
 void ImageExporter::setRasterOutputSize(const QSize *size)
 {
     if (size)
         m_Size = new QSize(*size); // make a copy, so it's safe if the original gets deleted
     else
         m_Size = nullptr;
 }
 
 void ImageExporter::setLegendAlpha(int alpha)
 {
     Q_ASSERT(alpha >= 0 && alpha <= 255);
     Q_ASSERT(m_Legend);
     QColor bgColor = m_Legend->getBgColor();
     bgColor.setAlpha(alpha);
     m_Legend->setBgColor(bgColor);
 }
diff --git a/kstars/auxiliary/imageviewer.cpp b/kstars/auxiliary/imageviewer.cpp
index 3911c320b..aa46a6256 100644
--- a/kstars/auxiliary/imageviewer.cpp
+++ b/kstars/auxiliary/imageviewer.cpp
@@ -1,377 +1,377 @@
 /***************************************************************************
                           imageviewer.cpp  -  An ImageViewer for KStars
                              -------------------
     begin                : Mon Aug 27 2001
     copyright            : (C) 2001 by Thomas Kabelmann
     email                : tk78@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "imageviewer.h"
 
 #ifndef KSTARS_LITE
 #include "kstars.h"
 #endif
 
 #ifndef KSTARS_LITE
 #include <KMessageBox>
 #endif
 
 #include <QDesktopWidget>
 #include <QFileDialog>
 #include <QPainter>
 #include <QResizeEvent>
 #include <QStatusBar>
 #include <QTemporaryFile>
 
 QUrl ImageViewer::lastURL = QUrl::fromLocalFile(QDir::homePath());
 
 ImageLabel::ImageLabel(QWidget *parent) : QFrame(parent)
 {
 #ifndef KSTARS_LITE
     setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Expanding);
     setFrameStyle(QFrame::StyledPanel | QFrame::Plain);
     setLineWidth(2);
 #endif
 }
 
 ImageLabel::~ImageLabel()
 {
 }
 
 void ImageLabel::setImage(const QImage &img)
 {
 #ifndef KSTARS_LITE
     m_Image = img;
     pix     = QPixmap::fromImage(m_Image);
 #endif
 }
 
 void ImageLabel::invertPixels()
 {
 #ifndef KSTARS_LITE
     m_Image.invertPixels();
     pix = QPixmap::fromImage(m_Image.scaled(width(), height(), Qt::KeepAspectRatio));
 #endif
 }
 
 void ImageLabel::paintEvent(QPaintEvent *)
 {
 #ifndef KSTARS_LITE
     QPainter p;
     p.begin(this);
     int x = 0;
     if (pix.width() < width())
         x = (width() - pix.width()) / 2;
     p.drawPixmap(x, 0, pix);
     p.end();
 #endif
 }
 
 void ImageLabel::resizeEvent(QResizeEvent *event)
 {
     int w = pix.width();
     int h = pix.height();
 
     if (event->size().width() == w && event->size().height() == h)
         return;
 
     pix = QPixmap::fromImage(m_Image.scaled(event->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
 }
 
-ImageViewer::ImageViewer(const QString &caption, QWidget *parent) : QDialog(parent), fileIsImage(false), downloadJob(0)
+ImageViewer::ImageViewer(const QString &caption, QWidget *parent) : QDialog(parent), fileIsImage(false), downloadJob(nullptr)
 {
 #ifndef KSTARS_LITE
     init(caption, QString());
 #endif
 }
 
 ImageViewer::ImageViewer(const QUrl &url, const QString &capText, QWidget *parent)
     : QDialog(parent), m_ImageUrl(url)
 {
 #ifndef KSTARS_LITE
     init(url.fileName(), capText);
 
     // check URL
     if (!m_ImageUrl.isValid())
         qDebug() << "URL is malformed: " << m_ImageUrl;
 
     if (m_ImageUrl.isLocalFile())
     {
         loadImage(m_ImageUrl.toLocalFile());
         return;
     }
 
     {
         QTemporaryFile tempfile;
         tempfile.open();
         file.setFileName(tempfile.fileName());
     } // we just need the name and delete the tempfile from disc; if we don't do it, a dialog will be show
 
     loadImageFromURL();
 #endif
 }
 
 void ImageViewer::init(QString caption, QString capText)
 {
 #ifndef KSTARS_LITE
     setAttribute(Qt::WA_DeleteOnClose, true);
     setModal(false);
     setWindowTitle(i18n("KStars image viewer: %1", caption));
 
     // Create widget
     QFrame *page = new QFrame(this);
 
     //setMainWidget( page );
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(page);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     QPushButton *invertB = new QPushButton(i18n("Invert colors"));
     invertB->setToolTip(i18n("Reverse colors of the image. This is useful to enhance contrast at times. This affects "
                              "only the display and not the saving."));
     QPushButton *saveB = new QPushButton(
         QIcon::fromTheme("document-save", QIcon(":/icons/breeze/default/document-save.svg")), i18n("Save"));
     saveB->setToolTip(i18n("Save the image to disk"));
 
     buttonBox->addButton(invertB, QDialogButtonBox::ActionRole);
     buttonBox->addButton(saveB, QDialogButtonBox::ActionRole);
 
     connect(invertB, SIGNAL(clicked()), this, SLOT(invertColors()));
     connect(saveB, SIGNAL(clicked()), this, SLOT(saveFileToDisc()));
 
     m_View = new ImageLabel(page);
     m_View->setAutoFillBackground(true);
     m_Caption = new QLabel(page);
     m_Caption->setAutoFillBackground(true);
     m_Caption->setFrameShape(QFrame::StyledPanel);
     m_Caption->setText(capText);
     // Add layout
     QVBoxLayout *vlay = new QVBoxLayout(page);
     vlay->setSpacing(0);
     vlay->setMargin(0);
     vlay->addWidget(m_View);
     vlay->addWidget(m_Caption);
 
     //Reverse colors
     QPalette p = palette();
     p.setColor(QPalette::Window, palette().color(QPalette::WindowText));
     p.setColor(QPalette::WindowText, palette().color(QPalette::Window));
     m_Caption->setPalette(p);
     m_View->setPalette(p);
 
     //If the caption is wider than the image, try to shrink the font a bit
     QFont capFont = m_Caption->font();
     capFont.setPointSize(capFont.pointSize() - 2);
     m_Caption->setFont(capFont);
 #endif
 }
 
 ImageViewer::~ImageViewer()
 {
     QString filename = file.fileName();
     if (filename.startsWith(QLatin1String("/tmp/")) || filename.contains("/Temp"))
     {
         if (m_ImageUrl.isEmpty() == false ||
-            KMessageBox::questionYesNo(0, i18n("Remove temporary file %1 from disk?", filename),
+            KMessageBox::questionYesNo(nullptr, i18n("Remove temporary file %1 from disk?", filename),
                                        i18n("Confirm Removal"), KStandardGuiItem::yes(), KStandardGuiItem::no(),
                                        i18n("imageviewer_temporary_file_removal")) == KMessageBox::Yes)
             QFile::remove(filename);
     }
 
     QApplication::restoreOverrideCursor();
 }
 
 void ImageViewer::loadImageFromURL()
 {
 #ifndef KSTARS_LITE
     QUrl saveURL = QUrl::fromLocalFile(file.fileName());
 
     if (!saveURL.isValid())
         qWarning() << "tempfile-URL is malformed";
 
     QApplication::setOverrideCursor(Qt::WaitCursor);
 
     downloadJob.setProgressDialogEnabled(true, i18n("Download"),
                                          i18n("Please wait while image is being downloaded..."));
     connect(&downloadJob, SIGNAL(downloaded()), this, SLOT(downloadReady()));
     connect(&downloadJob, SIGNAL(canceled()), this, SLOT(close()));
     connect(&downloadJob, SIGNAL(error(QString)), this, SLOT(downloadError(QString)));
 
     downloadJob.get(m_ImageUrl);
 #endif
 }
 
 void ImageViewer::downloadReady()
 {
 #ifndef KSTARS_LITE
     QApplication::restoreOverrideCursor();
 
     if (file.open(QFile::WriteOnly))
     {
         file.write(downloadJob.downloadedData());
         file.close(); // to get the newest information from the file and not any information from opening of the file
 
         if (file.exists())
         {
             showImage();
             return;
         }
 
         close();
     }
     else
-        KMessageBox::error(0, file.errorString(), i18n("Image Viewer"));
+        KMessageBox::error(nullptr, file.errorString(), i18n("Image Viewer"));
 #endif
 }
 
 void ImageViewer::downloadError(const QString &errorString)
 {
 #ifndef KSTARS_LITE
     QApplication::restoreOverrideCursor();
     KMessageBox::error(this, errorString);
 #endif
 }
 
 bool ImageViewer::loadImage(const QString &filename)
 {
 #ifndef KSTARS_LITE
     file.setFileName(filename);
     return showImage();
 #else
     return false;
 #endif
 }
 
 bool ImageViewer::showImage()
 {
 #ifndef KSTARS_LITE
     QImage image;
 
     if (!image.load(file.fileName()))
     {
         QString text = i18n("Loading of the image %1 failed.", m_ImageUrl.url());
         KMessageBox::error(this, text);
         close();
         return false;
     }
 
     fileIsImage = true; // we loaded the file and know now, that it is an image
 
     //If the image is larger than screen width and/or screen height,
     //shrink it to fit the screen
     QRect deskRect = QApplication::desktop()->availableGeometry();
     int w          = deskRect.width();  // screen width
     int h          = deskRect.height(); // screen height
 
     if (image.width() <= w && image.height() > h) //Window is taller than desktop
         image = image.scaled(int(image.width() * h / image.height()), h);
     else if (image.height() <= h && image.width() > w) //window is wider than desktop
         image = image.scaled(w, int(image.height() * w / image.width()));
     else if (image.width() > w && image.height() > h) //window is too tall and too wide
     {
         //which needs to be shrunk least, width or height?
         float fx = float(w) / float(image.width());
         float fy = float(h) / float(image.height());
         if (fx > fy) //width needs to be shrunk less, so shrink to fit in height
             image = image.scaled(int(image.width() * fy), h);
         else //vice versa
             image = image.scaled(w, int(image.height() * fx));
     }
 
     show(); // hide is default
 
     m_View->setImage(image);
     w = image.width();
 
     //If the caption is wider than the image, set the window size
     //to fit the caption
     if (m_Caption->width() > w)
         w = m_Caption->width();
     //setFixedSize( w, image.height() + m_Caption->height() );
 
     resize(w, image.height());
     update();
     show();
 
     return true;
 #else
     return false;
 #endif
 }
 
 void ImageViewer::saveFileToDisc()
 {
 #ifndef KSTARS_LITE
     QFileDialog dialog;
 
     QUrl newURL =
         dialog.getSaveFileUrl(KStars::Instance(), i18n("Save Image"), lastURL); // save-dialog with default filename
     if (!newURL.isEmpty())
     {
         //QFile f (newURL.adjusted(QUrl::RemoveFilename|QUrl::StripTrailingSlash).toLocalFile() + '/' +  newURL.fileName());
         QFile f(newURL.toLocalFile());
         if (f.exists())
         {
             int r = KMessageBox::warningContinueCancel(static_cast<QWidget *>(parent()),
                                                        i18n("A file named \"%1\" already exists. "
                                                             "Overwrite it?",
                                                             newURL.fileName()),
                                                        i18n("Overwrite File?"), KStandardGuiItem::overwrite());
             if (r == KMessageBox::Cancel)
                 return;
 
             f.remove();
         }
 
         lastURL = QUrl(newURL.toString(QUrl::RemoveFilename));
 
         saveFile(newURL);
     }
 #endif
 }
 
 void ImageViewer::saveFile(QUrl &url)
 {
     // synchronous access to prevent segfaults
 
     //if (!KIO::NetAccess::file_copy (QUrl (file.fileName()), url, (QWidget*) 0))
     //QUrl tmpURL((file.fileName()));
     //tmpURL.setScheme("file");
 
     if (file.copy(url.toLocalFile()) == false)
     //if (KIO::file_copy(tmpURL, url)->exec() == false)
     {
         QString text = i18n("Saving of the image %1 failed.", url.toString());
 #ifndef KSTARS_LITE
         KMessageBox::error(this, text);
 #else
         qDebug() << text;
 #endif
     }
 #ifndef KSTARS_LITE
     else
         KStars::Instance()->statusBar()->showMessage(i18n("Saved image to %1", url.toString()));
 #endif
 }
 
 void ImageViewer::invertColors()
 {
 #ifndef KSTARS_LITE
     // Invert colors
     m_View->invertPixels();
     m_View->update();
 #endif
 }
diff --git a/kstars/auxiliary/ksdssdownloader.cpp b/kstars/auxiliary/ksdssdownloader.cpp
index f5df36e48..7281d938f 100644
--- a/kstars/auxiliary/ksdssdownloader.cpp
+++ b/kstars/auxiliary/ksdssdownloader.cpp
@@ -1,352 +1,352 @@
 /***************************************************************************
                  ksdssdownloader.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Tue 05 Jan 2016 03:39:18 CST
     copyright            : (c) 2016 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "ksdssdownloader.h"
 
 #include "deepskyobject.h"
 #include "Options.h"
 #include "auxiliary/filedownloader.h"
 
 #include <QImageWriter>
 #include <QMimeDatabase>
 
 
 KSDssDownloader::KSDssDownloader(QObject *parent) : QObject(parent)
 {
     connect(this, &KSDssDownloader::downloadCanceled, this, [&]() { deleteLater(); });
     m_VersionPreference << "poss2ukstu_blue"
                         << "poss2ukstu_red"
                         << "poss1_blue"
                         << "poss1_red"
                         << "quickv"
                         << "poss2ukstu_ir";
     m_TempFile.open();
 }
 
 KSDssDownloader::KSDssDownloader(const SkyPoint *const p, const QString &destFileName,
                                  const std::function<void(bool)> &slotDownloadReady, QObject *parent)
     : QObject(parent)
 {
     // Initialize version preferences. FIXME: This must be made a
     // user-changeable option just in case someone likes red
 
     connect(this, &KSDssDownloader::downloadCanceled, this, [&]() { deleteLater(); });
 
     m_VersionPreference << "poss2ukstu_blue"
                         << "poss2ukstu_red"
                         << "poss1_blue"
                         << "poss1_red"
                         << "quickv"
                         << "poss2ukstu_ir";
     m_TempFile.open();
     connect(this, &KSDssDownloader::downloadComplete, slotDownloadReady);
     startDownload(p, destFileName);
 }
 
 QString KSDssDownloader::getDSSURL(const SkyPoint *const p, const QString &version, struct KSDssImage::Metadata *md)
 {
-    const DeepSkyObject *dso = 0;
+    const DeepSkyObject *dso = nullptr;
     double height, width;
 
     double dss_default_size = Options::defaultDSSImageSize();
     double dss_padding      = Options::dSSPadding();
 
     Q_ASSERT(p);
     Q_ASSERT(dss_default_size > 0.0 && dss_padding >= 0.0);
 
     dso = dynamic_cast<const DeepSkyObject *>(p);
 
     // Decide what to do about the height and width
     if (dso)
     {
         // For deep-sky objects, use their height and width information
         double a, b, pa;
         a = dso->a();
         b = dso->a() *
             dso->e(); // Use a * e instead of b, since e() returns 1 whenever one of the dimensions is zero. This is important for circular objects
         Q_ASSERT(a >= b);
         pa = dso->pa() * dms::DegToRad;
 
         // We now want to convert a, b, and pa into an image
         // height and width -- i.e. a dRA and dDec.
         // DSS uses dDec for height and dRA for width. (i.e. "top" is north in the DSS images, AFAICT)
         // From some trigonometry, assuming we have a rectangular object (worst case), we need:
         width  = a * sin(pa) + b * fabs(cos(pa));
         height = a * fabs(cos(pa)) + b * sin(pa);
         // 'a' and 'b' are in arcminutes, so height and width are in arcminutes
 
         // Pad the RA and Dec, so that we show more of the sky than just the object.
         height += dss_padding;
         width += dss_padding;
     }
     else
     {
         // For a generic sky object, we don't know what to do. So
         // we just assume the default size.
         height = width = dss_default_size;
     }
     // There's no point in tiny DSS images that are smaller than dss_default_size
     if (height < dss_default_size)
         height = dss_default_size;
     if (width < dss_default_size)
         width = dss_default_size;
 
     return getDSSURL(p, width, height, version, md);
 }
 
 QString KSDssDownloader::getDSSURL(const SkyPoint *const p, float width, float height, const QString &version,
                                    struct KSDssImage::Metadata *md)
 {
     Q_ASSERT(p);
     if (!p)
         return QString();
     if (width <= 0)
         return QString();
     if (height <= 0)
         height = width;
     QString URL = getDSSURL(p->ra0(), p->dec0(), width, height, "gif", version, md);
     if (md)
     {
-        const SkyObject *obj = 0;
+        const SkyObject *obj = nullptr;
         obj                  = dynamic_cast<const SkyObject *>(p);
         if (obj && obj->hasName())
             md->object = obj->name();
     }
     return URL;
 }
 
 QString KSDssDownloader::getDSSURL(const dms &ra, const dms &dec, float width, float height, const QString &type_,
                                    const QString &version_, struct KSDssImage::Metadata *md)
 {
     const double dss_default_size = Options::defaultDSSImageSize();
 
     QString version   = version_.toLower();
     QString type      = type_.toLower();
     QString URLprefix = QString("http://archive.stsci.edu/cgi-bin/dss_search?v=%1&").arg(version);
     QString URLsuffix = QString("&e=J2000&f=%1&c=none&fov=NONE").arg(type);
 
     char decsgn = (dec.Degrees() < 0.0) ? '-' : '+';
     int dd      = abs(dec.degree());
     int dm      = abs(dec.arcmin());
     int ds      = abs(dec.arcsec());
 
     // Infinite and NaN sizes are replaced by the default size and tiny DSS images are resized to default size
     if (!qIsFinite(height) || height <= 0.0)
         height = dss_default_size;
     if (!qIsFinite(width) || width <= 0.0)
         width = dss_default_size;
 
     // DSS accepts images that are no larger than 75 arcminutes
     if (height > 75.0)
         height = 75.0;
     if (width > 75.0)
         width = 75.0;
 
     QString RAString, DecString, SizeString;
     DecString  = DecString.sprintf("&d=%c%02d+%02d+%02d", decsgn, dd, dm, ds);
     RAString   = RAString.sprintf("r=%02d+%02d+%02d", ra.hour(), ra.minute(), ra.second());
     SizeString = SizeString.sprintf("&h=%02.1f&w=%02.1f", height, width);
 
     if (md)
     {
         md->src     = KSDssImage::Metadata::DSS;
         md->width   = width;
         md->height  = height;
         md->ra0     = ra;
         md->dec0    = dec;
         md->version = version;
         md->format  = (type.contains("fit") ? KSDssImage::Metadata::FITS : KSDssImage::Metadata::GIF);
         md->height  = height;
         md->width   = width;
 
         if (version.contains("poss2"))
             md->gen = 2;
         else if (version.contains("poss1"))
             md->gen = 1;
         else if (version.contains("quickv"))
             md->gen = 4;
         else
             md->gen = -1;
 
         if (version.contains("red"))
             md->band = 'R';
         else if (version.contains("blue"))
             md->band = 'B';
         else if (version.contains("ir"))
             md->band = 'I';
         else if (version.contains("quickv"))
             md->band = 'V';
         else
             md->band = '?';
 
         md->object = QString();
     }
 
     return (URLprefix + RAString + DecString + SizeString + URLsuffix);
 }
 
 void KSDssDownloader::initiateSingleDownloadAttempt(QUrl srcUrl)
 {
     qDebug() << "Temp file is at " << m_TempFile.fileName();
     QUrl fileUrl = QUrl::fromLocalFile(m_TempFile.fileName());
     qDebug() << "Attempt #" << m_attempt << "downloading DSS Image. URL: " << srcUrl << " to " << fileUrl;
     //m_DownloadJob = KIO::copy( srcUrl, fileUrl, KIO::Overwrite ) ; // FIXME: Can be done with pure Qt
     //connect ( m_DownloadJob, SIGNAL ( result (KJob *) ), SLOT ( downloadAttemptFinished() ) );
 
     downloadJob = new FileDownloader();
 
     downloadJob->setProgressDialogEnabled(true, i18n("DSS Download"),
                                           i18n("Please wait while DSS image is being downloaded..."));
     connect(downloadJob, SIGNAL(canceled()), this, SIGNAL(downloadCanceled()));
     connect(downloadJob, SIGNAL(downloaded()), this, SLOT(downloadAttemptFinished()));
     connect(downloadJob, SIGNAL(error(QString)), this, SLOT(downloadError(QString)));
 
     downloadJob->get(srcUrl);
 }
 
 void KSDssDownloader::startDownload(const SkyPoint *const p, const QString &destFileName)
 {
     QUrl srcUrl;
     m_FileName = destFileName;
     m_attempt  = 0;
     srcUrl.setUrl(getDSSURL(p, m_VersionPreference[m_attempt], &m_AttemptData));
     initiateSingleDownloadAttempt(srcUrl);
 }
 
 void KSDssDownloader::startSingleDownload(const QUrl srcUrl, const QString &destFileName, KSDssImage::Metadata &md)
 {
     m_FileName   = destFileName;
     QUrl fileUrl = QUrl::fromLocalFile(m_TempFile.fileName());
     qDebug() << "Downloading DSS Image from URL: " << srcUrl << " to " << fileUrl;
     //m_DownloadJob = KIO::copy( srcUrl, fileUrl, KIO::Overwrite ) ; // FIXME: Can be done with pure Qt
     //connect ( m_DownloadJob, SIGNAL ( result (KJob *) ), SLOT ( singleDownloadFinished() ) );
 
     downloadJob = new FileDownloader();
 
     downloadJob->setProgressDialogEnabled(true, i18n("DSS Download"),
                                           i18n("Please wait while DSS image is being downloaded..."));
     connect(downloadJob, SIGNAL(canceled()), this, SIGNAL(downloadCanceled()));
     connect(downloadJob, SIGNAL(downloaded()), this, SLOT(singleDownloadFinished()));
     connect(downloadJob, SIGNAL(error(QString)), this, SLOT(downloadError(QString)));
 
     m_AttemptData = md;
 
     downloadJob->get(srcUrl);
 }
 
 void KSDssDownloader::downloadError(const QString &errorString)
 {
     qDebug() << "Error " << errorString << " downloading DSS images!";
     emit downloadComplete(false);
     downloadJob->deleteLater();
     return;
 }
 
 void KSDssDownloader::singleDownloadFinished()
 {
     m_TempFile.open();
     m_TempFile.write(downloadJob->downloadedData());
     m_TempFile.close();
     downloadJob->deleteLater();
 
     // Check if we have a proper DSS image or the DSS server failed
     QMimeDatabase mdb;
     QMimeType mt = mdb.mimeTypeForFile(m_TempFile.fileName(), QMimeDatabase::MatchContent);
     if (mt.name().contains("image", Qt::CaseInsensitive))
     {
         qDebug() << "DSS download was successful";
         emit downloadComplete(writeImageWithMetadata(m_TempFile.fileName(), m_FileName, m_AttemptData));
         return;
     }
     else
         emit downloadComplete(false);
 }
 
 void KSDssDownloader::downloadAttemptFinished()
 {
     if (m_AttemptData.src == KSDssImage::Metadata::SDSS)
     {
         // FIXME: do SDSS-y things
         emit downloadComplete(false);
         deleteLater();
         downloadJob->deleteLater();
         return;
     }
     else
     {
         m_TempFile.open();
         m_TempFile.write(downloadJob->downloadedData());
         m_TempFile.close();
         downloadJob->deleteLater();
 
         // Check if we have a proper DSS image or the DSS server failed
         QMimeDatabase mdb;
         QMimeType mt = mdb.mimeTypeForFile(m_TempFile.fileName(), QMimeDatabase::MatchContent);
         if (mt.name().contains("image", Qt::CaseInsensitive))
         {
             qDebug() << "DSS download was successful";
             emit downloadComplete(writeImageFile());
             deleteLater();
             return;
         }
 
         // We must have failed, try the next attempt
         QUrl srcUrl;
         m_attempt++;
         if (m_attempt == m_VersionPreference.count())
         {
             // Nothing downloaded... very strange. Fail.
             qDebug() << "Error downloading DSS images: All alternatives failed!";
             emit downloadComplete(false);
             deleteLater();
             return;
         }
         srcUrl.setUrl(getDSSURL(m_AttemptData.ra0, m_AttemptData.dec0, m_AttemptData.width, m_AttemptData.height,
                                 ((m_AttemptData.format == KSDssImage::Metadata::FITS) ? "fits" : "gif"),
                                 m_VersionPreference[m_attempt], &m_AttemptData));
         initiateSingleDownloadAttempt(srcUrl);
     }
 }
 
 bool KSDssDownloader::writeImageFile()
 {
     return writeImageWithMetadata(m_TempFile.fileName(), m_FileName, m_AttemptData);
 }
 
 bool KSDssDownloader::writeImageWithMetadata(const QString &srcFile, const QString &destFile,
                                              const KSDssImage::Metadata &md)
 {
     // Write the temporary file into an image file with metadata
     QImage img(srcFile);
     QImageWriter writer(destFile, "png");
 
     writer.setText("Calibrated",
                    "true");    // This means that the image has RA/Dec size and orientation that is calibrated
     writer.setText("PA", "0"); // Position Angle is zero degrees for DSS images
     writer.setText("Source", QString::number(KSDssImage::Metadata::DSS));
     writer.setText("Format", QString::number(KSDssImage::Metadata::PNG));
     writer.setText("Version", md.version);
     writer.setText("Object", md.object);
     writer.setText("RA", md.ra0.toHMSString(true));
     writer.setText("Dec", md.dec0.toDMSString(true, true));
     writer.setText("Width", QString::number(md.width));
     writer.setText("Height", QString::number(md.height));
     writer.setText("Band", QString() + md.band);
     writer.setText("Generation", QString::number(md.gen));
     writer.setText("Author", "KStars KSDssDownloader");
     return writer.write(img);
 }
diff --git a/kstars/auxiliary/ksdssdownloader.h b/kstars/auxiliary/ksdssdownloader.h
index 80e427e7b..7df96abb9 100644
--- a/kstars/auxiliary/ksdssdownloader.h
+++ b/kstars/auxiliary/ksdssdownloader.h
@@ -1,134 +1,134 @@
 /***************************************************************************
                    ksdssdownloader.h  -  K Desktop Planetarium
                              -------------------
     begin                : Tue 05 Jan 2016 03:22:50 CST
     copyright            : (c) 2016 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
 ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "ksdssimage.h"
 
 #include <QObject>
 #include <QString>
 #include <QStringList>
 #include <QTemporaryFile>
 #include <QUrl>
 
 #include <functional>
 
 class FileDownloader;
 class SkyPoint;
 class dms;
 
 /**
  * @class KSDssDownloader
  * @short Helps download a DSS image
  * @author Akarsh Simha <akarsh.simha@kdemail.net>
  *
  * @note This object is designed to commit suicide (calls
  * QObject::deleteLater() )! Never allocate this using anything but
  * new -- do not allocate it on the stack! This is ideal for its
  * operation, as it deletes itself after downloading.
  */
 
 class KSDssDownloader : public QObject
 {
     Q_OBJECT
 
   public:
     /** @short Constructor */
-    explicit KSDssDownloader(QObject *parent = 0);
+    explicit KSDssDownloader(QObject *parent = nullptr);
 
     /**
      * @short Constructor that initiates a "standard" DSS download job, calls the downloadReady slot, and finally self destructs
      * @note Very important that if you create with this constructor,
      * the object will self-destruct. Avoid keeping pointers to it, or
      * things may segfault!
      */
     KSDssDownloader(const SkyPoint *const p, const QString &destFileName,
-                    const std::function<void(bool)> &slotDownloadReady, QObject *parent = 0);
+                    const std::function<void(bool)> &slotDownloadReady, QObject *parent = nullptr);
 
     /**
      * @short Stateful single-download of a supplied URL. Use when the flexibility is required
      * @note Does not self-delete this object. Construct with default constructor, and delete as usual.
      * @param srcUrl source DSS URL to download
      * @param destFileName destination image file (will be of PNG format)
      * @param md DSS image metadata to write into image file
      * @note emits downloadComplete with success state when done
      */
     void startSingleDownload(const QUrl srcUrl, const QString &destFileName, KSDssImage::Metadata &md);
 
     /**
      * @short High-level method to create a URL to obtain a DSS image for a given SkyPoint
      * @note If SkyPoint is a DeepSkyObject, this method automatically
      * decides the image size required to fit the object.
      * @note Moved from namespace KSUtils (--asimha, Jan 5 2016)
      */
     static QString getDSSURL(const SkyPoint *const p, const QString &version = "all",
-                             struct KSDssImage::Metadata *md = 0);
+                             struct KSDssImage::Metadata *md = nullptr);
 
     /**
      * @short High-level method to create a URL to obtain a DSS image for a given SkyPoint
      * @note This method includes an option to set the height, but uses default values for many parameters
      */
     static QString getDSSURL(const SkyPoint *const p, float width, float height = 0, const QString &version = "all",
-                             struct KSDssImage::Metadata *md = 0);
+                             struct KSDssImage::Metadata *md = nullptr);
 
     /**
      * @short Create a URL to obtain a DSS image for a given RA, Dec
      * @param RA The J2000.0 Right Ascension of the point
      * @param Dec The J2000.0 Declination of the point
      * @param width The width of the image in arcminutes
      * @param height The height of the image in arcminutes
      * @param version string describing which version to get
      * @param type The image type, either gif or fits.
      * @param md If a valid pointer is provided, fill with metadata
      * @note This method resets height and width to fall within the range accepted by DSS
      * @note Moved from namespace KSUtils (--asimha, Jan 5 2016)
      *
      * @note Valid versions are: dss1, poss2ukstu_red, poss2ukstu_ir,
      * poss2ukstu_blue, poss1_blue, poss1_red, all, quickv,
      * phase2_gsc2, phase2_gsc1. Of these, dss1 uses POSS1 Red in the
      * north and POSS2/UKSTU Blue in the south. all uses the best of a
      * combined list of all plates.
      *
      */
     static QString getDSSURL(const dms &ra, const dms &dec, float width = 0, float height = 0,
                              const QString &type_ = "gif", const QString &version_ = "all",
-                             struct KSDssImage::Metadata *md = 0);
+                             struct KSDssImage::Metadata *md = nullptr);
 
     /** @short Write image metadata into file */
     static bool writeImageWithMetadata(const QString &srcFile, const QString &destFile, const KSDssImage::Metadata &md);
 
   signals:
     void downloadComplete(bool success);
     void downloadCanceled();
 
   private slots:
     void downloadAttemptFinished();
     void singleDownloadFinished();
     void downloadError(const QString &errorString);
 
   private:
     void startDownload(const SkyPoint *const p, const QString &destFileName);
     void initiateSingleDownloadAttempt(QUrl srcUrl);
     bool writeImageFile();
 
     QStringList m_VersionPreference;
     int m_attempt { 0 };
     struct KSDssImage::Metadata m_AttemptData;
     QString m_FileName;
     QTemporaryFile m_TempFile;
     FileDownloader *downloadJob { nullptr };
 };
diff --git a/kstars/auxiliary/ksnotification.cpp b/kstars/auxiliary/ksnotification.cpp
index 7f8cbfc85..b1a2dbdb2 100644
--- a/kstars/auxiliary/ksnotification.cpp
+++ b/kstars/auxiliary/ksnotification.cpp
@@ -1,68 +1,68 @@
 /*  General KStars Notifications for desktop and lite version
     Copyright (C) 2016 Jasem Mutlaq (mutlaqja@ikarustech.com)
 
     This application is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
 */
 
 #include "ksnotification.h"
 
 #ifdef KSTARS_LITE
 #include "kstarslite.h"
 #else
 #include <QPointer>
 #include <KMessageBox>
 #endif
 
 namespace KSNotification
 {
 void error(const QString &message, const QString &title)
 {
 #ifdef KSTARS_LITE
     Q_UNUSED(title);
     KStarsLite::Instance()->notificationMessage(message);
 #else
-    KMessageBox::error(0, message, title);
+    KMessageBox::error(nullptr, message, title);
 #endif
 }
 
 void sorry(const QString &message, const QString &title)
 {
 #ifdef KSTARS_LITE
     Q_UNUSED(title);
     KStarsLite::Instance()->notificationMessage(message);
 #else
-    KMessageBox::sorry(0, message, title);
+    KMessageBox::sorry(nullptr, message, title);
 #endif
 }
 
 void info(const QString &message, const QString &title)
 {
 #ifdef KSTARS_LITE
     Q_UNUSED(title);
     KStarsLite::Instance()->notificationMessage(message);
 #else
-    KMessageBox::information(0, message, title);
+    KMessageBox::information(nullptr, message, title);
 #endif
 }
 
 void transient(const QString &message, const QString &title)
 {
 #ifdef KSTARS_LITE
     Q_UNUSED(title);
     KStarsLite::Instance()->notificationMessage(message);
 #else
     QPointer<QMessageBox> msgBox = new QMessageBox();
     msgBox->setAttribute(Qt::WA_DeleteOnClose);
     msgBox->setWindowTitle(title);
     msgBox->setText(message);
     msgBox->setModal(false);
     msgBox->setIcon(QMessageBox::Warning);
     msgBox->show();
 #endif
 }
 
 }
diff --git a/kstars/auxiliary/ksuserdb.cpp b/kstars/auxiliary/ksuserdb.cpp
index aebc2c6de..dc4b15ff3 100644
--- a/kstars/auxiliary/ksuserdb.cpp
+++ b/kstars/auxiliary/ksuserdb.cpp
@@ -1,1825 +1,1825 @@
 /***************************************************************************
                           ksuserdb.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Wed May 2 2012
     copyright            : (C) 2012 by Rishab Arora
     email                : ra.rishab@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "ksuserdb.h"
 
 #include "artificialhorizoncomponent.h"
 #include "kspaths.h"
 #include "kstarsdata.h"
 #include "linelist.h"
 #include "version.h"
 
 #include <QSqlQuery>
 #include <QSqlRecord>
 #include <QSqlTableModel>
 
 #include <kstars_debug.h>
 
 /*
  * TODO (spacetime):
  * The database supports storing logs. But it needs to be implemented.
  *
  * One of the unresolved problems was the creation of a unique identifier
  * for each object (DSO,planet,star etc) for use in the database.
 */
 
 KSUserDB::~KSUserDB()
 {
     userdb_.close();
 }
 
 bool KSUserDB::Initialize()
 {
     // Every logged in user has their own db.
     userdb_        = QSqlDatabase::addDatabase("QSQLITE", "userdb");
     QString dbfile = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "userdb.sqlite";
     QFile testdb(dbfile);
     bool first_run = false;
     if (!testdb.exists())
     {
         qCInfo(KSTARS) << "User DB does not exist. New User DB will be created.";
         first_run = true;
     }
     userdb_.setDatabaseName(dbfile);
     if (!userdb_.open())
     {
         qCWarning(KSTARS) << "Unable to open user database file.";
         qCritical(KSTARS) << LastError();
         return false;
     }
     else
     {
         qCDebug(KSTARS) << "Opened the User DB. Ready.";
         if (first_run == true)
             FirstRun();
         else
         {
             // Update table if previous version exists
-            QSqlTableModel version(0, userdb_);
+            QSqlTableModel version(nullptr, userdb_);
             version.setTable("Version");
             version.select();
             QSqlRecord record = version.record(0);
             version.clear();
 
             QString currentDBVersion = record.value("Version").toString();
 
             // Update database version to current KStars version
             if (currentDBVersion != KSTARS_VERSION)
             {
                 QSqlQuery query(userdb_);
                 QString versionQuery = QString("UPDATE Version SET Version='%1'").arg(KSTARS_VERSION);
                 if (!query.exec(versionQuery))
                     qCWarning(KSTARS) << query.lastError();
             }
 
             // If prior to 2.4.0 upgrade database for horizon table
             if (currentDBVersion < "2.4.0")
             {
                 QSqlQuery query(userdb_);
                 if (!query.exec("CREATE TABLE IF NOT EXISTS horizons (id INTEGER DEFAULT NULL PRIMARY KEY "
                                 "AUTOINCREMENT, name TEXT NOT NULL, label TEXT NOT NULL, enabled INTEGER NOT NULL)"))
                     qCWarning(KSTARS) << query.lastError();
             }
 
             // If prior to 2.6.0 upgrade database for profiles tables
             if (currentDBVersion < "2.6.0")
             {
                 QSqlQuery query(userdb_);
                 QString versionQuery = QString("UPDATE Version SET Version='%1'").arg(KSTARS_VERSION);
 
                 if (!query.exec(versionQuery))
                     qCWarning(KSTARS) << query.lastError();
 
                 // Profiles
                 if (!query.exec("CREATE TABLE IF NOT EXISTS profile (id INTEGER DEFAULT NULL PRIMARY KEY "
                                 "AUTOINCREMENT, name TEXT NOT NULL, host TEXT, port INTEGER, city TEXT, province TEXT, "
                                 "country TEXT, indiwebmanagerport INTEGER DEFAULT NULL)"))
                     qCWarning(KSTARS) << query.lastError();
 
                 // Drivers
                 if (!query.exec("CREATE TABLE IF NOT EXISTS driver (id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                                 "label TEXT NOT NULL, role TEXT NOT NULL, profile INTEGER NOT NULL, FOREIGN "
                                 "KEY(profile) REFERENCES profile(id))"))
                     qCWarning(KSTARS) << query.lastError();
 
 // Custom Drivers
 //if (!query.exec("CREATE TABLE IF NOT EXISTS custom_driver (id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, drivers TEXT NOT NULL, profile INTEGER NOT NULL, FOREIGN KEY(profile) REFERENCES profile(id))"))
 //qDebug() << query.lastError();
 
 // Add sample profile
 #ifdef Q_OS_WIN
                 if (!query.exec("INSERT INTO profile (name, host, port) VALUES ('Simulators', 'localhost', 7624)"))
                     qDebug() << query.lastError();
 #else
                 if (!query.exec("INSERT INTO profile (name) VALUES ('Simulators')"))
                     qCWarning(KSTARS) << query.lastError();
 #endif
 
                 // Add sample profile drivers
                 if (!query.exec("INSERT INTO driver (label, role, profile) VALUES ('Telescope Simulator', 'Mount', 1)"))
                     qCWarning(KSTARS) << query.lastError();
                 if (!query.exec("INSERT INTO driver (label, role, profile) VALUES ('CCD Simulator', 'CCD', 1)"))
                     qCWarning(KSTARS) << query.lastError();
                 if (!query.exec("INSERT INTO driver (label, role, profile) VALUES ('Focuser Simulator', 'Focuser', 1)"))
                     qCWarning(KSTARS) << query.lastError();
             }
 
             // If prior to 2.6.1 upgrade database for dark library tables
             if (currentDBVersion < "2.6.1")
             {
                 QSqlQuery query(userdb_);
                 QString versionQuery = QString("UPDATE Version SET Version='%1'").arg(KSTARS_VERSION);
 
                 if (!query.exec(versionQuery))
                     qCWarning(KSTARS) << query.lastError();
 
                 // Dark Frame
                 if (!query.exec("CREATE TABLE IF NOT EXISTS darkframe (id INTEGER DEFAULT NULL PRIMARY KEY "
                                 "AUTOINCREMENT, ccd TEXT NOT NULL, chip INTEGER DEFAULT 0, binX INTEGER, binY INTEGER, "
                                 "temperature REAL, duration REAL, filename TEXT NOT NULL, timestamp DATETIME DEFAULT "
                                 "CURRENT_TIMESTAMP)"))
                     qCWarning(KSTARS) << query.lastError();
             }
 
             // If prior to 2.7.3 upgrade database to add column for focus offset
             if (currentDBVersion < "2.7.3")
             {
                 QSqlQuery query(userdb_);
                 QString columnQuery = QString("ALTER TABLE filter ADD COLUMN Offset TEXT");
 
                 query.exec(columnQuery);
             }
 
             // If prior to 2.7.5 upgrade database to add column for autoconnect
             if (currentDBVersion < "2.7.5")
             {
                 QSqlQuery query(userdb_);
                 QString columnQuery = QString("ALTER TABLE profile ADD COLUMN autoconnect INTEGER");
 
                 query.exec(columnQuery);
             }
 
             // If prior to 2.7.6 upgrade database to add column for filter exposure
             if (currentDBVersion < "2.7.6")
             {
                 QSqlQuery query(userdb_);
                 QString columnQuery = QString("ALTER TABLE filter ADD COLUMN Exposure TEXT DEFAULT '1'");
 
                 query.exec(columnQuery);
             }
 
             // If prior to 2.7.9 upgrade database to add guider app selection
             if (currentDBVersion < "2.7.9")
             {
                 QSqlQuery query(userdb_);
                 QString columnQuery = QString("ALTER TABLE profile ADD COLUMN guidertype INTEGER DEFAULT 0");
                 query.exec(columnQuery);
                 columnQuery = QString("ALTER TABLE profile ADD COLUMN guiderhost TEXT");
                 query.exec(columnQuery);
                 columnQuery = QString("ALTER TABLE profile ADD COLUMN guiderport INTEGER");
                 query.exec(columnQuery);
             }
 
             // If prior to 2.8.0 upgrade database to add telescope selection
             if (currentDBVersion < "2.8.0")
             {
                 QSqlQuery query(userdb_);
                 QString columnQuery = QString("ALTER TABLE profile ADD COLUMN primaryscope INTEGER DEFAULT 0");
                 query.exec(columnQuery);
                 columnQuery = QString("ALTER TABLE profile ADD COLUMN guidescope INTEGER DEFAULT 0");
                 query.exec(columnQuery);
             }
 
             // If prior to 2.8.2 upgrade database to add HIPS sources
             if (currentDBVersion < "2.8.2")
             {
                 // To get all lists
                 // http://alasky.unistra.fr/MocServer/query?hips_service_url=*&dataproduct_type=!catalog&dataproduct_type=!cube&&moc_sky_fraction=1&get=record
                 QSqlQuery query(userdb_);
                 query.exec("DROP TABLE hips");
                 if (!query.exec("CREATE TABLE hips (ID TEXT NOT NULL UNIQUE,"
                                 "obs_title TEXT NOT NULL, obs_description TEXT NOT NULL, hips_order TEXT NOT NULL,"
                                 "hips_frame TEXT NOT NULL, hips_tile_width TEXT NOT NULL, hips_tile_format TEXT NOT NULL,"
                                 "hips_service_url TEXT NOT NULL, moc_sky_fraction TEXT NOT NULL)"))
                     qCWarning(KSTARS) << query.lastError();
                 // Add default data
                 else
                 {
                     if (!query.exec("INSERT INTO hips (ID, obs_title, obs_description, hips_order, hips_frame, hips_tile_width, hips_tile_format, hips_service_url, moc_sky_fraction)"
                                     "VALUES ('CDS/P/DSS2/color', 'DSS colored', 'Color composition generated by CDS. This HiPS survey is based on 2 others HiPS surveys,"
                                     " respectively DSS2-red and DSS2-blue HiPS, both of them directly generated from original scanned plates downloaded"
                                     " from STScI site. The red component has been built from POSS-II F, AAO-SES,SR and SERC-ER plates. The blue component"
                                     " has been build from POSS-II J and SERC-J,EJ. The green component is based on the mean of other components. Three"
                                     " missing plates from red survey (253, 260, 359) has been replaced by pixels from the DSSColor STScI jpeg survey."
                                     " The 11 missing blue plates (mainly in galactic plane) have not been replaced (only red component).',"
                                     "'9', 'equatorial', '512', 'jpeg fits', 'http://alasky.u-strasbg.fr/DSS/DSSColor','1')"))
                         qCWarning(KSTARS) << query.lastError();
 
                     if (!query.exec("INSERT INTO hips (ID, obs_title, obs_description, hips_order, hips_frame, hips_tile_width, hips_tile_format, hips_service_url, moc_sky_fraction)"
                                     "VALUES ('CDS/P/2MASS/color', '2MASS color J (1.23 microns), H (1.66 microns), K (2.16 microns)',"
                                     "'2MASS has uniformly scanned the entire sky in three near-infrared bands to detect and characterize point sources"
                                     " brighter than about 1 mJy in each band, with signal-to-noise ratio (SNR) greater than 10, using a pixel size of"
                                     " 2.0\". This has achieved an 80,000-fold improvement in sensitivity relative to earlier surveys. 2MASS used two"
                                     " highly-automated 1.3-m telescopes, one at Mt. Hopkins, AZ, and one at CTIO, Chile. Each telescope was equipped with"
                                     " a three-channel camera, each channel consisting of a 256x256 array of HgCdTe detectors, capable of observing the"
                                     " sky simultaneously at J (1.25 microns), H (1.65 microns), and Ks (2.17 microns). The University of Massachusetts"
                                     " (UMass) was responsible for the overall management of the project, and for developing the infrared cameras and"
                                     " on-site computing systems at both facilities. The Infrared Processing and Analysis Center (IPAC) is responsible"
                                     " for all data processing through the Production Pipeline, and construction and distribution of the data products."
                                     " Funding is provided primarily by NASA and the NSF',"
                                     "'9', 'equatorial', '512', 'jpeg fits', 'http://alaskybis.u-strasbg.fr/2MASS/Color', '1')"))
                         qCWarning(KSTARS) << query.lastError();
 
                     if (!query.exec("INSERT INTO hips (ID, obs_title, obs_description, hips_order, hips_frame, hips_tile_width, hips_tile_format, hips_service_url, moc_sky_fraction)"
                                     "VALUES ('CDS/P/Fermi/color', 'Fermi Color HEALPix survey', 'Launched on June 11, 2008, the Fermi Gamma-ray Space Telescope observes the cosmos using the"
                                     " highest-energy form of light. This survey sums all data observed by the Fermi mission up to week 396. This version"
                                     " of the Fermi survey are intensity maps where the summed counts maps are divided by the exposure for each pixel"
                                     ". We anticipate using the HEASARC Hera capabilities to update this survey on a roughly quarterly basis. Data is"
                                     " broken into 5 energy bands : 30-100 MeV Band 1, 100-300 MeV Band 2, 300-1000 MeV Band 3, 1-3 GeV Band 4 ,"
                                     " 3-300 GeV Band 5. The SkyView data are based upon a Cartesian projection of the counts divided by the exposure maps."
                                     " In the Cartesian projection pixels near the pole have a much smaller area than pixels on the equator, so these"
                                     " pixels have smaller integrated flux. When creating large scale images in other projections users may wish to make"
                                     " sure to compensate for this effect the flux conserving clip-resampling option.', '9', 'equatorial', '512', 'jpeg fits',"
                                     "'http://alaskybis.u-strasbg.fr/Fermi/Color', '1')"))
                         qCWarning(KSTARS) << query.lastError();
                 }
             }
 
             // If prior to 2.8.3 drop filters if invalid
             if (currentDBVersion < "2.8.3")
             {
                 QSqlQuery query(userdb_);
                 if (!query.exec("PRAGMA table_info(filter)"))
                     qCWarning(KSTARS) << query.lastError();
                 else
                 {
                     bool validTable = false;
                     while (query.next())
                     {
                         if (query.value(1) == "Exposure")
                         {
                             validTable = true;
                             break;
                         }
                     }
 
                     if (validTable == false)
                     {
                         qCWarning(KSTARS) << "Detected invalid filter table, re-creating...";
                         if (!query.exec("DROP table filter"))
                             qCWarning(KSTARS) << query.lastError();
                         if (!query.exec("CREATE TABLE filter ( "
                                    "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                                    "Vendor TEXT DEFAULT NULL, "
                                    "Model TEXT DEFAULT NULL, "
                                    "Type TEXT DEFAULT NULL, "
                                    "Offset TEXT DEFAULT NULL, "
                                    "Color TEXT DEFAULT NULL,"
                                    "Exposure TEXT DEFAULT '1')"))
                             qCWarning(KSTARS) << query.lastError();
                     }
                 }
             }
 
         }
     }
     userdb_.close();
     return true;
 }
 
 QSqlError KSUserDB::LastError()
 {
     // error description is in QSqlError::text()
     return userdb_.lastError();
 }
 
 bool KSUserDB::FirstRun()
 {
     if (!RebuildDB())
         return false;
 
     /*ImportFlags();
     ImportUsers();
     ImportEquipment();*/
 
     return true;
 }
 
 bool KSUserDB::RebuildDB()
 {
     qCInfo(KSTARS) << "Rebuilding User Database";
 
     QVector<QString> tables;
     tables.append("CREATE TABLE Version ("
                   "Version CHAR DEFAULT NULL)");
     tables.append("INSERT INTO Version VALUES (\"" KSTARS_VERSION "\")");
     tables.append("CREATE TABLE user ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "Name TEXT NOT NULL  DEFAULT 'NULL', "
                   "Surname TEXT NOT NULL  DEFAULT 'NULL', "
                   "Contact TEXT DEFAULT NULL)");
 
     tables.append("CREATE TABLE telescope ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "Vendor TEXT DEFAULT NULL, "
                   "Aperture REAL NOT NULL  DEFAULT NULL, "
                   "Model TEXT DEFAULT NULL, "
                   "Driver TEXT DEFAULT NULL, "
                   "Type TEXT DEFAULT NULL, "
                   "FocalLength REAL DEFAULT NULL)");
 
     tables.append("CREATE TABLE flags ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "RA TEXT NOT NULL  DEFAULT NULL, "
                   "Dec TEXT NOT NULL  DEFAULT NULL, "
                   "Icon TEXT NOT NULL  DEFAULT 'NULL', "
                   "Label TEXT NOT NULL  DEFAULT 'NULL', "
                   "Color TEXT DEFAULT NULL, "
                   "Epoch TEXT DEFAULT NULL)");
 
     tables.append("CREATE TABLE lens ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "Vendor TEXT NOT NULL  DEFAULT 'NULL', "
                   "Model TEXT DEFAULT NULL, "
                   "Factor REAL NOT NULL  DEFAULT NULL)");
 
     tables.append("CREATE TABLE eyepiece ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "Vendor TEXT DEFAULT NULL, "
                   "Model TEXT DEFAULT NULL, "
                   "FocalLength REAL NOT NULL  DEFAULT NULL, "
                   "ApparentFOV REAL NOT NULL  DEFAULT NULL, "
                   "FOVUnit TEXT NOT NULL  DEFAULT NULL)");
 
     tables.append("CREATE TABLE filter ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "Vendor TEXT DEFAULT NULL, "
                   "Model TEXT DEFAULT NULL, "
                   "Type TEXT DEFAULT NULL, "
                   "Offset TEXT DEFAULT NULL, "
                   "Color TEXT DEFAULT NULL,"
                   "Exposure TEXT DEFAULT '1')");
 
     tables.append("CREATE TABLE wishlist ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "Date NUMERIC NOT NULL  DEFAULT NULL, "
                   "Type TEXT DEFAULT NULL, "
                   "UIUD TEXT DEFAULT NULL)");
 
     tables.append("CREATE TABLE fov ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "name TEXT NOT NULL  DEFAULT 'NULL', "
                   "color TEXT DEFAULT NULL, "
                   "sizeX NUMERIC DEFAULT NULL, "
                   "sizeY NUMERIC DEFAULT NULL, "
                   "shape TEXT DEFAULT NULL)");
 
     tables.append("CREATE TABLE logentry ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "content TEXT NOT NULL  DEFAULT 'NULL', "
                   "UIUD TEXT DEFAULT NULL, "
                   "DateTime NUMERIC NOT NULL  DEFAULT NULL, "
                   "User INTEGER DEFAULT NULL REFERENCES user (id), "
                   "Location TEXT DEFAULT NULL, "
                   "Telescope INTEGER DEFAULT NULL REFERENCES telescope (id),"
                   "Filter INTEGER DEFAULT NULL REFERENCES filter (id), "
                   "lens INTEGER DEFAULT NULL REFERENCES lens (id), "
                   "Eyepiece INTEGER DEFAULT NULL REFERENCES eyepiece (id), "
                   "FOV INTEGER DEFAULT NULL REFERENCES fov (id))");
 
     tables.append("CREATE TABLE horizons ( "
                   "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                   "name TEXT NOT NULL,"
                   "label TEXT NOT NULL,"
                   "enabled INTEGER NOT NULL)");
 
     tables.append("CREATE TABLE profile (id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, host "
                   "TEXT, port INTEGER, city TEXT, province TEXT, country TEXT, indiwebmanagerport INTEGER DEFAULT "
                   "NULL, autoconnect INTEGER DEFAULT 1, guidertype INTEGER DEFAULT 0, guiderhost TEXT, guiderport INTEGER, primaryscope INTEGER DEFAULT 0, guidescope INTEGER DEFAULT 0)");
     tables.append("CREATE TABLE driver (id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, label TEXT NOT NULL, role "
                   "TEXT NOT NULL, profile INTEGER NOT NULL, FOREIGN KEY(profile) REFERENCES profile(id))");
 //tables.append("CREATE TABLE custom_driver (id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, drivers TEXT NOT NULL, profile INTEGER NOT NULL, FOREIGN KEY(profile) REFERENCES profile(id))");
 
 #ifdef Q_OS_WIN
     tables.append("INSERT INTO profile (name, host, port) VALUES ('Simulators', 'localhost', 7624)");
 #else
     tables.append("INSERT INTO profile (name) VALUES ('Simulators')");
 #endif
 
     tables.append("INSERT INTO driver (label, role, profile) VALUES ('Telescope Simulator', 'Mount', 1)");
     tables.append("INSERT INTO driver (label, role, profile) VALUES ('CCD Simulator', 'CCD', 1)");
     tables.append("INSERT INTO driver (label, role, profile) VALUES ('Focuser Simulator', 'Focuser', 1)");
 
     tables.append("CREATE TABLE IF NOT EXISTS darkframe (id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, ccd TEXT "
                   "NOT NULL, chip INTEGER DEFAULT 0, binX INTEGER, binY INTEGER, temperature REAL, duration REAL, "
                   "filename TEXT NOT NULL, timestamp DATETIME DEFAULT CURRENT_TIMESTAMP)");
 
     tables.append("CREATE TABLE IF NOT EXISTS hips (ID TEXT NOT NULL UNIQUE,"
                   "obs_title TEXT NOT NULL, obs_description TEXT NOT NULL, hips_order TEXT NOT NULL,"
                   "hips_frame TEXT NOT NULL, hips_tile_width TEXT NOT NULL, hips_tile_format TEXT NOT NULL,"
                   "hips_service_url TEXT NOT NULL, moc_sky_fraction TEXT NOT NULL)");
 
     tables.append("INSERT INTO hips (ID, obs_title, obs_description, hips_order, hips_frame, hips_tile_width, hips_tile_format, hips_service_url, moc_sky_fraction)"
                   "VALUES ('CDS/P/DSS2/color', 'DSS colored', 'Color composition generated by CDS. This HiPS survey is based on 2 others HiPS surveys,"
                   " respectively DSS2-red and DSS2-blue HiPS, both of them directly generated from original scanned plates downloaded"
                   " from STScI site. The red component has been built from POSS-II F, AAO-SES,SR and SERC-ER plates. The blue component"
                   " has been build from POSS-II J and SERC-J,EJ. The green component is based on the mean of other components. Three"
                   " missing plates from red survey (253, 260, 359) has been replaced by pixels from the DSSColor STScI jpeg survey."
                   " The 11 missing blue plates (mainly in galactic plane) have not been replaced (only red component).',"
                   "'9', 'equatorial', '512', 'jpeg fits', 'http://alasky.u-strasbg.fr/DSS/DSSColor','1')");
 
     tables.append("INSERT INTO hips (ID, obs_title, obs_description, hips_order, hips_frame, hips_tile_width, hips_tile_format, hips_service_url, moc_sky_fraction)"
                   "VALUES ('CDS/P/2MASS/color', '2MASS color J (1.23 microns), H (1.66 microns), K (2.16 microns)',"
                   "'2MASS has uniformly scanned the entire sky in three near-infrared bands to detect and characterize point sources"
                   " brighter than about 1 mJy in each band, with signal-to-noise ratio (SNR) greater than 10, using a pixel size of"
                   " 2.0\". This has achieved an 80,000-fold improvement in sensitivity relative to earlier surveys. 2MASS used two"
                   " highly-automated 1.3-m telescopes, one at Mt. Hopkins, AZ, and one at CTIO, Chile. Each telescope was equipped with"
                   " a three-channel camera, each channel consisting of a 256x256 array of HgCdTe detectors, capable of observing the"
                   " sky simultaneously at J (1.25 microns), H (1.65 microns), and Ks (2.17 microns). The University of Massachusetts"
                   " (UMass) was responsible for the overall management of the project, and for developing the infrared cameras and"
                   " on-site computing systems at both facilities. The Infrared Processing and Analysis Center (IPAC) is responsible"
                   " for all data processing through the Production Pipeline, and construction and distribution of the data products."
                   " Funding is provided primarily by NASA and the NSF',"
                   "'9', 'equatorial', '512', 'jpeg fits', 'http://alaskybis.u-strasbg.fr/2MASS/Color', '1')");
 
     tables.append("INSERT INTO hips (ID, obs_title, obs_description, hips_order, hips_frame, hips_tile_width, hips_tile_format, hips_service_url, moc_sky_fraction)"
                   "VALUES ('CDS/P/Fermi/color', 'Fermi Color HEALPix survey', 'Launched on June 11, 2008, the Fermi Gamma-ray Space Telescope observes the cosmos using the"
                   " highest-energy form of light. This survey sums all data observed by the Fermi mission up to week 396. This version"
                   " of the Fermi survey are intensity maps where the summed counts maps are divided by the exposure for each pixel"
                   ". We anticipate using the HEASARC Hera capabilities to update this survey on a roughly quarterly basis. Data is"
                   " broken into 5 energy bands : 30-100 MeV Band 1, 100-300 MeV Band 2, 300-1000 MeV Band 3, 1-3 GeV Band 4 ,"
                   " 3-300 GeV Band 5. The SkyView data are based upon a Cartesian projection of the counts divided by the exposure maps."
                   " In the Cartesian projection pixels near the pole have a much smaller area than pixels on the equator, so these"
                   " pixels have smaller integrated flux. When creating large scale images in other projections users may wish to make"
                   " sure to compensate for this effect the flux conserving clip-resampling option.', '9', 'equatorial', '512', 'jpeg fits',"
                   "'http://alaskybis.u-strasbg.fr/Fermi/Color', '1')");
 
     for (int i = 0; i < tables.count(); ++i)
     {
         QSqlQuery query(userdb_);
         if (!query.exec(tables[i]))
         {
             qCDebug(KSTARS) << query.lastError();
             qCDebug(KSTARS) << query.executedQuery();
         }
     }
 
     return true;
 }
 
 /*
  * Observer Section
 */
 void KSUserDB::AddObserver(const QString &name, const QString &surname, const QString &contact)
 {
     userdb_.open();
-    QSqlTableModel users(0, userdb_);
+    QSqlTableModel users(nullptr, userdb_);
     users.setTable("user");
     users.setFilter("Name LIKE \'" + name + "\' AND Surname LIKE \'" + surname + "\'");
     users.select();
 
     if (users.rowCount() > 0)
     {
         QSqlRecord record = users.record(0);
         record.setValue("Name", name);
         record.setValue("Surname", surname);
         record.setValue("Contact", contact);
         users.setRecord(0, record);
         users.submitAll();
     }
     else
     {
         int row = 0;
         users.insertRows(row, 1);
         users.setData(users.index(row, 1), name); // row0 is autoincerement ID
         users.setData(users.index(row, 2), surname);
         users.setData(users.index(row, 3), contact);
         users.submitAll();
     }
 
     userdb_.close();
 }
 
 bool KSUserDB::FindObserver(const QString &name, const QString &surname)
 {
     userdb_.open();
-    QSqlTableModel users(0, userdb_);
+    QSqlTableModel users(nullptr, userdb_);
     users.setTable("user");
     users.setFilter("Name LIKE \'" + name + "\' AND Surname LIKE \'" + surname + "\'");
     users.select();
 
     int observer_count = users.rowCount();
 
     users.clear();
     userdb_.close();
     return (observer_count > 0);
 }
 
 // TODO(spacetime): This method is currently unused.
 bool KSUserDB::DeleteObserver(const QString &id)
 {
     userdb_.open();
-    QSqlTableModel users(0, userdb_);
+    QSqlTableModel users(nullptr, userdb_);
     users.setTable("user");
     users.setFilter("id = \'" + id + "\'");
     users.select();
 
     users.removeRows(0, 1);
     users.submitAll();
 
     int observer_count = users.rowCount();
 
     users.clear();
     userdb_.close();
     return (observer_count > 0);
 }
 QSqlDatabase KSUserDB::GetDatabase()
 {
     userdb_.open();
     return userdb_;
 }
 #ifndef KSTARS_LITE
 void KSUserDB::GetAllObservers(QList<Observer *> &observer_list)
 {
     userdb_.open();
     observer_list.clear();
-    QSqlTableModel users(0, userdb_);
+    QSqlTableModel users(nullptr, userdb_);
     users.setTable("user");
     users.select();
 
     for (int i = 0; i < users.rowCount(); ++i)
     {
         QSqlRecord record = users.record(i);
         QString id        = record.value("id").toString();
         QString name      = record.value("Name").toString();
         QString surname   = record.value("Surname").toString();
         QString contact   = record.value("Contact").toString();
         OAL::Observer *o  = new OAL::Observer(id, name, surname, contact);
         observer_list.append(o);
     }
 
     users.clear();
     userdb_.close();
 }
 #endif
 
 /* Dark Library Section */
 
 void KSUserDB::AddDarkFrame(const QVariantMap &oneFrame)
 {
     userdb_.open();
-    QSqlTableModel darkframe(0, userdb_);
+    QSqlTableModel darkframe(nullptr, userdb_);
     darkframe.setTable("darkframe");
     darkframe.select();
 
     QSqlRecord record = darkframe.record();
 
     // Remove PK so that it gets auto-incremented later
     record.remove(0);
     // Remove timestamp so that it gets auto-generated
     record.remove(7);
 
     for (QVariantMap::const_iterator iter = oneFrame.begin(); iter != oneFrame.end(); ++iter)
         record.setValue(iter.key(), iter.value());
 
     darkframe.insertRecord(-1, record);
 
     darkframe.submitAll();
 
     userdb_.close();
 }
 
 bool KSUserDB::DeleteDarkFrame(const QString &filename)
 {
     userdb_.open();
-    QSqlTableModel darkframe(0, userdb_);
+    QSqlTableModel darkframe(nullptr, userdb_);
     darkframe.setTable("darkframe");
     darkframe.setFilter("filename = \'" + filename + "\'");
 
     darkframe.select();
 
     darkframe.removeRows(0, 1);
     darkframe.submitAll();
 
     userdb_.close();
 
     return true;
 }
 
 void KSUserDB::GetAllDarkFrames(QList<QVariantMap> &darkFrames)
 {
     darkFrames.clear();
 
     userdb_.open();
-    QSqlTableModel darkframe(0, userdb_);
+    QSqlTableModel darkframe(nullptr, userdb_);
     darkframe.setTable("darkframe");
     darkframe.select();
 
     for (int i = 0; i < darkframe.rowCount(); ++i)
     {
         QVariantMap recordMap;
         QSqlRecord record = darkframe.record(i);
         for (int j = 1; j < record.count(); j++)
             recordMap[record.fieldName(j)] = record.value(j);
 
         darkFrames.append(recordMap);
     }
 
     userdb_.close();
 }
 
 
 /* HiPS Section */
 
 void KSUserDB::AddHIPSSource(const QMap<QString,QString> &oneSource)
 {
     userdb_.open();
-    QSqlTableModel HIPSSource(0, userdb_);
+    QSqlTableModel HIPSSource(nullptr, userdb_);
     HIPSSource.setTable("hips");
     HIPSSource.select();
 
     QSqlRecord record = HIPSSource.record();
 
     for (QMap<QString,QString>::const_iterator iter = oneSource.begin(); iter != oneSource.end(); ++iter)
         record.setValue(iter.key(), iter.value());
 
     HIPSSource.insertRecord(-1, record);
 
     HIPSSource.submitAll();
 
     userdb_.close();
 }
 
 bool KSUserDB::DeleteHIPSSource(const QString &ID)
 {
     userdb_.open();
-    QSqlTableModel HIPSSource(0, userdb_);
+    QSqlTableModel HIPSSource(nullptr, userdb_);
     HIPSSource.setTable("hips");
     HIPSSource.setFilter("ID = \'" + ID + "\'");
 
     HIPSSource.select();
 
     HIPSSource.removeRows(0, 1);
     HIPSSource.submitAll();
 
     userdb_.close();
 
     return true;
 }
 
 void KSUserDB::GetAllHIPSSources(QList<QMap<QString, QString>> &HIPSSources)
 {
     HIPSSources.clear();
 
     userdb_.open();
-    QSqlTableModel HIPSSource(0, userdb_);
+    QSqlTableModel HIPSSource(nullptr, userdb_);
     HIPSSource.setTable("hips");
     HIPSSource.select();
 
     for (int i = 0; i < HIPSSource.rowCount(); ++i)
     {
         QMap<QString,QString> recordMap;
         QSqlRecord record = HIPSSource.record(i);
         for (int j = 1; j < record.count(); j++)
             recordMap[record.fieldName(j)] = record.value(j).toString();
 
         HIPSSources.append(recordMap);
     }
 
     userdb_.close();
 }
 
 /*
  * Flag Section
 */
 
 void KSUserDB::DeleteAllFlags()
 {
     userdb_.open();
-    QSqlTableModel flags(0, userdb_);
+    QSqlTableModel flags(nullptr, userdb_);
     flags.setEditStrategy(QSqlTableModel::OnManualSubmit);
     flags.setTable("flags");
     flags.select();
 
     flags.removeRows(0, flags.rowCount());
     flags.submitAll();
 
     flags.clear();
     userdb_.close();
 }
 
 void KSUserDB::AddFlag(const QString &ra, const QString &dec, const QString &epoch, const QString &image_name,
                        const QString &label, const QString &labelColor)
 {
     userdb_.open();
-    QSqlTableModel flags(0, userdb_);
+    QSqlTableModel flags(nullptr, userdb_);
     flags.setTable("flags");
 
     int row = 0;
     flags.insertRows(row, 1);
     flags.setData(flags.index(row, 1), ra); // row,0 is autoincerement ID
     flags.setData(flags.index(row, 2), dec);
     flags.setData(flags.index(row, 3), image_name);
     flags.setData(flags.index(row, 4), label);
     flags.setData(flags.index(row, 5), labelColor);
     flags.setData(flags.index(row, 6), epoch);
     flags.submitAll();
 
     flags.clear();
     userdb_.close();
 }
 
 QList<QStringList> KSUserDB::GetAllFlags()
 {
     QList<QStringList> flagList;
 
     userdb_.open();
-    QSqlTableModel flags(0, userdb_);
+    QSqlTableModel flags(nullptr, userdb_);
     flags.setTable("flags");
     flags.select();
 
     for (int i = 0; i < flags.rowCount(); ++i)
     {
         QStringList flagEntry;
         QSqlRecord record = flags.record(i);
         /* flagEntry order description
          * The variation in the order is due to variation
          * in flag entry description order and flag database
          * description order.
          * flag (database): ra, dec, icon, label, color, epoch
          * flag (object):  ra, dec, epoch, icon, label, color
         */
         flagEntry.append(record.value(1).toString());
         flagEntry.append(record.value(2).toString());
         flagEntry.append(record.value(6).toString());
         flagEntry.append(record.value(3).toString());
         flagEntry.append(record.value(4).toString());
         flagEntry.append(record.value(5).toString());
         flagList.append(flagEntry);
     }
 
     flags.clear();
     userdb_.close();
     return flagList;
 }
 
 /*
  * Generic Section
  */
 void KSUserDB::DeleteEquipment(const QString &type, const int &id)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable(type);
     equip.setFilter("id = " + QString::number(id));
     equip.select();
 
     equip.removeRows(0, equip.rowCount());
     equip.submitAll();
 
     equip.clear();
     userdb_.close();
 }
 
 void KSUserDB::DeleteAllEquipment(const QString &type)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setEditStrategy(QSqlTableModel::OnManualSubmit);
     equip.setTable(type);
     equip.setFilter("id >= 1");
     equip.select();
     equip.removeRows(0, equip.rowCount());
     equip.submitAll();
 
     equip.clear();
     userdb_.close();
 }
 
 /*
  * Telescope section
  */
 void KSUserDB::AddScope(const QString &model, const QString &vendor, const QString &driver, const QString &type,
                         const double &focalLength, const double &aperture)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("telescope");
 
     int row = 0;
     equip.insertRows(row, 1);
     equip.setData(equip.index(row, 1), vendor); // row,0 is autoincerement ID
     equip.setData(equip.index(row, 2), aperture);
     equip.setData(equip.index(row, 3), model);
     equip.setData(equip.index(row, 4), driver);
     equip.setData(equip.index(row, 5), type);
     equip.setData(equip.index(row, 6), focalLength);
     equip.submitAll();
 
     equip.clear(); //DB will not close if linked object not cleared
     userdb_.close();
 }
 
 void KSUserDB::AddScope(const QString &model, const QString &vendor, const QString &driver, const QString &type,
                         const double &focalLength, const double &aperture, const QString &id)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("telescope");
     equip.setFilter("id = " + id);
     equip.select();
 
     if (equip.rowCount() > 0)
     {
         QSqlRecord record = equip.record(0);
         record.setValue(1, vendor);
         record.setValue(2, aperture);
         record.setValue(3, model);
         record.setValue(4, driver);
         record.setValue(5, type);
         record.setValue(6, focalLength);
         equip.setRecord(0, record);
         equip.submitAll();
     }
 
     userdb_.close();
 }
 #ifndef KSTARS_LITE
 void KSUserDB::GetAllScopes(QList<Scope *> &scope_list)
 {
     scope_list.clear();
 
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("telescope");
     equip.select();
 
     for (int i = 0; i < equip.rowCount(); ++i)
     {
         QSqlRecord record  = equip.record(i);
         QString id         = record.value("id").toString();
         QString vendor     = record.value("Vendor").toString();
         double aperture    = record.value("Aperture").toDouble();
         QString model      = record.value("Model").toString();
         QString driver     = record.value("Driver").toString();
         QString type       = record.value("Type").toString();
         double focalLength = record.value("FocalLength").toDouble();
         OAL::Scope *o      = new OAL::Scope(id, model, vendor, type, focalLength, aperture);
         o->setINDIDriver(driver);
         scope_list.append(o);
     }
 
     equip.clear();
     userdb_.close();
 }
 #endif
 /*
  * Eyepiece section
  */
 void KSUserDB::AddEyepiece(const QString &vendor, const QString &model, const double &focalLength, const double &fov,
                            const QString &fovunit)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("eyepiece");
 
     int row = 0;
     equip.insertRows(row, 1);
     equip.setData(equip.index(row, 1), vendor); // row,0 is autoincerement ID
     equip.setData(equip.index(row, 2), model);
     equip.setData(equip.index(row, 3), focalLength);
     equip.setData(equip.index(row, 4), fov);
     equip.setData(equip.index(row, 5), fovunit);
     equip.submitAll();
 
     equip.clear();
     userdb_.close();
 }
 
 void KSUserDB::AddEyepiece(const QString &vendor, const QString &model, const double &focalLength, const double &fov,
                            const QString &fovunit, const QString &id)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("eyepiece");
     equip.setFilter("id = " + id);
     equip.select();
 
     if (equip.rowCount() > 0)
     {
         QSqlRecord record = equip.record(0);
         record.setValue(1, vendor);
         record.setValue(2, model);
         record.setValue(3, focalLength);
         record.setValue(4, fov);
         record.setValue(5, fovunit);
         equip.setRecord(0, record);
         equip.submitAll();
     }
 
     userdb_.close();
 }
 #ifndef KSTARS_LITE
 void KSUserDB::GetAllEyepieces(QList<OAL::Eyepiece *> &eyepiece_list)
 {
     eyepiece_list.clear();
 
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("eyepiece");
     equip.select();
 
     for (int i = 0; i < equip.rowCount(); ++i)
     {
         QSqlRecord record  = equip.record(i);
         QString id         = record.value("id").toString();
         QString vendor     = record.value("Vendor").toString();
         QString model      = record.value("Model").toString();
         double focalLength = record.value("FocalLength").toDouble();
         double fov         = record.value("ApparentFOV").toDouble();
         QString fovUnit    = record.value("FOVUnit").toString();
 
         OAL::Eyepiece *o = new OAL::Eyepiece(id, model, vendor, fov, fovUnit, focalLength);
         eyepiece_list.append(o);
     }
 
     equip.clear();
     userdb_.close();
 }
 #endif
 /*
  * lens section
  */
 void KSUserDB::AddLens(const QString &vendor, const QString &model, const double &factor)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("lens");
 
     int row = 0;
     equip.insertRows(row, 1);
     equip.setData(equip.index(row, 1), vendor); // row,0 is autoincerement ID
     equip.setData(equip.index(row, 2), model);
     equip.setData(equip.index(row, 3), factor);
     equip.submitAll();
 
     equip.clear();
     userdb_.close();
 }
 
 void KSUserDB::AddLens(const QString &vendor, const QString &model, const double &factor, const QString &id)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("lens");
     equip.setFilter("id = " + id);
     equip.select();
 
     if (equip.rowCount() > 0)
     {
         QSqlRecord record = equip.record(0);
         record.setValue(1, vendor);
         record.setValue(2, model);
         record.setValue(3, factor);
         equip.submitAll();
     }
 
     userdb_.close();
 }
 #ifndef KSTARS_LITE
 void KSUserDB::GetAllLenses(QList<OAL::Lens *> &lens_list)
 {
     lens_list.clear();
 
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("lens");
     equip.select();
 
     for (int i = 0; i < equip.rowCount(); ++i)
     {
         QSqlRecord record = equip.record(i);
         QString id        = record.value("id").toString();
         QString vendor    = record.value("Vendor").toString();
         QString model     = record.value("Model").toString();
         double factor     = record.value("Factor").toDouble();
         OAL::Lens *o      = new OAL::Lens(id, model, vendor, factor);
         lens_list.append(o);
     }
 
     equip.clear();
     userdb_.close();
 }
 #endif
 /*
  *  filter section
  */
 void KSUserDB::AddFilter(const QString &vendor, const QString &model, const QString &type, const QString &offset,
                          const QString &color, const QString &exposure)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("filter");
 
     int row = 0;
     equip.insertRows(row, 1);
     equip.setData(equip.index(row, 1), vendor); // row,0 is autoincerement ID
     equip.setData(equip.index(row, 2), model);
     equip.setData(equip.index(row, 3), type);
     equip.setData(equip.index(row, 4), offset);
     equip.setData(equip.index(row, 5), color);
     equip.setData(equip.index(row, 6), exposure);
     if (equip.submitAll() == false)
         qCritical() << "AddFilter:" << equip.lastError();
 
     equip.clear();
     userdb_.close();
 }
 
 void KSUserDB::AddFilter(const QString &vendor, const QString &model, const QString &type, const QString &offset,
                          const QString &color, const QString &exposure, const QString &id)
 {
     userdb_.open();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("filter");
     equip.setFilter("id = " + id);
     equip.select();
 
     if (equip.rowCount() > 0)
     {
         QSqlRecord record = equip.record(0);
         record.setValue(1, vendor);
         record.setValue(2, model);
         record.setValue(3, type);
         record.setValue(4, offset);
         record.setValue(5, color);
         record.setValue(6, exposure);
         equip.setRecord(0, record);
         if (equip.submitAll() == false)
             qCritical() << "AddFilter:" << equip.lastError();
     }
 
     userdb_.close();
 }
 #ifndef KSTARS_LITE
 void KSUserDB::GetAllFilters(QList<OAL::Filter *> &filter_list)
 {
     userdb_.open();
     filter_list.clear();
-    QSqlTableModel equip(0, userdb_);
+    QSqlTableModel equip(nullptr, userdb_);
     equip.setTable("filter");
     equip.select();
 
     for (int i = 0; i < equip.rowCount(); ++i)
     {
         QSqlRecord record = equip.record(i);
         QString id        = record.value("id").toString();
         QString vendor    = record.value("Vendor").toString();
         QString model     = record.value("Model").toString();
         QString type      = record.value("Type").toString();
         QString color     = record.value("Color").toString();
         QString offset    = record.value("Offset").toString();
         QString exposure  = record.value("Exposure").toString();
         OAL::Filter *o    = new OAL::Filter(id, model, vendor, type, offset, color, exposure);
         filter_list.append(o);
     }
 
     equip.clear();
     userdb_.close();
     return;
 }
 #endif
 #if 0
 bool KSUserDB::ImportFlags()
 {
     QString flagfilename = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + QDir::separator() + "flags.dat";
     QFile flagsfile(flagfilename);
     if (!flagsfile.exists())
     {
         return false;  // No upgrade needed. Flags file doesn't exist.
     }
 
     QList< QPair<QString, KSParser::DataTypes> > flag_file_sequence;
     flag_file_sequence.append(qMakePair(QString("RA"), KSParser::D_QSTRING));
     flag_file_sequence.append(qMakePair(QString("Dec"), KSParser::D_QSTRING));
     flag_file_sequence.append(qMakePair(QString("epoch"), KSParser::D_QSTRING));
     flag_file_sequence.append(qMakePair(QString("icon"), KSParser::D_QSTRING));
     flag_file_sequence.append(qMakePair(QString("label"), KSParser::D_QSTRING));
     flag_file_sequence.append(qMakePair(QString("color"), KSParser::D_QSTRING));
     KSParser flagparser(flagfilename,'#',flag_file_sequence,' ');
 
     QHash<QString, QVariant> row_content;
     while (flagparser.HasNextRow())
     {
         row_content = flagparser.ReadNextRow();
         QString ra = row_content["RA"].toString();
         QString dec = row_content["Dec"].toString();
         QString epoch = row_content["epoch"].toString();
         QString icon = row_content["icon"].toString();
         QString label = row_content["label"].toString();
         QString color = row_content["color"].toString();
 
         AddFlag(ra,dec,epoch,icon,label,color);
     }
     return true;
 }
 
 bool KSUserDB::ImportUsers()
 {
     QString usersfilename = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + QDir::separator() + "observerlist.xml";
     QFile usersfile(usersfilename);
 
     if (!usersfile.exists())
     {
         return false;  // No upgrade needed. Users file doesn't exist.
     }
 
     if( ! usersfile.open( QIODevice::ReadOnly ) )
         return false;
 
     QXmlStreamReader * reader = new QXmlStreamReader(&usersfile);
 
     while( ! reader->atEnd() )
     {
         reader->readNext();
 
         if( reader->isEndElement() )
             break;
 
         if( reader->isStartElement() )
         {
             if (reader->name() != "observers")
                 continue;
 
             //Read all observers
             while( ! reader->atEnd() )
             {
                 reader->readNext();
 
                 if( reader->isEndElement() )
                     break;
 
                 if( reader->isStartElement() )
                 {
                     // Read single observer
                     if( reader->name() == "observer" )
                     {
                         QString name, surname, contact;
                         while( ! reader->atEnd() )
                         {
                             reader->readNext();
 
                             if( reader->isEndElement() )
                                 break;
 
                             if( reader->isStartElement() )
                             {
                                 if( reader->name() == "name" )
                                 {
                                     name = reader->readElementText();
                                 }
                                 else if( reader->name() == "surname" )
                                 {
                                     surname = reader->readElementText();
                                 }
                                 else if( reader->name() == "contact" )
                                 {
                                     contact = reader->readElementText();
                                 }
                             }
                         }
                         AddObserver(name, surname, contact);
                     }
                 }
             }
         }
     }
     delete reader_;
     usersfile.close();
     return true;
 }
 
 bool KSUserDB::ImportEquipment()
 {
     QString equipfilename = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + QDir::separator() + "equipmentlist.xml";
     QFile equipfile(equipfilename);
 
     if (!equipfile.exists())
     {
         return false;  // No upgrade needed. File doesn't exist.
     }
 
     if( ! equipfile.open( QIODevice::ReadOnly ) )
         return false;
 
     reader_ = new QXmlStreamReader(&equipfile);
     while( ! reader_->atEnd() )
     {
         reader_->readNext();
         if( reader_->isStartElement() )
         {
             while( ! reader_->atEnd() )
             {
                 reader_->readNext();
 
                 if( reader_->isEndElement() )
                     break;
 
                 if( reader_->isStartElement() )
                 {
                     if( reader_->name() == "scopes" )
                         readScopes();
                     else if( reader_->name() == "eyepieces" )
                         readEyepieces();
                     else if( reader_->name() =="lenses" )
                         readLenses();
                     else if( reader_->name() =="filters" )
                         readFilters();
                 }
             }
         }
     }
     delete reader_;
     equipfile.close();
     return true;
 }
 #endif
 
 void KSUserDB::readScopes()
 {
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "scope")
                 readScope();
         }
     }
 }
 
 void KSUserDB::readEyepieces()
 {
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "eyepiece")
                 readEyepiece();
         }
     }
 }
 
 void KSUserDB::readLenses()
 {
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "lens")
                 readLens();
         }
     }
 }
 
 void KSUserDB::readFilters()
 {
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "filter")
                 readFilter();
         }
     }
 }
 
 void KSUserDB::readScope()
 {
     QString model, vendor, type, driver = i18nc("No driver", "None");
     double aperture = 0, focalLength = 0;
 
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "model")
             {
                 model = reader_->readElementText();
             }
             else if (reader_->name() == "vendor")
             {
                 vendor = reader_->readElementText();
             }
             else if (reader_->name() == "type")
             {
                 type = reader_->readElementText();
                 if (type == "N")
                     type = "Newtonian";
                 if (type == "R")
                     type = "Refractor";
                 if (type == "M")
                     type = "Maksutov";
                 if (type == "S")
                     type = "Schmidt-Cassegrain";
                 if (type == "K")
                     type = "Kutter (Schiefspiegler)";
                 if (type == "C")
                     type = "Cassegrain";
             }
             else if (reader_->name() == "focalLength")
             {
                 focalLength = (reader_->readElementText()).toDouble();
             }
             else if (reader_->name() == "aperture")
                 aperture = (reader_->readElementText()).toDouble();
             else if (reader_->name() == "driver")
                 driver = reader_->readElementText();
         }
     }
 
     AddScope(model, vendor, driver, type, focalLength, aperture);
 }
 
 void KSUserDB::readEyepiece()
 {
     QString model, focalLength, vendor, fov, fovUnit;
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "model")
             {
                 model = reader_->readElementText();
             }
             else if (reader_->name() == "vendor")
             {
                 vendor = reader_->readElementText();
             }
             else if (reader_->name() == "apparentFOV")
             {
                 fov     = reader_->readElementText();
                 fovUnit = reader_->attributes().value("unit").toString();
             }
             else if (reader_->name() == "focalLength")
             {
                 focalLength = reader_->readElementText();
             }
         }
     }
 
     AddEyepiece(vendor, model, focalLength.toDouble(), fov.toDouble(), fovUnit);
 }
 
 void KSUserDB::readLens()
 {
     QString model, factor, vendor;
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "model")
             {
                 model = reader_->readElementText();
             }
             else if (reader_->name() == "vendor")
             {
                 vendor = reader_->readElementText();
             }
             else if (reader_->name() == "factor")
             {
                 factor = reader_->readElementText();
             }
         }
     }
 
     AddLens(vendor, model, factor.toDouble());
 }
 
 void KSUserDB::readFilter()
 {
     QString model, vendor, type, offset, color, exposure;
     while (!reader_->atEnd())
     {
         reader_->readNext();
 
         if (reader_->isEndElement())
             break;
 
         if (reader_->isStartElement())
         {
             if (reader_->name() == "model")
             {
                 model = reader_->readElementText();
             }
             else if (reader_->name() == "vendor")
             {
                 vendor = reader_->readElementText();
             }
             else if (reader_->name() == "type")
             {
                 type = reader_->readElementText();
             }
             else if (reader_->name() == "offset")
             {
                 offset = reader_->readElementText();
             }
             else if (reader_->name() == "color")
             {
                 color = reader_->readElementText();
             }
             else if (reader_->name() == "exposure")
             {
                 exposure = reader_->readElementText();
             }
         }
     }
     AddFilter(vendor, model, type, offset, color, exposure);
 }
 
 QList<ArtificialHorizonEntity *> KSUserDB::GetAllHorizons()
 {
     QList<ArtificialHorizonEntity *> horizonList;
 
     userdb_.open();
-    QSqlTableModel regions(0, userdb_);
+    QSqlTableModel regions(nullptr, userdb_);
     regions.setTable("horizons");
     regions.select();
 
-    QSqlTableModel points(0, userdb_);
+    QSqlTableModel points(nullptr, userdb_);
 
     for (int i = 0; i < regions.rowCount(); ++i)
     {
         QSqlRecord record   = regions.record(i);
         QString regionTable = record.value("name").toString();
         QString regionName  = record.value("label").toString();
         bool enabled        = record.value("enabled").toInt() == 1 ? true : false;
 
         points.setTable(regionTable);
         points.select();
 
         std::shared_ptr<LineList> skyList(new LineList());
 
         ArtificialHorizonEntity *horizon = new ArtificialHorizonEntity;
 
         horizon->setRegion(regionName);
         horizon->setEnabled(enabled);
         horizon->setList(skyList);
 
         horizonList.append(horizon);
 
         for (int j = 0; j < points.rowCount(); j++)
         {
             std::shared_ptr<SkyPoint> p(new SkyPoint());
 
             record = points.record(j);
             p->setAz(record.value(0).toDouble());
             p->setAlt(record.value(1).toDouble());
             p->HorizontalToEquatorial(KStarsData::Instance()->lst(), KStarsData::Instance()->geo()->lat());
             skyList->append(std::move(p));
         }
 
         points.clear();
     }
 
     regions.clear();
     userdb_.close();
     return horizonList;
 }
 
 void KSUserDB::DeleteAllHorizons()
 {
     userdb_.open();
-    QSqlTableModel regions(0, userdb_);
+    QSqlTableModel regions(nullptr, userdb_);
     regions.setEditStrategy(QSqlTableModel::OnManualSubmit);
     regions.setTable("horizons");
     regions.select();
 
     QSqlQuery query(userdb_);
 
     for (int i = 0; i < regions.rowCount(); ++i)
     {
         QSqlRecord record  = regions.record(i);
         QString tableQuery = QString("DROP TABLE %1").arg(record.value("name").toString());
         if (!query.exec(tableQuery))
             qCWarning(KSTARS) << query.lastError().text();
     }
 
     regions.removeRows(0, regions.rowCount());
     regions.submitAll();
 
     regions.clear();
     userdb_.close();
 }
 
 void KSUserDB::AddHorizon(ArtificialHorizonEntity *horizon)
 {
     userdb_.open();
-    QSqlTableModel regions(0, userdb_);
+    QSqlTableModel regions(nullptr, userdb_);
     regions.setTable("horizons");
 
     regions.select();
     QString tableName = QString("horizon_%1").arg(regions.rowCount() + 1);
 
     regions.insertRow(0);
     regions.setData(regions.index(0, 1), tableName);
     regions.setData(regions.index(0, 2), horizon->region());
     regions.setData(regions.index(0, 3), horizon->enabled() ? 1 : 0);
     regions.submitAll();
     regions.clear();
 
     QString tableQuery = QString("CREATE TABLE %1 (Az REAL NOT NULL, Alt REAL NOT NULL)").arg(tableName);
     QSqlQuery query(userdb_);
     query.exec(tableQuery);
 
-    QSqlTableModel points(0, userdb_);
+    QSqlTableModel points(nullptr, userdb_);
 
     points.setTable(tableName);
 
     SkyList *skyList = horizon->list()->points();
 
     for (int i = 0; i < skyList->size(); i++)
     {
         points.select();
         QSqlRecord rec(points.record());
         rec.setValue("Az", skyList->at(i)->az().Degrees());
         rec.setValue("Alt", skyList->at(i)->alt().Degrees());
         points.insertRecord(-1, rec);
     }
 
     points.submitAll();
     points.clear();
 
     userdb_.close();
 }
 
 int KSUserDB::AddProfile(const QString &name)
 {
     userdb_.open();
     int id = -1;
 
     QSqlQuery query(userdb_);
     bool rc = query.exec(QString("INSERT INTO profile (name) VALUES('%1')").arg(name));
 
     if (rc == false)
         qCWarning(KSTARS) << query.lastQuery() << query.lastError().text();
     else
         id = query.lastInsertId().toInt();
 
     userdb_.close();
 
     return id;
 }
 
 bool KSUserDB::DeleteProfile(ProfileInfo *pi)
 {
     userdb_.open();
 
     QSqlQuery query(userdb_);
     bool rc;
 
     rc = query.exec("DELETE FROM profile WHERE id=" + QString::number(pi->id));
 
     if (rc == false)
         qCWarning(KSTARS) << query.lastQuery() << query.lastError().text();
 
     userdb_.close();
 
     return rc;
 }
 
 void KSUserDB::SaveProfile(ProfileInfo *pi)
 {
     // Remove all drivers
     DeleteProfileDrivers(pi);
 
     userdb_.open();
     QSqlQuery query(userdb_);
 
     // Clear data
     if (!query.exec(QString("UPDATE profile SET "
                             "host=null,port=null,city=null,province=null,country=null,indiwebmanagerport=NULL,"
                             "autoconnect=NULL,primaryscope=0,guidescope=0 WHERE id=%1")
                         .arg(pi->id)))
         qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
 
     // Update Name
     if (!query.exec(QString("UPDATE profile SET name='%1' WHERE id=%2").arg(pi->name).arg(pi->id)))
         qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
 
     // Update Remote Data
     if (pi->host.isEmpty() == false)
     {
         if (!query.exec(
                 QString("UPDATE profile SET host='%1',port=%2 WHERE id=%3").arg(pi->host).arg((pi->port)).arg(pi->id)))
             qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
 
         if (pi->INDIWebManagerPort != -1)
         {
             if (!query.exec(QString("UPDATE profile SET indiwebmanagerport='%1' WHERE id=%2")
                                 .arg(pi->INDIWebManagerPort)
                                 .arg(pi->id)))
                 qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
         }
     }
 
     // Update City Info
     if (pi->city.isEmpty() == false)
     {
         if (!query.exec(QString("UPDATE profile SET city='%1',province='%2',country='%3' WHERE id=%4")
                             .arg(pi->city, pi->province, pi->country)
                             .arg(pi->id)))
         {
             qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
         }
     }
 
     // Update Auto Connect Info
     if (!query.exec(QString("UPDATE profile SET autoconnect=%1 WHERE id=%2").arg(pi->autoConnect ? 1 : 0).arg(pi->id)))
         qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
 
     // Update Guide Application Info
     if (!query.exec(QString("UPDATE profile SET guidertype=%1 WHERE id=%2").arg(pi->guidertype).arg(pi->id)))
         qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
 
     // If using external guider
     if (pi->guidertype != 0)
     {
         if (!query.exec(QString("UPDATE profile SET guiderhost='%1' WHERE id=%2").arg(pi->guiderhost).arg(pi->id)))
             qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
         if (!query.exec(QString("UPDATE profile SET guiderport=%1 WHERE id=%2").arg(pi->guiderport).arg(pi->id)))
             qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
     }
 
     // Update scope selection
     if (!query.exec(QString("UPDATE profile SET primaryscope='%1' WHERE id=%2").arg(pi->primaryscope).arg(pi->id)))
         qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
     if (!query.exec(QString("UPDATE profile SET guidescope=%1 WHERE id=%2").arg(pi->guidescope).arg(pi->id)))
         qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
 
     QMapIterator<QString, QString> i(pi->drivers);
     while (i.hasNext())
     {
         i.next();
         if (!query.exec(QString("INSERT INTO driver (label, role, profile) VALUES('%1','%2',%3)")
                             .arg(i.value(), i.key())
                             .arg(pi->id)))
         {
             qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
         }
     }
 
     /*if (pi->customDrivers.isEmpty() == false && !query.exec(QString("INSERT INTO custom_driver (drivers, profile) VALUES('%1',%2)").arg(pi->customDrivers).arg(pi->id)))
         qDebug()  << query.lastQuery() << query.lastError().text();*/
 
     userdb_.close();
 }
 
 void KSUserDB::GetAllProfiles(QList<std::shared_ptr<ProfileInfo>> &profiles)
 {
     userdb_.open();
-    QSqlTableModel profile(0, userdb_);
+    QSqlTableModel profile(nullptr, userdb_);
     profile.setTable("profile");
     profile.select();
 
     for (int i = 0; i < profile.rowCount(); ++i)
     {
         QSqlRecord record = profile.record(i);
 
         int id       = record.value("id").toInt();
         QString name = record.value("name").toString();
         std::shared_ptr<ProfileInfo> pi(new ProfileInfo(id, name));
 
         // Add host and port
         pi->host = record.value("host").toString();
         pi->port = record.value("port").toInt();
 
         // City info
         pi->city     = record.value("city").toString();
         pi->province = record.value("province").toString();
         pi->country  = record.value("country").toString();
 
         pi->INDIWebManagerPort = record.value("indiwebmanagerport").toInt();
         pi->autoConnect        = (record.value("autoconnect").toInt() == 1);
 
         pi->guidertype = record.value("guidertype").toInt();
         if (pi->guidertype != 0)
         {
             pi->guiderhost = record.value("guiderhost").toString();
             pi->guiderport = record.value("guiderport").toInt();
         }
 
         pi->primaryscope = record.value("primaryscope").toInt();
         pi->guidescope = record.value("guidescope").toInt();
 
         GetProfileDrivers(pi.get());
         //GetProfileCustomDrivers(pi);
 
         profiles.append(pi);
     }
 
     profile.clear();
     userdb_.close();
 }
 
 void KSUserDB::GetProfileDrivers(ProfileInfo *pi)
 {
     userdb_.open();
 
-    QSqlTableModel driver(0, userdb_);
+    QSqlTableModel driver(nullptr, userdb_);
     driver.setTable("driver");
     driver.setFilter("profile=" + QString::number(pi->id));
     if (driver.select() == false)
         qCWarning(KSTARS) << "Driver select error:" << driver.lastError().text();
 
     for (int i = 0; i < driver.rowCount(); ++i)
     {
         QSqlRecord record = driver.record(i);
         QString label     = record.value("label").toString();
         QString role      = record.value("role").toString();
 
         pi->drivers[role] = label;
     }
 
     driver.clear();
     userdb_.close();
 }
 
 /*void KSUserDB::GetProfileCustomDrivers(ProfileInfo* pi)
 {
     userdb_.open();
     QSqlTableModel custom_driver(0, userdb_);
     custom_driver.setTable("driver");
     custom_driver.setFilter("profile=" + QString::number(pi->id));
     if (custom_driver.select() == false)
         qDebug() << "custom driver select error: " << custom_driver.query().lastQuery() << custom_driver.lastError().text();
 
     QSqlRecord record = custom_driver.record(0);
     pi->customDrivers   = record.value("drivers").toString();
 
     custom_driver.clear();
     userdb_.close();
 }*/
 
 void KSUserDB::DeleteProfileDrivers(ProfileInfo *pi)
 {
     userdb_.open();
 
     QSqlQuery query(userdb_);
 
     /*if (!query.exec("DELETE FROM custom_driver WHERE profile=" + QString::number(pi->id)))
         qDebug() << query.lastQuery() << query.lastError().text();*/
 
     if (!query.exec("DELETE FROM driver WHERE profile=" + QString::number(pi->id)))
         qCWarning(KSTARS) << query.executedQuery() << query.lastError().text();
 
     userdb_.close();
 }
diff --git a/kstars/auxiliary/ksutils.cpp b/kstars/auxiliary/ksutils.cpp
index b9734a031..42648c801 100644
--- a/kstars/auxiliary/ksutils.cpp
+++ b/kstars/auxiliary/ksutils.cpp
@@ -1,1254 +1,1254 @@
 /***************************************************************************
                           ksutils.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Mon Jan  7 10:48:09 EST 2002
     copyright            : (C) 2002 by Mark Hollomon
     email                : mhh@mindspring.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "ksutils.h"
 
 #include "deepskyobject.h"
 #ifndef KSTARS_LITE
 #include "kswizard.h"
 #endif
 #include "Options.h"
 #include "starobject.h"
 #include "auxiliary/kspaths.h"
 
 #ifndef KSTARS_LITE
 #include <KMessageBox>
 #endif
 
 #include <QPointer>
 #include <QProcessEnvironment>
 #include <QLoggingCategory>
 
 namespace KSUtils
 {
 bool openDataFile(QFile &file, const QString &s)
 {
     QString FileName = KSPaths::locate(QStandardPaths::GenericDataLocation, s);
     if (!FileName.isNull())
     {
         file.setFileName(FileName);
         return file.open(QIODevice::ReadOnly);
     }
     return false;
 }
 
 QString getDSSURL(const SkyPoint *const p)
 {
-    const DeepSkyObject *dso = 0;
+    const DeepSkyObject *dso = nullptr;
     double height, width;
 
     double dss_default_size = Options::defaultDSSImageSize();
     double dss_padding      = Options::dSSPadding();
 
     Q_ASSERT(p);
     Q_ASSERT(dss_default_size > 0.0 && dss_padding >= 0.0);
 
     dso = dynamic_cast<const DeepSkyObject *>(p);
 
     // Decide what to do about the height and width
     if (dso)
     {
         // For deep-sky objects, use their height and width information
         double a, b, pa;
         a = dso->a();
         b = dso->a() *
             dso->e(); // Use a * e instead of b, since e() returns 1 whenever one of the dimensions is zero. This is important for circular objects
         pa = dso->pa() * dms::DegToRad;
 
         // We now want to convert a, b, and pa into an image
         // height and width -- i.e. a dRA and dDec.
         // DSS uses dDec for height and dRA for width. (i.e. "top" is north in the DSS images, AFAICT)
         // From some trigonometry, assuming we have a rectangular object (worst case), we need:
         width  = a * sin(pa) + b * cos(pa);
         height = a * cos(pa) + b * sin(pa);
         // 'a' and 'b' are in arcminutes, so height and width are in arcminutes
 
         // Pad the RA and Dec, so that we show more of the sky than just the object.
         height += dss_padding;
         width += dss_padding;
     }
     else
     {
         // For a generic sky object, we don't know what to do. So
         // we just assume the default size.
         height = width = dss_default_size;
     }
     // There's no point in tiny DSS images that are smaller than dss_default_size
     if (height < dss_default_size)
         height = dss_default_size;
     if (width < dss_default_size)
         width = dss_default_size;
 
     return getDSSURL(p->ra0(), p->dec0(), width, height);
 }
 
 QString getDSSURL(const dms &ra, const dms &dec, float width, float height, const QString &type)
 {
     const QString URLprefix("http://archive.stsci.edu/cgi-bin/dss_search?");
     QString URLsuffix             = QString("&e=J2000&f=%1&c=none&fov=NONE").arg(type);
     const double dss_default_size = Options::defaultDSSImageSize();
 
     char decsgn = (dec.Degrees() < 0.0) ? '-' : '+';
     int dd      = abs(dec.degree());
     int dm      = abs(dec.arcmin());
     int ds      = abs(dec.arcsec());
 
     // Infinite and NaN sizes are replaced by the default size and tiny DSS images are resized to default size
     if (!qIsFinite(height) || height <= 0.0)
         height = dss_default_size;
     if (!qIsFinite(width) || width <= 0.0)
         width = dss_default_size;
 
     // DSS accepts images that are no larger than 75 arcminutes
     if (height > 75.0)
         height = 75.0;
     if (width > 75.0)
         width = 75.0;
 
     QString RAString, DecString, SizeString;
     DecString  = DecString.sprintf("&d=%c%02d+%02d+%02d", decsgn, dd, dm, ds);
     RAString   = RAString.sprintf("r=%02d+%02d+%02d", ra.hour(), ra.minute(), ra.second());
     SizeString = SizeString.sprintf("&h=%02.1f&w=%02.1f", height, width);
 
     return (URLprefix + RAString + DecString + SizeString + URLsuffix);
 }
 
 QString toDirectionString(dms angle)
 {
     // TODO: Instead of doing it this way, it would be nicer to
     // compute the string to arbitrary precision. Although that will
     // not be easy to localize.  (Consider, for instance, Indian
     // languages that have special names for the intercardinal points)
     // -- asimha
 
     static const char *directions[] = { I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "N"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "NNE"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "NE"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "ENE"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "E"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "ESE"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "SE"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "SSE"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "S"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "SSW"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "SW"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "WSW"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "W"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "WNW"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "NW"),
                                         I18N_NOOP2("Abbreviated cardinal / intercardinal etc. direction", "NNW"),
                                         I18N_NOOP2("Unknown cardinal / intercardinal direction", "???") };
 
     int index = (int)((angle.reduce().Degrees() + 11.25) / 22.5); // A number between 0 and 16 (inclusive) is expected
 
     if (index < 0 || index > 16)
         index = 16; // Something went wrong.
     else
         index = (index == 16 ? 0 : index);
 
     return i18nc("Abbreviated cardinal / intercardinal etc. direction", directions[index]);
 }
 
 QList<SkyObject *> *castStarObjListToSkyObjList(QList<StarObject *> *starObjList)
 {
     QList<SkyObject *> *skyObjList = new QList<SkyObject *>();
 
     foreach (StarObject *so, *starObjList)
     {
         skyObjList->append(so);
     }
     return skyObjList;
 }
 
 QString constGenetiveFromAbbrev(const QString &code)
 {
     if (code == "And")
         return QString("Andromedae");
     if (code == "Ant")
         return QString("Antliae");
     if (code == "Aps")
         return QString("Apodis");
     if (code == "Aqr")
         return QString("Aquarii");
     if (code == "Aql")
         return QString("Aquilae");
     if (code == "Ara")
         return QString("Arae");
     if (code == "Ari")
         return QString("Arietis");
     if (code == "Aur")
         return QString("Aurigae");
     if (code == "Boo")
         return QString("Bootis");
     if (code == "Cae")
         return QString("Caeli");
     if (code == "Cam")
         return QString("Camelopardalis");
     if (code == "Cnc")
         return QString("Cancri");
     if (code == "CVn")
         return QString("Canum Venaticorum");
     if (code == "CMa")
         return QString("Canis Majoris");
     if (code == "CMi")
         return QString("Canis Minoris");
     if (code == "Cap")
         return QString("Capricorni");
     if (code == "Car")
         return QString("Carinae");
     if (code == "Cas")
         return QString("Cassiopeiae");
     if (code == "Cen")
         return QString("Centauri");
     if (code == "Cep")
         return QString("Cephei");
     if (code == "Cet")
         return QString("Ceti");
     if (code == "Cha")
         return QString("Chamaeleontis");
     if (code == "Cir")
         return QString("Circini");
     if (code == "Col")
         return QString("Columbae");
     if (code == "Com")
         return QString("Comae Berenices");
     if (code == "CrA")
         return QString("Coronae Austrinae");
     if (code == "CrB")
         return QString("Coronae Borealis");
     if (code == "Crv")
         return QString("Corvi");
     if (code == "Crt")
         return QString("Crateris");
     if (code == "Cru")
         return QString("Crucis");
     if (code == "Cyg")
         return QString("Cygni");
     if (code == "Del")
         return QString("Delphini");
     if (code == "Dor")
         return QString("Doradus");
     if (code == "Dra")
         return QString("Draconis");
     if (code == "Equ")
         return QString("Equulei");
     if (code == "Eri")
         return QString("Eridani");
     if (code == "For")
         return QString("Fornacis");
     if (code == "Gem")
         return QString("Geminorum");
     if (code == "Gru")
         return QString("Gruis");
     if (code == "Her")
         return QString("Herculis");
     if (code == "Hor")
         return QString("Horologii");
     if (code == "Hya")
         return QString("Hydrae");
     if (code == "Hyi")
         return QString("Hydri");
     if (code == "Ind")
         return QString("Indi");
     if (code == "Lac")
         return QString("Lacertae");
     if (code == "Leo")
         return QString("Leonis");
     if (code == "LMi")
         return QString("Leonis Minoris");
     if (code == "Lep")
         return QString("Leporis");
     if (code == "Lib")
         return QString("Librae");
     if (code == "Lup")
         return QString("Lupi");
     if (code == "Lyn")
         return QString("Lyncis");
     if (code == "Lyr")
         return QString("Lyrae");
     if (code == "Men")
         return QString("Mensae");
     if (code == "Mic")
         return QString("Microscopii");
     if (code == "Mon")
         return QString("Monocerotis");
     if (code == "Mus")
         return QString("Muscae");
     if (code == "Nor")
         return QString("Normae");
     if (code == "Oct")
         return QString("Octantis");
     if (code == "Oph")
         return QString("Ophiuchi");
     if (code == "Ori")
         return QString("Orionis");
     if (code == "Pav")
         return QString("Pavonis");
     if (code == "Peg")
         return QString("Pegasi");
     if (code == "Per")
         return QString("Persei");
     if (code == "Phe")
         return QString("Phoenicis");
     if (code == "Pic")
         return QString("Pictoris");
     if (code == "Psc")
         return QString("Piscium");
     if (code == "PsA")
         return QString("Piscis Austrini");
     if (code == "Pup")
         return QString("Puppis");
     if (code == "Pyx")
         return QString("Pyxidis");
     if (code == "Ret")
         return QString("Reticuli");
     if (code == "Sge")
         return QString("Sagittae");
     if (code == "Sgr")
         return QString("Sagittarii");
     if (code == "Sco")
         return QString("Scorpii");
     if (code == "Scl")
         return QString("Sculptoris");
     if (code == "Sct")
         return QString("Scuti");
     if (code == "Ser")
         return QString("Serpentis");
     if (code == "Sex")
         return QString("Sextantis");
     if (code == "Tau")
         return QString("Tauri");
     if (code == "Tel")
         return QString("Telescopii");
     if (code == "Tri")
         return QString("Trianguli");
     if (code == "TrA")
         return QString("Trianguli Australis");
     if (code == "Tuc")
         return QString("Tucanae");
     if (code == "UMa")
         return QString("Ursae Majoris");
     if (code == "UMi")
         return QString("Ursae Minoris");
     if (code == "Vel")
         return QString("Velorum");
     if (code == "Vir")
         return QString("Virginis");
     if (code == "Vol")
         return QString("Volantis");
     if (code == "Vul")
         return QString("Vulpeculae");
     return code;
 }
 
 QString constNameFromAbbrev(const QString &code)
 {
     if (code == "And")
         return QString("Andromeda");
     if (code == "Ant")
         return QString("Antlia");
     if (code == "Aps")
         return QString("Apus");
     if (code == "Aqr")
         return QString("Aquarius");
     if (code == "Aql")
         return QString("Aquila");
     if (code == "Ara")
         return QString("Ara");
     if (code == "Ari")
         return QString("Aries");
     if (code == "Aur")
         return QString("Auriga");
     if (code == "Boo")
         return QString("Bootes");
     if (code == "Cae")
         return QString("Caelum");
     if (code == "Cam")
         return QString("Camelopardalis");
     if (code == "Cnc")
         return QString("Cancer");
     if (code == "CVn")
         return QString("Canes Venatici");
     if (code == "CMa")
         return QString("Canis Major");
     if (code == "CMi")
         return QString("Canis Minor");
     if (code == "Cap")
         return QString("Capricornus");
     if (code == "Car")
         return QString("Carina");
     if (code == "Cas")
         return QString("Cassiopeia");
     if (code == "Cen")
         return QString("Centaurus");
     if (code == "Cep")
         return QString("Cepheus");
     if (code == "Cet")
         return QString("Cetus");
     if (code == "Cha")
         return QString("Chamaeleon");
     if (code == "Cir")
         return QString("Circinus");
     if (code == "Col")
         return QString("Columba");
     if (code == "Com")
         return QString("Coma Berenices");
     if (code == "CrA")
         return QString("Corona Australis");
     if (code == "CrB")
         return QString("Corona Borealis");
     if (code == "Crv")
         return QString("Corvus");
     if (code == "Crt")
         return QString("Crater");
     if (code == "Cru")
         return QString("Crux");
     if (code == "Cyg")
         return QString("Cygnus");
     if (code == "Del")
         return QString("Delphinus");
     if (code == "Dor")
         return QString("Doradus");
     if (code == "Dra")
         return QString("Draco");
     if (code == "Equ")
         return QString("Equuleus");
     if (code == "Eri")
         return QString("Eridanus");
     if (code == "For")
         return QString("Fornax");
     if (code == "Gem")
         return QString("Gemini");
     if (code == "Gru")
         return QString("Grus");
     if (code == "Her")
         return QString("Hercules");
     if (code == "Hor")
         return QString("Horologium");
     if (code == "Hya")
         return QString("Hydra");
     if (code == "Hyi")
         return QString("Hydrus");
     if (code == "Ind")
         return QString("Indus");
     if (code == "Lac")
         return QString("Lacerta");
     if (code == "Leo")
         return QString("Leo");
     if (code == "LMi")
         return QString("Leo Minor");
     if (code == "Lep")
         return QString("Lepus");
     if (code == "Lib")
         return QString("Libra");
     if (code == "Lup")
         return QString("Lupus");
     if (code == "Lyn")
         return QString("Lynx");
     if (code == "Lyr")
         return QString("Lyra");
     if (code == "Men")
         return QString("Mensa");
     if (code == "Mic")
         return QString("Microscopium");
     if (code == "Mon")
         return QString("Monoceros");
     if (code == "Mus")
         return QString("Musca");
     if (code == "Nor")
         return QString("Norma");
     if (code == "Oct")
         return QString("Octans");
     if (code == "Oph")
         return QString("Ophiuchus");
     if (code == "Ori")
         return QString("Orion");
     if (code == "Pav")
         return QString("Pavo");
     if (code == "Peg")
         return QString("Pegasus");
     if (code == "Per")
         return QString("Perseus");
     if (code == "Phe")
         return QString("Phoenix");
     if (code == "Pic")
         return QString("Pictor");
     if (code == "Psc")
         return QString("Pisces");
     if (code == "PsA")
         return QString("Piscis Austrinus");
     if (code == "Pup")
         return QString("Puppis");
     if (code == "Pyx")
         return QString("Pyxis");
     if (code == "Ret")
         return QString("Reticulum");
     if (code == "Sge")
         return QString("Sagitta");
     if (code == "Sgr")
         return QString("Sagittarius");
     if (code == "Sco")
         return QString("Scorpius");
     if (code == "Scl")
         return QString("Sculptor");
     if (code == "Sct")
         return QString("Scutum");
     if (code == "Ser")
         return QString("Serpens");
     if (code == "Sex")
         return QString("Sextans");
     if (code == "Tau")
         return QString("Taurus");
     if (code == "Tel")
         return QString("Telescopium");
     if (code == "Tri")
         return QString("Triangulum");
     if (code == "TrA")
         return QString("Triangulum Australe");
     if (code == "Tuc")
         return QString("Tucana");
     if (code == "UMa")
         return QString("Ursa Major");
     if (code == "UMi")
         return QString("Ursa Minor");
     if (code == "Vel")
         return QString("Vela");
     if (code == "Vir")
         return QString("Virgo");
     if (code == "Vol")
         return QString("Volans");
     if (code == "Vul")
         return QString("Vulpecula");
     return code;
 }
 
 QString constNameToAbbrev(const QString &fullName_)
 {
     QString fullName = fullName_.toLower();
     if (fullName == "andromeda")
         return QString("And");
     if (fullName == "antlia")
         return QString("Ant");
     if (fullName == "apus")
         return QString("Aps");
     if (fullName == "aquarius")
         return QString("Aqr");
     if (fullName == "aquila")
         return QString("Aql");
     if (fullName == "ara")
         return QString("Ara");
     if (fullName == "aries")
         return QString("Ari");
     if (fullName == "auriga")
         return QString("Aur");
     if (fullName == "bootes")
         return QString("Boo");
     if (fullName == "caelum")
         return QString("Cae");
     if (fullName == "camelopardalis")
         return QString("Cam");
     if (fullName == "cancer")
         return QString("Cnc");
     if (fullName == "canes venatici")
         return QString("CVn");
     if (fullName == "canis major")
         return QString("CMa");
     if (fullName == "canis minor")
         return QString("CMi");
     if (fullName == "capricornus")
         return QString("Cap");
     if (fullName == "carina")
         return QString("Car");
     if (fullName == "cassiopeia")
         return QString("Cas");
     if (fullName == "centaurus")
         return QString("Cen");
     if (fullName == "cepheus")
         return QString("Cep");
     if (fullName == "cetus")
         return QString("Cet");
     if (fullName == "chamaeleon")
         return QString("Cha");
     if (fullName == "circinus")
         return QString("Cir");
     if (fullName == "columba")
         return QString("Col");
     if (fullName == "coma berenices")
         return QString("Com");
     if (fullName == "corona australis")
         return QString("CrA");
     if (fullName == "corona borealis")
         return QString("CrB");
     if (fullName == "corvus")
         return QString("Crv");
     if (fullName == "crater")
         return QString("Crt");
     if (fullName == "crux")
         return QString("Cru");
     if (fullName == "cygnus")
         return QString("Cyg");
     if (fullName == "delphinus")
         return QString("Del");
     if (fullName == "doradus")
         return QString("Dor");
     if (fullName == "draco")
         return QString("Dra");
     if (fullName == "equuleus")
         return QString("Equ");
     if (fullName == "eridanus")
         return QString("Eri");
     if (fullName == "fornax")
         return QString("For");
     if (fullName == "gemini")
         return QString("Gem");
     if (fullName == "grus")
         return QString("Gru");
     if (fullName == "hercules")
         return QString("Her");
     if (fullName == "horologium")
         return QString("Hor");
     if (fullName == "hydra")
         return QString("Hya");
     if (fullName == "hydrus")
         return QString("Hyi");
     if (fullName == "indus")
         return QString("Ind");
     if (fullName == "lacerta")
         return QString("Lac");
     if (fullName == "leo")
         return QString("Leo");
     if (fullName == "leo minor")
         return QString("LMi");
     if (fullName == "lepus")
         return QString("Lep");
     if (fullName == "libra")
         return QString("Lib");
     if (fullName == "lupus")
         return QString("Lup");
     if (fullName == "lynx")
         return QString("Lyn");
     if (fullName == "lyra")
         return QString("Lyr");
     if (fullName == "mensa")
         return QString("Men");
     if (fullName == "microscopium")
         return QString("Mic");
     if (fullName == "monoceros")
         return QString("Mon");
     if (fullName == "musca")
         return QString("Mus");
     if (fullName == "norma")
         return QString("Nor");
     if (fullName == "octans")
         return QString("Oct");
     if (fullName == "ophiuchus")
         return QString("Oph");
     if (fullName == "orion")
         return QString("Ori");
     if (fullName == "pavo")
         return QString("Pav");
     if (fullName == "pegasus")
         return QString("Peg");
     if (fullName == "perseus")
         return QString("Per");
     if (fullName == "phoenix")
         return QString("Phe");
     if (fullName == "pictor")
         return QString("Pic");
     if (fullName == "pisces")
         return QString("Psc");
     if (fullName == "piscis austrinus")
         return QString("PsA");
     if (fullName == "puppis")
         return QString("Pup");
     if (fullName == "pyxis")
         return QString("Pyx");
     if (fullName == "reticulum")
         return QString("Ret");
     if (fullName == "sagitta")
         return QString("Sge");
     if (fullName == "sagittarius")
         return QString("Sgr");
     if (fullName == "scorpius")
         return QString("Sco");
     if (fullName == "sculptor")
         return QString("Scl");
     if (fullName == "scutum")
         return QString("Sct");
     if (fullName == "serpens")
         return QString("Ser");
     if (fullName == "sextans")
         return QString("Sex");
     if (fullName == "taurus")
         return QString("Tau");
     if (fullName == "telescopium")
         return QString("Tel");
     if (fullName == "triangulum")
         return QString("Tri");
     if (fullName == "triangulum australe")
         return QString("TrA");
     if (fullName == "tucana")
         return QString("Tuc");
     if (fullName == "ursa major")
         return QString("UMa");
     if (fullName == "ursa minor")
         return QString("UMi");
     if (fullName == "vela")
         return QString("Vel");
     if (fullName == "virgo")
         return QString("Vir");
     if (fullName == "volans")
         return QString("Vol");
     if (fullName == "vulpecula")
         return QString("Vul");
     return fullName_;
 }
 
 QString constGenetiveToAbbrev(const QString &genetive_)
 {
     QString genetive = genetive_.toLower();
     if (genetive == "andromedae")
         return QString("And");
     if (genetive == "antliae")
         return QString("Ant");
     if (genetive == "apodis")
         return QString("Aps");
     if (genetive == "aquarii")
         return QString("Aqr");
     if (genetive == "aquilae")
         return QString("Aql");
     if (genetive == "arae")
         return QString("Ara");
     if (genetive == "arietis")
         return QString("Ari");
     if (genetive == "aurigae")
         return QString("Aur");
     if (genetive == "bootis")
         return QString("Boo");
     if (genetive == "caeli")
         return QString("Cae");
     if (genetive == "camelopardalis")
         return QString("Cam");
     if (genetive == "cancri")
         return QString("Cnc");
     if (genetive == "canum venaticorum")
         return QString("CVn");
     if (genetive == "canis majoris")
         return QString("CMa");
     if (genetive == "canis minoris")
         return QString("CMi");
     if (genetive == "capricorni")
         return QString("Cap");
     if (genetive == "carinae")
         return QString("Car");
     if (genetive == "cassiopeiae")
         return QString("Cas");
     if (genetive == "centauri")
         return QString("Cen");
     if (genetive == "cephei")
         return QString("Cep");
     if (genetive == "ceti")
         return QString("Cet");
     if (genetive == "chamaeleontis")
         return QString("Cha");
     if (genetive == "circini")
         return QString("Cir");
     if (genetive == "columbae")
         return QString("Col");
     if (genetive == "comae berenices")
         return QString("Com");
     if (genetive == "coronae austrinae")
         return QString("CrA");
     if (genetive == "coronae borealis")
         return QString("CrB");
     if (genetive == "corvi")
         return QString("Crv");
     if (genetive == "crateris")
         return QString("Crt");
     if (genetive == "crucis")
         return QString("Cru");
     if (genetive == "cygni")
         return QString("Cyg");
     if (genetive == "delphini")
         return QString("Del");
     if (genetive == "doradus")
         return QString("Dor");
     if (genetive == "draconis")
         return QString("Dra");
     if (genetive == "equulei")
         return QString("Equ");
     if (genetive == "eridani")
         return QString("Eri");
     if (genetive == "fornacis")
         return QString("For");
     if (genetive == "geminorum")
         return QString("Gem");
     if (genetive == "gruis")
         return QString("Gru");
     if (genetive == "herculis")
         return QString("Her");
     if (genetive == "horologii")
         return QString("Hor");
     if (genetive == "hydrae")
         return QString("Hya");
     if (genetive == "hydri")
         return QString("Hyi");
     if (genetive == "indi")
         return QString("Ind");
     if (genetive == "lacertae")
         return QString("Lac");
     if (genetive == "leonis")
         return QString("Leo");
     if (genetive == "leonis minoris")
         return QString("LMi");
     if (genetive == "leporis")
         return QString("Lep");
     if (genetive == "librae")
         return QString("Lib");
     if (genetive == "lupi")
         return QString("Lup");
     if (genetive == "lyncis")
         return QString("Lyn");
     if (genetive == "lyrae")
         return QString("Lyr");
     if (genetive == "mensae")
         return QString("Men");
     if (genetive == "microscopii")
         return QString("Mic");
     if (genetive == "monocerotis")
         return QString("Mon");
     if (genetive == "muscae")
         return QString("Mus");
     if (genetive == "normae")
         return QString("Nor");
     if (genetive == "octantis")
         return QString("Oct");
     if (genetive == "ophiuchi")
         return QString("Oph");
     if (genetive == "orionis")
         return QString("Ori");
     if (genetive == "pavonis")
         return QString("Pav");
     if (genetive == "pegasi")
         return QString("Peg");
     if (genetive == "persei")
         return QString("Per");
     if (genetive == "phoenicis")
         return QString("Phe");
     if (genetive == "pictoris")
         return QString("Pic");
     if (genetive == "piscium")
         return QString("Psc");
     if (genetive == "piscis austrini")
         return QString("PsA");
     if (genetive == "puppis")
         return QString("Pup");
     if (genetive == "pyxidis")
         return QString("Pyx");
     if (genetive == "reticuli")
         return QString("Ret");
     if (genetive == "sagittae")
         return QString("Sge");
     if (genetive == "sagittarii")
         return QString("Sgr");
     if (genetive == "scorpii")
         return QString("Sco");
     if (genetive == "sculptoris")
         return QString("Scl");
     if (genetive == "scuti")
         return QString("Sct");
     if (genetive == "serpentis")
         return QString("Ser");
     if (genetive == "sextantis")
         return QString("Sex");
     if (genetive == "tauri")
         return QString("Tau");
     if (genetive == "telescopii")
         return QString("Tel");
     if (genetive == "trianguli")
         return QString("Tri");
     if (genetive == "trianguli australis")
         return QString("TrA");
     if (genetive == "tucanae")
         return QString("Tuc");
     if (genetive == "ursae majoris")
         return QString("UMa");
     if (genetive == "ursae minoris")
         return QString("UMi");
     if (genetive == "velorum")
         return QString("Vel");
     if (genetive == "virginis")
         return QString("Vir");
     if (genetive == "volantis")
         return QString("Vol");
     if (genetive == "vulpeculae")
         return QString("Vul");
     return genetive_;
 }
 
 QString Logging::_filename;
 
 void Logging::UseFile()
 {
     if (_filename.isEmpty())
     {
         QDir dir;
         QString path = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "logs/" +
                        QDateTime::currentDateTime().toString("yyyy-MM-dd");
         dir.mkpath(path);
         QString name = "log_" + QDateTime::currentDateTime().toString("HH-mm-ss") + ".txt";
         _filename    = path + QStringLiteral("/") + name;
 
         // Clear file contents
         QFile file(_filename);
         file.open(QFile::WriteOnly);
         file.close();
     }
 
     qSetMessagePattern("[%{time yyyy-MM-dd h:mm:ss.zzz t} %{if-debug}DEBG%{endif}%{if-info}INFO%{endif}%{if-warning}WARN%{endif}%{if-critical}CRIT%{endif}%{if-fatal}FATL%{endif}] %{if-category}[%{category}]%{endif} - %{message}");
     qInstallMessageHandler(File);
 }
 
 void Logging::File(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
     QFile file(_filename);
     if (file.open(QFile::Append | QIODevice::Text))
     {
         QTextStream stream(&file);
         Write(stream, type, context, msg);
     }
 }
 
 void Logging::UseStdout()
 {
     qSetMessagePattern("[%{time yyyy-MM-dd h:mm:ss.zzz t} %{if-debug}DEBG%{endif}%{if-info}INFO%{endif}%{if-warning}WARN%{endif}%{if-critical}CRIT%{endif}%{if-fatal}FATL%{endif}] %{if-category}[%{category}]%{endif} - %{message}");
     qInstallMessageHandler(Stdout);
 }
 
 void Logging::Stdout(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
     QTextStream stream(stdout, QIODevice::WriteOnly);
     Write(stream, type, context, msg);
 }
 
 void Logging::UseStderr()
 {
     qInstallMessageHandler(Stderr);
 }
 
 void Logging::Stderr(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
     QTextStream stream(stderr, QIODevice::WriteOnly);
     Write(stream, type,context,  msg);
 }
 
 void Logging::Write(QTextStream &stream, QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {    
 
     stream << QDateTime::currentDateTime().toString("[yyyy-MM-ddThh:mm:ss.zzz t ");
 
     switch (type)
     {
         case QtInfoMsg:
             stream << "INFO ]";
             break;
         case QtDebugMsg:
             stream << "DEBG ]";
             break;
         case QtWarningMsg:
             stream << "WARN ]";
             break;
         case QtCriticalMsg:
             stream << "CRIT ]";
             break;
         case QtFatalMsg:
             stream << "FATL ]";
             break;
         default:
             stream << "UNKN ]";
     }
 
 
     stream << "[" << qSetFieldWidth(30) << context.category << qSetFieldWidth(0) << "] - ";
     stream << msg << endl;
     //stream << qFormatLogMessage(type, context, msg) << endl;
 }
 
 void Logging::UseDefault()
 {
-    qInstallMessageHandler(0);
+    qInstallMessageHandler(nullptr);
 }
 
 void Logging::Disable()
 {
     qInstallMessageHandler(Disabled);
 }
 
 void Logging::Disabled(QtMsgType, const QMessageLogContext &, const QString &)
 {
 }
 
 void Logging::SyncFilterRules()
 {
     QString rules = QString("org.kde.kstars.ekos.debug=%1\n"
                             "org.kde.kstars.indi.debug=%2\n"
                             "org.kde.kstars.ekos.mount.debug=%3\n"
                             "org.kde.kstars.ekos.capture.debug=%4\n"
                             "org.kde.kstars.ekos.focus.debug=%5\n"
                             "org.kde.kstars.ekos.guide.debug=%6\n"
                             "org.kde.kstars.ekos.align.debug=%7\n"
                             "org.kde.kstars.ekos.mount.debug=%8\n"
                             "org.kde.kstars.ekos.scheduler.debug=%9\n"
                             "org.kde.kstars.debug=%1").arg(
                             Options::verboseLogging() ? "true" : "false",
                             Options::iNDILogging() ? "true" : "false",
                             Options::fITSLogging() ? "true" : "false",
                             Options::captureLogging() ? "true" : "false",
                             Options::focusLogging() ? "true" : "false",
                             Options::guideLogging() ? "true" : "false",
                             Options::alignmentLogging() ? "true" : "false",
                             Options::mountLogging() ? "true" : "false",
                             Options::schedulerLogging() ? "true" : "false"
                             );
 
     QLoggingCategory::setFilterRules(rules);
 }
 
 /**
   This method provides a centralized location for the default paths to important external files used in the Options
   on different operating systems.  Note that on OS X, if the user builds the app without indi, astrometry, and xplanet internally
   then the options below will be used.  If the user drags the app from a dmg and has to install the KStars data directory,
   then most of these paths will be overwritten since it is preferrred to use the internal versions.
 **/
 
 QString getDefaultPath(QString option)
 {
     QString snap = QProcessEnvironment::systemEnvironment().value("SNAP");
 
     if (option == "fitsDir")
     {
         return QDir::homePath();
     }
     else if (option == "indiServer")
     {
 #ifdef Q_OS_OSX
         return "/usr/local/bin/indiserver";
 #endif
         return snap + "/usr/bin/indiserver";
     }
     else if (option == "indiDriversDir")
     {
 #ifdef Q_OS_OSX
         return "/usr/local/share/indi";
 #elif defined(Q_OS_LINUX)
         return snap + "/usr/share/indi";
 #else
         return QStandardPaths::locate(QStandardPaths::GenericDataLocation, "indi", QStandardPaths::LocateDirectory);
 #endif
     }
     else if (option == "AstrometrySolverBinary")
     {
 #ifdef Q_OS_OSX
         return "/usr/local/bin/solve-field";
 #endif
         return snap + "/usr/bin/solve-field";
     }
     else if (option == "AstrometryWCSInfo")
     {
 #ifdef Q_OS_OSX
         return "/usr/local/bin/wcsinfo";
 #endif
         return snap + "/usr/bin/wcsinfo";
     }
     else if (option == "AstrometryConfFile")
     {
 #ifdef Q_OS_OSX
         return "/usr/local/etc/astrometry.cfg";
 #endif
         return snap + "/etc/astrometry.cfg";
     }
     else if (option == "XplanetPath")
     {
 #ifdef Q_OS_OSX
         return "/usr/local/bin/xplanet";
 #endif
         return snap + "/usr/bin/xplanet";
     }
 
     return QString();
 }
 
 #ifdef Q_OS_OSX
 bool copyDataFolderFromAppBundleIfNeeded() //The method returns true if the data directory is good to go.
 {
     QString dataLocation =
         QStandardPaths::locate(QStandardPaths::GenericDataLocation, "kstars", QStandardPaths::LocateDirectory);
     if (dataLocation.isEmpty()) //If there is no kstars user data directory
     {
         QPointer<KSWizard> wizard = new KSWizard(new QFrame());
         wizard->exec(); //This will pause the startup until the user installs the data directory from the Wizard.
 
         dataLocation =
             QStandardPaths::locate(QStandardPaths::GenericDataLocation, "kstars", QStandardPaths::LocateDirectory);
         if (dataLocation.isEmpty())
             return false;
 
         //This sets some important OS X options.
         Options::setIndiServerIsInternal(true);
         Options::setIndiServer("*Internal INDI Server*");
         Options::setIndiDriversAreInternal(true);
         Options::setIndiDriversDir("*Internal INDI Drivers*");
         Options::setAstrometrySolverIsInternal(true);
         Options::setAstrometrySolverBinary("*Internal Solver*");
         Options::setAstrometryConfFileIsInternal(true);
         Options::setAstrometryConfFile("*Internal astrometry.cfg*");
         Options::setAstrometryWCSIsInternal(true);
         Options::setAstrometryWCSInfo("*Internal wcsinfo*");
         Options::setAstrometryUseNoFITS2FITS(false);
         Options::setXplanetIsInternal(true);
         Options::setXplanetPath("*Internal XPlanet*");
         Options::setRunStartupWizard(false); //don't run on startup because we are doing it now.
 
         return true; //This means the data directory is good to go now that we created it from the default.
     }
     return true; //This means the data directory was good to go from the start and the wizard did not run.
 }
 
 void configureDefaultAstrometry()
 {
     QDir writableDir;
     QString astrometryPath = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + "/Astrometry/";
     if (!astrometryPath.isEmpty())
     {
         writableDir.mkdir(astrometryPath);
         astrometryPath =
             QStandardPaths::locate(QStandardPaths::GenericDataLocation, "Astrometry", QStandardPaths::LocateDirectory);
         if (astrometryPath.isEmpty())
             KMessageBox::sorry(
                 0, i18n("Error!  The Astrometry Index File Directory does not exist and was not able to be created."));
         else
         {
             QString confPath = QCoreApplication::applicationDirPath() + "/astrometry/bin/astrometry.cfg";
             QFile confFile(confPath);
             QString contents;
             if (confFile.open(QIODevice::ReadOnly) == false)
                 KMessageBox::error(0, i18n("Internal Astrometry Configuration File Read Error."));
             else
             {
                 QTextStream in(&confFile);
                 QString line;
                 bool foundPathBefore   = false;
                 bool fileNeedsUpdating = false;
                 while (!in.atEnd())
                 {
                     line = in.readLine();
                     if (line.trimmed().startsWith(QLatin1String("add_path")))
                     {
                         if (!foundPathBefore) //This will ensure there is not more than one add_path line in the file.
                         {
                             foundPathBefore = true;
                             QString dataDir = line.trimmed().mid(9).trimmed();
                             if (dataDir != astrometryPath) //Update to the correct path.
                             {
                                 contents += "add_path " + astrometryPath + '\n';
                                 fileNeedsUpdating = true;
                             }
                         }
                     }
                     else
                     {
                         contents += line + '\n';
                     }
                 }
                 confFile.close();
                 if (fileNeedsUpdating)
                 {
                     if (confFile.open(QIODevice::WriteOnly) == false)
                         KMessageBox::error(0, i18n("Internal Astrometry Configuration File Write Error."));
                     else
                     {
                         QTextStream out(&confFile);
                         out << contents;
                         confFile.close();
                     }
                 }
             }
         }
     }
 }
 
 bool copyRecursively(QString sourceFolder, QString destFolder)
 {
     bool success = false;
     QDir sourceDir(sourceFolder);
 
     if (!sourceDir.exists())
         return false;
 
     QDir destDir(destFolder);
     if (!destDir.exists())
         destDir.mkdir(destFolder);
 
     QStringList files = sourceDir.entryList(QDir::Files);
     for (int i = 0; i < files.count(); i++)
     {
         QString srcName  = sourceFolder + QDir::separator() + files[i];
         QString destName = destFolder + QDir::separator() + files[i];
         success          = QFile::copy(srcName, destName);
         if (!success)
             return false;
     }
 
     files.clear();
     files = sourceDir.entryList(QDir::AllDirs | QDir::NoDotAndDotDot);
     for (int i = 0; i < files.count(); i++)
     {
         QString srcName  = sourceFolder + QDir::separator() + files[i];
         QString destName = destFolder + QDir::separator() + files[i];
         success          = copyRecursively(srcName, destName);
         if (!success)
             return false;
     }
 
     return true;
 }
 #endif
 
 QByteArray getJPLQueryString(const QByteArray &kind, const QByteArray &dataFields, const QVector<JPLFilter> &filters)
 {
     QByteArray query("obj_group=all&obj_kind=" + kind + "&obj_numbered=num&OBJ_field=0&ORB_field=0");
 
     // Apply filters:
     for (int i = 0; i < filters.length(); i++)
     {
         QString f = QString::number(i + 1);
         query += "&c" + f + "_group=OBJ&c1_item=" + filters[i].item + "&c" + f + "_op=" + filters[i].op + "&c" + f +
                  "_value=" + filters[i].value;
     }
 
     // Apply query data fields...
     query += "&c_fields=" + dataFields;
 
     query += "&table_format=CSV&max_rows=10&format_option=full&query=Generate%20Table&."
              "cgifields=format_option&.cgifields=field_list&.cgifields=obj_kind&.cgifie"
              "lds=obj_group&.cgifields=obj_numbered&.cgifields=combine_mode&.cgifields="
              "ast_orbit_class&.cgifields=table_format&.cgifields=ORB_field_set&.cgifiel"
              "ds=OBJ_field_set&.cgifields=preset_field_set&.cgifields=com_orbit_class";
 
     return query;
 }
 }
diff --git a/kstars/auxiliary/qcustomplot.cpp b/kstars/auxiliary/qcustomplot.cpp
index c8183e7e9..6faa812ee 100644
--- a/kstars/auxiliary/qcustomplot.cpp
+++ b/kstars/auxiliary/qcustomplot.cpp
@@ -1,31213 +1,31213 @@
 /***************************************************************************
 **                                                                        **
 **  QCustomPlot, an easy to use, modern plotting widget for Qt            **
 **  Copyright (C) 2011-2016 Emanuel Eichhammer                            **
 **                                                                        **
 **  This program is free software: you can redistribute it and/or modify  **
 **  it under the terms of the GNU General Public License as published by  **
 **  the Free Software Foundation, either version 3 of the License, or     **
 **  (at your option) any later version.                                   **
 **                                                                        **
 **  This program is distributed in the hope that it will be useful,       **
 **  but WITHOUT ANY WARRANTY; without even the implied warranty of        **
 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         **
 **  GNU General Public License for more details.                          **
 **                                                                        **
 **  You should have received a copy of the GNU General Public License     **
 **  along with this program.  If not, see http://www.gnu.org/licenses/.   **
 **                                                                        **
 ****************************************************************************
 **           Author: Emanuel Eichhammer                                   **
 **  Website/Contact: http://www.qcustomplot.com/                          **
 **             Date: 13.09.16                                             **
 **          Version: 2.0.0-beta                                           **
 ****************************************************************************/
 
 #include "qcustomplot.h"
 
 /* including file 'src/vector2d.cpp', size 7340                              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPVector2D
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPVector2D
   \brief Represents two doubles as a mathematical 2D vector
 
   This class acts as a replacement for QVector2D with the advantage of double precision instead of
   single, and some convenience methods tailored for the QCustomPlot library.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn void QCPVector2D::setX(double x)
 
   Sets the x coordinate of this vector to \a x.
 
   \see setY
 */
 
 /*! \fn void QCPVector2D::setY(double y)
 
   Sets the y coordinate of this vector to \a y.
 
   \see setX
 */
 
 /*! \fn double QCPVector2D::length() const
 
   Returns the length of this vector.
 
   \see lengthSquared
 */
 
 /*! \fn double QCPVector2D::lengthSquared() const
 
   Returns the squared length of this vector. In some situations, e.g. when just trying to find the
   shortest vector of a group, this is faster than calculating \ref length, because it avoids
   calculation of a square root.
 
   \see length
 */
 
 /*! \fn QPoint QCPVector2D::toPoint() const
 
   Returns a QPoint which has the x and y coordinates of this vector, truncating any floating point
   information.
 
   \see toPointF
 */
 
 /*! \fn QPointF QCPVector2D::toPointF() const
 
   Returns a QPointF which has the x and y coordinates of this vector.
 
   \see toPoint
 */
 
 /*! \fn bool QCPVector2D::isNull() const
 
   Returns whether this vector is null. A vector is null if \c qIsNull returns true for both x and y
   coordinates, i.e. if both are binary equal to 0.
 */
 
 /*! \fn QCPVector2D QCPVector2D::perpendicular() const
 
   Returns a vector perpendicular to this vector, with the same length.
 */
 
 /*! \fn double QCPVector2D::dot() const
 
   Returns the dot/scalar product of this vector with the specified vector \a vec.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a QCPVector2D object and initializes the x and y coordinates to 0.
 */
 QCPVector2D::QCPVector2D() : mX(0), mY(0)
 {
 }
 
 /*!
   Creates a QCPVector2D object and initializes the \a x and \a y coordinates with the specified
   values.
 */
 QCPVector2D::QCPVector2D(double x, double y) : mX(x), mY(y)
 {
 }
 
 /*!
   Creates a QCPVector2D object and initializes the x and y coordinates respective coordinates of
   the specified \a point.
 */
 QCPVector2D::QCPVector2D(const QPoint &point) : mX(point.x()), mY(point.y())
 {
 }
 
 /*!
   Creates a QCPVector2D object and initializes the x and y coordinates respective coordinates of
   the specified \a point.
 */
 QCPVector2D::QCPVector2D(const QPointF &point) : mX(point.x()), mY(point.y())
 {
 }
 
 /*!
   Normalizes this vector. After this operation, the length of the vector is equal to 1.
 
   \see normalized, length, lengthSquared
 */
 void QCPVector2D::normalize()
 {
     double len = length();
     mX /= len;
     mY /= len;
 }
 
 /*!
   Returns a normalized version of this vector. The length of the returned vector is equal to 1.
 
   \see normalize, length, lengthSquared
 */
 QCPVector2D QCPVector2D::normalized() const
 {
     QCPVector2D result(mX, mY);
     result.normalize();
     return result;
 }
 
 /*! \overload
 
   Returns the squared shortest distance of this vector (interpreted as a point) to the finite line
   segment given by \a start and \a end.
 
   \see distanceToStraightLine
 */
 double QCPVector2D::distanceSquaredToLine(const QCPVector2D &start, const QCPVector2D &end) const
 {
     QCPVector2D v(end - start);
     double vLengthSqr = v.lengthSquared();
     if (!qFuzzyIsNull(vLengthSqr))
     {
         double mu = v.dot(*this - start) / vLengthSqr;
         if (mu < 0)
             return (*this - start).lengthSquared();
         else if (mu > 1)
             return (*this - end).lengthSquared();
         else
             return ((start + mu * v) - *this).lengthSquared();
     }
     else
         return (*this - start).lengthSquared();
 }
 
 /*! \overload
 
   Returns the squared shortest distance of this vector (interpreted as a point) to the finite line
   segment given by \a line.
 
   \see distanceToStraightLine
 */
 double QCPVector2D::distanceSquaredToLine(const QLineF &line) const
 {
     return distanceSquaredToLine(QCPVector2D(line.p1()), QCPVector2D(line.p2()));
 }
 
 /*!
   Returns the shortest distance of this vector (interpreted as a point) to the infinite straight
   line given by a \a base point and a \a direction vector.
 
   \see distanceSquaredToLine
 */
 double QCPVector2D::distanceToStraightLine(const QCPVector2D &base, const QCPVector2D &direction) const
 {
     return qAbs((*this - base).dot(direction.perpendicular())) / direction.length();
 }
 
 /*!
   Scales this vector by the given \a factor, i.e. the x and y components are multiplied by \a
   factor.
 */
 QCPVector2D &QCPVector2D::operator*=(double factor)
 {
     mX *= factor;
     mY *= factor;
     return *this;
 }
 
 /*!
   Scales this vector by the given \a divisor, i.e. the x and y components are divided by \a
   divisor.
 */
 QCPVector2D &QCPVector2D::operator/=(double divisor)
 {
     mX /= divisor;
     mY /= divisor;
     return *this;
 }
 
 /*!
   Adds the given \a vector to this vector component-wise.
 */
 QCPVector2D &QCPVector2D::operator+=(const QCPVector2D &vector)
 {
     mX += vector.mX;
     mY += vector.mY;
     return *this;
 }
 
 /*!
   subtracts the given \a vector from this vector component-wise.
 */
 QCPVector2D &QCPVector2D::operator-=(const QCPVector2D &vector)
 {
     mX -= vector.mX;
     mY -= vector.mY;
     return *this;
 }
 /* end of 'src/vector2d.cpp' */
 
 /* including file 'src/painter.cpp', size 8670                               */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPPainter
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPPainter
   \brief QPainter subclass used internally
 
   This QPainter subclass is used to provide some extended functionality e.g. for tweaking position
   consistency between antialiased and non-antialiased painting. Further it provides workarounds
   for QPainter quirks.
 
   \warning This class intentionally hides non-virtual functions of QPainter, e.g. setPen, save and
   restore. So while it is possible to pass a QCPPainter instance to a function that expects a
   QPainter pointer, some of the workarounds and tweaks will be unavailable to the function (because
   it will call the base class implementations of the functions actually hidden by QCPPainter).
 */
 
 /*!
   Creates a new QCPPainter instance and sets default values
 */
 QCPPainter::QCPPainter() : QPainter(), mModes(pmDefault), mIsAntialiasing(false)
 {
     // don't setRenderHint(QPainter::NonCosmeticDefautPen) here, because painter isn't active yet and
     // a call to begin() will follow
 }
 
 /*!
   Creates a new QCPPainter instance on the specified paint \a device and sets default values. Just
   like the analogous QPainter constructor, begins painting on \a device immediately.
 
   Like \ref begin, this method sets QPainter::NonCosmeticDefaultPen in Qt versions before Qt5.
 */
 QCPPainter::QCPPainter(QPaintDevice *device) : QPainter(device), mModes(pmDefault), mIsAntialiasing(false)
 {
 #if QT_VERSION <      \
     QT_VERSION_CHECK( \
         5, 0,         \
         0) // before Qt5, default pens used to be cosmetic if NonCosmeticDefaultPen flag isn't set. So we set it to get consistency across Qt versions.
     if (isActive())
         setRenderHint(QPainter::NonCosmeticDefaultPen);
 #endif
 }
 
 /*!
   Sets the pen of the painter and applies certain fixes to it, depending on the mode of this
   QCPPainter.
 
   \note this function hides the non-virtual base class implementation.
 */
 void QCPPainter::setPen(const QPen &pen)
 {
     QPainter::setPen(pen);
     if (mModes.testFlag(pmNonCosmetic))
         makeNonCosmetic();
 }
 
 /*! \overload
 
   Sets the pen (by color) of the painter and applies certain fixes to it, depending on the mode of
   this QCPPainter.
 
   \note this function hides the non-virtual base class implementation.
 */
 void QCPPainter::setPen(const QColor &color)
 {
     QPainter::setPen(color);
     if (mModes.testFlag(pmNonCosmetic))
         makeNonCosmetic();
 }
 
 /*! \overload
 
   Sets the pen (by style) of the painter and applies certain fixes to it, depending on the mode of
   this QCPPainter.
 
   \note this function hides the non-virtual base class implementation.
 */
 void QCPPainter::setPen(Qt::PenStyle penStyle)
 {
     QPainter::setPen(penStyle);
     if (mModes.testFlag(pmNonCosmetic))
         makeNonCosmetic();
 }
 
 /*! \overload
 
   Works around a Qt bug introduced with Qt 4.8 which makes drawing QLineF unpredictable when
   antialiasing is disabled. Thus when antialiasing is disabled, it rounds the \a line to
   integer coordinates and then passes it to the original drawLine.
 
   \note this function hides the non-virtual base class implementation.
 */
 void QCPPainter::drawLine(const QLineF &line)
 {
     if (mIsAntialiasing || mModes.testFlag(pmVectorized))
         QPainter::drawLine(line);
     else
         QPainter::drawLine(line.toLine());
 }
 
 /*!
   Sets whether painting uses antialiasing or not. Use this method instead of using setRenderHint
   with QPainter::Antialiasing directly, as it allows QCPPainter to regain pixel exactness between
   antialiased and non-antialiased painting (Since Qt < 5.0 uses slightly different coordinate systems for
   AA/Non-AA painting).
 */
 void QCPPainter::setAntialiasing(bool enabled)
 {
     setRenderHint(QPainter::Antialiasing, enabled);
     if (mIsAntialiasing != enabled)
     {
         mIsAntialiasing = enabled;
         if (!mModes.testFlag(pmVectorized)) // antialiasing half-pixel shift only needed for rasterized outputs
         {
             if (mIsAntialiasing)
                 translate(0.5, 0.5);
             else
                 translate(-0.5, -0.5);
         }
     }
 }
 
 /*!
   Sets the mode of the painter. This controls whether the painter shall adjust its
   fixes/workarounds optimized for certain output devices.
 */
 void QCPPainter::setModes(QCPPainter::PainterModes modes)
 {
     mModes = modes;
 }
 
 /*!
   Sets the QPainter::NonCosmeticDefaultPen in Qt versions before Qt5 after beginning painting on \a
   device. This is necessary to get cosmetic pen consistency across Qt versions, because since Qt5,
   all pens are non-cosmetic by default, and in Qt4 this render hint must be set to get that
   behaviour.
 
   The Constructor \ref QCPPainter(QPaintDevice *device) which directly starts painting also sets
   the render hint as appropriate.
 
   \note this function hides the non-virtual base class implementation.
 */
 bool QCPPainter::begin(QPaintDevice *device)
 {
     bool result = QPainter::begin(device);
 #if QT_VERSION <      \
     QT_VERSION_CHECK( \
         5, 0,         \
         0) // before Qt5, default pens used to be cosmetic if NonCosmeticDefaultPen flag isn't set. So we set it to get consistency across Qt versions.
     if (result)
         setRenderHint(QPainter::NonCosmeticDefaultPen);
 #endif
     return result;
 }
 
 /*! \overload
 
   Sets the mode of the painter. This controls whether the painter shall adjust its
   fixes/workarounds optimized for certain output devices.
 */
 void QCPPainter::setMode(QCPPainter::PainterMode mode, bool enabled)
 {
     if (!enabled && mModes.testFlag(mode))
         mModes &= ~mode;
     else if (enabled && !mModes.testFlag(mode))
         mModes |= mode;
 }
 
 /*!
   Saves the painter (see QPainter::save). Since QCPPainter adds some new internal state to
   QPainter, the save/restore functions are reimplemented to also save/restore those members.
 
   \note this function hides the non-virtual base class implementation.
 
   \see restore
 */
 void QCPPainter::save()
 {
     mAntialiasingStack.push(mIsAntialiasing);
     QPainter::save();
 }
 
 /*!
   Restores the painter (see QPainter::restore). Since QCPPainter adds some new internal state to
   QPainter, the save/restore functions are reimplemented to also save/restore those members.
 
   \note this function hides the non-virtual base class implementation.
 
   \see save
 */
 void QCPPainter::restore()
 {
     if (!mAntialiasingStack.isEmpty())
         mIsAntialiasing = mAntialiasingStack.pop();
     else
         qDebug() << Q_FUNC_INFO << "Unbalanced save/restore";
     QPainter::restore();
 }
 
 /*!
   Changes the pen width to 1 if it currently is 0. This function is called in the \ref setPen
   overrides when the \ref pmNonCosmetic mode is set.
 */
 void QCPPainter::makeNonCosmetic()
 {
     if (qFuzzyIsNull(pen().widthF()))
     {
         QPen p = pen();
         p.setWidth(1);
         QPainter::setPen(p);
     }
 }
 /* end of 'src/painter.cpp' */
 
 /* including file 'src/paintbuffer.cpp', size 18502                          */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAbstractPaintBuffer
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAbstractPaintBuffer
   \brief The abstract base class for paint buffers, which define the rendering backend
 
   This abstract base class defines the basic interface that a paint buffer needs to provide in
   order to be usable by QCustomPlot.
 
   A paint buffer manages both a surface to draw onto, and the matching paint device. The size of
   the surface can be changed via \ref setSize. External classes (\ref QCustomPlot and \ref
   QCPLayer) request a painter via \ref startPainting and then perform the draw calls. Once the
   painting is complete, \ref donePainting is called, so the paint buffer implementation can do
   clean up if necessary. Before rendering a frame, each paint buffer is usually filled with a color
   using \ref clear (usually the color is \c Qt::transparent), to remove the contents of the
   previous frame.
 
   The simplest paint buffer implementation is \ref QCPPaintBufferPixmap which allows regular
   software rendering via the raster engine. Hardware accelerated rendering via pixel buffers and
   frame buffer objects is provided by \ref QCPPaintBufferGlPbuffer and \ref QCPPaintBufferGlFbo.
   They are used automatically if \ref QCustomPlot::setOpenGl is enabled.
 */
 
 /* start documentation of pure virtual functions */
 
 /*! \fn virtual QCPPainter *QCPAbstractPaintBuffer::startPainting() = 0
 
   Returns a \ref QCPPainter which is ready to draw to this buffer. The ownership and thus the
   responsibility to delete the painter after the painting operations are complete is given to the
   caller of this method.
 
   Once you are done using the painter, delete the painter and call \ref donePainting.
 
   While a painter generated with this method is active, you must not call \ref setSize, \ref
   setDevicePixelRatio or \ref clear.
 
   This method may return 0, if a painter couldn't be activated on the buffer. This usually
   indicates a problem with the respective painting backend.
 */
 
 /*! \fn virtual void QCPAbstractPaintBuffer::draw(QCPPainter *painter) const = 0
 
   Draws the contents of this buffer with the provided \a painter. This is the method that is used
   to finally join all paint buffers and draw them onto the screen.
 */
 
 /*! \fn virtual void QCPAbstractPaintBuffer::clear(const QColor &color) = 0
 
   Fills the entire buffer with the provided \a color. To have an empty transparent buffer, use the
   named color \c Qt::transparent.
 
   This method must not be called if there is currently a painter (acquired with \ref startPainting)
   active.
 */
 
 /*! \fn virtual void QCPAbstractPaintBuffer::reallocateBuffer() = 0
 
   Reallocates the internal buffer with the currently configured size (\ref setSize) and device
   pixel ratio, if applicable (\ref setDevicePixelRatio). It is called as soon as any of those
   properties are changed on this paint buffer.
 
   \note Subclasses of \ref QCPAbstractPaintBuffer must call their reimplementation of this method
   in their constructor, to perform the first allocation (this can not be done by the base class
   because calling pure virtual methods in base class constructors is not possible).
 */
 
 /* end documentation of pure virtual functions */
 /* start documentation of inline functions */
 
 /*! \fn virtual void QCPAbstractPaintBuffer::donePainting()
 
   If you have acquired a \ref QCPPainter to paint onto this paint buffer via \ref startPainting,
   call this method as soon as you are done with the painting operations and have deleted the
   painter.
 
   paint buffer subclasses may use this method to perform any type of cleanup that is necessary. The
   default implementation does nothing.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a paint buffer and initializes it with the provided \a size and \a devicePixelRatio.
 
   Subclasses must call their \ref reallocateBuffer implementation in their respective constructors.
 */
 QCPAbstractPaintBuffer::QCPAbstractPaintBuffer(const QSize &size, double devicePixelRatio)
     : mSize(size), mDevicePixelRatio(devicePixelRatio), mInvalidated(true)
 {
 }
 
 QCPAbstractPaintBuffer::~QCPAbstractPaintBuffer()
 {
 }
 
 /*!
   Sets the paint buffer size.
 
   The buffer is reallocated (by calling \ref reallocateBuffer), so any painters that were obtained
   by \ref startPainting are invalidated and must not be used after calling this method.
 
   If \a size is already the current buffer size, this method does nothing.
 */
 void QCPAbstractPaintBuffer::setSize(const QSize &size)
 {
     if (mSize != size)
     {
         mSize = size;
         reallocateBuffer();
     }
 }
 
 /*!
   Sets the invalidated flag to \a invalidated.
 
   This mechanism is used internally in conjunction with isolated replotting of \ref QCPLayer
   instances (in \ref QCPLayer::lmBuffered mode). If \ref QCPLayer::replot is called on a buffered
   layer, i.e. an isolated repaint of only that layer (and its dedicated paint buffer) is requested,
   QCustomPlot will decide depending on the invalidated flags of other paint buffers whether it also
   replots them, instead of only the layer on which the replot was called.
 
   The invalidated flag is set to true when \ref QCPLayer association has changed, i.e. if layers
   were added or removed from this buffer, or if they were reordered. It is set to false as soon as
   all associated \ref QCPLayer instances are drawn onto the buffer.
 
   Under normal circumstances, it is not necessary to manually call this method.
 */
 void QCPAbstractPaintBuffer::setInvalidated(bool invalidated)
 {
     mInvalidated = invalidated;
 }
 
 /*!
   Sets the device pixel ratio to \a ratio. This is useful to render on high-DPI output devices.
   The ratio is automatically set to the device pixel ratio used by the parent QCustomPlot instance.
 
   The buffer is reallocated (by calling \ref reallocateBuffer), so any painters that were obtained
   by \ref startPainting are invalidated and must not be used after calling this method.
 
   \note This method is only available for Qt versions 5.4 and higher.
 */
 void QCPAbstractPaintBuffer::setDevicePixelRatio(double ratio)
 {
     if (!qFuzzyCompare(ratio, mDevicePixelRatio))
     {
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
         mDevicePixelRatio = ratio;
         reallocateBuffer();
 #else
         qDebug() << Q_FUNC_INFO << "Device pixel ratios not supported for Qt versions before 5.4";
         mDevicePixelRatio = 1.0;
 #endif
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPPaintBufferPixmap
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPPaintBufferPixmap
   \brief A paint buffer based on QPixmap, using software raster rendering
 
   This paint buffer is the default and fall-back paint buffer which uses software rendering and
   QPixmap as internal buffer. It is used if \ref QCustomPlot::setOpenGl is false.
 */
 
 /*!
   Creates a pixmap paint buffer instancen with the specified \a size and \a devicePixelRatio, if
   applicable.
 */
 QCPPaintBufferPixmap::QCPPaintBufferPixmap(const QSize &size, double devicePixelRatio)
     : QCPAbstractPaintBuffer(size, devicePixelRatio)
 {
     QCPPaintBufferPixmap::reallocateBuffer();
 }
 
 QCPPaintBufferPixmap::~QCPPaintBufferPixmap()
 {
 }
 
 /* inherits documentation from base class */
 QCPPainter *QCPPaintBufferPixmap::startPainting()
 {
     QCPPainter *result = new QCPPainter(&mBuffer);
     result->setRenderHint(QPainter::HighQualityAntialiasing);
     return result;
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferPixmap::draw(QCPPainter *painter) const
 {
     if (painter && painter->isActive())
         painter->drawPixmap(0, 0, mBuffer);
     else
         qDebug() << Q_FUNC_INFO << "invalid or inactive painter passed";
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferPixmap::clear(const QColor &color)
 {
     mBuffer.fill(color);
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferPixmap::reallocateBuffer()
 {
     setInvalidated();
     if (!qFuzzyCompare(1.0, mDevicePixelRatio))
     {
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
         mBuffer = QPixmap(mSize * mDevicePixelRatio);
         mBuffer.setDevicePixelRatio(mDevicePixelRatio);
 #else
         qDebug() << Q_FUNC_INFO << "Device pixel ratios not supported for Qt versions before 5.4";
         mDevicePixelRatio = 1.0;
         mBuffer           = QPixmap(mSize);
 #endif
     }
     else
     {
         mBuffer = QPixmap(mSize);
     }
 }
 
 #ifdef QCP_OPENGL_PBUFFER
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPPaintBufferGlPbuffer
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPPaintBufferGlPbuffer
   \brief A paint buffer based on OpenGL pixel buffers, using hardware accelerated rendering
 
   This paint buffer is one of the OpenGL paint buffers which facilitate hardware accelerated plot
   rendering. It is based on OpenGL pixel buffers (pbuffer) and is used in Qt versions before 5.0.
   (See \ref QCPPaintBufferGlFbo used in newer Qt versions.)
 
   The OpenGL paint buffers are used if \ref QCustomPlot::setOpenGl is set to true, and if they are
   supported by the system.
 */
 
 /*!
   Creates a \ref QCPPaintBufferGlPbuffer instance with the specified \a size and \a
   devicePixelRatio, if applicable.
 
   The parameter \a multisamples defines how many samples are used per pixel. Higher values thus
   result in higher quality antialiasing. If the specified \a multisamples value exceeds the
   capability of the graphics hardware, the highest supported multisampling is used.
 */
 QCPPaintBufferGlPbuffer::QCPPaintBufferGlPbuffer(const QSize &size, double devicePixelRatio, int multisamples)
     : QCPAbstractPaintBuffer(size, devicePixelRatio), mGlPBuffer(0), mMultisamples(qMax(0, multisamples))
 {
     QCPPaintBufferGlPbuffer::reallocateBuffer();
 }
 
 QCPPaintBufferGlPbuffer::~QCPPaintBufferGlPbuffer()
 {
     if (mGlPBuffer)
         delete mGlPBuffer;
 }
 
 /* inherits documentation from base class */
 QCPPainter *QCPPaintBufferGlPbuffer::startPainting()
 {
     if (!mGlPBuffer->isValid())
     {
         qDebug() << Q_FUNC_INFO << "OpenGL frame buffer object doesn't exist, reallocateBuffer was not called?";
         return 0;
     }
 
     QCPPainter *result = new QCPPainter(mGlPBuffer);
     result->setRenderHint(QPainter::HighQualityAntialiasing);
     return result;
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferGlPbuffer::draw(QCPPainter *painter) const
 {
     if (!painter || !painter->isActive())
     {
         qDebug() << Q_FUNC_INFO << "invalid or inactive painter passed";
         return;
     }
     if (!mGlPBuffer->isValid())
     {
         qDebug() << Q_FUNC_INFO << "OpenGL pbuffer isn't valid, reallocateBuffer was not called?";
         return;
     }
     painter->drawImage(0, 0, mGlPBuffer->toImage());
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferGlPbuffer::clear(const QColor &color)
 {
     if (mGlPBuffer->isValid())
     {
         mGlPBuffer->makeCurrent();
         glClearColor(color.redF(), color.greenF(), color.blueF(), color.alphaF());
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
         mGlPBuffer->doneCurrent();
     }
     else
         qDebug() << Q_FUNC_INFO << "OpenGL pbuffer invalid or context not current";
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferGlPbuffer::reallocateBuffer()
 {
     if (mGlPBuffer)
         delete mGlPBuffer;
 
     QGLFormat format;
     format.setAlpha(true);
     format.setSamples(mMultisamples);
     mGlPBuffer = new QGLPixelBuffer(mSize, format);
 }
 #endif // QCP_OPENGL_PBUFFER
 
 #ifdef QCP_OPENGL_FBO
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPPaintBufferGlFbo
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPPaintBufferGlFbo
   \brief A paint buffer based on OpenGL frame buffers objects, using hardware accelerated rendering
 
   This paint buffer is one of the OpenGL paint buffers which facilitate hardware accelerated plot
   rendering. It is based on OpenGL frame buffer objects (fbo) and is used in Qt versions 5.0 and
   higher. (See \ref QCPPaintBufferGlPbuffer used in older Qt versions.)
 
   The OpenGL paint buffers are used if \ref QCustomPlot::setOpenGl is set to true, and if they are
   supported by the system.
 */
 
 /*!
   Creates a \ref QCPPaintBufferGlFbo instance with the specified \a size and \a devicePixelRatio,
   if applicable.
 
   All frame buffer objects shall share one OpenGL context and paint device, which need to be set up
   externally and passed via \a glContext and \a glPaintDevice. The set-up is done in \ref
   QCustomPlot::setupOpenGl and the context and paint device are managed by the parent QCustomPlot
   instance.
 */
 QCPPaintBufferGlFbo::QCPPaintBufferGlFbo(const QSize &size, double devicePixelRatio,
                                          QWeakPointer<QOpenGLContext> glContext,
                                          QWeakPointer<QOpenGLPaintDevice> glPaintDevice)
     : QCPAbstractPaintBuffer(size, devicePixelRatio), mGlContext(glContext), mGlPaintDevice(glPaintDevice),
       mGlFrameBuffer(0)
 {
     QCPPaintBufferGlFbo::reallocateBuffer();
 }
 
 QCPPaintBufferGlFbo::~QCPPaintBufferGlFbo()
 {
     if (mGlFrameBuffer)
         delete mGlFrameBuffer;
 }
 
 /* inherits documentation from base class */
 QCPPainter *QCPPaintBufferGlFbo::startPainting()
 {
     if (mGlPaintDevice.isNull())
     {
         qDebug() << Q_FUNC_INFO << "OpenGL paint device doesn't exist";
         return 0;
     }
     if (!mGlFrameBuffer)
     {
         qDebug() << Q_FUNC_INFO << "OpenGL frame buffer object doesn't exist, reallocateBuffer was not called?";
         return 0;
     }
 
     if (QOpenGLContext::currentContext() != mGlContext.data())
         mGlContext.data()->makeCurrent(mGlContext.data()->surface());
     mGlFrameBuffer->bind();
     QCPPainter *result = new QCPPainter(mGlPaintDevice.data());
     result->setRenderHint(QPainter::HighQualityAntialiasing);
     return result;
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferGlFbo::donePainting()
 {
     if (mGlFrameBuffer && mGlFrameBuffer->isBound())
         mGlFrameBuffer->release();
     else
         qDebug() << Q_FUNC_INFO << "Either OpenGL frame buffer not valid or was not bound";
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferGlFbo::draw(QCPPainter *painter) const
 {
     if (!painter || !painter->isActive())
     {
         qDebug() << Q_FUNC_INFO << "invalid or inactive painter passed";
         return;
     }
     if (!mGlFrameBuffer)
     {
         qDebug() << Q_FUNC_INFO << "OpenGL frame buffer object doesn't exist, reallocateBuffer was not called?";
         return;
     }
     painter->drawImage(0, 0, mGlFrameBuffer->toImage());
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferGlFbo::clear(const QColor &color)
 {
     if (mGlContext.isNull())
     {
         qDebug() << Q_FUNC_INFO << "OpenGL context doesn't exist";
         return;
     }
     if (!mGlFrameBuffer)
     {
         qDebug() << Q_FUNC_INFO << "OpenGL frame buffer object doesn't exist, reallocateBuffer was not called?";
         return;
     }
 
     if (QOpenGLContext::currentContext() != mGlContext.data())
         mGlContext.data()->makeCurrent(mGlContext.data()->surface());
     mGlFrameBuffer->bind();
     glClearColor(color.redF(), color.greenF(), color.blueF(), color.alphaF());
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     mGlFrameBuffer->release();
 }
 
 /* inherits documentation from base class */
 void QCPPaintBufferGlFbo::reallocateBuffer()
 {
     // release and delete possibly existing framebuffer:
     if (mGlFrameBuffer)
     {
         if (mGlFrameBuffer->isBound())
             mGlFrameBuffer->release();
         delete mGlFrameBuffer;
         mGlFrameBuffer = 0;
     }
 
     if (mGlContext.isNull())
     {
         qDebug() << Q_FUNC_INFO << "OpenGL context doesn't exist";
         return;
     }
     if (mGlPaintDevice.isNull())
     {
         qDebug() << Q_FUNC_INFO << "OpenGL paint device doesn't exist";
         return;
     }
 
     // create new fbo with appropriate size:
     mGlContext.data()->makeCurrent(mGlContext.data()->surface());
     QOpenGLFramebufferObjectFormat frameBufferFormat;
     frameBufferFormat.setSamples(mGlContext.data()->format().samples());
     frameBufferFormat.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
     mGlFrameBuffer = new QOpenGLFramebufferObject(mSize * mDevicePixelRatio, frameBufferFormat);
     if (mGlPaintDevice.data()->size() != mSize * mDevicePixelRatio)
         mGlPaintDevice.data()->setSize(mSize * mDevicePixelRatio);
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
     mGlPaintDevice.data()->setDevicePixelRatio(mDevicePixelRatio);
 #endif
 }
 #endif // QCP_OPENGL_FBO
 /* end of 'src/paintbuffer.cpp' */
 
 /* including file 'src/layer.cpp', size 37064                                */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLayer
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPLayer
   \brief A layer that may contain objects, to control the rendering order
 
   The Layering system of QCustomPlot is the mechanism to control the rendering order of the
   elements inside the plot.
 
   It is based on the two classes QCPLayer and QCPLayerable. QCustomPlot holds an ordered list of
   one or more instances of QCPLayer (see QCustomPlot::addLayer, QCustomPlot::layer,
   QCustomPlot::moveLayer, etc.). When replotting, QCustomPlot goes through the list of layers
   bottom to top and successively draws the layerables of the layers into the paint buffer(s).
 
   A QCPLayer contains an ordered list of QCPLayerable instances. QCPLayerable is an abstract base
   class from which almost all visible objects derive, like axes, grids, graphs, items, etc.
 
   \section qcplayer-defaultlayers Default layers
 
   Initially, QCustomPlot has six layers: "background", "grid", "main", "axes", "legend" and
   "overlay" (in that order). On top is the "overlay" layer, which only contains the QCustomPlot's
   selection rect (\ref QCustomPlot::selectionRect). The next two layers "axes" and "legend" contain
   the default axes and legend, so they will be drawn above plottables. In the middle, there is the
   "main" layer. It is initially empty and set as the current layer (see
   QCustomPlot::setCurrentLayer). This means, all new plottables, items etc. are created on this
   layer by default. Then comes the "grid" layer which contains the QCPGrid instances (which belong
   tightly to QCPAxis, see \ref QCPAxis::grid). The Axis rect background shall be drawn behind
   everything else, thus the default QCPAxisRect instance is placed on the "background" layer. Of
   course, the layer affiliation of the individual objects can be changed as required (\ref
   QCPLayerable::setLayer).
 
   \section qcplayer-ordering Controlling the rendering order via layers
 
   Controlling the ordering of layerables in the plot is easy: Create a new layer in the position
   you want the layerable to be in, e.g. above "main", with \ref QCustomPlot::addLayer. Then set the
   current layer with \ref QCustomPlot::setCurrentLayer to that new layer and finally create the
   objects normally. They will be placed on the new layer automatically, due to the current layer
   setting. Alternatively you could have also ignored the current layer setting and just moved the
   objects with \ref QCPLayerable::setLayer to the desired layer after creating them.
 
   It is also possible to move whole layers. For example, If you want the grid to be shown in front
   of all plottables/items on the "main" layer, just move it above "main" with
   QCustomPlot::moveLayer.
 
   The rendering order within one layer is simply by order of creation or insertion. The item
   created last (or added last to the layer), is drawn on top of all other objects on that layer.
 
   When a layer is deleted, the objects on it are not deleted with it, but fall on the layer below
   the deleted layer, see QCustomPlot::removeLayer.
 
   \section qcplayer-buffering Replotting only a specific layer
 
   If the layer mode (\ref setMode) is set to \ref lmBuffered, you can replot only this specific
   layer by calling \ref replot. In certain situations this can provide better replot performance,
   compared with a full replot of all layers. Upon creation of a new layer, the layer mode is
   initialized to \ref lmLogical. The only layer that is set to \ref lmBuffered in a new \ref
   QCustomPlot instance is the "overlay" layer, containing the selection rect.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QList<QCPLayerable*> QCPLayer::children() const
 
   Returns a list of all layerables on this layer. The order corresponds to the rendering order:
   layerables with higher indices are drawn above layerables with lower indices.
 */
 
 /*! \fn int QCPLayer::index() const
 
   Returns the index this layer has in the QCustomPlot. The index is the integer number by which this layer can be
   accessed via \ref QCustomPlot::layer.
 
   Layers with higher indices will be drawn above layers with lower indices.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a new QCPLayer instance.
 
   Normally you shouldn't directly instantiate layers, use \ref QCustomPlot::addLayer instead.
 
   \warning It is not checked that \a layerName is actually a unique layer name in \a parentPlot.
   This check is only performed by \ref QCustomPlot::addLayer.
 */
 QCPLayer::QCPLayer(QCustomPlot *parentPlot, const QString &layerName)
     : QObject(parentPlot), mParentPlot(parentPlot), mName(layerName),
       mIndex(-1), // will be set to a proper value by the QCustomPlot layer creation function
       mVisible(true), mMode(lmLogical)
 {
     // Note: no need to make sure layerName is unique, because layer
     // management is done with QCustomPlot functions.
 }
 
 QCPLayer::~QCPLayer()
 {
     // If child layerables are still on this layer, detach them, so they don't try to reach back to this
     // then invalid layer once they get deleted/moved themselves. This only happens when layers are deleted
     // directly, like in the QCustomPlot destructor. (The regular layer removal procedure for the user is to
     // call QCustomPlot::removeLayer, which moves all layerables off this layer before deleting it.)
 
     while (!mChildren.isEmpty())
-        mChildren.last()->setLayer(0); // removes itself from mChildren via removeChild()
+        mChildren.last()->setLayer(nullptr); // removes itself from mChildren via removeChild()
 
     if (mParentPlot->currentLayer() == this)
         qDebug() << Q_FUNC_INFO
                  << "The parent plot's mCurrentLayer will be a dangling pointer. Should have been set to a valid layer "
                     "or 0 beforehand.";
 }
 
 /*!
   Sets whether this layer is visible or not. If \a visible is set to false, all layerables on this
   layer will be invisible.
 
   This function doesn't change the visibility property of the layerables (\ref
   QCPLayerable::setVisible), but the \ref QCPLayerable::realVisibility of each layerable takes the
   visibility of the parent layer into account.
 */
 void QCPLayer::setVisible(bool visible)
 {
     mVisible = visible;
 }
 
 /*!
   Sets the rendering mode of this layer.
 
   If \a mode is set to \ref lmBuffered for a layer, it will be given a dedicated paint buffer by
   the parent QCustomPlot instance. This means it may be replotted individually by calling \ref
   QCPLayer::replot, without needing to replot all other layers.
 
   Layers which are set to \ref lmLogical (the default) are used only to define the rendering order
   and can't be replotted individually.
 
   Note that each layer which is set to \ref lmBuffered requires additional paint buffers for the
   layers below, above and for the layer itself. This increases the memory consumption and
   (slightly) decreases the repainting speed because multiple paint buffers need to be joined. So
   you should carefully choose which layers benefit from having their own paint buffer. A typical
   example would be a layer which contains certain layerables (e.g. items) that need to be changed
   and thus replotted regularly, while all other layerables on other layers stay static. By default,
   only the topmost layer called "overlay" is in mode \ref lmBuffered, and contains the selection
   rect.
 
   \see replot
 */
 void QCPLayer::setMode(QCPLayer::LayerMode mode)
 {
     if (mMode != mode)
     {
         mMode = mode;
         if (!mPaintBuffer.isNull())
             mPaintBuffer.data()->setInvalidated();
     }
 }
 
 /*! \internal
 
   Draws the contents of this layer with the provided \a painter.
 
   \see replot, drawToPaintBuffer
 */
 void QCPLayer::draw(QCPPainter *painter)
 {
     foreach (QCPLayerable *child, mChildren)
     {
         if (child->realVisibility())
         {
             painter->save();
             painter->setClipRect(child->clipRect().translated(0, -1));
             child->applyDefaultAntialiasingHint(painter);
             child->draw(painter);
             painter->restore();
         }
     }
 }
 
 /*! \internal
 
   Draws the contents of this layer into the paint buffer which is associated with this layer. The
   association is established by the parent QCustomPlot, which manages all paint buffers (see \ref
   QCustomPlot::setupPaintBuffers).
 
   \see draw
 */
 void QCPLayer::drawToPaintBuffer()
 {
     if (!mPaintBuffer.isNull())
     {
         if (QCPPainter *painter = mPaintBuffer.data()->startPainting())
         {
             if (painter->isActive())
                 draw(painter);
             else
                 qDebug() << Q_FUNC_INFO << "paint buffer returned inactive painter";
             delete painter;
             mPaintBuffer.data()->donePainting();
         }
         else
             qDebug() << Q_FUNC_INFO << "paint buffer returned zero painter";
     }
     else
         qDebug() << Q_FUNC_INFO << "no valid paint buffer associated with this layer";
 }
 
 /*!
   If the layer mode (\ref setMode) is set to \ref lmBuffered, this method allows replotting only
   the layerables on this specific layer, without the need to replot all other layers (as a call to
   \ref QCustomPlot::replot would do).
 
   If the layer mode is \ref lmLogical however, this method simply calls \ref QCustomPlot::replot on
   the parent QCustomPlot instance.
 
   QCustomPlot also makes sure to replot all layers instead of only this one, if the layer ordering
   has changed since the last full replot and the other paint buffers were thus invalidated.
 
   \see draw
 */
 void QCPLayer::replot()
 {
     if (mMode == lmBuffered && !mParentPlot->hasInvalidatedPaintBuffers())
     {
         if (!mPaintBuffer.isNull())
         {
             mPaintBuffer.data()->clear(Qt::transparent);
             drawToPaintBuffer();
             mPaintBuffer.data()->setInvalidated(false);
             mParentPlot->update();
         }
         else
             qDebug() << Q_FUNC_INFO << "no valid paint buffer associated with this layer";
     }
     else if (mMode == lmLogical)
         mParentPlot->replot();
 }
 
 /*! \internal
 
   Adds the \a layerable to the list of this layer. If \a prepend is set to true, the layerable will
   be prepended to the list, i.e. be drawn beneath the other layerables already in the list.
 
   This function does not change the \a mLayer member of \a layerable to this layer. (Use
   QCPLayerable::setLayer to change the layer of an object, not this function.)
 
   \see removeChild
 */
 void QCPLayer::addChild(QCPLayerable *layerable, bool prepend)
 {
     if (!mChildren.contains(layerable))
     {
         if (prepend)
             mChildren.prepend(layerable);
         else
             mChildren.append(layerable);
         if (!mPaintBuffer.isNull())
             mPaintBuffer.data()->setInvalidated();
     }
     else
         qDebug() << Q_FUNC_INFO << "layerable is already child of this layer" << reinterpret_cast<quintptr>(layerable);
 }
 
 /*! \internal
 
   Removes the \a layerable from the list of this layer.
 
   This function does not change the \a mLayer member of \a layerable. (Use QCPLayerable::setLayer
   to change the layer of an object, not this function.)
 
   \see addChild
 */
 void QCPLayer::removeChild(QCPLayerable *layerable)
 {
     if (mChildren.removeOne(layerable))
     {
         if (!mPaintBuffer.isNull())
             mPaintBuffer.data()->setInvalidated();
     }
     else
         qDebug() << Q_FUNC_INFO << "layerable is not child of this layer" << reinterpret_cast<quintptr>(layerable);
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLayerable
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPLayerable
   \brief Base class for all drawable objects
 
   This is the abstract base class most visible objects derive from, e.g. plottables, axes, grid
   etc.
 
   Every layerable is on a layer (QCPLayer) which allows controlling the rendering order by stacking
   the layers accordingly.
 
   For details about the layering mechanism, see the QCPLayer documentation.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QCPLayerable *QCPLayerable::parentLayerable() const
 
   Returns the parent layerable of this layerable. The parent layerable is used to provide
   visibility hierarchies in conjunction with the method \ref realVisibility. This way, layerables
   only get drawn if their parent layerables are visible, too.
 
   Note that a parent layerable is not necessarily also the QObject parent for memory management.
   Further, a layerable doesn't always have a parent layerable, so this function may return 0.
 
   A parent layerable is set implicitly when placed inside layout elements and doesn't need to be
   set manually by the user.
 */
 
 /* end documentation of inline functions */
 /* start documentation of pure virtual functions */
 
 /*! \fn virtual void QCPLayerable::applyDefaultAntialiasingHint(QCPPainter *painter) const = 0
   \internal
 
   This function applies the default antialiasing setting to the specified \a painter, using the
   function \ref applyAntialiasingHint. It is the antialiasing state the painter is put in, when
   \ref draw is called on the layerable. If the layerable has multiple entities whose antialiasing
   setting may be specified individually, this function should set the antialiasing state of the
   most prominent entity. In this case however, the \ref draw function usually calls the specialized
   versions of this function before drawing each entity, effectively overriding the setting of the
   default antialiasing hint.
 
   <b>First example:</b> QCPGraph has multiple entities that have an antialiasing setting: The graph
   line, fills and scatters. Those can be configured via QCPGraph::setAntialiased,
   QCPGraph::setAntialiasedFill and QCPGraph::setAntialiasedScatters. Consequently, there isn't only
   the QCPGraph::applyDefaultAntialiasingHint function (which corresponds to the graph line's
   antialiasing), but specialized ones like QCPGraph::applyFillAntialiasingHint and
   QCPGraph::applyScattersAntialiasingHint. So before drawing one of those entities, QCPGraph::draw
   calls the respective specialized applyAntialiasingHint function.
 
   <b>Second example:</b> QCPItemLine consists only of a line so there is only one antialiasing
   setting which can be controlled with QCPItemLine::setAntialiased. (This function is inherited by
   all layerables. The specialized functions, as seen on QCPGraph, must be added explicitly to the
   respective layerable subclass.) Consequently it only has the normal
   QCPItemLine::applyDefaultAntialiasingHint. The \ref QCPItemLine::draw function doesn't need to
   care about setting any antialiasing states, because the default antialiasing hint is already set
   on the painter when the \ref draw function is called, and that's the state it wants to draw the
   line with.
 */
 
 /*! \fn virtual void QCPLayerable::draw(QCPPainter *painter) const = 0
   \internal
 
   This function draws the layerable with the specified \a painter. It is only called by
   QCustomPlot, if the layerable is visible (\ref setVisible).
 
   Before this function is called, the painter's antialiasing state is set via \ref
   applyDefaultAntialiasingHint, see the documentation there. Further, the clipping rectangle was
   set to \ref clipRect.
 */
 
 /* end documentation of pure virtual functions */
 /* start documentation of signals */
 
 /*! \fn void QCPLayerable::layerChanged(QCPLayer *newLayer);
 
   This signal is emitted when the layer of this layerable changes, i.e. this layerable is moved to
   a different layer.
 
   \see setLayer
 */
 
 /* end documentation of signals */
 
 /*!
   Creates a new QCPLayerable instance.
 
   Since QCPLayerable is an abstract base class, it can't be instantiated directly. Use one of the
   derived classes.
 
   If \a plot is provided, it automatically places itself on the layer named \a targetLayer. If \a
   targetLayer is an empty string, it places itself on the current layer of the plot (see \ref
   QCustomPlot::setCurrentLayer).
 
   It is possible to provide 0 as \a plot. In that case, you should assign a parent plot at a later
   time with \ref initializeParentPlot.
 
   The layerable's parent layerable is set to \a parentLayerable, if provided. Direct layerable
   parents are mainly used to control visibility in a hierarchy of layerables. This means a
   layerable is only drawn, if all its ancestor layerables are also visible. Note that \a
   parentLayerable does not become the QObject-parent (for memory management) of this layerable, \a
   plot does. It is not uncommon to set the QObject-parent to something else in the constructors of
   QCPLayerable subclasses, to guarantee a working destruction hierarchy.
 */
 QCPLayerable::QCPLayerable(QCustomPlot *plot, QString targetLayer, QCPLayerable *parentLayerable)
-    : QObject(plot), mVisible(true), mParentPlot(plot), mParentLayerable(parentLayerable), mLayer(0), mAntialiased(true)
+    : QObject(plot), mVisible(true), mParentPlot(plot), mParentLayerable(parentLayerable), mLayer(nullptr), mAntialiased(true)
 {
     if (mParentPlot)
     {
         if (targetLayer.isEmpty())
             setLayer(mParentPlot->currentLayer());
         else if (!setLayer(targetLayer))
             qDebug() << Q_FUNC_INFO << "setting QCPlayerable initial layer to" << targetLayer << "failed.";
     }
 }
 
 QCPLayerable::~QCPLayerable()
 {
     if (mLayer)
     {
         mLayer->removeChild(this);
-        mLayer = 0;
+        mLayer = nullptr;
     }
 }
 
 /*!
   Sets the visibility of this layerable object. If an object is not visible, it will not be drawn
   on the QCustomPlot surface, and user interaction with it (e.g. click and selection) is not
   possible.
 */
 void QCPLayerable::setVisible(bool on)
 {
     mVisible = on;
 }
 
 /*!
   Sets the \a layer of this layerable object. The object will be placed on top of the other objects
   already on \a layer.
 
   If \a layer is 0, this layerable will not be on any layer and thus not appear in the plot (or
   interact/receive events).
 
   Returns true if the layer of this layerable was successfully changed to \a layer.
 */
 bool QCPLayerable::setLayer(QCPLayer *layer)
 {
     return moveToLayer(layer, false);
 }
 
 /*! \overload
   Sets the layer of this layerable object by name
 
   Returns true on success, i.e. if \a layerName is a valid layer name.
 */
 bool QCPLayerable::setLayer(const QString &layerName)
 {
     if (!mParentPlot)
     {
         qDebug() << Q_FUNC_INFO << "no parent QCustomPlot set";
         return false;
     }
     if (QCPLayer *layer = mParentPlot->layer(layerName))
     {
         return setLayer(layer);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "there is no layer with name" << layerName;
         return false;
     }
 }
 
 /*!
   Sets whether this object will be drawn antialiased or not.
 
   Note that antialiasing settings may be overridden by QCustomPlot::setAntialiasedElements and
   QCustomPlot::setNotAntialiasedElements.
 */
 void QCPLayerable::setAntialiased(bool enabled)
 {
     mAntialiased = enabled;
 }
 
 /*!
   Returns whether this layerable is visible, taking the visibility of the layerable parent and the
   visibility of this layerable's layer into account. This is the method that is consulted to decide
   whether a layerable shall be drawn or not.
 
   If this layerable has a direct layerable parent (usually set via hierarchies implemented in
   subclasses, like in the case of \ref QCPLayoutElement), this function returns true only if this
   layerable has its visibility set to true and the parent layerable's \ref realVisibility returns
   true.
 */
 bool QCPLayerable::realVisibility() const
 {
     return mVisible && (!mLayer || mLayer->visible()) &&
            (!mParentLayerable || mParentLayerable.data()->realVisibility());
 }
 
 /*!
   This function is used to decide whether a click hits a layerable object or not.
 
   \a pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the
   shortest pixel distance of this point to the object. If the object is either invisible or the
   distance couldn't be determined, -1.0 is returned. Further, if \a onlySelectable is true and the
   object is not selectable, -1.0 is returned, too.
 
   If the object is represented not by single lines but by an area like a \ref QCPItemText or the
   bars of a \ref QCPBars plottable, a click inside the area should also be considered a hit. In
   these cases this function thus returns a constant value greater zero but still below the parent
   plot's selection tolerance. (typically the selectionTolerance multiplied by 0.99).
 
   Providing a constant value for area objects allows selecting line objects even when they are
   obscured by such area objects, by clicking close to the lines (i.e. closer than
   0.99*selectionTolerance).
 
   The actual setting of the selection state is not done by this function. This is handled by the
   parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified
   via the \ref selectEvent/\ref deselectEvent methods.
 
   \a details is an optional output parameter. Every layerable subclass may place any information
   in \a details. This information will be passed to \ref selectEvent when the parent QCustomPlot
   decides on the basis of this selectTest call, that the object was successfully selected. The
   subsequent call to \ref selectEvent will carry the \a details. This is useful for multi-part
   objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked
   is only done once in \ref selectTest. The result (i.e. the actually clicked part) can then be
   placed in \a details. So in the subsequent \ref selectEvent, the decision which part was
   selected doesn't have to be done a second time for a single selection operation.
 
   You may pass 0 as \a details to indicate that you are not interested in those selection details.
 
   \see selectEvent, deselectEvent, mousePressEvent, wheelEvent, QCustomPlot::setInteractions
 */
 double QCPLayerable::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(pos)
     Q_UNUSED(onlySelectable)
     Q_UNUSED(details)
     return -1.0;
 }
 
 /*! \internal
 
   Sets the parent plot of this layerable. Use this function once to set the parent plot if you have
   passed 0 in the constructor. It can not be used to move a layerable from one QCustomPlot to
   another one.
 
   Note that, unlike when passing a non-null parent plot in the constructor, this function does not
   make \a parentPlot the QObject-parent of this layerable. If you want this, call
   QObject::setParent(\a parentPlot) in addition to this function.
 
   Further, you will probably want to set a layer (\ref setLayer) after calling this function, to
   make the layerable appear on the QCustomPlot.
 
   The parent plot change will be propagated to subclasses via a call to \ref parentPlotInitialized
   so they can react accordingly (e.g. also initialize the parent plot of child layerables, like
   QCPLayout does).
 */
 void QCPLayerable::initializeParentPlot(QCustomPlot *parentPlot)
 {
     if (mParentPlot)
     {
         qDebug() << Q_FUNC_INFO << "called with mParentPlot already initialized";
         return;
     }
 
     if (!parentPlot)
         qDebug() << Q_FUNC_INFO << "called with parentPlot zero";
 
     mParentPlot = parentPlot;
     parentPlotInitialized(mParentPlot);
 }
 
 /*! \internal
 
   Sets the parent layerable of this layerable to \a parentLayerable. Note that \a parentLayerable does not
   become the QObject-parent (for memory management) of this layerable.
 
   The parent layerable has influence on the return value of the \ref realVisibility method. Only
   layerables with a fully visible parent tree will return true for \ref realVisibility, and thus be
   drawn.
 
   \see realVisibility
 */
 void QCPLayerable::setParentLayerable(QCPLayerable *parentLayerable)
 {
     mParentLayerable = parentLayerable;
 }
 
 /*! \internal
 
   Moves this layerable object to \a layer. If \a prepend is true, this object will be prepended to
   the new layer's list, i.e. it will be drawn below the objects already on the layer. If it is
   false, the object will be appended.
 
   Returns true on success, i.e. if \a layer is a valid layer.
 */
 bool QCPLayerable::moveToLayer(QCPLayer *layer, bool prepend)
 {
     if (layer && !mParentPlot)
     {
         qDebug() << Q_FUNC_INFO << "no parent QCustomPlot set";
         return false;
     }
     if (layer && layer->parentPlot() != mParentPlot)
     {
         qDebug() << Q_FUNC_INFO << "layer" << layer->name() << "is not in same QCustomPlot as this layerable";
         return false;
     }
 
     QCPLayer *oldLayer = mLayer;
     if (mLayer)
         mLayer->removeChild(this);
     mLayer = layer;
     if (mLayer)
         mLayer->addChild(this, prepend);
     if (mLayer != oldLayer)
         emit layerChanged(mLayer);
     return true;
 }
 
 /*! \internal
 
   Sets the QCPainter::setAntialiasing state on the provided \a painter, depending on the \a
   localAntialiased value as well as the overrides \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements. Which override enum this function takes into account is
   controlled via \a overrideElement.
 */
 void QCPLayerable::applyAntialiasingHint(QCPPainter *painter, bool localAntialiased,
                                          QCP::AntialiasedElement overrideElement) const
 {
     if (mParentPlot && mParentPlot->notAntialiasedElements().testFlag(overrideElement))
         painter->setAntialiasing(false);
     else if (mParentPlot && mParentPlot->antialiasedElements().testFlag(overrideElement))
         painter->setAntialiasing(true);
     else
         painter->setAntialiasing(localAntialiased);
 }
 
 /*! \internal
 
   This function is called by \ref initializeParentPlot, to allow subclasses to react on the setting
   of a parent plot. This is the case when 0 was passed as parent plot in the constructor, and the
   parent plot is set at a later time.
 
   For example, QCPLayoutElement/QCPLayout hierarchies may be created independently of any
   QCustomPlot at first. When they are then added to a layout inside the QCustomPlot, the top level
   element of the hierarchy gets its parent plot initialized with \ref initializeParentPlot. To
   propagate the parent plot to all the children of the hierarchy, the top level element then uses
   this function to pass the parent plot on to its child elements.
 
   The default implementation does nothing.
 
   \see initializeParentPlot
 */
 void QCPLayerable::parentPlotInitialized(QCustomPlot *parentPlot){ Q_UNUSED(parentPlot) }
 
 /*! \internal
 
   Returns the selection category this layerable shall belong to. The selection category is used in
   conjunction with \ref QCustomPlot::setInteractions to control which objects are selectable and
   which aren't.
 
   Subclasses that don't fit any of the normal \ref QCP::Interaction values can use \ref
   QCP::iSelectOther. This is what the default implementation returns.
 
   \see QCustomPlot::setInteractions
 */
 QCP::Interaction QCPLayerable::selectionCategory() const
 {
     return QCP::iSelectOther;
 }
 
 /*! \internal
 
   Returns the clipping rectangle of this layerable object. By default, this is the viewport of the
   parent QCustomPlot. Specific subclasses may reimplement this function to provide different
   clipping rects.
 
   The returned clipping rect is set on the painter before the draw function of the respective
   object is called.
 */
 QRect QCPLayerable::clipRect() const
 {
     if (mParentPlot)
         return mParentPlot->viewport();
     else
         return QRect();
 }
 
 /*! \internal
 
   This event is called when the layerable shall be selected, as a consequence of a click by the
   user. Subclasses should react to it by setting their selection state appropriately. The default
   implementation does nothing.
 
   \a event is the mouse event that caused the selection. \a additive indicates, whether the user
   was holding the multi-select-modifier while performing the selection (see \ref
   QCustomPlot::setMultiSelectModifier). if \a additive is true, the selection state must be toggled
   (i.e. become selected when unselected and unselected when selected).
 
   Every selectEvent is preceded by a call to \ref selectTest, which has returned positively (i.e.
   returned a value greater than 0 and less than the selection tolerance of the parent QCustomPlot).
   The \a details data you output from \ref selectTest is fed back via \a details here. You may
   use it to transport any kind of information from the selectTest to the possibly subsequent
   selectEvent. Usually \a details is used to transfer which part was clicked, if it is a layerable
   that has multiple individually selectable parts (like QCPAxis). This way selectEvent doesn't need
   to do the calculation again to find out which part was actually clicked.
 
   \a selectionStateChanged is an output parameter. If the pointer is non-null, this function must
   set the value either to true or false, depending on whether the selection state of this layerable
   was actually changed. For layerables that only are selectable as a whole and not in parts, this
   is simple: if \a additive is true, \a selectionStateChanged must also be set to true, because the
   selection toggles. If \a additive is false, \a selectionStateChanged is only set to true, if the
   layerable was previously unselected and now is switched to the selected state.
 
   \see selectTest, deselectEvent
 */
 void QCPLayerable::selectEvent(QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged)
 {
     Q_UNUSED(event)
     Q_UNUSED(additive)
     Q_UNUSED(details)
     Q_UNUSED(selectionStateChanged)
 }
 
 /*! \internal
 
   This event is called when the layerable shall be deselected, either as consequence of a user
   interaction or a call to \ref QCustomPlot::deselectAll. Subclasses should react to it by
   unsetting their selection appropriately.
 
   just as in \ref selectEvent, the output parameter \a selectionStateChanged (if non-null), must
   return true or false when the selection state of this layerable has changed or not changed,
   respectively.
 
   \see selectTest, selectEvent
 */
 void QCPLayerable::deselectEvent(bool *selectionStateChanged)
 {
     Q_UNUSED(selectionStateChanged)
 }
 
 /*!
   This event gets called when the user presses a mouse button while the cursor is over the
   layerable. Whether a cursor is over the layerable is decided by a preceding call to \ref
   selectTest.
 
   The current pixel position of the cursor on the QCustomPlot widget is accessible via \c
   event->pos(). The parameter \a details contains layerable-specific details about the hit, which
   were generated in the previous call to \ref selectTest. For example, One-dimensional plottables
   like \ref QCPGraph or \ref QCPBars convey the clicked data point in the \a details parameter, as
   \ref QCPDataSelection packed as QVariant. Multi-part objects convey the specific \c
   SelectablePart that was hit (e.g. \ref QCPAxis::SelectablePart in the case of axes).
 
   QCustomPlot uses an event propagation system that works the same as Qt's system. If your
   layerable doesn't reimplement the \ref mousePressEvent or explicitly calls \c event->ignore() in
   its reimplementation, the event will be propagated to the next layerable in the stacking order.
 
   Once a layerable has accepted the \ref mousePressEvent, it is considered the mouse grabber and
   will receive all following calls to \ref mouseMoveEvent or \ref mouseReleaseEvent for this mouse
   interaction (a "mouse interaction" in this context ends with the release).
 
   The default implementation does nothing except explicitly ignoring the event with \c
   event->ignore().
 
   \see mouseMoveEvent, mouseReleaseEvent, mouseDoubleClickEvent, wheelEvent
 */
 void QCPLayerable::mousePressEvent(QMouseEvent *event, const QVariant &details)
 {
     Q_UNUSED(details)
     event->ignore();
 }
 
 /*!
   This event gets called when the user moves the mouse while holding a mouse button, after this
   layerable has become the mouse grabber by accepting the preceding \ref mousePressEvent.
 
   The current pixel position of the cursor on the QCustomPlot widget is accessible via \c
   event->pos(). The parameter \a startPos indicates the position where the initial \ref
   mousePressEvent occurred, that started the mouse interaction.
 
   The default implementation does nothing.
 
   \see mousePressEvent, mouseReleaseEvent, mouseDoubleClickEvent, wheelEvent
 */
 void QCPLayerable::mouseMoveEvent(QMouseEvent *event, const QPointF &startPos)
 {
     Q_UNUSED(startPos)
     event->ignore();
 }
 
 /*!
   This event gets called when the user releases the mouse button, after this layerable has become
   the mouse grabber by accepting the preceding \ref mousePressEvent.
 
   The current pixel position of the cursor on the QCustomPlot widget is accessible via \c
   event->pos(). The parameter \a startPos indicates the position where the initial \ref
   mousePressEvent occurred, that started the mouse interaction.
 
   The default implementation does nothing.
 
   \see mousePressEvent, mouseMoveEvent, mouseDoubleClickEvent, wheelEvent
 */
 void QCPLayerable::mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos)
 {
     Q_UNUSED(startPos)
     event->ignore();
 }
 
 /*!
   This event gets called when the user presses the mouse button a second time in a double-click,
   while the cursor is over the layerable. Whether a cursor is over the layerable is decided by a
   preceding call to \ref selectTest.
 
   The \ref mouseDoubleClickEvent is called instead of the second \ref mousePressEvent. So in the
   case of a double-click, the event succession is
   <i>pressEvent &ndash; releaseEvent &ndash; doubleClickEvent &ndash; releaseEvent</i>.
 
   The current pixel position of the cursor on the QCustomPlot widget is accessible via \c
   event->pos(). The parameter \a details contains layerable-specific details about the hit, which
   were generated in the previous call to \ref selectTest. For example, One-dimensional plottables
   like \ref QCPGraph or \ref QCPBars convey the clicked data point in the \a details parameter, as
   \ref QCPDataSelection packed as QVariant. Multi-part objects convey the specific \c
   SelectablePart that was hit (e.g. \ref QCPAxis::SelectablePart in the case of axes).
 
   Similarly to \ref mousePressEvent, once a layerable has accepted the \ref mouseDoubleClickEvent,
   it is considered the mouse grabber and will receive all following calls to \ref mouseMoveEvent
   and \ref mouseReleaseEvent for this mouse interaction (a "mouse interaction" in this context ends
   with the release).
 
   The default implementation does nothing except explicitly ignoring the event with \c
   event->ignore().
 
   \see mousePressEvent, mouseMoveEvent, mouseReleaseEvent, wheelEvent
 */
 void QCPLayerable::mouseDoubleClickEvent(QMouseEvent *event, const QVariant &details)
 {
     Q_UNUSED(details)
     event->ignore();
 }
 
 /*!
   This event gets called when the user turns the mouse scroll wheel while the cursor is over the
   layerable. Whether a cursor is over the layerable is decided by a preceding call to \ref
   selectTest.
 
   The current pixel position of the cursor on the QCustomPlot widget is accessible via \c
   event->pos().
 
   The \c event->delta() indicates how far the mouse wheel was turned, which is usually +/- 120 for
   single rotation steps. However, if the mouse wheel is turned rapidly, multiple steps may
   accumulate to one event, making \c event->delta() larger. On the other hand, if the wheel has
   very smooth steps or none at all, the delta may be smaller.
 
   The default implementation does nothing.
 
   \see mousePressEvent, mouseMoveEvent, mouseReleaseEvent, mouseDoubleClickEvent
 */
 void QCPLayerable::wheelEvent(QWheelEvent *event)
 {
     event->ignore();
 }
 /* end of 'src/layer.cpp' */
 
 /* including file 'src/axis/range.cpp', size 12221                           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPRange
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPRange
   \brief Represents the range an axis is encompassing.
 
   contains a \a lower and \a upper double value and provides convenience input, output and
   modification functions.
 
   \see QCPAxis::setRange
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn double QCPRange::size() const
 
   Returns the size of the range, i.e. \a upper-\a lower
 */
 
 /*! \fn double QCPRange::center() const
 
   Returns the center of the range, i.e. (\a upper+\a lower)*0.5
 */
 
 /*! \fn void QCPRange::normalize()
 
   Makes sure \a lower is numerically smaller than \a upper. If this is not the case, the values are
   swapped.
 */
 
 /*! \fn bool QCPRange::contains(double value) const
 
   Returns true when \a value lies within or exactly on the borders of the range.
 */
 
 /*! \fn QCPRange &QCPRange::operator+=(const double& value)
 
   Adds \a value to both boundaries of the range.
 */
 
 /*! \fn QCPRange &QCPRange::operator-=(const double& value)
 
   Subtracts \a value from both boundaries of the range.
 */
 
 /*! \fn QCPRange &QCPRange::operator*=(const double& value)
 
   Multiplies both boundaries of the range by \a value.
 */
 
 /*! \fn QCPRange &QCPRange::operator/=(const double& value)
 
   Divides both boundaries of the range by \a value.
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Minimum range size (\a upper - \a lower) the range changing functions will accept. Smaller
   intervals would cause errors due to the 11-bit exponent of double precision numbers,
   corresponding to a minimum magnitude of roughly 1e-308.
 
   \warning Do not use this constant to indicate "arbitrarily small" values in plotting logic (as
   values that will appear in the plot)! It is intended only as a bound to compare against, e.g. to
   prevent axis ranges from obtaining underflowing ranges.
 
   \see validRange, maxRange
 */
 const double QCPRange::minRange = 1e-280;
 
 /*!
   Maximum values (negative and positive) the range will accept in range-changing functions.
   Larger absolute values would cause errors due to the 11-bit exponent of double precision numbers,
   corresponding to a maximum magnitude of roughly 1e308.
 
   \warning Do not use this constant to indicate "arbitrarily large" values in plotting logic (as
   values that will appear in the plot)! It is intended only as a bound to compare against, e.g. to
   prevent axis ranges from obtaining overflowing ranges.
 
   \see validRange, minRange
 */
 const double QCPRange::maxRange = 1e250;
 
 /*!
   Constructs a range with \a lower and \a upper set to zero.
 */
 QCPRange::QCPRange() : lower(0), upper(0)
 {
 }
 
 /*! \overload
 
   Constructs a range with the specified \a lower and \a upper values.
 
   The resulting range will be normalized (see \ref normalize), so if \a lower is not numerically
   smaller than \a upper, they will be swapped.
 */
 QCPRange::QCPRange(double lower, double upper) : lower(lower), upper(upper)
 {
     normalize();
 }
 
 /*! \overload
 
   Expands this range such that \a otherRange is contained in the new range. It is assumed that both
   this range and \a otherRange are normalized (see \ref normalize).
 
   If this range contains NaN as lower or upper bound, it will be replaced by the respective bound
   of \a otherRange.
 
   If \a otherRange is already inside the current range, this function does nothing.
 
   \see expanded
 */
 void QCPRange::expand(const QCPRange &otherRange)
 {
     if (lower > otherRange.lower || qIsNaN(lower))
         lower = otherRange.lower;
     if (upper < otherRange.upper || qIsNaN(upper))
         upper = otherRange.upper;
 }
 
 /*! \overload
 
   Expands this range such that \a includeCoord is contained in the new range. It is assumed that
   this range is normalized (see \ref normalize).
 
   If this range contains NaN as lower or upper bound, the respective bound will be set to \a
   includeCoord.
 
   If \a includeCoord is already inside the current range, this function does nothing.
 
   \see expand
 */
 void QCPRange::expand(double includeCoord)
 {
     if (lower > includeCoord || qIsNaN(lower))
         lower = includeCoord;
     if (upper < includeCoord || qIsNaN(upper))
         upper = includeCoord;
 }
 
 /*! \overload
 
   Returns an expanded range that contains this and \a otherRange. It is assumed that both this
   range and \a otherRange are normalized (see \ref normalize).
 
   If this range contains NaN as lower or upper bound, the returned range's bound will be taken from
   \a otherRange.
 
   \see expand
 */
 QCPRange QCPRange::expanded(const QCPRange &otherRange) const
 {
     QCPRange result = *this;
     result.expand(otherRange);
     return result;
 }
 
 /*! \overload
 
   Returns an expanded range that includes the specified \a includeCoord. It is assumed that this
   range is normalized (see \ref normalize).
 
   If this range contains NaN as lower or upper bound, the returned range's bound will be set to \a
   includeCoord.
 
   \see expand
 */
 QCPRange QCPRange::expanded(double includeCoord) const
 {
     QCPRange result = *this;
     result.expand(includeCoord);
     return result;
 }
 
 /*!
   Returns this range, possibly modified to not exceed the bounds provided as \a lowerBound and \a
   upperBound. If possible, the size of the current range is preserved in the process.
 
   If the range shall only be bounded at the lower side, you can set \a upperBound to \ref
   QCPRange::maxRange. If it shall only be bounded at the upper side, set \a lowerBound to -\ref
   QCPRange::maxRange.
 */
 QCPRange QCPRange::bounded(double lowerBound, double upperBound) const
 {
     if (lowerBound > upperBound)
         qSwap(lowerBound, upperBound);
 
     QCPRange result(lower, upper);
     if (result.lower < lowerBound)
     {
         result.lower = lowerBound;
         result.upper = lowerBound + size();
         if (result.upper > upperBound || qFuzzyCompare(size(), upperBound - lowerBound))
             result.upper = upperBound;
     }
     else if (result.upper > upperBound)
     {
         result.upper = upperBound;
         result.lower = upperBound - size();
         if (result.lower < lowerBound || qFuzzyCompare(size(), upperBound - lowerBound))
             result.lower = lowerBound;
     }
 
     return result;
 }
 
 /*!
   Returns a sanitized version of the range. Sanitized means for logarithmic scales, that
   the range won't span the positive and negative sign domain, i.e. contain zero. Further
   \a lower will always be numerically smaller (or equal) to \a upper.
 
   If the original range does span positive and negative sign domains or contains zero,
   the returned range will try to approximate the original range as good as possible.
   If the positive interval of the original range is wider than the negative interval, the
   returned range will only contain the positive interval, with lower bound set to \a rangeFac or
   \a rangeFac *\a upper, whichever is closer to zero. Same procedure is used if the negative interval
   is wider than the positive interval, this time by changing the \a upper bound.
 */
 QCPRange QCPRange::sanitizedForLogScale() const
 {
     double rangeFac = 1e-3;
     QCPRange sanitizedRange(lower, upper);
     sanitizedRange.normalize();
     // can't have range spanning negative and positive values in log plot, so change range to fix it
     //if (qFuzzyCompare(sanitizedRange.lower+1, 1) && !qFuzzyCompare(sanitizedRange.upper+1, 1))
     if (sanitizedRange.lower == 0.0 && sanitizedRange.upper != 0.0)
     {
         // case lower is 0
         if (rangeFac < sanitizedRange.upper * rangeFac)
             sanitizedRange.lower = rangeFac;
         else
             sanitizedRange.lower = sanitizedRange.upper * rangeFac;
     } //else if (!qFuzzyCompare(lower+1, 1) && qFuzzyCompare(upper+1, 1))
     else if (sanitizedRange.lower != 0.0 && sanitizedRange.upper == 0.0)
     {
         // case upper is 0
         if (-rangeFac > sanitizedRange.lower * rangeFac)
             sanitizedRange.upper = -rangeFac;
         else
             sanitizedRange.upper = sanitizedRange.lower * rangeFac;
     }
     else if (sanitizedRange.lower < 0 && sanitizedRange.upper > 0)
     {
         // find out whether negative or positive interval is wider to decide which sign domain will be chosen
         if (-sanitizedRange.lower > sanitizedRange.upper)
         {
             // negative is wider, do same as in case upper is 0
             if (-rangeFac > sanitizedRange.lower * rangeFac)
                 sanitizedRange.upper = -rangeFac;
             else
                 sanitizedRange.upper = sanitizedRange.lower * rangeFac;
         }
         else
         {
             // positive is wider, do same as in case lower is 0
             if (rangeFac < sanitizedRange.upper * rangeFac)
                 sanitizedRange.lower = rangeFac;
             else
                 sanitizedRange.lower = sanitizedRange.upper * rangeFac;
         }
     }
     // due to normalization, case lower>0 && upper<0 should never occur, because that implies upper<lower
     return sanitizedRange;
 }
 
 /*!
   Returns a sanitized version of the range. Sanitized means for linear scales, that
   \a lower will always be numerically smaller (or equal) to \a upper.
 */
 QCPRange QCPRange::sanitizedForLinScale() const
 {
     QCPRange sanitizedRange(lower, upper);
     sanitizedRange.normalize();
     return sanitizedRange;
 }
 
 /*!
   Checks, whether the specified range is within valid bounds, which are defined
   as QCPRange::maxRange and QCPRange::minRange.
   A valid range means:
   \li range bounds within -maxRange and maxRange
   \li range size above minRange
   \li range size below maxRange
 */
 bool QCPRange::validRange(double lower, double upper)
 {
     return (lower > -maxRange && upper < maxRange && qAbs(lower - upper) > minRange && qAbs(lower - upper) < maxRange &&
             !(lower > 0 && qIsInf(upper / lower)) && !(upper < 0 && qIsInf(lower / upper)));
 }
 
 /*!
   \overload
   Checks, whether the specified range is within valid bounds, which are defined
   as QCPRange::maxRange and QCPRange::minRange.
   A valid range means:
   \li range bounds within -maxRange and maxRange
   \li range size above minRange
   \li range size below maxRange
 */
 bool QCPRange::validRange(const QCPRange &range)
 {
     return (range.lower > -maxRange && range.upper < maxRange && qAbs(range.lower - range.upper) > minRange &&
             qAbs(range.lower - range.upper) < maxRange && !(range.lower > 0 && qIsInf(range.upper / range.lower)) &&
             !(range.upper < 0 && qIsInf(range.lower / range.upper)));
 }
 /* end of 'src/axis/range.cpp' */
 
 /* including file 'src/selection.cpp', size 21898                            */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPDataRange
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPDataRange
   \brief Describes a data range given by begin and end index
 
   QCPDataRange holds two integers describing the begin (\ref setBegin) and end (\ref setEnd) index
   of a contiguous set of data points. The end index points to the data point above the last data point that's part of
   the data range, similarly to the nomenclature used in standard iterators.
 
   Data Ranges are not bound to a certain plottable, thus they can be freely exchanged, created and
   modified. If a non-contiguous data set shall be described, the class \ref QCPDataSelection is
   used, which holds and manages multiple instances of \ref QCPDataRange. In most situations, \ref
   QCPDataSelection is thus used.
 
   Both \ref QCPDataRange and \ref QCPDataSelection offer convenience methods to work with them,
   e.g. \ref bounded, \ref expanded, \ref intersects, \ref intersection, \ref adjusted, \ref
   contains. Further, addition and subtraction operators (defined in \ref QCPDataSelection) can be
   used to join/subtract data ranges and data selections (or mixtures), to retrieve a corresponding
   \ref QCPDataSelection.
 
   %QCustomPlot's \ref dataselection "data selection mechanism" is based on \ref QCPDataSelection and
   QCPDataRange.
 
   \note Do not confuse \ref QCPDataRange with \ref QCPRange. A \ref QCPRange describes an interval
   in floating point plot coordinates, e.g. the current axis range.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn int QCPDataRange::size() const
 
   Returns the number of data points described by this data range. This is equal to the end index
   minus the begin index.
 
   \see length
 */
 
 /*! \fn int QCPDataRange::length() const
 
   Returns the number of data points described by this data range. Equivalent to \ref size.
 */
 
 /*! \fn void QCPDataRange::setBegin(int begin)
 
   Sets the begin of this data range. The \a begin index points to the first data point that is part
   of the data range.
 
   No checks or corrections are made to ensure the resulting range is valid (\ref isValid).
 
   \see setEnd
 */
 
 /*! \fn void QCPDataRange::setEnd(int end)
 
   Sets the end of this data range. The \a end index points to the data point just above the last
   data point that is part of the data range.
 
   No checks or corrections are made to ensure the resulting range is valid (\ref isValid).
 
   \see setBegin
 */
 
 /*! \fn bool QCPDataRange::isValid() const
 
   Returns whether this range is valid. A valid range has a begin index greater or equal to 0, and
   an end index greater or equal to the begin index.
 
   \note Invalid ranges should be avoided and are never the result of any of QCustomPlot's methods
   (unless they are themselves fed with invalid ranges). Do not pass invalid ranges to QCustomPlot's
   methods. The invalid range is not inherently prevented in QCPDataRange, to allow temporary
   invalid begin/end values while manipulating the range. An invalid range is not necessarily empty
   (\ref isEmpty), since its \ref length can be negative and thus non-zero.
 */
 
 /*! \fn bool QCPDataRange::isEmpty() const
 
   Returns whether this range is empty, i.e. whether its begin index equals its end index.
 
   \see size, length
 */
 
 /*! \fn QCPDataRange QCPDataRange::adjusted(int changeBegin, int changeEnd) const
 
   Returns a data range where \a changeBegin and \a changeEnd were added to the begin and end
   indices, respectively.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates an empty QCPDataRange, with begin and end set to 0.
 */
 QCPDataRange::QCPDataRange() : mBegin(0), mEnd(0)
 {
 }
 
 /*!
   Creates a QCPDataRange, initialized with the specified \a begin and \a end.
 
   No checks or corrections are made to ensure the resulting range is valid (\ref isValid).
 */
 QCPDataRange::QCPDataRange(int begin, int end) : mBegin(begin), mEnd(end)
 {
 }
 
 /*!
   Returns a data range that matches this data range, except that parts exceeding \a other are
   excluded.
 
   This method is very similar to \ref intersection, with one distinction: If this range and the \a
   other range share no intersection, the returned data range will be empty with begin and end set
   to the respective boundary side of \a other, at which this range is residing. (\ref intersection
   would just return a range with begin and end set to 0.)
 */
 QCPDataRange QCPDataRange::bounded(const QCPDataRange &other) const
 {
     QCPDataRange result(intersection(other));
     if (result
             .isEmpty()) // no intersection, preserve respective bounding side of otherRange as both begin and end of return value
     {
         if (mEnd <= other.mBegin)
             result = QCPDataRange(other.mBegin, other.mBegin);
         else
             result = QCPDataRange(other.mEnd, other.mEnd);
     }
     return result;
 }
 
 /*!
   Returns a data range that contains both this data range as well as \a other.
 */
 QCPDataRange QCPDataRange::expanded(const QCPDataRange &other) const
 {
     return QCPDataRange(qMin(mBegin, other.mBegin), qMax(mEnd, other.mEnd));
 }
 
 /*!
   Returns the data range which is contained in both this data range and \a other.
 
   This method is very similar to \ref bounded, with one distinction: If this range and the \a other
   range share no intersection, the returned data range will be empty with begin and end set to 0.
   (\ref bounded would return a range with begin and end set to one of the boundaries of \a other,
   depending on which side this range is on.)
 
   \see QCPDataSelection::intersection
 */
 QCPDataRange QCPDataRange::intersection(const QCPDataRange &other) const
 {
     QCPDataRange result(qMax(mBegin, other.mBegin), qMin(mEnd, other.mEnd));
     if (result.isValid())
         return result;
     else
         return QCPDataRange();
 }
 
 /*!
   Returns whether this data range and \a other share common data points.
 
   \see intersection, contains
 */
 bool QCPDataRange::intersects(const QCPDataRange &other) const
 {
     return !((mBegin > other.mBegin && mBegin >= other.mEnd) || (mEnd <= other.mBegin && mEnd < other.mEnd));
 }
 
 /*!
   Returns whether all data points described by this data range are also in \a other.
 
   \see intersects
 */
 bool QCPDataRange::contains(const QCPDataRange &other) const
 {
     return mBegin <= other.mBegin && mEnd >= other.mEnd;
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPDataSelection
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPDataSelection
   \brief Describes a data set by holding multiple QCPDataRange instances
 
   QCPDataSelection manages multiple instances of QCPDataRange in order to represent any (possibly
   disjoint) set of data selection.
 
   The data selection can be modified with addition and subtraction operators which take
   QCPDataSelection and QCPDataRange instances, as well as methods such as \ref addDataRange and
   \ref clear. Read access is provided by \ref dataRange, \ref dataRanges, \ref dataRangeCount, etc.
 
   The method \ref simplify is used to join directly adjacent or even overlapping QCPDataRange
   instances. QCPDataSelection automatically simplifies when using the addition/subtraction
   operators. The only case when \ref simplify is left to the user, is when calling \ref
   addDataRange, with the parameter \a simplify explicitly set to false. This is useful if many data
   ranges will be added to the selection successively and the overhead for simplifying after each
   iteration shall be avoided. In this case, you should make sure to call \ref simplify after
   completing the operation.
 
   Use \ref enforceType to bring the data selection into a state complying with the constraints for
   selections defined in \ref QCP::SelectionType.
 
   %QCustomPlot's \ref dataselection "data selection mechanism" is based on QCPDataSelection and
   QCPDataRange.
 
   \section qcpdataselection-iterating Iterating over a data selection
 
   As an example, the following code snippet calculates the average value of a graph's data
   \ref QCPAbstractPlottable::selection "selection":
 
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpdataselection-iterating-1
 
 */
 
 /* start documentation of inline functions */
 
 /*! \fn int QCPDataSelection::dataRangeCount() const
 
   Returns the number of ranges that make up the data selection. The ranges can be accessed by \ref
   dataRange via their index.
 
   \see dataRange, dataPointCount
 */
 
 /*! \fn QList<QCPDataRange> QCPDataSelection::dataRanges() const
 
   Returns all data ranges that make up the data selection. If the data selection is simplified (the
   usual state of the selection, see \ref simplify), the ranges are sorted by ascending data point
   index.
 
   \see dataRange
 */
 
 /*! \fn bool QCPDataSelection::isEmpty() const
 
   Returns true if there are no data ranges, and thus no data points, in this QCPDataSelection
   instance.
 
   \see dataRangeCount
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates an empty QCPDataSelection.
 */
 QCPDataSelection::QCPDataSelection()
 {
 }
 
 /*!
   Creates a QCPDataSelection containing the provided \a range.
 */
 QCPDataSelection::QCPDataSelection(const QCPDataRange &range)
 {
     mDataRanges.append(range);
 }
 
 /*!
   Returns true if this selection is identical (contains the same data ranges with the same begin
   and end indices) to \a other.
 
   Note that both data selections must be in simplified state (the usual state of the selection, see
   \ref simplify) for this operator to return correct results.
 */
 bool QCPDataSelection::operator==(const QCPDataSelection &other) const
 {
     if (mDataRanges.size() != other.mDataRanges.size())
         return false;
     for (int i = 0; i < mDataRanges.size(); ++i)
     {
         if (mDataRanges.at(i) != other.mDataRanges.at(i))
             return false;
     }
     return true;
 }
 
 /*!
   Adds the data selection of \a other to this data selection, and then simplifies this data
   selection (see \ref simplify).
 */
 QCPDataSelection &QCPDataSelection::operator+=(const QCPDataSelection &other)
 {
     mDataRanges << other.mDataRanges;
     simplify();
     return *this;
 }
 
 /*!
   Adds the data range \a other to this data selection, and then simplifies this data selection (see
   \ref simplify).
 */
 QCPDataSelection &QCPDataSelection::operator+=(const QCPDataRange &other)
 {
     addDataRange(other);
     return *this;
 }
 
 /*!
   Removes all data point indices that are described by \a other from this data range.
 */
 QCPDataSelection &QCPDataSelection::operator-=(const QCPDataSelection &other)
 {
     for (int i = 0; i < other.dataRangeCount(); ++i)
         *this -= other.dataRange(i);
 
     return *this;
 }
 
 /*!
   Removes all data point indices that are described by \a other from this data range.
 */
 QCPDataSelection &QCPDataSelection::operator-=(const QCPDataRange &other)
 {
     if (other.isEmpty() || isEmpty())
         return *this;
 
     simplify();
     int i = 0;
     while (i < mDataRanges.size())
     {
         const int thisBegin = mDataRanges.at(i).begin();
         const int thisEnd   = mDataRanges.at(i).end();
         if (thisBegin >= other.end())
             break; // since data ranges are sorted after the simplify() call, no ranges which contain other will come after this
 
         if (thisEnd > other.begin()) // ranges which don't fulfill this are entirely before other and can be ignored
         {
             if (thisBegin >= other.begin()) // range leading segment is encompassed
             {
                 if (thisEnd <= other.end()) // range fully encompassed, remove completely
                 {
                     mDataRanges.removeAt(i);
                     continue;
                 }
                 else // only leading segment is encompassed, trim accordingly
                     mDataRanges[i].setBegin(other.end());
             }
             else // leading segment is not encompassed
             {
                 if (thisEnd <= other.end()) // only trailing segment is encompassed, trim accordingly
                 {
                     mDataRanges[i].setEnd(other.begin());
                 }
                 else // other lies inside this range, so split range
                 {
                     mDataRanges[i].setEnd(other.begin());
                     mDataRanges.insert(i + 1, QCPDataRange(other.end(), thisEnd));
                     break; // since data ranges are sorted (and don't overlap) after simplify() call, we're done here
                 }
             }
         }
         ++i;
     }
 
     return *this;
 }
 
 /*!
   Returns the total number of data points contained in all data ranges that make up this data
   selection.
 */
 int QCPDataSelection::dataPointCount() const
 {
     int result = 0;
     for (int i = 0; i < mDataRanges.size(); ++i)
         result += mDataRanges.at(i).length();
     return result;
 }
 
 /*!
   Returns the data range with the specified \a index.
 
   If the data selection is simplified (the usual state of the selection, see \ref simplify), the
   ranges are sorted by ascending data point index.
 
   \see dataRangeCount
 */
 QCPDataRange QCPDataSelection::dataRange(int index) const
 {
     if (index >= 0 && index < mDataRanges.size())
     {
         return mDataRanges.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of range:" << index;
         return QCPDataRange();
     }
 }
 
 /*!
   Returns a \ref QCPDataRange which spans the entire data selection, including possible
   intermediate segments which are not part of the original data selection.
 */
 QCPDataRange QCPDataSelection::span() const
 {
     if (isEmpty())
         return QCPDataRange();
     else
         return QCPDataRange(mDataRanges.first().begin(), mDataRanges.last().end());
 }
 
 /*!
   Adds the given \a dataRange to this data selection. This is equivalent to the += operator but
   allows disabling immediate simplification by setting \a simplify to false. This can improve
   performance if adding a very large amount of data ranges successively. In this case, make sure to
   call \ref simplify manually, after the operation.
 */
 void QCPDataSelection::addDataRange(const QCPDataRange &dataRange, bool simplify)
 {
     mDataRanges.append(dataRange);
     if (simplify)
         this->simplify();
 }
 
 /*!
   Removes all data ranges. The data selection then contains no data points.
 
   \ref isEmpty
 */
 void QCPDataSelection::clear()
 {
     mDataRanges.clear();
 }
 
 /*!
   Sorts all data ranges by range begin index in ascending order, and then joins directly adjacent
   or overlapping ranges. This can reduce the number of individual data ranges in the selection, and
   prevents possible double-counting when iterating over the data points held by the data ranges.
 
   This method is automatically called when using the addition/subtraction operators. The only case
   when \ref simplify is left to the user, is when calling \ref addDataRange, with the parameter \a
   simplify explicitly set to false.
 */
 void QCPDataSelection::simplify()
 {
     // remove any empty ranges:
     for (int i = mDataRanges.size() - 1; i >= 0; --i)
     {
         if (mDataRanges.at(i).isEmpty())
             mDataRanges.removeAt(i);
     }
     if (mDataRanges.isEmpty())
         return;
 
     // sort ranges by starting value, ascending:
     std::sort(mDataRanges.begin(), mDataRanges.end(), lessThanDataRangeBegin);
 
     // join overlapping/contiguous ranges:
     int i = 1;
     while (i < mDataRanges.size())
     {
         if (mDataRanges.at(i - 1).end() >=
             mDataRanges.at(i)
                 .begin()) // range i overlaps/joins with i-1, so expand range i-1 appropriately and remove range i from list
         {
             mDataRanges[i - 1].setEnd(qMax(mDataRanges.at(i - 1).end(), mDataRanges.at(i).end()));
             mDataRanges.removeAt(i);
         }
         else
             ++i;
     }
 }
 
 /*!
   Makes sure this data selection conforms to the specified \a type selection type. Before the type
   is enforced, \ref simplify is called.
 
   Depending on \a type, enforcing means adding new data points that were previously not part of the
   selection, or removing data points from the selection. If the current selection already conforms
   to \a type, the data selection is not changed.
 
   \see QCP::SelectionType
 */
 void QCPDataSelection::enforceType(QCP::SelectionType type)
 {
     simplify();
     switch (type)
     {
         case QCP::stNone:
         {
             mDataRanges.clear();
             break;
         }
         case QCP::stWhole:
         {
             // whole selection isn't defined by data range, so don't change anything (is handled in plottable methods)
             break;
         }
         case QCP::stSingleData:
         {
             // reduce all data ranges to the single first data point:
             if (!mDataRanges.isEmpty())
             {
                 if (mDataRanges.size() > 1)
                     mDataRanges = QList<QCPDataRange>() << mDataRanges.first();
                 if (mDataRanges.first().length() > 1)
                     mDataRanges.first().setEnd(mDataRanges.first().begin() + 1);
             }
             break;
         }
         case QCP::stDataRange:
         {
             mDataRanges = QList<QCPDataRange>() << span();
             break;
         }
         case QCP::stMultipleDataRanges:
         {
             // this is the selection type that allows all concievable combinations of ranges, so do nothing
             break;
         }
     }
 }
 
 /*!
   Returns true if the data selection \a other is contained entirely in this data selection, i.e.
   all data point indices that are in \a other are also in this data selection.
 
   \see QCPDataRange::contains
 */
 bool QCPDataSelection::contains(const QCPDataSelection &other) const
 {
     if (other.isEmpty())
         return false;
 
     int otherIndex = 0;
     int thisIndex  = 0;
     while (thisIndex < mDataRanges.size() && otherIndex < other.mDataRanges.size())
     {
         if (mDataRanges.at(thisIndex).contains(other.mDataRanges.at(otherIndex)))
             ++otherIndex;
         else
             ++thisIndex;
     }
     return thisIndex <
            mDataRanges
                .size(); // if thisIndex ran all the way to the end to find a containing range for the current otherIndex, other is not contained in this
 }
 
 /*!
   Returns a data selection containing the points which are both in this data selection and in the
   data range \a other.
 
   A common use case is to limit an unknown data selection to the valid range of a data container,
   using \ref QCPDataContainer::dataRange as \a other. One can then safely iterate over the returned
   data selection without exceeding the data container's bounds.
 */
 QCPDataSelection QCPDataSelection::intersection(const QCPDataRange &other) const
 {
     QCPDataSelection result;
     for (int i = 0; i < mDataRanges.size(); ++i)
         result.addDataRange(mDataRanges.at(i).intersection(other), false);
     result.simplify();
     return result;
 }
 
 /*!
   Returns a data selection containing the points which are both in this data selection and in the
   data selection \a other.
 */
 QCPDataSelection QCPDataSelection::intersection(const QCPDataSelection &other) const
 {
     QCPDataSelection result;
     for (int i = 0; i < other.dataRangeCount(); ++i)
         result += intersection(other.dataRange(i));
     result.simplify();
     return result;
 }
 
 /*!
   Returns a data selection which is the exact inverse of this data selection, with \a outerRange
   defining the base range on which to invert. If \a outerRange is smaller than the \ref span of
   this data selection, it is expanded accordingly.
 
   For example, this method can be used to retrieve all unselected segments by setting \a outerRange
   to the full data range of the plottable, and calling this method on a data selection holding the
   selected segments.
 */
 QCPDataSelection QCPDataSelection::inverse(const QCPDataRange &outerRange) const
 {
     if (isEmpty())
         return QCPDataSelection(outerRange);
     QCPDataRange fullRange = outerRange.expanded(span());
 
     QCPDataSelection result;
     // first unselected segment:
     if (mDataRanges.first().begin() != fullRange.begin())
         result.addDataRange(QCPDataRange(fullRange.begin(), mDataRanges.first().begin()), false);
     // intermediate unselected segments:
     for (int i = 1; i < mDataRanges.size(); ++i)
         result.addDataRange(QCPDataRange(mDataRanges.at(i - 1).end(), mDataRanges.at(i).begin()), false);
     // last unselected segment:
     if (mDataRanges.last().end() != fullRange.end())
         result.addDataRange(QCPDataRange(mDataRanges.last().end(), fullRange.end()), false);
     result.simplify();
     return result;
 }
 /* end of 'src/selection.cpp' */
 
 /* including file 'src/selectionrect.cpp', size 9224                         */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPSelectionRect
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPSelectionRect
   \brief Provides rect/rubber-band data selection and range zoom interaction
 
   QCPSelectionRect is used by QCustomPlot when the \ref QCustomPlot::setSelectionRectMode is not
   \ref QCP::srmNone. When the user drags the mouse across the plot, the current selection rect
   instance (\ref QCustomPlot::setSelectionRect) is forwarded these events and makes sure an
   according rect shape is drawn. At the begin, during, and after completion of the interaction, it
   emits the corresponding signals \ref started, \ref changed, \ref canceled, and \ref accepted.
 
   The QCustomPlot instance connects own slots to the current selection rect instance, in order to
   react to an accepted selection rect interaction accordingly.
 
   \ref isActive can be used to check whether the selection rect is currently active. An ongoing
   selection interaction can be cancelled programmatically via calling \ref cancel at any time.
 
   The appearance of the selection rect can be controlled via \ref setPen and \ref setBrush.
 
   If you wish to provide custom behaviour, e.g. a different visual representation of the selection
   rect (\ref QCPSelectionRect::draw), you can subclass QCPSelectionRect and pass an instance of
   your subclass to \ref QCustomPlot::setSelectionRect.
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn bool QCPSelectionRect::isActive() const
 
   Returns true if there is currently a selection going on, i.e. the user has started dragging a
   selection rect, but hasn't released the mouse button yet.
 
   \see cancel
 */
 
 /* end of documentation of inline functions */
 /* start documentation of signals */
 
 /*! \fn void QCPSelectionRect::started(QMouseEvent *event);
 
   This signal is emitted when a selection rect interaction was initiated, i.e. the user just
   started dragging the selection rect with the mouse.
 */
 
 /*! \fn void QCPSelectionRect::changed(const QRect &rect, QMouseEvent *event);
 
   This signal is emitted while the selection rect interaction is ongoing and the \a rect has
   changed its size due to the user moving the mouse.
 
   Note that \a rect may have a negative width or height, if the selection is being dragged to the
   upper or left side of the selection rect origin.
 */
 
 /*! \fn void QCPSelectionRect::canceled(const QRect &rect, QInputEvent *event);
 
   This signal is emitted when the selection interaction was cancelled. Note that \a event is 0 if
   the selection interaction was cancelled programmatically, by a call to \ref cancel.
 
   The user may cancel the selection interaction by pressing the escape key. In this case, \a event
   holds the respective input event.
 
   Note that \a rect may have a negative width or height, if the selection is being dragged to the
   upper or left side of the selection rect origin.
 */
 
 /*! \fn void QCPSelectionRect::accepted(const QRect &rect, QMouseEvent *event);
 
   This signal is emitted when the selection interaction was completed by the user releasing the
   mouse button.
 
   Note that \a rect may have a negative width or height, if the selection is being dragged to the
   upper or left side of the selection rect origin.
 */
 
 /* end documentation of signals */
 
 /*!
   Creates a new QCPSelectionRect instance. To make QCustomPlot use the selection rect instance,
   pass it to \ref QCustomPlot::setSelectionRect. \a parentPlot should be set to the same
   QCustomPlot widget.
 */
 QCPSelectionRect::QCPSelectionRect(QCustomPlot *parentPlot)
     : QCPLayerable(parentPlot), mPen(QBrush(Qt::gray), 0, Qt::DashLine), mBrush(Qt::NoBrush), mActive(false)
 {
 }
 
 QCPSelectionRect::~QCPSelectionRect()
 {
     cancel();
 }
 
 /*!
   A convenience function which returns the coordinate range of the provided \a axis, that this
   selection rect currently encompasses.
 */
 QCPRange QCPSelectionRect::range(const QCPAxis *axis) const
 {
     if (axis)
     {
         if (axis->orientation() == Qt::Horizontal)
             return QCPRange(axis->pixelToCoord(mRect.left()), axis->pixelToCoord(mRect.left() + mRect.width()));
         else
             return QCPRange(axis->pixelToCoord(mRect.top() + mRect.height()), axis->pixelToCoord(mRect.top()));
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "called with axis zero";
         return QCPRange();
     }
 }
 
 /*!
   Sets the pen that will be used to draw the selection rect outline.
 
   \see setBrush
 */
 void QCPSelectionRect::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the brush that will be used to fill the selection rect. By default the selection rect is not
   filled, i.e. \a brush is <tt>Qt::NoBrush</tt>.
 
   \see setPen
 */
 void QCPSelectionRect::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   If there is currently a selection interaction going on (\ref isActive), the interaction is
   canceled. The selection rect will emit the \ref canceled signal.
 */
 void QCPSelectionRect::cancel()
 {
     if (mActive)
     {
         mActive = false;
-        emit canceled(mRect, 0);
+        emit canceled(mRect, nullptr);
     }
 }
 
 /*! \internal
 
   This method is called by QCustomPlot to indicate that a selection rect interaction was initiated.
   The default implementation sets the selection rect to active, initializes the selection rect
   geometry and emits the \ref started signal.
 */
 void QCPSelectionRect::startSelection(QMouseEvent *event)
 {
     mActive = true;
     mRect   = QRect(event->pos(), event->pos());
     emit started(event);
 }
 
 /*! \internal
 
   This method is called by QCustomPlot to indicate that an ongoing selection rect interaction needs
   to update its geometry. The default implementation updates the rect and emits the \ref changed
   signal.
 */
 void QCPSelectionRect::moveSelection(QMouseEvent *event)
 {
     mRect.setBottomRight(event->pos());
     emit changed(mRect, event);
     layer()->replot();
 }
 
 /*! \internal
 
   This method is called by QCustomPlot to indicate that an ongoing selection rect interaction has
   finished by the user releasing the mouse button. The default implementation deactivates the
   selection rect and emits the \ref accepted signal.
 */
 void QCPSelectionRect::endSelection(QMouseEvent *event)
 {
     mRect.setBottomRight(event->pos());
     mActive = false;
     emit accepted(mRect, event);
 }
 
 /*! \internal
 
   This method is called by QCustomPlot when a key has been pressed by the user while the selection
   rect interaction is active. The default implementation allows to \ref cancel the interaction by
   hitting the escape key.
 */
 void QCPSelectionRect::keyPressEvent(QKeyEvent *event)
 {
     if (event->key() == Qt::Key_Escape && mActive)
     {
         mActive = false;
         emit canceled(mRect, event);
     }
 }
 
 /* inherits documentation from base class */
 void QCPSelectionRect::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aeOther);
 }
 
 /*! \internal
 
   If the selection rect is active (\ref isActive), draws the selection rect defined by \a mRect.
 
   \seebaseclassmethod
 */
 void QCPSelectionRect::draw(QCPPainter *painter)
 {
     if (mActive)
     {
         painter->setPen(mPen);
         painter->setBrush(mBrush);
         painter->drawRect(mRect);
     }
 }
 /* end of 'src/selectionrect.cpp' */
 
 /* including file 'src/layout.cpp', size 74302                               */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPMarginGroup
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPMarginGroup
   \brief A margin group allows synchronization of margin sides if working with multiple layout elements.
 
   QCPMarginGroup allows you to tie a margin side of two or more layout elements together, such that
   they will all have the same size, based on the largest required margin in the group.
 
   \n
   \image html QCPMarginGroup.png "Demonstration of QCPMarginGroup"
   \n
 
   In certain situations it is desirable that margins at specific sides are synchronized across
   layout elements. For example, if one QCPAxisRect is below another one in a grid layout, it will
   provide a cleaner look to the user if the left and right margins of the two axis rects are of the
   same size. The left axis of the top axis rect will then be at the same horizontal position as the
   left axis of the lower axis rect, making them appear aligned. The same applies for the right
   axes. This is what QCPMarginGroup makes possible.
 
   To add/remove a specific side of a layout element to/from a margin group, use the \ref
   QCPLayoutElement::setMarginGroup method. To completely break apart the margin group, either call
   \ref clear, or just delete the margin group.
 
   \section QCPMarginGroup-example Example
 
   First create a margin group:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpmargingroup-creation-1
   Then set this group on the layout element sides:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpmargingroup-creation-2
   Here, we've used the first two axis rects of the plot and synchronized their left margins with
   each other and their right margins with each other.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QList<QCPLayoutElement*> QCPMarginGroup::elements(QCP::MarginSide side) const
 
   Returns a list of all layout elements that have their margin \a side associated with this margin
   group.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a new QCPMarginGroup instance in \a parentPlot.
 */
 QCPMarginGroup::QCPMarginGroup(QCustomPlot *parentPlot) : QObject(parentPlot), mParentPlot(parentPlot)
 {
     mChildren.insert(QCP::msLeft, QList<QCPLayoutElement *>());
     mChildren.insert(QCP::msRight, QList<QCPLayoutElement *>());
     mChildren.insert(QCP::msTop, QList<QCPLayoutElement *>());
     mChildren.insert(QCP::msBottom, QList<QCPLayoutElement *>());
 }
 
 QCPMarginGroup::~QCPMarginGroup()
 {
     clear();
 }
 
 /*!
   Returns whether this margin group is empty. If this function returns true, no layout elements use
   this margin group to synchronize margin sides.
 */
 bool QCPMarginGroup::isEmpty() const
 {
     QHashIterator<QCP::MarginSide, QList<QCPLayoutElement *>> it(mChildren);
     while (it.hasNext())
     {
         it.next();
         if (!it.value().isEmpty())
             return false;
     }
     return true;
 }
 
 /*!
   Clears this margin group. The synchronization of the margin sides that use this margin group is
   lifted and they will use their individual margin sizes again.
 */
 void QCPMarginGroup::clear()
 {
     // make all children remove themselves from this margin group:
     QHashIterator<QCP::MarginSide, QList<QCPLayoutElement *>> it(mChildren);
     while (it.hasNext())
     {
         it.next();
         const QList<QCPLayoutElement *> elements = it.value();
         for (int i = elements.size() - 1; i >= 0; --i)
-            elements.at(i)->setMarginGroup(it.key(), 0); // removes itself from mChildren via removeChild
+            elements.at(i)->setMarginGroup(it.key(), nullptr); // removes itself from mChildren via removeChild
     }
 }
 
 /*! \internal
 
   Returns the synchronized common margin for \a side. This is the margin value that will be used by
   the layout element on the respective side, if it is part of this margin group.
 
   The common margin is calculated by requesting the automatic margin (\ref
   QCPLayoutElement::calculateAutoMargin) of each element associated with \a side in this margin
   group, and choosing the largest returned value. (QCPLayoutElement::minimumMargins is taken into
   account, too.)
 */
 int QCPMarginGroup::commonMargin(QCP::MarginSide side) const
 {
     // query all automatic margins of the layout elements in this margin group side and find maximum:
     int result                               = 0;
     const QList<QCPLayoutElement *> elements = mChildren.value(side);
     for (int i = 0; i < elements.size(); ++i)
     {
         if (!elements.at(i)->autoMargins().testFlag(side))
             continue;
         int m = qMax(elements.at(i)->calculateAutoMargin(side),
                      QCP::getMarginValue(elements.at(i)->minimumMargins(), side));
         if (m > result)
             result = m;
     }
     return result;
 }
 
 /*! \internal
 
   Adds \a element to the internal list of child elements, for the margin \a side.
 
   This function does not modify the margin group property of \a element.
 */
 void QCPMarginGroup::addChild(QCP::MarginSide side, QCPLayoutElement *element)
 {
     if (!mChildren[side].contains(element))
         mChildren[side].append(element);
     else
         qDebug() << Q_FUNC_INFO << "element is already child of this margin group side"
                  << reinterpret_cast<quintptr>(element);
 }
 
 /*! \internal
 
   Removes \a element from the internal list of child elements, for the margin \a side.
 
   This function does not modify the margin group property of \a element.
 */
 void QCPMarginGroup::removeChild(QCP::MarginSide side, QCPLayoutElement *element)
 {
     if (!mChildren[side].removeOne(element))
         qDebug() << Q_FUNC_INFO << "element is not child of this margin group side"
                  << reinterpret_cast<quintptr>(element);
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLayoutElement
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPLayoutElement
   \brief The abstract base class for all objects that form \ref thelayoutsystem "the layout system".
 
   This is an abstract base class. As such, it can't be instantiated directly, rather use one of its subclasses.
 
   A Layout element is a rectangular object which can be placed in layouts. It has an outer rect
   (QCPLayoutElement::outerRect) and an inner rect (\ref QCPLayoutElement::rect). The difference
   between outer and inner rect is called its margin. The margin can either be set to automatic or
   manual (\ref setAutoMargins) on a per-side basis. If a side is set to manual, that margin can be
   set explicitly with \ref setMargins and will stay fixed at that value. If it's set to automatic,
   the layout element subclass will control the value itself (via \ref calculateAutoMargin).
 
   Layout elements can be placed in layouts (base class QCPLayout) like QCPLayoutGrid. The top level
   layout is reachable via \ref QCustomPlot::plotLayout, and is a \ref QCPLayoutGrid. Since \ref
   QCPLayout itself derives from \ref QCPLayoutElement, layouts can be nested.
 
   Thus in QCustomPlot one can divide layout elements into two categories: The ones that are
   invisible by themselves, because they don't draw anything. Their only purpose is to manage the
   position and size of other layout elements. This category of layout elements usually use
   QCPLayout as base class. Then there is the category of layout elements which actually draw
   something. For example, QCPAxisRect, QCPLegend and QCPTextElement are of this category. This does
   not necessarily mean that the latter category can't have child layout elements. QCPLegend for
   instance, actually derives from QCPLayoutGrid and the individual legend items are child layout
   elements in the grid layout.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QCPLayout *QCPLayoutElement::layout() const
 
   Returns the parent layout of this layout element.
 */
 
 /*! \fn QRect QCPLayoutElement::rect() const
 
   Returns the inner rect of this layout element. The inner rect is the outer rect (\ref
   setOuterRect) shrinked by the margins (\ref setMargins, \ref setAutoMargins).
 
   In some cases, the area between outer and inner rect is left blank. In other cases the margin
   area is used to display peripheral graphics while the main content is in the inner rect. This is
   where automatic margin calculation becomes interesting because it allows the layout element to
   adapt the margins to the peripheral graphics it wants to draw. For example, \ref QCPAxisRect
   draws the axis labels and tick labels in the margin area, thus needs to adjust the margins (if
   \ref setAutoMargins is enabled) according to the space required by the labels of the axes.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates an instance of QCPLayoutElement and sets default values.
 */
 QCPLayoutElement::QCPLayoutElement(QCustomPlot *parentPlot)
     : QCPLayerable(
           parentPlot), // parenthood is changed as soon as layout element gets inserted into a layout (except for top level layout)
-      mParentLayout(0), mMinimumSize(), mMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX), mRect(0, 0, 0, 0),
+      mParentLayout(nullptr), mMinimumSize(), mMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX), mRect(0, 0, 0, 0),
       mOuterRect(0, 0, 0, 0), mMargins(0, 0, 0, 0), mMinimumMargins(0, 0, 0, 0), mAutoMargins(QCP::msAll)
 {
 }
 
 QCPLayoutElement::~QCPLayoutElement()
 {
-    setMarginGroup(QCP::msAll, 0); // unregister at margin groups, if there are any
+    setMarginGroup(QCP::msAll, nullptr); // unregister at margin groups, if there are any
     // unregister at layout:
     if (qobject_cast<QCPLayout *>(
             mParentLayout)) // the qobject_cast is just a safeguard in case the layout forgets to call clear() in its dtor and this dtor is called by QObject dtor
         mParentLayout->take(this);
 }
 
 /*!
   Sets the outer rect of this layout element. If the layout element is inside a layout, the layout
   sets the position and size of this layout element using this function.
 
   Calling this function externally has no effect, since the layout will overwrite any changes to
   the outer rect upon the next replot.
 
   The layout element will adapt its inner \ref rect by applying the margins inward to the outer rect.
 
   \see rect
 */
 void QCPLayoutElement::setOuterRect(const QRect &rect)
 {
     if (mOuterRect != rect)
     {
         mOuterRect = rect;
         mRect      = mOuterRect.adjusted(mMargins.left(), mMargins.top(), -mMargins.right(), -mMargins.bottom());
     }
 }
 
 /*!
   Sets the margins of this layout element. If \ref setAutoMargins is disabled for some or all
   sides, this function is used to manually set the margin on those sides. Sides that are still set
   to be handled automatically are ignored and may have any value in \a margins.
 
   The margin is the distance between the outer rect (controlled by the parent layout via \ref
   setOuterRect) and the inner \ref rect (which usually contains the main content of this layout
   element).
 
   \see setAutoMargins
 */
 void QCPLayoutElement::setMargins(const QMargins &margins)
 {
     if (mMargins != margins)
     {
         mMargins = margins;
         mRect    = mOuterRect.adjusted(mMargins.left(), mMargins.top(), -mMargins.right(), -mMargins.bottom());
     }
 }
 
 /*!
   If \ref setAutoMargins is enabled on some or all margins, this function is used to provide
   minimum values for those margins.
 
   The minimum values are not enforced on margin sides that were set to be under manual control via
   \ref setAutoMargins.
 
   \see setAutoMargins
 */
 void QCPLayoutElement::setMinimumMargins(const QMargins &margins)
 {
     if (mMinimumMargins != margins)
     {
         mMinimumMargins = margins;
     }
 }
 
 /*!
   Sets on which sides the margin shall be calculated automatically. If a side is calculated
   automatically, a minimum margin value may be provided with \ref setMinimumMargins. If a side is
   set to be controlled manually, the value may be specified with \ref setMargins.
 
   Margin sides that are under automatic control may participate in a \ref QCPMarginGroup (see \ref
   setMarginGroup), to synchronize (align) it with other layout elements in the plot.
 
   \see setMinimumMargins, setMargins, QCP::MarginSide
 */
 void QCPLayoutElement::setAutoMargins(QCP::MarginSides sides)
 {
     mAutoMargins = sides;
 }
 
 /*!
   Sets the minimum size for the inner \ref rect of this layout element. A parent layout tries to
   respect the \a size here by changing row/column sizes in the layout accordingly.
 
   If the parent layout size is not sufficient to satisfy all minimum size constraints of its child
   layout elements, the layout may set a size that is actually smaller than \a size. QCustomPlot
   propagates the layout's size constraints to the outside by setting its own minimum QWidget size
   accordingly, so violations of \a size should be exceptions.
 */
 void QCPLayoutElement::setMinimumSize(const QSize &size)
 {
     if (mMinimumSize != size)
     {
         mMinimumSize = size;
         if (mParentLayout)
             mParentLayout->sizeConstraintsChanged();
     }
 }
 
 /*! \overload
 
   Sets the minimum size for the inner \ref rect of this layout element.
 */
 void QCPLayoutElement::setMinimumSize(int width, int height)
 {
     setMinimumSize(QSize(width, height));
 }
 
 /*!
   Sets the maximum size for the inner \ref rect of this layout element. A parent layout tries to
   respect the \a size here by changing row/column sizes in the layout accordingly.
 */
 void QCPLayoutElement::setMaximumSize(const QSize &size)
 {
     if (mMaximumSize != size)
     {
         mMaximumSize = size;
         if (mParentLayout)
             mParentLayout->sizeConstraintsChanged();
     }
 }
 
 /*! \overload
 
   Sets the maximum size for the inner \ref rect of this layout element.
 */
 void QCPLayoutElement::setMaximumSize(int width, int height)
 {
     setMaximumSize(QSize(width, height));
 }
 
 /*!
   Sets the margin \a group of the specified margin \a sides.
 
   Margin groups allow synchronizing specified margins across layout elements, see the documentation
   of \ref QCPMarginGroup.
 
   To unset the margin group of \a sides, set \a group to 0.
 
   Note that margin groups only work for margin sides that are set to automatic (\ref
   setAutoMargins).
 
   \see QCP::MarginSide
 */
 void QCPLayoutElement::setMarginGroup(QCP::MarginSides sides, QCPMarginGroup *group)
 {
     QVector<QCP::MarginSide> sideVector;
     if (sides.testFlag(QCP::msLeft))
         sideVector.append(QCP::msLeft);
     if (sides.testFlag(QCP::msRight))
         sideVector.append(QCP::msRight);
     if (sides.testFlag(QCP::msTop))
         sideVector.append(QCP::msTop);
     if (sides.testFlag(QCP::msBottom))
         sideVector.append(QCP::msBottom);
 
     for (int i = 0; i < sideVector.size(); ++i)
     {
         QCP::MarginSide side = sideVector.at(i);
         if (marginGroup(side) != group)
         {
             QCPMarginGroup *oldGroup = marginGroup(side);
             if (oldGroup) // unregister at old group
                 oldGroup->removeChild(side, this);
 
             if (!group) // if setting to 0, remove hash entry. Else set hash entry to new group and register there
             {
                 mMarginGroups.remove(side);
             }
             else // setting to a new group
             {
                 mMarginGroups[side] = group;
                 group->addChild(side, this);
             }
         }
     }
 }
 
 /*!
   Updates the layout element and sub-elements. This function is automatically called before every
   replot by the parent layout element. It is called multiple times, once for every \ref
   UpdatePhase. The phases are run through in the order of the enum values. For details about what
   happens at the different phases, see the documentation of \ref UpdatePhase.
 
   Layout elements that have child elements should call the \ref update method of their child
   elements, and pass the current \a phase unchanged.
 
   The default implementation executes the automatic margin mechanism in the \ref upMargins phase.
   Subclasses should make sure to call the base class implementation.
 */
 void QCPLayoutElement::update(UpdatePhase phase)
 {
     if (phase == upMargins)
     {
         if (mAutoMargins != QCP::msNone)
         {
             // set the margins of this layout element according to automatic margin calculation, either directly or via a margin group:
             QMargins newMargins                   = mMargins;
             QList<QCP::MarginSide> allMarginSides = QList<QCP::MarginSide>()
                                                     << QCP::msLeft << QCP::msRight << QCP::msTop << QCP::msBottom;
             foreach (QCP::MarginSide side, allMarginSides)
             {
                 if (mAutoMargins.testFlag(side)) // this side's margin shall be calculated automatically
                 {
                     if (mMarginGroups.contains(side))
                         QCP::setMarginValue(
                             newMargins, side,
                             mMarginGroups[side]->commonMargin(
                                 side)); // this side is part of a margin group, so get the margin value from that group
                     else
                         QCP::setMarginValue(
                             newMargins, side,
                             calculateAutoMargin(
                                 side)); // this side is not part of a group, so calculate the value directly
                     // apply minimum margin restrictions:
                     if (QCP::getMarginValue(newMargins, side) < QCP::getMarginValue(mMinimumMargins, side))
                         QCP::setMarginValue(newMargins, side, QCP::getMarginValue(mMinimumMargins, side));
                 }
             }
             setMargins(newMargins);
         }
     }
 }
 
 /*!
   Returns the minimum size this layout element (the inner \ref rect) may be compressed to.
 
   if a minimum size (\ref setMinimumSize) was not set manually, parent layouts consult this
   function to determine the minimum allowed size of this layout element. (A manual minimum size is
   considered set if it is non-zero.)
 */
 QSize QCPLayoutElement::minimumSizeHint() const
 {
     return mMinimumSize;
 }
 
 /*!
   Returns the maximum size this layout element (the inner \ref rect) may be expanded to.
 
   if a maximum size (\ref setMaximumSize) was not set manually, parent layouts consult this
   function to determine the maximum allowed size of this layout element. (A manual maximum size is
   considered set if it is smaller than Qt's QWIDGETSIZE_MAX.)
 */
 QSize QCPLayoutElement::maximumSizeHint() const
 {
     return mMaximumSize;
 }
 
 /*!
   Returns a list of all child elements in this layout element. If \a recursive is true, all
   sub-child elements are included in the list, too.
 
   \warning There may be entries with value 0 in the returned list. (For example, QCPLayoutGrid may have
   empty cells which yield 0 at the respective index.)
 */
 QList<QCPLayoutElement *> QCPLayoutElement::elements(bool recursive) const
 {
     Q_UNUSED(recursive)
     return QList<QCPLayoutElement *>();
 }
 
 /*!
   Layout elements are sensitive to events inside their outer rect. If \a pos is within the outer
   rect, this method returns a value corresponding to 0.99 times the parent plot's selection
   tolerance. However, layout elements are not selectable by default. So if \a onlySelectable is
   true, -1.0 is returned.
 
   See \ref QCPLayerable::selectTest for a general explanation of this virtual method.
 
   QCPLayoutElement subclasses may reimplement this method to provide more specific selection test
   behaviour.
 */
 double QCPLayoutElement::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
 
     if (onlySelectable)
         return -1;
 
     if (QRectF(mOuterRect).contains(pos))
     {
         if (mParentPlot)
             return mParentPlot->selectionTolerance() * 0.99;
         else
         {
             qDebug() << Q_FUNC_INFO << "parent plot not defined";
             return -1;
         }
     }
     else
         return -1;
 }
 
 /*! \internal
 
   propagates the parent plot initialization to all child elements, by calling \ref
   QCPLayerable::initializeParentPlot on them.
 */
 void QCPLayoutElement::parentPlotInitialized(QCustomPlot *parentPlot)
 {
     foreach (QCPLayoutElement *el, elements(false))
     {
         if (!el->parentPlot())
             el->initializeParentPlot(parentPlot);
     }
 }
 
 /*! \internal
 
   Returns the margin size for this \a side. It is used if automatic margins is enabled for this \a
   side (see \ref setAutoMargins). If a minimum margin was set with \ref setMinimumMargins, the
   returned value will not be smaller than the specified minimum margin.
 
   The default implementation just returns the respective manual margin (\ref setMargins) or the
   minimum margin, whichever is larger.
 */
 int QCPLayoutElement::calculateAutoMargin(QCP::MarginSide side)
 {
     return qMax(QCP::getMarginValue(mMargins, side), QCP::getMarginValue(mMinimumMargins, side));
 }
 
 /*! \internal
 
   This virtual method is called when this layout element was moved to a different QCPLayout, or
   when this layout element has changed its logical position (e.g. row and/or column) within the
   same QCPLayout. Subclasses may use this to react accordingly.
 
   Since this method is called after the completion of the move, you can access the new parent
   layout via \ref layout().
 
   The default implementation does nothing.
 */
 void QCPLayoutElement::layoutChanged()
 {
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLayout
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPLayout
   \brief The abstract base class for layouts
 
   This is an abstract base class for layout elements whose main purpose is to define the position
   and size of other child layout elements. In most cases, layouts don't draw anything themselves
   (but there are exceptions to this, e.g. QCPLegend).
 
   QCPLayout derives from QCPLayoutElement, and thus can itself be nested in other layouts.
 
   QCPLayout introduces a common interface for accessing and manipulating the child elements. Those
   functions are most notably \ref elementCount, \ref elementAt, \ref takeAt, \ref take, \ref
   simplify, \ref removeAt, \ref remove and \ref clear. Individual subclasses may add more functions
   to this interface which are more specialized to the form of the layout. For example, \ref
   QCPLayoutGrid adds functions that take row and column indices to access cells of the layout grid
   more conveniently.
 
   Since this is an abstract base class, you can't instantiate it directly. Rather use one of its
   subclasses like QCPLayoutGrid or QCPLayoutInset.
 
   For a general introduction to the layout system, see the dedicated documentation page \ref
   thelayoutsystem "The Layout System".
 */
 
 /* start documentation of pure virtual functions */
 
 /*! \fn virtual int QCPLayout::elementCount() const = 0
 
   Returns the number of elements/cells in the layout.
 
   \see elements, elementAt
 */
 
 /*! \fn virtual QCPLayoutElement* QCPLayout::elementAt(int index) const = 0
 
   Returns the element in the cell with the given \a index. If \a index is invalid, returns 0.
 
   Note that even if \a index is valid, the respective cell may be empty in some layouts (e.g.
   QCPLayoutGrid), so this function may return 0 in those cases. You may use this function to check
   whether a cell is empty or not.
 
   \see elements, elementCount, takeAt
 */
 
 /*! \fn virtual QCPLayoutElement* QCPLayout::takeAt(int index) = 0
 
   Removes the element with the given \a index from the layout and returns it.
 
   If the \a index is invalid or the cell with that index is empty, returns 0.
 
   Note that some layouts don't remove the respective cell right away but leave an empty cell after
   successful removal of the layout element. To collapse empty cells, use \ref simplify.
 
   \see elementAt, take
 */
 
 /*! \fn virtual bool QCPLayout::take(QCPLayoutElement* element) = 0
 
   Removes the specified \a element from the layout and returns true on success.
 
   If the \a element isn't in this layout, returns false.
 
   Note that some layouts don't remove the respective cell right away but leave an empty cell after
   successful removal of the layout element. To collapse empty cells, use \ref simplify.
 
   \see takeAt
 */
 
 /* end documentation of pure virtual functions */
 
 /*!
   Creates an instance of QCPLayout and sets default values. Note that since QCPLayout
   is an abstract base class, it can't be instantiated directly.
 */
 QCPLayout::QCPLayout()
 {
 }
 
 /*!
   First calls the QCPLayoutElement::update base class implementation to update the margins on this
   layout.
 
   Then calls \ref updateLayout which subclasses reimplement to reposition and resize their cells.
 
   Finally, \ref update is called on all child elements.
 */
 void QCPLayout::update(UpdatePhase phase)
 {
     QCPLayoutElement::update(phase);
 
     // set child element rects according to layout:
     if (phase == upLayout)
         updateLayout();
 
     // propagate update call to child elements:
     const int elCount = elementCount();
     for (int i = 0; i < elCount; ++i)
     {
         if (QCPLayoutElement *el = elementAt(i))
             el->update(phase);
     }
 }
 
 /* inherits documentation from base class */
 QList<QCPLayoutElement *> QCPLayout::elements(bool recursive) const
 {
     const int c = elementCount();
     QList<QCPLayoutElement *> result;
 #if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
     result.reserve(c);
 #endif
     for (int i = 0; i < c; ++i)
         result.append(elementAt(i));
     if (recursive)
     {
         for (int i = 0; i < c; ++i)
         {
             if (result.at(i))
                 result << result.at(i)->elements(recursive);
         }
     }
     return result;
 }
 
 /*!
   Simplifies the layout by collapsing empty cells. The exact behavior depends on subclasses, the
   default implementation does nothing.
 
   Not all layouts need simplification. For example, QCPLayoutInset doesn't use explicit
   simplification while QCPLayoutGrid does.
 */
 void QCPLayout::simplify()
 {
 }
 
 /*!
   Removes and deletes the element at the provided \a index. Returns true on success. If \a index is
   invalid or points to an empty cell, returns false.
 
   This function internally uses \ref takeAt to remove the element from the layout and then deletes
   the returned element. Note that some layouts don't remove the respective cell right away but leave an
   empty cell after successful removal of the layout element. To collapse empty cells, use \ref
   simplify.
 
   \see remove, takeAt
 */
 bool QCPLayout::removeAt(int index)
 {
     if (QCPLayoutElement *el = takeAt(index))
     {
         delete el;
         return true;
     }
     else
         return false;
 }
 
 /*!
   Removes and deletes the provided \a element. Returns true on success. If \a element is not in the
   layout, returns false.
 
   This function internally uses \ref takeAt to remove the element from the layout and then deletes
   the element. Note that some layouts don't remove the respective cell right away but leave an
   empty cell after successful removal of the layout element. To collapse empty cells, use \ref
   simplify.
 
   \see removeAt, take
 */
 bool QCPLayout::remove(QCPLayoutElement *element)
 {
     if (take(element))
     {
         delete element;
         return true;
     }
     else
         return false;
 }
 
 /*!
   Removes and deletes all layout elements in this layout. Finally calls \ref simplify to make sure
   all empty cells are collapsed.
 
   \see remove, removeAt
 */
 void QCPLayout::clear()
 {
     for (int i = elementCount() - 1; i >= 0; --i)
     {
         if (elementAt(i))
             removeAt(i);
     }
     simplify();
 }
 
 /*!
   Subclasses call this method to report changed (minimum/maximum) size constraints.
 
   If the parent of this layout is again a QCPLayout, forwards the call to the parent's \ref
   sizeConstraintsChanged. If the parent is a QWidget (i.e. is the \ref QCustomPlot::plotLayout of
   QCustomPlot), calls QWidget::updateGeometry, so if the QCustomPlot widget is inside a Qt QLayout,
   it may update itself and resize cells accordingly.
 */
 void QCPLayout::sizeConstraintsChanged() const
 {
     if (QWidget *w = qobject_cast<QWidget *>(parent()))
         w->updateGeometry();
     else if (QCPLayout *l = qobject_cast<QCPLayout *>(parent()))
         l->sizeConstraintsChanged();
 }
 
 /*! \internal
 
   Subclasses reimplement this method to update the position and sizes of the child elements/cells
   via calling their \ref QCPLayoutElement::setOuterRect. The default implementation does nothing.
 
   The geometry used as a reference is the inner \ref rect of this layout. Child elements should stay
   within that rect.
 
   \ref getSectionSizes may help with the reimplementation of this function.
 
   \see update
 */
 void QCPLayout::updateLayout()
 {
 }
 
 /*! \internal
 
   Associates \a el with this layout. This is done by setting the \ref QCPLayoutElement::layout, the
   \ref QCPLayerable::parentLayerable and the QObject parent to this layout.
 
   Further, if \a el didn't previously have a parent plot, calls \ref
   QCPLayerable::initializeParentPlot on \a el to set the paret plot.
 
   This method is used by subclass specific methods that add elements to the layout. Note that this
   method only changes properties in \a el. The removal from the old layout and the insertion into
   the new layout must be done additionally.
 */
 void QCPLayout::adoptElement(QCPLayoutElement *el)
 {
     if (el)
     {
         el->mParentLayout = this;
         el->setParentLayerable(this);
         el->setParent(this);
         if (!el->parentPlot())
             el->initializeParentPlot(mParentPlot);
         el->layoutChanged();
     }
     else
         qDebug() << Q_FUNC_INFO << "Null element passed";
 }
 
 /*! \internal
 
   Disassociates \a el from this layout. This is done by setting the \ref QCPLayoutElement::layout
   and the \ref QCPLayerable::parentLayerable to zero. The QObject parent is set to the parent
   QCustomPlot.
 
   This method is used by subclass specific methods that remove elements from the layout (e.g. \ref
   take or \ref takeAt). Note that this method only changes properties in \a el. The removal from
   the old layout must be done additionally.
 */
 void QCPLayout::releaseElement(QCPLayoutElement *el)
 {
     if (el)
     {
-        el->mParentLayout = 0;
-        el->setParentLayerable(0);
+        el->mParentLayout = nullptr;
+        el->setParentLayerable(nullptr);
         el->setParent(mParentPlot);
         // Note: Don't initializeParentPlot(0) here, because layout element will stay in same parent plot
     }
     else
         qDebug() << Q_FUNC_INFO << "Null element passed";
 }
 
 /*! \internal
 
   This is a helper function for the implementation of \ref updateLayout in subclasses.
 
   It calculates the sizes of one-dimensional sections with provided constraints on maximum section
   sizes, minimum section sizes, relative stretch factors and the final total size of all sections.
 
   The QVector entries refer to the sections. Thus all QVectors must have the same size.
 
   \a maxSizes gives the maximum allowed size of each section. If there shall be no maximum size
   imposed, set all vector values to Qt's QWIDGETSIZE_MAX.
 
   \a minSizes gives the minimum allowed size of each section. If there shall be no minimum size
   imposed, set all vector values to zero. If the \a minSizes entries add up to a value greater than
   \a totalSize, sections will be scaled smaller than the proposed minimum sizes. (In other words,
   not exceeding the allowed total size is taken to be more important than not going below minimum
   section sizes.)
 
   \a stretchFactors give the relative proportions of the sections to each other. If all sections
   shall be scaled equally, set all values equal. If the first section shall be double the size of
   each individual other section, set the first number of \a stretchFactors to double the value of
   the other individual values (e.g. {2, 1, 1, 1}).
 
   \a totalSize is the value that the final section sizes will add up to. Due to rounding, the
   actual sum may differ slightly. If you want the section sizes to sum up to exactly that value,
   you could distribute the remaining difference on the sections.
 
   The return value is a QVector containing the section sizes.
 */
 QVector<int> QCPLayout::getSectionSizes(QVector<int> maxSizes, QVector<int> minSizes, QVector<double> stretchFactors,
                                         int totalSize) const
 {
     if (maxSizes.size() != minSizes.size() || minSizes.size() != stretchFactors.size())
     {
         qDebug() << Q_FUNC_INFO << "Passed vector sizes aren't equal:" << maxSizes << minSizes << stretchFactors;
         return QVector<int>();
     }
     if (stretchFactors.isEmpty())
         return QVector<int>();
     int sectionCount = stretchFactors.size();
     QVector<double> sectionSizes(sectionCount);
     // if provided total size is forced smaller than total minimum size, ignore minimum sizes (squeeze sections):
     int minSizeSum = 0;
     for (int i = 0; i < sectionCount; ++i)
         minSizeSum += minSizes.at(i);
     if (totalSize < minSizeSum)
     {
         // new stretch factors are minimum sizes and minimum sizes are set to zero:
         for (int i = 0; i < sectionCount; ++i)
         {
             stretchFactors[i] = minSizes.at(i);
             minSizes[i]       = 0;
         }
     }
 
     QList<int> minimumLockedSections;
     QList<int> unfinishedSections;
     for (int i = 0; i < sectionCount; ++i)
         unfinishedSections.append(i);
     double freeSize = totalSize;
 
     int outerIterations = 0;
     while (!unfinishedSections.isEmpty() &&
            outerIterations <
                sectionCount * 2) // the iteration check ist just a failsafe in case something really strange happens
     {
         ++outerIterations;
         int innerIterations = 0;
         while (!unfinishedSections.isEmpty() &&
                innerIterations <
                    sectionCount * 2) // the iteration check ist just a failsafe in case something really strange happens
         {
             ++innerIterations;
             // find section that hits its maximum next:
             int nextId     = -1;
             double nextMax = 1e12;
             for (int i = 0; i < unfinishedSections.size(); ++i)
             {
                 int secId        = unfinishedSections.at(i);
                 double hitsMaxAt = (maxSizes.at(secId) - sectionSizes.at(secId)) / stretchFactors.at(secId);
                 if (hitsMaxAt < nextMax)
                 {
                     nextMax = hitsMaxAt;
                     nextId  = secId;
                 }
             }
             // check if that maximum is actually within the bounds of the total size (i.e. can we stretch all remaining sections so far that the found section
             // actually hits its maximum, without exceeding the total size when we add up all sections)
             double stretchFactorSum = 0;
             for (int i = 0; i < unfinishedSections.size(); ++i)
                 stretchFactorSum += stretchFactors.at(unfinishedSections.at(i));
             double nextMaxLimit = freeSize / stretchFactorSum;
             if (nextMax <
                 nextMaxLimit) // next maximum is actually hit, move forward to that point and fix the size of that section
             {
                 for (int i = 0; i < unfinishedSections.size(); ++i)
                 {
                     sectionSizes[unfinishedSections.at(i)] +=
                         nextMax * stretchFactors.at(unfinishedSections.at(i)); // increment all sections
                     freeSize -= nextMax * stretchFactors.at(unfinishedSections.at(i));
                 }
                 unfinishedSections.removeOne(nextId); // exclude the section that is now at maximum from further changes
             }
             else // next maximum isn't hit, just distribute rest of free space on remaining sections
             {
                 for (int i = 0; i < unfinishedSections.size(); ++i)
                     sectionSizes[unfinishedSections.at(i)] +=
                         nextMaxLimit * stretchFactors.at(unfinishedSections.at(i)); // increment all sections
                 unfinishedSections.clear();
             }
         }
         if (innerIterations == sectionCount * 2)
             qDebug() << Q_FUNC_INFO
                      << "Exceeded maximum expected inner iteration count, layouting aborted. Input was:" << maxSizes
                      << minSizes << stretchFactors << totalSize;
 
         // now check whether the resulting section sizes violate minimum restrictions:
         bool foundMinimumViolation = false;
         for (int i = 0; i < sectionSizes.size(); ++i)
         {
             if (minimumLockedSections.contains(i))
                 continue;
             if (sectionSizes.at(i) < minSizes.at(i)) // section violates minimum
             {
                 sectionSizes[i]       = minSizes.at(i); // set it to minimum
                 foundMinimumViolation = true;           // make sure we repeat the whole optimization process
                 minimumLockedSections.append(i);
             }
         }
         if (foundMinimumViolation)
         {
             freeSize = totalSize;
             for (int i = 0; i < sectionCount; ++i)
             {
                 if (!minimumLockedSections.contains(
                         i)) // only put sections that haven't hit their minimum back into the pool
                     unfinishedSections.append(i);
                 else
                     freeSize -=
                         sectionSizes.at(i); // remove size of minimum locked sections from available space in next round
             }
             // reset all section sizes to zero that are in unfinished sections (all others have been set to their minimum):
             for (int i = 0; i < unfinishedSections.size(); ++i)
                 sectionSizes[unfinishedSections.at(i)] = 0;
         }
     }
     if (outerIterations == sectionCount * 2)
         qDebug() << Q_FUNC_INFO
                  << "Exceeded maximum expected outer iteration count, layouting aborted. Input was:" << maxSizes
                  << minSizes << stretchFactors << totalSize;
 
     QVector<int> result(sectionCount);
     for (int i = 0; i < sectionCount; ++i)
         result[i] = qRound(sectionSizes.at(i));
     return result;
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLayoutGrid
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPLayoutGrid
   \brief A layout that arranges child elements in a grid
 
   Elements are laid out in a grid with configurable stretch factors (\ref setColumnStretchFactor,
   \ref setRowStretchFactor) and spacing (\ref setColumnSpacing, \ref setRowSpacing).
 
   Elements can be added to cells via \ref addElement. The grid is expanded if the specified row or
   column doesn't exist yet. Whether a cell contains a valid layout element can be checked with \ref
   hasElement, that element can be retrieved with \ref element. If rows and columns that only have
   empty cells shall be removed, call \ref simplify. Removal of elements is either done by just
   adding the element to a different layout or by using the QCPLayout interface \ref take or \ref
   remove.
 
   If you use \ref addElement(QCPLayoutElement*) without explicit parameters for \a row and \a
   column, the grid layout will choose the position according to the current \ref setFillOrder and
   the wrapping (\ref setWrap).
 
   Row and column insertion can be performed with \ref insertRow and \ref insertColumn.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn int QCPLayoutGrid::rowCount() const
 
   Returns the number of rows in the layout.
 
   \see columnCount
 */
 
 /*! \fn int QCPLayoutGrid::columnCount() const
 
   Returns the number of columns in the layout.
 
   \see rowCount
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates an instance of QCPLayoutGrid and sets default values.
 */
 QCPLayoutGrid::QCPLayoutGrid() : mColumnSpacing(5), mRowSpacing(5), mWrap(0), mFillOrder(foRowsFirst)
 {
 }
 
 QCPLayoutGrid::~QCPLayoutGrid()
 {
     // clear all child layout elements. This is important because only the specific layouts know how
     // to handle removing elements (clear calls virtual removeAt method to do that).
     clear();
 }
 
 /*!
   Returns the element in the cell in \a row and \a column.
 
   Returns 0 if either the row/column is invalid or if the cell is empty. In those cases, a qDebug
   message is printed. To check whether a cell exists and isn't empty, use \ref hasElement.
 
   \see addElement, hasElement
 */
 QCPLayoutElement *QCPLayoutGrid::element(int row, int column) const
 {
     if (row >= 0 && row < mElements.size())
     {
         if (column >= 0 && column < mElements.first().size())
         {
             if (QCPLayoutElement *result = mElements.at(row).at(column))
                 return result;
             else
                 qDebug() << Q_FUNC_INFO << "Requested cell is empty. Row:" << row << "Column:" << column;
         }
         else
             qDebug() << Q_FUNC_INFO << "Invalid column. Row:" << row << "Column:" << column;
     }
     else
         qDebug() << Q_FUNC_INFO << "Invalid row. Row:" << row << "Column:" << column;
-    return 0;
+    return nullptr;
 }
 
 /*! \overload
 
   Adds the \a element to cell with \a row and \a column. If \a element is already in a layout, it
   is first removed from there. If \a row or \a column don't exist yet, the layout is expanded
   accordingly.
 
   Returns true if the element was added successfully, i.e. if the cell at \a row and \a column
   didn't already have an element.
 
   Use the overload of this method without explicit row/column index to place the element according
   to the configured fill order and wrapping settings.
 
   \see element, hasElement, take, remove
 */
 bool QCPLayoutGrid::addElement(int row, int column, QCPLayoutElement *element)
 {
     if (!hasElement(row, column))
     {
         if (element && element->layout()) // remove from old layout first
             element->layout()->take(element);
         expandTo(row + 1, column + 1);
         mElements[row][column] = element;
         if (element)
             adoptElement(element);
         return true;
     }
     else
         qDebug() << Q_FUNC_INFO << "There is already an element in the specified row/column:" << row << column;
     return false;
 }
 
 /*! \overload
 
   Adds the \a element to the next empty cell according to the current fill order (\ref
   setFillOrder) and wrapping (\ref setWrap). If \a element is already in a layout, it is first
   removed from there. If necessary, the layout is expanded to hold the new element.
 
   Returns true if the element was added successfully.
 
   \see setFillOrder, setWrap, element, hasElement, take, remove
 */
 bool QCPLayoutGrid::addElement(QCPLayoutElement *element)
 {
     int rowIndex = 0;
     int colIndex = 0;
     if (mFillOrder == foColumnsFirst)
     {
         while (hasElement(rowIndex, colIndex))
         {
             ++colIndex;
             if (colIndex >= mWrap && mWrap > 0)
             {
                 colIndex = 0;
                 ++rowIndex;
             }
         }
     }
     else
     {
         while (hasElement(rowIndex, colIndex))
         {
             ++rowIndex;
             if (rowIndex >= mWrap && mWrap > 0)
             {
                 rowIndex = 0;
                 ++colIndex;
             }
         }
     }
     return addElement(rowIndex, colIndex, element);
 }
 
 /*!
   Returns whether the cell at \a row and \a column exists and contains a valid element, i.e. isn't
   empty.
 
   \see element
 */
 bool QCPLayoutGrid::hasElement(int row, int column)
 {
     if (row >= 0 && row < rowCount() && column >= 0 && column < columnCount())
         return mElements.at(row).at(column);
     else
         return false;
 }
 
 /*!
   Sets the stretch \a factor of \a column.
 
   Stretch factors control the relative sizes of rows and columns. Cells will not be resized beyond
   their minimum and maximum widths/heights (\ref QCPLayoutElement::setMinimumSize, \ref
   QCPLayoutElement::setMaximumSize), regardless of the stretch factor.
 
   The default stretch factor of newly created rows/columns is 1.
 
   \see setColumnStretchFactors, setRowStretchFactor
 */
 void QCPLayoutGrid::setColumnStretchFactor(int column, double factor)
 {
     if (column >= 0 && column < columnCount())
     {
         if (factor > 0)
             mColumnStretchFactors[column] = factor;
         else
             qDebug() << Q_FUNC_INFO << "Invalid stretch factor, must be positive:" << factor;
     }
     else
         qDebug() << Q_FUNC_INFO << "Invalid column:" << column;
 }
 
 /*!
   Sets the stretch \a factors of all columns. \a factors must have the size \ref columnCount.
 
   Stretch factors control the relative sizes of rows and columns. Cells will not be resized beyond
   their minimum and maximum widths/heights (\ref QCPLayoutElement::setMinimumSize, \ref
   QCPLayoutElement::setMaximumSize), regardless of the stretch factor.
 
   The default stretch factor of newly created rows/columns is 1.
 
   \see setColumnStretchFactor, setRowStretchFactors
 */
 void QCPLayoutGrid::setColumnStretchFactors(const QList<double> &factors)
 {
     if (factors.size() == mColumnStretchFactors.size())
     {
         mColumnStretchFactors = factors;
         for (int i = 0; i < mColumnStretchFactors.size(); ++i)
         {
             if (mColumnStretchFactors.at(i) <= 0)
             {
                 qDebug() << Q_FUNC_INFO << "Invalid stretch factor, must be positive:" << mColumnStretchFactors.at(i);
                 mColumnStretchFactors[i] = 1;
             }
         }
     }
     else
         qDebug() << Q_FUNC_INFO << "Column count not equal to passed stretch factor count:" << factors;
 }
 
 /*!
   Sets the stretch \a factor of \a row.
 
   Stretch factors control the relative sizes of rows and columns. Cells will not be resized beyond
   their minimum and maximum widths/heights (\ref QCPLayoutElement::setMinimumSize, \ref
   QCPLayoutElement::setMaximumSize), regardless of the stretch factor.
 
   The default stretch factor of newly created rows/columns is 1.
 
   \see setColumnStretchFactors, setRowStretchFactor
 */
 void QCPLayoutGrid::setRowStretchFactor(int row, double factor)
 {
     if (row >= 0 && row < rowCount())
     {
         if (factor > 0)
             mRowStretchFactors[row] = factor;
         else
             qDebug() << Q_FUNC_INFO << "Invalid stretch factor, must be positive:" << factor;
     }
     else
         qDebug() << Q_FUNC_INFO << "Invalid row:" << row;
 }
 
 /*!
   Sets the stretch \a factors of all rows. \a factors must have the size \ref rowCount.
 
   Stretch factors control the relative sizes of rows and columns. Cells will not be resized beyond
   their minimum and maximum widths/heights (\ref QCPLayoutElement::setMinimumSize, \ref
   QCPLayoutElement::setMaximumSize), regardless of the stretch factor.
 
   The default stretch factor of newly created rows/columns is 1.
 
   \see setRowStretchFactor, setColumnStretchFactors
 */
 void QCPLayoutGrid::setRowStretchFactors(const QList<double> &factors)
 {
     if (factors.size() == mRowStretchFactors.size())
     {
         mRowStretchFactors = factors;
         for (int i = 0; i < mRowStretchFactors.size(); ++i)
         {
             if (mRowStretchFactors.at(i) <= 0)
             {
                 qDebug() << Q_FUNC_INFO << "Invalid stretch factor, must be positive:" << mRowStretchFactors.at(i);
                 mRowStretchFactors[i] = 1;
             }
         }
     }
     else
         qDebug() << Q_FUNC_INFO << "Row count not equal to passed stretch factor count:" << factors;
 }
 
 /*!
   Sets the gap that is left blank between columns to \a pixels.
 
   \see setRowSpacing
 */
 void QCPLayoutGrid::setColumnSpacing(int pixels)
 {
     mColumnSpacing = pixels;
 }
 
 /*!
   Sets the gap that is left blank between rows to \a pixels.
 
   \see setColumnSpacing
 */
 void QCPLayoutGrid::setRowSpacing(int pixels)
 {
     mRowSpacing = pixels;
 }
 
 /*!
   Sets the maximum number of columns or rows that are used, before new elements added with \ref
   addElement(QCPLayoutElement*) will start to fill the next row or column, respectively. It depends
   on \ref setFillOrder, whether rows or columns are wrapped.
 
   If \a count is set to zero, no wrapping will ever occur.
 
   If you wish to re-wrap the elements currently in the layout, call \ref setFillOrder with \a
   rearrange set to true (the actual fill order doesn't need to be changed for the rearranging to be
   done).
 
   Note that the method \ref addElement(int row, int column, QCPLayoutElement *element) with
   explicitly stated row and column is not subject to wrapping and can place elements even beyond
   the specified wrapping point.
 
   \see setFillOrder
 */
 void QCPLayoutGrid::setWrap(int count)
 {
     mWrap = qMax(0, count);
 }
 
 /*!
   Sets the filling order and wrapping behaviour that is used when adding new elements with the
   method \ref addElement(QCPLayoutElement*).
 
   The specified \a order defines whether rows or columns are filled first. Using \ref setWrap, you
   can control at which row/column count wrapping into the next column/row will occur. If you set it
   to zero, no wrapping will ever occur. Changing the fill order also changes the meaning of the
   linear index used e.g. in \ref elementAt and \ref takeAt.
 
   If you want to have all current elements arranged in the new order, set \a rearrange to true. The
   elements will be rearranged in a way that tries to preserve their linear index. However, empty
   cells are skipped during build-up of the new cell order, which shifts the succeding element's
   index. The rearranging is performed even if the specified \a order is already the current fill
   order. Thus this method can be used to re-wrap the current elements.
 
   If \a rearrange is false, the current element arrangement is not changed, which means the
   linear indexes change (because the linear index is dependent on the fill order).
 
   Note that the method \ref addElement(int row, int column, QCPLayoutElement *element) with
   explicitly stated row and column is not subject to wrapping and can place elements even beyond
   the specified wrapping point.
 
   \see setWrap, addElement(QCPLayoutElement*)
 */
 void QCPLayoutGrid::setFillOrder(FillOrder order, bool rearrange)
 {
     // if rearranging, take all elements via linear index of old fill order:
     const int elCount = elementCount();
     QVector<QCPLayoutElement *> tempElements;
     if (rearrange)
     {
         tempElements.reserve(elCount);
         for (int i = 0; i < elCount; ++i)
         {
             if (elementAt(i))
                 tempElements.append(takeAt(i));
         }
         simplify();
     }
     // change fill order as requested:
     mFillOrder = order;
     // if rearranging, re-insert via linear index according to new fill order:
     if (rearrange)
     {
         for (int i = 0; i < tempElements.size(); ++i)
             addElement(tempElements.at(i));
     }
 }
 
 /*!
   Expands the layout to have \a newRowCount rows and \a newColumnCount columns. So the last valid
   row index will be \a newRowCount-1, the last valid column index will be \a newColumnCount-1.
 
   If the current column/row count is already larger or equal to \a newColumnCount/\a newRowCount,
   this function does nothing in that dimension.
 
   Newly created cells are empty, new rows and columns have the stretch factor 1.
 
   Note that upon a call to \ref addElement, the layout is expanded automatically to contain the
   specified row and column, using this function.
 
   \see simplify
 */
 void QCPLayoutGrid::expandTo(int newRowCount, int newColumnCount)
 {
     // add rows as necessary:
     while (rowCount() < newRowCount)
     {
         mElements.append(QList<QCPLayoutElement *>());
         mRowStretchFactors.append(1);
     }
     // go through rows and expand columns as necessary:
     int newColCount = qMax(columnCount(), newColumnCount);
     for (int i = 0; i < rowCount(); ++i)
     {
         while (mElements.at(i).size() < newColCount)
             mElements[i].append(0);
     }
     while (mColumnStretchFactors.size() < newColCount)
         mColumnStretchFactors.append(1);
 }
 
 /*!
   Inserts a new row with empty cells at the row index \a newIndex. Valid values for \a newIndex
   range from 0 (inserts a row at the top) to \a rowCount (appends a row at the bottom).
 
   \see insertColumn
 */
 void QCPLayoutGrid::insertRow(int newIndex)
 {
     if (mElements.isEmpty() || mElements.first().isEmpty()) // if grid is completely empty, add first cell
     {
         expandTo(1, 1);
         return;
     }
 
     if (newIndex < 0)
         newIndex = 0;
     if (newIndex > rowCount())
         newIndex = rowCount();
 
     mRowStretchFactors.insert(newIndex, 1);
     QList<QCPLayoutElement *> newRow;
     for (int col = 0; col < columnCount(); ++col)
-        newRow.append((QCPLayoutElement *)0);
+        newRow.append((QCPLayoutElement *)nullptr);
     mElements.insert(newIndex, newRow);
 }
 
 /*!
   Inserts a new column with empty cells at the column index \a newIndex. Valid values for \a
   newIndex range from 0 (inserts a row at the left) to \a rowCount (appends a row at the right).
 
   \see insertRow
 */
 void QCPLayoutGrid::insertColumn(int newIndex)
 {
     if (mElements.isEmpty() || mElements.first().isEmpty()) // if grid is completely empty, add first cell
     {
         expandTo(1, 1);
         return;
     }
 
     if (newIndex < 0)
         newIndex = 0;
     if (newIndex > columnCount())
         newIndex = columnCount();
 
     mColumnStretchFactors.insert(newIndex, 1);
     for (int row = 0; row < rowCount(); ++row)
-        mElements[row].insert(newIndex, (QCPLayoutElement *)0);
+        mElements[row].insert(newIndex, (QCPLayoutElement *)nullptr);
 }
 
 /*!
   Converts the given \a row and \a column to the linear index used by some methods of \ref
   QCPLayoutGrid and \ref QCPLayout.
 
   The way the cells are indexed depends on \ref setFillOrder. If it is \ref foRowsFirst, the
   indices increase left to right and then top to bottom. If it is \ref foColumnsFirst, the indices
   increase top to bottom and then left to right.
 
   For the returned index to be valid, \a row and \a column must be valid indices themselves, i.e.
   greater or equal to zero and smaller than the current \ref rowCount/\ref columnCount.
 
   \see indexToRowCol
 */
 int QCPLayoutGrid::rowColToIndex(int row, int column) const
 {
     if (row >= 0 && row < rowCount())
     {
         if (column >= 0 && column < columnCount())
         {
             switch (mFillOrder)
             {
                 case foRowsFirst:
                     return column * rowCount() + row;
                 case foColumnsFirst:
                     return row * columnCount() + column;
             }
         }
         else
             qDebug() << Q_FUNC_INFO << "row index out of bounds:" << row;
     }
     else
         qDebug() << Q_FUNC_INFO << "column index out of bounds:" << column;
     return 0;
 }
 
 /*!
   Converts the linear index to row and column indices and writes the result to \a row and \a
   column.
 
   The way the cells are indexed depends on \ref setFillOrder. If it is \ref foRowsFirst, the
   indices increase left to right and then top to bottom. If it is \ref foColumnsFirst, the indices
   increase top to bottom and then left to right.
 
   If there are no cells (i.e. column or row count is zero), sets \a row and \a column to -1.
 
   For the retrieved \a row and \a column to be valid, the passed \a index must be valid itself,
   i.e. greater or equal to zero and smaller than the current \ref elementCount.
 
   \see rowColToIndex
 */
 void QCPLayoutGrid::indexToRowCol(int index, int &row, int &column) const
 {
     row    = -1;
     column = -1;
     if (columnCount() == 0 || rowCount() == 0)
         return;
     if (index < 0 || index >= elementCount())
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
         return;
     }
 
     switch (mFillOrder)
     {
         case foRowsFirst:
         {
             column = index / rowCount();
             row    = index % rowCount();
             break;
         }
         case foColumnsFirst:
         {
             row    = index / columnCount();
             column = index % columnCount();
             break;
         }
     }
 }
 
 /* inherits documentation from base class */
 void QCPLayoutGrid::updateLayout()
 {
     QVector<int> minColWidths, minRowHeights, maxColWidths, maxRowHeights;
     getMinimumRowColSizes(&minColWidths, &minRowHeights);
     getMaximumRowColSizes(&maxColWidths, &maxRowHeights);
 
     int totalRowSpacing = (rowCount() - 1) * mRowSpacing;
     int totalColSpacing = (columnCount() - 1) * mColumnSpacing;
     QVector<int> colWidths =
         getSectionSizes(maxColWidths, minColWidths, mColumnStretchFactors.toVector(), mRect.width() - totalColSpacing);
     QVector<int> rowHeights =
         getSectionSizes(maxRowHeights, minRowHeights, mRowStretchFactors.toVector(), mRect.height() - totalRowSpacing);
 
     // go through cells and set rects accordingly:
     int yOffset = mRect.top();
     for (int row = 0; row < rowCount(); ++row)
     {
         if (row > 0)
             yOffset += rowHeights.at(row - 1) + mRowSpacing;
         int xOffset = mRect.left();
         for (int col = 0; col < columnCount(); ++col)
         {
             if (col > 0)
                 xOffset += colWidths.at(col - 1) + mColumnSpacing;
             if (mElements.at(row).at(col))
                 mElements.at(row).at(col)->setOuterRect(QRect(xOffset, yOffset, colWidths.at(col), rowHeights.at(row)));
         }
     }
 }
 
 /*!
   \seebaseclassmethod
 
   Note that the association of the linear \a index to the row/column based cells depends on the
   current setting of \ref setFillOrder.
 
   \see rowColToIndex
 */
 QCPLayoutElement *QCPLayoutGrid::elementAt(int index) const
 {
     if (index >= 0 && index < elementCount())
     {
         int row, col;
         indexToRowCol(index, row, col);
         return mElements.at(row).at(col);
     }
     else
-        return 0;
+        return nullptr;
 }
 
 /*!
   \seebaseclassmethod
 
   Note that the association of the linear \a index to the row/column based cells depends on the
   current setting of \ref setFillOrder.
 
   \see rowColToIndex
 */
 QCPLayoutElement *QCPLayoutGrid::takeAt(int index)
 {
     if (QCPLayoutElement *el = elementAt(index))
     {
         releaseElement(el);
         int row, col;
         indexToRowCol(index, row, col);
         mElements[row][col] = 0;
         return el;
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Attempt to take invalid index:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /* inherits documentation from base class */
 bool QCPLayoutGrid::take(QCPLayoutElement *element)
 {
     if (element)
     {
         for (int i = 0; i < elementCount(); ++i)
         {
             if (elementAt(i) == element)
             {
                 takeAt(i);
                 return true;
             }
         }
         qDebug() << Q_FUNC_INFO << "Element not in this layout, couldn't take";
     }
     else
         qDebug() << Q_FUNC_INFO << "Can't take null element";
     return false;
 }
 
 /* inherits documentation from base class */
 QList<QCPLayoutElement *> QCPLayoutGrid::elements(bool recursive) const
 {
     QList<QCPLayoutElement *> result;
     const int elCount = elementCount();
 #if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
     result.reserve(elCount);
 #endif
     for (int i = 0; i < elCount; ++i)
         result.append(elementAt(i));
     if (recursive)
     {
         for (int i = 0; i < elCount; ++i)
         {
             if (result.at(i))
                 result << result.at(i)->elements(recursive);
         }
     }
     return result;
 }
 
 /*!
   Simplifies the layout by collapsing rows and columns which only contain empty cells.
 */
 void QCPLayoutGrid::simplify()
 {
     // remove rows with only empty cells:
     for (int row = rowCount() - 1; row >= 0; --row)
     {
         bool hasElements = false;
         for (int col = 0; col < columnCount(); ++col)
         {
             if (mElements.at(row).at(col))
             {
                 hasElements = true;
                 break;
             }
         }
         if (!hasElements)
         {
             mRowStretchFactors.removeAt(row);
             mElements.removeAt(row);
             if (mElements
                     .isEmpty()) // removed last element, also remove stretch factor (wouldn't happen below because also columnCount changed to 0 now)
                 mColumnStretchFactors.clear();
         }
     }
 
     // remove columns with only empty cells:
     for (int col = columnCount() - 1; col >= 0; --col)
     {
         bool hasElements = false;
         for (int row = 0; row < rowCount(); ++row)
         {
             if (mElements.at(row).at(col))
             {
                 hasElements = true;
                 break;
             }
         }
         if (!hasElements)
         {
             mColumnStretchFactors.removeAt(col);
             for (int row = 0; row < rowCount(); ++row)
                 mElements[row].removeAt(col);
         }
     }
 }
 
 /* inherits documentation from base class */
 QSize QCPLayoutGrid::minimumSizeHint() const
 {
     QVector<int> minColWidths, minRowHeights;
     getMinimumRowColSizes(&minColWidths, &minRowHeights);
     QSize result(0, 0);
     for (int i = 0; i < minColWidths.size(); ++i)
         result.rwidth() += minColWidths.at(i);
     for (int i = 0; i < minRowHeights.size(); ++i)
         result.rheight() += minRowHeights.at(i);
     result.rwidth() += qMax(0, columnCount() - 1) * mColumnSpacing + mMargins.left() + mMargins.right();
     result.rheight() += qMax(0, rowCount() - 1) * mRowSpacing + mMargins.top() + mMargins.bottom();
     return result;
 }
 
 /* inherits documentation from base class */
 QSize QCPLayoutGrid::maximumSizeHint() const
 {
     QVector<int> maxColWidths, maxRowHeights;
     getMaximumRowColSizes(&maxColWidths, &maxRowHeights);
 
     QSize result(0, 0);
     for (int i = 0; i < maxColWidths.size(); ++i)
         result.setWidth(qMin(result.width() + maxColWidths.at(i), QWIDGETSIZE_MAX));
     for (int i = 0; i < maxRowHeights.size(); ++i)
         result.setHeight(qMin(result.height() + maxRowHeights.at(i), QWIDGETSIZE_MAX));
     result.rwidth() += qMax(0, columnCount() - 1) * mColumnSpacing + mMargins.left() + mMargins.right();
     result.rheight() += qMax(0, rowCount() - 1) * mRowSpacing + mMargins.top() + mMargins.bottom();
     return result;
 }
 
 /*! \internal
 
   Places the minimum column widths and row heights into \a minColWidths and \a minRowHeights
   respectively.
 
   The minimum height of a row is the largest minimum height of any element in that row. The minimum
   width of a column is the largest minimum width of any element in that column.
 
   This is a helper function for \ref updateLayout.
 
   \see getMaximumRowColSizes
 */
 void QCPLayoutGrid::getMinimumRowColSizes(QVector<int> *minColWidths, QVector<int> *minRowHeights) const
 {
     *minColWidths  = QVector<int>(columnCount(), 0);
     *minRowHeights = QVector<int>(rowCount(), 0);
     for (int row = 0; row < rowCount(); ++row)
     {
         for (int col = 0; col < columnCount(); ++col)
         {
             if (mElements.at(row).at(col))
             {
                 QSize minHint = mElements.at(row).at(col)->minimumSizeHint();
                 QSize min     = mElements.at(row).at(col)->minimumSize();
                 QSize final(min.width() > 0 ? min.width() : minHint.width(),
                             min.height() > 0 ? min.height() : minHint.height());
                 if (minColWidths->at(col) < final.width())
                     (*minColWidths)[col] = final.width();
                 if (minRowHeights->at(row) < final.height())
                     (*minRowHeights)[row] = final.height();
             }
         }
     }
 }
 
 /*! \internal
 
   Places the maximum column widths and row heights into \a maxColWidths and \a maxRowHeights
   respectively.
 
   The maximum height of a row is the smallest maximum height of any element in that row. The
   maximum width of a column is the smallest maximum width of any element in that column.
 
   This is a helper function for \ref updateLayout.
 
   \see getMinimumRowColSizes
 */
 void QCPLayoutGrid::getMaximumRowColSizes(QVector<int> *maxColWidths, QVector<int> *maxRowHeights) const
 {
     *maxColWidths  = QVector<int>(columnCount(), QWIDGETSIZE_MAX);
     *maxRowHeights = QVector<int>(rowCount(), QWIDGETSIZE_MAX);
     for (int row = 0; row < rowCount(); ++row)
     {
         for (int col = 0; col < columnCount(); ++col)
         {
             if (mElements.at(row).at(col))
             {
                 QSize maxHint = mElements.at(row).at(col)->maximumSizeHint();
                 QSize max     = mElements.at(row).at(col)->maximumSize();
                 QSize final(max.width() < QWIDGETSIZE_MAX ? max.width() : maxHint.width(),
                             max.height() < QWIDGETSIZE_MAX ? max.height() : maxHint.height());
                 if (maxColWidths->at(col) > final.width())
                     (*maxColWidths)[col] = final.width();
                 if (maxRowHeights->at(row) > final.height())
                     (*maxRowHeights)[row] = final.height();
             }
         }
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLayoutInset
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPLayoutInset
   \brief A layout that places child elements aligned to the border or arbitrarily positioned
 
   Elements are placed either aligned to the border or at arbitrary position in the area of the
   layout. Which placement applies is controlled with the \ref InsetPlacement (\ref
   setInsetPlacement).
 
   Elements are added via \ref addElement(QCPLayoutElement *element, Qt::Alignment alignment) or
   addElement(QCPLayoutElement *element, const QRectF &rect). If the first method is used, the inset
   placement will default to \ref ipBorderAligned and the element will be aligned according to the
   \a alignment parameter. The second method defaults to \ref ipFree and allows placing elements at
   arbitrary position and size, defined by \a rect.
 
   The alignment or rect can be set via \ref setInsetAlignment or \ref setInsetRect, respectively.
 
   This is the layout that every QCPAxisRect has as \ref QCPAxisRect::insetLayout.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn virtual void QCPLayoutInset::simplify()
 
   The QCPInsetLayout does not need simplification since it can never have empty cells due to its
   linear index structure. This method does nothing.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates an instance of QCPLayoutInset and sets default values.
 */
 QCPLayoutInset::QCPLayoutInset()
 {
 }
 
 QCPLayoutInset::~QCPLayoutInset()
 {
     // clear all child layout elements. This is important because only the specific layouts know how
     // to handle removing elements (clear calls virtual removeAt method to do that).
     clear();
 }
 
 /*!
   Returns the placement type of the element with the specified \a index.
 */
 QCPLayoutInset::InsetPlacement QCPLayoutInset::insetPlacement(int index) const
 {
     if (elementAt(index))
         return mInsetPlacement.at(index);
     else
     {
         qDebug() << Q_FUNC_INFO << "Invalid element index:" << index;
         return ipFree;
     }
 }
 
 /*!
   Returns the alignment of the element with the specified \a index. The alignment only has a
   meaning, if the inset placement (\ref setInsetPlacement) is \ref ipBorderAligned.
 */
 Qt::Alignment QCPLayoutInset::insetAlignment(int index) const
 {
     if (elementAt(index))
         return mInsetAlignment.at(index);
     else
     {
         qDebug() << Q_FUNC_INFO << "Invalid element index:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*!
   Returns the rect of the element with the specified \a index. The rect only has a
   meaning, if the inset placement (\ref setInsetPlacement) is \ref ipFree.
 */
 QRectF QCPLayoutInset::insetRect(int index) const
 {
     if (elementAt(index))
         return mInsetRect.at(index);
     else
     {
         qDebug() << Q_FUNC_INFO << "Invalid element index:" << index;
         return QRectF();
     }
 }
 
 /*!
   Sets the inset placement type of the element with the specified \a index to \a placement.
 
   \see InsetPlacement
 */
 void QCPLayoutInset::setInsetPlacement(int index, QCPLayoutInset::InsetPlacement placement)
 {
     if (elementAt(index))
         mInsetPlacement[index] = placement;
     else
         qDebug() << Q_FUNC_INFO << "Invalid element index:" << index;
 }
 
 /*!
   If the inset placement (\ref setInsetPlacement) is \ref ipBorderAligned, this function
   is used to set the alignment of the element with the specified \a index to \a alignment.
 
   \a alignment is an or combination of the following alignment flags: Qt::AlignLeft,
   Qt::AlignHCenter, Qt::AlighRight, Qt::AlignTop, Qt::AlignVCenter, Qt::AlignBottom. Any other
   alignment flags will be ignored.
 */
 void QCPLayoutInset::setInsetAlignment(int index, Qt::Alignment alignment)
 {
     if (elementAt(index))
         mInsetAlignment[index] = alignment;
     else
         qDebug() << Q_FUNC_INFO << "Invalid element index:" << index;
 }
 
 /*!
   If the inset placement (\ref setInsetPlacement) is \ref ipFree, this function is used to set the
   position and size of the element with the specified \a index to \a rect.
 
   \a rect is given in fractions of the whole inset layout rect. So an inset with rect (0, 0, 1, 1)
   will span the entire layout. An inset with rect (0.6, 0.1, 0.35, 0.35) will be in the top right
   corner of the layout, with 35% width and height of the parent layout.
 
   Note that the minimum and maximum sizes of the embedded element (\ref
   QCPLayoutElement::setMinimumSize, \ref QCPLayoutElement::setMaximumSize) are enforced.
 */
 void QCPLayoutInset::setInsetRect(int index, const QRectF &rect)
 {
     if (elementAt(index))
         mInsetRect[index] = rect;
     else
         qDebug() << Q_FUNC_INFO << "Invalid element index:" << index;
 }
 
 /* inherits documentation from base class */
 void QCPLayoutInset::updateLayout()
 {
     for (int i = 0; i < mElements.size(); ++i)
     {
         QRect insetRect;
         QSize finalMinSize, finalMaxSize;
         QSize minSizeHint = mElements.at(i)->minimumSizeHint();
         QSize maxSizeHint = mElements.at(i)->maximumSizeHint();
         finalMinSize.setWidth(mElements.at(i)->minimumSize().width() > 0 ? mElements.at(i)->minimumSize().width() :
                                                                            minSizeHint.width());
         finalMinSize.setHeight(mElements.at(i)->minimumSize().height() > 0 ? mElements.at(i)->minimumSize().height() :
                                                                              minSizeHint.height());
         finalMaxSize.setWidth(mElements.at(i)->maximumSize().width() < QWIDGETSIZE_MAX ?
                                   mElements.at(i)->maximumSize().width() :
                                   maxSizeHint.width());
         finalMaxSize.setHeight(mElements.at(i)->maximumSize().height() < QWIDGETSIZE_MAX ?
                                    mElements.at(i)->maximumSize().height() :
                                    maxSizeHint.height());
         if (mInsetPlacement.at(i) == ipFree)
         {
             insetRect = QRect(rect().x() + rect().width() * mInsetRect.at(i).x(),
                               rect().y() + rect().height() * mInsetRect.at(i).y(),
                               rect().width() * mInsetRect.at(i).width(), rect().height() * mInsetRect.at(i).height());
             if (insetRect.size().width() < finalMinSize.width())
                 insetRect.setWidth(finalMinSize.width());
             if (insetRect.size().height() < finalMinSize.height())
                 insetRect.setHeight(finalMinSize.height());
             if (insetRect.size().width() > finalMaxSize.width())
                 insetRect.setWidth(finalMaxSize.width());
             if (insetRect.size().height() > finalMaxSize.height())
                 insetRect.setHeight(finalMaxSize.height());
         }
         else if (mInsetPlacement.at(i) == ipBorderAligned)
         {
             insetRect.setSize(finalMinSize);
             Qt::Alignment al = mInsetAlignment.at(i);
             if (al.testFlag(Qt::AlignLeft))
                 insetRect.moveLeft(rect().x());
             else if (al.testFlag(Qt::AlignRight))
                 insetRect.moveRight(rect().x() + rect().width());
             else
                 insetRect.moveLeft(rect().x() + rect().width() * 0.5 -
                                    finalMinSize.width() * 0.5); // default to Qt::AlignHCenter
             if (al.testFlag(Qt::AlignTop))
                 insetRect.moveTop(rect().y());
             else if (al.testFlag(Qt::AlignBottom))
                 insetRect.moveBottom(rect().y() + rect().height());
             else
                 insetRect.moveTop(rect().y() + rect().height() * 0.5 -
                                   finalMinSize.height() * 0.5); // default to Qt::AlignVCenter
         }
         mElements.at(i)->setOuterRect(insetRect);
     }
 }
 
 /* inherits documentation from base class */
 int QCPLayoutInset::elementCount() const
 {
     return mElements.size();
 }
 
 /* inherits documentation from base class */
 QCPLayoutElement *QCPLayoutInset::elementAt(int index) const
 {
     if (index >= 0 && index < mElements.size())
         return mElements.at(index);
     else
-        return 0;
+        return nullptr;
 }
 
 /* inherits documentation from base class */
 QCPLayoutElement *QCPLayoutInset::takeAt(int index)
 {
     if (QCPLayoutElement *el = elementAt(index))
     {
         releaseElement(el);
         mElements.removeAt(index);
         mInsetPlacement.removeAt(index);
         mInsetAlignment.removeAt(index);
         mInsetRect.removeAt(index);
         return el;
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Attempt to take invalid index:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /* inherits documentation from base class */
 bool QCPLayoutInset::take(QCPLayoutElement *element)
 {
     if (element)
     {
         for (int i = 0; i < elementCount(); ++i)
         {
             if (elementAt(i) == element)
             {
                 takeAt(i);
                 return true;
             }
         }
         qDebug() << Q_FUNC_INFO << "Element not in this layout, couldn't take";
     }
     else
         qDebug() << Q_FUNC_INFO << "Can't take null element";
     return false;
 }
 
 /*!
   The inset layout is sensitive to events only at areas where its (visible) child elements are
   sensitive. If the selectTest method of any of the child elements returns a positive number for \a
   pos, this method returns a value corresponding to 0.99 times the parent plot's selection
   tolerance. The inset layout is not selectable itself by default. So if \a onlySelectable is true,
   -1.0 is returned.
 
   See \ref QCPLayerable::selectTest for a general explanation of this virtual method.
 */
 double QCPLayoutInset::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable)
         return -1;
 
     for (int i = 0; i < mElements.size(); ++i)
     {
         // inset layout shall only return positive selectTest, if actually an inset object is at pos
         // else it would block the entire underlying QCPAxisRect with its surface.
         if (mElements.at(i)->realVisibility() && mElements.at(i)->selectTest(pos, onlySelectable) >= 0)
             return mParentPlot->selectionTolerance() * 0.99;
     }
     return -1;
 }
 
 /*!
   Adds the specified \a element to the layout as an inset aligned at the border (\ref
   setInsetAlignment is initialized with \ref ipBorderAligned). The alignment is set to \a
   alignment.
 
   \a alignment is an or combination of the following alignment flags: Qt::AlignLeft,
   Qt::AlignHCenter, Qt::AlighRight, Qt::AlignTop, Qt::AlignVCenter, Qt::AlignBottom. Any other
   alignment flags will be ignored.
 
   \see addElement(QCPLayoutElement *element, const QRectF &rect)
 */
 void QCPLayoutInset::addElement(QCPLayoutElement *element, Qt::Alignment alignment)
 {
     if (element)
     {
         if (element->layout()) // remove from old layout first
             element->layout()->take(element);
         mElements.append(element);
         mInsetPlacement.append(ipBorderAligned);
         mInsetAlignment.append(alignment);
         mInsetRect.append(QRectF(0.6, 0.6, 0.4, 0.4));
         adoptElement(element);
     }
     else
         qDebug() << Q_FUNC_INFO << "Can't add null element";
 }
 
 /*!
   Adds the specified \a element to the layout as an inset with free positioning/sizing (\ref
   setInsetAlignment is initialized with \ref ipFree). The position and size is set to \a
   rect.
 
   \a rect is given in fractions of the whole inset layout rect. So an inset with rect (0, 0, 1, 1)
   will span the entire layout. An inset with rect (0.6, 0.1, 0.35, 0.35) will be in the top right
   corner of the layout, with 35% width and height of the parent layout.
 
   \see addElement(QCPLayoutElement *element, Qt::Alignment alignment)
 */
 void QCPLayoutInset::addElement(QCPLayoutElement *element, const QRectF &rect)
 {
     if (element)
     {
         if (element->layout()) // remove from old layout first
             element->layout()->take(element);
         mElements.append(element);
         mInsetPlacement.append(ipFree);
         mInsetAlignment.append(Qt::AlignRight | Qt::AlignTop);
         mInsetRect.append(rect);
         adoptElement(element);
     }
     else
         qDebug() << Q_FUNC_INFO << "Can't add null element";
 }
 /* end of 'src/layout.cpp' */
 
 /* including file 'src/lineending.cpp', size 11536                           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLineEnding
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPLineEnding
   \brief Handles the different ending decorations for line-like items
 
   \image html QCPLineEnding.png "The various ending styles currently supported"
 
   For every ending a line-like item has, an instance of this class exists. For example, QCPItemLine
   has two endings which can be set with QCPItemLine::setHead and QCPItemLine::setTail.
 
   The styles themselves are defined via the enum QCPLineEnding::EndingStyle. Most decorations can
   be modified regarding width and length, see \ref setWidth and \ref setLength. The direction of
   the ending decoration (e.g. direction an arrow is pointing) is controlled by the line-like item.
   For example, when both endings of a QCPItemLine are set to be arrows, they will point to opposite
   directions, e.g. "outward". This can be changed by \ref setInverted, which would make the
   respective arrow point inward.
 
   Note that due to the overloaded QCPLineEnding constructor, you may directly specify a
   QCPLineEnding::EndingStyle where actually a QCPLineEnding is expected, e.g.
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcplineending-sethead
 */
 
 /*!
   Creates a QCPLineEnding instance with default values (style \ref esNone).
 */
 QCPLineEnding::QCPLineEnding() : mStyle(esNone), mWidth(8), mLength(10), mInverted(false)
 {
 }
 
 /*!
   Creates a QCPLineEnding instance with the specified values.
 */
 QCPLineEnding::QCPLineEnding(QCPLineEnding::EndingStyle style, double width, double length, bool inverted)
     : mStyle(style), mWidth(width), mLength(length), mInverted(inverted)
 {
 }
 
 /*!
   Sets the style of the ending decoration.
 */
 void QCPLineEnding::setStyle(QCPLineEnding::EndingStyle style)
 {
     mStyle = style;
 }
 
 /*!
   Sets the width of the ending decoration, if the style supports it. On arrows, for example, the
   width defines the size perpendicular to the arrow's pointing direction.
 
   \see setLength
 */
 void QCPLineEnding::setWidth(double width)
 {
     mWidth = width;
 }
 
 /*!
   Sets the length of the ending decoration, if the style supports it. On arrows, for example, the
   length defines the size in pointing direction.
 
   \see setWidth
 */
 void QCPLineEnding::setLength(double length)
 {
     mLength = length;
 }
 
 /*!
   Sets whether the ending decoration shall be inverted. For example, an arrow decoration will point
   inward when \a inverted is set to true.
 
   Note that also the \a width direction is inverted. For symmetrical ending styles like arrows or
   discs, this doesn't make a difference. However, asymmetric styles like \ref esHalfBar are
   affected by it, which can be used to control to which side the half bar points to.
 */
 void QCPLineEnding::setInverted(bool inverted)
 {
     mInverted = inverted;
 }
 
 /*! \internal
 
   Returns the maximum pixel radius the ending decoration might cover, starting from the position
   the decoration is drawn at (typically a line ending/\ref QCPItemPosition of an item).
 
   This is relevant for clipping. Only omit painting of the decoration when the position where the
   decoration is supposed to be drawn is farther away from the clipping rect than the returned
   distance.
 */
 double QCPLineEnding::boundingDistance() const
 {
     switch (mStyle)
     {
         case esNone:
             return 0;
 
         case esFlatArrow:
         case esSpikeArrow:
         case esLineArrow:
         case esSkewedBar:
             return qSqrt(mWidth * mWidth + mLength * mLength); // items that have width and length
 
         case esDisc:
         case esSquare:
         case esDiamond:
         case esBar:
         case esHalfBar:
             return mWidth * 1.42; // items that only have a width -> width*sqrt(2)
     }
     return 0;
 }
 
 /*!
   Starting from the origin of this line ending (which is style specific), returns the length
   covered by the line ending symbol, in backward direction.
 
   For example, the \ref esSpikeArrow has a shorter real length than a \ref esFlatArrow, even if
   both have the same \ref setLength value, because the spike arrow has an inward curved back, which
   reduces the length along its center axis (the drawing origin for arrows is at the tip).
 
   This function is used for precise, style specific placement of line endings, for example in
   QCPAxes.
 */
 double QCPLineEnding::realLength() const
 {
     switch (mStyle)
     {
         case esNone:
         case esLineArrow:
         case esSkewedBar:
         case esBar:
         case esHalfBar:
             return 0;
 
         case esFlatArrow:
             return mLength;
 
         case esDisc:
         case esSquare:
         case esDiamond:
             return mWidth * 0.5;
 
         case esSpikeArrow:
             return mLength * 0.8;
     }
     return 0;
 }
 
 /*! \internal
 
   Draws the line ending with the specified \a painter at the position \a pos. The direction of the
   line ending is controlled with \a dir.
 */
 void QCPLineEnding::draw(QCPPainter *painter, const QCPVector2D &pos, const QCPVector2D &dir) const
 {
     if (mStyle == esNone)
         return;
 
     QCPVector2D lengthVec = dir.normalized() * mLength * (mInverted ? -1 : 1);
     if (lengthVec.isNull())
         lengthVec = QCPVector2D(1, 0);
     QCPVector2D widthVec = dir.normalized().perpendicular() * mWidth * 0.5 * (mInverted ? -1 : 1);
 
     QPen penBackup     = painter->pen();
     QBrush brushBackup = painter->brush();
     QPen miterPen      = penBackup;
     miterPen.setJoinStyle(Qt::MiterJoin); // to make arrow heads spikey
     QBrush brush(painter->pen().color(), Qt::SolidPattern);
     switch (mStyle)
     {
         case esNone:
             break;
         case esFlatArrow:
         {
             QPointF points[3] = { pos.toPointF(), (pos - lengthVec + widthVec).toPointF(),
                                   (pos - lengthVec - widthVec).toPointF() };
             painter->setPen(miterPen);
             painter->setBrush(brush);
             painter->drawConvexPolygon(points, 3);
             painter->setBrush(brushBackup);
             painter->setPen(penBackup);
             break;
         }
         case esSpikeArrow:
         {
             QPointF points[4] = { pos.toPointF(), (pos - lengthVec + widthVec).toPointF(),
                                   (pos - lengthVec * 0.8).toPointF(), (pos - lengthVec - widthVec).toPointF() };
             painter->setPen(miterPen);
             painter->setBrush(brush);
             painter->drawConvexPolygon(points, 4);
             painter->setBrush(brushBackup);
             painter->setPen(penBackup);
             break;
         }
         case esLineArrow:
         {
             QPointF points[3] = { (pos - lengthVec + widthVec).toPointF(), pos.toPointF(),
                                   (pos - lengthVec - widthVec).toPointF() };
             painter->setPen(miterPen);
             painter->drawPolyline(points, 3);
             painter->setPen(penBackup);
             break;
         }
         case esDisc:
         {
             painter->setBrush(brush);
             painter->drawEllipse(pos.toPointF(), mWidth * 0.5, mWidth * 0.5);
             painter->setBrush(brushBackup);
             break;
         }
         case esSquare:
         {
             QCPVector2D widthVecPerp = widthVec.perpendicular();
             QPointF points[4]        = { (pos - widthVecPerp + widthVec).toPointF(),
                                   (pos - widthVecPerp - widthVec).toPointF(),
                                   (pos + widthVecPerp - widthVec).toPointF(),
                                   (pos + widthVecPerp + widthVec).toPointF() };
             painter->setPen(miterPen);
             painter->setBrush(brush);
             painter->drawConvexPolygon(points, 4);
             painter->setBrush(brushBackup);
             painter->setPen(penBackup);
             break;
         }
         case esDiamond:
         {
             QCPVector2D widthVecPerp = widthVec.perpendicular();
             QPointF points[4]        = { (pos - widthVecPerp).toPointF(), (pos - widthVec).toPointF(),
                                   (pos + widthVecPerp).toPointF(), (pos + widthVec).toPointF() };
             painter->setPen(miterPen);
             painter->setBrush(brush);
             painter->drawConvexPolygon(points, 4);
             painter->setBrush(brushBackup);
             painter->setPen(penBackup);
             break;
         }
         case esBar:
         {
             painter->drawLine((pos + widthVec).toPointF(), (pos - widthVec).toPointF());
             break;
         }
         case esHalfBar:
         {
             painter->drawLine((pos + widthVec).toPointF(), pos.toPointF());
             break;
         }
         case esSkewedBar:
         {
             if (qFuzzyIsNull(painter->pen().widthF()) && !painter->modes().testFlag(QCPPainter::pmNonCosmetic))
             {
                 // if drawing with cosmetic pen (perfectly thin stroke, happens only in vector exports), draw bar exactly on tip of line
                 painter->drawLine((pos + widthVec + lengthVec * 0.2 * (mInverted ? -1 : 1)).toPointF(),
                                   (pos - widthVec - lengthVec * 0.2 * (mInverted ? -1 : 1)).toPointF());
             }
             else
             {
                 // if drawing with thick (non-cosmetic) pen, shift bar a little in line direction to prevent line from sticking through bar slightly
                 painter->drawLine((pos + widthVec + lengthVec * 0.2 * (mInverted ? -1 : 1) +
                                    dir.normalized() * qMax(1.0f, (float)painter->pen().widthF()) * 0.5f)
                                       .toPointF(),
                                   (pos - widthVec - lengthVec * 0.2 * (mInverted ? -1 : 1) +
                                    dir.normalized() * qMax(1.0f, (float)painter->pen().widthF()) * 0.5f)
                                       .toPointF());
             }
             break;
         }
     }
 }
 
 /*! \internal
   \overload
 
   Draws the line ending. The direction is controlled with the \a angle parameter in radians.
 */
 void QCPLineEnding::draw(QCPPainter *painter, const QCPVector2D &pos, double angle) const
 {
     draw(painter, pos, QCPVector2D(qCos(angle), qSin(angle)));
 }
 /* end of 'src/lineending.cpp' */
 
 /* including file 'src/axis/axisticker.cpp', size 18664                      */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisTicker
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPAxisTicker
   \brief The base class tick generator used by QCPAxis to create tick positions and tick labels
 
   Each QCPAxis has an internal QCPAxisTicker (or a subclass) in order to generate tick positions
   and tick labels for the current axis range. The ticker of an axis can be set via \ref
   QCPAxis::setTicker. Since that method takes a <tt>QSharedPointer<QCPAxisTicker></tt>, multiple
   axes can share the same ticker instance.
 
   This base class generates normal tick coordinates and numeric labels for linear axes. It picks a
   reasonable tick step (the separation between ticks) which results in readable tick labels. The
   number of ticks that should be approximately generated can be set via \ref setTickCount.
   Depending on the current tick step strategy (\ref setTickStepStrategy), the algorithm either
   sacrifices readability to better match the specified tick count (\ref
   QCPAxisTicker::tssMeetTickCount) or relaxes the tick count in favor of better tick steps (\ref
   QCPAxisTicker::tssReadability), which is the default.
 
   The following more specialized axis ticker subclasses are available, see details in the
   respective class documentation:
 
   <center>
   <table>
   <tr><td style="text-align:right; padding: 0 1em">QCPAxisTickerFixed</td><td>\image html axisticker-fixed.png</td></tr>
   <tr><td style="text-align:right; padding: 0 1em">QCPAxisTickerLog</td><td>\image html axisticker-log.png</td></tr>
   <tr><td style="text-align:right; padding: 0 1em">QCPAxisTickerPi</td><td>\image html axisticker-pi.png</td></tr>
   <tr><td style="text-align:right; padding: 0 1em">QCPAxisTickerText</td><td>\image html axisticker-text.png</td></tr>
   <tr><td style="text-align:right; padding: 0 1em">QCPAxisTickerDateTime</td><td>\image html axisticker-datetime.png</td></tr>
   <tr><td style="text-align:right; padding: 0 1em">QCPAxisTickerTime</td><td>\image html axisticker-time.png
     \image html axisticker-time2.png</td></tr>
   </table>
   </center>
 
   \section axisticker-subclassing Creating own axis tickers
 
   Creating own axis tickers can be achieved very easily by sublassing QCPAxisTicker and
   reimplementing some or all of the available virtual methods.
 
   In the simplest case you might wish to just generate different tick steps than the other tickers,
   so you only reimplement the method \ref getTickStep. If you additionally want control over the
   string that will be shown as tick label, reimplement \ref getTickLabel.
 
   If you wish to have complete control, you can generate the tick vectors and tick label vectors
   yourself by reimplementing \ref createTickVector and \ref createLabelVector. The default
   implementations use the previously mentioned virtual methods \ref getTickStep and \ref
   getTickLabel, but your reimplementations don't necessarily need to do so. For example in the case
   of unequal tick steps, the method \ref getTickStep loses its usefulness and can be ignored.
 
   The sub tick count between major ticks can be controlled with \ref getSubTickCount. Full sub tick
   placement control is obtained by reimplementing \ref createSubTickVector.
 
   See the documentation of all these virtual methods in QCPAxisTicker for detailed information
   about the parameters and expected return values.
 */
 
 /*!
   Constructs the ticker and sets reasonable default values. Axis tickers are commonly created
   managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.
 */
 QCPAxisTicker::QCPAxisTicker() : mTickStepStrategy(tssReadability), mTickCount(5), mTickOrigin(0)
 {
 }
 
 QCPAxisTicker::~QCPAxisTicker()
 {
 }
 
 /*!
   Sets which strategy the axis ticker follows when choosing the size of the tick step. For the
   available strategies, see \ref TickStepStrategy.
 */
 void QCPAxisTicker::setTickStepStrategy(QCPAxisTicker::TickStepStrategy strategy)
 {
     mTickStepStrategy = strategy;
 }
 
 /*!
   Sets how many ticks this ticker shall aim to generate across the axis range. Note that \a count
   is not guaranteed to be matched exactly, as generating readable tick intervals may conflict with
   the requested number of ticks.
 
   Whether the readability has priority over meeting the requested \a count can be specified with
   \ref setTickStepStrategy.
 */
 void QCPAxisTicker::setTickCount(int count)
 {
     if (count > 0)
         mTickCount = count;
     else
         qDebug() << Q_FUNC_INFO << "tick count must be greater than zero:" << count;
 }
 
 /*!
   Sets the mathematical coordinate (or "offset") of the zeroth tick. This tick coordinate is just a
   concept and doesn't need to be inside the currently visible axis range.
 
   By default \a origin is zero, which for example yields ticks {-5, 0, 5, 10, 15,...} when the tick
   step is five. If \a origin is now set to 1 instead, the correspondingly generated ticks would be
   {-4, 1, 6, 11, 16,...}.
 */
 void QCPAxisTicker::setTickOrigin(double origin)
 {
     mTickOrigin = origin;
 }
 
 /*!
   This is the method called by QCPAxis in order to actually generate tick coordinates (\a ticks),
   tick label strings (\a tickLabels) and sub tick coordinates (\a subTicks).
 
   The ticks are generated for the specified \a range. The generated labels typically follow the
   specified \a locale, \a formatChar and number \a precision, however this might be different (or
   even irrelevant) for certain QCPAxisTicker subclasses.
 
   The output parameter \a ticks is filled with the generated tick positions in axis coordinates.
   The output parameters \a subTicks and \a tickLabels are optional (set them to 0 if not needed)
   and are respectively filled with sub tick coordinates, and tick label strings belonging to \a
   ticks by index.
 */
 void QCPAxisTicker::generate(const QCPRange &range, const QLocale &locale, QChar formatChar, int precision,
                              QVector<double> &ticks, QVector<double> *subTicks, QVector<QString> *tickLabels)
 {
     // generate (major) ticks:
     double tickStep = getTickStep(range);
     ticks           = createTickVector(tickStep, range);
     trimTicks(
         range, ticks,
         true); // trim ticks to visible range plus one outer tick on each side (incase a subclass createTickVector creates more)
 
     // generate sub ticks between major ticks:
     if (subTicks)
     {
         if (ticks.size() > 0)
         {
             *subTicks = createSubTickVector(getSubTickCount(tickStep), ticks);
             trimTicks(range, *subTicks, false);
         }
         else
             *subTicks = QVector<double>();
     }
 
     // finally trim also outliers (no further clipping happens in axis drawing):
     trimTicks(range, ticks, false);
     // generate labels for visible ticks if requested:
     if (tickLabels)
         *tickLabels = createLabelVector(ticks, locale, formatChar, precision);
 }
 
 /*! \internal
 
   Takes the entire currently visible axis range and returns a sensible tick step in
   order to provide readable tick labels as well as a reasonable number of tick counts (see \ref
   setTickCount, \ref setTickStepStrategy).
 
   If a QCPAxisTicker subclass only wants a different tick step behaviour than the default
   implementation, it should reimplement this method. See \ref cleanMantissa for a possible helper
   function.
 */
 double QCPAxisTicker::getTickStep(const QCPRange &range)
 {
     double exactStep =
         range.size() /
         (double)(mTickCount +
                  1e-10); // mTickCount ticks on average, the small addition is to prevent jitter on exact integers
     return cleanMantissa(exactStep);
 }
 
 /*! \internal
 
   Takes the \a tickStep, i.e. the distance between two consecutive ticks, and returns
   an appropriate number of sub ticks for that specific tick step.
 
   Note that a returned sub tick count of e.g. 4 will split each tick interval into 5 sections.
 */
 int QCPAxisTicker::getSubTickCount(double tickStep)
 {
     int result = 1; // default to 1, if no proper value can be found
 
     // separate integer and fractional part of mantissa:
     double epsilon = 0.01;
     double intPartf;
     int intPart;
     double fracPart = modf(getMantissa(tickStep), &intPartf);
     intPart         = intPartf;
 
     // handle cases with (almost) integer mantissa:
     if (fracPart < epsilon || 1.0 - fracPart < epsilon)
     {
         if (1.0 - fracPart < epsilon)
             ++intPart;
         switch (intPart)
         {
             case 1:
                 result = 4;
                 break; // 1.0 -> 0.2 substep
             case 2:
                 result = 3;
                 break; // 2.0 -> 0.5 substep
             case 3:
                 result = 2;
                 break; // 3.0 -> 1.0 substep
             case 4:
                 result = 3;
                 break; // 4.0 -> 1.0 substep
             case 5:
                 result = 4;
                 break; // 5.0 -> 1.0 substep
             case 6:
                 result = 2;
                 break; // 6.0 -> 2.0 substep
             case 7:
                 result = 6;
                 break; // 7.0 -> 1.0 substep
             case 8:
                 result = 3;
                 break; // 8.0 -> 2.0 substep
             case 9:
                 result = 2;
                 break; // 9.0 -> 3.0 substep
         }
     }
     else
     {
         // handle cases with significantly fractional mantissa:
         if (qAbs(fracPart - 0.5) < epsilon) // *.5 mantissa
         {
             switch (intPart)
             {
                 case 1:
                     result = 2;
                     break; // 1.5 -> 0.5 substep
                 case 2:
                     result = 4;
                     break; // 2.5 -> 0.5 substep
                 case 3:
                     result = 4;
                     break; // 3.5 -> 0.7 substep
                 case 4:
                     result = 2;
                     break; // 4.5 -> 1.5 substep
                 case 5:
                     result = 4;
                     break; // 5.5 -> 1.1 substep (won't occur with default getTickStep from here on)
                 case 6:
                     result = 4;
                     break; // 6.5 -> 1.3 substep
                 case 7:
                     result = 2;
                     break; // 7.5 -> 2.5 substep
                 case 8:
                     result = 4;
                     break; // 8.5 -> 1.7 substep
                 case 9:
                     result = 4;
                     break; // 9.5 -> 1.9 substep
             }
         }
         // if mantissa fraction isn't 0.0 or 0.5, don't bother finding good sub tick marks, leave default
     }
 
     return result;
 }
 
 /*! \internal
 
   This method returns the tick label string as it should be printed under the \a tick coordinate.
   If a textual number is returned, it should respect the provided \a locale, \a formatChar and \a
   precision.
 
   If the returned value contains exponentials of the form "2e5" and beautifully typeset powers is
   enabled in the QCPAxis number format (\ref QCPAxis::setNumberFormat), the exponential part will
   be formatted accordingly using multiplication symbol and superscript during rendering of the
   label automatically.
 */
 QString QCPAxisTicker::getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision)
 {
     return locale.toString(tick, formatChar.toLatin1(), precision);
 }
 
 /*! \internal
 
   Returns a vector containing all coordinates of sub ticks that should be drawn. It generates \a
   subTickCount sub ticks between each tick pair given in \a ticks.
 
   If a QCPAxisTicker subclass needs maximal control over the generated sub ticks, it should
   reimplement this method. Depending on the purpose of the subclass it doesn't necessarily need to
   base its result on \a subTickCount or \a ticks.
 */
 QVector<double> QCPAxisTicker::createSubTickVector(int subTickCount, const QVector<double> &ticks)
 {
     QVector<double> result;
     if (subTickCount <= 0 || ticks.size() < 2)
         return result;
 
     result.reserve((ticks.size() - 1) * subTickCount);
     for (int i = 1; i < ticks.size(); ++i)
     {
         double subTickStep = (ticks.at(i) - ticks.at(i - 1)) / (double)(subTickCount + 1);
         for (int k = 1; k <= subTickCount; ++k)
             result.append(ticks.at(i - 1) + k * subTickStep);
     }
     return result;
 }
 
 /*! \internal
 
   Returns a vector containing all coordinates of ticks that should be drawn. The default
   implementation generates ticks with a spacing of \a tickStep (mathematically starting at the tick
   step origin, see \ref setTickOrigin) distributed over the passed \a range.
 
   In order for the axis ticker to generate proper sub ticks, it is necessary that the first and
   last tick coordinates returned by this method are just below/above the provided \a range.
   Otherwise the outer intervals won't contain any sub ticks.
 
   If a QCPAxisTicker subclass needs maximal control over the generated ticks, it should reimplement
   this method. Depending on the purpose of the subclass it doesn't necessarily need to base its
   result on \a tickStep, e.g. when the ticks are spaced unequally like in the case of
   QCPAxisTickerLog.
 */
 QVector<double> QCPAxisTicker::createTickVector(double tickStep, const QCPRange &range)
 {
     QVector<double> result;
     // Generate tick positions according to tickStep:
     qint64 firstStep =
         floor((range.lower - mTickOrigin) / tickStep); // do not use qFloor here, or we'll lose 64 bit precision
     qint64 lastStep =
         ceil((range.upper - mTickOrigin) / tickStep); // do not use qCeil here, or we'll lose 64 bit precision
     int tickcount = lastStep - firstStep + 1;
     if (tickcount < 0)
         tickcount = 0;
     result.resize(tickcount);
     for (int i = 0; i < tickcount; ++i)
         result[i] = mTickOrigin + (firstStep + i) * tickStep;
     return result;
 }
 
 /*! \internal
 
   Returns a vector containing all tick label strings corresponding to the tick coordinates provided
   in \a ticks. The default implementation calls \ref getTickLabel to generate the respective
   strings.
 
   It is possible but uncommon for QCPAxisTicker subclasses to reimplement this method, as
   reimplementing \ref getTickLabel often achieves the intended result easier.
 */
 QVector<QString> QCPAxisTicker::createLabelVector(const QVector<double> &ticks, const QLocale &locale, QChar formatChar,
                                                   int precision)
 {
     QVector<QString> result;
     result.reserve(ticks.size());
     for (int i = 0; i < ticks.size(); ++i)
         result.append(getTickLabel(ticks.at(i), locale, formatChar, precision));
     return result;
 }
 
 /*! \internal
 
   Removes tick coordinates from \a ticks which lie outside the specified \a range. If \a
   keepOneOutlier is true, it preserves one tick just outside the range on both sides, if present.
 
   The passed \a ticks must be sorted in ascending order.
 */
 void QCPAxisTicker::trimTicks(const QCPRange &range, QVector<double> &ticks, bool keepOneOutlier) const
 {
     bool lowFound  = false;
     bool highFound = false;
     int lowIndex   = 0;
     int highIndex  = -1;
 
     for (int i = 0; i < ticks.size(); ++i)
     {
         if (ticks.at(i) >= range.lower)
         {
             lowFound = true;
             lowIndex = i;
             break;
         }
     }
     for (int i = ticks.size() - 1; i >= 0; --i)
     {
         if (ticks.at(i) <= range.upper)
         {
             highFound = true;
             highIndex = i;
             break;
         }
     }
 
     if (highFound && lowFound)
     {
         int trimFront = qMax(0, lowIndex - (keepOneOutlier ? 1 : 0));
         int trimBack  = qMax(0, ticks.size() - (keepOneOutlier ? 2 : 1) - highIndex);
         if (trimFront > 0 || trimBack > 0)
             ticks = ticks.mid(trimFront, ticks.size() - trimFront - trimBack);
     }
     else // all ticks are either all below or all above the range
         ticks.clear();
 }
 
 /*! \internal
 
   Returns the coordinate contained in \a candidates which is closest to the provided \a target.
 
   This method assumes \a candidates is not empty and sorted in ascending order.
 */
 double QCPAxisTicker::pickClosest(double target, const QVector<double> &candidates) const
 {
     if (candidates.size() == 1)
         return candidates.first();
     QVector<double>::const_iterator it = std::lower_bound(candidates.constBegin(), candidates.constEnd(), target);
     if (it == candidates.constEnd())
         return *(it - 1);
     else if (it == candidates.constBegin())
         return *it;
     else
         return target - *(it - 1) < *it - target ? *(it - 1) : *it;
 }
 
 /*! \internal
 
   Returns the decimal mantissa of \a input. Optionally, if \a magnitude is not set to zero, it also
   returns the magnitude of \a input as a power of 10.
 
   For example, an input of 142.6 will return a mantissa of 1.426 and a magnitude of 100.
 */
 double QCPAxisTicker::getMantissa(double input, double *magnitude) const
 {
     const double mag = qPow(10.0, qFloor(qLn(input) / qLn(10.0)));
     if (magnitude)
         *magnitude = mag;
     return input / mag;
 }
 
 /*! \internal
 
   Returns a number that is close to \a input but has a clean, easier human readable mantissa. How
   strongly the mantissa is altered, and thus how strong the result deviates from the original \a
   input, depends on the current tick step strategy (see \ref setTickStepStrategy).
 */
 double QCPAxisTicker::cleanMantissa(double input) const
 {
     double magnitude;
     const double mantissa = getMantissa(input, &magnitude);
     switch (mTickStepStrategy)
     {
         case tssReadability:
         {
             return pickClosest(mantissa, QVector<double>() << 1.0 << 2.0 << 2.5 << 5.0 << 10.0) * magnitude;
         }
         case tssMeetTickCount:
         {
             // this gives effectively a mantissa of 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6.0, 8.0, 10.0
             if (mantissa <= 5.0)
                 return (int)(mantissa * 2) / 2.0 * magnitude; // round digit after decimal point to 0.5
             else
                 return (int)(mantissa / 2.0) * 2.0 * magnitude; // round to first digit in multiples of 2
         }
     }
     return input;
 }
 /* end of 'src/axis/axisticker.cpp' */
 
 /* including file 'src/axis/axistickerdatetime.cpp', size 14443              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisTickerDateTime
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPAxisTickerDateTime
   \brief Specialized axis ticker for calendar dates and times as axis ticks
 
   \image html axisticker-datetime.png
 
   This QCPAxisTicker subclass generates ticks that correspond to real calendar dates and times. The
   plot axis coordinate is interpreted as Unix Time, so seconds since Epoch (January 1, 1970, 00:00
   UTC). This is also used for example by QDateTime in the <tt>toTime_t()/setTime_t()</tt> methods
   with a precision of one second. Since Qt 4.7, millisecond accuracy can be obtained from QDateTime
   by using <tt>QDateTime::fromMSecsSinceEpoch()/1000.0</tt>. The static methods \ref dateTimeToKey
   and \ref keyToDateTime conveniently perform this conversion achieving a precision of one
   millisecond on all Qt versions.
 
   The format of the date/time display in the tick labels is controlled with \ref setDateTimeFormat.
   If a different time spec (time zone) shall be used, see \ref setDateTimeSpec.
 
   This ticker produces unequal tick spacing in order to provide intuitive date and time-of-day
   ticks. For example, if the axis range spans a few years such that there is one tick per year,
   ticks will be positioned on 1. January of every year. This is intuitive but, due to leap years,
   will result in slightly unequal tick intervals (visually unnoticeable). The same can be seen in
   the image above: even though the number of days varies month by month, this ticker generates
   ticks on the same day of each month.
 
   If you would like to change the date/time that is used as a (mathematical) starting date for the
   ticks, use the \ref setTickOrigin(const QDateTime &origin) method overload, which takes a
   QDateTime. If you pass 15. July, 9:45 to this method, the yearly ticks will end up on 15. July at
   9:45 of every year.
 
   The ticker can be created and assigned to an axis like this:
   \snippet documentation/doc-image-generator/mainwindow.cpp axistickerdatetime-creation
 
   \note If you rather wish to display relative times in terms of days, hours, minutes, seconds and
   milliseconds, and are not interested in the intricacies of real calendar dates with months and
   (leap) years, have a look at QCPAxisTickerTime instead.
 */
 
 /*!
   Constructs the ticker and sets reasonable default values. Axis tickers are commonly created
   managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.
 */
 QCPAxisTickerDateTime::QCPAxisTickerDateTime()
     : mDateTimeFormat(QLatin1String("hh:mm:ss\ndd.MM.yy")), mDateTimeSpec(Qt::LocalTime), mDateStrategy(dsNone)
 {
     setTickCount(4);
 }
 
 /*!
   Sets the format in which dates and times are displayed as tick labels. For details about the \a
   format string, see the documentation of QDateTime::toString().
 
   Newlines can be inserted with "\n".
 
   \see setDateTimeSpec
 */
 void QCPAxisTickerDateTime::setDateTimeFormat(const QString &format)
 {
     mDateTimeFormat = format;
 }
 
 /*!
   Sets the time spec that is used for creating the tick labels from corresponding dates/times.
 
   The default value of QDateTime objects (and also QCPAxisTickerDateTime) is
   <tt>Qt::LocalTime</tt>. However, if the date time values passed to QCustomPlot (e.g. in the form
   of axis ranges or keys of a plottable) are given in the UTC spec, set \a spec to <tt>Qt::UTC</tt>
   to get the correct axis labels.
 
   \see setDateTimeFormat
 */
 void QCPAxisTickerDateTime::setDateTimeSpec(Qt::TimeSpec spec)
 {
     mDateTimeSpec = spec;
 }
 
 /*!
   Sets the tick origin (see \ref QCPAxisTicker::setTickOrigin) in seconds since Epoch (1. Jan 1970,
   00:00 UTC). For the date time ticker it might be more intuitive to use the overload which
   directly takes a QDateTime, see \ref setTickOrigin(const QDateTime &origin).
 
   This is useful to define the month/day/time recurring at greater tick interval steps. For
   example, If you pass 15. July, 9:45 to this method and the tick interval happens to be one tick
   per year, the ticks will end up on 15. July at 9:45 of every year.
 */
 void QCPAxisTickerDateTime::setTickOrigin(double origin)
 {
     QCPAxisTicker::setTickOrigin(origin);
 }
 
 /*!
   Sets the tick origin (see \ref QCPAxisTicker::setTickOrigin) as a QDateTime \a origin.
 
   This is useful to define the month/day/time recurring at greater tick interval steps. For
   example, If you pass 15. July, 9:45 to this method and the tick interval happens to be one tick
   per year, the ticks will end up on 15. July at 9:45 of every year.
 */
 void QCPAxisTickerDateTime::setTickOrigin(const QDateTime &origin)
 {
     setTickOrigin(dateTimeToKey(origin));
 }
 
 /*! \internal
 
   Returns a sensible tick step with intervals appropriate for a date-time-display, such as weekly,
   monthly, bi-monthly, etc.
 
   Note that this tick step isn't used exactly when generating the tick vector in \ref
   createTickVector, but only as a guiding value requiring some correction for each individual tick
   interval. Otherwise this would lead to unintuitive date displays, e.g. jumping between first day
   in the month to the last day in the previous month from tick to tick, due to the non-uniform
   length of months. The same problem arises with leap years.
 
   \seebaseclassmethod
 */
 double QCPAxisTickerDateTime::getTickStep(const QCPRange &range)
 {
     double result =
         range.size() /
         (double)(mTickCount +
                  1e-10); // mTickCount ticks on average, the small addition is to prevent jitter on exact integers
 
     mDateStrategy = dsNone;
     if (result < 1) // ideal tick step is below 1 second -> use normal clean mantissa algorithm in units of seconds
     {
         result = cleanMantissa(result);
     }
     else if (result < 86400 * 30.4375 * 12) // below a year
     {
         result = pickClosest(
             result, QVector<double>() << 1 << 2.5 << 5 << 10 << 15 << 30 << 60 << 2.5 * 60 << 5 * 60 << 10 * 60
                                       << 15 * 60 << 30 * 60 << 60 * 60 // second, minute, hour range
                                       << 3600 * 2 << 3600 * 3 << 3600 * 6 << 3600 * 12 << 3600 * 24 // hour to day range
                                       << 86400 * 2 << 86400 * 5 << 86400 * 7 << 86400 * 14 << 86400 * 30.4375
                                       << 86400 * 30.4375 * 2 << 86400 * 30.4375 * 3 << 86400 * 30.4375 * 6
                                       << 86400 * 30.4375 *
                                              12); // day, week, month range (avg. days per month includes leap years)
         if (result > 86400 * 30.4375 - 1)         // month tick intervals or larger
             mDateStrategy = dsUniformDayInMonth;
         else if (result > 3600 * 24 - 1) // day tick intervals or larger
             mDateStrategy = dsUniformTimeInDay;
     }
     else // more than a year, go back to normal clean mantissa algorithm but in units of years
     {
         const double secondsPerYear = 86400 * 30.4375 * 12; // average including leap years
         result                      = cleanMantissa(result / secondsPerYear) * secondsPerYear;
         mDateStrategy               = dsUniformDayInMonth;
     }
     return result;
 }
 
 /*! \internal
 
   Returns a sensible sub tick count with intervals appropriate for a date-time-display, such as weekly,
   monthly, bi-monthly, etc.
 
   \seebaseclassmethod
 */
 int QCPAxisTickerDateTime::getSubTickCount(double tickStep)
 {
     int result = QCPAxisTicker::getSubTickCount(tickStep);
     switch (qRound(
         tickStep)) // hand chosen subticks for specific minute/hour/day/week/month range (as specified in getTickStep)
     {
         case 5 * 60:
             result = 4;
             break;
         case 10 * 60:
             result = 1;
             break;
         case 15 * 60:
             result = 2;
             break;
         case 30 * 60:
             result = 1;
             break;
         case 60 * 60:
             result = 3;
             break;
         case 3600 * 2:
             result = 3;
             break;
         case 3600 * 3:
             result = 2;
             break;
         case 3600 * 6:
             result = 1;
             break;
         case 3600 * 12:
             result = 3;
             break;
         case 3600 * 24:
             result = 3;
             break;
         case 86400 * 2:
             result = 1;
             break;
         case 86400 * 5:
             result = 4;
             break;
         case 86400 * 7:
             result = 6;
             break;
         case 86400 * 14:
             result = 1;
             break;
         case (int)(86400 * 30.4375 + 0.5):
             result = 3;
             break;
         case (int)(86400 * 30.4375 * 2 + 0.5):
             result = 1;
             break;
         case (int)(86400 * 30.4375 * 3 + 0.5):
             result = 2;
             break;
         case (int)(86400 * 30.4375 * 6 + 0.5):
             result = 5;
             break;
         case (int)(86400 * 30.4375 * 12 + 0.5):
             result = 3;
             break;
     }
     return result;
 }
 
 /*! \internal
 
   Generates a date/time tick label for tick coordinate \a tick, based on the currently set format
   (\ref setDateTimeFormat) and time spec (\ref setDateTimeSpec).
 
   \seebaseclassmethod
 */
 QString QCPAxisTickerDateTime::getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision)
 {
     Q_UNUSED(precision)
     Q_UNUSED(formatChar)
     return locale.toString(keyToDateTime(tick).toTimeSpec(mDateTimeSpec), mDateTimeFormat);
 }
 
 /*! \internal
 
   Uses the passed \a tickStep as a guiding value and applies corrections in order to obtain
   non-uniform tick intervals but intuitive tick labels, e.g. falling on the same day of each month.
 
   \seebaseclassmethod
 */
 QVector<double> QCPAxisTickerDateTime::createTickVector(double tickStep, const QCPRange &range)
 {
     QVector<double> result = QCPAxisTicker::createTickVector(tickStep, range);
     if (!result.isEmpty())
     {
         if (mDateStrategy == dsUniformTimeInDay)
         {
             QDateTime uniformDateTime =
                 keyToDateTime(mTickOrigin); // the time of this datetime will be set for all other ticks, if possible
             QDateTime tickDateTime;
             for (int i = 0; i < result.size(); ++i)
             {
                 tickDateTime = keyToDateTime(result.at(i));
                 tickDateTime.setTime(uniformDateTime.time());
                 result[i] = dateTimeToKey(tickDateTime);
             }
         }
         else if (mDateStrategy == dsUniformDayInMonth)
         {
             QDateTime uniformDateTime =
                 keyToDateTime(mTickOrigin); // this day (in month) and time will be set for all other ticks, if possible
             QDateTime tickDateTime;
             for (int i = 0; i < result.size(); ++i)
             {
                 tickDateTime = keyToDateTime(result.at(i));
                 tickDateTime.setTime(uniformDateTime.time());
                 int thisUniformDay =
                     uniformDateTime.date().day() <= tickDateTime.date().daysInMonth() ?
                         uniformDateTime.date().day() :
                         tickDateTime.date().daysInMonth(); // don't exceed month (e.g. try to set day 31 in February)
                 if (thisUniformDay - tickDateTime.date().day() <
                     -15) // with leap years involved, date month may jump backwards or forwards, and needs to be corrected before setting day
                     tickDateTime = tickDateTime.addMonths(1);
                 else if (
                     thisUniformDay - tickDateTime.date().day() >
                     15) // with leap years involved, date month may jump backwards or forwards, and needs to be corrected before setting day
                     tickDateTime = tickDateTime.addMonths(-1);
                 tickDateTime.setDate(QDate(tickDateTime.date().year(), tickDateTime.date().month(), thisUniformDay));
                 result[i] = dateTimeToKey(tickDateTime);
             }
         }
     }
     return result;
 }
 
 /*!
   A convenience method which turns \a key (in seconds since Epoch 1. Jan 1970, 00:00 UTC) into a
   QDateTime object. This can be used to turn axis coordinates to actual QDateTimes.
 
   The accuracy achieved by this method is one millisecond, irrespective of the used Qt version (it
   works around the lack of a QDateTime::fromMSecsSinceEpoch in Qt 4.6)
 
   \see dateTimeToKey
 */
 QDateTime QCPAxisTickerDateTime::keyToDateTime(double key)
 {
 #if QT_VERSION < QT_VERSION_CHECK(4, 7, 0)
     return QDateTime::fromTime_t(key).addMSecs((key - (qint64)key) * 1000);
 #else
     return QDateTime::fromMSecsSinceEpoch(key * 1000.0);
 #endif
 }
 
 /*! \overload
 
   A convenience method which turns a QDateTime object into a double value that corresponds to
   seconds since Epoch (1. Jan 1970, 00:00 UTC). This is the format used as axis coordinates by
   QCPAxisTickerDateTime.
 
   The accuracy achieved by this method is one millisecond, irrespective of the used Qt version (it
   works around the lack of a QDateTime::toMSecsSinceEpoch in Qt 4.6)
 
   \see keyToDateTime
 */
 double QCPAxisTickerDateTime::dateTimeToKey(const QDateTime dateTime)
 {
 #if QT_VERSION < QT_VERSION_CHECK(4, 7, 0)
     return dateTime.toTime_t() + dateTime.time().msec() / 1000.0;
 #else
     return dateTime.toMSecsSinceEpoch() / 1000.0;
 #endif
 }
 
 /*! \overload
 
   A convenience method which turns a QDate object into a double value that corresponds to
   seconds since Epoch (1. Jan 1970, 00:00 UTC). This is the format used as axis coordinates by
   QCPAxisTickerDateTime.
 
   \see keyToDateTime
 */
 double QCPAxisTickerDateTime::dateTimeToKey(const QDate date)
 {
 #if QT_VERSION < QT_VERSION_CHECK(4, 7, 0)
     return QDateTime(date).toTime_t();
 #else
     return QDateTime(date).toMSecsSinceEpoch() / 1000.0;
 #endif
 }
 /* end of 'src/axis/axistickerdatetime.cpp' */
 
 /* including file 'src/axis/axistickertime.cpp', size 11747                  */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisTickerTime
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPAxisTickerTime
   \brief Specialized axis ticker for time spans in units of milliseconds to days
 
   \image html axisticker-time.png
 
   This QCPAxisTicker subclass generates ticks that corresponds to time intervals.
 
   The format of the time display in the tick labels is controlled with \ref setTimeFormat and \ref
   setFieldWidth. The time coordinate is in the unit of seconds with respect to the time coordinate
   zero. Unlike with QCPAxisTickerDateTime, the ticks don't correspond to a specific calendar date
   and time.
 
   The time can be displayed in milliseconds, seconds, minutes, hours and days. Depending on the
   largest available unit in the format specified with \ref setTimeFormat, any time spans above will
   be carried in that largest unit. So for example if the format string is "%m:%s" and a tick at
   coordinate value 7815 (being 2 hours, 10 minutes and 15 seconds) is created, the resulting tick
   label will show "130:15" (130 minutes, 15 seconds). If the format string is "%h:%m:%s", the hour
   unit will be used and the label will thus be "02:10:15". Negative times with respect to the axis
   zero will carry a leading minus sign.
 
   The ticker can be created and assigned to an axis like this:
   \snippet documentation/doc-image-generator/mainwindow.cpp axistickertime-creation
 
   Here is an example of a time axis providing time information in days, hours and minutes. Due to
   the axis range spanning a few days and the wanted tick count (\ref setTickCount), the ticker
   decided to use tick steps of 12 hours:
 
   \image html axisticker-time2.png
 
   The format string for this example is
   \snippet documentation/doc-image-generator/mainwindow.cpp axistickertime-creation-2
 
   \note If you rather wish to display calendar dates and times, have a look at QCPAxisTickerDateTime
   instead.
 */
 
 /*!
   Constructs the ticker and sets reasonable default values. Axis tickers are commonly created
   managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.
 */
 QCPAxisTickerTime::QCPAxisTickerTime()
     : mTimeFormat(QLatin1String("%h:%m:%s")), mSmallestUnit(tuSeconds), mBiggestUnit(tuHours)
 {
     setTickCount(4);
     mFieldWidth[tuMilliseconds] = 3;
     mFieldWidth[tuSeconds]      = 2;
     mFieldWidth[tuMinutes]      = 2;
     mFieldWidth[tuHours]        = 2;
     mFieldWidth[tuDays]         = 1;
 
     mFormatPattern[tuMilliseconds] = QLatin1String("%z");
     mFormatPattern[tuSeconds]      = QLatin1String("%s");
     mFormatPattern[tuMinutes]      = QLatin1String("%m");
     mFormatPattern[tuHours]        = QLatin1String("%h");
     mFormatPattern[tuDays]         = QLatin1String("%d");
 }
 
 /*!
   Sets the format that will be used to display time in the tick labels.
 
   The available patterns are:
   - %%z for milliseconds
   - %%s for seconds
   - %%m for minutes
   - %%h for hours
   - %%d for days
 
   The field width (zero padding) can be controlled for each unit with \ref setFieldWidth.
 
   The largest unit that appears in \a format will carry all the remaining time of a certain tick
   coordinate, even if it overflows the natural limit of the unit. For example, if %%m is the
   largest unit it might become larger than 59 in order to consume larger time values. If on the
   other hand %%h is available, the minutes will wrap around to zero after 59 and the time will
   carry to the hour digit.
 */
 void QCPAxisTickerTime::setTimeFormat(const QString &format)
 {
     mTimeFormat = format;
 
     // determine smallest and biggest unit in format, to optimize unit replacement and allow biggest
     // unit to consume remaining time of a tick value and grow beyond its modulo (e.g. min > 59)
     mSmallestUnit    = tuMilliseconds;
     mBiggestUnit     = tuMilliseconds;
     bool hasSmallest = false;
     for (int i = tuMilliseconds; i <= tuDays; ++i)
     {
         TimeUnit unit = static_cast<TimeUnit>(i);
         if (mTimeFormat.contains(mFormatPattern.value(unit)))
         {
             if (!hasSmallest)
             {
                 mSmallestUnit = unit;
                 hasSmallest   = true;
             }
             mBiggestUnit = unit;
         }
     }
 }
 
 /*!
   Sets the field widh of the specified \a unit to be \a width digits, when displayed in the tick
   label. If the number for the specific unit is shorter than \a width, it will be padded with an
   according number of zeros to the left in order to reach the field width.
 
   \see setTimeFormat
 */
 void QCPAxisTickerTime::setFieldWidth(QCPAxisTickerTime::TimeUnit unit, int width)
 {
     mFieldWidth[unit] = qMax(width, 1);
 }
 
 /*! \internal
 
   Returns the tick step appropriate for time displays, depending on the provided \a range and the
   smallest available time unit in the current format (\ref setTimeFormat). For example if the unit
   of seconds isn't available in the format, this method will not generate steps (like 2.5 minutes)
   that require sub-minute precision to be displayed correctly.
 
   \seebaseclassmethod
 */
 double QCPAxisTickerTime::getTickStep(const QCPRange &range)
 {
     double result =
         range.size() /
         (double)(mTickCount +
                  1e-10); // mTickCount ticks on average, the small addition is to prevent jitter on exact integers
 
     if (result < 1) // ideal tick step is below 1 second -> use normal clean mantissa algorithm in units of seconds
     {
         if (mSmallestUnit == tuMilliseconds)
             result = qMax(cleanMantissa(result), 0.001); // smallest tick step is 1 millisecond
         else // have no milliseconds available in format, so stick with 1 second tickstep
             result = 1.0;
     }
     else if (result < 3600 * 24) // below a day
     {
         // the filling of availableSteps seems a bit contorted but it fills in a sorted fashion and thus saves a post-fill sorting run
         QVector<double> availableSteps;
         // seconds range:
         if (mSmallestUnit <= tuSeconds)
             availableSteps << 1;
         if (mSmallestUnit == tuMilliseconds)
             availableSteps << 2.5; // only allow half second steps if milliseconds are there to display it
         else if (mSmallestUnit == tuSeconds)
             availableSteps << 2;
         if (mSmallestUnit <= tuSeconds)
             availableSteps << 5 << 10 << 15 << 30;
         // minutes range:
         if (mSmallestUnit <= tuMinutes)
             availableSteps << 1 * 60;
         if (mSmallestUnit <= tuSeconds)
             availableSteps << 2.5 * 60; // only allow half minute steps if seconds are there to display it
         else if (mSmallestUnit == tuMinutes)
             availableSteps << 2 * 60;
         if (mSmallestUnit <= tuMinutes)
             availableSteps << 5 * 60 << 10 * 60 << 15 * 60 << 30 * 60;
         // hours range:
         if (mSmallestUnit <= tuHours)
             availableSteps << 1 * 3600 << 2 * 3600 << 3 * 3600 << 6 * 3600 << 12 * 3600 << 24 * 3600;
         // pick available step that is most appropriate to approximate ideal step:
         result = pickClosest(result, availableSteps);
     }
     else // more than a day, go back to normal clean mantissa algorithm but in units of days
     {
         const double secondsPerDay = 3600 * 24;
         result                     = cleanMantissa(result / secondsPerDay) * secondsPerDay;
     }
     return result;
 }
 
 /*! \internal
 
   Returns the sub tick count appropriate for the provided \a tickStep and time displays.
 
   \seebaseclassmethod
 */
 int QCPAxisTickerTime::getSubTickCount(double tickStep)
 {
     int result = QCPAxisTicker::getSubTickCount(tickStep);
     switch (qRound(tickStep)) // hand chosen subticks for specific minute/hour/day range (as specified in getTickStep)
     {
         case 5 * 60:
             result = 4;
             break;
         case 10 * 60:
             result = 1;
             break;
         case 15 * 60:
             result = 2;
             break;
         case 30 * 60:
             result = 1;
             break;
         case 60 * 60:
             result = 3;
             break;
         case 3600 * 2:
             result = 3;
             break;
         case 3600 * 3:
             result = 2;
             break;
         case 3600 * 6:
             result = 1;
             break;
         case 3600 * 12:
             result = 3;
             break;
         case 3600 * 24:
             result = 3;
             break;
     }
     return result;
 }
 
 /*! \internal
 
   Returns the tick label corresponding to the provided \a tick and the configured format and field
   widths (\ref setTimeFormat, \ref setFieldWidth).
 
   \seebaseclassmethod
 */
 QString QCPAxisTickerTime::getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision)
 {
     Q_UNUSED(precision)
     Q_UNUSED(formatChar)
     Q_UNUSED(locale)
     bool negative = tick < 0;
     if (negative)
         tick *= -1;
     double values[tuDays + 1]; // contains the msec/sec/min/... value with its respective modulo (e.g. minute 0..59)
     double restValues
         [tuDays +
          1]; // contains the msec/sec/min/... value as if it's the largest available unit and thus consumes the remaining time
 
     restValues[tuMilliseconds] = tick * 1000;
     values[tuMilliseconds]     = modf(restValues[tuMilliseconds] / 1000, &restValues[tuSeconds]) * 1000;
     values[tuSeconds]          = modf(restValues[tuSeconds] / 60, &restValues[tuMinutes]) * 60;
     values[tuMinutes]          = modf(restValues[tuMinutes] / 60, &restValues[tuHours]) * 60;
     values[tuHours]            = modf(restValues[tuHours] / 24, &restValues[tuDays]) * 24;
     // no need to set values[tuDays] because days are always a rest value (there is no higher unit so it consumes all remaining time)
 
     // 2017-07-03: JM force wrap of hours value
     if (restValues[tuHours] > 24)
         restValues[tuHours] -= 24;
 
     QString result = mTimeFormat;
     for (int i = mSmallestUnit; i <= mBiggestUnit; ++i)
     {
         TimeUnit iUnit = static_cast<TimeUnit>(i);
         replaceUnit(result, iUnit, qRound(iUnit == mBiggestUnit ? restValues[iUnit] : values[iUnit]));
     }
     if (negative)
         result.prepend(QLatin1Char('-'));
     return result;
 }
 
 /*! \internal
 
   Replaces all occurrences of the format pattern belonging to \a unit in \a text with the specified
   \a value, using the field width as specified with \ref setFieldWidth for the \a unit.
 */
 void QCPAxisTickerTime::replaceUnit(QString &text, QCPAxisTickerTime::TimeUnit unit, int value) const
 {
     QString valueStr = QString::number(value);
     while (valueStr.size() < mFieldWidth.value(unit))
         valueStr.prepend(QLatin1Char('0'));
 
     text.replace(mFormatPattern.value(unit), valueStr);
 }
 /* end of 'src/axis/axistickertime.cpp' */
 
 /* including file 'src/axis/axistickerfixed.cpp', size 5583                  */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisTickerFixed
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPAxisTickerFixed
   \brief Specialized axis ticker with a fixed tick step
 
   \image html axisticker-fixed.png
 
   This QCPAxisTicker subclass generates ticks with a fixed tick step set with \ref setTickStep. It
   is also possible to allow integer multiples and integer powers of the specified tick step with
   \ref setScaleStrategy.
 
   A typical application of this ticker is to make an axis only display integers, by setting the
   tick step of the ticker to 1.0 and the scale strategy to \ref ssMultiples.
 
   Another case is when a certain number has a special meaning and axis ticks should only appear at
   multiples of that value. In this case you might also want to consider \ref QCPAxisTickerPi
   because despite the name it is not limited to only pi symbols/values.
 
   The ticker can be created and assigned to an axis like this:
   \snippet documentation/doc-image-generator/mainwindow.cpp axistickerfixed-creation
 */
 
 /*!
   Constructs the ticker and sets reasonable default values. Axis tickers are commonly created
   managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.
 */
 QCPAxisTickerFixed::QCPAxisTickerFixed() : mTickStep(1.0), mScaleStrategy(ssNone)
 {
 }
 
 /*!
   Sets the fixed tick interval to \a step.
 
   The axis ticker will only use this tick step when generating axis ticks. This might cause a very
   high tick density and overlapping labels if the axis range is zoomed out. Using \ref
   setScaleStrategy it is possible to relax the fixed step and also allow multiples or powers of \a
   step. This will enable the ticker to reduce the number of ticks to a reasonable amount (see \ref
   setTickCount).
 */
 void QCPAxisTickerFixed::setTickStep(double step)
 {
     if (step > 0)
         mTickStep = step;
     else
         qDebug() << Q_FUNC_INFO << "tick step must be greater than zero:" << step;
 }
 
 /*!
   Sets whether the specified tick step (\ref setTickStep) is absolutely fixed or whether
   modifications may be applied to it before calculating the finally used tick step, such as
   permitting multiples or powers. See \ref ScaleStrategy for details.
 
   The default strategy is \ref ssNone, which means the tick step is absolutely fixed.
 */
 void QCPAxisTickerFixed::setScaleStrategy(QCPAxisTickerFixed::ScaleStrategy strategy)
 {
     mScaleStrategy = strategy;
 }
 
 /*! \internal
 
   Determines the actually used tick step from the specified tick step and scale strategy (\ref
   setTickStep, \ref setScaleStrategy).
 
   This method either returns the specified tick step exactly, or, if the scale strategy is not \ref
   ssNone, a modification of it to allow varying the number of ticks in the current axis range.
 
   \seebaseclassmethod
 */
 double QCPAxisTickerFixed::getTickStep(const QCPRange &range)
 {
     switch (mScaleStrategy)
     {
         case ssNone:
         {
             return mTickStep;
         }
         case ssMultiples:
         {
             double exactStep =
                 range.size() /
                 (double)(mTickCount +
                          1e-10); // mTickCount ticks on average, the small addition is to prevent jitter on exact integers
             if (exactStep < mTickStep)
                 return mTickStep;
             else
                 return (qint64)(cleanMantissa(exactStep / mTickStep) + 0.5) * mTickStep;
         }
         case ssPowers:
         {
             double exactStep =
                 range.size() /
                 (double)(mTickCount +
                          1e-10); // mTickCount ticks on average, the small addition is to prevent jitter on exact integers
             return qPow(mTickStep, (int)(qLn(exactStep) / qLn(mTickStep) + 0.5));
         }
     }
     return mTickStep;
 }
 /* end of 'src/axis/axistickerfixed.cpp' */
 
 /* including file 'src/axis/axistickertext.cpp', size 8653                   */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisTickerText
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPAxisTickerText
   \brief Specialized axis ticker which allows arbitrary labels at specified coordinates
 
   \image html axisticker-text.png
 
   This QCPAxisTicker subclass generates ticks which can be directly specified by the user as
   coordinates and associated strings. They can be passed as a whole with \ref setTicks or one at a
   time with \ref addTick. Alternatively you can directly access the internal storage via \ref ticks
   and modify the tick/label data there.
 
   This is useful for cases where the axis represents categories rather than numerical values.
 
   If you are updating the ticks of this ticker regularly and in a dynamic fasion (e.g. dependent on
   the axis range), it is a sign that you should probably create an own ticker by subclassing
   QCPAxisTicker, instead of using this one.
 
   The ticker can be created and assigned to an axis like this:
   \snippet documentation/doc-image-generator/mainwindow.cpp axistickertext-creation
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QMap<double, QString> &QCPAxisTickerText::ticks()
 
   Returns a non-const reference to the internal map which stores the tick coordinates and their
   labels.
 
   You can access the map directly in order to add, remove or manipulate ticks, as an alternative to
   using the methods provided by QCPAxisTickerText, such as \ref setTicks and \ref addTick.
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs the ticker and sets reasonable default values. Axis tickers are commonly created
   managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.
 */
 QCPAxisTickerText::QCPAxisTickerText() : mSubTickCount(0)
 {
 }
 
 /*! \overload
 
   Sets the ticks that shall appear on the axis. The map key of \a ticks corresponds to the axis
   coordinate, and the map value is the string that will appear as tick label.
 
   An alternative to manipulate ticks is to directly access the internal storage with the \ref ticks
   getter.
 
   \see addTicks, addTick, clear
 */
 void QCPAxisTickerText::setTicks(const QMap<double, QString> &ticks)
 {
     mTicks = ticks;
 }
 
 /*! \overload
 
   Sets the ticks that shall appear on the axis. The entries of \a positions correspond to the axis
   coordinates, and the entries of \a labels are the respective strings that will appear as tick
   labels.
 
   \see addTicks, addTick, clear
 */
 void QCPAxisTickerText::setTicks(const QVector<double> &positions, const QVector<QString> labels)
 {
     clear();
     addTicks(positions, labels);
 }
 
 /*!
   Sets the number of sub ticks that shall appear between ticks. For QCPAxisTickerText, there is no
   automatic sub tick count calculation. So if sub ticks are needed, they must be configured with this
   method.
 */
 void QCPAxisTickerText::setSubTickCount(int subTicks)
 {
     if (subTicks >= 0)
         mSubTickCount = subTicks;
     else
         qDebug() << Q_FUNC_INFO << "sub tick count can't be negative:" << subTicks;
 }
 
 /*!
   Clears all ticks.
 
   An alternative to manipulate ticks is to directly access the internal storage with the \ref ticks
   getter.
 
   \see setTicks, addTicks, addTick
 */
 void QCPAxisTickerText::clear()
 {
     mTicks.clear();
 }
 
 /*!
   Adds a single tick to the axis at the given axis coordinate \a position, with the provided tick \a
   label.
 
   \see addTicks, setTicks, clear
 */
 void QCPAxisTickerText::addTick(double position, QString label)
 {
     mTicks.insert(position, label);
 }
 
 /*! \overload
 
   Adds the provided \a ticks to the ones already existing. The map key of \a ticks corresponds to
   the axis coordinate, and the map value is the string that will appear as tick label.
 
   An alternative to manipulate ticks is to directly access the internal storage with the \ref ticks
   getter.
 
   \see addTick, setTicks, clear
 */
 void QCPAxisTickerText::addTicks(const QMap<double, QString> &ticks)
 {
     mTicks.unite(ticks);
 }
 
 /*! \overload
 
   Adds the provided ticks to the ones already existing. The entries of \a positions correspond to
   the axis coordinates, and the entries of \a labels are the respective strings that will appear as
   tick labels.
 
   An alternative to manipulate ticks is to directly access the internal storage with the \ref ticks
   getter.
 
   \see addTick, setTicks, clear
 */
 void QCPAxisTickerText::addTicks(const QVector<double> &positions, const QVector<QString> &labels)
 {
     if (positions.size() != labels.size())
         qDebug() << Q_FUNC_INFO << "passed unequal length vectors for positions and labels:" << positions.size()
                  << labels.size();
     int n = qMin(positions.size(), labels.size());
     for (int i = 0; i < n; ++i)
         mTicks.insert(positions.at(i), labels.at(i));
 }
 
 /*!
   Since the tick coordinates are provided externally, this method implementation does nothing.
 
   \seebaseclassmethod
 */
 double QCPAxisTickerText::getTickStep(const QCPRange &range)
 {
     // text axis ticker has manual tick positions, so doesn't need this method
     Q_UNUSED(range)
     return 1.0;
 }
 
 /*!
   Returns the sub tick count that was configured with \ref setSubTickCount.
 
   \seebaseclassmethod
 */
 int QCPAxisTickerText::getSubTickCount(double tickStep)
 {
     Q_UNUSED(tickStep)
     return mSubTickCount;
 }
 
 /*!
   Returns the tick label which corresponds to the key \a tick in the internal tick storage. Since
   the labels are provided externally, \a locale, \a formatChar, and \a precision are ignored.
 
   \seebaseclassmethod
 */
 QString QCPAxisTickerText::getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision)
 {
     Q_UNUSED(locale)
     Q_UNUSED(formatChar)
     Q_UNUSED(precision)
     return mTicks.value(tick);
 }
 
 /*!
   Returns the externally provided tick coordinates which are in the specified \a range. If
   available, one tick above and below the range is provided in addition, to allow possible sub tick
   calculation. The parameter \a tickStep is ignored.
 
   \seebaseclassmethod
 */
 QVector<double> QCPAxisTickerText::createTickVector(double tickStep, const QCPRange &range)
 {
     Q_UNUSED(tickStep)
     QVector<double> result;
     if (mTicks.isEmpty())
         return result;
 
     const QMap<double, QString> constTicks(mTicks);
     QMap<double, QString>::const_iterator start = constTicks.lowerBound(range.lower);
     QMap<double, QString>::const_iterator end   = constTicks.upperBound(range.upper);
     // this method should try to give one tick outside of range so proper subticks can be generated:
     if (start != mTicks.constBegin())
         --start;
     if (end != mTicks.constEnd())
         ++end;
     for (QMap<double, QString>::const_iterator it = start; it != end; ++it)
         result.append(it.key());
 
     return result;
 }
 /* end of 'src/axis/axistickertext.cpp' */
 
 /* including file 'src/axis/axistickerpi.cpp', size 11170                    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisTickerPi
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPAxisTickerPi
   \brief Specialized axis ticker to display ticks in units of an arbitrary constant, for example pi
 
   \image html axisticker-pi.png
 
   This QCPAxisTicker subclass generates ticks that are expressed with respect to a given symbolic
   constant with a numerical value specified with \ref setPiValue and an appearance in the tick
   labels specified with \ref setPiSymbol.
 
   Ticks may be generated at fractions of the symbolic constant. How these fractions appear in the
   tick label can be configured with \ref setFractionStyle.
 
   The ticker can be created and assigned to an axis like this:
   \snippet documentation/doc-image-generator/mainwindow.cpp axistickerpi-creation
 */
 
 /*!
   Constructs the ticker and sets reasonable default values. Axis tickers are commonly created
   managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.
 */
 QCPAxisTickerPi::QCPAxisTickerPi()
     : mPiSymbol(QLatin1String(" ") + QChar(0x03C0)), mPiValue(M_PI), mPeriodicity(0),
       mFractionStyle(fsUnicodeFractions), mPiTickStep(0)
 {
     setTickCount(4);
 }
 
 /*!
   Sets how the symbol part (which is always a suffix to the number) shall appear in the axis tick
   label.
 
   If a space shall appear between the number and the symbol, make sure the space is contained in \a
   symbol.
 */
 void QCPAxisTickerPi::setPiSymbol(QString symbol)
 {
     mPiSymbol = symbol;
 }
 
 /*!
   Sets the numerical value that the symbolic constant has.
 
   This will be used to place the appropriate fractions of the symbol at the respective axis
   coordinates.
 */
 void QCPAxisTickerPi::setPiValue(double pi)
 {
     mPiValue = pi;
 }
 
 /*!
   Sets whether the axis labels shall appear periodicly and if so, at which multiplicity of the
   symbolic constant.
 
   To disable periodicity, set \a multiplesOfPi to zero.
 
   For example, an axis that identifies 0 with 2pi would set \a multiplesOfPi to two.
 */
 void QCPAxisTickerPi::setPeriodicity(int multiplesOfPi)
 {
     mPeriodicity = qAbs(multiplesOfPi);
 }
 
 /*!
   Sets how the numerical/fractional part preceding the symbolic constant is displayed in tick
   labels. See \ref FractionStyle for the various options.
 */
 void QCPAxisTickerPi::setFractionStyle(QCPAxisTickerPi::FractionStyle style)
 {
     mFractionStyle = style;
 }
 
 /*! \internal
 
   Returns the tick step, using the constant's value (\ref setPiValue) as base unit. In consequence
   the numerical/fractional part preceding the symbolic constant is made to have a readable
   mantissa.
 
   \seebaseclassmethod
 */
 double QCPAxisTickerPi::getTickStep(const QCPRange &range)
 {
     mPiTickStep =
         range.size() / mPiValue /
         (double)(mTickCount +
                  1e-10); // mTickCount ticks on average, the small addition is to prevent jitter on exact integers
     mPiTickStep = cleanMantissa(mPiTickStep);
     return mPiTickStep * mPiValue;
 }
 
 /*! \internal
 
   Returns the sub tick count, using the constant's value (\ref setPiValue) as base unit. In
   consequence the sub ticks divide the numerical/fractional part preceding the symbolic constant
   reasonably, and not the total tick coordinate.
 
   \seebaseclassmethod
 */
 int QCPAxisTickerPi::getSubTickCount(double tickStep)
 {
     return QCPAxisTicker::getSubTickCount(tickStep / mPiValue);
 }
 
 /*! \internal
 
   Returns the tick label as a fractional/numerical part and a symbolic string as suffix. The
   formatting of the fraction is done according to the specified \ref setFractionStyle. The appended
   symbol is specified with \ref setPiSymbol.
 
   \seebaseclassmethod
 */
 QString QCPAxisTickerPi::getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision)
 {
     double tickInPis = tick / mPiValue;
     if (mPeriodicity > 0)
         tickInPis = fmod(tickInPis, mPeriodicity);
 
     if (mFractionStyle != fsFloatingPoint && mPiTickStep > 0.09 && mPiTickStep < 50)
     {
         // simply construct fraction from decimal like 1.234 -> 1234/1000 and then simplify fraction, smaller digits are irrelevant due to mPiTickStep conditional above
         int denominator = 1000;
         int numerator   = qRound(tickInPis * denominator);
         simplifyFraction(numerator, denominator);
         if (qAbs(numerator) == 1 && denominator == 1)
             return (numerator < 0 ? QLatin1String("-") : QLatin1String("")) + mPiSymbol.trimmed();
         else if (numerator == 0)
             return QLatin1String("0");
         else
             return fractionToString(numerator, denominator) + mPiSymbol;
     }
     else
     {
         if (qFuzzyIsNull(tickInPis))
             return QLatin1String("0");
         else if (qFuzzyCompare(qAbs(tickInPis), 1.0))
             return (tickInPis < 0 ? QLatin1String("-") : QLatin1String("")) + mPiSymbol.trimmed();
         else
             return QCPAxisTicker::getTickLabel(tickInPis, locale, formatChar, precision) + mPiSymbol;
     }
 }
 
 /*! \internal
 
   Takes the fraction given by \a numerator and \a denominator and modifies the values to make sure
   the fraction is in irreducible form, i.e. numerator and denominator don't share any common
   factors which could be cancelled.
 */
 void QCPAxisTickerPi::simplifyFraction(int &numerator, int &denominator) const
 {
     if (numerator == 0 || denominator == 0)
         return;
 
     int num   = numerator;
     int denom = denominator;
     while (denom != 0) // euclidean gcd algorithm
     {
         int oldDenom = denom;
         denom        = num % denom;
         num          = oldDenom;
     }
     // num is now gcd of numerator and denominator
     numerator /= num;
     denominator /= num;
 }
 
 /*! \internal
 
   Takes the fraction given by \a numerator and \a denominator and returns a string representation.
   The result depends on the configured fraction style (\ref setFractionStyle).
 
   This method is used to format the numerical/fractional part when generating tick labels. It
   simplifies the passed fraction to an irreducible form using \ref simplifyFraction and factors out
   any integer parts of the fraction (e.g. "10/4" becomes "2 1/2").
 */
 QString QCPAxisTickerPi::fractionToString(int numerator, int denominator) const
 {
     if (denominator == 0)
     {
         qDebug() << Q_FUNC_INFO << "called with zero denominator";
         return QString();
     }
     if (mFractionStyle == fsFloatingPoint) // should never be the case when calling this function
     {
         qDebug() << Q_FUNC_INFO << "shouldn't be called with fraction style fsDecimal";
         return QString::number(numerator / (double)denominator); // failsafe
     }
     int sign    = numerator * denominator < 0 ? -1 : 1;
     numerator   = qAbs(numerator);
     denominator = qAbs(denominator);
 
     if (denominator == 1)
     {
         return QString::number(sign * numerator);
     }
     else
     {
         int integerPart = numerator / denominator;
         int remainder   = numerator % denominator;
         if (remainder == 0)
         {
             return QString::number(sign * integerPart);
         }
         else
         {
             if (mFractionStyle == fsAsciiFractions)
             {
                 return QString(QLatin1String("%1%2%3/%4"))
                     .arg(sign == -1 ? QLatin1String("-") : QLatin1String(""))
                     .arg(integerPart > 0 ? (QString::number(integerPart) + QLatin1String(" ")) : QString(""))
                     .arg(remainder)
                     .arg(denominator);
             }
             else if (mFractionStyle == fsUnicodeFractions)
             {
                 return QString(QLatin1String("%1%2%3"))
                     .arg(sign == -1 ? QLatin1String("-") : QLatin1String(""))
                     .arg(integerPart > 0 ? QString::number(integerPart) : QLatin1String(""))
                     .arg(unicodeFraction(remainder, denominator));
             }
         }
     }
     return QString();
 }
 
 /*! \internal
 
   Returns the unicode string representation of the fraction given by \a numerator and \a
   denominator. This is the representation used in \ref fractionToString when the fraction style
   (\ref setFractionStyle) is \ref fsUnicodeFractions.
 
   This method doesn't use the single-character common fractions but builds each fraction from a
   superscript unicode number, the unicode fraction character, and a subscript unicode number.
 */
 QString QCPAxisTickerPi::unicodeFraction(int numerator, int denominator) const
 {
     return unicodeSuperscript(numerator) + QChar(0x2044) + unicodeSubscript(denominator);
 }
 
 /*! \internal
 
   Returns the unicode string representing \a number as superscript. This is used to build
   unicode fractions in \ref unicodeFraction.
 */
 QString QCPAxisTickerPi::unicodeSuperscript(int number) const
 {
     if (number == 0)
         return QString(QChar(0x2070));
 
     QString result;
     while (number > 0)
     {
         const int digit = number % 10;
         switch (digit)
         {
             case 1:
             {
                 result.prepend(QChar(0x00B9));
                 break;
             }
             case 2:
             {
                 result.prepend(QChar(0x00B2));
                 break;
             }
             case 3:
             {
                 result.prepend(QChar(0x00B3));
                 break;
             }
             default:
             {
                 result.prepend(QChar(0x2070 + digit));
                 break;
             }
         }
         number /= 10;
     }
     return result;
 }
 
 /*! \internal
 
   Returns the unicode string representing \a number as subscript. This is used to build unicode
   fractions in \ref unicodeFraction.
 */
 QString QCPAxisTickerPi::unicodeSubscript(int number) const
 {
     if (number == 0)
         return QString(QChar(0x2080));
 
     QString result;
     while (number > 0)
     {
         result.prepend(QChar(0x2080 + number % 10));
         number /= 10;
     }
     return result;
 }
 /* end of 'src/axis/axistickerpi.cpp' */
 
 /* including file 'src/axis/axistickerlog.cpp', size 7106                    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisTickerLog
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 /*! \class QCPAxisTickerLog
   \brief Specialized axis ticker suited for logarithmic axes
 
   \image html axisticker-log.png
 
   This QCPAxisTicker subclass generates ticks with unequal tick intervals suited for logarithmic
   axis scales. The ticks are placed at powers of the specified log base (\ref setLogBase).
 
   Especially in the case of a log base equal to 10 (the default), it might be desirable to have
   tick labels in the form of powers of ten without mantissa display. To achieve this, set the
   number precision (\ref QCPAxis::setNumberPrecision) to zero and the number format (\ref
   QCPAxis::setNumberFormat) to scientific (exponential) display with beautifully typeset decimal
   powers, so a format string of <tt>"eb"</tt>. This will result in the following axis tick labels:
 
   \image html axisticker-log-powers.png
 
   The ticker can be created and assigned to an axis like this:
   \snippet documentation/doc-image-generator/mainwindow.cpp axistickerlog-creation
 */
 
 /*!
   Constructs the ticker and sets reasonable default values. Axis tickers are commonly created
   managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.
 */
 QCPAxisTickerLog::QCPAxisTickerLog()
     : mLogBase(10.0), mSubTickCount(8), // generates 10 intervals
       mLogBaseLnInv(1.0 / qLn(mLogBase))
 {
 }
 
 /*!
   Sets the logarithm base used for tick coordinate generation. The ticks will be placed at integer
   powers of \a base.
 */
 void QCPAxisTickerLog::setLogBase(double base)
 {
     if (base > 0)
     {
         mLogBase      = base;
         mLogBaseLnInv = 1.0 / qLn(mLogBase);
     }
     else
         qDebug() << Q_FUNC_INFO << "log base has to be greater than zero:" << base;
 }
 
 /*!
   Sets the number of sub ticks in a tick interval. Within each interval, the sub ticks are spaced
   linearly to provide a better visual guide, so the sub tick density increases toward the higher
   tick.
 
   Note that \a subTicks is the number of sub ticks (not sub intervals) in one tick interval. So in
   the case of logarithm base 10 an intuitive sub tick spacing would be achieved with eight sub
   ticks (the default). This means e.g. between the ticks 10 and 100 there will be eight ticks,
   namely at 20, 30, 40, 50, 60, 70, 80 and 90.
 */
 void QCPAxisTickerLog::setSubTickCount(int subTicks)
 {
     if (subTicks >= 0)
         mSubTickCount = subTicks;
     else
         qDebug() << Q_FUNC_INFO << "sub tick count can't be negative:" << subTicks;
 }
 
 /*! \internal
 
   Since logarithmic tick steps are necessarily different for each tick interval, this method does
   nothing in the case of QCPAxisTickerLog
 
   \seebaseclassmethod
 */
 double QCPAxisTickerLog::getTickStep(const QCPRange &range)
 {
     // Logarithmic axis ticker has unequal tick spacing, so doesn't need this method
     Q_UNUSED(range)
     return 1.0;
 }
 
 /*! \internal
 
   Returns the sub tick count specified in \ref setSubTickCount. For QCPAxisTickerLog, there is no
   automatic sub tick count calculation necessary.
 
   \seebaseclassmethod
 */
 int QCPAxisTickerLog::getSubTickCount(double tickStep)
 {
     Q_UNUSED(tickStep)
     return mSubTickCount;
 }
 
 /*! \internal
 
   Creates ticks with a spacing given by the logarithm base and an increasing integer power in the
   provided \a range. The step in which the power increases tick by tick is chosen in order to keep
   the total number of ticks as close as possible to the tick count (\ref setTickCount). The
   parameter \a tickStep is ignored for QCPAxisTickerLog
 
   \seebaseclassmethod
 */
 QVector<double> QCPAxisTickerLog::createTickVector(double tickStep, const QCPRange &range)
 {
     Q_UNUSED(tickStep)
     QVector<double> result;
     if (range.lower > 0 && range.upper > 0) // positive range
     {
         double exactPowerStep = qLn(range.upper / range.lower) * mLogBaseLnInv / (double)(mTickCount + 1e-10);
         double newLogBase     = qPow(mLogBase, qMax((int)cleanMantissa(exactPowerStep), 1));
         double currentTick    = qPow(newLogBase, qFloor(qLn(range.lower) / qLn(newLogBase)));
         result.append(currentTick);
         while (currentTick < range.upper &&
                currentTick > 0) // currentMag might be zero for ranges ~1e-300, just cancel in that case
         {
             currentTick *= newLogBase;
             result.append(currentTick);
         }
     }
     else if (range.lower < 0 && range.upper < 0) // negative range
     {
         double exactPowerStep = qLn(range.lower / range.upper) * mLogBaseLnInv / (double)(mTickCount + 1e-10);
         double newLogBase     = qPow(mLogBase, qMax((int)cleanMantissa(exactPowerStep), 1));
         double currentTick    = -qPow(newLogBase, qCeil(qLn(-range.lower) / qLn(newLogBase)));
         result.append(currentTick);
         while (currentTick < range.upper &&
                currentTick < 0) // currentMag might be zero for ranges ~1e-300, just cancel in that case
         {
             currentTick /= newLogBase;
             result.append(currentTick);
         }
     }
     else // invalid range for logarithmic scale, because lower and upper have different sign
     {
         qDebug() << Q_FUNC_INFO << "Invalid range for logarithmic plot: " << range.lower << ".." << range.upper;
     }
 
     return result;
 }
 /* end of 'src/axis/axistickerlog.cpp' */
 
 /* including file 'src/axis/axis.cpp', size 94458                            */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPGrid
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPGrid
   \brief Responsible for drawing the grid of a QCPAxis.
 
   This class is tightly bound to QCPAxis. Every axis owns a grid instance and uses it to draw the
   grid lines, sub grid lines and zero-line. You can interact with the grid of an axis via \ref
   QCPAxis::grid. Normally, you don't need to create an instance of QCPGrid yourself.
 
   The axis and grid drawing was split into two classes to allow them to be placed on different
   layers (both QCPAxis and QCPGrid inherit from QCPLayerable). Thus it is possible to have the grid
   in the background and the axes in the foreground, and any plottables/items in between. This
   described situation is the default setup, see the QCPLayer documentation.
 */
 
 /*!
   Creates a QCPGrid instance and sets default values.
 
   You shouldn't instantiate grids on their own, since every QCPAxis brings its own QCPGrid.
 */
 QCPGrid::QCPGrid(QCPAxis *parentAxis)
     : QCPLayerable(parentAxis->parentPlot(), QString(), parentAxis), mParentAxis(parentAxis)
 {
     // warning: this is called in QCPAxis constructor, so parentAxis members should not be accessed/called
     setParent(parentAxis);
     setPen(QPen(QColor(200, 200, 200), 0, Qt::DotLine));
     setSubGridPen(QPen(QColor(220, 220, 220), 0, Qt::DotLine));
     setZeroLinePen(QPen(QColor(200, 200, 200), 0, Qt::SolidLine));
     setSubGridVisible(false);
     setAntialiased(false);
     setAntialiasedSubGrid(false);
     setAntialiasedZeroLine(false);
 }
 
 /*!
   Sets whether grid lines at sub tick marks are drawn.
 
   \see setSubGridPen
 */
 void QCPGrid::setSubGridVisible(bool visible)
 {
     mSubGridVisible = visible;
 }
 
 /*!
   Sets whether sub grid lines are drawn antialiased.
 */
 void QCPGrid::setAntialiasedSubGrid(bool enabled)
 {
     mAntialiasedSubGrid = enabled;
 }
 
 /*!
   Sets whether zero lines are drawn antialiased.
 */
 void QCPGrid::setAntialiasedZeroLine(bool enabled)
 {
     mAntialiasedZeroLine = enabled;
 }
 
 /*!
   Sets the pen with which (major) grid lines are drawn.
 */
 void QCPGrid::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen with which sub grid lines are drawn.
 */
 void QCPGrid::setSubGridPen(const QPen &pen)
 {
     mSubGridPen = pen;
 }
 
 /*!
   Sets the pen with which zero lines are drawn.
 
   Zero lines are lines at value coordinate 0 which may be drawn with a different pen than other grid
   lines. To disable zero lines and just draw normal grid lines at zero, set \a pen to Qt::NoPen.
 */
 void QCPGrid::setZeroLinePen(const QPen &pen)
 {
     mZeroLinePen = pen;
 }
 
 /*! \internal
 
   A convenience function to easily set the QPainter::Antialiased hint on the provided \a painter
   before drawing the major grid lines.
 
   This is the antialiasing state the painter passed to the \ref draw method is in by default.
 
   This function takes into account the local setting of the antialiasing flag as well as the
   overrides set with \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 
   \see setAntialiased
 */
 void QCPGrid::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aeGrid);
 }
 
 /*! \internal
 
   Draws grid lines and sub grid lines at the positions of (sub) ticks of the parent axis, spanning
   over the complete axis rect. Also draws the zero line, if appropriate (\ref setZeroLinePen).
 */
 void QCPGrid::draw(QCPPainter *painter)
 {
     if (!mParentAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid parent axis";
         return;
     }
 
     if (mParentAxis->subTicks() && mSubGridVisible)
         drawSubGridLines(painter);
     drawGridLines(painter);
 }
 
 /*! \internal
 
   Draws the main grid lines and possibly a zero line with the specified painter.
 
   This is a helper function called by \ref draw.
 */
 void QCPGrid::drawGridLines(QCPPainter *painter) const
 {
     if (!mParentAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid parent axis";
         return;
     }
 
     const int tickCount = mParentAxis->mTickVector.size();
     double t; // helper variable, result of coordinate-to-pixel transforms
     if (mParentAxis->orientation() == Qt::Horizontal)
     {
         // draw zeroline:
         int zeroLineIndex = -1;
         if (mZeroLinePen.style() != Qt::NoPen && mParentAxis->mRange.lower < 0 && mParentAxis->mRange.upper > 0)
         {
             applyAntialiasingHint(painter, mAntialiasedZeroLine, QCP::aeZeroLine);
             painter->setPen(mZeroLinePen);
             double epsilon = mParentAxis->range().size() * 1E-6; // for comparing double to zero
             for (int i = 0; i < tickCount; ++i)
             {
                 if (qAbs(mParentAxis->mTickVector.at(i)) < epsilon)
                 {
                     zeroLineIndex = i;
                     t             = mParentAxis->coordToPixel(mParentAxis->mTickVector.at(i)); // x
                     painter->drawLine(QLineF(t, mParentAxis->mAxisRect->bottom(), t, mParentAxis->mAxisRect->top()));
                     break;
                 }
             }
         }
         // draw grid lines:
         applyDefaultAntialiasingHint(painter);
         painter->setPen(mPen);
         for (int i = 0; i < tickCount; ++i)
         {
             if (i == zeroLineIndex)
                 continue; // don't draw a gridline on top of the zeroline
             t = mParentAxis->coordToPixel(mParentAxis->mTickVector.at(i)); // x
             painter->drawLine(QLineF(t, mParentAxis->mAxisRect->bottom(), t, mParentAxis->mAxisRect->top()));
         }
     }
     else
     {
         // draw zeroline:
         int zeroLineIndex = -1;
         if (mZeroLinePen.style() != Qt::NoPen && mParentAxis->mRange.lower < 0 && mParentAxis->mRange.upper > 0)
         {
             applyAntialiasingHint(painter, mAntialiasedZeroLine, QCP::aeZeroLine);
             painter->setPen(mZeroLinePen);
             double epsilon = mParentAxis->mRange.size() * 1E-6; // for comparing double to zero
             for (int i = 0; i < tickCount; ++i)
             {
                 if (qAbs(mParentAxis->mTickVector.at(i)) < epsilon)
                 {
                     zeroLineIndex = i;
                     t             = mParentAxis->coordToPixel(mParentAxis->mTickVector.at(i)); // y
                     painter->drawLine(QLineF(mParentAxis->mAxisRect->left(), t, mParentAxis->mAxisRect->right(), t));
                     break;
                 }
             }
         }
         // draw grid lines:
         applyDefaultAntialiasingHint(painter);
         painter->setPen(mPen);
         for (int i = 0; i < tickCount; ++i)
         {
             if (i == zeroLineIndex)
                 continue; // don't draw a gridline on top of the zeroline
             t = mParentAxis->coordToPixel(mParentAxis->mTickVector.at(i)); // y
             painter->drawLine(QLineF(mParentAxis->mAxisRect->left(), t, mParentAxis->mAxisRect->right(), t));
         }
     }
 }
 
 /*! \internal
 
   Draws the sub grid lines with the specified painter.
 
   This is a helper function called by \ref draw.
 */
 void QCPGrid::drawSubGridLines(QCPPainter *painter) const
 {
     if (!mParentAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid parent axis";
         return;
     }
 
     applyAntialiasingHint(painter, mAntialiasedSubGrid, QCP::aeSubGrid);
     double t; // helper variable, result of coordinate-to-pixel transforms
     painter->setPen(mSubGridPen);
     if (mParentAxis->orientation() == Qt::Horizontal)
     {
         for (int i = 0; i < mParentAxis->mSubTickVector.size(); ++i)
         {
             t = mParentAxis->coordToPixel(mParentAxis->mSubTickVector.at(i)); // x
             painter->drawLine(QLineF(t, mParentAxis->mAxisRect->bottom(), t, mParentAxis->mAxisRect->top()));
         }
     }
     else
     {
         for (int i = 0; i < mParentAxis->mSubTickVector.size(); ++i)
         {
             t = mParentAxis->coordToPixel(mParentAxis->mSubTickVector.at(i)); // y
             painter->drawLine(QLineF(mParentAxis->mAxisRect->left(), t, mParentAxis->mAxisRect->right(), t));
         }
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxis
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAxis
   \brief Manages a single axis inside a QCustomPlot.
 
   Usually doesn't need to be instantiated externally. Access %QCustomPlot's default four axes via
   QCustomPlot::xAxis (bottom), QCustomPlot::yAxis (left), QCustomPlot::xAxis2 (top) and
   QCustomPlot::yAxis2 (right).
 
   Axes are always part of an axis rect, see QCPAxisRect.
   \image html AxisNamesOverview.png
   <center>Naming convention of axis parts</center>
   \n
 
   \image html AxisRectSpacingOverview.png
   <center>Overview of the spacings and paddings that define the geometry of an axis. The dashed gray line
   on the left represents the QCustomPlot widget border.</center>
 
   Each axis holds an instance of QCPAxisTicker which is used to generate the tick coordinates and
   tick labels. You can access the currently installed \ref ticker or set a new one (possibly one of
   the specialized subclasses, or your own subclass) via \ref setTicker. For details, see the
   documentation of QCPAxisTicker.
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn Qt::Orientation QCPAxis::orientation() const
 
   Returns the orientation of this axis. The axis orientation (horizontal or vertical) is deduced
   from the axis type (left, top, right or bottom).
 
   \see orientation(AxisType type), pixelOrientation
 */
 
 /*! \fn QCPGrid *QCPAxis::grid() const
 
   Returns the \ref QCPGrid instance belonging to this axis. Access it to set details about the way the
   grid is displayed.
 */
 
 /*! \fn static Qt::Orientation QCPAxis::orientation(AxisType type)
 
   Returns the orientation of the specified axis type
 
   \see orientation(), pixelOrientation
 */
 
 /*! \fn int QCPAxis::pixelOrientation() const
 
   Returns which direction points towards higher coordinate values/keys, in pixel space.
 
   This method returns either 1 or -1. If it returns 1, then going in the positive direction along
   the orientation of the axis in pixels corresponds to going from lower to higher axis coordinates.
   On the other hand, if this method returns -1, going to smaller pixel values corresponds to going
   from lower to higher axis coordinates.
 
   For example, this is useful to easily shift axis coordinates by a certain amount given in pixels,
   without having to care about reversed or vertically aligned axes:
 
   \code
   double newKey = keyAxis->pixelToCoord(keyAxis->coordToPixel(oldKey)+10*keyAxis->pixelOrientation());
   \endcode
 
   \a newKey will then contain a key that is ten pixels towards higher keys, starting from \a oldKey.
 */
 
 /*! \fn QSharedPointer<QCPAxisTicker> QCPAxis::ticker() const
 
   Returns a modifiable shared pointer to the currently installed axis ticker. The axis ticker is
   responsible for generating the tick positions and tick labels of this axis. You can access the
   \ref QCPAxisTicker with this method and modify basic properties such as the approximate tick count
   (\ref QCPAxisTicker::setTickCount).
 
   You can gain more control over the axis ticks by setting a different \ref QCPAxisTicker subclass, see
   the documentation there. A new axis ticker can be set with \ref setTicker.
 
   Since the ticker is stored in the axis as a shared pointer, multiple axes may share the same axis
   ticker simply by passing the same shared pointer to multiple axes.
 
   \see setTicker
 */
 
 /* end of documentation of inline functions */
 /* start of documentation of signals */
 
 /*! \fn void QCPAxis::rangeChanged(const QCPRange &newRange)
 
   This signal is emitted when the range of this axis has changed. You can connect it to the \ref
   setRange slot of another axis to communicate the new range to the other axis, in order for it to
   be synchronized.
 
   You may also manipulate/correct the range with \ref setRange in a slot connected to this signal.
   This is useful if for example a maximum range span shall not be exceeded, or if the lower/upper
   range shouldn't go beyond certain values (see \ref QCPRange::bounded). For example, the following
   slot would limit the x axis to ranges between 0 and 10:
   \code
   customPlot->xAxis->setRange(newRange.bounded(0, 10))
   \endcode
 */
 
 /*! \fn void QCPAxis::rangeChanged(const QCPRange &newRange, const QCPRange &oldRange)
   \overload
 
   Additionally to the new range, this signal also provides the previous range held by the axis as
   \a oldRange.
 */
 
 /*! \fn void QCPAxis::scaleTypeChanged(QCPAxis::ScaleType scaleType);
 
   This signal is emitted when the scale type changes, by calls to \ref setScaleType
 */
 
 /*! \fn void QCPAxis::selectionChanged(QCPAxis::SelectableParts selection)
 
   This signal is emitted when the selection state of this axis has changed, either by user interaction
   or by a direct call to \ref setSelectedParts.
 */
 
 /*! \fn void QCPAxis::selectableChanged(const QCPAxis::SelectableParts &parts);
 
   This signal is emitted when the selectability changes, by calls to \ref setSelectableParts
 */
 
 /* end of documentation of signals */
 
 /*!
   Constructs an Axis instance of Type \a type for the axis rect \a parent.
 
   Usually it isn't necessary to instantiate axes directly, because you can let QCustomPlot create
   them for you with \ref QCPAxisRect::addAxis. If you want to use own QCPAxis-subclasses however,
   create them manually and then inject them also via \ref QCPAxisRect::addAxis.
 */
 QCPAxis::QCPAxis(QCPAxisRect *parent, AxisType type)
     : QCPLayerable(parent->parentPlot(), QString(), parent),
       // axis base:
       mAxisType(type), mAxisRect(parent), mPadding(5), mOrientation(orientation(type)),
       mSelectableParts(spAxis | spTickLabels | spAxisLabel), mSelectedParts(spNone),
       mBasePen(QPen(Qt::black, 0, Qt::SolidLine, Qt::SquareCap)), mSelectedBasePen(QPen(Qt::blue, 2)),
       // axis label:
       mLabel(), mLabelFont(mParentPlot->font()),
       mSelectedLabelFont(QFont(mLabelFont.family(), mLabelFont.pointSize(), QFont::Bold)), mLabelColor(Qt::black),
       mSelectedLabelColor(Qt::blue),
       // tick labels:
       mTickLabels(true), mTickLabelFont(mParentPlot->font()),
       mSelectedTickLabelFont(QFont(mTickLabelFont.family(), mTickLabelFont.pointSize(), QFont::Bold)),
       mTickLabelColor(Qt::black), mSelectedTickLabelColor(Qt::blue), mNumberPrecision(6), mNumberFormatChar('g'),
       mNumberBeautifulPowers(true),
       // ticks and subticks:
       mTicks(true), mSubTicks(true), mTickPen(QPen(Qt::black, 0, Qt::SolidLine, Qt::SquareCap)),
       mSelectedTickPen(QPen(Qt::blue, 2)), mSubTickPen(QPen(Qt::black, 0, Qt::SolidLine, Qt::SquareCap)),
       mSelectedSubTickPen(QPen(Qt::blue, 2)),
       // scale and range:
       mRange(0, 5), mRangeReversed(false), mScaleType(stLinear),
       // internal members:
       mGrid(new QCPGrid(this)), mAxisPainter(new QCPAxisPainterPrivate(parent->parentPlot())),
       mTicker(new QCPAxisTicker), mCachedMarginValid(false), mCachedMargin(0)
 {
     setParent(parent);
     mGrid->setVisible(false);
     setAntialiased(false);
     setLayer(
         mParentPlot
             ->currentLayer()); // it's actually on that layer already, but we want it in front of the grid, so we place it on there again
 
     if (type == atTop)
     {
         setTickLabelPadding(3);
         setLabelPadding(6);
     }
     else if (type == atRight)
     {
         setTickLabelPadding(7);
         setLabelPadding(12);
     }
     else if (type == atBottom)
     {
         setTickLabelPadding(3);
         setLabelPadding(3);
     }
     else if (type == atLeft)
     {
         setTickLabelPadding(5);
         setLabelPadding(10);
     }
 }
 
 QCPAxis::~QCPAxis()
 {
     delete mAxisPainter;
     delete mGrid; // delete grid here instead of via parent ~QObject for better defined deletion order
 }
 
 /* No documentation as it is a property getter */
 int QCPAxis::tickLabelPadding() const
 {
     return mAxisPainter->tickLabelPadding;
 }
 
 /* No documentation as it is a property getter */
 double QCPAxis::tickLabelRotation() const
 {
     return mAxisPainter->tickLabelRotation;
 }
 
 /* No documentation as it is a property getter */
 QCPAxis::LabelSide QCPAxis::tickLabelSide() const
 {
     return mAxisPainter->tickLabelSide;
 }
 
 /* No documentation as it is a property getter */
 QString QCPAxis::numberFormat() const
 {
     QString result;
     result.append(mNumberFormatChar);
     if (mNumberBeautifulPowers)
     {
         result.append(QLatin1Char('b'));
         if (mAxisPainter->numberMultiplyCross)
             result.append(QLatin1Char('c'));
     }
     return result;
 }
 
 /* No documentation as it is a property getter */
 int QCPAxis::tickLengthIn() const
 {
     return mAxisPainter->tickLengthIn;
 }
 
 /* No documentation as it is a property getter */
 int QCPAxis::tickLengthOut() const
 {
     return mAxisPainter->tickLengthOut;
 }
 
 /* No documentation as it is a property getter */
 int QCPAxis::subTickLengthIn() const
 {
     return mAxisPainter->subTickLengthIn;
 }
 
 /* No documentation as it is a property getter */
 int QCPAxis::subTickLengthOut() const
 {
     return mAxisPainter->subTickLengthOut;
 }
 
 /* No documentation as it is a property getter */
 int QCPAxis::labelPadding() const
 {
     return mAxisPainter->labelPadding;
 }
 
 /* No documentation as it is a property getter */
 int QCPAxis::offset() const
 {
     return mAxisPainter->offset;
 }
 
 /* No documentation as it is a property getter */
 QCPLineEnding QCPAxis::lowerEnding() const
 {
     return mAxisPainter->lowerEnding;
 }
 
 /* No documentation as it is a property getter */
 QCPLineEnding QCPAxis::upperEnding() const
 {
     return mAxisPainter->upperEnding;
 }
 
 /*!
   Sets whether the axis uses a linear scale or a logarithmic scale.
 
   Note that this method controls the coordinate transformation. You will likely also want to use a
   logarithmic tick spacing and labeling, which can be achieved by setting an instance of \ref
   QCPAxisTickerLog via \ref setTicker. See the documentation of \ref QCPAxisTickerLog about the
   details of logarithmic axis tick creation.
 
   \ref setNumberPrecision
 */
 void QCPAxis::setScaleType(QCPAxis::ScaleType type)
 {
     if (mScaleType != type)
     {
         mScaleType = type;
         if (mScaleType == stLogarithmic)
             setRange(mRange.sanitizedForLogScale());
         mCachedMarginValid = false;
         emit scaleTypeChanged(mScaleType);
     }
 }
 
 /*!
   Sets the range of the axis.
 
   This slot may be connected with the \ref rangeChanged signal of another axis so this axis
   is always synchronized with the other axis range, when it changes.
 
   To invert the direction of an axis, use \ref setRangeReversed.
 */
 void QCPAxis::setRange(const QCPRange &range)
 {
     if (range.lower == mRange.lower && range.upper == mRange.upper)
         return;
 
     if (!QCPRange::validRange(range))
         return;
     QCPRange oldRange = mRange;
     if (mScaleType == stLogarithmic)
     {
         mRange = range.sanitizedForLogScale();
     }
     else
     {
         mRange = range.sanitizedForLinScale();
     }
     emit rangeChanged(mRange);
     emit rangeChanged(mRange, oldRange);
 }
 
 /*!
   Sets whether the user can (de-)select the parts in \a selectable by clicking on the QCustomPlot surface.
   (When \ref QCustomPlot::setInteractions contains iSelectAxes.)
 
   However, even when \a selectable is set to a value not allowing the selection of a specific part,
   it is still possible to set the selection of this part manually, by calling \ref setSelectedParts
   directly.
 
   \see SelectablePart, setSelectedParts
 */
 void QCPAxis::setSelectableParts(const SelectableParts &selectable)
 {
     if (mSelectableParts != selectable)
     {
         mSelectableParts = selectable;
         emit selectableChanged(mSelectableParts);
     }
 }
 
 /*!
   Sets the selected state of the respective axis parts described by \ref SelectablePart. When a part
   is selected, it uses a different pen/font.
 
   The entire selection mechanism for axes is handled automatically when \ref
   QCustomPlot::setInteractions contains iSelectAxes. You only need to call this function when you
   wish to change the selection state manually.
 
   This function can change the selection state of a part, independent of the \ref setSelectableParts setting.
 
   emits the \ref selectionChanged signal when \a selected is different from the previous selection state.
 
   \see SelectablePart, setSelectableParts, selectTest, setSelectedBasePen, setSelectedTickPen, setSelectedSubTickPen,
   setSelectedTickLabelFont, setSelectedLabelFont, setSelectedTickLabelColor, setSelectedLabelColor
 */
 void QCPAxis::setSelectedParts(const SelectableParts &selected)
 {
     if (mSelectedParts != selected)
     {
         mSelectedParts = selected;
         emit selectionChanged(mSelectedParts);
     }
 }
 
 /*!
   \overload
 
   Sets the lower and upper bound of the axis range.
 
   To invert the direction of an axis, use \ref setRangeReversed.
 
   There is also a slot to set a range, see \ref setRange(const QCPRange &range).
 */
 void QCPAxis::setRange(double lower, double upper)
 {
     if (lower == mRange.lower && upper == mRange.upper)
         return;
 
     if (!QCPRange::validRange(lower, upper))
         return;
     QCPRange oldRange = mRange;
     mRange.lower      = lower;
     mRange.upper      = upper;
     if (mScaleType == stLogarithmic)
     {
         mRange = mRange.sanitizedForLogScale();
     }
     else
     {
         mRange = mRange.sanitizedForLinScale();
     }
     emit rangeChanged(mRange);
     emit rangeChanged(mRange, oldRange);
 }
 
 /*!
   \overload
 
   Sets the range of the axis.
 
   The \a position coordinate indicates together with the \a alignment parameter, where the new
   range will be positioned. \a size defines the size of the new axis range. \a alignment may be
   Qt::AlignLeft, Qt::AlignRight or Qt::AlignCenter. This will cause the left border, right border,
   or center of the range to be aligned with \a position. Any other values of \a alignment will
   default to Qt::AlignCenter.
 */
 void QCPAxis::setRange(double position, double size, Qt::AlignmentFlag alignment)
 {
     if (alignment == Qt::AlignLeft)
         setRange(position, position + size);
     else if (alignment == Qt::AlignRight)
         setRange(position - size, position);
     else // alignment == Qt::AlignCenter
         setRange(position - size / 2.0, position + size / 2.0);
 }
 
 /*!
   Sets the lower bound of the axis range. The upper bound is not changed.
   \see setRange
 */
 void QCPAxis::setRangeLower(double lower)
 {
     if (mRange.lower == lower)
         return;
 
     QCPRange oldRange = mRange;
     mRange.lower      = lower;
     if (mScaleType == stLogarithmic)
     {
         mRange = mRange.sanitizedForLogScale();
     }
     else
     {
         mRange = mRange.sanitizedForLinScale();
     }
     emit rangeChanged(mRange);
     emit rangeChanged(mRange, oldRange);
 }
 
 /*!
   Sets the upper bound of the axis range. The lower bound is not changed.
   \see setRange
 */
 void QCPAxis::setRangeUpper(double upper)
 {
     if (mRange.upper == upper)
         return;
 
     QCPRange oldRange = mRange;
     mRange.upper      = upper;
     if (mScaleType == stLogarithmic)
     {
         mRange = mRange.sanitizedForLogScale();
     }
     else
     {
         mRange = mRange.sanitizedForLinScale();
     }
     emit rangeChanged(mRange);
     emit rangeChanged(mRange, oldRange);
 }
 
 /*!
   Sets whether the axis range (direction) is displayed reversed. Normally, the values on horizontal
   axes increase left to right, on vertical axes bottom to top. When \a reversed is set to true, the
   direction of increasing values is inverted.
 
   Note that the range and data interface stays the same for reversed axes, e.g. the \a lower part
   of the \ref setRange interface will still reference the mathematically smaller number than the \a
   upper part.
 */
 void QCPAxis::setRangeReversed(bool reversed)
 {
     mRangeReversed = reversed;
 }
 
 /*!
   The axis ticker is responsible for generating the tick positions and tick labels. See the
   documentation of QCPAxisTicker for details on how to work with axis tickers.
 
   You can change the tick positioning/labeling behaviour of this axis by setting a different
   QCPAxisTicker subclass using this method. If you only wish to modify the currently installed axis
   ticker, access it via \ref ticker.
 
   Since the ticker is stored in the axis as a shared pointer, multiple axes may share the same axis
   ticker simply by passing the same shared pointer to multiple axes.
 
   \see ticker
 */
 void QCPAxis::setTicker(QSharedPointer<QCPAxisTicker> ticker)
 {
     if (ticker)
         mTicker = ticker;
     else
         qDebug() << Q_FUNC_INFO << "can not set 0 as axis ticker";
     // no need to invalidate margin cache here because produced tick labels are checked for changes in setupTickVector
 }
 
 /*!
   Sets whether tick marks are displayed.
 
   Note that setting \a show to false does not imply that tick labels are invisible, too. To achieve
   that, see \ref setTickLabels.
 
   \see setSubTicks
 */
 void QCPAxis::setTicks(bool show)
 {
     if (mTicks != show)
     {
         mTicks             = show;
         mCachedMarginValid = false;
     }
 }
 
 /*!
   Sets whether tick labels are displayed. Tick labels are the numbers drawn next to tick marks.
 */
 void QCPAxis::setTickLabels(bool show)
 {
     if (mTickLabels != show)
     {
         mTickLabels        = show;
         mCachedMarginValid = false;
         if (!mTickLabels)
             mTickVectorLabels.clear();
     }
 }
 
 /*!
   Sets the distance between the axis base line (including any outward ticks) and the tick labels.
   \see setLabelPadding, setPadding
 */
 void QCPAxis::setTickLabelPadding(int padding)
 {
     if (mAxisPainter->tickLabelPadding != padding)
     {
         mAxisPainter->tickLabelPadding = padding;
         mCachedMarginValid             = false;
     }
 }
 
 /*!
   Sets the font of the tick labels.
 
   \see setTickLabels, setTickLabelColor
 */
 void QCPAxis::setTickLabelFont(const QFont &font)
 {
     if (font != mTickLabelFont)
     {
         mTickLabelFont     = font;
         mCachedMarginValid = false;
     }
 }
 
 /*!
   Sets the color of the tick labels.
 
   \see setTickLabels, setTickLabelFont
 */
 void QCPAxis::setTickLabelColor(const QColor &color)
 {
     mTickLabelColor = color;
 }
 
 /*!
   Sets the rotation of the tick labels. If \a degrees is zero, the labels are drawn normally. Else,
   the tick labels are drawn rotated by \a degrees clockwise. The specified angle is bound to values
   from -90 to 90 degrees.
 
   If \a degrees is exactly -90, 0 or 90, the tick labels are centered on the tick coordinate. For
   other angles, the label is drawn with an offset such that it seems to point toward or away from
   the tick mark.
 */
 void QCPAxis::setTickLabelRotation(double degrees)
 {
     if (!qFuzzyIsNull(degrees - mAxisPainter->tickLabelRotation))
     {
         mAxisPainter->tickLabelRotation = qBound(-90.0, degrees, 90.0);
         mCachedMarginValid              = false;
     }
 }
 
 /*!
   Sets whether the tick labels (numbers) shall appear inside or outside the axis rect.
 
   The usual and default setting is \ref lsOutside. Very compact plots sometimes require tick labels
   to be inside the axis rect, to save space. If \a side is set to \ref lsInside, the tick labels
   appear on the inside are additionally clipped to the axis rect.
 */
 void QCPAxis::setTickLabelSide(LabelSide side)
 {
     mAxisPainter->tickLabelSide = side;
     mCachedMarginValid          = false;
 }
 
 /*!
   Sets the number format for the numbers in tick labels. This \a formatCode is an extended version
   of the format code used e.g. by QString::number() and QLocale::toString(). For reference about
   that, see the "Argument Formats" section in the detailed description of the QString class.
 
   \a formatCode is a string of one, two or three characters. The first character is identical to
   the normal format code used by Qt. In short, this means: 'e'/'E' scientific format, 'f' fixed
   format, 'g'/'G' scientific or fixed, whichever is shorter.
 
   The second and third characters are optional and specific to QCustomPlot:\n
   If the first char was 'e' or 'g', numbers are/might be displayed in the scientific format, e.g.
   "5.5e9", which is ugly in a plot. So when the second char of \a formatCode is set to 'b' (for
   "beautiful"), those exponential numbers are formatted in a more natural way, i.e. "5.5
   [multiplication sign] 10 [superscript] 9". By default, the multiplication sign is a centered dot.
   If instead a cross should be shown (as is usual in the USA), the third char of \a formatCode can
   be set to 'c'. The inserted multiplication signs are the UTF-8 characters 215 (0xD7) for the
   cross and 183 (0xB7) for the dot.
 
   Examples for \a formatCode:
   \li \c g normal format code behaviour. If number is small, fixed format is used, if number is large,
   normal scientific format is used
   \li \c gb If number is small, fixed format is used, if number is large, scientific format is used with
   beautifully typeset decimal powers and a dot as multiplication sign
   \li \c ebc All numbers are in scientific format with beautifully typeset decimal power and a cross as
   multiplication sign
   \li \c fb illegal format code, since fixed format doesn't support (or need) beautifully typeset decimal
   powers. Format code will be reduced to 'f'.
   \li \c hello illegal format code, since first char is not 'e', 'E', 'f', 'g' or 'G'. Current format
   code will not be changed.
 */
 void QCPAxis::setNumberFormat(const QString &formatCode)
 {
     if (formatCode.isEmpty())
     {
         qDebug() << Q_FUNC_INFO << "Passed formatCode is empty";
         return;
     }
     mCachedMarginValid = false;
 
     // interpret first char as number format char:
     QString allowedFormatChars(QLatin1String("eEfgG"));
     if (allowedFormatChars.contains(formatCode.at(0)))
     {
         mNumberFormatChar = QLatin1Char(formatCode.at(0).toLatin1());
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Invalid number format code (first char not in 'eEfgG'):" << formatCode;
         return;
     }
     if (formatCode.length() < 2)
     {
         mNumberBeautifulPowers            = false;
         mAxisPainter->numberMultiplyCross = false;
         return;
     }
 
     // interpret second char as indicator for beautiful decimal powers:
     if (formatCode.at(1) == QLatin1Char('b') &&
         (mNumberFormatChar == QLatin1Char('e') || mNumberFormatChar == QLatin1Char('g')))
     {
         mNumberBeautifulPowers = true;
     }
     else
     {
         qDebug() << Q_FUNC_INFO
                  << "Invalid number format code (second char not 'b' or first char neither 'e' nor 'g'):" << formatCode;
         return;
     }
     if (formatCode.length() < 3)
     {
         mAxisPainter->numberMultiplyCross = false;
         return;
     }
 
     // interpret third char as indicator for dot or cross multiplication symbol:
     if (formatCode.at(2) == QLatin1Char('c'))
     {
         mAxisPainter->numberMultiplyCross = true;
     }
     else if (formatCode.at(2) == QLatin1Char('d'))
     {
         mAxisPainter->numberMultiplyCross = false;
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Invalid number format code (third char neither 'c' nor 'd'):" << formatCode;
         return;
     }
 }
 
 /*!
   Sets the precision of the tick label numbers. See QLocale::toString(double i, char f, int prec)
   for details. The effect of precisions are most notably for number Formats starting with 'e', see
   \ref setNumberFormat
 */
 void QCPAxis::setNumberPrecision(int precision)
 {
     if (mNumberPrecision != precision)
     {
         mNumberPrecision   = precision;
         mCachedMarginValid = false;
     }
 }
 
 /*!
   Sets the length of the ticks in pixels. \a inside is the length the ticks will reach inside the
   plot and \a outside is the length they will reach outside the plot. If \a outside is greater than
   zero, the tick labels and axis label will increase their distance to the axis accordingly, so
   they won't collide with the ticks.
 
   \see setSubTickLength, setTickLengthIn, setTickLengthOut
 */
 void QCPAxis::setTickLength(int inside, int outside)
 {
     setTickLengthIn(inside);
     setTickLengthOut(outside);
 }
 
 /*!
   Sets the length of the inward ticks in pixels. \a inside is the length the ticks will reach
   inside the plot.
 
   \see setTickLengthOut, setTickLength, setSubTickLength
 */
 void QCPAxis::setTickLengthIn(int inside)
 {
     if (mAxisPainter->tickLengthIn != inside)
     {
         mAxisPainter->tickLengthIn = inside;
     }
 }
 
 /*!
   Sets the length of the outward ticks in pixels. \a outside is the length the ticks will reach
   outside the plot. If \a outside is greater than zero, the tick labels and axis label will
   increase their distance to the axis accordingly, so they won't collide with the ticks.
 
   \see setTickLengthIn, setTickLength, setSubTickLength
 */
 void QCPAxis::setTickLengthOut(int outside)
 {
     if (mAxisPainter->tickLengthOut != outside)
     {
         mAxisPainter->tickLengthOut = outside;
         mCachedMarginValid          = false; // only outside tick length can change margin
     }
 }
 
 /*!
   Sets whether sub tick marks are displayed.
 
   Sub ticks are only potentially visible if (major) ticks are also visible (see \ref setTicks)
 
   \see setTicks
 */
 void QCPAxis::setSubTicks(bool show)
 {
     if (mSubTicks != show)
     {
         mSubTicks          = show;
         mCachedMarginValid = false;
     }
 }
 
 /*!
   Sets the length of the subticks in pixels. \a inside is the length the subticks will reach inside
   the plot and \a outside is the length they will reach outside the plot. If \a outside is greater
   than zero, the tick labels and axis label will increase their distance to the axis accordingly,
   so they won't collide with the ticks.
 
   \see setTickLength, setSubTickLengthIn, setSubTickLengthOut
 */
 void QCPAxis::setSubTickLength(int inside, int outside)
 {
     setSubTickLengthIn(inside);
     setSubTickLengthOut(outside);
 }
 
 /*!
   Sets the length of the inward subticks in pixels. \a inside is the length the subticks will reach inside
   the plot.
 
   \see setSubTickLengthOut, setSubTickLength, setTickLength
 */
 void QCPAxis::setSubTickLengthIn(int inside)
 {
     if (mAxisPainter->subTickLengthIn != inside)
     {
         mAxisPainter->subTickLengthIn = inside;
     }
 }
 
 /*!
   Sets the length of the outward subticks in pixels. \a outside is the length the subticks will reach
   outside the plot. If \a outside is greater than zero, the tick labels will increase their
   distance to the axis accordingly, so they won't collide with the ticks.
 
   \see setSubTickLengthIn, setSubTickLength, setTickLength
 */
 void QCPAxis::setSubTickLengthOut(int outside)
 {
     if (mAxisPainter->subTickLengthOut != outside)
     {
         mAxisPainter->subTickLengthOut = outside;
         mCachedMarginValid             = false; // only outside tick length can change margin
     }
 }
 
 /*!
   Sets the pen, the axis base line is drawn with.
 
   \see setTickPen, setSubTickPen
 */
 void QCPAxis::setBasePen(const QPen &pen)
 {
     mBasePen = pen;
 }
 
 /*!
   Sets the pen, tick marks will be drawn with.
 
   \see setTickLength, setBasePen
 */
 void QCPAxis::setTickPen(const QPen &pen)
 {
     mTickPen = pen;
 }
 
 /*!
   Sets the pen, subtick marks will be drawn with.
 
   \see setSubTickCount, setSubTickLength, setBasePen
 */
 void QCPAxis::setSubTickPen(const QPen &pen)
 {
     mSubTickPen = pen;
 }
 
 /*!
   Sets the font of the axis label.
 
   \see setLabelColor
 */
 void QCPAxis::setLabelFont(const QFont &font)
 {
     if (mLabelFont != font)
     {
         mLabelFont         = font;
         mCachedMarginValid = false;
     }
 }
 
 /*!
   Sets the color of the axis label.
 
   \see setLabelFont
 */
 void QCPAxis::setLabelColor(const QColor &color)
 {
     mLabelColor = color;
 }
 
 /*!
   Sets the text of the axis label that will be shown below/above or next to the axis, depending on
   its orientation. To disable axis labels, pass an empty string as \a str.
 */
 void QCPAxis::setLabel(const QString &str)
 {
     if (mLabel != str)
     {
         mLabel             = str;
         mCachedMarginValid = false;
     }
 }
 
 /*!
   Sets the distance between the tick labels and the axis label.
 
   \see setTickLabelPadding, setPadding
 */
 void QCPAxis::setLabelPadding(int padding)
 {
     if (mAxisPainter->labelPadding != padding)
     {
         mAxisPainter->labelPadding = padding;
         mCachedMarginValid         = false;
     }
 }
 
 /*!
   Sets the padding of the axis.
 
   When \ref QCPAxisRect::setAutoMargins is enabled, the padding is the additional outer most space,
   that is left blank.
 
   The axis padding has no meaning if \ref QCPAxisRect::setAutoMargins is disabled.
 
   \see setLabelPadding, setTickLabelPadding
 */
 void QCPAxis::setPadding(int padding)
 {
     if (mPadding != padding)
     {
         mPadding           = padding;
         mCachedMarginValid = false;
     }
 }
 
 /*!
   Sets the offset the axis has to its axis rect side.
 
   If an axis rect side has multiple axes and automatic margin calculation is enabled for that side,
   only the offset of the inner most axis has meaning (even if it is set to be invisible). The
   offset of the other, outer axes is controlled automatically, to place them at appropriate
   positions.
 */
 void QCPAxis::setOffset(int offset)
 {
     mAxisPainter->offset = offset;
 }
 
 /*!
   Sets the font that is used for tick labels when they are selected.
 
   \see setTickLabelFont, setSelectableParts, setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAxis::setSelectedTickLabelFont(const QFont &font)
 {
     if (font != mSelectedTickLabelFont)
     {
         mSelectedTickLabelFont = font;
         // don't set mCachedMarginValid to false here because margin calculation is always done with non-selected fonts
     }
 }
 
 /*!
   Sets the font that is used for the axis label when it is selected.
 
   \see setLabelFont, setSelectableParts, setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAxis::setSelectedLabelFont(const QFont &font)
 {
     mSelectedLabelFont = font;
     // don't set mCachedMarginValid to false here because margin calculation is always done with non-selected fonts
 }
 
 /*!
   Sets the color that is used for tick labels when they are selected.
 
   \see setTickLabelColor, setSelectableParts, setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAxis::setSelectedTickLabelColor(const QColor &color)
 {
     if (color != mSelectedTickLabelColor)
     {
         mSelectedTickLabelColor = color;
     }
 }
 
 /*!
   Sets the color that is used for the axis label when it is selected.
 
   \see setLabelColor, setSelectableParts, setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAxis::setSelectedLabelColor(const QColor &color)
 {
     mSelectedLabelColor = color;
 }
 
 /*!
   Sets the pen that is used to draw the axis base line when selected.
 
   \see setBasePen, setSelectableParts, setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAxis::setSelectedBasePen(const QPen &pen)
 {
     mSelectedBasePen = pen;
 }
 
 /*!
   Sets the pen that is used to draw the (major) ticks when selected.
 
   \see setTickPen, setSelectableParts, setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAxis::setSelectedTickPen(const QPen &pen)
 {
     mSelectedTickPen = pen;
 }
 
 /*!
   Sets the pen that is used to draw the subticks when selected.
 
   \see setSubTickPen, setSelectableParts, setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAxis::setSelectedSubTickPen(const QPen &pen)
 {
     mSelectedSubTickPen = pen;
 }
 
 /*!
   Sets the style for the lower axis ending. See the documentation of QCPLineEnding for available
   styles.
 
   For horizontal axes, this method refers to the left ending, for vertical axes the bottom ending.
   Note that this meaning does not change when the axis range is reversed with \ref
   setRangeReversed.
 
   \see setUpperEnding
 */
 void QCPAxis::setLowerEnding(const QCPLineEnding &ending)
 {
     mAxisPainter->lowerEnding = ending;
 }
 
 /*!
   Sets the style for the upper axis ending. See the documentation of QCPLineEnding for available
   styles.
 
   For horizontal axes, this method refers to the right ending, for vertical axes the top ending.
   Note that this meaning does not change when the axis range is reversed with \ref
   setRangeReversed.
 
   \see setLowerEnding
 */
 void QCPAxis::setUpperEnding(const QCPLineEnding &ending)
 {
     mAxisPainter->upperEnding = ending;
 }
 
 /*!
   If the scale type (\ref setScaleType) is \ref stLinear, \a diff is added to the lower and upper
   bounds of the range. The range is simply moved by \a diff.
 
   If the scale type is \ref stLogarithmic, the range bounds are multiplied by \a diff. This
   corresponds to an apparent "linear" move in logarithmic scaling by a distance of log(diff).
 */
 void QCPAxis::moveRange(double diff)
 {
     QCPRange oldRange = mRange;
     if (mScaleType == stLinear)
     {
         mRange.lower += diff;
         mRange.upper += diff;
     }
     else // mScaleType == stLogarithmic
     {
         mRange.lower *= diff;
         mRange.upper *= diff;
     }
     emit rangeChanged(mRange);
     emit rangeChanged(mRange, oldRange);
 }
 
 /*!
   Scales the range of this axis by \a factor around the center of the current axis range. For
   example, if \a factor is 2.0, then the axis range will double its size, and the point at the axis
   range center won't have changed its position in the QCustomPlot widget (i.e. coordinates around
   the center will have moved symmetrically closer).
 
   If you wish to scale around a different coordinate than the current axis range center, use the
   overload \ref scaleRange(double factor, double center).
 */
 void QCPAxis::scaleRange(double factor)
 {
     scaleRange(factor, range().center());
 }
 
 /*! \overload
 
   Scales the range of this axis by \a factor around the coordinate \a center. For example, if \a
   factor is 2.0, \a center is 1.0, then the axis range will double its size, and the point at
   coordinate 1.0 won't have changed its position in the QCustomPlot widget (i.e. coordinates
   around 1.0 will have moved symmetrically closer to 1.0).
 
   \see scaleRange(double factor)
 */
 void QCPAxis::scaleRange(double factor, double center)
 {
     QCPRange oldRange = mRange;
     if (mScaleType == stLinear)
     {
         QCPRange newRange;
         newRange.lower = (mRange.lower - center) * factor + center;
         newRange.upper = (mRange.upper - center) * factor + center;
         if (QCPRange::validRange(newRange))
             mRange = newRange.sanitizedForLinScale();
     }
     else // mScaleType == stLogarithmic
     {
         if ((mRange.upper < 0 && center < 0) ||
             (mRange.upper > 0 && center > 0)) // make sure center has same sign as range
         {
             QCPRange newRange;
             newRange.lower = qPow(mRange.lower / center, factor) * center;
             newRange.upper = qPow(mRange.upper / center, factor) * center;
             if (QCPRange::validRange(newRange))
                 mRange = newRange.sanitizedForLogScale();
         }
         else
             qDebug() << Q_FUNC_INFO
                      << "Center of scaling operation doesn't lie in same logarithmic sign domain as range:" << center;
     }
     emit rangeChanged(mRange);
     emit rangeChanged(mRange, oldRange);
 }
 
 /*!
   Scales the range of this axis to have a certain scale \a ratio to \a otherAxis. The scaling will
   be done around the center of the current axis range.
 
   For example, if \a ratio is 1, this axis is the \a yAxis and \a otherAxis is \a xAxis, graphs
   plotted with those axes will appear in a 1:1 aspect ratio, independent of the aspect ratio the
   axis rect has.
 
   This is an operation that changes the range of this axis once, it doesn't fix the scale ratio
   indefinitely. Note that calling this function in the constructor of the QCustomPlot's parent
   won't have the desired effect, since the widget dimensions aren't defined yet, and a resizeEvent
   will follow.
 */
 void QCPAxis::setScaleRatio(const QCPAxis *otherAxis, double ratio)
 {
     int otherPixelSize, ownPixelSize;
 
     if (otherAxis->orientation() == Qt::Horizontal)
         otherPixelSize = otherAxis->axisRect()->width();
     else
         otherPixelSize = otherAxis->axisRect()->height();
 
     if (orientation() == Qt::Horizontal)
         ownPixelSize = axisRect()->width();
     else
         ownPixelSize = axisRect()->height();
 
     double newRangeSize = ratio * otherAxis->range().size() * ownPixelSize / (double)otherPixelSize;
     setRange(range().center(), newRangeSize, Qt::AlignCenter);
 }
 
 /*!
   Changes the axis range such that all plottables associated with this axis are fully visible in
   that dimension.
 
   \see QCPAbstractPlottable::rescaleAxes, QCustomPlot::rescaleAxes
 */
 void QCPAxis::rescale(bool onlyVisiblePlottables)
 {
     QList<QCPAbstractPlottable *> p = plottables();
     QCPRange newRange;
     bool haveRange = false;
     for (int i = 0; i < p.size(); ++i)
     {
         if (!p.at(i)->realVisibility() && onlyVisiblePlottables)
             continue;
         QCPRange plottableRange;
         bool currentFoundRange;
         QCP::SignDomain signDomain = QCP::sdBoth;
         if (mScaleType == stLogarithmic)
             signDomain = (mRange.upper < 0 ? QCP::sdNegative : QCP::sdPositive);
         if (p.at(i)->keyAxis() == this)
             plottableRange = p.at(i)->getKeyRange(currentFoundRange, signDomain);
         else
             plottableRange = p.at(i)->getValueRange(currentFoundRange, signDomain);
         if (currentFoundRange)
         {
             if (!haveRange)
                 newRange = plottableRange;
             else
                 newRange.expand(plottableRange);
             haveRange = true;
         }
     }
     if (haveRange)
     {
         if (!QCPRange::validRange(
                 newRange)) // likely due to range being zero (plottable has only constant data in this axis dimension), shift current range to at least center the plottable
         {
             double center =
                 (newRange.lower + newRange.upper) *
                 0.5; // upper and lower should be equal anyway, but just to make sure, incase validRange returned false for other reason
             if (mScaleType == stLinear)
             {
                 newRange.lower = center - mRange.size() / 2.0;
                 newRange.upper = center + mRange.size() / 2.0;
             }
             else // mScaleType == stLogarithmic
             {
                 newRange.lower = center / qSqrt(mRange.upper / mRange.lower);
                 newRange.upper = center * qSqrt(mRange.upper / mRange.lower);
             }
         }
         setRange(newRange);
     }
 }
 
 /*!
   Transforms \a value, in pixel coordinates of the QCustomPlot widget, to axis coordinates.
 */
 double QCPAxis::pixelToCoord(double value) const
 {
     if (orientation() == Qt::Horizontal)
     {
         if (mScaleType == stLinear)
         {
             if (!mRangeReversed)
                 return (value - mAxisRect->left()) / (double)mAxisRect->width() * mRange.size() + mRange.lower;
             else
                 return -(value - mAxisRect->left()) / (double)mAxisRect->width() * mRange.size() + mRange.upper;
         }
         else // mScaleType == stLogarithmic
         {
             if (!mRangeReversed)
                 return qPow(mRange.upper / mRange.lower, (value - mAxisRect->left()) / (double)mAxisRect->width()) *
                        mRange.lower;
             else
                 return qPow(mRange.upper / mRange.lower, (mAxisRect->left() - value) / (double)mAxisRect->width()) *
                        mRange.upper;
         }
     }
     else // orientation() == Qt::Vertical
     {
         if (mScaleType == stLinear)
         {
             if (!mRangeReversed)
                 return (mAxisRect->bottom() - value) / (double)mAxisRect->height() * mRange.size() + mRange.lower;
             else
                 return -(mAxisRect->bottom() - value) / (double)mAxisRect->height() * mRange.size() + mRange.upper;
         }
         else // mScaleType == stLogarithmic
         {
             if (!mRangeReversed)
                 return qPow(mRange.upper / mRange.lower, (mAxisRect->bottom() - value) / (double)mAxisRect->height()) *
                        mRange.lower;
             else
                 return qPow(mRange.upper / mRange.lower, (value - mAxisRect->bottom()) / (double)mAxisRect->height()) *
                        mRange.upper;
         }
     }
 }
 
 /*!
   Transforms \a value, in coordinates of the axis, to pixel coordinates of the QCustomPlot widget.
 */
 double QCPAxis::coordToPixel(double value) const
 {
     if (orientation() == Qt::Horizontal)
     {
         if (mScaleType == stLinear)
         {
             if (!mRangeReversed)
                 return (value - mRange.lower) / mRange.size() * mAxisRect->width() + mAxisRect->left();
             else
                 return (mRange.upper - value) / mRange.size() * mAxisRect->width() + mAxisRect->left();
         }
         else // mScaleType == stLogarithmic
         {
             if (value >= 0 &&
                 mRange.upper < 0) // invalid value for logarithmic scale, just draw it outside visible range
                 return !mRangeReversed ? mAxisRect->right() + 200 : mAxisRect->left() - 200;
             else if (value <= 0 &&
                      mRange.upper > 0) // invalid value for logarithmic scale, just draw it outside visible range
                 return !mRangeReversed ? mAxisRect->left() - 200 : mAxisRect->right() + 200;
             else
             {
                 if (!mRangeReversed)
                     return qLn(value / mRange.lower) / qLn(mRange.upper / mRange.lower) * mAxisRect->width() +
                            mAxisRect->left();
                 else
                     return qLn(mRange.upper / value) / qLn(mRange.upper / mRange.lower) * mAxisRect->width() +
                            mAxisRect->left();
             }
         }
     }
     else // orientation() == Qt::Vertical
     {
         if (mScaleType == stLinear)
         {
             if (!mRangeReversed)
                 return mAxisRect->bottom() - (value - mRange.lower) / mRange.size() * mAxisRect->height();
             else
                 return mAxisRect->bottom() - (mRange.upper - value) / mRange.size() * mAxisRect->height();
         }
         else // mScaleType == stLogarithmic
         {
             if (value >= 0 &&
                 mRange.upper < 0) // invalid value for logarithmic scale, just draw it outside visible range
                 return !mRangeReversed ? mAxisRect->top() - 200 : mAxisRect->bottom() + 200;
             else if (value <= 0 &&
                      mRange.upper > 0) // invalid value for logarithmic scale, just draw it outside visible range
                 return !mRangeReversed ? mAxisRect->bottom() + 200 : mAxisRect->top() - 200;
             else
             {
                 if (!mRangeReversed)
                     return mAxisRect->bottom() -
                            qLn(value / mRange.lower) / qLn(mRange.upper / mRange.lower) * mAxisRect->height();
                 else
                     return mAxisRect->bottom() -
                            qLn(mRange.upper / value) / qLn(mRange.upper / mRange.lower) * mAxisRect->height();
             }
         }
     }
 }
 
 /*!
   Returns the part of the axis that is hit by \a pos (in pixels). The return value of this function
   is independent of the user-selectable parts defined with \ref setSelectableParts. Further, this
   function does not change the current selection state of the axis.
 
   If the axis is not visible (\ref setVisible), this function always returns \ref spNone.
 
   \see setSelectedParts, setSelectableParts, QCustomPlot::setInteractions
 */
 QCPAxis::SelectablePart QCPAxis::getPartAt(const QPointF &pos) const
 {
     if (!mVisible)
         return spNone;
 
     if (mAxisPainter->axisSelectionBox().contains(pos.toPoint()))
         return spAxis;
     else if (mAxisPainter->tickLabelsSelectionBox().contains(pos.toPoint()))
         return spTickLabels;
     else if (mAxisPainter->labelSelectionBox().contains(pos.toPoint()))
         return spAxisLabel;
     else
         return spNone;
 }
 
 /* inherits documentation from base class */
 double QCPAxis::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     if (!mParentPlot)
         return -1;
     SelectablePart part = getPartAt(pos);
     if ((onlySelectable && !mSelectableParts.testFlag(part)) || part == spNone)
         return -1;
 
     if (details)
         details->setValue(part);
     return mParentPlot->selectionTolerance() * 0.99;
 }
 
 /*!
   Returns a list of all the plottables that have this axis as key or value axis.
 
   If you are only interested in plottables of type QCPGraph, see \ref graphs.
 
   \see graphs, items
 */
 QList<QCPAbstractPlottable *> QCPAxis::plottables() const
 {
     QList<QCPAbstractPlottable *> result;
     if (!mParentPlot)
         return result;
 
     for (int i = 0; i < mParentPlot->mPlottables.size(); ++i)
     {
         if (mParentPlot->mPlottables.at(i)->keyAxis() == this || mParentPlot->mPlottables.at(i)->valueAxis() == this)
             result.append(mParentPlot->mPlottables.at(i));
     }
     return result;
 }
 
 /*!
   Returns a list of all the graphs that have this axis as key or value axis.
 
   \see plottables, items
 */
 QList<QCPGraph *> QCPAxis::graphs() const
 {
     QList<QCPGraph *> result;
     if (!mParentPlot)
         return result;
 
     for (int i = 0; i < mParentPlot->mGraphs.size(); ++i)
     {
         if (mParentPlot->mGraphs.at(i)->keyAxis() == this || mParentPlot->mGraphs.at(i)->valueAxis() == this)
             result.append(mParentPlot->mGraphs.at(i));
     }
     return result;
 }
 
 /*!
   Returns a list of all the items that are associated with this axis. An item is considered
   associated with an axis if at least one of its positions uses the axis as key or value axis.
 
   \see plottables, graphs
 */
 QList<QCPAbstractItem *> QCPAxis::items() const
 {
     QList<QCPAbstractItem *> result;
     if (!mParentPlot)
         return result;
 
     for (int itemId = 0; itemId < mParentPlot->mItems.size(); ++itemId)
     {
         QList<QCPItemPosition *> positions = mParentPlot->mItems.at(itemId)->positions();
         for (int posId = 0; posId < positions.size(); ++posId)
         {
             if (positions.at(posId)->keyAxis() == this || positions.at(posId)->valueAxis() == this)
             {
                 result.append(mParentPlot->mItems.at(itemId));
                 break;
             }
         }
     }
     return result;
 }
 
 /*!
   Transforms a margin side to the logically corresponding axis type. (QCP::msLeft to
   QCPAxis::atLeft, QCP::msRight to QCPAxis::atRight, etc.)
 */
 QCPAxis::AxisType QCPAxis::marginSideToAxisType(QCP::MarginSide side)
 {
     switch (side)
     {
         case QCP::msLeft:
             return atLeft;
         case QCP::msRight:
             return atRight;
         case QCP::msTop:
             return atTop;
         case QCP::msBottom:
             return atBottom;
         default:
             break;
     }
     qDebug() << Q_FUNC_INFO << "Invalid margin side passed:" << (int)side;
     return atLeft;
 }
 
 /*!
   Returns the axis type that describes the opposite axis of an axis with the specified \a type.
 */
 QCPAxis::AxisType QCPAxis::opposite(QCPAxis::AxisType type)
 {
     switch (type)
     {
         case atLeft:
             return atRight;
             break;
         case atRight:
             return atLeft;
             break;
         case atBottom:
             return atTop;
             break;
         case atTop:
             return atBottom;
             break;
         default:
             qDebug() << Q_FUNC_INFO << "invalid axis type";
             return atLeft;
             break;
     }
 }
 
 /* inherits documentation from base class */
 void QCPAxis::selectEvent(QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged)
 {
     Q_UNUSED(event)
     SelectablePart part = details.value<SelectablePart>();
     if (mSelectableParts.testFlag(part))
     {
         SelectableParts selBefore = mSelectedParts;
         setSelectedParts(additive ? mSelectedParts ^ part : part);
         if (selectionStateChanged)
             *selectionStateChanged = mSelectedParts != selBefore;
     }
 }
 
 /* inherits documentation from base class */
 void QCPAxis::deselectEvent(bool *selectionStateChanged)
 {
     SelectableParts selBefore = mSelectedParts;
     setSelectedParts(mSelectedParts & ~mSelectableParts);
     if (selectionStateChanged)
         *selectionStateChanged = mSelectedParts != selBefore;
 }
 
 /*! \internal
 
   A convenience function to easily set the QPainter::Antialiased hint on the provided \a painter
   before drawing axis lines.
 
   This is the antialiasing state the painter passed to the \ref draw method is in by default.
 
   This function takes into account the local setting of the antialiasing flag as well as the
   overrides set with \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 
   \seebaseclassmethod
 
   \see setAntialiased
 */
 void QCPAxis::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aeAxes);
 }
 
 /*! \internal
 
   Draws the axis with the specified \a painter, using the internal QCPAxisPainterPrivate instance.
 
   \seebaseclassmethod
 */
 void QCPAxis::draw(QCPPainter *painter)
 {
     QVector<double> subTickPositions; // the final coordToPixel transformed vector passed to QCPAxisPainter
     QVector<double> tickPositions;    // the final coordToPixel transformed vector passed to QCPAxisPainter
     QVector<QString> tickLabels;      // the final vector passed to QCPAxisPainter
     tickPositions.reserve(mTickVector.size());
     tickLabels.reserve(mTickVector.size());
     subTickPositions.reserve(mSubTickVector.size());
 
     if (mTicks)
     {
         for (int i = 0; i < mTickVector.size(); ++i)
         {
             tickPositions.append(coordToPixel(mTickVector.at(i)));
             if (mTickLabels)
                 tickLabels.append(mTickVectorLabels.at(i));
         }
 
         if (mSubTicks)
         {
             const int subTickCount = mSubTickVector.size();
             for (int i = 0; i < subTickCount; ++i)
                 subTickPositions.append(coordToPixel(mSubTickVector.at(i)));
         }
     }
 
     // transfer all properties of this axis to QCPAxisPainterPrivate which it needs to draw the axis.
     // Note that some axis painter properties are already set by direct feed-through with QCPAxis setters
     mAxisPainter->type                    = mAxisType;
     mAxisPainter->basePen                 = getBasePen();
     mAxisPainter->labelFont               = getLabelFont();
     mAxisPainter->labelColor              = getLabelColor();
     mAxisPainter->label                   = mLabel;
     mAxisPainter->substituteExponent      = mNumberBeautifulPowers;
     mAxisPainter->tickPen                 = getTickPen();
     mAxisPainter->subTickPen              = getSubTickPen();
     mAxisPainter->tickLabelFont           = getTickLabelFont();
     mAxisPainter->tickLabelColor          = getTickLabelColor();
     mAxisPainter->axisRect                = mAxisRect->rect();
     mAxisPainter->viewportRect            = mParentPlot->viewport();
     mAxisPainter->abbreviateDecimalPowers = mScaleType == stLogarithmic;
     mAxisPainter->reversedEndings         = mRangeReversed;
     mAxisPainter->tickPositions           = tickPositions;
     mAxisPainter->tickLabels              = tickLabels;
     mAxisPainter->subTickPositions        = subTickPositions;
     mAxisPainter->draw(painter);
 }
 
 /*! \internal
 
   Prepares the internal tick vector, sub tick vector and tick label vector. This is done by calling
   QCPAxisTicker::generate on the currently installed ticker.
 
   If a change in the label text/count is detected, the cached axis margin is invalidated to make
   sure the next margin calculation recalculates the label sizes and returns an up-to-date value.
 */
 void QCPAxis::setupTickVectors()
 {
     if (!mParentPlot)
         return;
     if ((!mTicks && !mTickLabels && !mGrid->visible()) || mRange.size() <= 0)
         return;
 
     QVector<QString> oldLabels = mTickVectorLabels;
     mTicker->generate(mRange, mParentPlot->locale(), mNumberFormatChar, mNumberPrecision, mTickVector,
-                      mSubTicks ? &mSubTickVector : 0, mTickLabels ? &mTickVectorLabels : 0);
+                      mSubTicks ? &mSubTickVector : nullptr, mTickLabels ? &mTickVectorLabels : nullptr);
     mCachedMarginValid &= mTickVectorLabels == oldLabels; // if labels have changed, margin might have changed, too
 }
 
 /*! \internal
 
   Returns the pen that is used to draw the axis base line. Depending on the selection state, this
   is either mSelectedBasePen or mBasePen.
 */
 QPen QCPAxis::getBasePen() const
 {
     return mSelectedParts.testFlag(spAxis) ? mSelectedBasePen : mBasePen;
 }
 
 /*! \internal
 
   Returns the pen that is used to draw the (major) ticks. Depending on the selection state, this
   is either mSelectedTickPen or mTickPen.
 */
 QPen QCPAxis::getTickPen() const
 {
     return mSelectedParts.testFlag(spAxis) ? mSelectedTickPen : mTickPen;
 }
 
 /*! \internal
 
   Returns the pen that is used to draw the subticks. Depending on the selection state, this
   is either mSelectedSubTickPen or mSubTickPen.
 */
 QPen QCPAxis::getSubTickPen() const
 {
     return mSelectedParts.testFlag(spAxis) ? mSelectedSubTickPen : mSubTickPen;
 }
 
 /*! \internal
 
   Returns the font that is used to draw the tick labels. Depending on the selection state, this
   is either mSelectedTickLabelFont or mTickLabelFont.
 */
 QFont QCPAxis::getTickLabelFont() const
 {
     return mSelectedParts.testFlag(spTickLabels) ? mSelectedTickLabelFont : mTickLabelFont;
 }
 
 /*! \internal
 
   Returns the font that is used to draw the axis label. Depending on the selection state, this
   is either mSelectedLabelFont or mLabelFont.
 */
 QFont QCPAxis::getLabelFont() const
 {
     return mSelectedParts.testFlag(spAxisLabel) ? mSelectedLabelFont : mLabelFont;
 }
 
 /*! \internal
 
   Returns the color that is used to draw the tick labels. Depending on the selection state, this
   is either mSelectedTickLabelColor or mTickLabelColor.
 */
 QColor QCPAxis::getTickLabelColor() const
 {
     return mSelectedParts.testFlag(spTickLabels) ? mSelectedTickLabelColor : mTickLabelColor;
 }
 
 /*! \internal
 
   Returns the color that is used to draw the axis label. Depending on the selection state, this
   is either mSelectedLabelColor or mLabelColor.
 */
 QColor QCPAxis::getLabelColor() const
 {
     return mSelectedParts.testFlag(spAxisLabel) ? mSelectedLabelColor : mLabelColor;
 }
 
 /*! \internal
 
   Returns the appropriate outward margin for this axis. It is needed if \ref
   QCPAxisRect::setAutoMargins is set to true on the parent axis rect. An axis with axis type \ref
   atLeft will return an appropriate left margin, \ref atBottom will return an appropriate bottom
   margin and so forth. For the calculation, this function goes through similar steps as \ref draw,
   so changing one function likely requires the modification of the other one as well.
 
   The margin consists of the outward tick length, tick label padding, tick label size, label
   padding, label size, and padding.
 
   The margin is cached internally, so repeated calls while leaving the axis range, fonts, etc.
   unchanged are very fast.
 */
 int QCPAxis::calculateMargin()
 {
     if (!mVisible) // if not visible, directly return 0, don't cache 0 because we can't react to setVisible in QCPAxis
         return 0;
 
     if (mCachedMarginValid)
         return mCachedMargin;
 
     // run through similar steps as QCPAxis::draw, and calculate margin needed to fit axis and its labels
     int margin = 0;
 
     QVector<double> tickPositions; // the final coordToPixel transformed vector passed to QCPAxisPainter
     QVector<QString> tickLabels;   // the final vector passed to QCPAxisPainter
     tickPositions.reserve(mTickVector.size());
     tickLabels.reserve(mTickVector.size());
 
     if (mTicks)
     {
         for (int i = 0; i < mTickVector.size(); ++i)
         {
             tickPositions.append(coordToPixel(mTickVector.at(i)));
             if (mTickLabels)
                 tickLabels.append(mTickVectorLabels.at(i));
         }
     }
     // transfer all properties of this axis to QCPAxisPainterPrivate which it needs to calculate the size.
     // Note that some axis painter properties are already set by direct feed-through with QCPAxis setters
     mAxisPainter->type          = mAxisType;
     mAxisPainter->labelFont     = getLabelFont();
     mAxisPainter->label         = mLabel;
     mAxisPainter->tickLabelFont = mTickLabelFont;
     mAxisPainter->axisRect      = mAxisRect->rect();
     mAxisPainter->viewportRect  = mParentPlot->viewport();
     mAxisPainter->tickPositions = tickPositions;
     mAxisPainter->tickLabels    = tickLabels;
     margin += mAxisPainter->size();
     margin += mPadding;
 
     mCachedMargin      = margin;
     mCachedMarginValid = true;
     return margin;
 }
 
 /* inherits documentation from base class */
 QCP::Interaction QCPAxis::selectionCategory() const
 {
     return QCP::iSelectAxes;
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisPainterPrivate
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAxisPainterPrivate
 
   \internal
   \brief (Private)
 
   This is a private class and not part of the public QCustomPlot interface.
 
   It is used by QCPAxis to do the low-level drawing of axis backbone, tick marks, tick labels and
   axis label. It also buffers the labels to reduce replot times. The parameters are configured by
   directly accessing the public member variables.
 */
 
 /*!
   Constructs a QCPAxisPainterPrivate instance. Make sure to not create a new instance on every
   redraw, to utilize the caching mechanisms.
 */
 QCPAxisPainterPrivate::QCPAxisPainterPrivate(QCustomPlot *parentPlot)
     : type(QCPAxis::atLeft), basePen(QPen(Qt::black, 0, Qt::SolidLine, Qt::SquareCap)),
       lowerEnding(QCPLineEnding::esNone), upperEnding(QCPLineEnding::esNone), labelPadding(0), tickLabelPadding(0),
       tickLabelRotation(0), tickLabelSide(QCPAxis::lsOutside), substituteExponent(true), numberMultiplyCross(false),
       tickLengthIn(5), tickLengthOut(0), subTickLengthIn(2), subTickLengthOut(0),
       tickPen(QPen(Qt::black, 0, Qt::SolidLine, Qt::SquareCap)),
       subTickPen(QPen(Qt::black, 0, Qt::SolidLine, Qt::SquareCap)), offset(0), abbreviateDecimalPowers(false),
       reversedEndings(false), mParentPlot(parentPlot), mLabelCache(16) // cache at most 16 (tick) labels
 {
 }
 
 QCPAxisPainterPrivate::~QCPAxisPainterPrivate()
 {
 }
 
 /*! \internal
 
   Draws the axis with the specified \a painter.
 
   The selection boxes (mAxisSelectionBox, mTickLabelsSelectionBox, mLabelSelectionBox) are set
   here, too.
 */
 void QCPAxisPainterPrivate::draw(QCPPainter *painter)
 {
     QByteArray newHash = generateLabelParameterHash();
     if (newHash != mLabelParameterHash)
     {
         mLabelCache.clear();
         mLabelParameterHash = newHash;
     }
 
     QPoint origin;
     switch (type)
     {
         case QCPAxis::atLeft:
             origin = axisRect.bottomLeft() + QPoint(-offset, 0);
             break;
         case QCPAxis::atRight:
             origin = axisRect.bottomRight() + QPoint(+offset, 0);
             break;
         case QCPAxis::atTop:
             origin = axisRect.topLeft() + QPoint(0, -offset);
             break;
         case QCPAxis::atBottom:
             origin = axisRect.bottomLeft() + QPoint(0, +offset);
             break;
     }
 
     double xCor = 0,
            yCor = 0; // paint system correction, for pixel exact matches (affects baselines and ticks of top/right axes)
     switch (type)
     {
         case QCPAxis::atTop:
             yCor = -1;
             break;
         case QCPAxis::atRight:
             xCor = 1;
             break;
         default:
             break;
     }
     int margin = 0;
     // draw baseline:
     QLineF baseLine;
     painter->setPen(basePen);
     if (QCPAxis::orientation(type) == Qt::Horizontal)
         baseLine.setPoints(origin + QPointF(xCor, yCor), origin + QPointF(axisRect.width() + xCor, yCor));
     else
         baseLine.setPoints(origin + QPointF(xCor, yCor), origin + QPointF(xCor, -axisRect.height() + yCor));
     if (reversedEndings)
         baseLine =
             QLineF(baseLine.p2(), baseLine.p1()); // won't make a difference for line itself, but for line endings later
     painter->drawLine(baseLine);
 
     // draw ticks:
     if (!tickPositions.isEmpty())
     {
         painter->setPen(tickPen);
         int tickDir = (type == QCPAxis::atBottom || type == QCPAxis::atRight) ?
                           -1 :
                           1; // direction of ticks ("inward" is right for left axis and left for right axis)
         if (QCPAxis::orientation(type) == Qt::Horizontal)
         {
             for (int i = 0; i < tickPositions.size(); ++i)
                 painter->drawLine(QLineF(tickPositions.at(i) + xCor, origin.y() - tickLengthOut * tickDir + yCor,
                                          tickPositions.at(i) + xCor, origin.y() + tickLengthIn * tickDir + yCor));
         }
         else
         {
             for (int i = 0; i < tickPositions.size(); ++i)
                 painter->drawLine(QLineF(origin.x() - tickLengthOut * tickDir + xCor, tickPositions.at(i) + yCor,
                                          origin.x() + tickLengthIn * tickDir + xCor, tickPositions.at(i) + yCor));
         }
     }
 
     // draw subticks:
     if (!subTickPositions.isEmpty())
     {
         painter->setPen(subTickPen);
         // direction of ticks ("inward" is right for left axis and left for right axis)
         int tickDir = (type == QCPAxis::atBottom || type == QCPAxis::atRight) ? -1 : 1;
         if (QCPAxis::orientation(type) == Qt::Horizontal)
         {
             for (int i = 0; i < subTickPositions.size(); ++i)
                 painter->drawLine(QLineF(subTickPositions.at(i) + xCor, origin.y() - subTickLengthOut * tickDir + yCor,
                                          subTickPositions.at(i) + xCor, origin.y() + subTickLengthIn * tickDir + yCor));
         }
         else
         {
             for (int i = 0; i < subTickPositions.size(); ++i)
                 painter->drawLine(QLineF(origin.x() - subTickLengthOut * tickDir + xCor, subTickPositions.at(i) + yCor,
                                          origin.x() + subTickLengthIn * tickDir + xCor, subTickPositions.at(i) + yCor));
         }
     }
     margin += qMax(0, qMax(tickLengthOut, subTickLengthOut));
 
     // draw axis base endings:
     bool antialiasingBackup = painter->antialiasing();
     painter->setAntialiasing(true); // always want endings to be antialiased, even if base and ticks themselves aren't
     painter->setBrush(QBrush(basePen.color()));
     QCPVector2D baseLineVector(baseLine.dx(), baseLine.dy());
     if (lowerEnding.style() != QCPLineEnding::esNone)
         lowerEnding.draw(painter,
                          QCPVector2D(baseLine.p1()) -
                              baseLineVector.normalized() * lowerEnding.realLength() * (lowerEnding.inverted() ? -1 : 1),
                          -baseLineVector);
     if (upperEnding.style() != QCPLineEnding::esNone)
         upperEnding.draw(painter,
                          QCPVector2D(baseLine.p2()) +
                              baseLineVector.normalized() * upperEnding.realLength() * (upperEnding.inverted() ? -1 : 1),
                          baseLineVector);
     painter->setAntialiasing(antialiasingBackup);
 
     // tick labels:
     QRect oldClipRect;
     if (tickLabelSide == QCPAxis::lsInside) // if using inside labels, clip them to the axis rect
     {
         oldClipRect = painter->clipRegion().boundingRect();
         painter->setClipRect(axisRect);
     }
     QSize tickLabelsSize(0, 0); // size of largest tick label, for offset calculation of axis label
     if (!tickLabels.isEmpty())
     {
         if (tickLabelSide == QCPAxis::lsOutside)
             margin += tickLabelPadding;
         painter->setFont(tickLabelFont);
         painter->setPen(QPen(tickLabelColor));
         const int maxLabelIndex = qMin(tickPositions.size(), tickLabels.size());
         int distanceToAxis      = margin;
         if (tickLabelSide == QCPAxis::lsInside)
             distanceToAxis = -(qMax(tickLengthIn, subTickLengthIn) + tickLabelPadding);
         for (int i = 0; i < maxLabelIndex; ++i)
             placeTickLabel(painter, tickPositions.at(i), distanceToAxis, tickLabels.at(i), &tickLabelsSize);
         if (tickLabelSide == QCPAxis::lsOutside)
             margin += (QCPAxis::orientation(type) == Qt::Horizontal) ? tickLabelsSize.height() : tickLabelsSize.width();
     }
     if (tickLabelSide == QCPAxis::lsInside)
         painter->setClipRect(oldClipRect);
 
     // axis label:
     QRect labelBounds;
     if (!label.isEmpty())
     {
         margin += labelPadding;
         painter->setFont(labelFont);
         painter->setPen(QPen(labelColor));
         labelBounds = painter->fontMetrics().boundingRect(0, 0, 0, 0, Qt::TextDontClip, label);
         if (type == QCPAxis::atLeft)
         {
             QTransform oldTransform = painter->transform();
             painter->translate((origin.x() - margin - labelBounds.height()), origin.y());
             painter->rotate(-90);
             painter->drawText(0, 0, axisRect.height(), labelBounds.height(), Qt::TextDontClip | Qt::AlignCenter, label);
             painter->setTransform(oldTransform);
         }
         else if (type == QCPAxis::atRight)
         {
             QTransform oldTransform = painter->transform();
             painter->translate((origin.x() + margin + labelBounds.height()), origin.y() - axisRect.height());
             painter->rotate(90);
             painter->drawText(0, 0, axisRect.height(), labelBounds.height(), Qt::TextDontClip | Qt::AlignCenter, label);
             painter->setTransform(oldTransform);
         }
         else if (type == QCPAxis::atTop)
             painter->drawText(origin.x(), origin.y() - margin - labelBounds.height(), axisRect.width(),
                               labelBounds.height(), Qt::TextDontClip | Qt::AlignCenter, label);
         else if (type == QCPAxis::atBottom)
             painter->drawText(origin.x(), origin.y() + margin, axisRect.width(), labelBounds.height(),
                               Qt::TextDontClip | Qt::AlignCenter, label);
     }
 
     // set selection boxes:
     int selectionTolerance = 0;
     if (mParentPlot)
         selectionTolerance = mParentPlot->selectionTolerance();
     else
         qDebug() << Q_FUNC_INFO << "mParentPlot is null";
     int selAxisOutSize = qMax(qMax(tickLengthOut, subTickLengthOut), selectionTolerance);
     int selAxisInSize  = selectionTolerance;
     int selTickLabelSize;
     int selTickLabelOffset;
     if (tickLabelSide == QCPAxis::lsOutside)
     {
         selTickLabelSize =
             (QCPAxis::orientation(type) == Qt::Horizontal ? tickLabelsSize.height() : tickLabelsSize.width());
         selTickLabelOffset = qMax(tickLengthOut, subTickLengthOut) + tickLabelPadding;
     }
     else
     {
         selTickLabelSize =
             -(QCPAxis::orientation(type) == Qt::Horizontal ? tickLabelsSize.height() : tickLabelsSize.width());
         selTickLabelOffset = -(qMax(tickLengthIn, subTickLengthIn) + tickLabelPadding);
     }
     int selLabelSize = labelBounds.height();
     int selLabelOffset =
         qMax(tickLengthOut, subTickLengthOut) +
         (!tickLabels.isEmpty() && tickLabelSide == QCPAxis::lsOutside ? tickLabelPadding + selTickLabelSize : 0) +
         labelPadding;
     if (type == QCPAxis::atLeft)
     {
         mAxisSelectionBox.setCoords(origin.x() - selAxisOutSize, axisRect.top(), origin.x() + selAxisInSize,
                                     axisRect.bottom());
         mTickLabelsSelectionBox.setCoords(origin.x() - selTickLabelOffset - selTickLabelSize, axisRect.top(),
                                           origin.x() - selTickLabelOffset, axisRect.bottom());
         mLabelSelectionBox.setCoords(origin.x() - selLabelOffset - selLabelSize, axisRect.top(),
                                      origin.x() - selLabelOffset, axisRect.bottom());
     }
     else if (type == QCPAxis::atRight)
     {
         mAxisSelectionBox.setCoords(origin.x() - selAxisInSize, axisRect.top(), origin.x() + selAxisOutSize,
                                     axisRect.bottom());
         mTickLabelsSelectionBox.setCoords(origin.x() + selTickLabelOffset + selTickLabelSize, axisRect.top(),
                                           origin.x() + selTickLabelOffset, axisRect.bottom());
         mLabelSelectionBox.setCoords(origin.x() + selLabelOffset + selLabelSize, axisRect.top(),
                                      origin.x() + selLabelOffset, axisRect.bottom());
     }
     else if (type == QCPAxis::atTop)
     {
         mAxisSelectionBox.setCoords(axisRect.left(), origin.y() - selAxisOutSize, axisRect.right(),
                                     origin.y() + selAxisInSize);
         mTickLabelsSelectionBox.setCoords(axisRect.left(), origin.y() - selTickLabelOffset - selTickLabelSize,
                                           axisRect.right(), origin.y() - selTickLabelOffset);
         mLabelSelectionBox.setCoords(axisRect.left(), origin.y() - selLabelOffset - selLabelSize, axisRect.right(),
                                      origin.y() - selLabelOffset);
     }
     else if (type == QCPAxis::atBottom)
     {
         mAxisSelectionBox.setCoords(axisRect.left(), origin.y() - selAxisInSize, axisRect.right(),
                                     origin.y() + selAxisOutSize);
         mTickLabelsSelectionBox.setCoords(axisRect.left(), origin.y() + selTickLabelOffset + selTickLabelSize,
                                           axisRect.right(), origin.y() + selTickLabelOffset);
         mLabelSelectionBox.setCoords(axisRect.left(), origin.y() + selLabelOffset + selLabelSize, axisRect.right(),
                                      origin.y() + selLabelOffset);
     }
     mAxisSelectionBox       = mAxisSelectionBox.normalized();
     mTickLabelsSelectionBox = mTickLabelsSelectionBox.normalized();
     mLabelSelectionBox      = mLabelSelectionBox.normalized();
     // draw hitboxes for debug purposes:
     //painter->setBrush(Qt::NoBrush);
     //painter->drawRects(QVector<QRect>() << mAxisSelectionBox << mTickLabelsSelectionBox << mLabelSelectionBox);
 }
 
 /*! \internal
 
   Returns the size ("margin" in QCPAxisRect context, so measured perpendicular to the axis backbone
   direction) needed to fit the axis.
 */
 int QCPAxisPainterPrivate::size() const
 {
     int result = 0;
 
     // get length of tick marks pointing outwards:
     if (!tickPositions.isEmpty())
         result += qMax(0, qMax(tickLengthOut, subTickLengthOut));
 
     // calculate size of tick labels:
     if (tickLabelSide == QCPAxis::lsOutside)
     {
         QSize tickLabelsSize(0, 0);
         if (!tickLabels.isEmpty())
         {
             for (int i = 0; i < tickLabels.size(); ++i)
                 getMaxTickLabelSize(tickLabelFont, tickLabels.at(i), &tickLabelsSize);
             result += QCPAxis::orientation(type) == Qt::Horizontal ? tickLabelsSize.height() : tickLabelsSize.width();
             result += tickLabelPadding;
         }
     }
 
     // calculate size of axis label (only height needed, because left/right labels are rotated by 90 degrees):
     if (!label.isEmpty())
     {
         QFontMetrics fontMetrics(labelFont);
         QRect bounds;
         bounds = fontMetrics.boundingRect(0, 0, 0, 0, Qt::TextDontClip | Qt::AlignHCenter | Qt::AlignVCenter, label);
         result += bounds.height() + labelPadding;
     }
 
     return result;
 }
 
 /*! \internal
 
   Clears the internal label cache. Upon the next \ref draw, all labels will be created new. This
   method is called automatically in \ref draw, if any parameters have changed that invalidate the
   cached labels, such as font, color, etc.
 */
 void QCPAxisPainterPrivate::clearCache()
 {
     mLabelCache.clear();
 }
 
 /*! \internal
 
   Returns a hash that allows uniquely identifying whether the label parameters have changed such
   that the cached labels must be refreshed (\ref clearCache). It is used in \ref draw. If the
   return value of this method hasn't changed since the last redraw, the respective label parameters
   haven't changed and cached labels may be used.
 */
 QByteArray QCPAxisPainterPrivate::generateLabelParameterHash() const
 {
     QByteArray result;
     result.append(QByteArray::number(mParentPlot->bufferDevicePixelRatio()));
     result.append(QByteArray::number(tickLabelRotation));
     result.append(QByteArray::number((int)tickLabelSide));
     result.append(QByteArray::number((int)substituteExponent));
     result.append(QByteArray::number((int)numberMultiplyCross));
     result.append(tickLabelColor.name().toLatin1() + QByteArray::number(tickLabelColor.alpha(), 16));
     result.append(tickLabelFont.toString().toLatin1());
     return result;
 }
 
 /*! \internal
 
   Draws a single tick label with the provided \a painter, utilizing the internal label cache to
   significantly speed up drawing of labels that were drawn in previous calls. The tick label is
   always bound to an axis, the distance to the axis is controllable via \a distanceToAxis in
   pixels. The pixel position in the axis direction is passed in the \a position parameter. Hence
   for the bottom axis, \a position would indicate the horizontal pixel position (not coordinate),
   at which the label should be drawn.
 
   In order to later draw the axis label in a place that doesn't overlap with the tick labels, the
   largest tick label size is needed. This is acquired by passing a \a tickLabelsSize to the \ref
   drawTickLabel calls during the process of drawing all tick labels of one axis. In every call, \a
   tickLabelsSize is expanded, if the drawn label exceeds the value \a tickLabelsSize currently
   holds.
 
   The label is drawn with the font and pen that are currently set on the \a painter. To draw
   superscripted powers, the font is temporarily made smaller by a fixed factor (see \ref
   getTickLabelData).
 */
 void QCPAxisPainterPrivate::placeTickLabel(QCPPainter *painter, double position, int distanceToAxis,
                                            const QString &text, QSize *tickLabelsSize)
 {
     // warning: if you change anything here, also adapt getMaxTickLabelSize() accordingly!
     if (text.isEmpty())
         return;
     QSize finalSize;
     QPointF labelAnchor;
     switch (type)
     {
         case QCPAxis::atLeft:
             labelAnchor = QPointF(axisRect.left() - distanceToAxis - offset, position);
             break;
         case QCPAxis::atRight:
             labelAnchor = QPointF(axisRect.right() + distanceToAxis + offset, position);
             break;
         case QCPAxis::atTop:
             labelAnchor = QPointF(position, axisRect.top() - distanceToAxis - offset);
             break;
         case QCPAxis::atBottom:
             labelAnchor = QPointF(position, axisRect.bottom() + distanceToAxis + offset);
             break;
     }
     if (mParentPlot->plottingHints().testFlag(QCP::phCacheLabels) &&
         !painter->modes().testFlag(QCPPainter::pmNoCaching)) // label caching enabled
     {
         CachedLabel *cachedLabel = mLabelCache.take(text); // attempt to get label from cache
         if (!cachedLabel)                                  // no cached label existed, create it
         {
             cachedLabel             = new CachedLabel;
             TickLabelData labelData = getTickLabelData(painter->font(), text);
             cachedLabel->offset     = getTickLabelDrawOffset(labelData) + labelData.rotatedTotalBounds.topLeft();
             if (!qFuzzyCompare(1.0, mParentPlot->bufferDevicePixelRatio()))
             {
                 cachedLabel->pixmap =
                     QPixmap(labelData.rotatedTotalBounds.size() * mParentPlot->bufferDevicePixelRatio());
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
                 cachedLabel->pixmap.setDevicePixelRatio(mParentPlot->devicePixelRatio());
 #endif
             }
             else
                 cachedLabel->pixmap = QPixmap(labelData.rotatedTotalBounds.size());
             cachedLabel->pixmap = QPixmap(labelData.rotatedTotalBounds.size());
             cachedLabel->pixmap.fill(Qt::transparent);
             QCPPainter cachePainter(&cachedLabel->pixmap);
             cachePainter.setPen(painter->pen());
             drawTickLabel(&cachePainter, -labelData.rotatedTotalBounds.topLeft().x(),
                           -labelData.rotatedTotalBounds.topLeft().y(), labelData);
         }
         // if label would be partly clipped by widget border on sides, don't draw it (only for outside tick labels):
         bool labelClippedByBorder = false;
         if (tickLabelSide == QCPAxis::lsOutside)
         {
             if (QCPAxis::orientation(type) == Qt::Horizontal)
                 labelClippedByBorder = labelAnchor.x() + cachedLabel->offset.x() +
                                                cachedLabel->pixmap.width() / mParentPlot->bufferDevicePixelRatio() >
                                            viewportRect.right() ||
                                        labelAnchor.x() + cachedLabel->offset.x() < viewportRect.left();
             else
                 labelClippedByBorder = labelAnchor.y() + cachedLabel->offset.y() +
                                                cachedLabel->pixmap.height() / mParentPlot->bufferDevicePixelRatio() >
                                            viewportRect.bottom() ||
                                        labelAnchor.y() + cachedLabel->offset.y() < viewportRect.top();
         }
         if (!labelClippedByBorder)
         {
             painter->drawPixmap(labelAnchor + cachedLabel->offset, cachedLabel->pixmap);
             finalSize = cachedLabel->pixmap.size() / mParentPlot->bufferDevicePixelRatio();
         }
         mLabelCache.insert(text, cachedLabel); // return label to cache or insert for the first time if newly created
     }
     else // label caching disabled, draw text directly on surface:
     {
         TickLabelData labelData = getTickLabelData(painter->font(), text);
         QPointF finalPosition   = labelAnchor + getTickLabelDrawOffset(labelData);
         // if label would be partly clipped by widget border on sides, don't draw it (only for outside tick labels):
         bool labelClippedByBorder = false;
         if (tickLabelSide == QCPAxis::lsOutside)
         {
             if (QCPAxis::orientation(type) == Qt::Horizontal)
                 labelClippedByBorder =
                     finalPosition.x() + (labelData.rotatedTotalBounds.width() + labelData.rotatedTotalBounds.left()) >
                         viewportRect.right() ||
                     finalPosition.x() + labelData.rotatedTotalBounds.left() < viewportRect.left();
             else
                 labelClippedByBorder =
                     finalPosition.y() + (labelData.rotatedTotalBounds.height() + labelData.rotatedTotalBounds.top()) >
                         viewportRect.bottom() ||
                     finalPosition.y() + labelData.rotatedTotalBounds.top() < viewportRect.top();
         }
         if (!labelClippedByBorder)
         {
             drawTickLabel(painter, finalPosition.x(), finalPosition.y(), labelData);
             finalSize = labelData.rotatedTotalBounds.size();
         }
     }
 
     // expand passed tickLabelsSize if current tick label is larger:
     if (finalSize.width() > tickLabelsSize->width())
         tickLabelsSize->setWidth(finalSize.width());
     if (finalSize.height() > tickLabelsSize->height())
         tickLabelsSize->setHeight(finalSize.height());
 }
 
 /*! \internal
 
   This is a \ref placeTickLabel helper function.
 
   Draws the tick label specified in \a labelData with \a painter at the pixel positions \a x and \a
   y. This function is used by \ref placeTickLabel to create new tick labels for the cache, or to
   directly draw the labels on the QCustomPlot surface when label caching is disabled, i.e. when
   QCP::phCacheLabels plotting hint is not set.
 */
 void QCPAxisPainterPrivate::drawTickLabel(QCPPainter *painter, double x, double y, const TickLabelData &labelData) const
 {
     // backup painter settings that we're about to change:
     QTransform oldTransform = painter->transform();
     QFont oldFont           = painter->font();
 
     // transform painter to position/rotation:
     painter->translate(x, y);
     if (!qFuzzyIsNull(tickLabelRotation))
         painter->rotate(tickLabelRotation);
 
     // draw text:
     if (!labelData.expPart.isEmpty()) // indicator that beautiful powers must be used
     {
         painter->setFont(labelData.baseFont);
         painter->drawText(0, 0, 0, 0, Qt::TextDontClip, labelData.basePart);
         if (!labelData.suffixPart.isEmpty())
             painter->drawText(labelData.baseBounds.width() + 1 + labelData.expBounds.width(), 0, 0, 0, Qt::TextDontClip,
                               labelData.suffixPart);
         painter->setFont(labelData.expFont);
         painter->drawText(labelData.baseBounds.width() + 1, 0, labelData.expBounds.width(),
                           labelData.expBounds.height(), Qt::TextDontClip, labelData.expPart);
     }
     else
     {
         painter->setFont(labelData.baseFont);
         painter->drawText(0, 0, labelData.totalBounds.width(), labelData.totalBounds.height(),
                           Qt::TextDontClip | Qt::AlignHCenter, labelData.basePart);
     }
 
     // reset painter settings to what it was before:
     painter->setTransform(oldTransform);
     painter->setFont(oldFont);
 }
 
 /*! \internal
 
   This is a \ref placeTickLabel helper function.
 
   Transforms the passed \a text and \a font to a tickLabelData structure that can then be further
   processed by \ref getTickLabelDrawOffset and \ref drawTickLabel. It splits the text into base and
   exponent if necessary (member substituteExponent) and calculates appropriate bounding boxes.
 */
 QCPAxisPainterPrivate::TickLabelData QCPAxisPainterPrivate::getTickLabelData(const QFont &font,
                                                                              const QString &text) const
 {
     TickLabelData result;
 
     // determine whether beautiful decimal powers should be used
     bool useBeautifulPowers = false;
     int ePos  = -1; // first index of exponent part, text before that will be basePart, text until eLast will be expPart
     int eLast = -1; // last index of exponent part, rest of text after this will be suffixPart
     if (substituteExponent)
     {
         ePos = text.indexOf(QLatin1Char('e'));
         if (ePos > 0 && text.at(ePos - 1).isDigit())
         {
             eLast = ePos;
             while (eLast + 1 < text.size() && (text.at(eLast + 1) == QLatin1Char('+') ||
                                                text.at(eLast + 1) == QLatin1Char('-') || text.at(eLast + 1).isDigit()))
                 ++eLast;
             if (eLast > ePos) // only if also to right of 'e' is a digit/+/- interpret it as beautifiable power
                 useBeautifulPowers = true;
         }
     }
 
     // calculate text bounding rects and do string preparation for beautiful decimal powers:
     result.baseFont = font;
     if (result.baseFont.pointSizeF() >
         0) // might return -1 if specified with setPixelSize, in that case we can't do correction in next line
         result.baseFont.setPointSizeF(
             result.baseFont.pointSizeF() +
             0.05); // QFontMetrics.boundingRect has a bug for exact point sizes that make the results oscillate due to internal rounding
     if (useBeautifulPowers)
     {
         // split text into parts of number/symbol that will be drawn normally and part that will be drawn as exponent:
         result.basePart   = text.left(ePos);
         result.suffixPart = text.mid(eLast + 1); // also drawn normally but after exponent
         // in log scaling, we want to turn "1*10^n" into "10^n", else add multiplication sign and decimal base:
         if (abbreviateDecimalPowers && result.basePart == QLatin1String("1"))
             result.basePart = QLatin1String("10");
         else
             result.basePart += (numberMultiplyCross ? QString(QChar(215)) : QString(QChar(183))) + QLatin1String("10");
         result.expPart = text.mid(ePos + 1, eLast - ePos);
         // clip "+" and leading zeros off expPart:
         while (result.expPart.length() > 2 &&
                result.expPart.at(1) == QLatin1Char('0')) // length > 2 so we leave one zero when numberFormatChar is 'e'
             result.expPart.remove(1, 1);
         if (!result.expPart.isEmpty() && result.expPart.at(0) == QLatin1Char('+'))
             result.expPart.remove(0, 1);
         // prepare smaller font for exponent:
         result.expFont = font;
         if (result.expFont.pointSize() > 0)
             result.expFont.setPointSize(result.expFont.pointSize() * 0.75);
         else
             result.expFont.setPixelSize(result.expFont.pixelSize() * 0.75);
         // calculate bounding rects of base part(s), exponent part and total one:
         result.baseBounds = QFontMetrics(result.baseFont).boundingRect(0, 0, 0, 0, Qt::TextDontClip, result.basePart);
         result.expBounds  = QFontMetrics(result.expFont).boundingRect(0, 0, 0, 0, Qt::TextDontClip, result.expPart);
         if (!result.suffixPart.isEmpty())
             result.suffixBounds =
                 QFontMetrics(result.baseFont).boundingRect(0, 0, 0, 0, Qt::TextDontClip, result.suffixPart);
         result.totalBounds = result.baseBounds.adjusted(
             0, 0, result.expBounds.width() + result.suffixBounds.width() + 2,
             0); // +2 consists of the 1 pixel spacing between base and exponent (see drawTickLabel) and an extra pixel to include AA
     }
     else // useBeautifulPowers == false
     {
         result.basePart    = text;
         result.totalBounds = QFontMetrics(result.baseFont)
                                  .boundingRect(0, 0, 0, 0, Qt::TextDontClip | Qt::AlignHCenter, result.basePart);
     }
     result.totalBounds.moveTopLeft(QPoint(
         0,
         0)); // want bounding box aligned top left at origin, independent of how it was created, to make further processing simpler
 
     // calculate possibly different bounding rect after rotation:
     result.rotatedTotalBounds = result.totalBounds;
     if (!qFuzzyIsNull(tickLabelRotation))
     {
         QTransform transform;
         transform.rotate(tickLabelRotation);
         result.rotatedTotalBounds = transform.mapRect(result.rotatedTotalBounds);
     }
 
     return result;
 }
 
 /*! \internal
 
   This is a \ref placeTickLabel helper function.
 
   Calculates the offset at which the top left corner of the specified tick label shall be drawn.
   The offset is relative to a point right next to the tick the label belongs to.
 
   This function is thus responsible for e.g. centering tick labels under ticks and positioning them
   appropriately when they are rotated.
 */
 QPointF QCPAxisPainterPrivate::getTickLabelDrawOffset(const TickLabelData &labelData) const
 {
     /*
       calculate label offset from base point at tick (non-trivial, for best visual appearance): short
       explanation for bottom axis: The anchor, i.e. the point in the label that is placed
       horizontally under the corresponding tick is always on the label side that is closer to the
       axis (e.g. the left side of the text when we're rotating clockwise). On that side, the height
       is halved and the resulting point is defined the anchor. This way, a 90 degree rotated text
       will be centered under the tick (i.e. displaced horizontally by half its height). At the same
       time, a 45 degree rotated text will "point toward" its tick, as is typical for rotated tick
       labels.
     */
     bool doRotation = !qFuzzyIsNull(tickLabelRotation);
     bool flip       = qFuzzyCompare(qAbs(tickLabelRotation),
                               90.0); // perfect +/-90 degree flip. Indicates vertical label centering on vertical axes.
     double radians  = tickLabelRotation / 180.0 * M_PI;
     int x = 0, y = 0;
     if ((type == QCPAxis::atLeft && tickLabelSide == QCPAxis::lsOutside) ||
         (type == QCPAxis::atRight && tickLabelSide == QCPAxis::lsInside)) // Anchor at right side of tick label
     {
         if (doRotation)
         {
             if (tickLabelRotation > 0)
             {
                 x = -qCos(radians) * labelData.totalBounds.width();
                 y = flip ? -labelData.totalBounds.width() / 2.0 :
                            -qSin(radians) * labelData.totalBounds.width() -
                                qCos(radians) * labelData.totalBounds.height() / 2.0;
             }
             else
             {
                 x = -qCos(-radians) * labelData.totalBounds.width() - qSin(-radians) * labelData.totalBounds.height();
                 y = flip ? +labelData.totalBounds.width() / 2.0 :
                            +qSin(-radians) * labelData.totalBounds.width() -
                                qCos(-radians) * labelData.totalBounds.height() / 2.0;
             }
         }
         else
         {
             x = -labelData.totalBounds.width();
             y = -labelData.totalBounds.height() / 2.0;
         }
     }
     else if ((type == QCPAxis::atRight && tickLabelSide == QCPAxis::lsOutside) ||
              (type == QCPAxis::atLeft && tickLabelSide == QCPAxis::lsInside)) // Anchor at left side of tick label
     {
         if (doRotation)
         {
             if (tickLabelRotation > 0)
             {
                 x = +qSin(radians) * labelData.totalBounds.height();
                 y = flip ? -labelData.totalBounds.width() / 2.0 : -qCos(radians) * labelData.totalBounds.height() / 2.0;
             }
             else
             {
                 x = 0;
                 y = flip ? +labelData.totalBounds.width() / 2.0 :
                            -qCos(-radians) * labelData.totalBounds.height() / 2.0;
             }
         }
         else
         {
             x = 0;
             y = -labelData.totalBounds.height() / 2.0;
         }
     }
     else if ((type == QCPAxis::atTop && tickLabelSide == QCPAxis::lsOutside) ||
              (type == QCPAxis::atBottom && tickLabelSide == QCPAxis::lsInside)) // Anchor at bottom side of tick label
     {
         if (doRotation)
         {
             if (tickLabelRotation > 0)
             {
                 x = -qCos(radians) * labelData.totalBounds.width() +
                     qSin(radians) * labelData.totalBounds.height() / 2.0;
                 y = -qSin(radians) * labelData.totalBounds.width() - qCos(radians) * labelData.totalBounds.height();
             }
             else
             {
                 x = -qSin(-radians) * labelData.totalBounds.height() / 2.0;
                 y = -qCos(-radians) * labelData.totalBounds.height();
             }
         }
         else
         {
             x = -labelData.totalBounds.width() / 2.0;
             y = -labelData.totalBounds.height();
         }
     }
     else if ((type == QCPAxis::atBottom && tickLabelSide == QCPAxis::lsOutside) ||
              (type == QCPAxis::atTop && tickLabelSide == QCPAxis::lsInside)) // Anchor at top side of tick label
     {
         if (doRotation)
         {
             if (tickLabelRotation > 0)
             {
                 x = +qSin(radians) * labelData.totalBounds.height() / 2.0;
                 y = 0;
             }
             else
             {
                 x = -qCos(-radians) * labelData.totalBounds.width() -
                     qSin(-radians) * labelData.totalBounds.height() / 2.0;
                 y = +qSin(-radians) * labelData.totalBounds.width();
             }
         }
         else
         {
             x = -labelData.totalBounds.width() / 2.0;
             y = 0;
         }
     }
 
     return QPointF(x, y);
 }
 
 /*! \internal
 
   Simulates the steps done by \ref placeTickLabel by calculating bounding boxes of the text label
   to be drawn, depending on number format etc. Since only the largest tick label is wanted for the
   margin calculation, the passed \a tickLabelsSize is only expanded, if it's currently set to a
   smaller width/height.
 */
 void QCPAxisPainterPrivate::getMaxTickLabelSize(const QFont &font, const QString &text, QSize *tickLabelsSize) const
 {
     // note: this function must return the same tick label sizes as the placeTickLabel function.
     QSize finalSize;
     if (mParentPlot->plottingHints().testFlag(QCP::phCacheLabels) &&
         mLabelCache.contains(text)) // label caching enabled and have cached label
     {
         const CachedLabel *cachedLabel = mLabelCache.object(text);
         finalSize                      = cachedLabel->pixmap.size() / mParentPlot->bufferDevicePixelRatio();
     }
     else // label caching disabled or no label with this text cached:
     {
         TickLabelData labelData = getTickLabelData(font, text);
         finalSize               = labelData.rotatedTotalBounds.size();
     }
 
     // expand passed tickLabelsSize if current tick label is larger:
     if (finalSize.width() > tickLabelsSize->width())
         tickLabelsSize->setWidth(finalSize.width());
     if (finalSize.height() > tickLabelsSize->height())
         tickLabelsSize->setHeight(finalSize.height());
 }
 /* end of 'src/axis/axis.cpp' */
 
 /* including file 'src/scatterstyle.cpp', size 17420                         */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPScatterStyle
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPScatterStyle
   \brief Represents the visual appearance of scatter points
 
   This class holds information about shape, color and size of scatter points. In plottables like
   QCPGraph it is used to store how scatter points shall be drawn. For example, \ref
   QCPGraph::setScatterStyle takes a QCPScatterStyle instance.
 
   A scatter style consists of a shape (\ref setShape), a line color (\ref setPen) and possibly a
   fill (\ref setBrush), if the shape provides a fillable area. Further, the size of the shape can
   be controlled with \ref setSize.
 
   \section QCPScatterStyle-defining Specifying a scatter style
 
   You can set all these configurations either by calling the respective functions on an instance:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpscatterstyle-creation-1
 
   Or you can use one of the various constructors that take different parameter combinations, making
   it easy to specify a scatter style in a single call, like so:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpscatterstyle-creation-2
 
   \section QCPScatterStyle-undefinedpen Leaving the color/pen up to the plottable
 
   There are two constructors which leave the pen undefined: \ref QCPScatterStyle() and \ref
   QCPScatterStyle(ScatterShape shape, double size). If those constructors are used, a call to \ref
   isPenDefined will return false. It leads to scatter points that inherit the pen from the
   plottable that uses the scatter style. Thus, if such a scatter style is passed to QCPGraph, the line
   color of the graph (\ref QCPGraph::setPen) will be used by the scatter points. This makes
   it very convenient to set up typical scatter settings:
 
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpscatterstyle-shortcreation
 
   Notice that it wasn't even necessary to explicitly call a QCPScatterStyle constructor. This works
   because QCPScatterStyle provides a constructor that can transform a \ref ScatterShape directly
   into a QCPScatterStyle instance (that's the \ref QCPScatterStyle(ScatterShape shape, double size)
   constructor with a default for \a size). In those cases, C++ allows directly supplying a \ref
   ScatterShape, where actually a QCPScatterStyle is expected.
 
   \section QCPScatterStyle-custompath-and-pixmap Custom shapes and pixmaps
 
   QCPScatterStyle supports drawing custom shapes and arbitrary pixmaps as scatter points.
 
   For custom shapes, you can provide a QPainterPath with the desired shape to the \ref
   setCustomPath function or call the constructor that takes a painter path. The scatter shape will
   automatically be set to \ref ssCustom.
 
   For pixmaps, you call \ref setPixmap with the desired QPixmap. Alternatively you can use the
   constructor that takes a QPixmap. The scatter shape will automatically be set to \ref ssPixmap.
   Note that \ref setSize does not influence the appearance of the pixmap.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn bool QCPScatterStyle::isNone() const
 
   Returns whether the scatter shape is \ref ssNone.
 
   \see setShape
 */
 
 /*! \fn bool QCPScatterStyle::isPenDefined() const
 
   Returns whether a pen has been defined for this scatter style.
 
   The pen is undefined if a constructor is called that does not carry \a pen as parameter. Those
   are \ref QCPScatterStyle() and \ref QCPScatterStyle(ScatterShape shape, double size). If the pen
   is undefined, the pen of the respective plottable will be used for drawing scatters.
 
   If a pen was defined for this scatter style instance, and you now wish to undefine the pen, call
   \ref undefinePen.
 
   \see setPen
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a new QCPScatterStyle instance with size set to 6. No shape, pen or brush is defined.
 
   Since the pen is undefined (\ref isPenDefined returns false), the scatter color will be inherited
   from the plottable that uses this scatter style.
 */
 QCPScatterStyle::QCPScatterStyle() : mSize(6), mShape(ssNone), mPen(Qt::NoPen), mBrush(Qt::NoBrush), mPenDefined(false)
 {
 }
 
 /*!
   Creates a new QCPScatterStyle instance with shape set to \a shape and size to \a size. No pen or
   brush is defined.
 
   Since the pen is undefined (\ref isPenDefined returns false), the scatter color will be inherited
   from the plottable that uses this scatter style.
 */
 QCPScatterStyle::QCPScatterStyle(ScatterShape shape, double size)
     : mSize(size), mShape(shape), mPen(Qt::NoPen), mBrush(Qt::NoBrush), mPenDefined(false)
 {
 }
 
 /*!
   Creates a new QCPScatterStyle instance with shape set to \a shape, the pen color set to \a color,
   and size to \a size. No brush is defined, i.e. the scatter point will not be filled.
 */
 QCPScatterStyle::QCPScatterStyle(ScatterShape shape, const QColor &color, double size)
     : mSize(size), mShape(shape), mPen(QPen(color)), mBrush(Qt::NoBrush), mPenDefined(true)
 {
 }
 
 /*!
   Creates a new QCPScatterStyle instance with shape set to \a shape, the pen color set to \a color,
   the brush color to \a fill (with a solid pattern), and size to \a size.
 */
 QCPScatterStyle::QCPScatterStyle(ScatterShape shape, const QColor &color, const QColor &fill, double size)
     : mSize(size), mShape(shape), mPen(QPen(color)), mBrush(QBrush(fill)), mPenDefined(true)
 {
 }
 
 /*!
   Creates a new QCPScatterStyle instance with shape set to \a shape, the pen set to \a pen, the
   brush to \a brush, and size to \a size.
 
   \warning In some cases it might be tempting to directly use a pen style like <tt>Qt::NoPen</tt> as \a pen
   and a color like <tt>Qt::blue</tt> as \a brush. Notice however, that the corresponding call\n
   <tt>QCPScatterStyle(QCPScatterShape::ssCircle, Qt::NoPen, Qt::blue, 5)</tt>\n
   doesn't necessarily lead C++ to use this constructor in some cases, but might mistake
   <tt>Qt::NoPen</tt> for a QColor and use the
   \ref QCPScatterStyle(ScatterShape shape, const QColor &color, const QColor &fill, double size)
   constructor instead (which will lead to an unexpected look of the scatter points). To prevent
   this, be more explicit with the parameter types. For example, use <tt>QBrush(Qt::blue)</tt>
   instead of just <tt>Qt::blue</tt>, to clearly point out to the compiler that this constructor is
   wanted.
 */
 QCPScatterStyle::QCPScatterStyle(ScatterShape shape, const QPen &pen, const QBrush &brush, double size)
     : mSize(size), mShape(shape), mPen(pen), mBrush(brush), mPenDefined(pen.style() != Qt::NoPen)
 {
 }
 
 /*!
   Creates a new QCPScatterStyle instance which will show the specified \a pixmap. The scatter shape
   is set to \ref ssPixmap.
 */
 QCPScatterStyle::QCPScatterStyle(const QPixmap &pixmap)
     : mSize(5), mShape(ssPixmap), mPen(Qt::NoPen), mBrush(Qt::NoBrush), mPixmap(pixmap), mPenDefined(false)
 {
 }
 
 /*!
   Creates a new QCPScatterStyle instance with a custom shape that is defined via \a customPath. The
   scatter shape is set to \ref ssCustom.
 
   The custom shape line will be drawn with \a pen and filled with \a brush. The size has a slightly
   different meaning than for built-in scatter points: The custom path will be drawn scaled by a
   factor of \a size/6.0. Since the default \a size is 6, the custom path will appear at a its
   natural size by default. To double the size of the path for example, set \a size to 12.
 */
 QCPScatterStyle::QCPScatterStyle(const QPainterPath &customPath, const QPen &pen, const QBrush &brush, double size)
     : mSize(size), mShape(ssCustom), mPen(pen), mBrush(brush), mCustomPath(customPath),
       mPenDefined(pen.style() != Qt::NoPen)
 {
 }
 
 /*!
   Copies the specified \a properties from the \a other scatter style to this scatter style.
 */
 void QCPScatterStyle::setFromOther(const QCPScatterStyle &other, ScatterProperties properties)
 {
     if (properties.testFlag(spPen))
     {
         setPen(other.pen());
         if (!other.isPenDefined())
             undefinePen();
     }
     if (properties.testFlag(spBrush))
         setBrush(other.brush());
     if (properties.testFlag(spSize))
         setSize(other.size());
     if (properties.testFlag(spShape))
     {
         setShape(other.shape());
         if (other.shape() == ssPixmap)
             setPixmap(other.pixmap());
         else if (other.shape() == ssCustom)
             setCustomPath(other.customPath());
     }
 }
 
 /*!
   Sets the size (pixel diameter) of the drawn scatter points to \a size.
 
   \see setShape
 */
 void QCPScatterStyle::setSize(double size)
 {
     mSize = size;
 }
 
 /*!
   Sets the shape to \a shape.
 
   Note that the calls \ref setPixmap and \ref setCustomPath automatically set the shape to \ref
   ssPixmap and \ref ssCustom, respectively.
 
   \see setSize
 */
 void QCPScatterStyle::setShape(QCPScatterStyle::ScatterShape shape)
 {
     mShape = shape;
 }
 
 /*!
   Sets the pen that will be used to draw scatter points to \a pen.
 
   If the pen was previously undefined (see \ref isPenDefined), the pen is considered defined after
   a call to this function, even if \a pen is <tt>Qt::NoPen</tt>. If you have defined a pen
   previously by calling this function and now wish to undefine the pen, call \ref undefinePen.
 
   \see setBrush
 */
 void QCPScatterStyle::setPen(const QPen &pen)
 {
     mPenDefined = true;
     mPen        = pen;
 }
 
 /*!
   Sets the brush that will be used to fill scatter points to \a brush. Note that not all scatter
   shapes have fillable areas. For example, \ref ssPlus does not while \ref ssCircle does.
 
   \see setPen
 */
 void QCPScatterStyle::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   Sets the pixmap that will be drawn as scatter point to \a pixmap.
 
   Note that \ref setSize does not influence the appearance of the pixmap.
 
   The scatter shape is automatically set to \ref ssPixmap.
 */
 void QCPScatterStyle::setPixmap(const QPixmap &pixmap)
 {
     setShape(ssPixmap);
     mPixmap = pixmap;
 }
 
 /*!
   Sets the custom shape that will be drawn as scatter point to \a customPath.
 
   The scatter shape is automatically set to \ref ssCustom.
 */
 void QCPScatterStyle::setCustomPath(const QPainterPath &customPath)
 {
     setShape(ssCustom);
     mCustomPath = customPath;
 }
 
 /*!
   Sets this scatter style to have an undefined pen (see \ref isPenDefined for what an undefined pen
   implies).
 
   A call to \ref setPen will define a pen.
 */
 void QCPScatterStyle::undefinePen()
 {
     mPenDefined = false;
 }
 
 /*!
   Applies the pen and the brush of this scatter style to \a painter. If this scatter style has an
   undefined pen (\ref isPenDefined), sets the pen of \a painter to \a defaultPen instead.
 
   This function is used by plottables (or any class that wants to draw scatters) just before a
   number of scatters with this style shall be drawn with the \a painter.
 
   \see drawShape
 */
 void QCPScatterStyle::applyTo(QCPPainter *painter, const QPen &defaultPen) const
 {
     painter->setPen(mPenDefined ? mPen : defaultPen);
     painter->setBrush(mBrush);
 }
 
 /*!
   Draws the scatter shape with \a painter at position \a pos.
 
   This function does not modify the pen or the brush on the painter, as \ref applyTo is meant to be
   called before scatter points are drawn with \ref drawShape.
 
   \see applyTo
 */
 void QCPScatterStyle::drawShape(QCPPainter *painter, const QPointF &pos) const
 {
     drawShape(painter, pos.x(), pos.y());
 }
 
 /*! \overload
   Draws the scatter shape with \a painter at position \a x and \a y.
 */
 void QCPScatterStyle::drawShape(QCPPainter *painter, double x, double y) const
 {
     double w = mSize / 2.0;
     switch (mShape)
     {
         case ssNone:
             break;
         case ssDot:
         {
             painter->drawLine(QPointF(x, y), QPointF(x + 0.0001, y));
             break;
         }
         case ssCross:
         {
             painter->drawLine(QLineF(x - w, y - w, x + w, y + w));
             painter->drawLine(QLineF(x - w, y + w, x + w, y - w));
             break;
         }
         case ssPlus:
         {
             painter->drawLine(QLineF(x - w, y, x + w, y));
             painter->drawLine(QLineF(x, y + w, x, y - w));
             break;
         }
         case ssCircle:
         {
             painter->drawEllipse(QPointF(x, y), w, w);
             break;
         }
         case ssDisc:
         {
             QBrush b = painter->brush();
             painter->setBrush(painter->pen().color());
             painter->drawEllipse(QPointF(x, y), w, w);
             painter->setBrush(b);
             break;
         }
         case ssSquare:
         {
             painter->drawRect(QRectF(x - w, y - w, mSize, mSize));
             break;
         }
         case ssDiamond:
         {
             painter->drawLine(QLineF(x - w, y, x, y - w));
             painter->drawLine(QLineF(x, y - w, x + w, y));
             painter->drawLine(QLineF(x + w, y, x, y + w));
             painter->drawLine(QLineF(x, y + w, x - w, y));
             break;
         }
         case ssStar:
         {
             painter->drawLine(QLineF(x - w, y, x + w, y));
             painter->drawLine(QLineF(x, y + w, x, y - w));
             painter->drawLine(QLineF(x - w * 0.707, y - w * 0.707, x + w * 0.707, y + w * 0.707));
             painter->drawLine(QLineF(x - w * 0.707, y + w * 0.707, x + w * 0.707, y - w * 0.707));
             break;
         }
         case ssTriangle:
         {
             painter->drawLine(QLineF(x - w, y + 0.755 * w, x + w, y + 0.755 * w));
             painter->drawLine(QLineF(x + w, y + 0.755 * w, x, y - 0.977 * w));
             painter->drawLine(QLineF(x, y - 0.977 * w, x - w, y + 0.755 * w));
             break;
         }
         case ssTriangleInverted:
         {
             painter->drawLine(QLineF(x - w, y - 0.755 * w, x + w, y - 0.755 * w));
             painter->drawLine(QLineF(x + w, y - 0.755 * w, x, y + 0.977 * w));
             painter->drawLine(QLineF(x, y + 0.977 * w, x - w, y - 0.755 * w));
             break;
         }
         case ssCrossSquare:
         {
             painter->drawLine(QLineF(x - w, y - w, x + w * 0.95, y + w * 0.95));
             painter->drawLine(QLineF(x - w, y + w * 0.95, x + w * 0.95, y - w));
             painter->drawRect(QRectF(x - w, y - w, mSize, mSize));
             break;
         }
         case ssPlusSquare:
         {
             painter->drawLine(QLineF(x - w, y, x + w * 0.95, y));
             painter->drawLine(QLineF(x, y + w, x, y - w));
             painter->drawRect(QRectF(x - w, y - w, mSize, mSize));
             break;
         }
         case ssCrossCircle:
         {
             painter->drawLine(QLineF(x - w * 0.707, y - w * 0.707, x + w * 0.670, y + w * 0.670));
             painter->drawLine(QLineF(x - w * 0.707, y + w * 0.670, x + w * 0.670, y - w * 0.707));
             painter->drawEllipse(QPointF(x, y), w, w);
             break;
         }
         case ssPlusCircle:
         {
             painter->drawLine(QLineF(x - w, y, x + w, y));
             painter->drawLine(QLineF(x, y + w, x, y - w));
             painter->drawEllipse(QPointF(x, y), w, w);
             break;
         }
         case ssPeace:
         {
             painter->drawLine(QLineF(x, y - w, x, y + w));
             painter->drawLine(QLineF(x, y, x - w * 0.707, y + w * 0.707));
             painter->drawLine(QLineF(x, y, x + w * 0.707, y + w * 0.707));
             painter->drawEllipse(QPointF(x, y), w, w);
             break;
         }
         case ssPixmap:
         {
             const double widthHalf  = mPixmap.width() * 0.5;
             const double heightHalf = mPixmap.height() * 0.5;
 #if QT_VERSION < QT_VERSION_CHECK(4, 8, 0)
             const QRectF clipRect =
                 painter->clipRegion().boundingRect().adjusted(-widthHalf, -heightHalf, widthHalf, heightHalf);
 #else
             const QRectF clipRect =
                 painter->clipBoundingRect().adjusted(-widthHalf, -heightHalf, widthHalf, heightHalf);
 #endif
             if (clipRect.contains(x, y))
                 painter->drawPixmap(x - widthHalf, y - heightHalf, mPixmap);
             break;
         }
         case ssCustom:
         {
             QTransform oldTransform = painter->transform();
             painter->translate(x, y);
             painter->scale(mSize / 6.0, mSize / 6.0);
             painter->drawPath(mCustomPath);
             painter->setTransform(oldTransform);
             break;
         }
     }
 }
 /* end of 'src/scatterstyle.cpp' */
 
 //amalgamation: add datacontainer.cpp
 
 /* including file 'src/plottable.cpp', size 38861                            */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPSelectionDecorator
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPSelectionDecorator
   \brief Controls how a plottable's data selection is drawn
 
   Each \ref QCPAbstractPlottable instance has one \ref QCPSelectionDecorator (accessible via \ref
   QCPAbstractPlottable::selectionDecorator) and uses it when drawing selected segments of its data.
 
   The selection decorator controls both pen (\ref setPen) and brush (\ref setBrush), as well as the
   scatter style (\ref setScatterStyle) if the plottable draws scatters. Since a \ref
   QCPScatterStyle is itself composed of different properties such as color shape and size, the
   decorator allows specifying exactly which of those properties shall be used for the selected data
   point, via \ref setUsedScatterProperties.
 
   A \ref QCPSelectionDecorator subclass instance can be passed to a plottable via \ref
   QCPAbstractPlottable::setSelectionDecorator, allowing greater customizability of the appearance
   of selected segments.
 
   Use \ref copyFrom to easily transfer the settings of one decorator to another one. This is
   especially useful since plottables take ownership of the passed selection decorator, and thus the
   same decorator instance can not be passed to multiple plottables.
 
   Selection decorators can also themselves perform drawing operations by reimplementing \ref
   drawDecoration, which is called by the plottable's draw method. The base class \ref
   QCPSelectionDecorator does not make use of this however. For example, \ref
   QCPSelectionDecoratorBracket draws brackets around selected data segments.
 */
 
 /*!
   Creates a new QCPSelectionDecorator instance with default values
 */
 QCPSelectionDecorator::QCPSelectionDecorator()
     : mPen(QColor(80, 80, 255), 2.5), mBrush(Qt::NoBrush),
       mScatterStyle(QCPScatterStyle::ssNone, QPen(Qt::blue, 2), Qt::NoBrush, 6.0),
-      mUsedScatterProperties(QCPScatterStyle::spPen), mPlottable(0)
+      mUsedScatterProperties(QCPScatterStyle::spPen), mPlottable(nullptr)
 {
 }
 
 QCPSelectionDecorator::~QCPSelectionDecorator()
 {
 }
 
 /*!
   Sets the pen that will be used by the parent plottable to draw selected data segments.
 */
 void QCPSelectionDecorator::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the brush that will be used by the parent plottable to draw selected data segments.
 */
 void QCPSelectionDecorator::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   Sets the scatter style that will be used by the parent plottable to draw scatters in selected
   data segments.
 
   \a usedProperties specifies which parts of the passed \a scatterStyle will be used by the
   plottable. The used properties can also be changed via \ref setUsedScatterProperties.
 */
 void QCPSelectionDecorator::setScatterStyle(const QCPScatterStyle &scatterStyle,
                                             QCPScatterStyle::ScatterProperties usedProperties)
 {
     mScatterStyle = scatterStyle;
     setUsedScatterProperties(usedProperties);
 }
 
 /*!
   Use this method to define which properties of the scatter style (set via \ref setScatterStyle)
   will be used for selected data segments. All properties of the scatter style that are not
   specified in \a properties will remain as specified in the plottable's original scatter style.
 */
 void QCPSelectionDecorator::setUsedScatterProperties(const QCPScatterStyle::ScatterProperties &properties)
 {
     mUsedScatterProperties = properties;
 }
 
 /*!
   Sets the pen of \a painter to the pen of this selection decorator.
 
   \see applyBrush, getFinalScatterStyle
 */
 void QCPSelectionDecorator::applyPen(QCPPainter *painter) const
 {
     painter->setPen(mPen);
 }
 
 /*!
   Sets the brush of \a painter to the brush of this selection decorator.
 
   \see applyPen, getFinalScatterStyle
 */
 void QCPSelectionDecorator::applyBrush(QCPPainter *painter) const
 {
     painter->setBrush(mBrush);
 }
 
 /*!
   Returns the scatter style that the parent plottable shall use for selected scatter points. The
   plottable's original (unselected) scatter style must be passed as \a unselectedStyle. Depending
   on the setting of \ref setUsedScatterProperties, the returned scatter style is a mixture of this
   selecion decorator's scatter style (\ref setScatterStyle), and \a unselectedStyle.
 
   \see applyPen, applyBrush, setScatterStyle
 */
 QCPScatterStyle QCPSelectionDecorator::getFinalScatterStyle(const QCPScatterStyle &unselectedStyle) const
 {
     QCPScatterStyle result(unselectedStyle);
     result.setFromOther(mScatterStyle, mUsedScatterProperties);
 
     // if style shall inherit pen from plottable (has no own pen defined), give it the selected
     // plottable pen explicitly, so it doesn't use the unselected plottable pen when used in the
     // plottable:
     if (!result.isPenDefined())
         result.setPen(mPen);
 
     return result;
 }
 
 /*!
   Copies all properties (e.g. color, fill, scatter style) of the \a other selection decorator to
   this selection decorator.
 */
 void QCPSelectionDecorator::copyFrom(const QCPSelectionDecorator *other)
 {
     setPen(other->pen());
     setBrush(other->brush());
     setScatterStyle(other->scatterStyle(), other->usedScatterProperties());
 }
 
 /*!
   This method is called by all plottables' draw methods to allow custom selection decorations to be
   drawn. Use the passed \a painter to perform the drawing operations. \a selection carries the data
   selection for which the decoration shall be drawn.
 
   The default base class implementation of \ref QCPSelectionDecorator has no special decoration, so
   this method does nothing.
 */
 void QCPSelectionDecorator::drawDecoration(QCPPainter *painter, QCPDataSelection selection)
 {
     Q_UNUSED(painter)
     Q_UNUSED(selection)
 }
 
 /*! \internal
 
   This method is called as soon as a selection decorator is associated with a plottable, by a call
   to \ref QCPAbstractPlottable::setSelectionDecorator. This way the selection decorator can obtain a pointer to the plottable that uses it (e.g. to access
   data points via the \ref QCPAbstractPlottable::interface1D interface).
 
   If the selection decorator was already added to a different plottable before, this method aborts
   the registration and returns false.
 */
 bool QCPSelectionDecorator::registerWithPlottable(QCPAbstractPlottable *plottable)
 {
     if (!mPlottable)
     {
         mPlottable = plottable;
         return true;
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "This selection decorator is already registered with plottable:"
                  << reinterpret_cast<quintptr>(mPlottable);
         return false;
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAbstractPlottable
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAbstractPlottable
   \brief The abstract base class for all data representing objects in a plot.
 
   It defines a very basic interface like name, pen, brush, visibility etc. Since this class is
   abstract, it can't be instantiated. Use one of the subclasses or create a subclass yourself to
   create new ways of displaying data (see "Creating own plottables" below). Plottables that display
   one-dimensional data (i.e. data points have a single key dimension and one or multiple values at
   each key) are based off of the template subclass \ref QCPAbstractPlottable1D, see details
   there.
 
   All further specifics are in the subclasses, for example:
   \li A normal graph with possibly a line and/or scatter points \ref QCPGraph
   (typically created with \ref QCustomPlot::addGraph)
   \li A parametric curve: \ref QCPCurve
   \li A bar chart: \ref QCPBars
   \li A statistical box plot: \ref QCPStatisticalBox
   \li A color encoded two-dimensional map: \ref QCPColorMap
   \li An OHLC/Candlestick chart: \ref QCPFinancial
 
   \section plottables-subclassing Creating own plottables
 
   Subclassing directly from QCPAbstractPlottable is only recommended if you wish to display
   two-dimensional data like \ref QCPColorMap, i.e. two logical key dimensions and one (or more)
   data dimensions. If you want to display data with only one logical key dimension, you should
   rather derive from \ref QCPAbstractPlottable1D.
 
   If subclassing QCPAbstractPlottable directly, these are the pure virtual functions you must
   implement:
   \li \ref selectTest
   \li \ref draw
   \li \ref drawLegendIcon
   \li \ref getKeyRange
   \li \ref getValueRange
 
   See the documentation of those functions for what they need to do.
 
   For drawing your plot, you can use the \ref coordsToPixels functions to translate a point in plot
   coordinates to pixel coordinates. This function is quite convenient, because it takes the
   orientation of the key and value axes into account for you (x and y are swapped when the key axis
   is vertical and the value axis horizontal). If you are worried about performance (i.e. you need
   to translate many points in a loop like QCPGraph), you can directly use \ref
   QCPAxis::coordToPixel. However, you must then take care about the orientation of the axis
   yourself.
 
   Here are some important members you inherit from QCPAbstractPlottable:
   <table>
   <tr>
     <td>QCustomPlot *\b mParentPlot</td>
     <td>A pointer to the parent QCustomPlot instance. The parent plot is inferred from the axes that are passed in the constructor.</td>
   </tr><tr>
     <td>QString \b mName</td>
     <td>The name of the plottable.</td>
   </tr><tr>
     <td>QPen \b mPen</td>
     <td>The generic pen of the plottable. You should use this pen for the most prominent data representing lines in the plottable
         (e.g QCPGraph uses this pen for its graph lines and scatters)</td>
   </tr><tr>
     <td>QBrush \b mBrush</td>
     <td>The generic brush of the plottable. You should use this brush for the most prominent fillable structures in the plottable
         (e.g. QCPGraph uses this brush to control filling under the graph)</td>
   </tr><tr>
     <td>QPointer<\ref QCPAxis> \b mKeyAxis, \b mValueAxis</td>
     <td>The key and value axes this plottable is attached to. Call their QCPAxis::coordToPixel functions to translate coordinates
         to pixels in either the key or value dimension. Make sure to check whether the pointer is null before using it. If one of
         the axes is null, don't draw the plottable.</td>
   </tr><tr>
     <td>\ref QCPSelectionDecorator \b mSelectionDecorator</td>
     <td>The currently set selection decorator which specifies how selected data of the plottable shall be drawn and decorated.
         When drawing your data, you must consult this decorator for the appropriate pen/brush before drawing unselected/selected data segments.
         Finally, you should call its \ref QCPSelectionDecorator::drawDecoration method at the end of your \ref draw implementation.</td>
   </tr><tr>
     <td>\ref QCP::SelectionType \b mSelectable</td>
     <td>In which composition, if at all, this plottable's data may be selected. Enforcing this setting on the data selection is done
         by QCPAbstractPlottable automatically.</td>
   </tr><tr>
     <td>\ref QCPDataSelection \b mSelection</td>
     <td>Holds the current selection state of the plottable's data, i.e. the selected data ranges (\ref QCPDataRange).</td>
   </tr>
   </table>
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QCPSelectionDecorator *QCPAbstractPlottable::selectionDecorator() const
 
   Provides access to the selection decorator of this plottable. The selection decorator controls
   how selected data ranges are drawn (e.g. their pen color and fill), see \ref
   QCPSelectionDecorator for details.
 
   If you wish to use an own \ref QCPSelectionDecorator subclass, pass an instance of it to \ref
   setSelectionDecorator.
 */
 
 /*! \fn bool QCPAbstractPlottable::selected() const
 
   Returns true if there are any data points of the plottable currently selected. Use \ref selection
   to retrieve the current \ref QCPDataSelection.
 */
 
 /*! \fn QCPDataSelection QCPAbstractPlottable::selection() const
 
   Returns a \ref QCPDataSelection encompassing all the data points that are currently selected on
   this plottable.
 
   \see selected, setSelection, setSelectable
 */
 
 /*! \fn virtual QCPPlottableInterface1D *QCPAbstractPlottable::interface1D()
 
   If this plottable is a one-dimensional plottable, i.e. it implements the \ref
   QCPPlottableInterface1D, returns the \a this pointer with that type. Otherwise (e.g. in the case
   of a \ref QCPColorMap) returns zero.
 
   You can use this method to gain read access to data coordinates while holding a pointer to the
   abstract base class only.
 */
 
 /* end of documentation of inline functions */
 /* start of documentation of pure virtual functions */
 
 /*! \fn void QCPAbstractPlottable::drawLegendIcon(QCPPainter *painter, const QRect &rect) const = 0
   \internal
 
   called by QCPLegend::draw (via QCPPlottableLegendItem::draw) to create a graphical representation
   of this plottable inside \a rect, next to the plottable name.
 
   The passed \a painter has its cliprect set to \a rect, so painting outside of \a rect won't
   appear outside the legend icon border.
 */
 
 /*! \fn QCPRange QCPAbstractPlottable::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const = 0
 
   Returns the coordinate range that all data in this plottable span in the key axis dimension. For
   logarithmic plots, one can set \a inSignDomain to either \ref QCP::sdNegative or \ref
   QCP::sdPositive in order to restrict the returned range to that sign domain. E.g. when only
   negative range is wanted, set \a inSignDomain to \ref QCP::sdNegative and all positive points
   will be ignored for range calculation. For no restriction, just set \a inSignDomain to \ref
   QCP::sdBoth (default). \a foundRange is an output parameter that indicates whether a range could
   be found or not. If this is false, you shouldn't use the returned range (e.g. no points in data).
 
   Note that \a foundRange is not the same as \ref QCPRange::validRange, since the range returned by
   this function may have size zero (e.g. when there is only one data point). In this case \a
   foundRange would return true, but the returned range is not a valid range in terms of \ref
   QCPRange::validRange.
 
   \see rescaleAxes, getValueRange
 */
 
 /*! \fn QCPRange QCPAbstractPlottable::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain, const QCPRange &inKeyRange) const = 0
 
   Returns the coordinate range that the data points in the specified key range (\a inKeyRange) span
   in the value axis dimension. For logarithmic plots, one can set \a inSignDomain to either \ref
   QCP::sdNegative or \ref QCP::sdPositive in order to restrict the returned range to that sign
   domain. E.g. when only negative range is wanted, set \a inSignDomain to \ref QCP::sdNegative and
   all positive points will be ignored for range calculation. For no restriction, just set \a
   inSignDomain to \ref QCP::sdBoth (default). \a foundRange is an output parameter that indicates
   whether a range could be found or not. If this is false, you shouldn't use the returned range
   (e.g. no points in data).
 
   If \a inKeyRange has both lower and upper bound set to zero (is equal to <tt>QCPRange()</tt>),
   all data points are considered, without any restriction on the keys.
 
   Note that \a foundRange is not the same as \ref QCPRange::validRange, since the range returned by
   this function may have size zero (e.g. when there is only one data point). In this case \a
   foundRange would return true, but the returned range is not a valid range in terms of \ref
   QCPRange::validRange.
 
   \see rescaleAxes, getKeyRange
 */
 
 /* end of documentation of pure virtual functions */
 /* start of documentation of signals */
 
 /*! \fn void QCPAbstractPlottable::selectionChanged(bool selected)
 
   This signal is emitted when the selection state of this plottable has changed, either by user
   interaction or by a direct call to \ref setSelection. The parameter \a selected indicates whether
   there are any points selected or not.
 
   \see selectionChanged(const QCPDataSelection &selection)
 */
 
 /*! \fn void QCPAbstractPlottable::selectionChanged(const QCPDataSelection &selection)
 
   This signal is emitted when the selection state of this plottable has changed, either by user
   interaction or by a direct call to \ref setSelection. The parameter \a selection holds the
   currently selected data ranges.
 
   \see selectionChanged(bool selected)
 */
 
 /*! \fn void QCPAbstractPlottable::selectableChanged(QCP::SelectionType selectable);
 
   This signal is emitted when the selectability of this plottable has changed.
 
   \see setSelectable
 */
 
 /* end of documentation of signals */
 
 /*!
   Constructs an abstract plottable which uses \a keyAxis as its key axis ("x") and \a valueAxis as
   its value axis ("y"). \a keyAxis and \a valueAxis must reside in the same QCustomPlot instance
   and have perpendicular orientations. If either of these restrictions is violated, a corresponding
   message is printed to the debug output (qDebug), the construction is not aborted, though.
 
   Since QCPAbstractPlottable is an abstract class that defines the basic interface to plottables,
   it can't be directly instantiated.
 
   You probably want one of the subclasses like \ref QCPGraph or \ref QCPCurve instead.
 */
 QCPAbstractPlottable::QCPAbstractPlottable(QCPAxis *keyAxis, QCPAxis *valueAxis)
     : QCPLayerable(keyAxis->parentPlot(), QString(), keyAxis->axisRect()), mName(), mAntialiasedFill(true),
       mAntialiasedScatters(true), mPen(Qt::black), mBrush(Qt::NoBrush), mKeyAxis(keyAxis), mValueAxis(valueAxis),
-      mSelectable(QCP::stWhole), mSelectionDecorator(0)
+      mSelectable(QCP::stWhole), mSelectionDecorator(nullptr)
 {
     if (keyAxis->parentPlot() != valueAxis->parentPlot())
         qDebug() << Q_FUNC_INFO << "Parent plot of keyAxis is not the same as that of valueAxis.";
     if (keyAxis->orientation() == valueAxis->orientation())
         qDebug() << Q_FUNC_INFO << "keyAxis and valueAxis must be orthogonal to each other.";
 
     mParentPlot->registerPlottable(this);
     setSelectionDecorator(new QCPSelectionDecorator);
 }
 
 QCPAbstractPlottable::~QCPAbstractPlottable()
 {
     if (mSelectionDecorator)
     {
         delete mSelectionDecorator;
-        mSelectionDecorator = 0;
+        mSelectionDecorator = nullptr;
     }
 }
 
 /*!
    The name is the textual representation of this plottable as it is displayed in the legend
    (\ref QCPLegend). It may contain any UTF-8 characters, including newlines.
 */
 void QCPAbstractPlottable::setName(const QString &name)
 {
     mName = name;
 }
 
 /*!
   Sets whether fills of this plottable are drawn antialiased or not.
 
   Note that this setting may be overridden by \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 */
 void QCPAbstractPlottable::setAntialiasedFill(bool enabled)
 {
     mAntialiasedFill = enabled;
 }
 
 /*!
   Sets whether the scatter symbols of this plottable are drawn antialiased or not.
 
   Note that this setting may be overridden by \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 */
 void QCPAbstractPlottable::setAntialiasedScatters(bool enabled)
 {
     mAntialiasedScatters = enabled;
 }
 
 /*!
   The pen is used to draw basic lines that make up the plottable representation in the
   plot.
 
   For example, the \ref QCPGraph subclass draws its graph lines with this pen.
 
   \see setBrush
 */
 void QCPAbstractPlottable::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   The brush is used to draw basic fills of the plottable representation in the
   plot. The Fill can be a color, gradient or texture, see the usage of QBrush.
 
   For example, the \ref QCPGraph subclass draws the fill under the graph with this brush, when
   it's not set to Qt::NoBrush.
 
   \see setPen
 */
 void QCPAbstractPlottable::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   The key axis of a plottable can be set to any axis of a QCustomPlot, as long as it is orthogonal
   to the plottable's value axis. This function performs no checks to make sure this is the case.
   The typical mathematical choice is to use the x-axis (QCustomPlot::xAxis) as key axis and the
   y-axis (QCustomPlot::yAxis) as value axis.
 
   Normally, the key and value axes are set in the constructor of the plottable (or \ref
   QCustomPlot::addGraph when working with QCPGraphs through the dedicated graph interface).
 
   \see setValueAxis
 */
 void QCPAbstractPlottable::setKeyAxis(QCPAxis *axis)
 {
     mKeyAxis = axis;
 }
 
 /*!
   The value axis of a plottable can be set to any axis of a QCustomPlot, as long as it is
   orthogonal to the plottable's key axis. This function performs no checks to make sure this is the
   case. The typical mathematical choice is to use the x-axis (QCustomPlot::xAxis) as key axis and
   the y-axis (QCustomPlot::yAxis) as value axis.
 
   Normally, the key and value axes are set in the constructor of the plottable (or \ref
   QCustomPlot::addGraph when working with QCPGraphs through the dedicated graph interface).
 
   \see setKeyAxis
 */
 void QCPAbstractPlottable::setValueAxis(QCPAxis *axis)
 {
     mValueAxis = axis;
 }
 
 /*!
   Sets which data ranges of this plottable are selected. Selected data ranges are drawn differently
   (e.g. color) in the plot. This can be controlled via the selection decorator (see \ref
   selectionDecorator).
 
   The entire selection mechanism for plottables is handled automatically when \ref
   QCustomPlot::setInteractions contains iSelectPlottables. You only need to call this function when
   you wish to change the selection state programmatically.
 
   Using \ref setSelectable you can further specify for each plottable whether and to which
   granularity it is selectable. If \a selection is not compatible with the current \ref
   QCP::SelectionType set via \ref setSelectable, the resulting selection will be adjusted
   accordingly (see \ref QCPDataSelection::enforceType).
 
   emits the \ref selectionChanged signal when \a selected is different from the previous selection state.
 
   \see setSelectable, selectTest
 */
 void QCPAbstractPlottable::setSelection(QCPDataSelection selection)
 {
     selection.enforceType(mSelectable);
     if (mSelection != selection)
     {
         mSelection = selection;
         emit selectionChanged(selected());
         emit selectionChanged(mSelection);
     }
 }
 
 /*!
   Use this method to set an own QCPSelectionDecorator (subclass) instance. This allows you to
   customize the visual representation of selected data ranges further than by using the default
   QCPSelectionDecorator.
 
   The plottable takes ownership of the \a decorator.
 
   The currently set decorator can be accessed via \ref selectionDecorator.
 */
 void QCPAbstractPlottable::setSelectionDecorator(QCPSelectionDecorator *decorator)
 {
     if (decorator)
     {
         if (decorator->registerWithPlottable(this))
         {
             if (mSelectionDecorator) // delete old decorator if necessary
                 delete mSelectionDecorator;
             mSelectionDecorator = decorator;
         }
     }
     else if (mSelectionDecorator) // just clear decorator
     {
         delete mSelectionDecorator;
-        mSelectionDecorator = 0;
+        mSelectionDecorator = nullptr;
     }
 }
 
 /*!
   Sets whether and to which granularity this plottable can be selected.
 
   A selection can happen by clicking on the QCustomPlot surface (When \ref
   QCustomPlot::setInteractions contains \ref QCP::iSelectPlottables), by dragging a selection rect
   (When \ref QCustomPlot::setSelectionRectMode is \ref QCP::srmSelect), or programmatically by
   calling \ref setSelection.
 
   \see setSelection, QCP::SelectionType
 */
 void QCPAbstractPlottable::setSelectable(QCP::SelectionType selectable)
 {
     if (mSelectable != selectable)
     {
         mSelectable                   = selectable;
         QCPDataSelection oldSelection = mSelection;
         mSelection.enforceType(mSelectable);
         emit selectableChanged(mSelectable);
         if (mSelection != oldSelection)
         {
             emit selectionChanged(selected());
             emit selectionChanged(mSelection);
         }
     }
 }
 
 /*!
   Convenience function for transforming a key/value pair to pixels on the QCustomPlot surface,
   taking the orientations of the axes associated with this plottable into account (e.g. whether key
   represents x or y).
 
   \a key and \a value are transformed to the coodinates in pixels and are written to \a x and \a y.
 
   \see pixelsToCoords, QCPAxis::coordToPixel
 */
 void QCPAbstractPlottable::coordsToPixels(double key, double value, double &x, double &y) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         x = keyAxis->coordToPixel(key);
         y = valueAxis->coordToPixel(value);
     }
     else
     {
         y = keyAxis->coordToPixel(key);
         x = valueAxis->coordToPixel(value);
     }
 }
 
 /*! \overload
 
   Transforms the given \a key and \a value to pixel coordinates and returns them in a QPointF.
 */
 const QPointF QCPAbstractPlottable::coordsToPixels(double key, double value) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return QPointF();
     }
 
     if (keyAxis->orientation() == Qt::Horizontal)
         return QPointF(keyAxis->coordToPixel(key), valueAxis->coordToPixel(value));
     else
         return QPointF(valueAxis->coordToPixel(value), keyAxis->coordToPixel(key));
 }
 
 /*!
   Convenience function for transforming a x/y pixel pair on the QCustomPlot surface to plot coordinates,
   taking the orientations of the axes associated with this plottable into account (e.g. whether key
   represents x or y).
 
   \a x and \a y are transformed to the plot coodinates and are written to \a key and \a value.
 
   \see coordsToPixels, QCPAxis::coordToPixel
 */
 void QCPAbstractPlottable::pixelsToCoords(double x, double y, double &key, double &value) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         key   = keyAxis->pixelToCoord(x);
         value = valueAxis->pixelToCoord(y);
     }
     else
     {
         key   = keyAxis->pixelToCoord(y);
         value = valueAxis->pixelToCoord(x);
     }
 }
 
 /*! \overload
 
   Returns the pixel input \a pixelPos as plot coordinates \a key and \a value.
 */
 void QCPAbstractPlottable::pixelsToCoords(const QPointF &pixelPos, double &key, double &value) const
 {
     pixelsToCoords(pixelPos.x(), pixelPos.y(), key, value);
 }
 
 /*!
   Rescales the key and value axes associated with this plottable to contain all displayed data, so
   the whole plottable is visible. If the scaling of an axis is logarithmic, rescaleAxes will make
   sure not to rescale to an illegal range i.e. a range containing different signs and/or zero.
   Instead it will stay in the current sign domain and ignore all parts of the plottable that lie
   outside of that domain.
 
   \a onlyEnlarge makes sure the ranges are only expanded, never reduced. So it's possible to show
   multiple plottables in their entirety by multiple calls to rescaleAxes where the first call has
   \a onlyEnlarge set to false (the default), and all subsequent set to true.
 
   \see rescaleKeyAxis, rescaleValueAxis, QCustomPlot::rescaleAxes, QCPAxis::rescale
 */
 void QCPAbstractPlottable::rescaleAxes(bool onlyEnlarge) const
 {
     rescaleKeyAxis(onlyEnlarge);
     rescaleValueAxis(onlyEnlarge);
 }
 
 /*!
   Rescales the key axis of the plottable so the whole plottable is visible.
 
   See \ref rescaleAxes for detailed behaviour.
 */
 void QCPAbstractPlottable::rescaleKeyAxis(bool onlyEnlarge) const
 {
     QCPAxis *keyAxis = mKeyAxis.data();
     if (!keyAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key axis";
         return;
     }
 
     QCP::SignDomain signDomain = QCP::sdBoth;
     if (keyAxis->scaleType() == QCPAxis::stLogarithmic)
         signDomain = (keyAxis->range().upper < 0 ? QCP::sdNegative : QCP::sdPositive);
 
     bool foundRange;
     QCPRange newRange = getKeyRange(foundRange, signDomain);
     if (foundRange)
     {
         if (onlyEnlarge)
             newRange.expand(keyAxis->range());
         if (!QCPRange::validRange(
                 newRange)) // likely due to range being zero (plottable has only constant data in this axis dimension), shift current range to at least center the plottable
         {
             double center =
                 (newRange.lower + newRange.upper) *
                 0.5; // upper and lower should be equal anyway, but just to make sure, incase validRange returned false for other reason
             if (keyAxis->scaleType() == QCPAxis::stLinear)
             {
                 newRange.lower = center - keyAxis->range().size() / 2.0;
                 newRange.upper = center + keyAxis->range().size() / 2.0;
             }
             else // scaleType() == stLogarithmic
             {
                 newRange.lower = center / qSqrt(keyAxis->range().upper / keyAxis->range().lower);
                 newRange.upper = center * qSqrt(keyAxis->range().upper / keyAxis->range().lower);
             }
         }
         keyAxis->setRange(newRange);
     }
 }
 
 /*!
   Rescales the value axis of the plottable so the whole plottable is visible. If \a inKeyRange is
   set to true, only the data points which are in the currently visible key axis range are
   considered.
 
   Returns true if the axis was actually scaled. This might not be the case if this plottable has an
   invalid range, e.g. because it has no data points.
 
   See \ref rescaleAxes for detailed behaviour.
 */
 void QCPAbstractPlottable::rescaleValueAxis(bool onlyEnlarge, bool inKeyRange) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     QCP::SignDomain signDomain = QCP::sdBoth;
     if (valueAxis->scaleType() == QCPAxis::stLogarithmic)
         signDomain = (valueAxis->range().upper < 0 ? QCP::sdNegative : QCP::sdPositive);
 
     bool foundRange;
     QCPRange newRange = getValueRange(foundRange, signDomain, inKeyRange ? keyAxis->range() : QCPRange());
     if (foundRange)
     {
         if (onlyEnlarge)
             newRange.expand(valueAxis->range());
         if (!QCPRange::validRange(
                 newRange)) // likely due to range being zero (plottable has only constant data in this axis dimension), shift current range to at least center the plottable
         {
             double center =
                 (newRange.lower + newRange.upper) *
                 0.5; // upper and lower should be equal anyway, but just to make sure, incase validRange returned false for other reason
             if (valueAxis->scaleType() == QCPAxis::stLinear)
             {
                 newRange.lower = center - valueAxis->range().size() / 2.0;
                 newRange.upper = center + valueAxis->range().size() / 2.0;
             }
             else // scaleType() == stLogarithmic
             {
                 newRange.lower = center / qSqrt(valueAxis->range().upper / valueAxis->range().lower);
                 newRange.upper = center * qSqrt(valueAxis->range().upper / valueAxis->range().lower);
             }
         }
         valueAxis->setRange(newRange);
     }
 }
 
 /*! \overload
 
   Adds this plottable to the specified \a legend.
 
   Creates a QCPPlottableLegendItem which is inserted into the legend. Returns true on success, i.e.
   when the legend exists and a legend item associated with this plottable isn't already in the
   legend.
 
   If the plottable needs a more specialized representation in the legend, you can create a
   corresponding subclass of \ref QCPPlottableLegendItem and add it to the legend manually instead
   of calling this method.
 
   \see removeFromLegend, QCPLegend::addItem
 */
 bool QCPAbstractPlottable::addToLegend(QCPLegend *legend)
 {
     if (!legend)
     {
         qDebug() << Q_FUNC_INFO << "passed legend is null";
         return false;
     }
     if (legend->parentPlot() != mParentPlot)
     {
         qDebug() << Q_FUNC_INFO << "passed legend isn't in the same QCustomPlot as this plottable";
         return false;
     }
 
     if (!legend->hasItemWithPlottable(this))
     {
         legend->addItem(new QCPPlottableLegendItem(legend, this));
         return true;
     }
     else
         return false;
 }
 
 /*! \overload
 
   Adds this plottable to the legend of the parent QCustomPlot (\ref QCustomPlot::legend).
 
   \see removeFromLegend
 */
 bool QCPAbstractPlottable::addToLegend()
 {
     if (!mParentPlot || !mParentPlot->legend)
         return false;
     else
         return addToLegend(mParentPlot->legend);
 }
 
 /*! \overload
 
   Removes the plottable from the specifed \a legend. This means the \ref QCPPlottableLegendItem
   that is associated with this plottable is removed.
 
   Returns true on success, i.e. if the legend exists and a legend item associated with this
   plottable was found and removed.
 
   \see addToLegend, QCPLegend::removeItem
 */
 bool QCPAbstractPlottable::removeFromLegend(QCPLegend *legend) const
 {
     if (!legend)
     {
         qDebug() << Q_FUNC_INFO << "passed legend is null";
         return false;
     }
 
     if (QCPPlottableLegendItem *lip = legend->itemWithPlottable(this))
         return legend->removeItem(lip);
     else
         return false;
 }
 
 /*! \overload
 
   Removes the plottable from the legend of the parent QCustomPlot.
 
   \see addToLegend
 */
 bool QCPAbstractPlottable::removeFromLegend() const
 {
     if (!mParentPlot || !mParentPlot->legend)
         return false;
     else
         return removeFromLegend(mParentPlot->legend);
 }
 
 /* inherits documentation from base class */
 QRect QCPAbstractPlottable::clipRect() const
 {
     if (mKeyAxis && mValueAxis)
         return mKeyAxis.data()->axisRect()->rect() & mValueAxis.data()->axisRect()->rect();
     else
         return QRect();
 }
 
 /* inherits documentation from base class */
 QCP::Interaction QCPAbstractPlottable::selectionCategory() const
 {
     return QCP::iSelectPlottables;
 }
 
 /*! \internal
 
   A convenience function to easily set the QPainter::Antialiased hint on the provided \a painter
   before drawing plottable lines.
 
   This is the antialiasing state the painter passed to the \ref draw method is in by default.
 
   This function takes into account the local setting of the antialiasing flag as well as the
   overrides set with \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 
   \seebaseclassmethod
 
   \see setAntialiased, applyFillAntialiasingHint, applyScattersAntialiasingHint
 */
 void QCPAbstractPlottable::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aePlottables);
 }
 
 /*! \internal
 
   A convenience function to easily set the QPainter::Antialiased hint on the provided \a painter
   before drawing plottable fills.
 
   This function takes into account the local setting of the antialiasing flag as well as the
   overrides set with \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 
   \see setAntialiased, applyDefaultAntialiasingHint, applyScattersAntialiasingHint
 */
 void QCPAbstractPlottable::applyFillAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiasedFill, QCP::aeFills);
 }
 
 /*! \internal
 
   A convenience function to easily set the QPainter::Antialiased hint on the provided \a painter
   before drawing plottable scatter points.
 
   This function takes into account the local setting of the antialiasing flag as well as the
   overrides set with \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 
   \see setAntialiased, applyFillAntialiasingHint, applyDefaultAntialiasingHint
 */
 void QCPAbstractPlottable::applyScattersAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiasedScatters, QCP::aeScatters);
 }
 
 /* inherits documentation from base class */
 void QCPAbstractPlottable::selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                                        bool *selectionStateChanged)
 {
     Q_UNUSED(event)
 
     if (mSelectable != QCP::stNone)
     {
         QCPDataSelection newSelection    = details.value<QCPDataSelection>();
         QCPDataSelection selectionBefore = mSelection;
         if (additive)
         {
             if (mSelectable ==
                 QCP::
                     stWhole) // in whole selection mode, we toggle to no selection even if currently unselected point was hit
             {
                 if (selected())
                     setSelection(QCPDataSelection());
                 else
                     setSelection(newSelection);
             }
             else // in all other selection modes we toggle selections of homogeneously selected/unselected segments
             {
                 if (mSelection.contains(newSelection)) // if entire newSelection is already selected, toggle selection
                     setSelection(mSelection - newSelection);
                 else
                     setSelection(mSelection + newSelection);
             }
         }
         else
             setSelection(newSelection);
         if (selectionStateChanged)
             *selectionStateChanged = mSelection != selectionBefore;
     }
 }
 
 /* inherits documentation from base class */
 void QCPAbstractPlottable::deselectEvent(bool *selectionStateChanged)
 {
     if (mSelectable != QCP::stNone)
     {
         QCPDataSelection selectionBefore = mSelection;
         setSelection(QCPDataSelection());
         if (selectionStateChanged)
             *selectionStateChanged = mSelection != selectionBefore;
     }
 }
 /* end of 'src/plottable.cpp' */
 
 /* including file 'src/item.cpp', size 49269                                 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemAnchor
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemAnchor
   \brief An anchor of an item to which positions can be attached to.
 
   An item (QCPAbstractItem) may have one or more anchors. Unlike QCPItemPosition, an anchor doesn't
   control anything on its item, but provides a way to tie other items via their positions to the
   anchor.
 
   For example, a QCPItemRect is defined by its positions \a topLeft and \a bottomRight.
   Additionally it has various anchors like \a top, \a topRight or \a bottomLeft etc. So you can
   attach the \a start (which is a QCPItemPosition) of a QCPItemLine to one of the anchors by
   calling QCPItemPosition::setParentAnchor on \a start, passing the wanted anchor of the
   QCPItemRect. This way the start of the line will now always follow the respective anchor location
   on the rect item.
 
   Note that QCPItemPosition derives from QCPItemAnchor, so every position can also serve as an
   anchor to other positions.
 
   To learn how to provide anchors in your own item subclasses, see the subclassing section of the
   QCPAbstractItem documentation.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn virtual QCPItemPosition *QCPItemAnchor::toQCPItemPosition()
 
   Returns 0 if this instance is merely a QCPItemAnchor, and a valid pointer of type QCPItemPosition* if
   it actually is a QCPItemPosition (which is a subclass of QCPItemAnchor).
 
   This safe downcast functionality could also be achieved with a dynamic_cast. However, QCustomPlot avoids
   dynamic_cast to work with projects that don't have RTTI support enabled (e.g. -fno-rtti flag with
   gcc compiler).
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a new QCPItemAnchor. You shouldn't create QCPItemAnchor instances directly, even if
   you want to make a new item subclass. Use \ref QCPAbstractItem::createAnchor instead, as
   explained in the subclassing section of the QCPAbstractItem documentation.
 */
 QCPItemAnchor::QCPItemAnchor(QCustomPlot *parentPlot, QCPAbstractItem *parentItem, const QString &name, int anchorId)
     : mName(name), mParentPlot(parentPlot), mParentItem(parentItem), mAnchorId(anchorId)
 {
 }
 
 QCPItemAnchor::~QCPItemAnchor()
 {
     // unregister as parent at children:
     foreach (QCPItemPosition *child, mChildrenX.toList())
     {
         if (child->parentAnchorX() == this)
-            child->setParentAnchorX(0); // this acts back on this anchor and child removes itself from mChildrenX
+            child->setParentAnchorX(nullptr); // this acts back on this anchor and child removes itself from mChildrenX
     }
     foreach (QCPItemPosition *child, mChildrenY.toList())
     {
         if (child->parentAnchorY() == this)
-            child->setParentAnchorY(0); // this acts back on this anchor and child removes itself from mChildrenY
+            child->setParentAnchorY(nullptr); // this acts back on this anchor and child removes itself from mChildrenY
     }
 }
 
 /*!
   Returns the final absolute pixel position of the QCPItemAnchor on the QCustomPlot surface.
 
   The pixel information is internally retrieved via QCPAbstractItem::anchorPixelPosition of the
   parent item, QCPItemAnchor is just an intermediary.
 */
 QPointF QCPItemAnchor::pixelPosition() const
 {
     if (mParentItem)
     {
         if (mAnchorId > -1)
         {
             return mParentItem->anchorPixelPosition(mAnchorId);
         }
         else
         {
             qDebug() << Q_FUNC_INFO << "no valid anchor id set:" << mAnchorId;
             return QPointF();
         }
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "no parent item set";
         return QPointF();
     }
 }
 
 /*! \internal
 
   Adds \a pos to the childX list of this anchor, which keeps track of which children use this
   anchor as parent anchor for the respective coordinate. This is necessary to notify the children
   prior to destruction of the anchor.
 
   Note that this function does not change the parent setting in \a pos.
 */
 void QCPItemAnchor::addChildX(QCPItemPosition *pos)
 {
     if (!mChildrenX.contains(pos))
         mChildrenX.insert(pos);
     else
         qDebug() << Q_FUNC_INFO << "provided pos is child already" << reinterpret_cast<quintptr>(pos);
 }
 
 /*! \internal
 
   Removes \a pos from the childX list of this anchor.
 
   Note that this function does not change the parent setting in \a pos.
 */
 void QCPItemAnchor::removeChildX(QCPItemPosition *pos)
 {
     if (!mChildrenX.remove(pos))
         qDebug() << Q_FUNC_INFO << "provided pos isn't child" << reinterpret_cast<quintptr>(pos);
 }
 
 /*! \internal
 
   Adds \a pos to the childY list of this anchor, which keeps track of which children use this
   anchor as parent anchor for the respective coordinate. This is necessary to notify the children
   prior to destruction of the anchor.
 
   Note that this function does not change the parent setting in \a pos.
 */
 void QCPItemAnchor::addChildY(QCPItemPosition *pos)
 {
     if (!mChildrenY.contains(pos))
         mChildrenY.insert(pos);
     else
         qDebug() << Q_FUNC_INFO << "provided pos is child already" << reinterpret_cast<quintptr>(pos);
 }
 
 /*! \internal
 
   Removes \a pos from the childY list of this anchor.
 
   Note that this function does not change the parent setting in \a pos.
 */
 void QCPItemAnchor::removeChildY(QCPItemPosition *pos)
 {
     if (!mChildrenY.remove(pos))
         qDebug() << Q_FUNC_INFO << "provided pos isn't child" << reinterpret_cast<quintptr>(pos);
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemPosition
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemPosition
   \brief Manages the position of an item.
 
   Every item has at least one public QCPItemPosition member pointer which provides ways to position the
   item on the QCustomPlot surface. Some items have multiple positions, for example QCPItemRect has two:
   \a topLeft and \a bottomRight.
 
   QCPItemPosition has a type (\ref PositionType) that can be set with \ref setType. This type
   defines how coordinates passed to \ref setCoords are to be interpreted, e.g. as absolute pixel
   coordinates, as plot coordinates of certain axes, etc. For more advanced plots it is also
   possible to assign different types per X/Y coordinate of the position (see \ref setTypeX, \ref
   setTypeY). This way an item could be positioned at a fixed pixel distance from the top in the Y
   direction, while following a plot coordinate in the X direction.
 
   A QCPItemPosition may have a parent QCPItemAnchor, see \ref setParentAnchor. This way you can tie
   multiple items together. If the QCPItemPosition has a parent, its coordinates (\ref setCoords)
   are considered to be absolute pixels in the reference frame of the parent anchor, where (0, 0)
   means directly ontop of the parent anchor. For example, You could attach the \a start position of
   a QCPItemLine to the \a bottom anchor of a QCPItemText to make the starting point of the line
   always be centered under the text label, no matter where the text is moved to. For more advanced
   plots, it is possible to assign different parent anchors per X/Y coordinate of the position, see
   \ref setParentAnchorX, \ref setParentAnchorY. This way an item could follow another item in the X
   direction but stay at a fixed position in the Y direction. Or even follow item A in X, and item B
   in Y.
 
   Note that every QCPItemPosition inherits from QCPItemAnchor and thus can itself be used as parent
   anchor for other positions.
 
   To set the apparent pixel position on the QCustomPlot surface directly, use \ref setPixelPosition. This
   works no matter what type this QCPItemPosition is or what parent-child situation it is in, as \ref
   setPixelPosition transforms the coordinates appropriately, to make the position appear at the specified
   pixel values.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QCPItemPosition::PositionType *QCPItemPosition::type() const
 
   Returns the current position type.
 
   If different types were set for X and Y (\ref setTypeX, \ref setTypeY), this method returns the
   type of the X coordinate. In that case rather use \a typeX() and \a typeY().
 
   \see setType
 */
 
 /*! \fn QCPItemAnchor *QCPItemPosition::parentAnchor() const
 
   Returns the current parent anchor.
 
   If different parent anchors were set for X and Y (\ref setParentAnchorX, \ref setParentAnchorY),
   this method returns the parent anchor of the Y coordinate. In that case rather use \a
   parentAnchorX() and \a parentAnchorY().
 
   \see setParentAnchor
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a new QCPItemPosition. You shouldn't create QCPItemPosition instances directly, even if
   you want to make a new item subclass. Use \ref QCPAbstractItem::createPosition instead, as
   explained in the subclassing section of the QCPAbstractItem documentation.
 */
 QCPItemPosition::QCPItemPosition(QCustomPlot *parentPlot, QCPAbstractItem *parentItem, const QString &name)
     : QCPItemAnchor(parentPlot, parentItem, name), mPositionTypeX(ptAbsolute), mPositionTypeY(ptAbsolute), mKey(0),
-      mValue(0), mParentAnchorX(0), mParentAnchorY(0)
+      mValue(0), mParentAnchorX(nullptr), mParentAnchorY(nullptr)
 {
 }
 
 QCPItemPosition::~QCPItemPosition()
 {
     // unregister as parent at children:
     // Note: this is done in ~QCPItemAnchor again, but it's important QCPItemPosition does it itself, because only then
     //       the setParentAnchor(0) call the correct QCPItemPosition::pixelPosition function instead of QCPItemAnchor::pixelPosition
     foreach (QCPItemPosition *child, mChildrenX.toList())
     {
         if (child->parentAnchorX() == this)
-            child->setParentAnchorX(0); // this acts back on this anchor and child removes itself from mChildrenX
+            child->setParentAnchorX(nullptr); // this acts back on this anchor and child removes itself from mChildrenX
     }
     foreach (QCPItemPosition *child, mChildrenY.toList())
     {
         if (child->parentAnchorY() == this)
-            child->setParentAnchorY(0); // this acts back on this anchor and child removes itself from mChildrenY
+            child->setParentAnchorY(nullptr); // this acts back on this anchor and child removes itself from mChildrenY
     }
     // unregister as child in parent:
     if (mParentAnchorX)
         mParentAnchorX->removeChildX(this);
     if (mParentAnchorY)
         mParentAnchorY->removeChildY(this);
 }
 
 /* can't make this a header inline function, because QPointer breaks with forward declared types, see QTBUG-29588 */
 QCPAxisRect *QCPItemPosition::axisRect() const
 {
     return mAxisRect.data();
 }
 
 /*!
   Sets the type of the position. The type defines how the coordinates passed to \ref setCoords
   should be handled and how the QCPItemPosition should behave in the plot.
 
   The possible values for \a type can be separated in two main categories:
 
   \li The position is regarded as a point in plot coordinates. This corresponds to \ref ptPlotCoords
   and requires two axes that define the plot coordinate system. They can be specified with \ref setAxes.
   By default, the QCustomPlot's x- and yAxis are used.
 
   \li The position is fixed on the QCustomPlot surface, i.e. independent of axis ranges. This
   corresponds to all other types, i.e. \ref ptAbsolute, \ref ptViewportRatio and \ref
   ptAxisRectRatio. They differ only in the way the absolute position is described, see the
   documentation of \ref PositionType for details. For \ref ptAxisRectRatio, note that you can specify
   the axis rect with \ref setAxisRect. By default this is set to the main axis rect.
 
   Note that the position type \ref ptPlotCoords is only available (and sensible) when the position
   has no parent anchor (\ref setParentAnchor).
 
   If the type is changed, the apparent pixel position on the plot is preserved. This means
   the coordinates as retrieved with coords() and set with \ref setCoords may change in the process.
 
   This method sets the type for both X and Y directions. It is also possible to set different types
   for X and Y, see \ref setTypeX, \ref setTypeY.
 */
 void QCPItemPosition::setType(QCPItemPosition::PositionType type)
 {
     setTypeX(type);
     setTypeY(type);
 }
 
 /*!
   This method sets the position type of the X coordinate to \a type.
 
   For a detailed description of what a position type is, see the documentation of \ref setType.
 
   \see setType, setTypeY
 */
 void QCPItemPosition::setTypeX(QCPItemPosition::PositionType type)
 {
     if (mPositionTypeX != type)
     {
         // if switching from or to coordinate type that isn't valid (e.g. because axes or axis rect
         // were deleted), don't try to recover the pixelPosition() because it would output a qDebug warning.
         bool retainPixelPosition = true;
         if ((mPositionTypeX == ptPlotCoords || type == ptPlotCoords) && (!mKeyAxis || !mValueAxis))
             retainPixelPosition = false;
         if ((mPositionTypeX == ptAxisRectRatio || type == ptAxisRectRatio) && (!mAxisRect))
             retainPixelPosition = false;
 
         QPointF pixel;
         if (retainPixelPosition)
             pixel = pixelPosition();
 
         mPositionTypeX = type;
 
         if (retainPixelPosition)
             setPixelPosition(pixel);
     }
 }
 
 /*!
   This method sets the position type of the Y coordinate to \a type.
 
   For a detailed description of what a position type is, see the documentation of \ref setType.
 
   \see setType, setTypeX
 */
 void QCPItemPosition::setTypeY(QCPItemPosition::PositionType type)
 {
     if (mPositionTypeY != type)
     {
         // if switching from or to coordinate type that isn't valid (e.g. because axes or axis rect
         // were deleted), don't try to recover the pixelPosition() because it would output a qDebug warning.
         bool retainPixelPosition = true;
         if ((mPositionTypeY == ptPlotCoords || type == ptPlotCoords) && (!mKeyAxis || !mValueAxis))
             retainPixelPosition = false;
         if ((mPositionTypeY == ptAxisRectRatio || type == ptAxisRectRatio) && (!mAxisRect))
             retainPixelPosition = false;
 
         QPointF pixel;
         if (retainPixelPosition)
             pixel = pixelPosition();
 
         mPositionTypeY = type;
 
         if (retainPixelPosition)
             setPixelPosition(pixel);
     }
 }
 
 /*!
   Sets the parent of this QCPItemPosition to \a parentAnchor. This means the position will now
   follow any position changes of the anchor. The local coordinate system of positions with a parent
   anchor always is absolute pixels, with (0, 0) being exactly on top of the parent anchor. (Hence
   the type shouldn't be set to \ref ptPlotCoords for positions with parent anchors.)
 
   if \a keepPixelPosition is true, the current pixel position of the QCPItemPosition is preserved
   during reparenting. If it's set to false, the coordinates are set to (0, 0), i.e. the position
   will be exactly on top of the parent anchor.
 
   To remove this QCPItemPosition from any parent anchor, set \a parentAnchor to 0.
 
   If the QCPItemPosition previously had no parent and the type is \ref ptPlotCoords, the type is
   set to \ref ptAbsolute, to keep the position in a valid state.
 
   This method sets the parent anchor for both X and Y directions. It is also possible to set
   different parents for X and Y, see \ref setParentAnchorX, \ref setParentAnchorY.
 */
 bool QCPItemPosition::setParentAnchor(QCPItemAnchor *parentAnchor, bool keepPixelPosition)
 {
     bool successX = setParentAnchorX(parentAnchor, keepPixelPosition);
     bool successY = setParentAnchorY(parentAnchor, keepPixelPosition);
     return successX && successY;
 }
 
 /*!
   This method sets the parent anchor of the X coordinate to \a parentAnchor.
 
   For a detailed description of what a parent anchor is, see the documentation of \ref setParentAnchor.
 
   \see setParentAnchor, setParentAnchorY
 */
 bool QCPItemPosition::setParentAnchorX(QCPItemAnchor *parentAnchor, bool keepPixelPosition)
 {
     // make sure self is not assigned as parent:
     if (parentAnchor == this)
     {
         qDebug() << Q_FUNC_INFO << "can't set self as parent anchor" << reinterpret_cast<quintptr>(parentAnchor);
         return false;
     }
     // make sure no recursive parent-child-relationships are created:
     QCPItemAnchor *currentParent = parentAnchor;
     while (currentParent)
     {
         if (QCPItemPosition *currentParentPos = currentParent->toQCPItemPosition())
         {
             // is a QCPItemPosition, might have further parent, so keep iterating
             if (currentParentPos == this)
             {
                 qDebug() << Q_FUNC_INFO << "can't create recursive parent-child-relationship"
                          << reinterpret_cast<quintptr>(parentAnchor);
                 return false;
             }
             currentParent = currentParentPos->parentAnchorX();
         }
         else
         {
             // is a QCPItemAnchor, can't have further parent. Now make sure the parent items aren't the
             // same, to prevent a position being child of an anchor which itself depends on the position,
             // because they're both on the same item:
             if (currentParent->mParentItem == mParentItem)
             {
                 qDebug() << Q_FUNC_INFO << "can't set parent to be an anchor which itself depends on this position"
                          << reinterpret_cast<quintptr>(parentAnchor);
                 return false;
             }
             break;
         }
     }
 
     // if previously no parent set and PosType is still ptPlotCoords, set to ptAbsolute:
     if (!mParentAnchorX && mPositionTypeX == ptPlotCoords)
         setTypeX(ptAbsolute);
 
     // save pixel position:
     QPointF pixelP;
     if (keepPixelPosition)
         pixelP = pixelPosition();
     // unregister at current parent anchor:
     if (mParentAnchorX)
         mParentAnchorX->removeChildX(this);
     // register at new parent anchor:
     if (parentAnchor)
         parentAnchor->addChildX(this);
     mParentAnchorX = parentAnchor;
     // restore pixel position under new parent:
     if (keepPixelPosition)
         setPixelPosition(pixelP);
     else
         setCoords(0, coords().y());
     return true;
 }
 
 /*!
   This method sets the parent anchor of the Y coordinate to \a parentAnchor.
 
   For a detailed description of what a parent anchor is, see the documentation of \ref setParentAnchor.
 
   \see setParentAnchor, setParentAnchorX
 */
 bool QCPItemPosition::setParentAnchorY(QCPItemAnchor *parentAnchor, bool keepPixelPosition)
 {
     // make sure self is not assigned as parent:
     if (parentAnchor == this)
     {
         qDebug() << Q_FUNC_INFO << "can't set self as parent anchor" << reinterpret_cast<quintptr>(parentAnchor);
         return false;
     }
     // make sure no recursive parent-child-relationships are created:
     QCPItemAnchor *currentParent = parentAnchor;
     while (currentParent)
     {
         if (QCPItemPosition *currentParentPos = currentParent->toQCPItemPosition())
         {
             // is a QCPItemPosition, might have further parent, so keep iterating
             if (currentParentPos == this)
             {
                 qDebug() << Q_FUNC_INFO << "can't create recursive parent-child-relationship"
                          << reinterpret_cast<quintptr>(parentAnchor);
                 return false;
             }
             currentParent = currentParentPos->parentAnchorY();
         }
         else
         {
             // is a QCPItemAnchor, can't have further parent. Now make sure the parent items aren't the
             // same, to prevent a position being child of an anchor which itself depends on the position,
             // because they're both on the same item:
             if (currentParent->mParentItem == mParentItem)
             {
                 qDebug() << Q_FUNC_INFO << "can't set parent to be an anchor which itself depends on this position"
                          << reinterpret_cast<quintptr>(parentAnchor);
                 return false;
             }
             break;
         }
     }
 
     // if previously no parent set and PosType is still ptPlotCoords, set to ptAbsolute:
     if (!mParentAnchorY && mPositionTypeY == ptPlotCoords)
         setTypeY(ptAbsolute);
 
     // save pixel position:
     QPointF pixelP;
     if (keepPixelPosition)
         pixelP = pixelPosition();
     // unregister at current parent anchor:
     if (mParentAnchorY)
         mParentAnchorY->removeChildY(this);
     // register at new parent anchor:
     if (parentAnchor)
         parentAnchor->addChildY(this);
     mParentAnchorY = parentAnchor;
     // restore pixel position under new parent:
     if (keepPixelPosition)
         setPixelPosition(pixelP);
     else
         setCoords(coords().x(), 0);
     return true;
 }
 
 /*!
   Sets the coordinates of this QCPItemPosition. What the coordinates mean, is defined by the type
   (\ref setType, \ref setTypeX, \ref setTypeY).
 
   For example, if the type is \ref ptAbsolute, \a key and \a value mean the x and y pixel position
   on the QCustomPlot surface. In that case the origin (0, 0) is in the top left corner of the
   QCustomPlot viewport. If the type is \ref ptPlotCoords, \a key and \a value mean a point in the
   plot coordinate system defined by the axes set by \ref setAxes. By default those are the
   QCustomPlot's xAxis and yAxis. See the documentation of \ref setType for other available
   coordinate types and their meaning.
 
   If different types were configured for X and Y (\ref setTypeX, \ref setTypeY), \a key and \a
   value must also be provided in the different coordinate systems. Here, the X type refers to \a
   key, and the Y type refers to \a value.
 
   \see setPixelPosition
 */
 void QCPItemPosition::setCoords(double key, double value)
 {
     mKey   = key;
     mValue = value;
 }
 
 /*! \overload
 
   Sets the coordinates as a QPointF \a pos where pos.x has the meaning of \a key and pos.y the
   meaning of \a value of the \ref setCoords(double key, double value) method.
 */
 void QCPItemPosition::setCoords(const QPointF &pos)
 {
     setCoords(pos.x(), pos.y());
 }
 
 /*!
   Returns the final absolute pixel position of the QCPItemPosition on the QCustomPlot surface. It
   includes all effects of type (\ref setType) and possible parent anchors (\ref setParentAnchor).
 
   \see setPixelPosition
 */
 QPointF QCPItemPosition::pixelPosition() const
 {
     QPointF result;
 
     // determine X:
     switch (mPositionTypeX)
     {
         case ptAbsolute:
         {
             result.rx() = mKey;
             if (mParentAnchorX)
                 result.rx() += mParentAnchorX->pixelPosition().x();
             break;
         }
         case ptViewportRatio:
         {
             result.rx() = mKey * mParentPlot->viewport().width();
             if (mParentAnchorX)
                 result.rx() += mParentAnchorX->pixelPosition().x();
             else
                 result.rx() += mParentPlot->viewport().left();
             break;
         }
         case ptAxisRectRatio:
         {
             if (mAxisRect)
             {
                 result.rx() = mKey * mAxisRect.data()->width();
                 if (mParentAnchorX)
                     result.rx() += mParentAnchorX->pixelPosition().x();
                 else
                     result.rx() += mAxisRect.data()->left();
             }
             else
                 qDebug() << Q_FUNC_INFO << "Item position type x is ptAxisRectRatio, but no axis rect was defined";
             break;
         }
         case ptPlotCoords:
         {
             if (mKeyAxis && mKeyAxis.data()->orientation() == Qt::Horizontal)
                 result.rx() = mKeyAxis.data()->coordToPixel(mKey);
             else if (mValueAxis && mValueAxis.data()->orientation() == Qt::Horizontal)
                 result.rx() = mValueAxis.data()->coordToPixel(mValue);
             else
                 qDebug() << Q_FUNC_INFO << "Item position type x is ptPlotCoords, but no axes were defined";
             break;
         }
     }
 
     // determine Y:
     switch (mPositionTypeY)
     {
         case ptAbsolute:
         {
             result.ry() = mValue;
             if (mParentAnchorY)
                 result.ry() += mParentAnchorY->pixelPosition().y();
             break;
         }
         case ptViewportRatio:
         {
             result.ry() = mValue * mParentPlot->viewport().height();
             if (mParentAnchorY)
                 result.ry() += mParentAnchorY->pixelPosition().y();
             else
                 result.ry() += mParentPlot->viewport().top();
             break;
         }
         case ptAxisRectRatio:
         {
             if (mAxisRect)
             {
                 result.ry() = mValue * mAxisRect.data()->height();
                 if (mParentAnchorY)
                     result.ry() += mParentAnchorY->pixelPosition().y();
                 else
                     result.ry() += mAxisRect.data()->top();
             }
             else
                 qDebug() << Q_FUNC_INFO << "Item position type y is ptAxisRectRatio, but no axis rect was defined";
             break;
         }
         case ptPlotCoords:
         {
             if (mKeyAxis && mKeyAxis.data()->orientation() == Qt::Vertical)
                 result.ry() = mKeyAxis.data()->coordToPixel(mKey);
             else if (mValueAxis && mValueAxis.data()->orientation() == Qt::Vertical)
                 result.ry() = mValueAxis.data()->coordToPixel(mValue);
             else
                 qDebug() << Q_FUNC_INFO << "Item position type y is ptPlotCoords, but no axes were defined";
             break;
         }
     }
 
     return result;
 }
 
 /*!
   When \ref setType is \ref ptPlotCoords, this function may be used to specify the axes the
   coordinates set with \ref setCoords relate to. By default they are set to the initial xAxis and
   yAxis of the QCustomPlot.
 */
 void QCPItemPosition::setAxes(QCPAxis *keyAxis, QCPAxis *valueAxis)
 {
     mKeyAxis   = keyAxis;
     mValueAxis = valueAxis;
 }
 
 /*!
   When \ref setType is \ref ptAxisRectRatio, this function may be used to specify the axis rect the
   coordinates set with \ref setCoords relate to. By default this is set to the main axis rect of
   the QCustomPlot.
 */
 void QCPItemPosition::setAxisRect(QCPAxisRect *axisRect)
 {
     mAxisRect = axisRect;
 }
 
 /*!
   Sets the apparent pixel position. This works no matter what type (\ref setType) this
   QCPItemPosition is or what parent-child situation it is in, as coordinates are transformed
   appropriately, to make the position finally appear at the specified pixel values.
 
   Only if the type is \ref ptAbsolute and no parent anchor is set, this function's effect is
   identical to that of \ref setCoords.
 
   \see pixelPosition, setCoords
 */
 void QCPItemPosition::setPixelPosition(const QPointF &pixelPosition)
 {
     double x = pixelPosition.x();
     double y = pixelPosition.y();
 
     switch (mPositionTypeX)
     {
         case ptAbsolute:
         {
             if (mParentAnchorX)
                 x -= mParentAnchorX->pixelPosition().x();
             break;
         }
         case ptViewportRatio:
         {
             if (mParentAnchorX)
                 x -= mParentAnchorX->pixelPosition().x();
             else
                 x -= mParentPlot->viewport().left();
             x /= (double)mParentPlot->viewport().width();
             break;
         }
         case ptAxisRectRatio:
         {
             if (mAxisRect)
             {
                 if (mParentAnchorX)
                     x -= mParentAnchorX->pixelPosition().x();
                 else
                     x -= mAxisRect.data()->left();
                 x /= (double)mAxisRect.data()->width();
             }
             else
                 qDebug() << Q_FUNC_INFO << "Item position type x is ptAxisRectRatio, but no axis rect was defined";
             break;
         }
         case ptPlotCoords:
         {
             if (mKeyAxis && mKeyAxis.data()->orientation() == Qt::Horizontal)
                 x = mKeyAxis.data()->pixelToCoord(x);
             else if (mValueAxis && mValueAxis.data()->orientation() == Qt::Horizontal)
                 y = mValueAxis.data()->pixelToCoord(x);
             else
                 qDebug() << Q_FUNC_INFO << "Item position type x is ptPlotCoords, but no axes were defined";
             break;
         }
     }
 
     switch (mPositionTypeY)
     {
         case ptAbsolute:
         {
             if (mParentAnchorY)
                 y -= mParentAnchorY->pixelPosition().y();
             break;
         }
         case ptViewportRatio:
         {
             if (mParentAnchorY)
                 y -= mParentAnchorY->pixelPosition().y();
             else
                 y -= mParentPlot->viewport().top();
             y /= (double)mParentPlot->viewport().height();
             break;
         }
         case ptAxisRectRatio:
         {
             if (mAxisRect)
             {
                 if (mParentAnchorY)
                     y -= mParentAnchorY->pixelPosition().y();
                 else
                     y -= mAxisRect.data()->top();
                 y /= (double)mAxisRect.data()->height();
             }
             else
                 qDebug() << Q_FUNC_INFO << "Item position type y is ptAxisRectRatio, but no axis rect was defined";
             break;
         }
         case ptPlotCoords:
         {
             if (mKeyAxis && mKeyAxis.data()->orientation() == Qt::Vertical)
                 x = mKeyAxis.data()->pixelToCoord(y);
             else if (mValueAxis && mValueAxis.data()->orientation() == Qt::Vertical)
                 y = mValueAxis.data()->pixelToCoord(y);
             else
                 qDebug() << Q_FUNC_INFO << "Item position type y is ptPlotCoords, but no axes were defined";
             break;
         }
     }
 
     setCoords(x, y);
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAbstractItem
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAbstractItem
   \brief The abstract base class for all items in a plot.
 
   In QCustomPlot, items are supplemental graphical elements that are neither plottables
   (QCPAbstractPlottable) nor axes (QCPAxis). While plottables are always tied to two axes and thus
   plot coordinates, items can also be placed in absolute coordinates independent of any axes. Each
   specific item has at least one QCPItemPosition member which controls the positioning. Some items
   are defined by more than one coordinate and thus have two or more QCPItemPosition members (For
   example, QCPItemRect has \a topLeft and \a bottomRight).
 
   This abstract base class defines a very basic interface like visibility and clipping. Since this
   class is abstract, it can't be instantiated. Use one of the subclasses or create a subclass
   yourself to create new items.
 
   The built-in items are:
   <table>
   <tr><td>QCPItemLine</td><td>A line defined by a start and an end point. May have different ending styles on each side (e.g. arrows).</td></tr>
   <tr><td>QCPItemStraightLine</td><td>A straight line defined by a start and a direction point. Unlike QCPItemLine, the straight line is infinitely long and has no endings.</td></tr>
   <tr><td>QCPItemCurve</td><td>A curve defined by start, end and two intermediate control points. May have different ending styles on each side (e.g. arrows).</td></tr>
   <tr><td>QCPItemRect</td><td>A rectangle</td></tr>
   <tr><td>QCPItemEllipse</td><td>An ellipse</td></tr>
   <tr><td>QCPItemPixmap</td><td>An arbitrary pixmap</td></tr>
   <tr><td>QCPItemText</td><td>A text label</td></tr>
   <tr><td>QCPItemBracket</td><td>A bracket which may be used to reference/highlight certain parts in the plot.</td></tr>
   <tr><td>QCPItemTracer</td><td>An item that can be attached to a QCPGraph and sticks to its data points, given a key coordinate.</td></tr>
   </table>
 
   \section items-clipping Clipping
 
   Items are by default clipped to the main axis rect (they are only visible inside the axis rect).
   To make an item visible outside that axis rect, disable clipping via \ref setClipToAxisRect
   "setClipToAxisRect(false)".
 
   On the other hand if you want the item to be clipped to a different axis rect, specify it via
   \ref setClipAxisRect. This clipAxisRect property of an item is only used for clipping behaviour, and
   in principle is independent of the coordinate axes the item might be tied to via its position
   members (\ref QCPItemPosition::setAxes). However, it is common that the axis rect for clipping
   also contains the axes used for the item positions.
 
   \section items-using Using items
 
   First you instantiate the item you want to use and add it to the plot:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpitemline-creation-1
   by default, the positions of the item are bound to the x- and y-Axis of the plot. So we can just
   set the plot coordinates where the line should start/end:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpitemline-creation-2
   If we don't want the line to be positioned in plot coordinates but a different coordinate system,
   e.g. absolute pixel positions on the QCustomPlot surface, we need to change the position type like this:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpitemline-creation-3
   Then we can set the coordinates, this time in pixels:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpitemline-creation-4
   and make the line visible on the entire QCustomPlot, by disabling clipping to the axis rect:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpitemline-creation-5
 
   For more advanced plots, it is even possible to set different types and parent anchors per X/Y
   coordinate of an item position, using for example \ref QCPItemPosition::setTypeX or \ref
   QCPItemPosition::setParentAnchorX. For details, see the documentation of \ref QCPItemPosition.
 
   \section items-subclassing Creating own items
 
   To create an own item, you implement a subclass of QCPAbstractItem. These are the pure
   virtual functions, you must implement:
   \li \ref selectTest
   \li \ref draw
 
   See the documentation of those functions for what they need to do.
 
   \subsection items-positioning Allowing the item to be positioned
 
   As mentioned, item positions are represented by QCPItemPosition members. Let's assume the new item shall
   have only one point as its position (as opposed to two like a rect or multiple like a polygon). You then add
   a public member of type QCPItemPosition like so:
 
   \code QCPItemPosition * const myPosition;\endcode
 
   the const makes sure the pointer itself can't be modified from the user of your new item (the QCPItemPosition
   instance it points to, can be modified, of course).
   The initialization of this pointer is made easy with the \ref createPosition function. Just assign
   the return value of this function to each QCPItemPosition in the constructor of your item. \ref createPosition
   takes a string which is the name of the position, typically this is identical to the variable name.
   For example, the constructor of QCPItemExample could look like this:
 
   \code
   QCPItemExample::QCPItemExample(QCustomPlot *parentPlot) :
     QCPAbstractItem(parentPlot),
     myPosition(createPosition("myPosition"))
   {
     // other constructor code
   }
   \endcode
 
   \subsection items-drawing The draw function
 
   To give your item a visual representation, reimplement the \ref draw function and use the passed
   QCPPainter to draw the item. You can retrieve the item position in pixel coordinates from the
   position member(s) via \ref QCPItemPosition::pixelPosition.
 
   To optimize performance you should calculate a bounding rect first (don't forget to take the pen
   width into account), check whether it intersects the \ref clipRect, and only draw the item at all
   if this is the case.
 
   \subsection items-selection The selectTest function
 
   Your implementation of the \ref selectTest function may use the helpers \ref
   QCPVector2D::distanceSquaredToLine and \ref rectDistance. With these, the implementation of the
   selection test becomes significantly simpler for most items. See the documentation of \ref
   selectTest for what the function parameters mean and what the function should return.
 
   \subsection anchors Providing anchors
 
   Providing anchors (QCPItemAnchor) starts off like adding a position. First you create a public
   member, e.g.
 
   \code QCPItemAnchor * const bottom;\endcode
 
   and create it in the constructor with the \ref createAnchor function, assigning it a name and an
   anchor id (an integer enumerating all anchors on the item, you may create an own enum for this).
   Since anchors can be placed anywhere, relative to the item's position(s), your item needs to
   provide the position of every anchor with the reimplementation of the \ref anchorPixelPosition(int
   anchorId) function.
 
   In essence the QCPItemAnchor is merely an intermediary that itself asks your item for the pixel
   position when anything attached to the anchor needs to know the coordinates.
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QList<QCPItemPosition*> QCPAbstractItem::positions() const
 
   Returns all positions of the item in a list.
 
   \see anchors, position
 */
 
 /*! \fn QList<QCPItemAnchor*> QCPAbstractItem::anchors() const
 
   Returns all anchors of the item in a list. Note that since a position (QCPItemPosition) is always
   also an anchor, the list will also contain the positions of this item.
 
   \see positions, anchor
 */
 
 /* end of documentation of inline functions */
 /* start documentation of pure virtual functions */
 
 /*! \fn void QCPAbstractItem::draw(QCPPainter *painter) = 0
   \internal
 
   Draws this item with the provided \a painter.
 
   The cliprect of the provided painter is set to the rect returned by \ref clipRect before this
   function is called. The clipRect depends on the clipping settings defined by \ref
   setClipToAxisRect and \ref setClipAxisRect.
 */
 
 /* end documentation of pure virtual functions */
 /* start documentation of signals */
 
 /*! \fn void QCPAbstractItem::selectionChanged(bool selected)
   This signal is emitted when the selection state of this item has changed, either by user interaction
   or by a direct call to \ref setSelected.
 */
 
 /* end documentation of signals */
 
 /*!
   Base class constructor which initializes base class members.
 */
 QCPAbstractItem::QCPAbstractItem(QCustomPlot *parentPlot)
     : QCPLayerable(parentPlot), mClipToAxisRect(false), mSelectable(true), mSelected(false)
 {
     parentPlot->registerItem(this);
 
     QList<QCPAxisRect *> rects = parentPlot->axisRects();
     if (rects.size() > 0)
     {
         setClipToAxisRect(true);
         setClipAxisRect(rects.first());
     }
 }
 
 QCPAbstractItem::~QCPAbstractItem()
 {
     // don't delete mPositions because every position is also an anchor and thus in mAnchors
     qDeleteAll(mAnchors);
 }
 
 /* can't make this a header inline function, because QPointer breaks with forward declared types, see QTBUG-29588 */
 QCPAxisRect *QCPAbstractItem::clipAxisRect() const
 {
     return mClipAxisRect.data();
 }
 
 /*!
   Sets whether the item shall be clipped to an axis rect or whether it shall be visible on the
   entire QCustomPlot. The axis rect can be set with \ref setClipAxisRect.
 
   \see setClipAxisRect
 */
 void QCPAbstractItem::setClipToAxisRect(bool clip)
 {
     mClipToAxisRect = clip;
     if (mClipToAxisRect)
         setParentLayerable(mClipAxisRect.data());
 }
 
 /*!
   Sets the clip axis rect. It defines the rect that will be used to clip the item when \ref
   setClipToAxisRect is set to true.
 
   \see setClipToAxisRect
 */
 void QCPAbstractItem::setClipAxisRect(QCPAxisRect *rect)
 {
     mClipAxisRect = rect;
     if (mClipToAxisRect)
         setParentLayerable(mClipAxisRect.data());
 }
 
 /*!
   Sets whether the user can (de-)select this item by clicking on the QCustomPlot surface.
   (When \ref QCustomPlot::setInteractions contains QCustomPlot::iSelectItems.)
 
   However, even when \a selectable was set to false, it is possible to set the selection manually,
   by calling \ref setSelected.
 
   \see QCustomPlot::setInteractions, setSelected
 */
 void QCPAbstractItem::setSelectable(bool selectable)
 {
     if (mSelectable != selectable)
     {
         mSelectable = selectable;
         emit selectableChanged(mSelectable);
     }
 }
 
 /*!
   Sets whether this item is selected or not. When selected, it might use a different visual
   appearance (e.g. pen and brush), this depends on the specific item though.
 
   The entire selection mechanism for items is handled automatically when \ref
   QCustomPlot::setInteractions contains QCustomPlot::iSelectItems. You only need to call this
   function when you wish to change the selection state manually.
 
   This function can change the selection state even when \ref setSelectable was set to false.
 
   emits the \ref selectionChanged signal when \a selected is different from the previous selection state.
 
   \see setSelectable, selectTest
 */
 void QCPAbstractItem::setSelected(bool selected)
 {
     if (mSelected != selected)
     {
         mSelected = selected;
         emit selectionChanged(mSelected);
     }
 }
 
 /*!
   Returns the QCPItemPosition with the specified \a name. If this item doesn't have a position by
   that name, returns 0.
 
   This function provides an alternative way to access item positions. Normally, you access
   positions direcly by their member pointers (which typically have the same variable name as \a
   name).
 
   \see positions, anchor
 */
 QCPItemPosition *QCPAbstractItem::position(const QString &name) const
 {
     for (int i = 0; i < mPositions.size(); ++i)
     {
         if (mPositions.at(i)->name() == name)
             return mPositions.at(i);
     }
     qDebug() << Q_FUNC_INFO << "position with name not found:" << name;
-    return 0;
+    return nullptr;
 }
 
 /*!
   Returns the QCPItemAnchor with the specified \a name. If this item doesn't have an anchor by
   that name, returns 0.
 
   This function provides an alternative way to access item anchors. Normally, you access
   anchors direcly by their member pointers (which typically have the same variable name as \a
   name).
 
   \see anchors, position
 */
 QCPItemAnchor *QCPAbstractItem::anchor(const QString &name) const
 {
     for (int i = 0; i < mAnchors.size(); ++i)
     {
         if (mAnchors.at(i)->name() == name)
             return mAnchors.at(i);
     }
     qDebug() << Q_FUNC_INFO << "anchor with name not found:" << name;
-    return 0;
+    return nullptr;
 }
 
 /*!
   Returns whether this item has an anchor with the specified \a name.
 
   Note that you can check for positions with this function, too. This is because every position is
   also an anchor (QCPItemPosition inherits from QCPItemAnchor).
 
   \see anchor, position
 */
 bool QCPAbstractItem::hasAnchor(const QString &name) const
 {
     for (int i = 0; i < mAnchors.size(); ++i)
     {
         if (mAnchors.at(i)->name() == name)
             return true;
     }
     return false;
 }
 
 /*! \internal
 
   Returns the rect the visual representation of this item is clipped to. This depends on the
   current setting of \ref setClipToAxisRect as well as the axis rect set with \ref setClipAxisRect.
 
   If the item is not clipped to an axis rect, QCustomPlot's viewport rect is returned.
 
   \see draw
 */
 QRect QCPAbstractItem::clipRect() const
 {
     if (mClipToAxisRect && mClipAxisRect)
         return mClipAxisRect.data()->rect();
     else
         return mParentPlot->viewport();
 }
 
 /*! \internal
 
   A convenience function to easily set the QPainter::Antialiased hint on the provided \a painter
   before drawing item lines.
 
   This is the antialiasing state the painter passed to the \ref draw method is in by default.
 
   This function takes into account the local setting of the antialiasing flag as well as the
   overrides set with \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 
   \see setAntialiased
 */
 void QCPAbstractItem::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aeItems);
 }
 
 /*! \internal
 
   A convenience function which returns the selectTest value for a specified \a rect and a specified
   click position \a pos. \a filledRect defines whether a click inside the rect should also be
   considered a hit or whether only the rect border is sensitive to hits.
 
   This function may be used to help with the implementation of the \ref selectTest function for
   specific items.
 
   For example, if your item consists of four rects, call this function four times, once for each
   rect, in your \ref selectTest reimplementation. Finally, return the minimum (non -1) of all four
   returned values.
 */
 double QCPAbstractItem::rectDistance(const QRectF &rect, const QPointF &pos, bool filledRect) const
 {
     double result = -1;
 
     // distance to border:
     QList<QLineF> lines;
     lines << QLineF(rect.topLeft(), rect.topRight()) << QLineF(rect.bottomLeft(), rect.bottomRight())
           << QLineF(rect.topLeft(), rect.bottomLeft()) << QLineF(rect.topRight(), rect.bottomRight());
     double minDistSqr = std::numeric_limits<double>::max();
     for (int i = 0; i < lines.size(); ++i)
     {
         double distSqr = QCPVector2D(pos).distanceSquaredToLine(lines.at(i).p1(), lines.at(i).p2());
         if (distSqr < minDistSqr)
             minDistSqr = distSqr;
     }
     result = qSqrt(minDistSqr);
 
     // filled rect, allow click inside to count as hit:
     if (filledRect && result > mParentPlot->selectionTolerance() * 0.99)
     {
         if (rect.contains(pos))
             result = mParentPlot->selectionTolerance() * 0.99;
     }
     return result;
 }
 
 /*! \internal
 
   Returns the pixel position of the anchor with Id \a anchorId. This function must be reimplemented in
   item subclasses if they want to provide anchors (QCPItemAnchor).
 
   For example, if the item has two anchors with id 0 and 1, this function takes one of these anchor
   ids and returns the respective pixel points of the specified anchor.
 
   \see createAnchor
 */
 QPointF QCPAbstractItem::anchorPixelPosition(int anchorId) const
 {
     qDebug() << Q_FUNC_INFO
              << "called on item which shouldn't have any anchors (this method not reimplemented). anchorId" << anchorId;
     return QPointF();
 }
 
 /*! \internal
 
   Creates a QCPItemPosition, registers it with this item and returns a pointer to it. The specified
   \a name must be a unique string that is usually identical to the variable name of the position
   member (This is needed to provide the name-based \ref position access to positions).
 
   Don't delete positions created by this function manually, as the item will take care of it.
 
   Use this function in the constructor (initialization list) of the specific item subclass to
   create each position member. Don't create QCPItemPositions with \b new yourself, because they
   won't be registered with the item properly.
 
   \see createAnchor
 */
 QCPItemPosition *QCPAbstractItem::createPosition(const QString &name)
 {
     if (hasAnchor(name))
         qDebug() << Q_FUNC_INFO << "anchor/position with name exists already:" << name;
     QCPItemPosition *newPosition = new QCPItemPosition(mParentPlot, this, name);
     mPositions.append(newPosition);
     mAnchors.append(newPosition); // every position is also an anchor
     newPosition->setAxes(mParentPlot->xAxis, mParentPlot->yAxis);
     newPosition->setType(QCPItemPosition::ptPlotCoords);
     if (mParentPlot->axisRect())
         newPosition->setAxisRect(mParentPlot->axisRect());
     newPosition->setCoords(0, 0);
     return newPosition;
 }
 
 /*! \internal
 
   Creates a QCPItemAnchor, registers it with this item and returns a pointer to it. The specified
   \a name must be a unique string that is usually identical to the variable name of the anchor
   member (This is needed to provide the name based \ref anchor access to anchors).
 
   The \a anchorId must be a number identifying the created anchor. It is recommended to create an
   enum (e.g. "AnchorIndex") for this on each item that uses anchors. This id is used by the anchor
   to identify itself when it calls QCPAbstractItem::anchorPixelPosition. That function then returns
   the correct pixel coordinates for the passed anchor id.
 
   Don't delete anchors created by this function manually, as the item will take care of it.
 
   Use this function in the constructor (initialization list) of the specific item subclass to
   create each anchor member. Don't create QCPItemAnchors with \b new yourself, because then they
   won't be registered with the item properly.
 
   \see createPosition
 */
 QCPItemAnchor *QCPAbstractItem::createAnchor(const QString &name, int anchorId)
 {
     if (hasAnchor(name))
         qDebug() << Q_FUNC_INFO << "anchor/position with name exists already:" << name;
     QCPItemAnchor *newAnchor = new QCPItemAnchor(mParentPlot, this, name, anchorId);
     mAnchors.append(newAnchor);
     return newAnchor;
 }
 
 /* inherits documentation from base class */
 void QCPAbstractItem::selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                                   bool *selectionStateChanged)
 {
     Q_UNUSED(event)
     Q_UNUSED(details)
     if (mSelectable)
     {
         bool selBefore = mSelected;
         setSelected(additive ? !mSelected : true);
         if (selectionStateChanged)
             *selectionStateChanged = mSelected != selBefore;
     }
 }
 
 /* inherits documentation from base class */
 void QCPAbstractItem::deselectEvent(bool *selectionStateChanged)
 {
     if (mSelectable)
     {
         bool selBefore = mSelected;
         setSelected(false);
         if (selectionStateChanged)
             *selectionStateChanged = mSelected != selBefore;
     }
 }
 
 /* inherits documentation from base class */
 QCP::Interaction QCPAbstractItem::selectionCategory() const
 {
     return QCP::iSelectItems;
 }
 /* end of 'src/item.cpp' */
 
 /* including file 'src/core.cpp', size 124243                                */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCustomPlot
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCustomPlot
 
   \brief The central class of the library. This is the QWidget which displays the plot and
   interacts with the user.
 
   For tutorials on how to use QCustomPlot, see the website\n
   http://www.qcustomplot.com/
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QCPSelectionRect *QCustomPlot::selectionRect() const
 
   Allows access to the currently used QCPSelectionRect instance (or subclass thereof), that is used
   to handle and draw selection rect interactions (see \ref setSelectionRectMode).
 
   \see setSelectionRect
 */
 
 /*! \fn QCPLayoutGrid *QCustomPlot::plotLayout() const
 
   Returns the top level layout of this QCustomPlot instance. It is a \ref QCPLayoutGrid, initially containing just
   one cell with the main QCPAxisRect inside.
 */
 
 /* end of documentation of inline functions */
 /* start of documentation of signals */
 
 /*! \fn void QCustomPlot::mouseDoubleClick(QMouseEvent *event)
 
   This signal is emitted when the QCustomPlot receives a mouse double click event.
 */
 
 /*! \fn void QCustomPlot::mousePress(QMouseEvent *event)
 
   This signal is emitted when the QCustomPlot receives a mouse press event.
 
   It is emitted before QCustomPlot handles any other mechanism like range dragging. So a slot
   connected to this signal can still influence the behaviour e.g. with \ref QCPAxisRect::setRangeDrag or \ref
   QCPAxisRect::setRangeDragAxes.
 */
 
 /*! \fn void QCustomPlot::mouseMove(QMouseEvent *event)
 
   This signal is emitted when the QCustomPlot receives a mouse move event.
 
   It is emitted before QCustomPlot handles any other mechanism like range dragging. So a slot
   connected to this signal can still influence the behaviour e.g. with \ref QCPAxisRect::setRangeDrag or \ref
   QCPAxisRect::setRangeDragAxes.
 
   \warning It is discouraged to change the drag-axes with \ref QCPAxisRect::setRangeDragAxes here,
   because the dragging starting point was saved the moment the mouse was pressed. Thus it only has
   a meaning for the range drag axes that were set at that moment. If you want to change the drag
   axes, consider doing this in the \ref mousePress signal instead.
 */
 
 /*! \fn void QCustomPlot::mouseRelease(QMouseEvent *event)
 
   This signal is emitted when the QCustomPlot receives a mouse release event.
 
   It is emitted before QCustomPlot handles any other mechanisms like object selection. So a
   slot connected to this signal can still influence the behaviour e.g. with \ref setInteractions or
   \ref QCPAbstractPlottable::setSelectable.
 */
 
 /*! \fn void QCustomPlot::mouseWheel(QMouseEvent *event)
 
   This signal is emitted when the QCustomPlot receives a mouse wheel event.
 
   It is emitted before QCustomPlot handles any other mechanisms like range zooming. So a slot
   connected to this signal can still influence the behaviour e.g. with \ref QCPAxisRect::setRangeZoom, \ref
   QCPAxisRect::setRangeZoomAxes or \ref QCPAxisRect::setRangeZoomFactor.
 */
 
 /*! \fn void QCustomPlot::plottableClick(QCPAbstractPlottable *plottable, int dataIndex, QMouseEvent *event)
 
   This signal is emitted when a plottable is clicked.
 
   \a event is the mouse event that caused the click and \a plottable is the plottable that received
   the click. The parameter \a dataIndex indicates the data point that was closest to the click
   position.
 
   \see plottableDoubleClick
 */
 
 /*! \fn void QCustomPlot::plottableDoubleClick(QCPAbstractPlottable *plottable, int dataIndex, QMouseEvent *event)
 
   This signal is emitted when a plottable is double clicked.
 
   \a event is the mouse event that caused the click and \a plottable is the plottable that received
   the click. The parameter \a dataIndex indicates the data point that was closest to the click
   position.
 
   \see plottableClick
 */
 
 /*! \fn void QCustomPlot::itemClick(QCPAbstractItem *item, QMouseEvent *event)
 
   This signal is emitted when an item is clicked.
 
   \a event is the mouse event that caused the click and \a item is the item that received the
   click.
 
   \see itemDoubleClick
 */
 
 /*! \fn void QCustomPlot::itemDoubleClick(QCPAbstractItem *item, QMouseEvent *event)
 
   This signal is emitted when an item is double clicked.
 
   \a event is the mouse event that caused the click and \a item is the item that received the
   click.
 
   \see itemClick
 */
 
 /*! \fn void QCustomPlot::axisClick(QCPAxis *axis, QCPAxis::SelectablePart part, QMouseEvent *event)
 
   This signal is emitted when an axis is clicked.
 
   \a event is the mouse event that caused the click, \a axis is the axis that received the click and
   \a part indicates the part of the axis that was clicked.
 
   \see axisDoubleClick
 */
 
 /*! \fn void QCustomPlot::axisDoubleClick(QCPAxis *axis, QCPAxis::SelectablePart part, QMouseEvent *event)
 
   This signal is emitted when an axis is double clicked.
 
   \a event is the mouse event that caused the click, \a axis is the axis that received the click and
   \a part indicates the part of the axis that was clicked.
 
   \see axisClick
 */
 
 /*! \fn void QCustomPlot::legendClick(QCPLegend *legend, QCPAbstractLegendItem *item, QMouseEvent *event)
 
   This signal is emitted when a legend (item) is clicked.
 
   \a event is the mouse event that caused the click, \a legend is the legend that received the
   click and \a item is the legend item that received the click. If only the legend and no item is
   clicked, \a item is 0. This happens for a click inside the legend padding or the space between
   two items.
 
   \see legendDoubleClick
 */
 
 /*! \fn void QCustomPlot::legendDoubleClick(QCPLegend *legend,  QCPAbstractLegendItem *item, QMouseEvent *event)
 
   This signal is emitted when a legend (item) is double clicked.
 
   \a event is the mouse event that caused the click, \a legend is the legend that received the
   click and \a item is the legend item that received the click. If only the legend and no item is
   clicked, \a item is 0. This happens for a click inside the legend padding or the space between
   two items.
 
   \see legendClick
 */
 
 /*! \fn void QCustomPlot::selectionChangedByUser()
 
   This signal is emitted after the user has changed the selection in the QCustomPlot, e.g. by
   clicking. It is not emitted when the selection state of an object has changed programmatically by
   a direct call to <tt>setSelected()</tt>/<tt>setSelection()</tt> on an object or by calling \ref
   deselectAll.
 
   In addition to this signal, selectable objects also provide individual signals, for example \ref
   QCPAxis::selectionChanged or \ref QCPAbstractPlottable::selectionChanged. Note that those signals
   are emitted even if the selection state is changed programmatically.
 
   See the documentation of \ref setInteractions for details about the selection mechanism.
 
   \see selectedPlottables, selectedGraphs, selectedItems, selectedAxes, selectedLegends
 */
 
 /*! \fn void QCustomPlot::beforeReplot()
 
   This signal is emitted immediately before a replot takes place (caused by a call to the slot \ref
   replot).
 
   It is safe to mutually connect the replot slot with this signal on two QCustomPlots to make them
   replot synchronously, it won't cause an infinite recursion.
 
   \see replot, afterReplot
 */
 
 /*! \fn void QCustomPlot::afterReplot()
 
   This signal is emitted immediately after a replot has taken place (caused by a call to the slot \ref
   replot).
 
   It is safe to mutually connect the replot slot with this signal on two QCustomPlots to make them
   replot synchronously, it won't cause an infinite recursion.
 
   \see replot, beforeReplot
 */
 
 /* end of documentation of signals */
 /* start of documentation of public members */
 
 /*! \var QCPAxis *QCustomPlot::xAxis
 
   A pointer to the primary x Axis (bottom) of the main axis rect of the plot.
 
   QCustomPlot offers convenient pointers to the axes (\ref xAxis, \ref yAxis, \ref xAxis2, \ref
   yAxis2) and the \ref legend. They make it very easy working with plots that only have a single
   axis rect and at most one axis at each axis rect side. If you use \link thelayoutsystem the
   layout system\endlink to add multiple axis rects or multiple axes to one side, use the \ref
   QCPAxisRect::axis interface to access the new axes. If one of the four default axes or the
   default legend is removed due to manipulation of the layout system (e.g. by removing the main
   axis rect), the corresponding pointers become 0.
 
   If an axis convenience pointer is currently zero and a new axis rect or a corresponding axis is
   added in the place of the main axis rect, QCustomPlot resets the convenience pointers to the
   according new axes. Similarly the \ref legend convenience pointer will be reset if a legend is
   added after the main legend was removed before.
 */
 
 /*! \var QCPAxis *QCustomPlot::yAxis
 
   A pointer to the primary y Axis (left) of the main axis rect of the plot.
 
   QCustomPlot offers convenient pointers to the axes (\ref xAxis, \ref yAxis, \ref xAxis2, \ref
   yAxis2) and the \ref legend. They make it very easy working with plots that only have a single
   axis rect and at most one axis at each axis rect side. If you use \link thelayoutsystem the
   layout system\endlink to add multiple axis rects or multiple axes to one side, use the \ref
   QCPAxisRect::axis interface to access the new axes. If one of the four default axes or the
   default legend is removed due to manipulation of the layout system (e.g. by removing the main
   axis rect), the corresponding pointers become 0.
 
   If an axis convenience pointer is currently zero and a new axis rect or a corresponding axis is
   added in the place of the main axis rect, QCustomPlot resets the convenience pointers to the
   according new axes. Similarly the \ref legend convenience pointer will be reset if a legend is
   added after the main legend was removed before.
 */
 
 /*! \var QCPAxis *QCustomPlot::xAxis2
 
   A pointer to the secondary x Axis (top) of the main axis rect of the plot. Secondary axes are
   invisible by default. Use QCPAxis::setVisible to change this (or use \ref
   QCPAxisRect::setupFullAxesBox).
 
   QCustomPlot offers convenient pointers to the axes (\ref xAxis, \ref yAxis, \ref xAxis2, \ref
   yAxis2) and the \ref legend. They make it very easy working with plots that only have a single
   axis rect and at most one axis at each axis rect side. If you use \link thelayoutsystem the
   layout system\endlink to add multiple axis rects or multiple axes to one side, use the \ref
   QCPAxisRect::axis interface to access the new axes. If one of the four default axes or the
   default legend is removed due to manipulation of the layout system (e.g. by removing the main
   axis rect), the corresponding pointers become 0.
 
   If an axis convenience pointer is currently zero and a new axis rect or a corresponding axis is
   added in the place of the main axis rect, QCustomPlot resets the convenience pointers to the
   according new axes. Similarly the \ref legend convenience pointer will be reset if a legend is
   added after the main legend was removed before.
 */
 
 /*! \var QCPAxis *QCustomPlot::yAxis2
 
   A pointer to the secondary y Axis (right) of the main axis rect of the plot. Secondary axes are
   invisible by default. Use QCPAxis::setVisible to change this (or use \ref
   QCPAxisRect::setupFullAxesBox).
 
   QCustomPlot offers convenient pointers to the axes (\ref xAxis, \ref yAxis, \ref xAxis2, \ref
   yAxis2) and the \ref legend. They make it very easy working with plots that only have a single
   axis rect and at most one axis at each axis rect side. If you use \link thelayoutsystem the
   layout system\endlink to add multiple axis rects or multiple axes to one side, use the \ref
   QCPAxisRect::axis interface to access the new axes. If one of the four default axes or the
   default legend is removed due to manipulation of the layout system (e.g. by removing the main
   axis rect), the corresponding pointers become 0.
 
   If an axis convenience pointer is currently zero and a new axis rect or a corresponding axis is
   added in the place of the main axis rect, QCustomPlot resets the convenience pointers to the
   according new axes. Similarly the \ref legend convenience pointer will be reset if a legend is
   added after the main legend was removed before.
 */
 
 /*! \var QCPLegend *QCustomPlot::legend
 
   A pointer to the default legend of the main axis rect. The legend is invisible by default. Use
   QCPLegend::setVisible to change this.
 
   QCustomPlot offers convenient pointers to the axes (\ref xAxis, \ref yAxis, \ref xAxis2, \ref
   yAxis2) and the \ref legend. They make it very easy working with plots that only have a single
   axis rect and at most one axis at each axis rect side. If you use \link thelayoutsystem the
   layout system\endlink to add multiple legends to the plot, use the layout system interface to
   access the new legend. For example, legends can be placed inside an axis rect's \ref
   QCPAxisRect::insetLayout "inset layout", and must then also be accessed via the inset layout. If
   the default legend is removed due to manipulation of the layout system (e.g. by removing the main
   axis rect), the corresponding pointer becomes 0.
 
   If an axis convenience pointer is currently zero and a new axis rect or a corresponding axis is
   added in the place of the main axis rect, QCustomPlot resets the convenience pointers to the
   according new axes. Similarly the \ref legend convenience pointer will be reset if a legend is
   added after the main legend was removed before.
 */
 
 /* end of documentation of public members */
 
 /*!
   Constructs a QCustomPlot and sets reasonable default values.
 */
 QCustomPlot::QCustomPlot(QWidget *parent)
-    : QWidget(parent), xAxis(0), yAxis(0), xAxis2(0), yAxis2(0), legend(0),
+    : QWidget(parent), xAxis(nullptr), yAxis(nullptr), xAxis2(nullptr), yAxis2(nullptr), legend(nullptr),
       mBufferDevicePixelRatio(1.0), // will be adapted to primary screen below
-      mPlotLayout(0), mAutoAddPlottableToLegend(true), mAntialiasedElements(QCP::aeNone),
-      mNotAntialiasedElements(QCP::aeNone), mInteractions(0), mSelectionTolerance(8), mNoAntialiasingOnDrag(false),
+      mPlotLayout(nullptr), mAutoAddPlottableToLegend(true), mAntialiasedElements(QCP::aeNone),
+      mNotAntialiasedElements(QCP::aeNone), mInteractions(nullptr), mSelectionTolerance(8), mNoAntialiasingOnDrag(false),
       mBackgroundBrush(Qt::white, Qt::SolidPattern), mBackgroundScaled(true),
-      mBackgroundScaledMode(Qt::KeepAspectRatioByExpanding), mCurrentLayer(0),
+      mBackgroundScaledMode(Qt::KeepAspectRatioByExpanding), mCurrentLayer(nullptr),
       mPlottingHints(QCP::phCacheLabels | QCP::phImmediateRefresh), mMultiSelectModifier(Qt::ControlModifier),
-      mSelectionRectMode(QCP::srmNone), mSelectionRect(0), mOpenGl(false), mMouseHasMoved(false),
-      mMouseEventLayerable(0), mReplotting(false), mReplotQueued(false), mOpenGlMultisamples(16),
+      mSelectionRectMode(QCP::srmNone), mSelectionRect(nullptr), mOpenGl(false), mMouseHasMoved(false),
+      mMouseEventLayerable(nullptr), mReplotting(false), mReplotQueued(false), mOpenGlMultisamples(16),
       mOpenGlAntialiasedElementsBackup(QCP::aeNone), mOpenGlCacheLabelsBackup(true)
 {
     setAttribute(Qt::WA_NoMousePropagation);
     setAttribute(Qt::WA_OpaquePaintEvent);
     setAttribute(Qt::WA_AcceptTouchEvents);
     grabGesture(Qt::PinchGesture);
     setFocusPolicy(Qt::ClickFocus);
     setMouseTracking(true);
     QLocale currentLocale = locale();
     currentLocale.setNumberOptions(QLocale::OmitGroupSeparator);
     setLocale(currentLocale);
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
     setBufferDevicePixelRatio(QWidget::devicePixelRatio());
 #endif
 
     mOpenGlAntialiasedElementsBackup = mAntialiasedElements;
     mOpenGlCacheLabelsBackup         = mPlottingHints.testFlag(QCP::phCacheLabels);
     // create initial layers:
     mLayers.append(new QCPLayer(this, QLatin1String("background")));
     mLayers.append(new QCPLayer(this, QLatin1String("grid")));
     mLayers.append(new QCPLayer(this, QLatin1String("main")));
     mLayers.append(new QCPLayer(this, QLatin1String("axes")));
     mLayers.append(new QCPLayer(this, QLatin1String("legend")));
     mLayers.append(new QCPLayer(this, QLatin1String("overlay")));
     updateLayerIndices();
     setCurrentLayer(QLatin1String("main"));
     layer(QLatin1String("overlay"))->setMode(QCPLayer::lmBuffered);
 
     // create initial layout, axis rect and legend:
     mPlotLayout = new QCPLayoutGrid;
     mPlotLayout->initializeParentPlot(this);
     mPlotLayout->setParent(
         this); // important because if parent is QWidget, QCPLayout::sizeConstraintsChanged will call QWidget::updateGeometry
     mPlotLayout->setLayer(QLatin1String("main"));
     QCPAxisRect *defaultAxisRect = new QCPAxisRect(this, true);
     mPlotLayout->addElement(0, 0, defaultAxisRect);
     xAxis  = defaultAxisRect->axis(QCPAxis::atBottom);
     yAxis  = defaultAxisRect->axis(QCPAxis::atLeft);
     xAxis2 = defaultAxisRect->axis(QCPAxis::atTop);
     yAxis2 = defaultAxisRect->axis(QCPAxis::atRight);
     legend = new QCPLegend;
     legend->setVisible(false);
     defaultAxisRect->insetLayout()->addElement(legend, Qt::AlignRight | Qt::AlignTop);
     defaultAxisRect->insetLayout()->setMargins(QMargins(12, 12, 12, 12));
 
     defaultAxisRect->setLayer(QLatin1String("background"));
     xAxis->setLayer(QLatin1String("axes"));
     yAxis->setLayer(QLatin1String("axes"));
     xAxis2->setLayer(QLatin1String("axes"));
     yAxis2->setLayer(QLatin1String("axes"));
     xAxis->grid()->setLayer(QLatin1String("grid"));
     yAxis->grid()->setLayer(QLatin1String("grid"));
     xAxis2->grid()->setLayer(QLatin1String("grid"));
     yAxis2->grid()->setLayer(QLatin1String("grid"));
     legend->setLayer(QLatin1String("legend"));
 
     // create selection rect instance:
     mSelectionRect = new QCPSelectionRect(this);
     mSelectionRect->setLayer(QLatin1String("overlay"));
 
     setViewport(rect()); // needs to be called after mPlotLayout has been created
 
     replot(rpQueuedReplot);
 }
 
 QCustomPlot::~QCustomPlot()
 {
     clearPlottables();
     clearItems();
 
     if (mPlotLayout)
     {
         delete mPlotLayout;
-        mPlotLayout = 0;
+        mPlotLayout = nullptr;
     }
 
-    mCurrentLayer = 0;
+    mCurrentLayer = nullptr;
     qDeleteAll(mLayers); // don't use removeLayer, because it would prevent the last layer to be removed
     mLayers.clear();
 }
 
 /*!
   Sets which elements are forcibly drawn antialiased as an \a or combination of QCP::AntialiasedElement.
 
   This overrides the antialiasing settings for whole element groups, normally controlled with the
   \a setAntialiasing function on the individual elements. If an element is neither specified in
   \ref setAntialiasedElements nor in \ref setNotAntialiasedElements, the antialiasing setting on
   each individual element instance is used.
 
   For example, if \a antialiasedElements contains \ref QCP::aePlottables, all plottables will be
   drawn antialiased, no matter what the specific QCPAbstractPlottable::setAntialiased value was set
   to.
 
   if an element in \a antialiasedElements is already set in \ref setNotAntialiasedElements, it is
   removed from there.
 
   \see setNotAntialiasedElements
 */
 void QCustomPlot::setAntialiasedElements(const QCP::AntialiasedElements &antialiasedElements)
 {
     mAntialiasedElements = antialiasedElements;
 
     // make sure elements aren't in mNotAntialiasedElements and mAntialiasedElements simultaneously:
     if ((mNotAntialiasedElements & mAntialiasedElements) != 0)
         mNotAntialiasedElements |= ~mAntialiasedElements;
 }
 
 /*!
   Sets whether the specified \a antialiasedElement is forcibly drawn antialiased.
 
   See \ref setAntialiasedElements for details.
 
   \see setNotAntialiasedElement
 */
 void QCustomPlot::setAntialiasedElement(QCP::AntialiasedElement antialiasedElement, bool enabled)
 {
     if (!enabled && mAntialiasedElements.testFlag(antialiasedElement))
         mAntialiasedElements &= ~antialiasedElement;
     else if (enabled && !mAntialiasedElements.testFlag(antialiasedElement))
         mAntialiasedElements |= antialiasedElement;
 
     // make sure elements aren't in mNotAntialiasedElements and mAntialiasedElements simultaneously:
     if ((mNotAntialiasedElements & mAntialiasedElements) != 0)
         mNotAntialiasedElements |= ~mAntialiasedElements;
 }
 
 /*!
   Sets which elements are forcibly drawn not antialiased as an \a or combination of
   QCP::AntialiasedElement.
 
   This overrides the antialiasing settings for whole element groups, normally controlled with the
   \a setAntialiasing function on the individual elements. If an element is neither specified in
   \ref setAntialiasedElements nor in \ref setNotAntialiasedElements, the antialiasing setting on
   each individual element instance is used.
 
   For example, if \a notAntialiasedElements contains \ref QCP::aePlottables, no plottables will be
   drawn antialiased, no matter what the specific QCPAbstractPlottable::setAntialiased value was set
   to.
 
   if an element in \a notAntialiasedElements is already set in \ref setAntialiasedElements, it is
   removed from there.
 
   \see setAntialiasedElements
 */
 void QCustomPlot::setNotAntialiasedElements(const QCP::AntialiasedElements &notAntialiasedElements)
 {
     mNotAntialiasedElements = notAntialiasedElements;
 
     // make sure elements aren't in mNotAntialiasedElements and mAntialiasedElements simultaneously:
     if ((mNotAntialiasedElements & mAntialiasedElements) != 0)
         mAntialiasedElements |= ~mNotAntialiasedElements;
 }
 
 /*!
   Sets whether the specified \a notAntialiasedElement is forcibly drawn not antialiased.
 
   See \ref setNotAntialiasedElements for details.
 
   \see setAntialiasedElement
 */
 void QCustomPlot::setNotAntialiasedElement(QCP::AntialiasedElement notAntialiasedElement, bool enabled)
 {
     if (!enabled && mNotAntialiasedElements.testFlag(notAntialiasedElement))
         mNotAntialiasedElements &= ~notAntialiasedElement;
     else if (enabled && !mNotAntialiasedElements.testFlag(notAntialiasedElement))
         mNotAntialiasedElements |= notAntialiasedElement;
 
     // make sure elements aren't in mNotAntialiasedElements and mAntialiasedElements simultaneously:
     if ((mNotAntialiasedElements & mAntialiasedElements) != 0)
         mAntialiasedElements |= ~mNotAntialiasedElements;
 }
 
 /*!
   If set to true, adding a plottable (e.g. a graph) to the QCustomPlot automatically also adds the
   plottable to the legend (QCustomPlot::legend).
 
   \see addGraph, QCPLegend::addItem
 */
 void QCustomPlot::setAutoAddPlottableToLegend(bool on)
 {
     mAutoAddPlottableToLegend = on;
 }
 
 /*!
   Sets the possible interactions of this QCustomPlot as an or-combination of \ref QCP::Interaction
   enums. There are the following types of interactions:
 
   <b>Axis range manipulation</b> is controlled via \ref QCP::iRangeDrag and \ref QCP::iRangeZoom. When the
   respective interaction is enabled, the user may drag axes ranges and zoom with the mouse wheel.
   For details how to control which axes the user may drag/zoom and in what orientations, see \ref
   QCPAxisRect::setRangeDrag, \ref QCPAxisRect::setRangeZoom, \ref QCPAxisRect::setRangeDragAxes,
   \ref QCPAxisRect::setRangeZoomAxes.
 
   <b>Plottable data selection</b> is controlled by \ref QCP::iSelectPlottables. If \ref
   QCP::iSelectPlottables is set, the user may select plottables (graphs, curves, bars,...) and
   their data by clicking on them or in their vicinity (\ref setSelectionTolerance). Whether the
   user can actually select a plottable and its data can further be restricted with the \ref
   QCPAbstractPlottable::setSelectable method on the specific plottable. For details, see the
   special page about the \ref dataselection "data selection mechanism". To retrieve a list of all
   currently selected plottables, call \ref selectedPlottables. If you're only interested in
   QCPGraphs, you may use the convenience function \ref selectedGraphs.
 
   <b>Item selection</b> is controlled by \ref QCP::iSelectItems. If \ref QCP::iSelectItems is set, the user
   may select items (QCPItemLine, QCPItemText,...) by clicking on them or in their vicinity. To find
   out whether a specific item is selected, call QCPAbstractItem::selected(). To retrieve a list of
   all currently selected items, call \ref selectedItems.
 
   <b>Axis selection</b> is controlled with \ref QCP::iSelectAxes. If \ref QCP::iSelectAxes is set, the user
   may select parts of the axes by clicking on them. What parts exactly (e.g. Axis base line, tick
   labels, axis label) are selectable can be controlled via \ref QCPAxis::setSelectableParts for
   each axis. To retrieve a list of all axes that currently contain selected parts, call \ref
   selectedAxes. Which parts of an axis are selected, can be retrieved with QCPAxis::selectedParts().
 
   <b>Legend selection</b> is controlled with \ref QCP::iSelectLegend. If this is set, the user may
   select the legend itself or individual items by clicking on them. What parts exactly are
   selectable can be controlled via \ref QCPLegend::setSelectableParts. To find out whether the
   legend or any of its child items are selected, check the value of QCPLegend::selectedParts. To
   find out which child items are selected, call \ref QCPLegend::selectedItems.
 
   <b>All other selectable elements</b> The selection of all other selectable objects (e.g.
   QCPTextElement, or your own layerable subclasses) is controlled with \ref QCP::iSelectOther. If set, the
   user may select those objects by clicking on them. To find out which are currently selected, you
   need to check their selected state explicitly.
 
   If the selection state has changed by user interaction, the \ref selectionChangedByUser signal is
   emitted. Each selectable object additionally emits an individual selectionChanged signal whenever
   their selection state has changed, i.e. not only by user interaction.
 
   To allow multiple objects to be selected by holding the selection modifier (\ref
   setMultiSelectModifier), set the flag \ref QCP::iMultiSelect.
 
   \note In addition to the selection mechanism presented here, QCustomPlot always emits
   corresponding signals, when an object is clicked or double clicked. see \ref plottableClick and
   \ref plottableDoubleClick for example.
 
   \see setInteraction, setSelectionTolerance
 */
 void QCustomPlot::setInteractions(const QCP::Interactions &interactions)
 {
     mInteractions = interactions;
 }
 
 /*!
   Sets the single \a interaction of this QCustomPlot to \a enabled.
 
   For details about the interaction system, see \ref setInteractions.
 
   \see setInteractions
 */
 void QCustomPlot::setInteraction(const QCP::Interaction &interaction, bool enabled)
 {
     if (!enabled && mInteractions.testFlag(interaction))
         mInteractions &= ~interaction;
     else if (enabled && !mInteractions.testFlag(interaction))
         mInteractions |= interaction;
 }
 
 /*!
   Sets the tolerance that is used to decide whether a click selects an object (e.g. a plottable) or
   not.
 
   If the user clicks in the vicinity of the line of e.g. a QCPGraph, it's only regarded as a
   potential selection when the minimum distance between the click position and the graph line is
   smaller than \a pixels. Objects that are defined by an area (e.g. QCPBars) only react to clicks
   directly inside the area and ignore this selection tolerance. In other words, it only has meaning
   for parts of objects that are too thin to exactly hit with a click and thus need such a
   tolerance.
 
   \see setInteractions, QCPLayerable::selectTest
 */
 void QCustomPlot::setSelectionTolerance(int pixels)
 {
     mSelectionTolerance = pixels;
 }
 
 /*!
   Sets whether antialiasing is disabled for this QCustomPlot while the user is dragging axes
   ranges. If many objects, especially plottables, are drawn antialiased, this greatly improves
   performance during dragging. Thus it creates a more responsive user experience. As soon as the
   user stops dragging, the last replot is done with normal antialiasing, to restore high image
   quality.
 
   \see setAntialiasedElements, setNotAntialiasedElements
 */
 void QCustomPlot::setNoAntialiasingOnDrag(bool enabled)
 {
     mNoAntialiasingOnDrag = enabled;
 }
 
 /*!
   Sets the plotting hints for this QCustomPlot instance as an \a or combination of QCP::PlottingHint.
 
   \see setPlottingHint
 */
 void QCustomPlot::setPlottingHints(const QCP::PlottingHints &hints)
 {
     mPlottingHints = hints;
 }
 
 /*!
   Sets the specified plotting \a hint to \a enabled.
 
   \see setPlottingHints
 */
 void QCustomPlot::setPlottingHint(QCP::PlottingHint hint, bool enabled)
 {
     QCP::PlottingHints newHints = mPlottingHints;
     if (!enabled)
         newHints &= ~hint;
     else
         newHints |= hint;
 
     if (newHints != mPlottingHints)
         setPlottingHints(newHints);
 }
 
 /*!
   Sets the keyboard modifier that will be recognized as multi-select-modifier.
 
   If \ref QCP::iMultiSelect is specified in \ref setInteractions, the user may select multiple
   objects (or data points) by clicking on them one after the other while holding down \a modifier.
 
   By default the multi-select-modifier is set to Qt::ControlModifier.
 
   \see setInteractions
 */
 void QCustomPlot::setMultiSelectModifier(Qt::KeyboardModifier modifier)
 {
     mMultiSelectModifier = modifier;
 }
 
 /*!
   Sets how QCustomPlot processes mouse click-and-drag interactions by the user.
 
   If \a mode is \ref QCP::srmNone, the mouse drag is forwarded to the underlying objects. For
   example, QCPAxisRect may process a mouse drag by dragging axis ranges, see \ref
   QCPAxisRect::setRangeDrag. If \a mode is not \ref QCP::srmNone, the current selection rect (\ref
   selectionRect) becomes activated and allows e.g. rect zooming and data point selection.
 
   If you wish to provide your user both with axis range dragging and data selection/range zooming,
   use this method to switch between the modes just before the interaction is processed, e.g. in
   reaction to the \ref mousePress or \ref mouseMove signals. For example you could check whether
   the user is holding a certain keyboard modifier, and then decide which \a mode shall be set.
 
   If a selection rect interaction is currently active, and \a mode is set to \ref QCP::srmNone, the
   interaction is canceled (\ref QCPSelectionRect::cancel). Switching between any of the other modes
   will keep the selection rect active. Upon completion of the interaction, the behaviour is as
   defined by the currently set \a mode, not the mode that was set when the interaction started.
 
   \see setInteractions, setSelectionRect, QCPSelectionRect
 */
 void QCustomPlot::setSelectionRectMode(QCP::SelectionRectMode mode)
 {
     if (mSelectionRect)
     {
         if (mode == QCP::srmNone)
             mSelectionRect
                 ->cancel(); // when switching to none, we immediately want to abort a potentially active selection rect
 
         // disconnect old connections:
         if (mSelectionRectMode == QCP::srmSelect)
             disconnect(mSelectionRect, SIGNAL(accepted(QRect, QMouseEvent *)), this,
                        SLOT(processRectSelection(QRect, QMouseEvent *)));
         else if (mSelectionRectMode == QCP::srmZoom)
             disconnect(mSelectionRect, SIGNAL(accepted(QRect, QMouseEvent *)), this,
                        SLOT(processRectZoom(QRect, QMouseEvent *)));
 
         // establish new ones:
         if (mode == QCP::srmSelect)
             connect(mSelectionRect, SIGNAL(accepted(QRect, QMouseEvent *)), this,
                     SLOT(processRectSelection(QRect, QMouseEvent *)));
         else if (mode == QCP::srmZoom)
             connect(mSelectionRect, SIGNAL(accepted(QRect, QMouseEvent *)), this,
                     SLOT(processRectZoom(QRect, QMouseEvent *)));
     }
 
     mSelectionRectMode = mode;
 }
 
 /*!
   Sets the \ref QCPSelectionRect instance that QCustomPlot will use if \a mode is not \ref
   QCP::srmNone and the user performs a click-and-drag interaction. QCustomPlot takes ownership of
   the passed \a selectionRect. It can be accessed later via \ref selectionRect.
 
   This method is useful if you wish to replace the default QCPSelectionRect instance with an
   instance of a QCPSelectionRect subclass, to introduce custom behaviour of the selection rect.
 
   \see setSelectionRectMode
 */
 void QCustomPlot::setSelectionRect(QCPSelectionRect *selectionRect)
 {
     if (mSelectionRect)
         delete mSelectionRect;
 
     mSelectionRect = selectionRect;
 
     if (mSelectionRect)
     {
         // establish connections with new selection rect:
         if (mSelectionRectMode == QCP::srmSelect)
             connect(mSelectionRect, SIGNAL(accepted(QRect, QMouseEvent *)), this,
                     SLOT(processRectSelection(QRect, QMouseEvent *)));
         else if (mSelectionRectMode == QCP::srmZoom)
             connect(mSelectionRect, SIGNAL(accepted(QRect, QMouseEvent *)), this,
                     SLOT(processRectZoom(QRect, QMouseEvent *)));
     }
 }
 
 /*!
   This method allows to enable OpenGL plot rendering, for increased plotting performance of
   graphically demanding plots (thick lines, translucent fills, etc.).
 
   If \a enabled is set to true, QCustomPlot will try to initialize OpenGL and, if successful,
   continue plotting with hardware acceleration. The parameter \a multisampling controls how many
   samples will be used per pixel, it essentially controls the antialiasing quality. If \a
   multisampling is set too high for the current graphics hardware, the maximum allowed value will
   be used.
 
   You can test whether switching to OpenGL rendering was successful by checking whether the
   according getter \a QCustomPlot::openGl() returns true. If the OpenGL initialization fails,
   rendering continues with the regular software rasterizer, and an according qDebug output is
   generated.
 
   If switching to OpenGL was successful, this method disables label caching (\ref setPlottingHint
   "setPlottingHint(QCP::phCacheLabels, false)") and turns on QCustomPlot's antialiasing override
   for all elements (\ref setAntialiasedElements "setAntialiasedElements(QCP::aeAll)"), leading to a
   higher quality output. The antialiasing override allows for pixel-grid aligned drawing in the
   OpenGL paint device. As stated before, in OpenGL rendering the actual antialiasing of the plot is
   controlled with \a multisampling. If \a enabled is set to false, the antialiasing/label caching
   settings are restored to what they were before OpenGL was enabled, if they weren't altered in the
   meantime.
 
   \note OpenGL support is only enabled if QCustomPlot is compiled with the macro \c QCUSTOMPLOT_USE_OPENGL
   defined. This define must be set before including the QCustomPlot header both during compilation
   of the QCustomPlot library as well as when compiling your application. It is best to just include
   the line <tt>DEFINES += QCUSTOMPLOT_USE_OPENGL</tt> in the respective qmake project files.
   \note If you are using a Qt version before 5.0, you must also add the module "opengl" to your \c
   QT variable in the qmake project files. For Qt versions 5.0 and higher, QCustomPlot switches to a
   newer OpenGL interface which is already in the "gui" module.
 */
 void QCustomPlot::setOpenGl(bool enabled, int multisampling)
 {
     mOpenGlMultisamples = qMax(0, multisampling);
 #ifdef QCUSTOMPLOT_USE_OPENGL
     mOpenGl = enabled;
     if (mOpenGl)
     {
         if (setupOpenGl())
         {
             // backup antialiasing override and labelcaching setting so we can restore upon disabling OpenGL
             mOpenGlAntialiasedElementsBackup = mAntialiasedElements;
             mOpenGlCacheLabelsBackup         = mPlottingHints.testFlag(QCP::phCacheLabels);
             // set antialiasing override to antialias all (aligns gl pixel grid properly), and disable label caching (would use software rasterizer for pixmap caches):
             setAntialiasedElements(QCP::aeAll);
             setPlottingHint(QCP::phCacheLabels, false);
         }
         else
         {
             qDebug() << Q_FUNC_INFO << "Failed to enable OpenGL, continuing plotting without hardware acceleration.";
             mOpenGl = false;
         }
     }
     else
     {
         // restore antialiasing override and labelcaching to what it was before enabling OpenGL, if nobody changed it in the meantime:
         if (mAntialiasedElements == QCP::aeAll)
             setAntialiasedElements(mOpenGlAntialiasedElementsBackup);
         if (!mPlottingHints.testFlag(QCP::phCacheLabels))
             setPlottingHint(QCP::phCacheLabels, mOpenGlCacheLabelsBackup);
         freeOpenGl();
     }
     // recreate all paint buffers:
     mPaintBuffers.clear();
     setupPaintBuffers();
 #else
     Q_UNUSED(enabled)
     qDebug() << Q_FUNC_INFO
              << "QCustomPlot can't use OpenGL because QCUSTOMPLOT_USE_OPENGL was not defined during compilation (add "
                 "'DEFINES += QCUSTOMPLOT_USE_OPENGL' to your qmake .pro file)";
 #endif
 }
 
 /*!
   Sets the viewport of this QCustomPlot. Usually users of QCustomPlot don't need to change the
   viewport manually.
 
   The viewport is the area in which the plot is drawn. All mechanisms, e.g. margin caluclation take
   the viewport to be the outer border of the plot. The viewport normally is the rect() of the
   QCustomPlot widget, i.e. a rect with top left (0, 0) and size of the QCustomPlot widget.
 
   Don't confuse the viewport with the axis rect (QCustomPlot::axisRect). An axis rect is typically
   an area enclosed by four axes, where the graphs/plottables are drawn in. The viewport is larger
   and contains also the axes themselves, their tick numbers, their labels, or even additional axis
   rects, color scales and other layout elements.
 
   This function is used to allow arbitrary size exports with \ref toPixmap, \ref savePng, \ref
   savePdf, etc. by temporarily changing the viewport size.
 */
 void QCustomPlot::setViewport(const QRect &rect)
 {
     mViewport = rect;
     if (mPlotLayout)
         mPlotLayout->setOuterRect(mViewport);
 }
 
 /*!
   Sets the device pixel ratio used by the paint buffers of this QCustomPlot instance.
 
   Normally, this doesn't need to be set manually, because it is initialized with the regular \a
   QWidget::devicePixelRatio which is configured by Qt to fit the display device (e.g. 1 for normal
   displays, 2 for High-DPI displays).
 
   Device pixel ratios are supported by Qt only for Qt versions since 5.4. If this method is called
   when QCustomPlot is being used with older Qt versions, outputs an according qDebug message and
   leaves the internal buffer device pixel ratio at 1.0.
 */
 void QCustomPlot::setBufferDevicePixelRatio(double ratio)
 {
     if (!qFuzzyCompare(ratio, mBufferDevicePixelRatio))
     {
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
         mBufferDevicePixelRatio = ratio;
         for (int i = 0; i < mPaintBuffers.size(); ++i)
             mPaintBuffers.at(i)->setDevicePixelRatio(mBufferDevicePixelRatio);
 // Note: axis label cache has devicePixelRatio as part of cache hash, so no need to manually clear cache here
 #else
         qDebug() << Q_FUNC_INFO << "Device pixel ratios not supported for Qt versions before 5.4";
         mBufferDevicePixelRatio = 1.0;
 #endif
     }
 }
 
 /*!
   Sets \a pm as the viewport background pixmap (see \ref setViewport). The pixmap is always drawn
   below all other objects in the plot.
 
   For cases where the provided pixmap doesn't have the same size as the viewport, scaling can be
   enabled with \ref setBackgroundScaled and the scaling mode (whether and how the aspect ratio is
   preserved) can be set with \ref setBackgroundScaledMode. To set all these options in one call,
   consider using the overloaded version of this function.
 
   If a background brush was set with \ref setBackground(const QBrush &brush), the viewport will
   first be filled with that brush, before drawing the background pixmap. This can be useful for
   background pixmaps with translucent areas.
 
   \see setBackgroundScaled, setBackgroundScaledMode
 */
 void QCustomPlot::setBackground(const QPixmap &pm)
 {
     mBackgroundPixmap       = pm;
     mScaledBackgroundPixmap = QPixmap();
 }
 
 /*!
   Sets the background brush of the viewport (see \ref setViewport).
 
   Before drawing everything else, the background is filled with \a brush. If a background pixmap
   was set with \ref setBackground(const QPixmap &pm), this brush will be used to fill the viewport
   before the background pixmap is drawn. This can be useful for background pixmaps with translucent
   areas.
 
   Set \a brush to Qt::NoBrush or Qt::Transparent to leave background transparent. This can be
   useful for exporting to image formats which support transparency, e.g. \ref savePng.
 
   \see setBackgroundScaled, setBackgroundScaledMode
 */
 void QCustomPlot::setBackground(const QBrush &brush)
 {
     mBackgroundBrush = brush;
 }
 
 /*! \overload
 
   Allows setting the background pixmap of the viewport, whether it shall be scaled and how it
   shall be scaled in one call.
 
   \see setBackground(const QPixmap &pm), setBackgroundScaled, setBackgroundScaledMode
 */
 void QCustomPlot::setBackground(const QPixmap &pm, bool scaled, Qt::AspectRatioMode mode)
 {
     mBackgroundPixmap       = pm;
     mScaledBackgroundPixmap = QPixmap();
     mBackgroundScaled       = scaled;
     mBackgroundScaledMode   = mode;
 }
 
 /*!
   Sets whether the viewport background pixmap shall be scaled to fit the viewport. If \a scaled is
   set to true, control whether and how the aspect ratio of the original pixmap is preserved with
   \ref setBackgroundScaledMode.
 
   Note that the scaled version of the original pixmap is buffered, so there is no performance
   penalty on replots. (Except when the viewport dimensions are changed continuously.)
 
   \see setBackground, setBackgroundScaledMode
 */
 void QCustomPlot::setBackgroundScaled(bool scaled)
 {
     mBackgroundScaled = scaled;
 }
 
 /*!
   If scaling of the viewport background pixmap is enabled (\ref setBackgroundScaled), use this
   function to define whether and how the aspect ratio of the original pixmap is preserved.
 
   \see setBackground, setBackgroundScaled
 */
 void QCustomPlot::setBackgroundScaledMode(Qt::AspectRatioMode mode)
 {
     mBackgroundScaledMode = mode;
 }
 
 /*!
   Returns the plottable with \a index. If the index is invalid, returns 0.
 
   There is an overloaded version of this function with no parameter which returns the last added
   plottable, see QCustomPlot::plottable()
 
   \see plottableCount
 */
 QCPAbstractPlottable *QCustomPlot::plottable(int index)
 {
     if (index >= 0 && index < mPlottables.size())
     {
         return mPlottables.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*! \overload
 
   Returns the last plottable that was added to the plot. If there are no plottables in the plot,
   returns 0.
 
   \see plottableCount
 */
 QCPAbstractPlottable *QCustomPlot::plottable()
 {
     if (!mPlottables.isEmpty())
     {
         return mPlottables.last();
     }
     else
-        return 0;
+        return nullptr;
 }
 
 /*!
   Removes the specified plottable from the plot and deletes it. If necessary, the corresponding
   legend item is also removed from the default legend (QCustomPlot::legend).
 
   Returns true on success.
 
   \see clearPlottables
 */
 bool QCustomPlot::removePlottable(QCPAbstractPlottable *plottable)
 {
     if (!mPlottables.contains(plottable))
     {
         qDebug() << Q_FUNC_INFO << "plottable not in list:" << reinterpret_cast<quintptr>(plottable);
         return false;
     }
 
     // remove plottable from legend:
     plottable->removeFromLegend();
     // special handling for QCPGraphs to maintain the simple graph interface:
     if (QCPGraph *graph = qobject_cast<QCPGraph *>(plottable))
         mGraphs.removeOne(graph);
     // remove plottable:
     delete plottable;
     mPlottables.removeOne(plottable);
     return true;
 }
 
 /*! \overload
 
   Removes and deletes the plottable by its \a index.
 */
 bool QCustomPlot::removePlottable(int index)
 {
     if (index >= 0 && index < mPlottables.size())
         return removePlottable(mPlottables[index]);
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
         return false;
     }
 }
 
 /*!
   Removes all plottables from the plot and deletes them. Corresponding legend items are also
   removed from the default legend (QCustomPlot::legend).
 
   Returns the number of plottables removed.
 
   \see removePlottable
 */
 int QCustomPlot::clearPlottables()
 {
     int c = mPlottables.size();
     for (int i = c - 1; i >= 0; --i)
         removePlottable(mPlottables[i]);
     return c;
 }
 
 /*!
   Returns the number of currently existing plottables in the plot
 
   \see plottable
 */
 int QCustomPlot::plottableCount() const
 {
     return mPlottables.size();
 }
 
 /*!
   Returns a list of the selected plottables. If no plottables are currently selected, the list is empty.
 
   There is a convenience function if you're only interested in selected graphs, see \ref selectedGraphs.
 
   \see setInteractions, QCPAbstractPlottable::setSelectable, QCPAbstractPlottable::setSelection
 */
 QList<QCPAbstractPlottable *> QCustomPlot::selectedPlottables() const
 {
     QList<QCPAbstractPlottable *> result;
     foreach (QCPAbstractPlottable *plottable, mPlottables)
     {
         if (plottable->selected())
             result.append(plottable);
     }
     return result;
 }
 
 /*!
   Returns the plottable at the pixel position \a pos. Plottables that only consist of single lines
   (like graphs) have a tolerance band around them, see \ref setSelectionTolerance. If multiple
   plottables come into consideration, the one closest to \a pos is returned.
 
   If \a onlySelectable is true, only plottables that are selectable
   (QCPAbstractPlottable::setSelectable) are considered.
 
   If there is no plottable at \a pos, the return value is 0.
 
   \see itemAt, layoutElementAt
 */
 QCPAbstractPlottable *QCustomPlot::plottableAt(const QPointF &pos, bool onlySelectable) const
 {
-    QCPAbstractPlottable *resultPlottable = 0;
+    QCPAbstractPlottable *resultPlottable = nullptr;
     double resultDistance =
         mSelectionTolerance; // only regard clicks with distances smaller than mSelectionTolerance as selections, so initialize with that value
 
     foreach (QCPAbstractPlottable *plottable, mPlottables)
     {
         if (onlySelectable &&
             !plottable
                  ->selectable()) // we could have also passed onlySelectable to the selectTest function, but checking here is faster, because we have access to QCPabstractPlottable::selectable
             continue;
         if ((plottable->keyAxis()->axisRect()->rect() & plottable->valueAxis()->axisRect()->rect())
                 .contains(
                     pos.toPoint())) // only consider clicks inside the rect that is spanned by the plottable's key/value axes
         {
             double currentDistance = plottable->selectTest(pos, false);
             if (currentDistance >= 0 && currentDistance < resultDistance)
             {
                 resultPlottable = plottable;
                 resultDistance  = currentDistance;
             }
         }
     }
 
     return resultPlottable;
 }
 
 /*!
   Returns whether this QCustomPlot instance contains the \a plottable.
 */
 bool QCustomPlot::hasPlottable(QCPAbstractPlottable *plottable) const
 {
     return mPlottables.contains(plottable);
 }
 
 /*!
   Returns the graph with \a index. If the index is invalid, returns 0.
 
   There is an overloaded version of this function with no parameter which returns the last created
   graph, see QCustomPlot::graph()
 
   \see graphCount, addGraph
 */
 QCPGraph *QCustomPlot::graph(int index) const
 {
     if (index >= 0 && index < mGraphs.size())
     {
         return mGraphs.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*! \overload
 
   Returns the last graph, that was created with \ref addGraph. If there are no graphs in the plot,
   returns 0.
 
   \see graphCount, addGraph
 */
 QCPGraph *QCustomPlot::graph() const
 {
     if (!mGraphs.isEmpty())
     {
         return mGraphs.last();
     }
     else
-        return 0;
+        return nullptr;
 }
 
 /*!
   Creates a new graph inside the plot. If \a keyAxis and \a valueAxis are left unspecified (0), the
   bottom (xAxis) is used as key and the left (yAxis) is used as value axis. If specified, \a
   keyAxis and \a valueAxis must reside in this QCustomPlot.
 
   \a keyAxis will be used as key axis (typically "x") and \a valueAxis as value axis (typically
   "y") for the graph.
 
   Returns a pointer to the newly created graph, or 0 if adding the graph failed.
 
   \see graph, graphCount, removeGraph, clearGraphs
 */
 QCPGraph *QCustomPlot::addGraph(QCPAxis *keyAxis, QCPAxis *valueAxis)
 {
     if (!keyAxis)
         keyAxis = xAxis;
     if (!valueAxis)
         valueAxis = yAxis;
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO
                  << "can't use default QCustomPlot xAxis or yAxis, because at least one is invalid (has been deleted)";
-        return 0;
+        return nullptr;
     }
     if (keyAxis->parentPlot() != this || valueAxis->parentPlot() != this)
     {
         qDebug() << Q_FUNC_INFO << "passed keyAxis or valueAxis doesn't have this QCustomPlot as parent";
-        return 0;
+        return nullptr;
     }
 
     QCPGraph *newGraph = new QCPGraph(keyAxis, valueAxis);
     newGraph->setName(QLatin1String("Graph ") + QString::number(mGraphs.size()));
     return newGraph;
 }
 
 /*!
   Removes the specified \a graph from the plot and deletes it. If necessary, the corresponding
   legend item is also removed from the default legend (QCustomPlot::legend). If any other graphs in
   the plot have a channel fill set towards the removed graph, the channel fill property of those
   graphs is reset to zero (no channel fill).
 
   Returns true on success.
 
   \see clearGraphs
 */
 bool QCustomPlot::removeGraph(QCPGraph *graph)
 {
     return removePlottable(graph);
 }
 
 /*! \overload
 
   Removes and deletes the graph by its \a index.
 */
 bool QCustomPlot::removeGraph(int index)
 {
     if (index >= 0 && index < mGraphs.size())
         return removeGraph(mGraphs[index]);
     else
         return false;
 }
 
 /*!
   Removes all graphs from the plot and deletes them. Corresponding legend items are also removed
   from the default legend (QCustomPlot::legend).
 
   Returns the number of graphs removed.
 
   \see removeGraph
 */
 int QCustomPlot::clearGraphs()
 {
     int c = mGraphs.size();
     for (int i = c - 1; i >= 0; --i)
         removeGraph(mGraphs[i]);
     return c;
 }
 
 /*!
   Returns the number of currently existing graphs in the plot
 
   \see graph, addGraph
 */
 int QCustomPlot::graphCount() const
 {
     return mGraphs.size();
 }
 
 /*!
   Returns a list of the selected graphs. If no graphs are currently selected, the list is empty.
 
   If you are not only interested in selected graphs but other plottables like QCPCurve, QCPBars,
   etc., use \ref selectedPlottables.
 
   \see setInteractions, selectedPlottables, QCPAbstractPlottable::setSelectable, QCPAbstractPlottable::setSelection
 */
 QList<QCPGraph *> QCustomPlot::selectedGraphs() const
 {
     QList<QCPGraph *> result;
     foreach (QCPGraph *graph, mGraphs)
     {
         if (graph->selected())
             result.append(graph);
     }
     return result;
 }
 
 /*!
   Returns the item with \a index. If the index is invalid, returns 0.
 
   There is an overloaded version of this function with no parameter which returns the last added
   item, see QCustomPlot::item()
 
   \see itemCount
 */
 QCPAbstractItem *QCustomPlot::item(int index) const
 {
     if (index >= 0 && index < mItems.size())
     {
         return mItems.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*! \overload
 
   Returns the last item that was added to this plot. If there are no items in the plot,
   returns 0.
 
   \see itemCount
 */
 QCPAbstractItem *QCustomPlot::item() const
 {
     if (!mItems.isEmpty())
     {
         return mItems.last();
     }
     else
-        return 0;
+        return nullptr;
 }
 
 /*!
   Removes the specified item from the plot and deletes it.
 
   Returns true on success.
 
   \see clearItems
 */
 bool QCustomPlot::removeItem(QCPAbstractItem *item)
 {
     if (mItems.contains(item))
     {
         delete item;
         mItems.removeOne(item);
         return true;
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "item not in list:" << reinterpret_cast<quintptr>(item);
         return false;
     }
 }
 
 /*! \overload
 
   Removes and deletes the item by its \a index.
 */
 bool QCustomPlot::removeItem(int index)
 {
     if (index >= 0 && index < mItems.size())
         return removeItem(mItems[index]);
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
         return false;
     }
 }
 
 /*!
   Removes all items from the plot and deletes them.
 
   Returns the number of items removed.
 
   \see removeItem
 */
 int QCustomPlot::clearItems()
 {
     int c = mItems.size();
     for (int i = c - 1; i >= 0; --i)
         removeItem(mItems[i]);
     return c;
 }
 
 /*!
   Returns the number of currently existing items in the plot
 
   \see item
 */
 int QCustomPlot::itemCount() const
 {
     return mItems.size();
 }
 
 /*!
   Returns a list of the selected items. If no items are currently selected, the list is empty.
 
   \see setInteractions, QCPAbstractItem::setSelectable, QCPAbstractItem::setSelected
 */
 QList<QCPAbstractItem *> QCustomPlot::selectedItems() const
 {
     QList<QCPAbstractItem *> result;
     foreach (QCPAbstractItem *item, mItems)
     {
         if (item->selected())
             result.append(item);
     }
     return result;
 }
 
 /*!
   Returns the item at the pixel position \a pos. Items that only consist of single lines (e.g. \ref
   QCPItemLine or \ref QCPItemCurve) have a tolerance band around them, see \ref
   setSelectionTolerance. If multiple items come into consideration, the one closest to \a pos is
   returned.
 
   If \a onlySelectable is true, only items that are selectable (QCPAbstractItem::setSelectable) are
   considered.
 
   If there is no item at \a pos, the return value is 0.
 
   \see plottableAt, layoutElementAt
 */
 QCPAbstractItem *QCustomPlot::itemAt(const QPointF &pos, bool onlySelectable) const
 {
-    QCPAbstractItem *resultItem = 0;
+    QCPAbstractItem *resultItem = nullptr;
     double resultDistance =
         mSelectionTolerance; // only regard clicks with distances smaller than mSelectionTolerance as selections, so initialize with that value
 
     foreach (QCPAbstractItem *item, mItems)
     {
         if (onlySelectable &&
             !item->selectable()) // we could have also passed onlySelectable to the selectTest function, but checking here is faster, because we have access to QCPAbstractItem::selectable
             continue;
         if (!item->clipToAxisRect() ||
             item->clipRect().contains(
                 pos.toPoint())) // only consider clicks inside axis cliprect of the item if actually clipped to it
         {
             double currentDistance = item->selectTest(pos, false);
             if (currentDistance >= 0 && currentDistance < resultDistance)
             {
                 resultItem     = item;
                 resultDistance = currentDistance;
             }
         }
     }
 
     return resultItem;
 }
 
 /*!
   Returns whether this QCustomPlot contains the \a item.
 
   \see item
 */
 bool QCustomPlot::hasItem(QCPAbstractItem *item) const
 {
     return mItems.contains(item);
 }
 
 /*!
   Returns the layer with the specified \a name. If there is no layer with the specified name, 0 is
   returned.
 
   Layer names are case-sensitive.
 
   \see addLayer, moveLayer, removeLayer
 */
 QCPLayer *QCustomPlot::layer(const QString &name) const
 {
     foreach (QCPLayer *layer, mLayers)
     {
         if (layer->name() == name)
             return layer;
     }
-    return 0;
+    return nullptr;
 }
 
 /*! \overload
 
   Returns the layer by \a index. If the index is invalid, 0 is returned.
 
   \see addLayer, moveLayer, removeLayer
 */
 QCPLayer *QCustomPlot::layer(int index) const
 {
     if (index >= 0 && index < mLayers.size())
     {
         return mLayers.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*!
   Returns the layer that is set as current layer (see \ref setCurrentLayer).
 */
 QCPLayer *QCustomPlot::currentLayer() const
 {
     return mCurrentLayer;
 }
 
 /*!
   Sets the layer with the specified \a name to be the current layer. All layerables (\ref
   QCPLayerable), e.g. plottables and items, are created on the current layer.
 
   Returns true on success, i.e. if there is a layer with the specified \a name in the QCustomPlot.
 
   Layer names are case-sensitive.
 
   \see addLayer, moveLayer, removeLayer, QCPLayerable::setLayer
 */
 bool QCustomPlot::setCurrentLayer(const QString &name)
 {
     if (QCPLayer *newCurrentLayer = layer(name))
     {
         return setCurrentLayer(newCurrentLayer);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "layer with name doesn't exist:" << name;
         return false;
     }
 }
 
 /*! \overload
 
   Sets the provided \a layer to be the current layer.
 
   Returns true on success, i.e. when \a layer is a valid layer in the QCustomPlot.
 
   \see addLayer, moveLayer, removeLayer
 */
 bool QCustomPlot::setCurrentLayer(QCPLayer *layer)
 {
     if (!mLayers.contains(layer))
     {
         qDebug() << Q_FUNC_INFO << "layer not a layer of this QCustomPlot:" << reinterpret_cast<quintptr>(layer);
         return false;
     }
 
     mCurrentLayer = layer;
     return true;
 }
 
 /*!
   Returns the number of currently existing layers in the plot
 
   \see layer, addLayer
 */
 int QCustomPlot::layerCount() const
 {
     return mLayers.size();
 }
 
 /*!
   Adds a new layer to this QCustomPlot instance. The new layer will have the name \a name, which
   must be unique. Depending on \a insertMode, it is positioned either below or above \a otherLayer.
 
   Returns true on success, i.e. if there is no other layer named \a name and \a otherLayer is a
   valid layer inside this QCustomPlot.
 
   If \a otherLayer is 0, the highest layer in the QCustomPlot will be used.
 
   For an explanation of what layers are in QCustomPlot, see the documentation of \ref QCPLayer.
 
   \see layer, moveLayer, removeLayer
 */
 bool QCustomPlot::addLayer(const QString &name, QCPLayer *otherLayer, QCustomPlot::LayerInsertMode insertMode)
 {
     if (!otherLayer)
         otherLayer = mLayers.last();
     if (!mLayers.contains(otherLayer))
     {
         qDebug() << Q_FUNC_INFO
                  << "otherLayer not a layer of this QCustomPlot:" << reinterpret_cast<quintptr>(otherLayer);
         return false;
     }
     if (layer(name))
     {
         qDebug() << Q_FUNC_INFO << "A layer exists already with the name" << name;
         return false;
     }
 
     QCPLayer *newLayer = new QCPLayer(this, name);
     mLayers.insert(otherLayer->index() + (insertMode == limAbove ? 1 : 0), newLayer);
     updateLayerIndices();
     setupPaintBuffers(); // associates new layer with the appropriate paint buffer
     return true;
 }
 
 /*!
   Removes the specified \a layer and returns true on success.
 
   All layerables (e.g. plottables and items) on the removed layer will be moved to the layer below
   \a layer. If \a layer is the bottom layer, the layerables are moved to the layer above. In both
   cases, the total rendering order of all layerables in the QCustomPlot is preserved.
 
   If \a layer is the current layer (\ref setCurrentLayer), the layer below (or above, if bottom
   layer) becomes the new current layer.
 
   It is not possible to remove the last layer of the plot.
 
   \see layer, addLayer, moveLayer
 */
 bool QCustomPlot::removeLayer(QCPLayer *layer)
 {
     if (!mLayers.contains(layer))
     {
         qDebug() << Q_FUNC_INFO << "layer not a layer of this QCustomPlot:" << reinterpret_cast<quintptr>(layer);
         return false;
     }
     if (mLayers.size() < 2)
     {
         qDebug() << Q_FUNC_INFO << "can't remove last layer";
         return false;
     }
 
     // append all children of this layer to layer below (if this is lowest layer, prepend to layer above)
     int removedIndex               = layer->index();
     bool isFirstLayer              = removedIndex == 0;
     QCPLayer *targetLayer          = isFirstLayer ? mLayers.at(removedIndex + 1) : mLayers.at(removedIndex - 1);
     QList<QCPLayerable *> children = layer->children();
     if (isFirstLayer) // prepend in reverse order (so order relative to each other stays the same)
     {
         for (int i = children.size() - 1; i >= 0; --i)
             children.at(i)->moveToLayer(targetLayer, true);
     }
     else // append normally
     {
         for (int i = 0; i < children.size(); ++i)
             children.at(i)->moveToLayer(targetLayer, false);
     }
     // if removed layer is current layer, change current layer to layer below/above:
     if (layer == mCurrentLayer)
         setCurrentLayer(targetLayer);
     // invalidate the paint buffer that was responsible for this layer:
     if (!layer->mPaintBuffer.isNull())
         layer->mPaintBuffer.data()->setInvalidated();
     // remove layer:
     delete layer;
     mLayers.removeOne(layer);
     updateLayerIndices();
     return true;
 }
 
 /*!
   Moves the specified \a layer either above or below \a otherLayer. Whether it's placed above or
   below is controlled with \a insertMode.
 
   Returns true on success, i.e. when both \a layer and \a otherLayer are valid layers in the
   QCustomPlot.
 
   \see layer, addLayer, moveLayer
 */
 bool QCustomPlot::moveLayer(QCPLayer *layer, QCPLayer *otherLayer, QCustomPlot::LayerInsertMode insertMode)
 {
     if (!mLayers.contains(layer))
     {
         qDebug() << Q_FUNC_INFO << "layer not a layer of this QCustomPlot:" << reinterpret_cast<quintptr>(layer);
         return false;
     }
     if (!mLayers.contains(otherLayer))
     {
         qDebug() << Q_FUNC_INFO
                  << "otherLayer not a layer of this QCustomPlot:" << reinterpret_cast<quintptr>(otherLayer);
         return false;
     }
 
     if (layer->index() > otherLayer->index())
         mLayers.move(layer->index(), otherLayer->index() + (insertMode == limAbove ? 1 : 0));
     else if (layer->index() < otherLayer->index())
         mLayers.move(layer->index(), otherLayer->index() + (insertMode == limAbove ? 0 : -1));
 
     // invalidate the paint buffers that are responsible for the layers:
     if (!layer->mPaintBuffer.isNull())
         layer->mPaintBuffer.data()->setInvalidated();
     if (!otherLayer->mPaintBuffer.isNull())
         otherLayer->mPaintBuffer.data()->setInvalidated();
 
     updateLayerIndices();
     return true;
 }
 
 /*!
   Returns the number of axis rects in the plot.
 
   All axis rects can be accessed via QCustomPlot::axisRect().
 
   Initially, only one axis rect exists in the plot.
 
   \see axisRect, axisRects
 */
 int QCustomPlot::axisRectCount() const
 {
     return axisRects().size();
 }
 
 /*!
   Returns the axis rect with \a index.
 
   Initially, only one axis rect (with index 0) exists in the plot. If multiple axis rects were
   added, all of them may be accessed with this function in a linear fashion (even when they are
   nested in a layout hierarchy or inside other axis rects via QCPAxisRect::insetLayout).
 
   \see axisRectCount, axisRects
 */
 QCPAxisRect *QCustomPlot::axisRect(int index) const
 {
     const QList<QCPAxisRect *> rectList = axisRects();
     if (index >= 0 && index < rectList.size())
     {
         return rectList.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "invalid axis rect index" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*!
   Returns all axis rects in the plot.
 
   \see axisRectCount, axisRect
 */
 QList<QCPAxisRect *> QCustomPlot::axisRects() const
 {
     QList<QCPAxisRect *> result;
     QStack<QCPLayoutElement *> elementStack;
     if (mPlotLayout)
         elementStack.push(mPlotLayout);
 
     while (!elementStack.isEmpty())
     {
         foreach (QCPLayoutElement *element, elementStack.pop()->elements(false))
         {
             if (element)
             {
                 elementStack.push(element);
                 if (QCPAxisRect *ar = qobject_cast<QCPAxisRect *>(element))
                     result.append(ar);
             }
         }
     }
 
     return result;
 }
 
 /*!
   Returns the layout element at pixel position \a pos. If there is no element at that position,
   returns 0.
 
   Only visible elements are used. If \ref QCPLayoutElement::setVisible on the element itself or on
   any of its parent elements is set to false, it will not be considered.
 
   \see itemAt, plottableAt
 */
 QCPLayoutElement *QCustomPlot::layoutElementAt(const QPointF &pos) const
 {
     QCPLayoutElement *currentElement = mPlotLayout;
     bool searchSubElements           = true;
     while (searchSubElements && currentElement)
     {
         searchSubElements = false;
         foreach (QCPLayoutElement *subElement, currentElement->elements(false))
         {
             if (subElement && subElement->realVisibility() && subElement->selectTest(pos, false) >= 0)
             {
                 currentElement    = subElement;
                 searchSubElements = true;
                 break;
             }
         }
     }
     return currentElement;
 }
 
 /*!
   Returns the layout element of type \ref QCPAxisRect at pixel position \a pos. This method ignores
   other layout elements even if they are visually in front of the axis rect (e.g. a \ref
   QCPLegend). If there is no axis rect at that position, returns 0.
 
   Only visible axis rects are used. If \ref QCPLayoutElement::setVisible on the axis rect itself or
   on any of its parent elements is set to false, it will not be considered.
 
   \see layoutElementAt
 */
 QCPAxisRect *QCustomPlot::axisRectAt(const QPointF &pos) const
 {
-    QCPAxisRect *result              = 0;
+    QCPAxisRect *result              = nullptr;
     QCPLayoutElement *currentElement = mPlotLayout;
     bool searchSubElements           = true;
     while (searchSubElements && currentElement)
     {
         searchSubElements = false;
         foreach (QCPLayoutElement *subElement, currentElement->elements(false))
         {
             if (subElement && subElement->realVisibility() && subElement->selectTest(pos, false) >= 0)
             {
                 currentElement    = subElement;
                 searchSubElements = true;
                 if (QCPAxisRect *ar = qobject_cast<QCPAxisRect *>(currentElement))
                     result = ar;
                 break;
             }
         }
     }
     return result;
 }
 
 /*!
   Returns the axes that currently have selected parts, i.e. whose selection state is not \ref
   QCPAxis::spNone.
 
   \see selectedPlottables, selectedLegends, setInteractions, QCPAxis::setSelectedParts,
   QCPAxis::setSelectableParts
 */
 QList<QCPAxis *> QCustomPlot::selectedAxes() const
 {
     QList<QCPAxis *> result, allAxes;
     foreach (QCPAxisRect *rect, axisRects())
         allAxes << rect->axes();
 
     foreach (QCPAxis *axis, allAxes)
     {
         if (axis->selectedParts() != QCPAxis::spNone)
             result.append(axis);
     }
 
     return result;
 }
 
 /*!
   Returns the legends that currently have selected parts, i.e. whose selection state is not \ref
   QCPLegend::spNone.
 
   \see selectedPlottables, selectedAxes, setInteractions, QCPLegend::setSelectedParts,
   QCPLegend::setSelectableParts, QCPLegend::selectedItems
 */
 QList<QCPLegend *> QCustomPlot::selectedLegends() const
 {
     QList<QCPLegend *> result;
 
     QStack<QCPLayoutElement *> elementStack;
     if (mPlotLayout)
         elementStack.push(mPlotLayout);
 
     while (!elementStack.isEmpty())
     {
         foreach (QCPLayoutElement *subElement, elementStack.pop()->elements(false))
         {
             if (subElement)
             {
                 elementStack.push(subElement);
                 if (QCPLegend *leg = qobject_cast<QCPLegend *>(subElement))
                 {
                     if (leg->selectedParts() != QCPLegend::spNone)
                         result.append(leg);
                 }
             }
         }
     }
 
     return result;
 }
 
 /*!
   Deselects all layerables (plottables, items, axes, legends,...) of the QCustomPlot.
 
   Since calling this function is not a user interaction, this does not emit the \ref
   selectionChangedByUser signal. The individual selectionChanged signals are emitted though, if the
   objects were previously selected.
 
   \see setInteractions, selectedPlottables, selectedItems, selectedAxes, selectedLegends
 */
 void QCustomPlot::deselectAll()
 {
     foreach (QCPLayer *layer, mLayers)
     {
         foreach (QCPLayerable *layerable, layer->children())
-            layerable->deselectEvent(0);
+            layerable->deselectEvent(nullptr);
     }
 }
 
 /*!
   Causes a complete replot into the internal paint buffer(s). Finally, the widget surface is
   refreshed with the new buffer contents. This is the method that must be called to make changes to
   the plot, e.g. on the axis ranges or data points of graphs, visible.
 
   The parameter \a refreshPriority can be used to fine-tune the timing of the replot. For example
   if your application calls \ref replot very quickly in succession (e.g. multiple independent
   functions change some aspects of the plot and each wants to make sure the change gets replotted),
   it is advisable to set \a refreshPriority to \ref QCustomPlot::rpQueuedReplot. This way, the
   actual replotting is deferred to the next event loop iteration. Multiple successive calls of \ref
   replot with this priority will only cause a single replot, avoiding redundant replots and
   improving performance.
 
   Under a few circumstances, QCustomPlot causes a replot by itself. Those are resize events of the
   QCustomPlot widget and user interactions (object selection and range dragging/zooming).
 
   Before the replot happens, the signal \ref beforeReplot is emitted. After the replot, \ref
   afterReplot is emitted. It is safe to mutually connect the replot slot with any of those two
   signals on two QCustomPlots to make them replot synchronously, it won't cause an infinite
   recursion.
 
   If a layer is in mode \ref QCPLayer::lmBuffered (\ref QCPLayer::setMode), it is also possible to
   replot only that specific layer via \ref QCPLayer::replot. See the documentation there for
   details.
 */
 void QCustomPlot::replot(QCustomPlot::RefreshPriority refreshPriority)
 {
     if (refreshPriority == QCustomPlot::rpQueuedReplot)
     {
         if (!mReplotQueued)
         {
             mReplotQueued = true;
             QTimer::singleShot(0, this, SLOT(replot()));
         }
         return;
     }
 
     if (mReplotting) // incase signals loop back to replot slot
         return;
     mReplotting   = true;
     mReplotQueued = false;
     emit beforeReplot();
 
     updateLayout();
     // draw all layered objects (grid, axes, plottables, items, legend,...) into their buffers:
     setupPaintBuffers();
     foreach (QCPLayer *layer, mLayers)
         layer->drawToPaintBuffer();
     for (int i = 0; i < mPaintBuffers.size(); ++i)
         mPaintBuffers.at(i)->setInvalidated(false);
 
     if ((refreshPriority == rpRefreshHint && mPlottingHints.testFlag(QCP::phImmediateRefresh)) ||
         refreshPriority == rpImmediateRefresh)
         repaint();
     else
         update();
 
     emit afterReplot();
     mReplotting = false;
 }
 
 /*!
   Rescales the axes such that all plottables (like graphs) in the plot are fully visible.
 
   if \a onlyVisiblePlottables is set to true, only the plottables that have their visibility set to true
   (QCPLayerable::setVisible), will be used to rescale the axes.
 
   \see QCPAbstractPlottable::rescaleAxes, QCPAxis::rescale
 */
 void QCustomPlot::rescaleAxes(bool onlyVisiblePlottables)
 {
     QList<QCPAxis *> allAxes;
     foreach (QCPAxisRect *rect, axisRects())
         allAxes << rect->axes();
 
     foreach (QCPAxis *axis, allAxes)
         axis->rescale(onlyVisiblePlottables);
 }
 
 /*!
   Saves a PDF with the vectorized plot to the file \a fileName. The axis ratio as well as the scale
   of texts and lines will be derived from the specified \a width and \a height. This means, the
   output will look like the normal on-screen output of a QCustomPlot widget with the corresponding
   pixel width and height. If either \a width or \a height is zero, the exported image will have the
   same dimensions as the QCustomPlot widget currently has.
 
   Setting \a exportPen to \ref QCP::epNoCosmetic allows to disable the use of cosmetic pens when
   drawing to the PDF file. Cosmetic pens are pens with numerical width 0, which are always drawn as
   a one pixel wide line, no matter what zoom factor is set in the PDF-Viewer. For more information
   about cosmetic pens, see the QPainter and QPen documentation.
 
   The objects of the plot will appear in the current selection state. If you don't want any
   selected objects to be painted in their selected look, deselect everything with \ref deselectAll
   before calling this function.
 
   Returns true on success.
 
   \warning
   \li If you plan on editing the exported PDF file with a vector graphics editor like Inkscape, it
   is advised to set \a exportPen to \ref QCP::epNoCosmetic to avoid losing those cosmetic lines
   (which might be quite many, because cosmetic pens are the default for e.g. axes and tick marks).
   \li If calling this function inside the constructor of the parent of the QCustomPlot widget
   (i.e. the MainWindow constructor, if QCustomPlot is inside the MainWindow), always provide
   explicit non-zero widths and heights. If you leave \a width or \a height as 0 (default), this
   function uses the current width and height of the QCustomPlot widget. However, in Qt, these
   aren't defined yet inside the constructor, so you would get an image that has strange
   widths/heights.
 
   \a pdfCreator and \a pdfTitle may be used to set the according metadata fields in the resulting
   PDF file.
 
   \note On Android systems, this method does nothing and issues an according qDebug warning
   message. This is also the case if for other reasons the define flag \c QT_NO_PRINTER is set.
 
   \see savePng, saveBmp, saveJpg, saveRastered
 */
 bool QCustomPlot::savePdf(const QString &fileName, int width, int height, QCP::ExportPen exportPen,
                           const QString &pdfCreator, const QString &pdfTitle)
 {
     bool success = false;
 #ifdef QT_NO_PRINTER
     Q_UNUSED(fileName)
     Q_UNUSED(exportPen)
     Q_UNUSED(width)
     Q_UNUSED(height)
     Q_UNUSED(pdfCreator)
     Q_UNUSED(pdfTitle)
     qDebug() << Q_FUNC_INFO << "Qt was built without printer support (QT_NO_PRINTER). PDF not created.";
 #else
     int newWidth, newHeight;
     if (width == 0 || height == 0)
     {
         newWidth = this->width();
         newHeight = this->height();
     }
     else
     {
         newWidth = width;
         newHeight = height;
     }
 
     QPrinter printer(QPrinter::ScreenResolution);
     printer.setOutputFileName(fileName);
     printer.setOutputFormat(QPrinter::PdfFormat);
     printer.setColorMode(QPrinter::Color);
     printer.printEngine()->setProperty(QPrintEngine::PPK_Creator, pdfCreator);
     printer.printEngine()->setProperty(QPrintEngine::PPK_DocumentName, pdfTitle);
     QRect oldViewport = viewport();
     setViewport(QRect(0, 0, newWidth, newHeight));
 #if QT_VERSION < QT_VERSION_CHECK(5, 3, 0)
     printer.setFullPage(true);
     printer.setPaperSize(viewport().size(), QPrinter::DevicePixel);
 #else
     QPageLayout pageLayout;
     pageLayout.setMode(QPageLayout::FullPageMode);
     pageLayout.setOrientation(QPageLayout::Portrait);
     pageLayout.setMargins(QMarginsF(0, 0, 0, 0));
     pageLayout.setPageSize(QPageSize(viewport().size(), QPageSize::Point, QString(), QPageSize::ExactMatch));
     printer.setPageLayout(pageLayout);
 #endif
     QCPPainter printpainter;
     if (printpainter.begin(&printer))
     {
         printpainter.setMode(QCPPainter::pmVectorized);
         printpainter.setMode(QCPPainter::pmNoCaching);
         printpainter.setMode(QCPPainter::pmNonCosmetic, exportPen == QCP::epNoCosmetic);
         printpainter.setWindow(mViewport);
         if (mBackgroundBrush.style() != Qt::NoBrush && mBackgroundBrush.color() != Qt::white &&
             mBackgroundBrush.color() != Qt::transparent &&
             mBackgroundBrush.color().alpha() > 0) // draw pdf background color if not white/transparent
             printpainter.fillRect(viewport(), mBackgroundBrush);
         draw(&printpainter);
         printpainter.end();
         success = true;
     }
     setViewport(oldViewport);
 #endif // QT_NO_PRINTER
     return success;
 }
 
 /*!
   Saves a PNG image file to \a fileName on disc. The output plot will have the dimensions \a width
   and \a height in pixels, multiplied by \a scale. If either \a width or \a height is zero, the
   current width and height of the QCustomPlot widget is used instead. Line widths and texts etc.
   are not scaled up when larger widths/heights are used. If you want that effect, use the \a scale
   parameter.
 
   For example, if you set both \a width and \a height to 100 and \a scale to 2, you will end up with an
   image file of size 200*200 in which all graphical elements are scaled up by factor 2 (line widths,
   texts, etc.). This scaling is not done by stretching a 100*100 image, the result will have full
   200*200 pixel resolution.
 
   If you use a high scaling factor, it is recommended to enable antialiasing for all elements by
   temporarily setting \ref QCustomPlot::setAntialiasedElements to \ref QCP::aeAll as this allows
   QCustomPlot to place objects with sub-pixel accuracy.
 
   image compression can be controlled with the \a quality parameter which must be between 0 and 100
   or -1 to use the default setting.
 
   The \a resolution will be written to the image file header and has no direct consequence for the
   quality or the pixel size. However, if opening the image with a tool which respects the metadata,
   it will be able to scale the image to match either a given size in real units of length (inch,
   centimeters, etc.), or the target display DPI. You can specify in which units \a resolution is
   given, by setting \a resolutionUnit. The \a resolution is converted to the format's expected
   resolution unit internally.
 
   Returns true on success. If this function fails, most likely the PNG format isn't supported by
   the system, see Qt docs about QImageWriter::supportedImageFormats().
 
   The objects of the plot will appear in the current selection state. If you don't want any selected
   objects to be painted in their selected look, deselect everything with \ref deselectAll before calling
   this function.
 
   If you want the PNG to have a transparent background, call \ref setBackground(const QBrush &brush)
   with no brush (Qt::NoBrush) or a transparent color (Qt::transparent), before saving.
 
   \warning If calling this function inside the constructor of the parent of the QCustomPlot widget
   (i.e. the MainWindow constructor, if QCustomPlot is inside the MainWindow), always provide
   explicit non-zero widths and heights. If you leave \a width or \a height as 0 (default), this
   function uses the current width and height of the QCustomPlot widget. However, in Qt, these
   aren't defined yet inside the constructor, so you would get an image that has strange
   widths/heights.
 
   \see savePdf, saveBmp, saveJpg, saveRastered
 */
 bool QCustomPlot::savePng(const QString &fileName, int width, int height, double scale, int quality, int resolution,
                           QCP::ResolutionUnit resolutionUnit)
 {
     return saveRastered(fileName, width, height, scale, "PNG", quality, resolution, resolutionUnit);
 }
 
 /*!
   Saves a JPEG image file to \a fileName on disc. The output plot will have the dimensions \a width
   and \a height in pixels, multiplied by \a scale. If either \a width or \a height is zero, the
   current width and height of the QCustomPlot widget is used instead. Line widths and texts etc.
   are not scaled up when larger widths/heights are used. If you want that effect, use the \a scale
   parameter.
 
   For example, if you set both \a width and \a height to 100 and \a scale to 2, you will end up with an
   image file of size 200*200 in which all graphical elements are scaled up by factor 2 (line widths,
   texts, etc.). This scaling is not done by stretching a 100*100 image, the result will have full
   200*200 pixel resolution.
 
   If you use a high scaling factor, it is recommended to enable antialiasing for all elements by
   temporarily setting \ref QCustomPlot::setAntialiasedElements to \ref QCP::aeAll as this allows
   QCustomPlot to place objects with sub-pixel accuracy.
 
   image compression can be controlled with the \a quality parameter which must be between 0 and 100
   or -1 to use the default setting.
 
   The \a resolution will be written to the image file header and has no direct consequence for the
   quality or the pixel size. However, if opening the image with a tool which respects the metadata,
   it will be able to scale the image to match either a given size in real units of length (inch,
   centimeters, etc.), or the target display DPI. You can specify in which units \a resolution is
   given, by setting \a resolutionUnit. The \a resolution is converted to the format's expected
   resolution unit internally.
 
   Returns true on success. If this function fails, most likely the JPEG format isn't supported by
   the system, see Qt docs about QImageWriter::supportedImageFormats().
 
   The objects of the plot will appear in the current selection state. If you don't want any selected
   objects to be painted in their selected look, deselect everything with \ref deselectAll before calling
   this function.
 
   \warning If calling this function inside the constructor of the parent of the QCustomPlot widget
   (i.e. the MainWindow constructor, if QCustomPlot is inside the MainWindow), always provide
   explicit non-zero widths and heights. If you leave \a width or \a height as 0 (default), this
   function uses the current width and height of the QCustomPlot widget. However, in Qt, these
   aren't defined yet inside the constructor, so you would get an image that has strange
   widths/heights.
 
   \see savePdf, savePng, saveBmp, saveRastered
 */
 bool QCustomPlot::saveJpg(const QString &fileName, int width, int height, double scale, int quality, int resolution,
                           QCP::ResolutionUnit resolutionUnit)
 {
     return saveRastered(fileName, width, height, scale, "JPG", quality, resolution, resolutionUnit);
 }
 
 /*!
   Saves a BMP image file to \a fileName on disc. The output plot will have the dimensions \a width
   and \a height in pixels, multiplied by \a scale. If either \a width or \a height is zero, the
   current width and height of the QCustomPlot widget is used instead. Line widths and texts etc.
   are not scaled up when larger widths/heights are used. If you want that effect, use the \a scale
   parameter.
 
   For example, if you set both \a width and \a height to 100 and \a scale to 2, you will end up with an
   image file of size 200*200 in which all graphical elements are scaled up by factor 2 (line widths,
   texts, etc.). This scaling is not done by stretching a 100*100 image, the result will have full
   200*200 pixel resolution.
 
   If you use a high scaling factor, it is recommended to enable antialiasing for all elements by
   temporarily setting \ref QCustomPlot::setAntialiasedElements to \ref QCP::aeAll as this allows
   QCustomPlot to place objects with sub-pixel accuracy.
 
   The \a resolution will be written to the image file header and has no direct consequence for the
   quality or the pixel size. However, if opening the image with a tool which respects the metadata,
   it will be able to scale the image to match either a given size in real units of length (inch,
   centimeters, etc.), or the target display DPI. You can specify in which units \a resolution is
   given, by setting \a resolutionUnit. The \a resolution is converted to the format's expected
   resolution unit internally.
 
   Returns true on success. If this function fails, most likely the BMP format isn't supported by
   the system, see Qt docs about QImageWriter::supportedImageFormats().
 
   The objects of the plot will appear in the current selection state. If you don't want any selected
   objects to be painted in their selected look, deselect everything with \ref deselectAll before calling
   this function.
 
   \warning If calling this function inside the constructor of the parent of the QCustomPlot widget
   (i.e. the MainWindow constructor, if QCustomPlot is inside the MainWindow), always provide
   explicit non-zero widths and heights. If you leave \a width or \a height as 0 (default), this
   function uses the current width and height of the QCustomPlot widget. However, in Qt, these
   aren't defined yet inside the constructor, so you would get an image that has strange
   widths/heights.
 
   \see savePdf, savePng, saveJpg, saveRastered
 */
 bool QCustomPlot::saveBmp(const QString &fileName, int width, int height, double scale, int resolution,
                           QCP::ResolutionUnit resolutionUnit)
 {
     return saveRastered(fileName, width, height, scale, "BMP", -1, resolution, resolutionUnit);
 }
 
 /*! \internal
 
   Returns a minimum size hint that corresponds to the minimum size of the top level layout
   (\ref plotLayout). To prevent QCustomPlot from being collapsed to size/width zero, set a minimum
   size (setMinimumSize) either on the whole QCustomPlot or on any layout elements inside the plot.
   This is especially important, when placed in a QLayout where other components try to take in as
   much space as possible (e.g. QMdiArea).
 */
 QSize QCustomPlot::minimumSizeHint() const
 {
     return mPlotLayout->minimumSizeHint();
 }
 
 /*! \internal
 
   Returns a size hint that is the same as \ref minimumSizeHint.
 
 */
 QSize QCustomPlot::sizeHint() const
 {
     return mPlotLayout->minimumSizeHint();
 }
 
 /*! \internal
 
   Event handler for when the QCustomPlot widget needs repainting. This does not cause a \ref replot, but
   draws the internal buffer on the widget surface.
 */
 void QCustomPlot::paintEvent(QPaintEvent *event)
 {
     Q_UNUSED(event);
     QCPPainter painter(this);
     if (painter.isActive())
     {
         painter.setRenderHint(
             QPainter::HighQualityAntialiasing); // to make Antialiasing look good if using the OpenGL graphicssystem
         if (mBackgroundBrush.style() != Qt::NoBrush)
             painter.fillRect(mViewport, mBackgroundBrush);
         drawBackground(&painter);
         for (int bufferIndex = 0; bufferIndex < mPaintBuffers.size(); ++bufferIndex)
             mPaintBuffers.at(bufferIndex)->draw(&painter);
     }
 }
 
 /*! \internal
 
   Event handler for a resize of the QCustomPlot widget. The viewport (which becomes the outer rect
   of mPlotLayout) is resized appropriately. Finally a \ref replot is performed.
 */
 void QCustomPlot::resizeEvent(QResizeEvent *event)
 {
     Q_UNUSED(event)
     // resize and repaint the buffer:
     setViewport(rect());
     replot(
         rpQueuedRefresh); // queued refresh is important here, to prevent painting issues in some contexts (e.g. MDI subwindow)
 }
 
 bool QCustomPlot::event(QEvent *event)
 {
     switch (event->type())
     {
         case QEvent::Gesture:
         {
             QGestureEvent *gestureEve = static_cast<QGestureEvent *>(event);
             if (QGesture *pinch = gestureEve->gesture(Qt::PinchGesture))
             {
                 QPinchGesture *pinchEve = static_cast<QPinchGesture *>(pinch);
                 qreal scaleFactor       = pinchEve->totalScaleFactor();
                 if (scaleFactor > 1.0)
                 {
                     scaleFactor *= 5;
                 }
                 else
                 {
                     scaleFactor *= -15;
                 }
                 QWheelEvent *wheelEve = new QWheelEvent(this->mapFromGlobal(QCursor::pos()), scaleFactor, Qt::NoButton,
                                                         Qt::NoModifier, Qt::Vertical);
                 this->wheelEvent(wheelEve);
             }
             return true;
         }
         default:
         {
             break;
         }
     }
 
     return QWidget::event(event);
 }
 
 /*! \internal
 
  Event handler for when a double click occurs. Emits the \ref mouseDoubleClick signal, then
  determines the layerable under the cursor and forwards the event to it. Finally, emits the
  specialized signals when certain objecs are clicked (e.g. \ref plottableDoubleClick, \ref
  axisDoubleClick, etc.).
 
  \see mousePressEvent, mouseReleaseEvent
 */
 void QCustomPlot::mouseDoubleClickEvent(QMouseEvent *event)
 {
     emit mouseDoubleClick(event);
     mMouseHasMoved = false;
     mMousePressPos = event->pos();
 
     // determine layerable under the cursor (this event is called instead of the second press event in a double-click):
     QList<QVariant> details;
     QList<QCPLayerable *> candidates = layerableListAt(mMousePressPos, false, &details);
     for (int i = 0; i < candidates.size(); ++i)
     {
         event
             ->accept(); // default impl of QCPLayerable's mouse events ignore the event, in that case propagate to next candidate in list
         candidates.at(i)->mouseDoubleClickEvent(event, details.at(i));
         if (event->isAccepted())
         {
             mMouseEventLayerable        = candidates.at(i);
             mMouseEventLayerableDetails = details.at(i);
             break;
         }
     }
 
     // emit specialized object double click signals:
     if (!candidates.isEmpty())
     {
         if (QCPAbstractPlottable *ap = qobject_cast<QCPAbstractPlottable *>(candidates.first()))
         {
             int dataIndex = 0;
             if (!details.first().value<QCPDataSelection>().isEmpty())
                 dataIndex = details.first().value<QCPDataSelection>().dataRange().begin();
             emit plottableDoubleClick(ap, dataIndex, event);
         }
         else if (QCPAxis *ax = qobject_cast<QCPAxis *>(candidates.first()))
             emit axisDoubleClick(ax, details.first().value<QCPAxis::SelectablePart>(), event);
         else if (QCPAbstractItem *ai = qobject_cast<QCPAbstractItem *>(candidates.first()))
             emit itemDoubleClick(ai, event);
         else if (QCPLegend *lg = qobject_cast<QCPLegend *>(candidates.first()))
-            emit legendDoubleClick(lg, 0, event);
+            emit legendDoubleClick(lg, nullptr, event);
         else if (QCPAbstractLegendItem *li = qobject_cast<QCPAbstractLegendItem *>(candidates.first()))
             emit legendDoubleClick(li->parentLegend(), li, event);
     }
 
     event
         ->accept(); // in case QCPLayerable reimplementation manipulates event accepted state. In QWidget event system, QCustomPlot wants to accept the event.
 }
 
 /*! \internal
 
   Event handler for when a mouse button is pressed. Emits the mousePress signal.
 
   If the current \ref setSelectionRectMode is not \ref QCP::srmNone, passes the event to the
   selection rect. Otherwise determines the layerable under the cursor and forwards the event to it.
 
   \see mouseMoveEvent, mouseReleaseEvent
 */
 void QCustomPlot::mousePressEvent(QMouseEvent *event)
 {
     emit mousePress(event);
     // save some state to tell in releaseEvent whether it was a click:
     mMouseHasMoved = false;
     mMousePressPos = event->pos();
 
     if (mSelectionRect && mSelectionRectMode != QCP::srmNone)
     {
         if (mSelectionRectMode != QCP::srmZoom ||
             qobject_cast<QCPAxisRect *>(
                 axisRectAt(mMousePressPos))) // in zoom mode only activate selection rect if on an axis rect
             mSelectionRect->startSelection(event);
     }
     else
     {
         // no selection rect interaction, so forward event to layerable under the cursor:
         QList<QVariant> details;
         QList<QCPLayerable *> candidates = layerableListAt(mMousePressPos, false, &details);
         for (int i = 0; i < candidates.size(); ++i)
         {
             event
                 ->accept(); // default impl of QCPLayerable's mouse events ignore the event, in that case propagate to next candidate in list
             candidates.at(i)->mousePressEvent(event, details.at(i));
             if (event->isAccepted())
             {
                 mMouseEventLayerable        = candidates.at(i);
                 mMouseEventLayerableDetails = details.at(i);
                 break;
             }
         }
     }
 
     event
         ->accept(); // in case QCPLayerable reimplementation manipulates event accepted state. In QWidget event system, QCustomPlot wants to accept the event.
 }
 
 /*! \internal
 
   Event handler for when the cursor is moved. Emits the \ref mouseMove signal.
 
   If the selection rect (\ref setSelectionRect) is currently active, the event is forwarded to it
   in order to update the rect geometry.
 
   Otherwise, if a layout element has mouse capture focus (a mousePressEvent happened on top of the
   layout element before), the mouseMoveEvent is forwarded to that element.
 
   \see mousePressEvent, mouseReleaseEvent
 */
 void QCustomPlot::mouseMoveEvent(QMouseEvent *event)
 {
     emit mouseMove(event);
 
     if (!mMouseHasMoved && (mMousePressPos - event->pos()).manhattanLength() > 3)
         mMouseHasMoved = true; // moved too far from mouse press position, don't handle as click on mouse release
 
     if (mSelectionRect && mSelectionRect->isActive())
         mSelectionRect->moveSelection(event);
     else if (mMouseEventLayerable) // call event of affected layerable:
         mMouseEventLayerable->mouseMoveEvent(event, mMousePressPos);
 
     event
         ->accept(); // in case QCPLayerable reimplementation manipulates event accepted state. In QWidget event system, QCustomPlot wants to accept the event.
 }
 
 /*! \internal
 
   Event handler for when a mouse button is released. Emits the \ref mouseRelease signal.
 
   If the mouse was moved less than a certain threshold in any direction since the \ref
   mousePressEvent, it is considered a click which causes the selection mechanism (if activated via
   \ref setInteractions) to possibly change selection states accordingly. Further, specialized mouse
   click signals are emitted (e.g. \ref plottableClick, \ref axisClick, etc.)
 
   If a layerable is the mouse capturer (a \ref mousePressEvent happened on top of the layerable
   before), the \ref mouseReleaseEvent is forwarded to that element.
 
   \see mousePressEvent, mouseMoveEvent
 */
 void QCustomPlot::mouseReleaseEvent(QMouseEvent *event)
 {
     emit mouseRelease(event);
 
     if (!mMouseHasMoved) // mouse hasn't moved (much) between press and release, so handle as click
     {
         if (mSelectionRect &&
             mSelectionRect
                 ->isActive()) // a simple click shouldn't successfully finish a selection rect, so cancel it here
             mSelectionRect->cancel();
         if (event->button() == Qt::LeftButton)
             processPointSelection(event);
 
         // emit specialized click signals of QCustomPlot instance:
         if (QCPAbstractPlottable *ap = qobject_cast<QCPAbstractPlottable *>(mMouseEventLayerable))
         {
             int dataIndex = 0;
             if (!mMouseEventLayerableDetails.value<QCPDataSelection>().isEmpty())
                 dataIndex = mMouseEventLayerableDetails.value<QCPDataSelection>().dataRange().begin();
             emit plottableClick(ap, dataIndex, event);
         }
         else if (QCPAxis *ax = qobject_cast<QCPAxis *>(mMouseEventLayerable))
             emit axisClick(ax, mMouseEventLayerableDetails.value<QCPAxis::SelectablePart>(), event);
         else if (QCPAbstractItem *ai = qobject_cast<QCPAbstractItem *>(mMouseEventLayerable))
             emit itemClick(ai, event);
         else if (QCPLegend *lg = qobject_cast<QCPLegend *>(mMouseEventLayerable))
-            emit legendClick(lg, 0, event);
+            emit legendClick(lg, nullptr, event);
         else if (QCPAbstractLegendItem *li = qobject_cast<QCPAbstractLegendItem *>(mMouseEventLayerable))
             emit legendClick(li->parentLegend(), li, event);
     }
 
     if (mSelectionRect &&
         mSelectionRect->isActive()) // Note: if a click was detected above, the selection rect is canceled there
     {
         // finish selection rect, the appropriate action will be taken via signal-slot connection:
         mSelectionRect->endSelection(event);
     }
     else
     {
         // call event of affected layerable:
         if (mMouseEventLayerable)
         {
             mMouseEventLayerable->mouseReleaseEvent(event, mMousePressPos);
-            mMouseEventLayerable = 0;
+            mMouseEventLayerable = nullptr;
         }
     }
 
     if (noAntialiasingOnDrag())
         replot(rpQueuedReplot);
 
     event
         ->accept(); // in case QCPLayerable reimplementation manipulates event accepted state. In QWidget event system, QCustomPlot wants to accept the event.
 }
 
 /*! \internal
 
   Event handler for mouse wheel events. First, the \ref mouseWheel signal is emitted. Then
   determines the affected layerable and forwards the event to it.
 */
 void QCustomPlot::wheelEvent(QWheelEvent *event)
 {
     emit mouseWheel(event);
     // forward event to layerable under cursor:
     QList<QCPLayerable *> candidates = layerableListAt(event->pos(), false);
     for (int i = 0; i < candidates.size(); ++i)
     {
         event
             ->accept(); // default impl of QCPLayerable's mouse events ignore the event, in that case propagate to next candidate in list
         candidates.at(i)->wheelEvent(event);
         if (event->isAccepted())
             break;
     }
     event
         ->accept(); // in case QCPLayerable reimplementation manipulates event accepted state. In QWidget event system, QCustomPlot wants to accept the event.
 }
 
 /*! \internal
 
   This function draws the entire plot, including background pixmap, with the specified \a painter.
   It does not make use of the paint buffers like \ref replot, so this is the function typically
   used by saving/exporting methods such as \ref savePdf or \ref toPainter.
 
   Note that it does not fill the background with the background brush (as the user may specify with
   \ref setBackground(const QBrush &brush)), this is up to the respective functions calling this
   method.
 */
 void QCustomPlot::draw(QCPPainter *painter)
 {
     updateLayout();
 
     // draw viewport background pixmap:
     drawBackground(painter);
 
     // draw all layered objects (grid, axes, plottables, items, legend,...):
     foreach (QCPLayer *layer, mLayers)
         layer->draw(painter);
 
     /* Debug code to draw all layout element rects
     foreach (QCPLayoutElement* el, findChildren<QCPLayoutElement*>())
     {
       painter->setBrush(Qt::NoBrush);
       painter->setPen(QPen(QColor(0, 0, 0, 100), 0, Qt::DashLine));
       painter->drawRect(el->rect());
       painter->setPen(QPen(QColor(255, 0, 0, 100), 0, Qt::DashLine));
       painter->drawRect(el->outerRect());
     }
     */
 }
 
 /*! \internal
 
   Performs the layout update steps defined by \ref QCPLayoutElement::UpdatePhase, by calling \ref
   QCPLayoutElement::update on the main plot layout.
 
   Here, the layout elements calculate their positions and margins, and prepare for the following
   draw call.
 */
 void QCustomPlot::updateLayout()
 {
     // run through layout phases:
     mPlotLayout->update(QCPLayoutElement::upPreparation);
     mPlotLayout->update(QCPLayoutElement::upMargins);
     mPlotLayout->update(QCPLayoutElement::upLayout);
 }
 
 /*! \internal
 
   Draws the viewport background pixmap of the plot.
 
   If a pixmap was provided via \ref setBackground, this function buffers the scaled version
   depending on \ref setBackgroundScaled and \ref setBackgroundScaledMode and then draws it inside
   the viewport with the provided \a painter. The scaled version is buffered in
   mScaledBackgroundPixmap to prevent expensive rescaling at every redraw. It is only updated, when
   the axis rect has changed in a way that requires a rescale of the background pixmap (this is
   dependent on the \ref setBackgroundScaledMode), or when a differend axis background pixmap was
   set.
 
   Note that this function does not draw a fill with the background brush
   (\ref setBackground(const QBrush &brush)) beneath the pixmap.
 
   \see setBackground, setBackgroundScaled, setBackgroundScaledMode
 */
 void QCustomPlot::drawBackground(QCPPainter *painter)
 {
     // Note: background color is handled in individual replot/save functions
 
     // draw background pixmap (on top of fill, if brush specified):
     if (!mBackgroundPixmap.isNull())
     {
         if (mBackgroundScaled)
         {
             // check whether mScaledBackground needs to be updated:
             QSize scaledSize(mBackgroundPixmap.size());
             scaledSize.scale(mViewport.size(), mBackgroundScaledMode);
             if (mScaledBackgroundPixmap.size() != scaledSize)
                 mScaledBackgroundPixmap =
                     mBackgroundPixmap.scaled(mViewport.size(), mBackgroundScaledMode, Qt::SmoothTransformation);
             painter->drawPixmap(mViewport.topLeft(), mScaledBackgroundPixmap,
                                 QRect(0, 0, mViewport.width(), mViewport.height()) & mScaledBackgroundPixmap.rect());
         }
         else
         {
             painter->drawPixmap(mViewport.topLeft(), mBackgroundPixmap,
                                 QRect(0, 0, mViewport.width(), mViewport.height()));
         }
     }
 }
 
 /*! \internal
 
   Goes through the layers and makes sure this QCustomPlot instance holds the correct number of
   paint buffers and that they have the correct configuration (size, pixel ratio, etc.).
   Allocations, reallocations and deletions of paint buffers are performed as necessary. It also
   associates the paint buffers with the layers, so they draw themselves into the right buffer when
   \ref QCPLayer::drawToPaintBuffer is called. This means it associates adjacent \ref
   QCPLayer::lmLogical layers to a mutual paint buffer and creates dedicated paint buffers for
   layers in \ref QCPLayer::lmBuffered mode.
 
   This method uses \ref createPaintBuffer to create new paint buffers.
 
   After this method, the paint buffers are empty (filled with \c Qt::transparent) and invalidated
   (so an attempt to replot only a single buffered layer causes a full replot).
 
   This method is called in every \ref replot call, prior to actually drawing the layers (into their
   associated paint buffer). If the paint buffers don't need changing/reallocating, this method
   basically leaves them alone and thus finishes very fast.
 */
 void QCustomPlot::setupPaintBuffers()
 {
     int bufferIndex = 0;
     if (mPaintBuffers.isEmpty())
         mPaintBuffers.append(QSharedPointer<QCPAbstractPaintBuffer>(createPaintBuffer()));
 
     for (int layerIndex = 0; layerIndex < mLayers.size(); ++layerIndex)
     {
         QCPLayer *layer = mLayers.at(layerIndex);
         if (layer->mode() == QCPLayer::lmLogical)
         {
             layer->mPaintBuffer = mPaintBuffers.at(bufferIndex).toWeakRef();
         }
         else if (layer->mode() == QCPLayer::lmBuffered)
         {
             ++bufferIndex;
             if (bufferIndex >= mPaintBuffers.size())
                 mPaintBuffers.append(QSharedPointer<QCPAbstractPaintBuffer>(createPaintBuffer()));
             layer->mPaintBuffer = mPaintBuffers.at(bufferIndex).toWeakRef();
             if (layerIndex < mLayers.size() - 1 &&
                 mLayers.at(layerIndex + 1)->mode() ==
                     QCPLayer::
                         lmLogical) // not last layer, and next one is logical, so prepare another buffer for next layerables
             {
                 ++bufferIndex;
                 if (bufferIndex >= mPaintBuffers.size())
                     mPaintBuffers.append(QSharedPointer<QCPAbstractPaintBuffer>(createPaintBuffer()));
             }
         }
     }
     // remove unneeded buffers:
     while (mPaintBuffers.size() - 1 > bufferIndex)
         mPaintBuffers.removeLast();
     // resize buffers to viewport size and clear contents:
     for (int i = 0; i < mPaintBuffers.size(); ++i)
     {
         mPaintBuffers.at(i)->setSize(viewport().size()); // won't do anything if already correct size
         mPaintBuffers.at(i)->clear(Qt::transparent);
         mPaintBuffers.at(i)->setInvalidated();
     }
 }
 
 /*! \internal
 
   This method is used by \ref setupPaintBuffers when it needs to create new paint buffers.
 
   Depending on the current setting of \ref setOpenGl, and the current Qt version, different
   backends (subclasses of \ref QCPAbstractPaintBuffer) are created, initialized with the proper
   size and device pixel ratio, and returned.
 */
 QCPAbstractPaintBuffer *QCustomPlot::createPaintBuffer()
 {
     if (mOpenGl)
     {
 #if defined(QCP_OPENGL_FBO)
         return new QCPPaintBufferGlFbo(viewport().size(), mBufferDevicePixelRatio, mGlContext, mGlPaintDevice);
 #elif defined(QCP_OPENGL_PBUFFER)
         return new QCPPaintBufferGlPbuffer(viewport().size(), mBufferDevicePixelRatio, mOpenGlMultisamples);
 #else
         qDebug() << Q_FUNC_INFO
                  << "OpenGL enabled even though no support for it compiled in, this shouldn't have happened. Falling "
                     "back to pixmap paint buffer.";
         return new QCPPaintBufferPixmap(viewport().size(), mBufferDevicePixelRatio);
 #endif
     }
     else
         return new QCPPaintBufferPixmap(viewport().size(), mBufferDevicePixelRatio);
 }
 
 /*!
   This method returns whether any of the paint buffers held by this QCustomPlot instance are
   invalidated.
 
   If any buffer is invalidated, a partial replot (\ref QCPLayer::replot) is not allowed and always
   causes a full replot (\ref QCustomPlot::replot) of all layers. This is the case when for example
   the layer order has changed, new layers were added, layers were removed, or layer modes were
   changed (\ref QCPLayer::setMode).
 
   \see QCPAbstractPaintBuffer::setInvalidated
 */
 bool QCustomPlot::hasInvalidatedPaintBuffers()
 {
     for (int i = 0; i < mPaintBuffers.size(); ++i)
     {
         if (mPaintBuffers.at(i)->invalidated())
             return true;
     }
     return false;
 }
 
 /*! \internal
 
   When \ref setOpenGl is set to true, this method is used to initialize OpenGL (create a context,
   surface, paint device).
 
   Returns true on success.
 
   If this method is successful, all paint buffers should be deleted and then reallocated by calling
   \ref setupPaintBuffers, so the OpenGL-based paint buffer subclasses (\ref
   QCPPaintBufferGlPbuffer, \ref QCPPaintBufferGlFbo) are used for subsequent replots.
 
   \see freeOpenGl
 */
 bool QCustomPlot::setupOpenGl()
 {
 #ifdef QCP_OPENGL_FBO
     freeOpenGl();
     QSurfaceFormat proposedSurfaceFormat;
     proposedSurfaceFormat.setSamples(mOpenGlMultisamples);
 #ifdef QCP_OPENGL_OFFSCREENSURFACE
     QOffscreenSurface *surface = new QOffscreenSurface;
 #else
     QWindow *surface = new QWindow;
     surface->setSurfaceType(QSurface::OpenGLSurface);
 #endif
     surface->setFormat(proposedSurfaceFormat);
     surface->create();
     mGlSurface = QSharedPointer<QSurface>(surface);
     mGlContext = QSharedPointer<QOpenGLContext>(new QOpenGLContext);
     mGlContext->setFormat(mGlSurface->format());
     if (!mGlContext->create())
     {
         qDebug() << Q_FUNC_INFO << "Failed to create OpenGL context";
         mGlContext.clear();
         mGlSurface.clear();
         return false;
     }
     if (!mGlContext->makeCurrent(mGlSurface.data())) // context needs to be current to create paint device
     {
         qDebug() << Q_FUNC_INFO << "Failed to make opengl context current";
         mGlContext.clear();
         mGlSurface.clear();
         return false;
     }
     if (!QOpenGLFramebufferObject::hasOpenGLFramebufferObjects())
     {
         qDebug() << Q_FUNC_INFO << "OpenGL of this system doesn't support frame buffer objects";
         mGlContext.clear();
         mGlSurface.clear();
         return false;
     }
     mGlPaintDevice = QSharedPointer<QOpenGLPaintDevice>(new QOpenGLPaintDevice);
     return true;
 #elif defined(QCP_OPENGL_PBUFFER)
     return QGLFormat::hasOpenGL();
 #else
     return false;
 #endif
 }
 
 /*! \internal
 
   When \ref setOpenGl is set to false, this method is used to deinitialize OpenGL (releases the
   context and frees resources).
 
   After OpenGL is disabled, all paint buffers should be deleted and then reallocated by calling
   \ref setupPaintBuffers, so the standard software rendering paint buffer subclass (\ref
   QCPPaintBufferPixmap) is used for subsequent replots.
 
   \see setupOpenGl
 */
 void QCustomPlot::freeOpenGl()
 {
 #ifdef QCP_OPENGL_FBO
     mGlPaintDevice.clear();
     mGlContext.clear();
     mGlSurface.clear();
 #endif
 }
 
 /*! \internal
 
   This method is used by \ref QCPAxisRect::removeAxis to report removed axes to the QCustomPlot
   so it may clear its QCustomPlot::xAxis, yAxis, xAxis2 and yAxis2 members accordingly.
 */
 void QCustomPlot::axisRemoved(QCPAxis *axis)
 {
     if (xAxis == axis)
-        xAxis = 0;
+        xAxis = nullptr;
     if (xAxis2 == axis)
-        xAxis2 = 0;
+        xAxis2 = nullptr;
     if (yAxis == axis)
-        yAxis = 0;
+        yAxis = nullptr;
     if (yAxis2 == axis)
-        yAxis2 = 0;
+        yAxis2 = nullptr;
 
     // Note: No need to take care of range drag axes and range zoom axes, because they are stored in smart pointers
 }
 
 /*! \internal
 
   This method is used by the QCPLegend destructor to report legend removal to the QCustomPlot so
   it may clear its QCustomPlot::legend member accordingly.
 */
 void QCustomPlot::legendRemoved(QCPLegend *legend)
 {
     if (this->legend == legend)
-        this->legend = 0;
+        this->legend = nullptr;
 }
 
 /*! \internal
 
   This slot is connected to the selection rect's \ref QCPSelectionRect::accepted signal when \ref
   setSelectionRectMode is set to \ref QCP::srmSelect.
 
   First, it determines which axis rect was the origin of the selection rect judging by the starting
   point of the selection. Then it goes through the plottables (\ref QCPAbstractPlottable1D to be
   precise) associated with that axis rect and finds the data points that are in \a rect. It does
   this by querying their \ref QCPAbstractPlottable1D::selectTestRect method.
 
   Then, the actual selection is done by calling the plottables' \ref
   QCPAbstractPlottable::selectEvent, placing the found selected data points in the \a details
   parameter as <tt>QVariant(\ref QCPDataSelection)</tt>. All plottables that weren't touched by \a
   rect receive a \ref QCPAbstractPlottable::deselectEvent.
 
   \see processRectZoom
 */
 void QCustomPlot::processRectSelection(QRect rect, QMouseEvent *event)
 {
     bool selectionStateChanged = false;
 
     if (mInteractions.testFlag(QCP::iSelectPlottables))
     {
         QMap<int, QPair<QCPAbstractPlottable *, QCPDataSelection>>
             potentialSelections; // map key is number of selected data points, so we have selections sorted by size
         QRectF rectF(rect.normalized());
         if (QCPAxisRect *affectedAxisRect = axisRectAt(rectF.topLeft()))
         {
             // determine plottables that were hit by the rect and thus are candidates for selection:
             foreach (QCPAbstractPlottable *plottable, affectedAxisRect->plottables())
             {
                 if (QCPPlottableInterface1D *plottableInterface = plottable->interface1D())
                 {
                     QCPDataSelection dataSel = plottableInterface->selectTestRect(rectF, true);
                     if (!dataSel.isEmpty())
                         potentialSelections.insertMulti(
                             dataSel.dataPointCount(),
                             QPair<QCPAbstractPlottable *, QCPDataSelection>(plottable, dataSel));
                 }
             }
 
             if (!mInteractions.testFlag(QCP::iMultiSelect))
             {
                 // only leave plottable with most selected points in map, since we will only select a single plottable:
                 if (!potentialSelections.isEmpty())
                 {
                     QMap<int, QPair<QCPAbstractPlottable *, QCPDataSelection>>::iterator it =
                         potentialSelections.begin();
                     while (it != potentialSelections.end() - 1) // erase all except last element
                         it = potentialSelections.erase(it);
                 }
             }
 
             bool additive = event->modifiers().testFlag(mMultiSelectModifier);
             // deselect all other layerables if not additive selection:
             if (!additive)
             {
                 // emit deselection except to those plottables who will be selected afterwards:
                 foreach (QCPLayer *layer, mLayers)
                 {
                     foreach (QCPLayerable *layerable, layer->children())
                     {
                         if ((potentialSelections.isEmpty() || potentialSelections.constBegin()->first != layerable) &&
                             mInteractions.testFlag(layerable->selectionCategory()))
                         {
                             bool selChanged = false;
                             layerable->deselectEvent(&selChanged);
                             selectionStateChanged |= selChanged;
                         }
                     }
                 }
             }
 
             // go through selections in reverse (largest selection first) and emit select events:
             QMap<int, QPair<QCPAbstractPlottable *, QCPDataSelection>>::const_iterator it =
                 potentialSelections.constEnd();
             while (it != potentialSelections.constBegin())
             {
                 --it;
                 if (mInteractions.testFlag(it.value().first->selectionCategory()))
                 {
                     bool selChanged = false;
                     it.value().first->selectEvent(event, additive, QVariant::fromValue(it.value().second), &selChanged);
                     selectionStateChanged |= selChanged;
                 }
             }
         }
     }
 
     if (selectionStateChanged)
     {
         emit selectionChangedByUser();
         replot(rpQueuedReplot);
     }
     else if (mSelectionRect)
         mSelectionRect->layer()->replot();
 }
 
 /*! \internal
 
   This slot is connected to the selection rect's \ref QCPSelectionRect::accepted signal when \ref
   setSelectionRectMode is set to \ref QCP::srmZoom.
 
   It determines which axis rect was the origin of the selection rect judging by the starting point
   of the selection, and then zooms the axes defined via \ref QCPAxisRect::setRangeZoomAxes to the
   provided \a rect (see \ref QCPAxisRect::zoom).
 
   \see processRectSelection
 */
 void QCustomPlot::processRectZoom(QRect rect, QMouseEvent *event)
 {
     Q_UNUSED(event)
     if (QCPAxisRect *axisRect = axisRectAt(rect.topLeft()))
     {
         QList<QCPAxis *> affectedAxes = QList<QCPAxis *>() << axisRect->rangeZoomAxes(Qt::Horizontal)
                                                            << axisRect->rangeZoomAxes(Qt::Vertical);
-        affectedAxes.removeAll(static_cast<QCPAxis *>(0));
+        affectedAxes.removeAll(static_cast<QCPAxis *>(nullptr));
         axisRect->zoom(QRectF(rect), affectedAxes);
     }
     replot(rpQueuedReplot); // always replot to make selection rect disappear
 }
 
 /*! \internal
 
   This method is called when a simple left mouse click was detected on the QCustomPlot surface.
 
   It first determines the layerable that was hit by the click, and then calls its \ref
   QCPLayerable::selectEvent. All other layerables receive a QCPLayerable::deselectEvent (unless the
   multi-select modifier was pressed, see \ref setMultiSelectModifier).
 
   In this method the hit layerable is determined a second time using \ref layerableAt (after the
   one in \ref mousePressEvent), because we want \a onlySelectable set to true this time. This
   implies that the mouse event grabber (mMouseEventLayerable) may be a different one from the
   clicked layerable determined here. For example, if a non-selectable layerable is in front of a
   selectable layerable at the click position, the front layerable will receive mouse events but the
   selectable one in the back will receive the \ref QCPLayerable::selectEvent.
 
   \see processRectSelection, QCPLayerable::selectTest
 */
 void QCustomPlot::processPointSelection(QMouseEvent *event)
 {
     QVariant details;
     QCPLayerable *clickedLayerable = layerableAt(event->pos(), true, &details);
     bool selectionStateChanged     = false;
     bool additive = mInteractions.testFlag(QCP::iMultiSelect) && event->modifiers().testFlag(mMultiSelectModifier);
     // deselect all other layerables if not additive selection:
     if (!additive)
     {
         foreach (QCPLayer *layer, mLayers)
         {
             foreach (QCPLayerable *layerable, layer->children())
             {
                 if (layerable != clickedLayerable && mInteractions.testFlag(layerable->selectionCategory()))
                 {
                     bool selChanged = false;
                     layerable->deselectEvent(&selChanged);
                     selectionStateChanged |= selChanged;
                 }
             }
         }
     }
     if (clickedLayerable && mInteractions.testFlag(clickedLayerable->selectionCategory()))
     {
         // a layerable was actually clicked, call its selectEvent:
         bool selChanged = false;
         clickedLayerable->selectEvent(event, additive, details, &selChanged);
         selectionStateChanged |= selChanged;
     }
     if (selectionStateChanged)
     {
         emit selectionChangedByUser();
         replot(rpQueuedReplot);
     }
 }
 
 /*! \internal
 
   Registers the specified plottable with this QCustomPlot and, if \ref setAutoAddPlottableToLegend
   is enabled, adds it to the legend (QCustomPlot::legend). QCustomPlot takes ownership of the
   plottable.
 
   Returns true on success, i.e. when \a plottable isn't already in this plot and the parent plot of
   \a plottable is this QCustomPlot.
 
   This method is called automatically in the QCPAbstractPlottable base class constructor.
 */
 bool QCustomPlot::registerPlottable(QCPAbstractPlottable *plottable)
 {
     if (mPlottables.contains(plottable))
     {
         qDebug() << Q_FUNC_INFO
                  << "plottable already added to this QCustomPlot:" << reinterpret_cast<quintptr>(plottable);
         return false;
     }
     if (plottable->parentPlot() != this)
     {
         qDebug() << Q_FUNC_INFO
                  << "plottable not created with this QCustomPlot as parent:" << reinterpret_cast<quintptr>(plottable);
         return false;
     }
 
     mPlottables.append(plottable);
     // possibly add plottable to legend:
     if (mAutoAddPlottableToLegend)
         plottable->addToLegend();
     if (!plottable
              ->layer()) // usually the layer is already set in the constructor of the plottable (via QCPLayerable constructor)
         plottable->setLayer(currentLayer());
     return true;
 }
 
 /*! \internal
 
   In order to maintain the simplified graph interface of QCustomPlot, this method is called by the
   QCPGraph constructor to register itself with this QCustomPlot's internal graph list. Returns true
   on success, i.e. if \a graph is valid and wasn't already registered with this QCustomPlot.
 
   This graph specific registration happens in addition to the call to \ref registerPlottable by the
   QCPAbstractPlottable base class.
 */
 bool QCustomPlot::registerGraph(QCPGraph *graph)
 {
     if (!graph)
     {
         qDebug() << Q_FUNC_INFO << "passed graph is zero";
         return false;
     }
     if (mGraphs.contains(graph))
     {
         qDebug() << Q_FUNC_INFO << "graph already registered with this QCustomPlot";
         return false;
     }
 
     mGraphs.append(graph);
     return true;
 }
 
 /*! \internal
 
   Registers the specified item with this QCustomPlot. QCustomPlot takes ownership of the item.
 
   Returns true on success, i.e. when \a item wasn't already in the plot and the parent plot of \a
   item is this QCustomPlot.
 
   This method is called automatically in the QCPAbstractItem base class constructor.
 */
 bool QCustomPlot::registerItem(QCPAbstractItem *item)
 {
     if (mItems.contains(item))
     {
         qDebug() << Q_FUNC_INFO << "item already added to this QCustomPlot:" << reinterpret_cast<quintptr>(item);
         return false;
     }
     if (item->parentPlot() != this)
     {
         qDebug() << Q_FUNC_INFO
                  << "item not created with this QCustomPlot as parent:" << reinterpret_cast<quintptr>(item);
         return false;
     }
 
     mItems.append(item);
     if (!item->layer()) // usually the layer is already set in the constructor of the item (via QCPLayerable constructor)
         item->setLayer(currentLayer());
     return true;
 }
 
 /*! \internal
 
   Assigns all layers their index (QCPLayer::mIndex) in the mLayers list. This method is thus called
   after every operation that changes the layer indices, like layer removal, layer creation, layer
   moving.
 */
 void QCustomPlot::updateLayerIndices() const
 {
     for (int i = 0; i < mLayers.size(); ++i)
         mLayers.at(i)->mIndex = i;
 }
 
 /*! \internal
 
   Returns the top-most layerable at pixel position \a pos. If \a onlySelectable is set to true,
   only those layerables that are selectable will be considered. (Layerable subclasses communicate
   their selectability via the QCPLayerable::selectTest method, by returning -1.)
 
   \a selectionDetails is an output parameter that contains selection specifics of the affected
   layerable. This is useful if the respective layerable shall be given a subsequent
   QCPLayerable::selectEvent (like in \ref mouseReleaseEvent). \a selectionDetails usually contains
   information about which part of the layerable was hit, in multi-part layerables (e.g.
   QCPAxis::SelectablePart). If the layerable is a plottable, \a selectionDetails contains a \ref
   QCPDataSelection instance with the single data point which is closest to \a pos.
 
   \see layerableListAt, layoutElementAt, axisRectAt
 */
 QCPLayerable *QCustomPlot::layerableAt(const QPointF &pos, bool onlySelectable, QVariant *selectionDetails) const
 {
     QList<QVariant> details;
-    QList<QCPLayerable *> candidates = layerableListAt(pos, onlySelectable, selectionDetails ? &details : 0);
+    QList<QCPLayerable *> candidates = layerableListAt(pos, onlySelectable, selectionDetails ? &details : nullptr);
     if (selectionDetails && !details.isEmpty())
         *selectionDetails = details.first();
     if (!candidates.isEmpty())
         return candidates.first();
     else
-        return 0;
+        return nullptr;
 }
 
 /*! \internal
 
   Returns the layerables at pixel position \a pos. If \a onlySelectable is set to true, only those
   layerables that are selectable will be considered. (Layerable subclasses communicate their
   selectability via the QCPLayerable::selectTest method, by returning -1.)
 
   The returned list is sorted by the layerable/drawing order. If you only need to know the top-most
   layerable, rather use \ref layerableAt.
 
   \a selectionDetails is an output parameter that contains selection specifics of the affected
   layerable. This is useful if the respective layerable shall be given a subsequent
   QCPLayerable::selectEvent (like in \ref mouseReleaseEvent). \a selectionDetails usually contains
   information about which part of the layerable was hit, in multi-part layerables (e.g.
   QCPAxis::SelectablePart). If the layerable is a plottable, \a selectionDetails contains a \ref
   QCPDataSelection instance with the single data point which is closest to \a pos.
 
   \see layerableAt, layoutElementAt, axisRectAt
 */
 QList<QCPLayerable *> QCustomPlot::layerableListAt(const QPointF &pos, bool onlySelectable,
                                                    QList<QVariant> *selectionDetails) const
 {
     QList<QCPLayerable *> result;
     for (int layerIndex = mLayers.size() - 1; layerIndex >= 0; --layerIndex)
     {
         const QList<QCPLayerable *> layerables = mLayers.at(layerIndex)->children();
         for (int i = layerables.size() - 1; i >= 0; --i)
         {
             if (!layerables.at(i)->realVisibility())
                 continue;
             QVariant details;
-            double dist = layerables.at(i)->selectTest(pos, onlySelectable, selectionDetails ? &details : 0);
+            double dist = layerables.at(i)->selectTest(pos, onlySelectable, selectionDetails ? &details : nullptr);
             if (dist >= 0 && dist < selectionTolerance())
             {
                 result.append(layerables.at(i));
                 if (selectionDetails)
                     selectionDetails->append(details);
             }
         }
     }
     return result;
 }
 
 /*!
   Saves the plot to a rastered image file \a fileName in the image format \a format. The plot is
   sized to \a width and \a height in pixels and scaled with \a scale. (width 100 and scale 2.0 lead
   to a full resolution file with width 200.) If the \a format supports compression, \a quality may
   be between 0 and 100 to control it.
 
   Returns true on success. If this function fails, most likely the given \a format isn't supported
   by the system, see Qt docs about QImageWriter::supportedImageFormats().
 
   The \a resolution will be written to the image file header (if the file format supports this) and
   has no direct consequence for the quality or the pixel size. However, if opening the image with a
   tool which respects the metadata, it will be able to scale the image to match either a given size
   in real units of length (inch, centimeters, etc.), or the target display DPI. You can specify in
   which units \a resolution is given, by setting \a resolutionUnit. The \a resolution is converted
   to the format's expected resolution unit internally.
 
   \see saveBmp, saveJpg, savePng, savePdf
 */
 bool QCustomPlot::saveRastered(const QString &fileName, int width, int height, double scale, const char *format,
                                int quality, int resolution, QCP::ResolutionUnit resolutionUnit)
 {
     QImage buffer = toPixmap(width, height, scale).toImage();
 
     int dotsPerMeter = 0;
     switch (resolutionUnit)
     {
         case QCP::ruDotsPerMeter:
             dotsPerMeter = resolution;
             break;
         case QCP::ruDotsPerCentimeter:
             dotsPerMeter = resolution * 100;
             break;
         case QCP::ruDotsPerInch:
             dotsPerMeter = resolution / 0.0254;
             break;
     }
     buffer.setDotsPerMeterX(
         dotsPerMeter); // this is saved together with some image formats, e.g. PNG, and is relevant when opening image in other tools
     buffer.setDotsPerMeterY(
         dotsPerMeter); // this is saved together with some image formats, e.g. PNG, and is relevant when opening image in other tools
     if (!buffer.isNull())
         return buffer.save(fileName, format, quality);
     else
         return false;
 }
 
 /*!
   Renders the plot to a pixmap and returns it.
 
   The plot is sized to \a width and \a height in pixels and scaled with \a scale. (width 100 and
   scale 2.0 lead to a full resolution pixmap with width 200.)
 
   \see toPainter, saveRastered, saveBmp, savePng, saveJpg, savePdf
 */
 QPixmap QCustomPlot::toPixmap(int width, int height, double scale)
 {
     // this method is somewhat similar to toPainter. Change something here, and a change in toPainter might be necessary, too.
     int newWidth, newHeight;
     if (width == 0 || height == 0)
     {
         newWidth  = this->width();
         newHeight = this->height();
     }
     else
     {
         newWidth  = width;
         newHeight = height;
     }
     int scaledWidth  = qRound(scale * newWidth);
     int scaledHeight = qRound(scale * newHeight);
 
     QPixmap result(scaledWidth, scaledHeight);
     result.fill(mBackgroundBrush.style() == Qt::SolidPattern ?
                     mBackgroundBrush.color() :
                     Qt::transparent); // if using non-solid pattern, make transparent now and draw brush pattern later
     QCPPainter painter;
     painter.begin(&result);
     if (painter.isActive())
     {
         QRect oldViewport = viewport();
         setViewport(QRect(0, 0, newWidth, newHeight));
         painter.setMode(QCPPainter::pmNoCaching);
         if (!qFuzzyCompare(scale, 1.0))
         {
             if (scale >
                 1.0) // for scale < 1 we always want cosmetic pens where possible, because else lines might disappear for very small scales
                 painter.setMode(QCPPainter::pmNonCosmetic);
             painter.scale(scale, scale);
         }
         if (mBackgroundBrush.style() != Qt::SolidPattern &&
             mBackgroundBrush.style() != Qt::NoBrush) // solid fills were done a few lines above with QPixmap::fill
             painter.fillRect(mViewport, mBackgroundBrush);
         draw(&painter);
         setViewport(oldViewport);
         painter.end();
     }
     else // might happen if pixmap has width or height zero
     {
         qDebug() << Q_FUNC_INFO << "Couldn't activate painter on pixmap";
         return QPixmap();
     }
     return result;
 }
 
 /*!
   Renders the plot using the passed \a painter.
 
   The plot is sized to \a width and \a height in pixels. If the \a painter's scale is not 1.0, the resulting plot will
   appear scaled accordingly.
 
   \note If you are restricted to using a QPainter (instead of QCPPainter), create a temporary QPicture and open a QCPPainter
   on it. Then call \ref toPainter with this QCPPainter. After ending the paint operation on the picture, draw it with
   the QPainter. This will reproduce the painter actions the QCPPainter took, with a QPainter.
 
   \see toPixmap
 */
 void QCustomPlot::toPainter(QCPPainter *painter, int width, int height)
 {
     // this method is somewhat similar to toPixmap. Change something here, and a change in toPixmap might be necessary, too.
     int newWidth, newHeight;
     if (width == 0 || height == 0)
     {
         newWidth  = this->width();
         newHeight = this->height();
     }
     else
     {
         newWidth  = width;
         newHeight = height;
     }
 
     if (painter->isActive())
     {
         QRect oldViewport = viewport();
         setViewport(QRect(0, 0, newWidth, newHeight));
         painter->setMode(QCPPainter::pmNoCaching);
         if (mBackgroundBrush.style() !=
             Qt::NoBrush) // unlike in toPixmap, we can't do QPixmap::fill for Qt::SolidPattern brush style, so we also draw solid fills with fillRect here
             painter->fillRect(mViewport, mBackgroundBrush);
         draw(painter);
         setViewport(oldViewport);
     }
     else
         qDebug() << Q_FUNC_INFO << "Passed painter is not active";
 }
 /* end of 'src/core.cpp' */
 
 //amalgamation: add plottable1d.cpp
 
 /* including file 'src/colorgradient.cpp', size 24646                        */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPColorGradient
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPColorGradient
   \brief Defines a color gradient for use with e.g. \ref QCPColorMap
 
   This class describes a color gradient which can be used to encode data with color. For example,
   QCPColorMap and QCPColorScale have \ref QCPColorMap::setGradient "setGradient" methods which
   take an instance of this class. Colors are set with \ref setColorStopAt(double position, const QColor &color)
   with a \a position from 0 to 1. In between these defined color positions, the
   color will be interpolated linearly either in RGB or HSV space, see \ref setColorInterpolation.
 
   Alternatively, load one of the preset color gradients shown in the image below, with \ref
   loadPreset, or by directly specifying the preset in the constructor.
 
   Apart from red, green and blue components, the gradient also interpolates the alpha values of the
   configured color stops. This allows to display some portions of the data range as transparent in
   the plot.
 
   \image html QCPColorGradient.png
 
   The \ref QCPColorGradient(GradientPreset preset) constructor allows directly converting a \ref
   GradientPreset to a QCPColorGradient. This means that you can directly pass \ref GradientPreset
   to all the \a setGradient methods, e.g.:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcolorgradient-setgradient
 
   The total number of levels used in the gradient can be set with \ref setLevelCount. Whether the
   color gradient shall be applied periodically (wrapping around) to data values that lie outside
   the data range specified on the plottable instance can be controlled with \ref setPeriodic.
 */
 
 /*!
   Constructs a new, empty QCPColorGradient with no predefined color stops. You can add own color
   stops with \ref setColorStopAt.
 
   The color level count is initialized to 350.
 */
 QCPColorGradient::QCPColorGradient()
     : mLevelCount(350), mColorInterpolation(ciRGB), mPeriodic(false), mColorBufferInvalidated(true)
 {
     mColorBuffer.fill(qRgb(0, 0, 0), mLevelCount);
 }
 
 /*!
   Constructs a new QCPColorGradient initialized with the colors and color interpolation according
   to \a preset.
 
   The color level count is initialized to 350.
 */
 QCPColorGradient::QCPColorGradient(GradientPreset preset)
     : mLevelCount(350), mColorInterpolation(ciRGB), mPeriodic(false), mColorBufferInvalidated(true)
 {
     mColorBuffer.fill(qRgb(0, 0, 0), mLevelCount);
     loadPreset(preset);
 }
 
 /* undocumented operator */
 bool QCPColorGradient::operator==(const QCPColorGradient &other) const
 {
     return ((other.mLevelCount == this->mLevelCount) && (other.mColorInterpolation == this->mColorInterpolation) &&
             (other.mPeriodic == this->mPeriodic) && (other.mColorStops == this->mColorStops));
 }
 
 /*!
   Sets the number of discretization levels of the color gradient to \a n. The default is 350 which
   is typically enough to create a smooth appearance. The minimum number of levels is 2.
 
   \image html QCPColorGradient-levelcount.png
 */
 void QCPColorGradient::setLevelCount(int n)
 {
     if (n < 2)
     {
         qDebug() << Q_FUNC_INFO << "n must be greater or equal 2 but was" << n;
         n = 2;
     }
     if (n != mLevelCount)
     {
         mLevelCount             = n;
         mColorBufferInvalidated = true;
     }
 }
 
 /*!
   Sets at which positions from 0 to 1 which color shall occur. The positions are the keys, the
   colors are the values of the passed QMap \a colorStops. In between these color stops, the color
   is interpolated according to \ref setColorInterpolation.
 
   A more convenient way to create a custom gradient may be to clear all color stops with \ref
   clearColorStops (or creating a new, empty QCPColorGradient) and then adding them one by one with
   \ref setColorStopAt.
 
   \see clearColorStops
 */
 void QCPColorGradient::setColorStops(const QMap<double, QColor> &colorStops)
 {
     mColorStops             = colorStops;
     mColorBufferInvalidated = true;
 }
 
 /*!
   Sets the \a color the gradient will have at the specified \a position (from 0 to 1). In between
   these color stops, the color is interpolated according to \ref setColorInterpolation.
 
   \see setColorStops, clearColorStops
 */
 void QCPColorGradient::setColorStopAt(double position, const QColor &color)
 {
     mColorStops.insert(position, color);
     mColorBufferInvalidated = true;
 }
 
 /*!
   Sets whether the colors in between the configured color stops (see \ref setColorStopAt) shall be
   interpolated linearly in RGB or in HSV color space.
 
   For example, a sweep in RGB space from red to green will have a muddy brown intermediate color,
   whereas in HSV space the intermediate color is yellow.
 */
 void QCPColorGradient::setColorInterpolation(QCPColorGradient::ColorInterpolation interpolation)
 {
     if (interpolation != mColorInterpolation)
     {
         mColorInterpolation     = interpolation;
         mColorBufferInvalidated = true;
     }
 }
 
 /*!
   Sets whether data points that are outside the configured data range (e.g. \ref
   QCPColorMap::setDataRange) are colored by periodically repeating the color gradient or whether
   they all have the same color, corresponding to the respective gradient boundary color.
 
   \image html QCPColorGradient-periodic.png
 
   As shown in the image above, gradients that have the same start and end color are especially
   suitable for a periodic gradient mapping, since they produce smooth color transitions throughout
   the color map. A preset that has this property is \ref gpHues.
 
   In practice, using periodic color gradients makes sense when the data corresponds to a periodic
   dimension, such as an angle or a phase. If this is not the case, the color encoding might become
   ambiguous, because multiple different data values are shown as the same color.
 */
 void QCPColorGradient::setPeriodic(bool enabled)
 {
     mPeriodic = enabled;
 }
 
 /*! \overload
 
   This method is used to quickly convert a \a data array to colors. The colors will be output in
   the array \a scanLine. Both \a data and \a scanLine must have the length \a n when passed to this
   function. The data range that shall be used for mapping the data value to the gradient is passed
   in \a range. \a logarithmic indicates whether the data values shall be mapped to colors
   logarithmically.
 
   if \a data actually contains 2D-data linearized via <tt>[row*columnCount + column]</tt>, you can
   set \a dataIndexFactor to <tt>columnCount</tt> to convert a column instead of a row of the data
   array, in \a scanLine. \a scanLine will remain a regular (1D) array. This works because \a data
   is addressed <tt>data[i*dataIndexFactor]</tt>.
 
   Use the overloaded method to additionally provide alpha map data.
 
   The QRgb values that are placed in \a scanLine have their r, g and b components premultiplied
   with alpha (see QImage::Format_ARGB32_Premultiplied).
 */
 void QCPColorGradient::colorize(const double *data, const QCPRange &range, QRgb *scanLine, int n, int dataIndexFactor,
                                 bool logarithmic)
 {
     // If you change something here, make sure to also adapt color() and the other colorize() overload
     if (!data)
     {
         qDebug() << Q_FUNC_INFO << "null pointer given as data";
         return;
     }
     if (!scanLine)
     {
         qDebug() << Q_FUNC_INFO << "null pointer given as scanLine";
         return;
     }
     if (mColorBufferInvalidated)
         updateColorBuffer();
 
     if (!logarithmic)
     {
         const double posToIndexFactor = (mLevelCount - 1) / range.size();
         if (mPeriodic)
         {
             for (int i = 0; i < n; ++i)
             {
                 int index = (int)((data[dataIndexFactor * i] - range.lower) * posToIndexFactor) % mLevelCount;
                 if (index < 0)
                     index += mLevelCount;
                 scanLine[i] = mColorBuffer.at(index);
             }
         }
         else
         {
             for (int i = 0; i < n; ++i)
             {
                 int index = (data[dataIndexFactor * i] - range.lower) * posToIndexFactor;
                 if (index < 0)
                     index = 0;
                 else if (index >= mLevelCount)
                     index = mLevelCount - 1;
                 scanLine[i] = mColorBuffer.at(index);
             }
         }
     }
     else // logarithmic == true
     {
         if (mPeriodic)
         {
             for (int i = 0; i < n; ++i)
             {
                 int index = (int)(qLn(data[dataIndexFactor * i] / range.lower) / qLn(range.upper / range.lower) *
                                   (mLevelCount - 1)) %
                             mLevelCount;
                 if (index < 0)
                     index += mLevelCount;
                 scanLine[i] = mColorBuffer.at(index);
             }
         }
         else
         {
             for (int i = 0; i < n; ++i)
             {
                 int index =
                     qLn(data[dataIndexFactor * i] / range.lower) / qLn(range.upper / range.lower) * (mLevelCount - 1);
                 if (index < 0)
                     index = 0;
                 else if (index >= mLevelCount)
                     index = mLevelCount - 1;
                 scanLine[i] = mColorBuffer.at(index);
             }
         }
     }
 }
 
 /*! \overload
 
   Additionally to the other overload of \ref colorize, this method takes the array \a alpha, which
   has the same size and structure as \a data and encodes the alpha information per data point.
 
   The QRgb values that are placed in \a scanLine have their r, g and b components premultiplied
   with alpha (see QImage::Format_ARGB32_Premultiplied).
 */
 void QCPColorGradient::colorize(const double *data, const unsigned char *alpha, const QCPRange &range, QRgb *scanLine,
                                 int n, int dataIndexFactor, bool logarithmic)
 {
     // If you change something here, make sure to also adapt color() and the other colorize() overload
     if (!data)
     {
         qDebug() << Q_FUNC_INFO << "null pointer given as data";
         return;
     }
     if (!alpha)
     {
         qDebug() << Q_FUNC_INFO << "null pointer given as alpha";
         return;
     }
     if (!scanLine)
     {
         qDebug() << Q_FUNC_INFO << "null pointer given as scanLine";
         return;
     }
     if (mColorBufferInvalidated)
         updateColorBuffer();
 
     if (!logarithmic)
     {
         const double posToIndexFactor = (mLevelCount - 1) / range.size();
         if (mPeriodic)
         {
             for (int i = 0; i < n; ++i)
             {
                 int index = (int)((data[dataIndexFactor * i] - range.lower) * posToIndexFactor) % mLevelCount;
                 if (index < 0)
                     index += mLevelCount;
                 if (alpha[dataIndexFactor * i] == 255)
                 {
                     scanLine[i] = mColorBuffer.at(index);
                 }
                 else
                 {
                     const QRgb rgb     = mColorBuffer.at(index);
                     const float alphaF = alpha[dataIndexFactor * i] / 255.0f;
                     scanLine[i] =
                         qRgba(qRed(rgb) * alphaF, qGreen(rgb) * alphaF, qBlue(rgb) * alphaF, qAlpha(rgb) * alphaF);
                 }
             }
         }
         else
         {
             for (int i = 0; i < n; ++i)
             {
                 int index = (data[dataIndexFactor * i] - range.lower) * posToIndexFactor;
                 if (index < 0)
                     index = 0;
                 else if (index >= mLevelCount)
                     index = mLevelCount - 1;
                 if (alpha[dataIndexFactor * i] == 255)
                 {
                     scanLine[i] = mColorBuffer.at(index);
                 }
                 else
                 {
                     const QRgb rgb     = mColorBuffer.at(index);
                     const float alphaF = alpha[dataIndexFactor * i] / 255.0f;
                     scanLine[i] =
                         qRgba(qRed(rgb) * alphaF, qGreen(rgb) * alphaF, qBlue(rgb) * alphaF, qAlpha(rgb) * alphaF);
                 }
             }
         }
     }
     else // logarithmic == true
     {
         if (mPeriodic)
         {
             for (int i = 0; i < n; ++i)
             {
                 int index = (int)(qLn(data[dataIndexFactor * i] / range.lower) / qLn(range.upper / range.lower) *
                                   (mLevelCount - 1)) %
                             mLevelCount;
                 if (index < 0)
                     index += mLevelCount;
                 if (alpha[dataIndexFactor * i] == 255)
                 {
                     scanLine[i] = mColorBuffer.at(index);
                 }
                 else
                 {
                     const QRgb rgb     = mColorBuffer.at(index);
                     const float alphaF = alpha[dataIndexFactor * i] / 255.0f;
                     scanLine[i] =
                         qRgba(qRed(rgb) * alphaF, qGreen(rgb) * alphaF, qBlue(rgb) * alphaF, qAlpha(rgb) * alphaF);
                 }
             }
         }
         else
         {
             for (int i = 0; i < n; ++i)
             {
                 int index =
                     qLn(data[dataIndexFactor * i] / range.lower) / qLn(range.upper / range.lower) * (mLevelCount - 1);
                 if (index < 0)
                     index = 0;
                 else if (index >= mLevelCount)
                     index = mLevelCount - 1;
                 if (alpha[dataIndexFactor * i] == 255)
                 {
                     scanLine[i] = mColorBuffer.at(index);
                 }
                 else
                 {
                     const QRgb rgb     = mColorBuffer.at(index);
                     const float alphaF = alpha[dataIndexFactor * i] / 255.0f;
                     scanLine[i] =
                         qRgba(qRed(rgb) * alphaF, qGreen(rgb) * alphaF, qBlue(rgb) * alphaF, qAlpha(rgb) * alphaF);
                 }
             }
         }
     }
 }
 
 /*! \internal
 
   This method is used to colorize a single data value given in \a position, to colors. The data
   range that shall be used for mapping the data value to the gradient is passed in \a range. \a
   logarithmic indicates whether the data value shall be mapped to a color logarithmically.
 
   If an entire array of data values shall be converted, rather use \ref colorize, for better
   performance.
 
   The returned QRgb has its r, g and b components premultiplied with alpha (see
   QImage::Format_ARGB32_Premultiplied).
 */
 QRgb QCPColorGradient::color(double position, const QCPRange &range, bool logarithmic)
 {
     // If you change something here, make sure to also adapt ::colorize()
     if (mColorBufferInvalidated)
         updateColorBuffer();
     int index = 0;
     if (!logarithmic)
         index = (position - range.lower) * (mLevelCount - 1) / range.size();
     else
         index = qLn(position / range.lower) / qLn(range.upper / range.lower) * (mLevelCount - 1);
     if (mPeriodic)
     {
         index = index % mLevelCount;
         if (index < 0)
             index += mLevelCount;
     }
     else
     {
         if (index < 0)
             index = 0;
         else if (index >= mLevelCount)
             index = mLevelCount - 1;
     }
     return mColorBuffer.at(index);
 }
 
 /*!
   Clears the current color stops and loads the specified \a preset. A preset consists of predefined
   color stops and the corresponding color interpolation method.
 
   The available presets are:
   \image html QCPColorGradient.png
 */
 void QCPColorGradient::loadPreset(GradientPreset preset)
 {
     clearColorStops();
     switch (preset)
     {
         case gpGrayscale:
             setColorInterpolation(ciRGB);
             setColorStopAt(0, Qt::black);
             setColorStopAt(1, Qt::white);
             break;
         case gpHot:
             setColorInterpolation(ciRGB);
             setColorStopAt(0, QColor(50, 0, 0));
             setColorStopAt(0.2, QColor(180, 10, 0));
             setColorStopAt(0.4, QColor(245, 50, 0));
             setColorStopAt(0.6, QColor(255, 150, 10));
             setColorStopAt(0.8, QColor(255, 255, 50));
             setColorStopAt(1, QColor(255, 255, 255));
             break;
         case gpCold:
             setColorInterpolation(ciRGB);
             setColorStopAt(0, QColor(0, 0, 50));
             setColorStopAt(0.2, QColor(0, 10, 180));
             setColorStopAt(0.4, QColor(0, 50, 245));
             setColorStopAt(0.6, QColor(10, 150, 255));
             setColorStopAt(0.8, QColor(50, 255, 255));
             setColorStopAt(1, QColor(255, 255, 255));
             break;
         case gpNight:
             setColorInterpolation(ciHSV);
             setColorStopAt(0, QColor(10, 20, 30));
             setColorStopAt(1, QColor(250, 255, 250));
             break;
         case gpCandy:
             setColorInterpolation(ciHSV);
             setColorStopAt(0, QColor(0, 0, 255));
             setColorStopAt(1, QColor(255, 250, 250));
             break;
         case gpGeography:
             setColorInterpolation(ciRGB);
             setColorStopAt(0, QColor(70, 170, 210));
             setColorStopAt(0.20, QColor(90, 160, 180));
             setColorStopAt(0.25, QColor(45, 130, 175));
             setColorStopAt(0.30, QColor(100, 140, 125));
             setColorStopAt(0.5, QColor(100, 140, 100));
             setColorStopAt(0.6, QColor(130, 145, 120));
             setColorStopAt(0.7, QColor(140, 130, 120));
             setColorStopAt(0.9, QColor(180, 190, 190));
             setColorStopAt(1, QColor(210, 210, 230));
             break;
         case gpIon:
             setColorInterpolation(ciHSV);
             setColorStopAt(0, QColor(50, 10, 10));
             setColorStopAt(0.45, QColor(0, 0, 255));
             setColorStopAt(0.8, QColor(0, 255, 255));
             setColorStopAt(1, QColor(0, 255, 0));
             break;
         case gpThermal:
             setColorInterpolation(ciRGB);
             setColorStopAt(0, QColor(0, 0, 50));
             setColorStopAt(0.15, QColor(20, 0, 120));
             setColorStopAt(0.33, QColor(200, 30, 140));
             setColorStopAt(0.6, QColor(255, 100, 0));
             setColorStopAt(0.85, QColor(255, 255, 40));
             setColorStopAt(1, QColor(255, 255, 255));
             break;
         case gpPolar:
             setColorInterpolation(ciRGB);
             setColorStopAt(0, QColor(50, 255, 255));
             setColorStopAt(0.18, QColor(10, 70, 255));
             setColorStopAt(0.28, QColor(10, 10, 190));
             setColorStopAt(0.5, QColor(0, 0, 0));
             setColorStopAt(0.72, QColor(190, 10, 10));
             setColorStopAt(0.82, QColor(255, 70, 10));
             setColorStopAt(1, QColor(255, 255, 50));
             break;
         case gpSpectrum:
             setColorInterpolation(ciHSV);
             setColorStopAt(0, QColor(50, 0, 50));
             setColorStopAt(0.15, QColor(0, 0, 255));
             setColorStopAt(0.35, QColor(0, 255, 255));
             setColorStopAt(0.6, QColor(255, 255, 0));
             setColorStopAt(0.75, QColor(255, 30, 0));
             setColorStopAt(1, QColor(50, 0, 0));
             break;
         case gpJet:
             setColorInterpolation(ciRGB);
             setColorStopAt(0, QColor(0, 0, 100));
             setColorStopAt(0.15, QColor(0, 50, 255));
             setColorStopAt(0.35, QColor(0, 255, 255));
             setColorStopAt(0.65, QColor(255, 255, 0));
             setColorStopAt(0.85, QColor(255, 30, 0));
             setColorStopAt(1, QColor(100, 0, 0));
             break;
         case gpHues:
             setColorInterpolation(ciHSV);
             setColorStopAt(0, QColor(255, 0, 0));
             setColorStopAt(1.0 / 3.0, QColor(0, 0, 255));
             setColorStopAt(2.0 / 3.0, QColor(0, 255, 0));
             setColorStopAt(1, QColor(255, 0, 0));
             break;
     }
 }
 
 /*!
   Clears all color stops.
 
   \see setColorStops, setColorStopAt
 */
 void QCPColorGradient::clearColorStops()
 {
     mColorStops.clear();
     mColorBufferInvalidated = true;
 }
 
 /*!
   Returns an inverted gradient. The inverted gradient has all properties as this \ref
   QCPColorGradient, but the order of the color stops is inverted.
 
   \see setColorStops, setColorStopAt
 */
 QCPColorGradient QCPColorGradient::inverted() const
 {
     QCPColorGradient result(*this);
     result.clearColorStops();
     for (QMap<double, QColor>::const_iterator it = mColorStops.constBegin(); it != mColorStops.constEnd(); ++it)
         result.setColorStopAt(1.0 - it.key(), it.value());
     return result;
 }
 
 /*! \internal
 
   Returns true if the color gradient uses transparency, i.e. if any of the configured color stops
   has an alpha value below 255.
 */
 bool QCPColorGradient::stopsUseAlpha() const
 {
     for (QMap<double, QColor>::const_iterator it = mColorStops.constBegin(); it != mColorStops.constEnd(); ++it)
     {
         if (it.value().alpha() < 255)
             return true;
     }
     return false;
 }
 
 /*! \internal
 
   Updates the internal color buffer which will be used by \ref colorize and \ref color, to quickly
   convert positions to colors. This is where the interpolation between color stops is calculated.
 */
 void QCPColorGradient::updateColorBuffer()
 {
     if (mColorBuffer.size() != mLevelCount)
         mColorBuffer.resize(mLevelCount);
     if (mColorStops.size() > 1)
     {
         double indexToPosFactor = 1.0 / (double)(mLevelCount - 1);
         const bool useAlpha     = stopsUseAlpha();
         for (int i = 0; i < mLevelCount; ++i)
         {
             double position = i * indexToPosFactor;
             QMap<double, QColor>::const_iterator it =
                 const_cast<const QMap<double, QColor> &>(mColorStops).lowerBound(position);
             if (it == mColorStops.constEnd()) // position is on or after last stop, use color of last stop
             {
                 mColorBuffer[i] = (it - 1).value().rgba();
             }
             else if (it == mColorStops.constBegin()) // position is on or before first stop, use color of first stop
             {
                 mColorBuffer[i] = it.value().rgba();
             }
             else // position is in between stops (or on an intermediate stop), interpolate color
             {
                 QMap<double, QColor>::const_iterator high = it;
                 QMap<double, QColor>::const_iterator low  = it - 1;
                 double t = (position - low.key()) / (high.key() - low.key()); // interpolation factor 0..1
                 switch (mColorInterpolation)
                 {
                     case ciRGB:
                     {
                         if (useAlpha)
                         {
                             const int alpha = (1 - t) * low.value().alpha() + t * high.value().alpha();
                             const float alphaPremultiplier =
                                 alpha / 255.0f; // since we use QImage::Format_ARGB32_Premultiplied
                             mColorBuffer[i] = qRgba(
                                 ((1 - t) * low.value().red() + t * high.value().red()) * alphaPremultiplier,
                                 ((1 - t) * low.value().green() + t * high.value().green()) * alphaPremultiplier,
                                 ((1 - t) * low.value().blue() + t * high.value().blue()) * alphaPremultiplier, alpha);
                         }
                         else
                         {
                             mColorBuffer[i] = qRgb(((1 - t) * low.value().red() + t * high.value().red()),
                                                    ((1 - t) * low.value().green() + t * high.value().green()),
                                                    ((1 - t) * low.value().blue() + t * high.value().blue()));
                         }
                         break;
                     }
                     case ciHSV:
                     {
                         QColor lowHsv  = low.value().toHsv();
                         QColor highHsv = high.value().toHsv();
                         double hue     = 0;
                         double hueDiff = highHsv.hueF() - lowHsv.hueF();
                         if (hueDiff > 0.5)
                             hue = lowHsv.hueF() - t * (1.0 - hueDiff);
                         else if (hueDiff < -0.5)
                             hue = lowHsv.hueF() + t * (1.0 + hueDiff);
                         else
                             hue = lowHsv.hueF() + t * hueDiff;
                         if (hue < 0)
                             hue += 1.0;
                         else if (hue >= 1.0)
                             hue -= 1.0;
                         if (useAlpha)
                         {
                             const QRgb rgb =
                                 QColor::fromHsvF(hue, (1 - t) * lowHsv.saturationF() + t * highHsv.saturationF(),
                                                  (1 - t) * lowHsv.valueF() + t * highHsv.valueF())
                                     .rgb();
                             const float alpha = (1 - t) * lowHsv.alphaF() + t * highHsv.alphaF();
                             mColorBuffer[i] =
                                 qRgba(qRed(rgb) * alpha, qGreen(rgb) * alpha, qBlue(rgb) * alpha, 255 * alpha);
                         }
                         else
                         {
                             mColorBuffer[i] =
                                 QColor::fromHsvF(hue, (1 - t) * lowHsv.saturationF() + t * highHsv.saturationF(),
                                                  (1 - t) * lowHsv.valueF() + t * highHsv.valueF())
                                     .rgb();
                         }
                         break;
                     }
                 }
             }
         }
     }
     else if (mColorStops.size() == 1)
     {
         const QRgb rgb    = mColorStops.constBegin().value().rgb();
         const float alpha = mColorStops.constBegin().value().alphaF();
         mColorBuffer.fill(qRgba(qRed(rgb) * alpha, qGreen(rgb) * alpha, qBlue(rgb) * alpha, 255 * alpha));
     }
     else // mColorStops is empty, fill color buffer with black
     {
         mColorBuffer.fill(qRgb(0, 0, 0));
     }
     mColorBufferInvalidated = false;
 }
 /* end of 'src/colorgradient.cpp' */
 
 /* including file 'src/selectiondecorator-bracket.cpp', size 12313           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPSelectionDecoratorBracket
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPSelectionDecoratorBracket
   \brief A selection decorator which draws brackets around each selected data segment
 
   Additionally to the regular highlighting of selected segments via color, fill and scatter style,
   this \ref QCPSelectionDecorator subclass draws markers at the begin and end of each selected data
   segment of the plottable.
 
   The shape of the markers can be controlled with \ref setBracketStyle, \ref setBracketWidth and
   \ref setBracketHeight. The color/fill can be controlled with \ref setBracketPen and \ref
   setBracketBrush.
 
   To introduce custom bracket styles, it is only necessary to sublcass \ref
   QCPSelectionDecoratorBracket and reimplement \ref drawBracket. The rest will be managed by the
   base class.
 */
 
 /*!
   Creates a new QCPSelectionDecoratorBracket instance with default values.
 */
 QCPSelectionDecoratorBracket::QCPSelectionDecoratorBracket()
     : mBracketPen(QPen(Qt::black)), mBracketBrush(Qt::NoBrush), mBracketWidth(5), mBracketHeight(50),
       mBracketStyle(bsSquareBracket), mTangentToData(false), mTangentAverage(2)
 {
 }
 
 QCPSelectionDecoratorBracket::~QCPSelectionDecoratorBracket()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the brackets at the beginning and end of each selected
   data segment.
 */
 void QCPSelectionDecoratorBracket::setBracketPen(const QPen &pen)
 {
     mBracketPen = pen;
 }
 
 /*!
   Sets the brush that will be used to draw the brackets at the beginning and end of each selected
   data segment.
 */
 void QCPSelectionDecoratorBracket::setBracketBrush(const QBrush &brush)
 {
     mBracketBrush = brush;
 }
 
 /*!
   Sets the width of the drawn bracket. The width dimension is always parallel to the key axis of
   the data, or the tangent direction of the current data slope, if \ref setTangentToData is
   enabled.
 */
 void QCPSelectionDecoratorBracket::setBracketWidth(int width)
 {
     mBracketWidth = width;
 }
 
 /*!
   Sets the height of the drawn bracket. The height dimension is always perpendicular to the key axis
   of the data, or the tangent direction of the current data slope, if \ref setTangentToData is
   enabled.
 */
 void QCPSelectionDecoratorBracket::setBracketHeight(int height)
 {
     mBracketHeight = height;
 }
 
 /*!
   Sets the shape that the bracket/marker will have.
 
   \see setBracketWidth, setBracketHeight
 */
 void QCPSelectionDecoratorBracket::setBracketStyle(QCPSelectionDecoratorBracket::BracketStyle style)
 {
     mBracketStyle = style;
 }
 
 /*!
   Sets whether the brackets will be rotated such that they align with the slope of the data at the
   position that they appear in.
 
   For noisy data, it might be more visually appealing to average the slope over multiple data
   points. This can be configured via \ref setTangentAverage.
 */
 void QCPSelectionDecoratorBracket::setTangentToData(bool enabled)
 {
     mTangentToData = enabled;
 }
 
 /*!
   Controls over how many data points the slope shall be averaged, when brackets shall be aligned
   with the data (if \ref setTangentToData is true).
 
   From the position of the bracket, \a pointCount points towards the selected data range will be
   taken into account. The smallest value of \a pointCount is 1, which is effectively equivalent to
   disabling \ref setTangentToData.
 */
 void QCPSelectionDecoratorBracket::setTangentAverage(int pointCount)
 {
     mTangentAverage = pointCount;
     if (mTangentAverage < 1)
         mTangentAverage = 1;
 }
 
 /*!
   Draws the bracket shape with \a painter. The parameter \a direction is either -1 or 1 and
   indicates whether the bracket shall point to the left or the right (i.e. is a closing or opening
   bracket, respectively).
 
   The passed \a painter already contains all transformations that are necessary to position and
   rotate the bracket appropriately. Painting operations can be performed as if drawing upright
   brackets on flat data with horizontal key axis, with (0, 0) being the center of the bracket.
 
   If you wish to sublcass \ref QCPSelectionDecoratorBracket in order to provide custom bracket
   shapes (see \ref QCPSelectionDecoratorBracket::bsUserStyle), this is the method you should
   reimplement.
 */
 void QCPSelectionDecoratorBracket::drawBracket(QCPPainter *painter, int direction) const
 {
     switch (mBracketStyle)
     {
         case bsSquareBracket:
         {
             painter->drawLine(QLineF(mBracketWidth * direction, -mBracketHeight * 0.5, 0, -mBracketHeight * 0.5));
             painter->drawLine(QLineF(mBracketWidth * direction, mBracketHeight * 0.5, 0, mBracketHeight * 0.5));
             painter->drawLine(QLineF(0, -mBracketHeight * 0.5, 0, mBracketHeight * 0.5));
             break;
         }
         case bsHalfEllipse:
         {
             painter->drawArc(-mBracketWidth * 0.5, -mBracketHeight * 0.5, mBracketWidth, mBracketHeight, -90 * 16,
                              -180 * 16 * direction);
             break;
         }
         case bsEllipse:
         {
             painter->drawEllipse(-mBracketWidth * 0.5, -mBracketHeight * 0.5, mBracketWidth, mBracketHeight);
             break;
         }
         case bsPlus:
         {
             painter->drawLine(QLineF(0, -mBracketHeight * 0.5, 0, mBracketHeight * 0.5));
             painter->drawLine(QLineF(-mBracketWidth * 0.5, 0, mBracketWidth * 0.5, 0));
             break;
         }
         default:
         {
             qDebug() << Q_FUNC_INFO << "unknown/custom bracket style can't be handeld by default implementation:"
                      << static_cast<int>(mBracketStyle);
             break;
         }
     }
 }
 
 /*!
   Draws the bracket decoration on the data points at the begin and end of each selected data
   segment given in \a seletion.
 
   It uses the method \ref drawBracket to actually draw the shapes.
 
   \seebaseclassmethod
 */
 void QCPSelectionDecoratorBracket::drawDecoration(QCPPainter *painter, QCPDataSelection selection)
 {
     if (!mPlottable || selection.isEmpty())
         return;
 
     if (QCPPlottableInterface1D *interface1d = mPlottable->interface1D())
     {
         foreach (const QCPDataRange &dataRange, selection.dataRanges())
         {
             // determine position and (if tangent mode is enabled) angle of brackets:
             int openBracketDir       = (mPlottable->keyAxis() && !mPlottable->keyAxis()->rangeReversed()) ? 1 : -1;
             int closeBracketDir      = -openBracketDir;
             QPointF openBracketPos   = getPixelCoordinates(interface1d, dataRange.begin());
             QPointF closeBracketPos  = getPixelCoordinates(interface1d, dataRange.end() - 1);
             double openBracketAngle  = 0;
             double closeBracketAngle = 0;
             if (mTangentToData)
             {
                 openBracketAngle  = getTangentAngle(interface1d, dataRange.begin(), openBracketDir);
                 closeBracketAngle = getTangentAngle(interface1d, dataRange.end() - 1, closeBracketDir);
             }
             // draw opening bracket:
             QTransform oldTransform = painter->transform();
             painter->setPen(mBracketPen);
             painter->setBrush(mBracketBrush);
             painter->translate(openBracketPos);
             painter->rotate(openBracketAngle / M_PI * 180.0);
             drawBracket(painter, openBracketDir);
             painter->setTransform(oldTransform);
             // draw closing bracket:
             painter->setPen(mBracketPen);
             painter->setBrush(mBracketBrush);
             painter->translate(closeBracketPos);
             painter->rotate(closeBracketAngle / M_PI * 180.0);
             drawBracket(painter, closeBracketDir);
             painter->setTransform(oldTransform);
         }
     }
 }
 
 /*! \internal
 
   If \ref setTangentToData is enabled, brackets need to be rotated according to the data slope.
   This method returns the angle in radians by which a bracket at the given \a dataIndex must be
   rotated.
 
   The parameter \a direction must be set to either -1 or 1, representing whether it is an opening
   or closing bracket. Since for slope calculation multiple data points are required, this defines
   the direction in which the algorithm walks, starting at \a dataIndex, to average those data
   points. (see \ref setTangentToData and \ref setTangentAverage)
 
   \a interface1d is the interface to the plottable's data which is used to query data coordinates.
 */
 double QCPSelectionDecoratorBracket::getTangentAngle(const QCPPlottableInterface1D *interface1d, int dataIndex,
                                                      int direction) const
 {
     if (!interface1d || dataIndex < 0 || dataIndex >= interface1d->dataCount())
         return 0;
     direction = direction < 0 ? -1 : 1; // enforce direction is either -1 or 1
 
     // how many steps we can actually go from index in the given direction without exceeding data bounds:
     int averageCount;
     if (direction < 0)
         averageCount = qMin(mTangentAverage, dataIndex);
     else
         averageCount = qMin(mTangentAverage, interface1d->dataCount() - 1 - dataIndex);
     qDebug() << averageCount;
     // calculate point average of averageCount points:
     QVector<QPointF> points(averageCount);
     QPointF pointsAverage;
     int currentIndex = dataIndex;
     for (int i = 0; i < averageCount; ++i)
     {
         points[i] = getPixelCoordinates(interface1d, currentIndex);
         pointsAverage += points[i];
         currentIndex += direction;
     }
     pointsAverage /= (double)averageCount;
 
     // calculate slope of linear regression through points:
     double numSum   = 0;
     double denomSum = 0;
     for (int i = 0; i < averageCount; ++i)
     {
         const double dx = points.at(i).x() - pointsAverage.x();
         const double dy = points.at(i).y() - pointsAverage.y();
         numSum += dx * dy;
         denomSum += dx * dx;
     }
     if (!qFuzzyIsNull(denomSum) && !qFuzzyIsNull(numSum))
     {
         return qAtan2(numSum, denomSum);
     }
     else // undetermined angle, probably mTangentAverage == 1, so using only one data point
         return 0;
 }
 
 /*! \internal
 
   Returns the pixel coordinates of the data point at \a dataIndex, using \a interface1d to access
   the data points.
 */
 QPointF QCPSelectionDecoratorBracket::getPixelCoordinates(const QCPPlottableInterface1D *interface1d,
                                                           int dataIndex) const
 {
     QCPAxis *keyAxis   = mPlottable->keyAxis();
     QCPAxis *valueAxis = mPlottable->valueAxis();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return QPointF(0, 0);
     }
 
     if (keyAxis->orientation() == Qt::Horizontal)
         return QPointF(keyAxis->coordToPixel(interface1d->dataMainKey(dataIndex)),
                        valueAxis->coordToPixel(interface1d->dataMainValue(dataIndex)));
     else
         return QPointF(valueAxis->coordToPixel(interface1d->dataMainValue(dataIndex)),
                        keyAxis->coordToPixel(interface1d->dataMainKey(dataIndex)));
 }
 /* end of 'src/selectiondecorator-bracket.cpp' */
 
 /* including file 'src/layoutelements/layoutelement-axisrect.cpp', size 47509 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200  */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAxisRect
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAxisRect
   \brief Holds multiple axes and arranges them in a rectangular shape.
 
   This class represents an axis rect, a rectangular area that is bounded on all sides with an
   arbitrary number of axes.
 
   Initially QCustomPlot has one axis rect, accessible via QCustomPlot::axisRect(). However, the
   layout system allows to have multiple axis rects, e.g. arranged in a grid layout
   (QCustomPlot::plotLayout).
 
   By default, QCPAxisRect comes with four axes, at bottom, top, left and right. They can be
   accessed via \ref axis by providing the respective axis type (\ref QCPAxis::AxisType) and index.
   If you need all axes in the axis rect, use \ref axes. The top and right axes are set to be
   invisible initially (QCPAxis::setVisible). To add more axes to a side, use \ref addAxis or \ref
   addAxes. To remove an axis, use \ref removeAxis.
 
   The axis rect layerable itself only draws a background pixmap or color, if specified (\ref
   setBackground). It is placed on the "background" layer initially (see \ref QCPLayer for an
   explanation of the QCustomPlot layer system). The axes that are held by the axis rect can be
   placed on other layers, independently of the axis rect.
 
   Every axis rect has a child layout of type \ref QCPLayoutInset. It is accessible via \ref
   insetLayout and can be used to have other layout elements (or even other layouts with multiple
   elements) hovering inside the axis rect.
 
   If an axis rect is clicked and dragged, it processes this by moving certain axis ranges. The
   behaviour can be controlled with \ref setRangeDrag and \ref setRangeDragAxes. If the mouse wheel
   is scrolled while the cursor is on the axis rect, certain axes are scaled. This is controllable
   via \ref setRangeZoom, \ref setRangeZoomAxes and \ref setRangeZoomFactor. These interactions are
   only enabled if \ref QCustomPlot::setInteractions contains \ref QCP::iRangeDrag and \ref
   QCP::iRangeZoom.
 
   \image html AxisRectSpacingOverview.png
   <center>Overview of the spacings and paddings that define the geometry of an axis. The dashed
   line on the far left indicates the viewport/widget border.</center>
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QCPLayoutInset *QCPAxisRect::insetLayout() const
 
   Returns the inset layout of this axis rect. It can be used to place other layout elements (or
   even layouts with multiple other elements) inside/on top of an axis rect.
 
   \see QCPLayoutInset
 */
 
 /*! \fn int QCPAxisRect::left() const
 
   Returns the pixel position of the left border of this axis rect. Margins are not taken into
   account here, so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn int QCPAxisRect::right() const
 
   Returns the pixel position of the right border of this axis rect. Margins are not taken into
   account here, so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn int QCPAxisRect::top() const
 
   Returns the pixel position of the top border of this axis rect. Margins are not taken into
   account here, so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn int QCPAxisRect::bottom() const
 
   Returns the pixel position of the bottom border of this axis rect. Margins are not taken into
   account here, so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn int QCPAxisRect::width() const
 
   Returns the pixel width of this axis rect. Margins are not taken into account here, so the
   returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn int QCPAxisRect::height() const
 
   Returns the pixel height of this axis rect. Margins are not taken into account here, so the
   returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn QSize QCPAxisRect::size() const
 
   Returns the pixel size of this axis rect. Margins are not taken into account here, so the
   returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn QPoint QCPAxisRect::topLeft() const
 
   Returns the top left corner of this axis rect in pixels. Margins are not taken into account here,
   so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn QPoint QCPAxisRect::topRight() const
 
   Returns the top right corner of this axis rect in pixels. Margins are not taken into account
   here, so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn QPoint QCPAxisRect::bottomLeft() const
 
   Returns the bottom left corner of this axis rect in pixels. Margins are not taken into account
   here, so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn QPoint QCPAxisRect::bottomRight() const
 
   Returns the bottom right corner of this axis rect in pixels. Margins are not taken into account
   here, so the returned value is with respect to the inner \ref rect.
 */
 
 /*! \fn QPoint QCPAxisRect::center() const
 
   Returns the center of this axis rect in pixels. Margins are not taken into account here, so the
   returned value is with respect to the inner \ref rect.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Creates a QCPAxisRect instance and sets default values. An axis is added for each of the four
   sides, the top and right axes are set invisible initially.
 */
 QCPAxisRect::QCPAxisRect(QCustomPlot *parentPlot, bool setupDefaultAxes)
     : QCPLayoutElement(parentPlot), mBackgroundBrush(Qt::NoBrush), mBackgroundScaled(true),
       mBackgroundScaledMode(Qt::KeepAspectRatioByExpanding), mInsetLayout(new QCPLayoutInset),
       mRangeDrag(Qt::Horizontal | Qt::Vertical), mRangeZoom(Qt::Horizontal | Qt::Vertical), mRangeZoomFactorHorz(0.85),
       mRangeZoomFactorVert(0.85), mDragging(false)
 {
     mInsetLayout->initializeParentPlot(mParentPlot);
     mInsetLayout->setParentLayerable(this);
     mInsetLayout->setParent(this);
 
     setMinimumSize(50, 50);
     setMinimumMargins(QMargins(15, 15, 15, 15));
     mAxes.insert(QCPAxis::atLeft, QList<QCPAxis *>());
     mAxes.insert(QCPAxis::atRight, QList<QCPAxis *>());
     mAxes.insert(QCPAxis::atTop, QList<QCPAxis *>());
     mAxes.insert(QCPAxis::atBottom, QList<QCPAxis *>());
 
     if (setupDefaultAxes)
     {
         QCPAxis *xAxis  = addAxis(QCPAxis::atBottom);
         QCPAxis *yAxis  = addAxis(QCPAxis::atLeft);
         QCPAxis *xAxis2 = addAxis(QCPAxis::atTop);
         QCPAxis *yAxis2 = addAxis(QCPAxis::atRight);
         setRangeDragAxes(xAxis, yAxis);
         setRangeZoomAxes(xAxis, yAxis);
         xAxis2->setVisible(false);
         yAxis2->setVisible(false);
         xAxis->grid()->setVisible(true);
         yAxis->grid()->setVisible(true);
         xAxis2->grid()->setVisible(false);
         yAxis2->grid()->setVisible(false);
         xAxis2->grid()->setZeroLinePen(Qt::NoPen);
         yAxis2->grid()->setZeroLinePen(Qt::NoPen);
         xAxis2->grid()->setVisible(false);
         yAxis2->grid()->setVisible(false);
     }
 }
 
 QCPAxisRect::~QCPAxisRect()
 {
     delete mInsetLayout;
-    mInsetLayout = 0;
+    mInsetLayout = nullptr;
 
     QList<QCPAxis *> axesList = axes();
     for (int i = 0; i < axesList.size(); ++i)
         removeAxis(axesList.at(i));
 }
 
 /*!
   Returns the number of axes on the axis rect side specified with \a type.
 
   \see axis
 */
 int QCPAxisRect::axisCount(QCPAxis::AxisType type) const
 {
     return mAxes.value(type).size();
 }
 
 /*!
   Returns the axis with the given \a index on the axis rect side specified with \a type.
 
   \see axisCount, axes
 */
 QCPAxis *QCPAxisRect::axis(QCPAxis::AxisType type, int index) const
 {
     QList<QCPAxis *> ax(mAxes.value(type));
     if (index >= 0 && index < ax.size())
     {
         return ax.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Axis index out of bounds:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*!
   Returns all axes on the axis rect sides specified with \a types.
 
   \a types may be a single \ref QCPAxis::AxisType or an <tt>or</tt>-combination, to get the axes of
   multiple sides.
 
   \see axis
 */
 QList<QCPAxis *> QCPAxisRect::axes(QCPAxis::AxisTypes types) const
 {
     QList<QCPAxis *> result;
     if (types.testFlag(QCPAxis::atLeft))
         result << mAxes.value(QCPAxis::atLeft);
     if (types.testFlag(QCPAxis::atRight))
         result << mAxes.value(QCPAxis::atRight);
     if (types.testFlag(QCPAxis::atTop))
         result << mAxes.value(QCPAxis::atTop);
     if (types.testFlag(QCPAxis::atBottom))
         result << mAxes.value(QCPAxis::atBottom);
     return result;
 }
 
 /*! \overload
 
   Returns all axes of this axis rect.
 */
 QList<QCPAxis *> QCPAxisRect::axes() const
 {
     QList<QCPAxis *> result;
     QHashIterator<QCPAxis::AxisType, QList<QCPAxis *>> it(mAxes);
     while (it.hasNext())
     {
         it.next();
         result << it.value();
     }
     return result;
 }
 
 /*!
   Adds a new axis to the axis rect side specified with \a type, and returns it. If \a axis is 0, a
   new QCPAxis instance is created internally. QCustomPlot owns the returned axis, so if you want to
   remove an axis, use \ref removeAxis instead of deleting it manually.
 
   You may inject QCPAxis instances (or sublasses of QCPAxis) by setting \a axis to an axis that was
   previously created outside QCustomPlot. It is important to note that QCustomPlot takes ownership
   of the axis, so you may not delete it afterwards. Further, the \a axis must have been created
   with this axis rect as parent and with the same axis type as specified in \a type. If this is not
   the case, a debug output is generated, the axis is not added, and the method returns 0.
 
   This method can not be used to move \a axis between axis rects. The same \a axis instance must
   not be added multiple times to the same or different axis rects.
 
   If an axis rect side already contains one or more axes, the lower and upper endings of the new
   axis (\ref QCPAxis::setLowerEnding, \ref QCPAxis::setUpperEnding) are set to \ref
   QCPLineEnding::esHalfBar.
 
   \see addAxes, setupFullAxesBox
 */
 QCPAxis *QCPAxisRect::addAxis(QCPAxis::AxisType type, QCPAxis *axis)
 {
     QCPAxis *newAxis = axis;
     if (!newAxis)
     {
         newAxis = new QCPAxis(this, type);
     }
     else // user provided existing axis instance, do some sanity checks
     {
         if (newAxis->axisType() != type)
         {
             qDebug() << Q_FUNC_INFO << "passed axis has different axis type than specified in type parameter";
-            return 0;
+            return nullptr;
         }
         if (newAxis->axisRect() != this)
         {
             qDebug() << Q_FUNC_INFO << "passed axis doesn't have this axis rect as parent axis rect";
-            return 0;
+            return nullptr;
         }
         if (axes().contains(newAxis))
         {
             qDebug() << Q_FUNC_INFO << "passed axis is already owned by this axis rect";
-            return 0;
+            return nullptr;
         }
     }
     if (mAxes[type].size() > 0) // multiple axes on one side, add half-bar axis ending to additional axes with offset
     {
         bool invert = (type == QCPAxis::atRight) || (type == QCPAxis::atBottom);
         newAxis->setLowerEnding(QCPLineEnding(QCPLineEnding::esHalfBar, 6, 10, !invert));
         newAxis->setUpperEnding(QCPLineEnding(QCPLineEnding::esHalfBar, 6, 10, invert));
     }
     mAxes[type].append(newAxis);
 
     // reset convenience axis pointers on parent QCustomPlot if they are unset:
     if (mParentPlot && mParentPlot->axisRectCount() > 0 && mParentPlot->axisRect(0) == this)
     {
         switch (type)
         {
             case QCPAxis::atBottom:
             {
                 if (!mParentPlot->xAxis)
                     mParentPlot->xAxis = newAxis;
                 break;
             }
             case QCPAxis::atLeft:
             {
                 if (!mParentPlot->yAxis)
                     mParentPlot->yAxis = newAxis;
                 break;
             }
             case QCPAxis::atTop:
             {
                 if (!mParentPlot->xAxis2)
                     mParentPlot->xAxis2 = newAxis;
                 break;
             }
             case QCPAxis::atRight:
             {
                 if (!mParentPlot->yAxis2)
                     mParentPlot->yAxis2 = newAxis;
                 break;
             }
         }
     }
 
     return newAxis;
 }
 
 /*!
   Adds a new axis with \ref addAxis to each axis rect side specified in \a types. This may be an
   <tt>or</tt>-combination of QCPAxis::AxisType, so axes can be added to multiple sides at once.
 
   Returns a list of the added axes.
 
   \see addAxis, setupFullAxesBox
 */
 QList<QCPAxis *> QCPAxisRect::addAxes(QCPAxis::AxisTypes types)
 {
     QList<QCPAxis *> result;
     if (types.testFlag(QCPAxis::atLeft))
         result << addAxis(QCPAxis::atLeft);
     if (types.testFlag(QCPAxis::atRight))
         result << addAxis(QCPAxis::atRight);
     if (types.testFlag(QCPAxis::atTop))
         result << addAxis(QCPAxis::atTop);
     if (types.testFlag(QCPAxis::atBottom))
         result << addAxis(QCPAxis::atBottom);
     return result;
 }
 
 /*!
   Removes the specified \a axis from the axis rect and deletes it.
 
   Returns true on success, i.e. if \a axis was a valid axis in this axis rect.
 
   \see addAxis
 */
 bool QCPAxisRect::removeAxis(QCPAxis *axis)
 {
     // don't access axis->axisType() to provide safety when axis is an invalid pointer, rather go through all axis containers:
     QHashIterator<QCPAxis::AxisType, QList<QCPAxis *>> it(mAxes);
     while (it.hasNext())
     {
         it.next();
         if (it.value().contains(axis))
         {
             mAxes[it.key()].removeOne(axis);
             if (qobject_cast<QCustomPlot *>(
                     parentPlot())) // make sure this isn't called from QObject dtor when QCustomPlot is already destructed (happens when the axis rect is not in any layout and thus QObject-child of QCustomPlot)
                 parentPlot()->axisRemoved(axis);
             delete axis;
             return true;
         }
     }
     qDebug() << Q_FUNC_INFO << "Axis isn't in axis rect:" << reinterpret_cast<quintptr>(axis);
     return false;
 }
 
 /*!
   Zooms in (or out) to the passed rectangular region \a pixelRect, given in pixel coordinates.
 
   All axes of this axis rect will have their range zoomed accordingly. If you only wish to zoom
   specific axes, use the overloaded version of this method.
 
   \see QCustomPlot::setSelectionRectMode
 */
 void QCPAxisRect::zoom(const QRectF &pixelRect)
 {
     zoom(pixelRect, axes());
 }
 
 /*! \overload
 
   Zooms in (or out) to the passed rectangular region \a pixelRect, given in pixel coordinates.
 
   Only the axes passed in \a affectedAxes will have their ranges zoomed accordingly.
 
   \see QCustomPlot::setSelectionRectMode
 */
 void QCPAxisRect::zoom(const QRectF &pixelRect, const QList<QCPAxis *> &affectedAxes)
 {
     foreach (QCPAxis *axis, affectedAxes)
     {
         if (!axis)
         {
             qDebug() << Q_FUNC_INFO << "a passed axis was zero";
             continue;
         }
         QCPRange pixelRange;
         if (axis->orientation() == Qt::Horizontal)
             pixelRange = QCPRange(pixelRect.left(), pixelRect.right());
         else
             pixelRange = QCPRange(pixelRect.top(), pixelRect.bottom());
         axis->setRange(axis->pixelToCoord(pixelRange.lower), axis->pixelToCoord(pixelRange.upper));
     }
 }
 
 /*!
   Convenience function to create an axis on each side that doesn't have any axes yet and set their
   visibility to true. Further, the top/right axes are assigned the following properties of the
   bottom/left axes:
 
   \li range (\ref QCPAxis::setRange)
   \li range reversed (\ref QCPAxis::setRangeReversed)
   \li scale type (\ref QCPAxis::setScaleType)
   \li tick visibility (\ref QCPAxis::setTicks)
   \li number format (\ref QCPAxis::setNumberFormat)
   \li number precision (\ref QCPAxis::setNumberPrecision)
   \li tick count of ticker (\ref QCPAxisTicker::setTickCount)
   \li tick origin of ticker (\ref QCPAxisTicker::setTickOrigin)
 
   Tick label visibility (\ref QCPAxis::setTickLabels) of the right and top axes are set to false.
 
   If \a connectRanges is true, the \ref QCPAxis::rangeChanged "rangeChanged" signals of the bottom
   and left axes are connected to the \ref QCPAxis::setRange slots of the top and right axes.
 */
 void QCPAxisRect::setupFullAxesBox(bool connectRanges)
 {
     QCPAxis *xAxis, *yAxis, *xAxis2, *yAxis2;
     if (axisCount(QCPAxis::atBottom) == 0)
         xAxis = addAxis(QCPAxis::atBottom);
     else
         xAxis = axis(QCPAxis::atBottom);
 
     if (axisCount(QCPAxis::atLeft) == 0)
         yAxis = addAxis(QCPAxis::atLeft);
     else
         yAxis = axis(QCPAxis::atLeft);
 
     if (axisCount(QCPAxis::atTop) == 0)
         xAxis2 = addAxis(QCPAxis::atTop);
     else
         xAxis2 = axis(QCPAxis::atTop);
 
     if (axisCount(QCPAxis::atRight) == 0)
         yAxis2 = addAxis(QCPAxis::atRight);
     else
         yAxis2 = axis(QCPAxis::atRight);
 
     xAxis->setVisible(true);
     yAxis->setVisible(true);
     xAxis2->setVisible(true);
     yAxis2->setVisible(true);
     xAxis2->setTickLabels(false);
     yAxis2->setTickLabels(false);
 
     xAxis2->setRange(xAxis->range());
     xAxis2->setRangeReversed(xAxis->rangeReversed());
     xAxis2->setScaleType(xAxis->scaleType());
     xAxis2->setTicks(xAxis->ticks());
     xAxis2->setNumberFormat(xAxis->numberFormat());
     xAxis2->setNumberPrecision(xAxis->numberPrecision());
     xAxis2->ticker()->setTickCount(xAxis->ticker()->tickCount());
     xAxis2->ticker()->setTickOrigin(xAxis->ticker()->tickOrigin());
 
     yAxis2->setRange(yAxis->range());
     yAxis2->setRangeReversed(yAxis->rangeReversed());
     yAxis2->setScaleType(yAxis->scaleType());
     yAxis2->setTicks(yAxis->ticks());
     yAxis2->setNumberFormat(yAxis->numberFormat());
     yAxis2->setNumberPrecision(yAxis->numberPrecision());
     yAxis2->ticker()->setTickCount(yAxis->ticker()->tickCount());
     yAxis2->ticker()->setTickOrigin(yAxis->ticker()->tickOrigin());
 
     if (connectRanges)
     {
         connect(xAxis, SIGNAL(rangeChanged(QCPRange)), xAxis2, SLOT(setRange(QCPRange)));
         connect(yAxis, SIGNAL(rangeChanged(QCPRange)), yAxis2, SLOT(setRange(QCPRange)));
     }
 }
 
 /*!
   Returns a list of all the plottables that are associated with this axis rect.
 
   A plottable is considered associated with an axis rect if its key or value axis (or both) is in
   this axis rect.
 
   \see graphs, items
 */
 QList<QCPAbstractPlottable *> QCPAxisRect::plottables() const
 {
     // Note: don't append all QCPAxis::plottables() into a list, because we might get duplicate entries
     QList<QCPAbstractPlottable *> result;
     for (int i = 0; i < mParentPlot->mPlottables.size(); ++i)
     {
         if (mParentPlot->mPlottables.at(i)->keyAxis()->axisRect() == this ||
             mParentPlot->mPlottables.at(i)->valueAxis()->axisRect() == this)
             result.append(mParentPlot->mPlottables.at(i));
     }
     return result;
 }
 
 /*!
   Returns a list of all the graphs that are associated with this axis rect.
 
   A graph is considered associated with an axis rect if its key or value axis (or both) is in
   this axis rect.
 
   \see plottables, items
 */
 QList<QCPGraph *> QCPAxisRect::graphs() const
 {
     // Note: don't append all QCPAxis::graphs() into a list, because we might get duplicate entries
     QList<QCPGraph *> result;
     for (int i = 0; i < mParentPlot->mGraphs.size(); ++i)
     {
         if (mParentPlot->mGraphs.at(i)->keyAxis()->axisRect() == this ||
             mParentPlot->mGraphs.at(i)->valueAxis()->axisRect() == this)
             result.append(mParentPlot->mGraphs.at(i));
     }
     return result;
 }
 
 /*!
   Returns a list of all the items that are associated with this axis rect.
 
   An item is considered associated with an axis rect if any of its positions has key or value axis
   set to an axis that is in this axis rect, or if any of its positions has \ref
   QCPItemPosition::setAxisRect set to the axis rect, or if the clip axis rect (\ref
   QCPAbstractItem::setClipAxisRect) is set to this axis rect.
 
   \see plottables, graphs
 */
 QList<QCPAbstractItem *> QCPAxisRect::items() const
 {
     // Note: don't just append all QCPAxis::items() into a list, because we might get duplicate entries
     //       and miss those items that have this axis rect as clipAxisRect.
     QList<QCPAbstractItem *> result;
     for (int itemId = 0; itemId < mParentPlot->mItems.size(); ++itemId)
     {
         if (mParentPlot->mItems.at(itemId)->clipAxisRect() == this)
         {
             result.append(mParentPlot->mItems.at(itemId));
             continue;
         }
         QList<QCPItemPosition *> positions = mParentPlot->mItems.at(itemId)->positions();
         for (int posId = 0; posId < positions.size(); ++posId)
         {
             if (positions.at(posId)->axisRect() == this || positions.at(posId)->keyAxis()->axisRect() == this ||
                 positions.at(posId)->valueAxis()->axisRect() == this)
             {
                 result.append(mParentPlot->mItems.at(itemId));
                 break;
             }
         }
     }
     return result;
 }
 
 /*!
   This method is called automatically upon replot and doesn't need to be called by users of
   QCPAxisRect.
 
   Calls the base class implementation to update the margins (see \ref QCPLayoutElement::update),
   and finally passes the \ref rect to the inset layout (\ref insetLayout) and calls its
   QCPInsetLayout::update function.
 
   \seebaseclassmethod
 */
 void QCPAxisRect::update(UpdatePhase phase)
 {
     QCPLayoutElement::update(phase);
 
     switch (phase)
     {
         case upPreparation:
         {
             QList<QCPAxis *> allAxes = axes();
             for (int i = 0; i < allAxes.size(); ++i)
                 allAxes.at(i)->setupTickVectors();
             break;
         }
         case upLayout:
         {
             mInsetLayout->setOuterRect(rect());
             break;
         }
         default:
             break;
     }
 
     // pass update call on to inset layout (doesn't happen automatically, because QCPAxisRect doesn't derive from QCPLayout):
     mInsetLayout->update(phase);
 }
 
 /* inherits documentation from base class */
 QList<QCPLayoutElement *> QCPAxisRect::elements(bool recursive) const
 {
     QList<QCPLayoutElement *> result;
     if (mInsetLayout)
     {
         result << mInsetLayout;
         if (recursive)
             result << mInsetLayout->elements(recursive);
     }
     return result;
 }
 
 /* inherits documentation from base class */
 void QCPAxisRect::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     painter->setAntialiasing(false);
 }
 
 /* inherits documentation from base class */
 void QCPAxisRect::draw(QCPPainter *painter)
 {
     drawBackground(painter);
 }
 
 /*!
   Sets \a pm as the axis background pixmap. The axis background pixmap will be drawn inside the
   axis rect. Since axis rects place themselves on the "background" layer by default, the axis rect
   backgrounds are usually drawn below everything else.
 
   For cases where the provided pixmap doesn't have the same size as the axis rect, scaling can be
   enabled with \ref setBackgroundScaled and the scaling mode (i.e. whether and how the aspect ratio
   is preserved) can be set with \ref setBackgroundScaledMode. To set all these options in one call,
   consider using the overloaded version of this function.
 
   Below the pixmap, the axis rect may be optionally filled with a brush, if specified with \ref
   setBackground(const QBrush &brush).
 
   \see setBackgroundScaled, setBackgroundScaledMode, setBackground(const QBrush &brush)
 */
 void QCPAxisRect::setBackground(const QPixmap &pm)
 {
     mBackgroundPixmap       = pm;
     mScaledBackgroundPixmap = QPixmap();
 }
 
 /*! \overload
 
   Sets \a brush as the background brush. The axis rect background will be filled with this brush.
   Since axis rects place themselves on the "background" layer by default, the axis rect backgrounds
   are usually drawn below everything else.
 
   The brush will be drawn before (under) any background pixmap, which may be specified with \ref
   setBackground(const QPixmap &pm).
 
   To disable drawing of a background brush, set \a brush to Qt::NoBrush.
 
   \see setBackground(const QPixmap &pm)
 */
 void QCPAxisRect::setBackground(const QBrush &brush)
 {
     mBackgroundBrush = brush;
 }
 
 /*! \overload
 
   Allows setting the background pixmap of the axis rect, whether it shall be scaled and how it
   shall be scaled in one call.
 
   \see setBackground(const QPixmap &pm), setBackgroundScaled, setBackgroundScaledMode
 */
 void QCPAxisRect::setBackground(const QPixmap &pm, bool scaled, Qt::AspectRatioMode mode)
 {
     mBackgroundPixmap       = pm;
     mScaledBackgroundPixmap = QPixmap();
     mBackgroundScaled       = scaled;
     mBackgroundScaledMode   = mode;
 }
 
 /*!
   Sets whether the axis background pixmap shall be scaled to fit the axis rect or not. If \a scaled
   is set to true, you may control whether and how the aspect ratio of the original pixmap is
   preserved with \ref setBackgroundScaledMode.
 
   Note that the scaled version of the original pixmap is buffered, so there is no performance
   penalty on replots. (Except when the axis rect dimensions are changed continuously.)
 
   \see setBackground, setBackgroundScaledMode
 */
 void QCPAxisRect::setBackgroundScaled(bool scaled)
 {
     mBackgroundScaled = scaled;
 }
 
 /*!
   If scaling of the axis background pixmap is enabled (\ref setBackgroundScaled), use this function to
   define whether and how the aspect ratio of the original pixmap passed to \ref setBackground is preserved.
   \see setBackground, setBackgroundScaled
 */
 void QCPAxisRect::setBackgroundScaledMode(Qt::AspectRatioMode mode)
 {
     mBackgroundScaledMode = mode;
 }
 
 /*!
   Returns the range drag axis of the \a orientation provided. If multiple axes were set, returns
   the first one (use \ref rangeDragAxes to retrieve a list with all set axes).
 
   \see setRangeDragAxes
 */
 QCPAxis *QCPAxisRect::rangeDragAxis(Qt::Orientation orientation)
 {
     if (orientation == Qt::Horizontal)
-        return mRangeDragHorzAxis.isEmpty() ? 0 : mRangeDragHorzAxis.first().data();
+        return mRangeDragHorzAxis.isEmpty() ? nullptr : mRangeDragHorzAxis.first().data();
     else
-        return mRangeDragVertAxis.isEmpty() ? 0 : mRangeDragVertAxis.first().data();
+        return mRangeDragVertAxis.isEmpty() ? nullptr : mRangeDragVertAxis.first().data();
 }
 
 /*!
   Returns the range zoom axis of the \a orientation provided. If multiple axes were set, returns
   the first one (use \ref rangeZoomAxes to retrieve a list with all set axes).
 
   \see setRangeZoomAxes
 */
 QCPAxis *QCPAxisRect::rangeZoomAxis(Qt::Orientation orientation)
 {
     if (orientation == Qt::Horizontal)
-        return mRangeZoomHorzAxis.isEmpty() ? 0 : mRangeZoomHorzAxis.first().data();
+        return mRangeZoomHorzAxis.isEmpty() ? nullptr : mRangeZoomHorzAxis.first().data();
     else
-        return mRangeZoomVertAxis.isEmpty() ? 0 : mRangeZoomVertAxis.first().data();
+        return mRangeZoomVertAxis.isEmpty() ? nullptr : mRangeZoomVertAxis.first().data();
 }
 
 /*!
   Returns all range drag axes of the \a orientation provided.
 
   \see rangeZoomAxis, setRangeZoomAxes
 */
 QList<QCPAxis *> QCPAxisRect::rangeDragAxes(Qt::Orientation orientation)
 {
     QList<QCPAxis *> result;
     if (orientation == Qt::Horizontal)
     {
         for (int i = 0; i < mRangeDragHorzAxis.size(); ++i)
         {
             if (!mRangeDragHorzAxis.at(i).isNull())
                 result.append(mRangeDragHorzAxis.at(i).data());
         }
     }
     else
     {
         for (int i = 0; i < mRangeDragVertAxis.size(); ++i)
         {
             if (!mRangeDragVertAxis.at(i).isNull())
                 result.append(mRangeDragVertAxis.at(i).data());
         }
     }
     return result;
 }
 
 /*!
   Returns all range zoom axes of the \a orientation provided.
 
   \see rangeDragAxis, setRangeDragAxes
 */
 QList<QCPAxis *> QCPAxisRect::rangeZoomAxes(Qt::Orientation orientation)
 {
     QList<QCPAxis *> result;
     if (orientation == Qt::Horizontal)
     {
         for (int i = 0; i < mRangeZoomHorzAxis.size(); ++i)
         {
             if (!mRangeZoomHorzAxis.at(i).isNull())
                 result.append(mRangeZoomHorzAxis.at(i).data());
         }
     }
     else
     {
         for (int i = 0; i < mRangeZoomVertAxis.size(); ++i)
         {
             if (!mRangeZoomVertAxis.at(i).isNull())
                 result.append(mRangeZoomVertAxis.at(i).data());
         }
     }
     return result;
 }
 
 /*!
   Returns the range zoom factor of the \a orientation provided.
 
   \see setRangeZoomFactor
 */
 double QCPAxisRect::rangeZoomFactor(Qt::Orientation orientation)
 {
     return (orientation == Qt::Horizontal ? mRangeZoomFactorHorz : mRangeZoomFactorVert);
 }
 
 /*!
   Sets which axis orientation may be range dragged by the user with mouse interaction.
   What orientation corresponds to which specific axis can be set with
   \ref setRangeDragAxes(QCPAxis *horizontal, QCPAxis *vertical). By
   default, the horizontal axis is the bottom axis (xAxis) and the vertical axis
   is the left axis (yAxis).
 
   To disable range dragging entirely, pass 0 as \a orientations or remove \ref QCP::iRangeDrag from \ref
   QCustomPlot::setInteractions. To enable range dragging for both directions, pass <tt>Qt::Horizontal |
   Qt::Vertical</tt> as \a orientations.
 
   In addition to setting \a orientations to a non-zero value, make sure \ref QCustomPlot::setInteractions
   contains \ref QCP::iRangeDrag to enable the range dragging interaction.
 
   \see setRangeZoom, setRangeDragAxes, QCustomPlot::setNoAntialiasingOnDrag
 */
 void QCPAxisRect::setRangeDrag(Qt::Orientations orientations)
 {
     mRangeDrag = orientations;
 }
 
 /*!
   Sets which axis orientation may be zoomed by the user with the mouse wheel. What orientation
   corresponds to which specific axis can be set with \ref setRangeZoomAxes(QCPAxis *horizontal,
   QCPAxis *vertical). By default, the horizontal axis is the bottom axis (xAxis) and the vertical
   axis is the left axis (yAxis).
 
   To disable range zooming entirely, pass 0 as \a orientations or remove \ref QCP::iRangeZoom from \ref
   QCustomPlot::setInteractions. To enable range zooming for both directions, pass <tt>Qt::Horizontal |
   Qt::Vertical</tt> as \a orientations.
 
   In addition to setting \a orientations to a non-zero value, make sure \ref QCustomPlot::setInteractions
   contains \ref QCP::iRangeZoom to enable the range zooming interaction.
 
   \see setRangeZoomFactor, setRangeZoomAxes, setRangeDrag
 */
 void QCPAxisRect::setRangeZoom(Qt::Orientations orientations)
 {
     mRangeZoom = orientations;
 }
 
 /*! \overload
 
   Sets the axes whose range will be dragged when \ref setRangeDrag enables mouse range dragging on
   the QCustomPlot widget. Pass 0 if no axis shall be dragged in the respective orientation.
 
   Use the overload taking a list of axes, if multiple axes (more than one per orientation) shall
   react to dragging interactions.
 
   \see setRangeZoomAxes
 */
 void QCPAxisRect::setRangeDragAxes(QCPAxis *horizontal, QCPAxis *vertical)
 {
     QList<QCPAxis *> horz, vert;
     if (horizontal)
         horz.append(horizontal);
     if (vertical)
         vert.append(vertical);
     setRangeDragAxes(horz, vert);
 }
 
 /*! \overload
 
   This method allows to set up multiple axes to react to horizontal and vertical dragging. The drag
   orientation that the respective axis will react to is deduced from its orientation (\ref
   QCPAxis::orientation).
 
   In the unusual case that you wish to e.g. drag a vertically oriented axis with a horizontal drag
   motion, use the overload taking two separate lists for horizontal and vertical dragging.
 */
 void QCPAxisRect::setRangeDragAxes(QList<QCPAxis *> axes)
 {
     QList<QCPAxis *> horz, vert;
     foreach (QCPAxis *ax, axes)
     {
         if (ax->orientation() == Qt::Horizontal)
             horz.append(ax);
         else
             vert.append(ax);
     }
     setRangeDragAxes(horz, vert);
 }
 
 /*! \overload
 
   This method allows to set multiple axes up to react to horizontal and vertical dragging, and
   define specifically which axis reacts to which drag orientation (irrespective of the axis
   orientation).
 */
 void QCPAxisRect::setRangeDragAxes(QList<QCPAxis *> horizontal, QList<QCPAxis *> vertical)
 {
     mRangeDragHorzAxis.clear();
     foreach (QCPAxis *ax, horizontal)
     {
         QPointer<QCPAxis> axPointer(ax);
         if (!axPointer.isNull())
             mRangeDragHorzAxis.append(axPointer);
         else
             qDebug() << Q_FUNC_INFO << "invalid axis passed in horizontal list:" << reinterpret_cast<quintptr>(ax);
     }
     mRangeDragVertAxis.clear();
     foreach (QCPAxis *ax, vertical)
     {
         QPointer<QCPAxis> axPointer(ax);
         if (!axPointer.isNull())
             mRangeDragVertAxis.append(axPointer);
         else
             qDebug() << Q_FUNC_INFO << "invalid axis passed in vertical list:" << reinterpret_cast<quintptr>(ax);
     }
 }
 
 /*!
   Sets the axes whose range will be zoomed when \ref setRangeZoom enables mouse wheel zooming on
   the QCustomPlot widget. Pass 0 if no axis shall be zoomed in the respective orientation.
 
   The two axes can be zoomed with different strengths, when different factors are passed to \ref
   setRangeZoomFactor(double horizontalFactor, double verticalFactor).
 
   Use the overload taking a list of axes, if multiple axes (more than one per orientation) shall
   react to zooming interactions.
 
   \see setRangeDragAxes
 */
 void QCPAxisRect::setRangeZoomAxes(QCPAxis *horizontal, QCPAxis *vertical)
 {
     QList<QCPAxis *> horz, vert;
     if (horizontal)
         horz.append(horizontal);
     if (vertical)
         vert.append(vertical);
     setRangeZoomAxes(horz, vert);
 }
 
 /*! \overload
 
   This method allows to set up multiple axes to react to horizontal and vertical range zooming. The
   zoom orientation that the respective axis will react to is deduced from its orientation (\ref
   QCPAxis::orientation).
 
   In the unusual case that you wish to e.g. zoom a vertically oriented axis with a horizontal zoom
   interaction, use the overload taking two separate lists for horizontal and vertical zooming.
 */
 void QCPAxisRect::setRangeZoomAxes(QList<QCPAxis *> axes)
 {
     QList<QCPAxis *> horz, vert;
     foreach (QCPAxis *ax, axes)
     {
         if (ax->orientation() == Qt::Horizontal)
             horz.append(ax);
         else
             vert.append(ax);
     }
     setRangeZoomAxes(horz, vert);
 }
 
 /*! \overload
 
   This method allows to set multiple axes up to react to horizontal and vertical zooming, and
   define specifically which axis reacts to which zoom orientation (irrespective of the axis
   orientation).
 */
 void QCPAxisRect::setRangeZoomAxes(QList<QCPAxis *> horizontal, QList<QCPAxis *> vertical)
 {
     mRangeZoomHorzAxis.clear();
     foreach (QCPAxis *ax, horizontal)
     {
         QPointer<QCPAxis> axPointer(ax);
         if (!axPointer.isNull())
             mRangeZoomHorzAxis.append(axPointer);
         else
             qDebug() << Q_FUNC_INFO << "invalid axis passed in horizontal list:" << reinterpret_cast<quintptr>(ax);
     }
     mRangeZoomVertAxis.clear();
     foreach (QCPAxis *ax, vertical)
     {
         QPointer<QCPAxis> axPointer(ax);
         if (!axPointer.isNull())
             mRangeZoomVertAxis.append(axPointer);
         else
             qDebug() << Q_FUNC_INFO << "invalid axis passed in vertical list:" << reinterpret_cast<quintptr>(ax);
     }
 }
 
 /*!
   Sets how strong one rotation step of the mouse wheel zooms, when range zoom was activated with
   \ref setRangeZoom. The two parameters \a horizontalFactor and \a verticalFactor provide a way to
   let the horizontal axis zoom at different rates than the vertical axis. Which axis is horizontal
   and which is vertical, can be set with \ref setRangeZoomAxes.
 
   When the zoom factor is greater than one, scrolling the mouse wheel backwards (towards the user)
   will zoom in (make the currently visible range smaller). For zoom factors smaller than one, the
   same scrolling direction will zoom out.
 */
 void QCPAxisRect::setRangeZoomFactor(double horizontalFactor, double verticalFactor)
 {
     mRangeZoomFactorHorz = horizontalFactor;
     mRangeZoomFactorVert = verticalFactor;
 }
 
 /*! \overload
 
   Sets both the horizontal and vertical zoom \a factor.
 */
 void QCPAxisRect::setRangeZoomFactor(double factor)
 {
     mRangeZoomFactorHorz = factor;
     mRangeZoomFactorVert = factor;
 }
 
 /*! \internal
 
   Draws the background of this axis rect. It may consist of a background fill (a QBrush) and a
   pixmap.
 
   If a brush was given via \ref setBackground(const QBrush &brush), this function first draws an
   according filling inside the axis rect with the provided \a painter.
 
   Then, if a pixmap was provided via \ref setBackground, this function buffers the scaled version
   depending on \ref setBackgroundScaled and \ref setBackgroundScaledMode and then draws it inside
   the axis rect with the provided \a painter. The scaled version is buffered in
   mScaledBackgroundPixmap to prevent expensive rescaling at every redraw. It is only updated, when
   the axis rect has changed in a way that requires a rescale of the background pixmap (this is
   dependent on the \ref setBackgroundScaledMode), or when a differend axis background pixmap was
   set.
 
   \see setBackground, setBackgroundScaled, setBackgroundScaledMode
 */
 void QCPAxisRect::drawBackground(QCPPainter *painter)
 {
     // draw background fill:
     if (mBackgroundBrush != Qt::NoBrush)
         painter->fillRect(mRect, mBackgroundBrush);
 
     // draw background pixmap (on top of fill, if brush specified):
     if (!mBackgroundPixmap.isNull())
     {
         if (mBackgroundScaled)
         {
             // check whether mScaledBackground needs to be updated:
             QSize scaledSize(mBackgroundPixmap.size());
             scaledSize.scale(mRect.size(), mBackgroundScaledMode);
             if (mScaledBackgroundPixmap.size() != scaledSize)
                 mScaledBackgroundPixmap =
                     mBackgroundPixmap.scaled(mRect.size(), mBackgroundScaledMode, Qt::SmoothTransformation);
             painter->drawPixmap(mRect.topLeft() + QPoint(0, -1), mScaledBackgroundPixmap,
                                 QRect(0, 0, mRect.width(), mRect.height()) & mScaledBackgroundPixmap.rect());
         }
         else
         {
             painter->drawPixmap(mRect.topLeft() + QPoint(0, -1), mBackgroundPixmap,
                                 QRect(0, 0, mRect.width(), mRect.height()));
         }
     }
 }
 
 /*! \internal
 
   This function makes sure multiple axes on the side specified with \a type don't collide, but are
   distributed according to their respective space requirement (QCPAxis::calculateMargin).
 
   It does this by setting an appropriate offset (\ref QCPAxis::setOffset) on all axes except the
   one with index zero.
 
   This function is called by \ref calculateAutoMargin.
 */
 void QCPAxisRect::updateAxesOffset(QCPAxis::AxisType type)
 {
     const QList<QCPAxis *> axesList = mAxes.value(type);
     if (axesList.isEmpty())
         return;
 
     bool isFirstVisible =
         !axesList.first()
              ->visible(); // if the first axis is visible, the second axis (which is where the loop starts) isn't the first visible axis, so initialize with false
     for (int i = 1; i < axesList.size(); ++i)
     {
         int offset = axesList.at(i - 1)->offset() + axesList.at(i - 1)->calculateMargin();
         if (axesList.at(i)
                 ->visible()) // only add inner tick length to offset if this axis is visible and it's not the first visible one (might happen if true first axis is invisible)
         {
             if (!isFirstVisible)
                 offset += axesList.at(i)->tickLengthIn();
             isFirstVisible = false;
         }
         axesList.at(i)->setOffset(offset);
     }
 }
 
 /* inherits documentation from base class */
 int QCPAxisRect::calculateAutoMargin(QCP::MarginSide side)
 {
     if (!mAutoMargins.testFlag(side))
         qDebug() << Q_FUNC_INFO << "Called with side that isn't specified as auto margin";
 
     updateAxesOffset(QCPAxis::marginSideToAxisType(side));
 
     // note: only need to look at the last (outer most) axis to determine the total margin, due to updateAxisOffset call
     const QList<QCPAxis *> axesList = mAxes.value(QCPAxis::marginSideToAxisType(side));
     if (axesList.size() > 0)
         return axesList.last()->offset() + axesList.last()->calculateMargin();
     else
         return 0;
 }
 
 /*! \internal
 
   Reacts to a change in layout to potentially set the convenience axis pointers \ref
   QCustomPlot::xAxis, \ref QCustomPlot::yAxis, etc. of the parent QCustomPlot to the respective
   axes of this axis rect. This is only done if the respective convenience pointer is currently zero
   and if there is no QCPAxisRect at position (0, 0) of the plot layout.
 
   This automation makes it simpler to replace the main axis rect with a newly created one, without
   the need to manually reset the convenience pointers.
 */
 void QCPAxisRect::layoutChanged()
 {
     if (mParentPlot && mParentPlot->axisRectCount() > 0 && mParentPlot->axisRect(0) == this)
     {
         if (axisCount(QCPAxis::atBottom) > 0 && !mParentPlot->xAxis)
             mParentPlot->xAxis = axis(QCPAxis::atBottom);
         if (axisCount(QCPAxis::atLeft) > 0 && !mParentPlot->yAxis)
             mParentPlot->yAxis = axis(QCPAxis::atLeft);
         if (axisCount(QCPAxis::atTop) > 0 && !mParentPlot->xAxis2)
             mParentPlot->xAxis2 = axis(QCPAxis::atTop);
         if (axisCount(QCPAxis::atRight) > 0 && !mParentPlot->yAxis2)
             mParentPlot->yAxis2 = axis(QCPAxis::atRight);
     }
 }
 
 /*! \internal
 
   Event handler for when a mouse button is pressed on the axis rect. If the left mouse button is
   pressed, the range dragging interaction is initialized (the actual range manipulation happens in
   the \ref mouseMoveEvent).
 
   The mDragging flag is set to true and some anchor points are set that are needed to determine the
   distance the mouse was dragged in the mouse move/release events later.
 
   \see mouseMoveEvent, mouseReleaseEvent
 */
 void QCPAxisRect::mousePressEvent(QMouseEvent *event, const QVariant &details)
 {
     Q_UNUSED(details)
     mDragStart =
         event
             ->pos(); // need this even when not LeftButton is pressed, to determine in releaseEvent whether it was a full click (no position change between press and release)
     if (event->buttons() & Qt::LeftButton)
     {
         mDragging = true;
         // initialize antialiasing backup in case we start dragging:
         if (mParentPlot->noAntialiasingOnDrag())
         {
             mAADragBackup    = mParentPlot->antialiasedElements();
             mNotAADragBackup = mParentPlot->notAntialiasedElements();
         }
         // Mouse range dragging interaction:
         if (mParentPlot->interactions().testFlag(QCP::iRangeDrag))
         {
             mDragStartHorzRange.clear();
             for (int i = 0; i < mRangeDragHorzAxis.size(); ++i)
                 mDragStartHorzRange.append(mRangeDragHorzAxis.at(i).isNull() ? QCPRange() :
                                                                                mRangeDragHorzAxis.at(i)->range());
             mDragStartVertRange.clear();
             for (int i = 0; i < mRangeDragVertAxis.size(); ++i)
                 mDragStartVertRange.append(mRangeDragVertAxis.at(i).isNull() ? QCPRange() :
                                                                                mRangeDragVertAxis.at(i)->range());
         }
     }
 }
 
 /*! \internal
 
   Event handler for when the mouse is moved on the axis rect. If range dragging was activated in a
   preceding \ref mousePressEvent, the range is moved accordingly.
 
   \see mousePressEvent, mouseReleaseEvent
 */
 void QCPAxisRect::mouseMoveEvent(QMouseEvent *event, const QPointF &startPos)
 {
     Q_UNUSED(startPos)
     // Mouse range dragging interaction:
     if (mDragging && mParentPlot->interactions().testFlag(QCP::iRangeDrag))
     {
         if (mRangeDrag.testFlag(Qt::Horizontal))
         {
             for (int i = 0; i < mRangeDragHorzAxis.size(); ++i)
             {
                 QCPAxis *ax = mRangeDragHorzAxis.at(i).data();
                 if (!ax)
                     continue;
                 if (i >= mDragStartHorzRange.size())
                     break;
                 if (ax->mScaleType == QCPAxis::stLinear)
                 {
                     double diff = ax->pixelToCoord(mDragStart.x()) - ax->pixelToCoord(event->pos().x());
                     ax->setRange(mDragStartHorzRange.at(i).lower + diff, mDragStartHorzRange.at(i).upper + diff);
                 }
                 else if (ax->mScaleType == QCPAxis::stLogarithmic)
                 {
                     double diff = ax->pixelToCoord(mDragStart.x()) / ax->pixelToCoord(event->pos().x());
                     ax->setRange(mDragStartHorzRange.at(i).lower * diff, mDragStartHorzRange.at(i).upper * diff);
                 }
             }
         }
 
         if (mRangeDrag.testFlag(Qt::Vertical))
         {
             for (int i = 0; i < mRangeDragVertAxis.size(); ++i)
             {
                 QCPAxis *ax = mRangeDragVertAxis.at(i).data();
                 if (!ax)
                     continue;
                 if (i >= mDragStartVertRange.size())
                     break;
                 if (ax->mScaleType == QCPAxis::stLinear)
                 {
                     double diff = ax->pixelToCoord(mDragStart.y()) - ax->pixelToCoord(event->pos().y());
                     ax->setRange(mDragStartVertRange.at(i).lower + diff, mDragStartVertRange.at(i).upper + diff);
                 }
                 else if (ax->mScaleType == QCPAxis::stLogarithmic)
                 {
                     double diff = ax->pixelToCoord(mDragStart.y()) / ax->pixelToCoord(event->pos().y());
                     ax->setRange(mDragStartVertRange.at(i).lower * diff, mDragStartVertRange.at(i).upper * diff);
                 }
             }
         }
 
         if (mRangeDrag != 0) // if either vertical or horizontal drag was enabled, do a replot
         {
             if (mParentPlot->noAntialiasingOnDrag())
                 mParentPlot->setNotAntialiasedElements(QCP::aeAll);
             mParentPlot->replot();
         }
     }
 }
 
 /* inherits documentation from base class */
 void QCPAxisRect::mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos)
 {
     Q_UNUSED(event)
     Q_UNUSED(startPos)
     mDragging = false;
     if (mParentPlot->noAntialiasingOnDrag())
     {
         mParentPlot->setAntialiasedElements(mAADragBackup);
         mParentPlot->setNotAntialiasedElements(mNotAADragBackup);
     }
 }
 
 /*! \internal
 
   Event handler for mouse wheel events. If rangeZoom is Qt::Horizontal, Qt::Vertical or both, the
   ranges of the axes defined as rangeZoomHorzAxis and rangeZoomVertAxis are scaled. The center of
   the scaling operation is the current cursor position inside the axis rect. The scaling factor is
   dependent on the mouse wheel delta (which direction the wheel was rotated) to provide a natural
   zooming feel. The Strength of the zoom can be controlled via \ref setRangeZoomFactor.
 
   Note, that event->delta() is usually +/-120 for single rotation steps. However, if the mouse
   wheel is turned rapidly, many steps may bunch up to one event, so the event->delta() may then be
   multiples of 120. This is taken into account here, by calculating \a wheelSteps and using it as
   exponent of the range zoom factor. This takes care of the wheel direction automatically, by
   inverting the factor, when the wheel step is negative (f^-1 = 1/f).
 */
 void QCPAxisRect::wheelEvent(QWheelEvent *event)
 {
     // Mouse range zooming interaction:
     if (mParentPlot->interactions().testFlag(QCP::iRangeZoom))
     {
         if (mRangeZoom != 0)
         {
             double factor;
             double wheelSteps = event->delta() / 120.0; // a single step delta is +/-120 usually
             if (mRangeZoom.testFlag(Qt::Horizontal))
             {
                 factor = qPow(mRangeZoomFactorHorz, wheelSteps);
                 for (int i = 0; i < mRangeZoomHorzAxis.size(); ++i)
                 {
                     if (!mRangeZoomHorzAxis.at(i).isNull())
                         mRangeZoomHorzAxis.at(i)->scaleRange(factor,
                                                              mRangeZoomHorzAxis.at(i)->pixelToCoord(event->pos().x()));
                 }
             }
             if (mRangeZoom.testFlag(Qt::Vertical))
             {
                 factor = qPow(mRangeZoomFactorVert, wheelSteps);
                 for (int i = 0; i < mRangeZoomVertAxis.size(); ++i)
                 {
                     if (!mRangeZoomVertAxis.at(i).isNull())
                         mRangeZoomVertAxis.at(i)->scaleRange(factor,
                                                              mRangeZoomVertAxis.at(i)->pixelToCoord(event->pos().y()));
                 }
             }
             mParentPlot->replot();
         }
     }
 }
 /* end of 'src/layoutelements/layoutelement-axisrect.cpp' */
 
 /* including file 'src/layoutelements/layoutelement-legend.cpp', size 30933  */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAbstractLegendItem
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAbstractLegendItem
   \brief The abstract base class for all entries in a QCPLegend.
 
   It defines a very basic interface for entries in a QCPLegend. For representing plottables in the
   legend, the subclass \ref QCPPlottableLegendItem is more suitable.
 
   Only derive directly from this class when you need absolute freedom (e.g. a custom legend entry
   that's not even associated with a plottable).
 
   You must implement the following pure virtual functions:
   \li \ref draw (from QCPLayerable)
 
   You inherit the following members you may use:
   <table>
     <tr>
       <td>QCPLegend *\b mParentLegend</td>
       <td>A pointer to the parent QCPLegend.</td>
     </tr><tr>
       <td>QFont \b mFont</td>
       <td>The generic font of the item. You should use this font for all or at least the most prominent text of the item.</td>
     </tr>
   </table>
 */
 
 /* start of documentation of signals */
 
 /*! \fn void QCPAbstractLegendItem::selectionChanged(bool selected)
 
   This signal is emitted when the selection state of this legend item has changed, either by user
   interaction or by a direct call to \ref setSelected.
 */
 
 /* end of documentation of signals */
 
 /*!
   Constructs a QCPAbstractLegendItem and associates it with the QCPLegend \a parent. This does not
   cause the item to be added to \a parent, so \ref QCPLegend::addItem must be called separately.
 */
 QCPAbstractLegendItem::QCPAbstractLegendItem(QCPLegend *parent)
     : QCPLayoutElement(parent->parentPlot()), mParentLegend(parent), mFont(parent->font()),
       mTextColor(parent->textColor()), mSelectedFont(parent->selectedFont()),
       mSelectedTextColor(parent->selectedTextColor()), mSelectable(true), mSelected(false)
 {
     setLayer(QLatin1String("legend"));
     setMargins(QMargins(0, 0, 0, 0));
 }
 
 /*!
   Sets the default font of this specific legend item to \a font.
 
   \see setTextColor, QCPLegend::setFont
 */
 void QCPAbstractLegendItem::setFont(const QFont &font)
 {
     mFont = font;
 }
 
 /*!
   Sets the default text color of this specific legend item to \a color.
 
   \see setFont, QCPLegend::setTextColor
 */
 void QCPAbstractLegendItem::setTextColor(const QColor &color)
 {
     mTextColor = color;
 }
 
 /*!
   When this legend item is selected, \a font is used to draw generic text, instead of the normal
   font set with \ref setFont.
 
   \see setFont, QCPLegend::setSelectedFont
 */
 void QCPAbstractLegendItem::setSelectedFont(const QFont &font)
 {
     mSelectedFont = font;
 }
 
 /*!
   When this legend item is selected, \a color is used to draw generic text, instead of the normal
   color set with \ref setTextColor.
 
   \see setTextColor, QCPLegend::setSelectedTextColor
 */
 void QCPAbstractLegendItem::setSelectedTextColor(const QColor &color)
 {
     mSelectedTextColor = color;
 }
 
 /*!
   Sets whether this specific legend item is selectable.
 
   \see setSelectedParts, QCustomPlot::setInteractions
 */
 void QCPAbstractLegendItem::setSelectable(bool selectable)
 {
     if (mSelectable != selectable)
     {
         mSelectable = selectable;
         emit selectableChanged(mSelectable);
     }
 }
 
 /*!
   Sets whether this specific legend item is selected.
 
   It is possible to set the selection state of this item by calling this function directly, even if
   setSelectable is set to false.
 
   \see setSelectableParts, QCustomPlot::setInteractions
 */
 void QCPAbstractLegendItem::setSelected(bool selected)
 {
     if (mSelected != selected)
     {
         mSelected = selected;
         emit selectionChanged(mSelected);
     }
 }
 
 /* inherits documentation from base class */
 double QCPAbstractLegendItem::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (!mParentPlot)
         return -1;
     if (onlySelectable && (!mSelectable || !mParentLegend->selectableParts().testFlag(QCPLegend::spItems)))
         return -1;
 
     if (mRect.contains(pos.toPoint()))
         return mParentPlot->selectionTolerance() * 0.99;
     else
         return -1;
 }
 
 /* inherits documentation from base class */
 void QCPAbstractLegendItem::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aeLegendItems);
 }
 
 /* inherits documentation from base class */
 QRect QCPAbstractLegendItem::clipRect() const
 {
     return mOuterRect;
 }
 
 /* inherits documentation from base class */
 void QCPAbstractLegendItem::selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                                         bool *selectionStateChanged)
 {
     Q_UNUSED(event)
     Q_UNUSED(details)
     if (mSelectable && mParentLegend->selectableParts().testFlag(QCPLegend::spItems))
     {
         bool selBefore = mSelected;
         setSelected(additive ? !mSelected : true);
         if (selectionStateChanged)
             *selectionStateChanged = mSelected != selBefore;
     }
 }
 
 /* inherits documentation from base class */
 void QCPAbstractLegendItem::deselectEvent(bool *selectionStateChanged)
 {
     if (mSelectable && mParentLegend->selectableParts().testFlag(QCPLegend::spItems))
     {
         bool selBefore = mSelected;
         setSelected(false);
         if (selectionStateChanged)
             *selectionStateChanged = mSelected != selBefore;
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPPlottableLegendItem
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPPlottableLegendItem
   \brief A legend item representing a plottable with an icon and the plottable name.
 
   This is the standard legend item for plottables. It displays an icon of the plottable next to the
   plottable name. The icon is drawn by the respective plottable itself (\ref
   QCPAbstractPlottable::drawLegendIcon), and tries to give an intuitive symbol for the plottable.
   For example, the QCPGraph draws a centered horizontal line and/or a single scatter point in the
   middle.
 
   Legend items of this type are always associated with one plottable (retrievable via the
   plottable() function and settable with the constructor). You may change the font of the plottable
   name with \ref setFont. Icon padding and border pen is taken from the parent QCPLegend, see \ref
   QCPLegend::setIconBorderPen and \ref QCPLegend::setIconTextPadding.
 
   The function \ref QCPAbstractPlottable::addToLegend/\ref QCPAbstractPlottable::removeFromLegend
   creates/removes legend items of this type in the default implementation. However, these functions
   may be reimplemented such that a different kind of legend item (e.g a direct subclass of
   QCPAbstractLegendItem) is used for that plottable.
 
   Since QCPLegend is based on QCPLayoutGrid, a legend item itself is just a subclass of
   QCPLayoutElement. While it could be added to a legend (or any other layout) via the normal layout
   interface, QCPLegend has specialized functions for handling legend items conveniently, see the
   documentation of \ref QCPLegend.
 */
 
 /*!
   Creates a new legend item associated with \a plottable.
 
   Once it's created, it can be added to the legend via \ref QCPLegend::addItem.
 
   A more convenient way of adding/removing a plottable to/from the legend is via the functions \ref
   QCPAbstractPlottable::addToLegend and \ref QCPAbstractPlottable::removeFromLegend.
 */
 QCPPlottableLegendItem::QCPPlottableLegendItem(QCPLegend *parent, QCPAbstractPlottable *plottable)
     : QCPAbstractLegendItem(parent), mPlottable(plottable)
 {
     setAntialiased(false);
 }
 
 /*! \internal
 
   Returns the pen that shall be used to draw the icon border, taking into account the selection
   state of this item.
 */
 QPen QCPPlottableLegendItem::getIconBorderPen() const
 {
     return mSelected ? mParentLegend->selectedIconBorderPen() : mParentLegend->iconBorderPen();
 }
 
 /*! \internal
 
   Returns the text color that shall be used to draw text, taking into account the selection state
   of this item.
 */
 QColor QCPPlottableLegendItem::getTextColor() const
 {
     return mSelected ? mSelectedTextColor : mTextColor;
 }
 
 /*! \internal
 
   Returns the font that shall be used to draw text, taking into account the selection state of this
   item.
 */
 QFont QCPPlottableLegendItem::getFont() const
 {
     return mSelected ? mSelectedFont : mFont;
 }
 
 /*! \internal
 
   Draws the item with \a painter. The size and position of the drawn legend item is defined by the
   parent layout (typically a \ref QCPLegend) and the \ref minimumSizeHint and \ref maximumSizeHint
   of this legend item.
 */
 void QCPPlottableLegendItem::draw(QCPPainter *painter)
 {
     if (!mPlottable)
         return;
     painter->setFont(getFont());
     painter->setPen(QPen(getTextColor()));
     QSizeF iconSize = mParentLegend->iconSize();
     QRectF textRect =
         painter->fontMetrics().boundingRect(0, 0, 0, iconSize.height(), Qt::TextDontClip, mPlottable->name());
     QRectF iconRect(mRect.topLeft(), iconSize);
     int textHeight = qMax(
         textRect.height(),
         iconSize
             .height()); // if text has smaller height than icon, center text vertically in icon height, else align tops
     painter->drawText(mRect.x() + iconSize.width() + mParentLegend->iconTextPadding(), mRect.y(), textRect.width(),
                       textHeight, Qt::TextDontClip, mPlottable->name());
     // draw icon:
     painter->save();
     painter->setClipRect(iconRect, Qt::IntersectClip);
     mPlottable->drawLegendIcon(painter, iconRect);
     painter->restore();
     // draw icon border:
     if (getIconBorderPen().style() != Qt::NoPen)
     {
         painter->setPen(getIconBorderPen());
         painter->setBrush(Qt::NoBrush);
         int halfPen = qCeil(painter->pen().widthF() * 0.5) + 1;
         painter->setClipRect(mOuterRect.adjusted(
             -halfPen, -halfPen, halfPen,
             halfPen)); // extend default clip rect so thicker pens (especially during selection) are not clipped
         painter->drawRect(iconRect);
     }
 }
 
 /*! \internal
 
   Calculates and returns the size of this item. This includes the icon, the text and the padding in
   between.
 
   \seebaseclassmethod
 */
 QSize QCPPlottableLegendItem::minimumSizeHint() const
 {
     if (!mPlottable)
         return QSize();
     QSize result(0, 0);
     QRect textRect;
     QFontMetrics fontMetrics(getFont());
     QSize iconSize = mParentLegend->iconSize();
     textRect       = fontMetrics.boundingRect(0, 0, 0, iconSize.height(), Qt::TextDontClip, mPlottable->name());
     result.setWidth(iconSize.width() + mParentLegend->iconTextPadding() + textRect.width() + mMargins.left() +
                     mMargins.right());
     result.setHeight(qMax(textRect.height(), iconSize.height()) + mMargins.top() + mMargins.bottom());
     return result;
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPLegend
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPLegend
   \brief Manages a legend inside a QCustomPlot.
 
   A legend is a small box somewhere in the plot which lists plottables with their name and icon.
 
   Normally, the legend is populated by calling \ref QCPAbstractPlottable::addToLegend. The
   respective legend item can be removed with \ref QCPAbstractPlottable::removeFromLegend. However,
   QCPLegend also offers an interface to add and manipulate legend items directly: \ref item, \ref
   itemWithPlottable, \ref itemCount, \ref addItem, \ref removeItem, etc.
 
   Since \ref QCPLegend derives from \ref QCPLayoutGrid, it can be placed in any position a \ref
   QCPLayoutElement may be positioned. The legend items are themselves \ref QCPLayoutElement
   "QCPLayoutElements" which are placed in the grid layout of the legend. \ref QCPLegend only adds
   an interface specialized for handling child elements of type \ref QCPAbstractLegendItem, as
   mentioned above. In principle, any other layout elements may also be added to a legend via the
   normal \ref QCPLayoutGrid interface. See the special page about \link thelayoutsystem The Layout
   System\endlink for examples on how to add other elements to the legend and move it outside the axis
   rect.
 
   Use the methods \ref setFillOrder and \ref setWrap inherited from \ref QCPLayoutGrid to control
   in which order (column first or row first) the legend is filled up when calling \ref addItem, and
   at which column or row wrapping occurs.
 
   By default, every QCustomPlot has one legend (\ref QCustomPlot::legend) which is placed in the
   inset layout of the main axis rect (\ref QCPAxisRect::insetLayout). To move the legend to another
   position inside the axis rect, use the methods of the \ref QCPLayoutInset. To move the legend
   outside of the axis rect, place it anywhere else with the \ref QCPLayout/\ref QCPLayoutElement
   interface.
 */
 
 /* start of documentation of signals */
 
 /*! \fn void QCPLegend::selectionChanged(QCPLegend::SelectableParts selection);
 
   This signal is emitted when the selection state of this legend has changed.
 
   \see setSelectedParts, setSelectableParts
 */
 
 /* end of documentation of signals */
 
 /*!
   Constructs a new QCPLegend instance with default values.
 
   Note that by default, QCustomPlot already contains a legend ready to be used as \ref
   QCustomPlot::legend
 */
 QCPLegend::QCPLegend()
 {
     setFillOrder(QCPLayoutGrid::foRowsFirst);
     setWrap(0);
 
     setRowSpacing(3);
     setColumnSpacing(8);
     setMargins(QMargins(7, 5, 7, 4));
     setAntialiased(false);
     setIconSize(32, 18);
 
     setIconTextPadding(7);
 
     setSelectableParts(spLegendBox | spItems);
     setSelectedParts(spNone);
 
     setBorderPen(QPen(Qt::black, 0));
     setSelectedBorderPen(QPen(Qt::blue, 2));
     setIconBorderPen(Qt::NoPen);
     setSelectedIconBorderPen(QPen(Qt::blue, 2));
     setBrush(Qt::white);
     setSelectedBrush(Qt::white);
     setTextColor(Qt::black);
     setSelectedTextColor(Qt::blue);
 }
 
 QCPLegend::~QCPLegend()
 {
     clearItems();
     if (qobject_cast<QCustomPlot *>(
             mParentPlot)) // make sure this isn't called from QObject dtor when QCustomPlot is already destructed (happens when the legend is not in any layout and thus QObject-child of QCustomPlot)
         mParentPlot->legendRemoved(this);
 }
 
 /* no doc for getter, see setSelectedParts */
 QCPLegend::SelectableParts QCPLegend::selectedParts() const
 {
     // check whether any legend elements selected, if yes, add spItems to return value
     bool hasSelectedItems = false;
     for (int i = 0; i < itemCount(); ++i)
     {
         if (item(i) && item(i)->selected())
         {
             hasSelectedItems = true;
             break;
         }
     }
     if (hasSelectedItems)
         return mSelectedParts | spItems;
     else
         return mSelectedParts & ~spItems;
 }
 
 /*!
   Sets the pen, the border of the entire legend is drawn with.
 */
 void QCPLegend::setBorderPen(const QPen &pen)
 {
     mBorderPen = pen;
 }
 
 /*!
   Sets the brush of the legend background.
 */
 void QCPLegend::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   Sets the default font of legend text. Legend items that draw text (e.g. the name of a graph) will
   use this font by default. However, a different font can be specified on a per-item-basis by
   accessing the specific legend item.
 
   This function will also set \a font on all already existing legend items.
 
   \see QCPAbstractLegendItem::setFont
 */
 void QCPLegend::setFont(const QFont &font)
 {
     mFont = font;
     for (int i = 0; i < itemCount(); ++i)
     {
         if (item(i))
             item(i)->setFont(mFont);
     }
 }
 
 /*!
   Sets the default color of legend text. Legend items that draw text (e.g. the name of a graph)
   will use this color by default. However, a different colors can be specified on a per-item-basis
   by accessing the specific legend item.
 
   This function will also set \a color on all already existing legend items.
 
   \see QCPAbstractLegendItem::setTextColor
 */
 void QCPLegend::setTextColor(const QColor &color)
 {
     mTextColor = color;
     for (int i = 0; i < itemCount(); ++i)
     {
         if (item(i))
             item(i)->setTextColor(color);
     }
 }
 
 /*!
   Sets the size of legend icons. Legend items that draw an icon (e.g. a visual
   representation of the graph) will use this size by default.
 */
 void QCPLegend::setIconSize(const QSize &size)
 {
     mIconSize = size;
 }
 
 /*! \overload
 */
 void QCPLegend::setIconSize(int width, int height)
 {
     mIconSize.setWidth(width);
     mIconSize.setHeight(height);
 }
 
 /*!
   Sets the horizontal space in pixels between the legend icon and the text next to it.
   Legend items that draw an icon (e.g. a visual representation of the graph) and text (e.g. the
   name of the graph) will use this space by default.
 */
 void QCPLegend::setIconTextPadding(int padding)
 {
     mIconTextPadding = padding;
 }
 
 /*!
   Sets the pen used to draw a border around each legend icon. Legend items that draw an
   icon (e.g. a visual representation of the graph) will use this pen by default.
 
   If no border is wanted, set this to \a Qt::NoPen.
 */
 void QCPLegend::setIconBorderPen(const QPen &pen)
 {
     mIconBorderPen = pen;
 }
 
 /*!
   Sets whether the user can (de-)select the parts in \a selectable by clicking on the QCustomPlot surface.
   (When \ref QCustomPlot::setInteractions contains \ref QCP::iSelectLegend.)
 
   However, even when \a selectable is set to a value not allowing the selection of a specific part,
   it is still possible to set the selection of this part manually, by calling \ref setSelectedParts
   directly.
 
   \see SelectablePart, setSelectedParts
 */
 void QCPLegend::setSelectableParts(const SelectableParts &selectable)
 {
     if (mSelectableParts != selectable)
     {
         mSelectableParts = selectable;
         emit selectableChanged(mSelectableParts);
     }
 }
 
 /*!
   Sets the selected state of the respective legend parts described by \ref SelectablePart. When a part
   is selected, it uses a different pen/font and brush. If some legend items are selected and \a selected
   doesn't contain \ref spItems, those items become deselected.
 
   The entire selection mechanism is handled automatically when \ref QCustomPlot::setInteractions
   contains iSelectLegend. You only need to call this function when you wish to change the selection
   state manually.
 
   This function can change the selection state of a part even when \ref setSelectableParts was set to a
   value that actually excludes the part.
 
   emits the \ref selectionChanged signal when \a selected is different from the previous selection state.
 
   Note that it doesn't make sense to set the selected state \ref spItems here when it wasn't set
   before, because there's no way to specify which exact items to newly select. Do this by calling
   \ref QCPAbstractLegendItem::setSelected directly on the legend item you wish to select.
 
   \see SelectablePart, setSelectableParts, selectTest, setSelectedBorderPen, setSelectedIconBorderPen, setSelectedBrush,
   setSelectedFont
 */
 void QCPLegend::setSelectedParts(const SelectableParts &selected)
 {
     SelectableParts newSelected = selected;
     mSelectedParts              = this->selectedParts(); // update mSelectedParts in case item selection changed
 
     if (mSelectedParts != newSelected)
     {
         if (!mSelectedParts.testFlag(spItems) &&
             newSelected.testFlag(spItems)) // attempt to set spItems flag (can't do that)
         {
             qDebug() << Q_FUNC_INFO << "spItems flag can not be set, it can only be unset with this function";
             newSelected &= ~spItems;
         }
         if (mSelectedParts.testFlag(spItems) &&
             !newSelected.testFlag(spItems)) // spItems flag was unset, so clear item selection
         {
             for (int i = 0; i < itemCount(); ++i)
             {
                 if (item(i))
                     item(i)->setSelected(false);
             }
         }
         mSelectedParts = newSelected;
         emit selectionChanged(mSelectedParts);
     }
 }
 
 /*!
   When the legend box is selected, this pen is used to draw the border instead of the normal pen
   set via \ref setBorderPen.
 
   \see setSelectedParts, setSelectableParts, setSelectedBrush
 */
 void QCPLegend::setSelectedBorderPen(const QPen &pen)
 {
     mSelectedBorderPen = pen;
 }
 
 /*!
   Sets the pen legend items will use to draw their icon borders, when they are selected.
 
   \see setSelectedParts, setSelectableParts, setSelectedFont
 */
 void QCPLegend::setSelectedIconBorderPen(const QPen &pen)
 {
     mSelectedIconBorderPen = pen;
 }
 
 /*!
   When the legend box is selected, this brush is used to draw the legend background instead of the normal brush
   set via \ref setBrush.
 
   \see setSelectedParts, setSelectableParts, setSelectedBorderPen
 */
 void QCPLegend::setSelectedBrush(const QBrush &brush)
 {
     mSelectedBrush = brush;
 }
 
 /*!
   Sets the default font that is used by legend items when they are selected.
 
   This function will also set \a font on all already existing legend items.
 
   \see setFont, QCPAbstractLegendItem::setSelectedFont
 */
 void QCPLegend::setSelectedFont(const QFont &font)
 {
     mSelectedFont = font;
     for (int i = 0; i < itemCount(); ++i)
     {
         if (item(i))
             item(i)->setSelectedFont(font);
     }
 }
 
 /*!
   Sets the default text color that is used by legend items when they are selected.
 
   This function will also set \a color on all already existing legend items.
 
   \see setTextColor, QCPAbstractLegendItem::setSelectedTextColor
 */
 void QCPLegend::setSelectedTextColor(const QColor &color)
 {
     mSelectedTextColor = color;
     for (int i = 0; i < itemCount(); ++i)
     {
         if (item(i))
             item(i)->setSelectedTextColor(color);
     }
 }
 
 /*!
   Returns the item with index \a i.
 
   Note that the linear index depends on the current fill order (\ref setFillOrder).
 
   \see itemCount, addItem, itemWithPlottable
 */
 QCPAbstractLegendItem *QCPLegend::item(int index) const
 {
     return qobject_cast<QCPAbstractLegendItem *>(elementAt(index));
 }
 
 /*!
   Returns the QCPPlottableLegendItem which is associated with \a plottable (e.g. a \ref QCPGraph*).
   If such an item isn't in the legend, returns 0.
 
   \see hasItemWithPlottable
 */
 QCPPlottableLegendItem *QCPLegend::itemWithPlottable(const QCPAbstractPlottable *plottable) const
 {
     for (int i = 0; i < itemCount(); ++i)
     {
         if (QCPPlottableLegendItem *pli = qobject_cast<QCPPlottableLegendItem *>(item(i)))
         {
             if (pli->plottable() == plottable)
                 return pli;
         }
     }
-    return 0;
+    return nullptr;
 }
 
 /*!
   Returns the number of items currently in the legend.
 
   Note that if empty cells are in the legend (e.g. by calling methods of the \ref QCPLayoutGrid
   base class which allows creating empty cells), they are included in the returned count.
 
   \see item
 */
 int QCPLegend::itemCount() const
 {
     return elementCount();
 }
 
 /*!
   Returns whether the legend contains \a item.
 
   \see hasItemWithPlottable
 */
 bool QCPLegend::hasItem(QCPAbstractLegendItem *item) const
 {
     for (int i = 0; i < itemCount(); ++i)
     {
         if (item == this->item(i))
             return true;
     }
     return false;
 }
 
 /*!
   Returns whether the legend contains a QCPPlottableLegendItem which is associated with \a plottable (e.g. a \ref QCPGraph*).
   If such an item isn't in the legend, returns false.
 
   \see itemWithPlottable
 */
 bool QCPLegend::hasItemWithPlottable(const QCPAbstractPlottable *plottable) const
 {
     return itemWithPlottable(plottable);
 }
 
 /*!
   Adds \a item to the legend, if it's not present already. The element is arranged according to the
   current fill order (\ref setFillOrder) and wrapping (\ref setWrap).
 
   Returns true on sucess, i.e. if the item wasn't in the list already and has been successfuly added.
 
   The legend takes ownership of the item.
 
   \see removeItem, item, hasItem
 */
 bool QCPLegend::addItem(QCPAbstractLegendItem *item)
 {
     return addElement(item);
 }
 
 /*! \overload
 
   Removes the item with the specified \a index from the legend and deletes it.
 
   After successful removal, the legend is reordered according to the current fill order (\ref
   setFillOrder) and wrapping (\ref setWrap), so no empty cell remains where the removed \a item
   was. If you don't want this, rather use the raw element interface of \ref QCPLayoutGrid.
 
   Returns true, if successful. Unlike \ref QCPLayoutGrid::removeAt, this method only removes
   elements derived from \ref QCPAbstractLegendItem.
 
   \see itemCount, clearItems
 */
 bool QCPLegend::removeItem(int index)
 {
     if (QCPAbstractLegendItem *ali = item(index))
     {
         bool success = remove(ali);
         if (success)
             setFillOrder(fillOrder(), true); // gets rid of empty cell by reordering
         return success;
     }
     else
         return false;
 }
 
 /*! \overload
 
   Removes \a item from the legend and deletes it.
 
   After successful removal, the legend is reordered according to the current fill order (\ref
   setFillOrder) and wrapping (\ref setWrap), so no empty cell remains where the removed \a item
   was. If you don't want this, rather use the raw element interface of \ref QCPLayoutGrid.
 
   Returns true, if successful.
 
   \see clearItems
 */
 bool QCPLegend::removeItem(QCPAbstractLegendItem *item)
 {
     bool success = remove(item);
     if (success)
         setFillOrder(fillOrder(), true); // gets rid of empty cell by reordering
     return success;
 }
 
 /*!
   Removes all items from the legend.
 */
 void QCPLegend::clearItems()
 {
     for (int i = itemCount() - 1; i >= 0; --i)
         removeItem(i);
 }
 
 /*!
   Returns the legend items that are currently selected. If no items are selected,
   the list is empty.
 
   \see QCPAbstractLegendItem::setSelected, setSelectable
 */
 QList<QCPAbstractLegendItem *> QCPLegend::selectedItems() const
 {
     QList<QCPAbstractLegendItem *> result;
     for (int i = 0; i < itemCount(); ++i)
     {
         if (QCPAbstractLegendItem *ali = item(i))
         {
             if (ali->selected())
                 result.append(ali);
         }
     }
     return result;
 }
 
 /*! \internal
 
   A convenience function to easily set the QPainter::Antialiased hint on the provided \a painter
   before drawing main legend elements.
 
   This is the antialiasing state the painter passed to the \ref draw method is in by default.
 
   This function takes into account the local setting of the antialiasing flag as well as the
   overrides set with \ref QCustomPlot::setAntialiasedElements and \ref
   QCustomPlot::setNotAntialiasedElements.
 
   \seebaseclassmethod
 
   \see setAntialiased
 */
 void QCPLegend::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aeLegend);
 }
 
 /*! \internal
 
   Returns the pen used to paint the border of the legend, taking into account the selection state
   of the legend box.
 */
 QPen QCPLegend::getBorderPen() const
 {
     return mSelectedParts.testFlag(spLegendBox) ? mSelectedBorderPen : mBorderPen;
 }
 
 /*! \internal
 
   Returns the brush used to paint the background of the legend, taking into account the selection
   state of the legend box.
 */
 QBrush QCPLegend::getBrush() const
 {
     return mSelectedParts.testFlag(spLegendBox) ? mSelectedBrush : mBrush;
 }
 
 /*! \internal
 
   Draws the legend box with the provided \a painter. The individual legend items are layerables
   themselves, thus are drawn independently.
 */
 void QCPLegend::draw(QCPPainter *painter)
 {
     // draw background rect:
     painter->setBrush(getBrush());
     painter->setPen(getBorderPen());
     painter->drawRect(mOuterRect);
 }
 
 /* inherits documentation from base class */
 double QCPLegend::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     if (!mParentPlot)
         return -1;
     if (onlySelectable && !mSelectableParts.testFlag(spLegendBox))
         return -1;
 
     if (mOuterRect.contains(pos.toPoint()))
     {
         if (details)
             details->setValue(spLegendBox);
         return mParentPlot->selectionTolerance() * 0.99;
     }
     return -1;
 }
 
 /* inherits documentation from base class */
 void QCPLegend::selectEvent(QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged)
 {
     Q_UNUSED(event)
     mSelectedParts = selectedParts(); // in case item selection has changed
     if (details.value<SelectablePart>() == spLegendBox && mSelectableParts.testFlag(spLegendBox))
     {
         SelectableParts selBefore = mSelectedParts;
         setSelectedParts(
             additive ?
                 mSelectedParts ^ spLegendBox :
                 mSelectedParts |
                     spLegendBox); // no need to unset spItems in !additive case, because they will be deselected by QCustomPlot (they're normal QCPLayerables with own deselectEvent)
         if (selectionStateChanged)
             *selectionStateChanged = mSelectedParts != selBefore;
     }
 }
 
 /* inherits documentation from base class */
 void QCPLegend::deselectEvent(bool *selectionStateChanged)
 {
     mSelectedParts = selectedParts(); // in case item selection has changed
     if (mSelectableParts.testFlag(spLegendBox))
     {
         SelectableParts selBefore = mSelectedParts;
         setSelectedParts(selectedParts() & ~spLegendBox);
         if (selectionStateChanged)
             *selectionStateChanged = mSelectedParts != selBefore;
     }
 }
 
 /* inherits documentation from base class */
 QCP::Interaction QCPLegend::selectionCategory() const
 {
     return QCP::iSelectLegend;
 }
 
 /* inherits documentation from base class */
 QCP::Interaction QCPAbstractLegendItem::selectionCategory() const
 {
     return QCP::iSelectLegend;
 }
 
 /* inherits documentation from base class */
 void QCPLegend::parentPlotInitialized(QCustomPlot *parentPlot)
 {
     if (parentPlot && !parentPlot->legend)
         parentPlot->legend = this;
 }
 /* end of 'src/layoutelements/layoutelement-legend.cpp' */
 
 /* including file 'src/layoutelements/layoutelement-textelement.cpp', size 12759 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200     */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPTextElement
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPTextElement
   \brief A layout element displaying a text
 
   The text may be specified with \ref setText, the formatting can be controlled with \ref setFont,
   \ref setTextColor, and \ref setTextFlags.
 
   A text element can be added as follows:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcptextelement-creation
 */
 
 /* start documentation of signals */
 
 /*! \fn void QCPTextElement::selectionChanged(bool selected)
 
   This signal is emitted when the selection state has changed to \a selected, either by user
   interaction or by a direct call to \ref setSelected.
 
   \see setSelected, setSelectable
 */
 
 /*! \fn void QCPTextElement::clicked(QMouseEvent *event)
 
   This signal is emitted when the text element is clicked.
 
   \see doubleClicked, selectTest
 */
 
 /*! \fn void QCPTextElement::doubleClicked(QMouseEvent *event)
 
   This signal is emitted when the text element is double clicked.
 
   \see clicked, selectTest
 */
 
 /* end documentation of signals */
 
 /*! \overload
 
   Creates a new QCPTextElement instance and sets default values. The initial text is empty (\ref
   setText).
 */
 QCPTextElement::QCPTextElement(QCustomPlot *parentPlot)
     : QCPLayoutElement(parentPlot), mText(), mTextFlags(Qt::AlignCenter | Qt::TextWordWrap),
       mFont(QFont(QLatin1String("sans serif"), 12)), // will be taken from parentPlot if available, see below
       mTextColor(Qt::black),
       mSelectedFont(QFont(QLatin1String("sans serif"), 12)), // will be taken from parentPlot if available, see below
       mSelectedTextColor(Qt::blue), mSelectable(false), mSelected(false)
 {
     if (parentPlot)
     {
         mFont         = parentPlot->font();
         mSelectedFont = parentPlot->font();
     }
     setMargins(QMargins(2, 2, 2, 2));
 }
 
 /*! \overload
 
   Creates a new QCPTextElement instance and sets default values.
 
   The initial text is set to \a text.
 */
 QCPTextElement::QCPTextElement(QCustomPlot *parentPlot, const QString &text)
     : QCPLayoutElement(parentPlot), mText(text), mTextFlags(Qt::AlignCenter | Qt::TextWordWrap),
       mFont(QFont(QLatin1String("sans serif"), 12)), // will be taken from parentPlot if available, see below
       mTextColor(Qt::black),
       mSelectedFont(QFont(QLatin1String("sans serif"), 12)), // will be taken from parentPlot if available, see below
       mSelectedTextColor(Qt::blue), mSelectable(false), mSelected(false)
 {
     if (parentPlot)
     {
         mFont         = parentPlot->font();
         mSelectedFont = parentPlot->font();
     }
     setMargins(QMargins(2, 2, 2, 2));
 }
 
 /*! \overload
 
   Creates a new QCPTextElement instance and sets default values.
 
   The initial text is set to \a text with \a pointSize.
 */
 QCPTextElement::QCPTextElement(QCustomPlot *parentPlot, const QString &text, double pointSize)
     : QCPLayoutElement(parentPlot), mText(text), mTextFlags(Qt::AlignCenter | Qt::TextWordWrap),
       mFont(QFont(QLatin1String("sans serif"), pointSize)), // will be taken from parentPlot if available, see below
       mTextColor(Qt::black), mSelectedFont(QFont(QLatin1String("sans serif"),
                                                  pointSize)), // will be taken from parentPlot if available, see below
       mSelectedTextColor(Qt::blue), mSelectable(false), mSelected(false)
 {
     if (parentPlot)
     {
         mFont = parentPlot->font();
         mFont.setPointSizeF(pointSize);
         mSelectedFont = parentPlot->font();
         mSelectedFont.setPointSizeF(pointSize);
     }
     setMargins(QMargins(2, 2, 2, 2));
 }
 
 /*! \overload
 
   Creates a new QCPTextElement instance and sets default values.
 
   The initial text is set to \a text with \a pointSize and the specified \a fontFamily.
 */
 QCPTextElement::QCPTextElement(QCustomPlot *parentPlot, const QString &text, const QString &fontFamily,
                                double pointSize)
     : QCPLayoutElement(parentPlot), mText(text), mTextFlags(Qt::AlignCenter | Qt::TextWordWrap),
       mFont(QFont(fontFamily, pointSize)), mTextColor(Qt::black), mSelectedFont(QFont(fontFamily, pointSize)),
       mSelectedTextColor(Qt::blue), mSelectable(false), mSelected(false)
 {
     setMargins(QMargins(2, 2, 2, 2));
 }
 
 /*! \overload
 
   Creates a new QCPTextElement instance and sets default values.
 
   The initial text is set to \a text with the specified \a font.
 */
 QCPTextElement::QCPTextElement(QCustomPlot *parentPlot, const QString &text, const QFont &font)
     : QCPLayoutElement(parentPlot), mText(text), mTextFlags(Qt::AlignCenter | Qt::TextWordWrap), mFont(font),
       mTextColor(Qt::black), mSelectedFont(font), mSelectedTextColor(Qt::blue), mSelectable(false), mSelected(false)
 {
     setMargins(QMargins(2, 2, 2, 2));
 }
 
 /*!
   Sets the text that will be displayed to \a text. Multiple lines can be created by insertion of "\n".
 
   \see setFont, setTextColor, setTextFlags
 */
 void QCPTextElement::setText(const QString &text)
 {
     mText = text;
 }
 
 /*!
   Sets options for text alignment and wrapping behaviour. \a flags is a bitwise OR-combination of
   \c Qt::AlignmentFlag and \c Qt::TextFlag enums.
 
   Possible enums are:
   - Qt::AlignLeft
   - Qt::AlignRight
   - Qt::AlignHCenter
   - Qt::AlignJustify
   - Qt::AlignTop
   - Qt::AlignBottom
   - Qt::AlignVCenter
   - Qt::AlignCenter
   - Qt::TextDontClip
   - Qt::TextSingleLine
   - Qt::TextExpandTabs
   - Qt::TextShowMnemonic
   - Qt::TextWordWrap
   - Qt::TextIncludeTrailingSpaces
 */
 void QCPTextElement::setTextFlags(int flags)
 {
     mTextFlags = flags;
 }
 
 /*!
   Sets the \a font of the text.
 
   \see setTextColor, setSelectedFont
 */
 void QCPTextElement::setFont(const QFont &font)
 {
     mFont = font;
 }
 
 /*!
   Sets the \a color of the text.
 
   \see setFont, setSelectedTextColor
 */
 void QCPTextElement::setTextColor(const QColor &color)
 {
     mTextColor = color;
 }
 
 /*!
   Sets the \a font of the text that will be used if the text element is selected (\ref setSelected).
 
   \see setFont
 */
 void QCPTextElement::setSelectedFont(const QFont &font)
 {
     mSelectedFont = font;
 }
 
 /*!
   Sets the \a color of the text that will be used if the text element is selected (\ref setSelected).
 
   \see setTextColor
 */
 void QCPTextElement::setSelectedTextColor(const QColor &color)
 {
     mSelectedTextColor = color;
 }
 
 /*!
   Sets whether the user may select this text element.
 
   Note that even when \a selectable is set to <tt>false</tt>, the selection state may be changed
   programmatically via \ref setSelected.
 */
 void QCPTextElement::setSelectable(bool selectable)
 {
     if (mSelectable != selectable)
     {
         mSelectable = selectable;
         emit selectableChanged(mSelectable);
     }
 }
 
 /*!
   Sets the selection state of this text element to \a selected. If the selection has changed, \ref
   selectionChanged is emitted.
 
   Note that this function can change the selection state independently of the current \ref
   setSelectable state.
 */
 void QCPTextElement::setSelected(bool selected)
 {
     if (mSelected != selected)
     {
         mSelected = selected;
         emit selectionChanged(mSelected);
     }
 }
 
 /* inherits documentation from base class */
 void QCPTextElement::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     applyAntialiasingHint(painter, mAntialiased, QCP::aeOther);
 }
 
 /* inherits documentation from base class */
 void QCPTextElement::draw(QCPPainter *painter)
 {
     painter->setFont(mainFont());
     painter->setPen(QPen(mainTextColor()));
     painter->drawText(mRect, Qt::AlignCenter, mText, &mTextBoundingRect);
 }
 
 /* inherits documentation from base class */
 QSize QCPTextElement::minimumSizeHint() const
 {
     QFontMetrics metrics(mFont);
     QSize result = metrics.boundingRect(0, 0, 0, 0, Qt::AlignCenter, mText).size();
     result.rwidth() += mMargins.left() + mMargins.right();
     result.rheight() += mMargins.top() + mMargins.bottom();
     return result;
 }
 
 /* inherits documentation from base class */
 QSize QCPTextElement::maximumSizeHint() const
 {
     QFontMetrics metrics(mFont);
     QSize result = metrics.boundingRect(0, 0, 0, 0, Qt::AlignCenter, mText).size();
     result.rheight() += mMargins.top() + mMargins.bottom();
     result.setWidth(QWIDGETSIZE_MAX);
     return result;
 }
 
 /* inherits documentation from base class */
 void QCPTextElement::selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                                  bool *selectionStateChanged)
 {
     Q_UNUSED(event)
     Q_UNUSED(details)
     if (mSelectable)
     {
         bool selBefore = mSelected;
         setSelected(additive ? !mSelected : true);
         if (selectionStateChanged)
             *selectionStateChanged = mSelected != selBefore;
     }
 }
 
 /* inherits documentation from base class */
 void QCPTextElement::deselectEvent(bool *selectionStateChanged)
 {
     if (mSelectable)
     {
         bool selBefore = mSelected;
         setSelected(false);
         if (selectionStateChanged)
             *selectionStateChanged = mSelected != selBefore;
     }
 }
 
 /*!
   Returns 0.99*selectionTolerance (see \ref QCustomPlot::setSelectionTolerance) when \a pos is
   within the bounding box of the text element's text. Note that this bounding box is updated in the
   draw call.
 
   If \a pos is outside the text's bounding box or if \a onlySelectable is true and this text
   element is not selectable (\ref setSelectable), returns -1.
 
   \seebaseclassmethod
 */
 double QCPTextElement::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     if (mTextBoundingRect.contains(pos.toPoint()))
         return mParentPlot->selectionTolerance() * 0.99;
     else
         return -1;
 }
 
 /*!
   Accepts the mouse event in order to emit the according click signal in the \ref
   mouseReleaseEvent.
 
   \seebaseclassmethod
 */
 void QCPTextElement::mousePressEvent(QMouseEvent *event, const QVariant &details)
 {
     Q_UNUSED(details)
     event->accept();
 }
 
 /*!
   Emits the \ref clicked signal if the cursor hasn't moved by more than a few pixels since the \ref
   mousePressEvent.
 
   \seebaseclassmethod
 */
 void QCPTextElement::mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos)
 {
     if ((QPointF(event->pos()) - startPos).manhattanLength() <= 3)
         emit clicked(event);
 }
 
 /*!
   Emits the \ref doubleClicked signal.
 
   \seebaseclassmethod
 */
 void QCPTextElement::mouseDoubleClickEvent(QMouseEvent *event, const QVariant &details)
 {
     Q_UNUSED(details)
     emit doubleClicked(event);
 }
 
 /*! \internal
 
   Returns the main font to be used. This is mSelectedFont if \ref setSelected is set to
   <tt>true</tt>, else mFont is returned.
 */
 QFont QCPTextElement::mainFont() const
 {
     return mSelected ? mSelectedFont : mFont;
 }
 
 /*! \internal
 
   Returns the main color to be used. This is mSelectedTextColor if \ref setSelected is set to
   <tt>true</tt>, else mTextColor is returned.
 */
 QColor QCPTextElement::mainTextColor() const
 {
     return mSelected ? mSelectedTextColor : mTextColor;
 }
 /* end of 'src/layoutelements/layoutelement-textelement.cpp' */
 
 /* including file 'src/layoutelements/layoutelement-colorscale.cpp', size 25910 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200    */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPColorScale
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPColorScale
   \brief A color scale for use with color coding data such as QCPColorMap
 
   This layout element can be placed on the plot to correlate a color gradient with data values. It
   is usually used in combination with one or multiple \ref QCPColorMap "QCPColorMaps".
 
   \image html QCPColorScale.png
 
   The color scale can be either horizontal or vertical, as shown in the image above. The
   orientation and the side where the numbers appear is controlled with \ref setType.
 
   Use \ref QCPColorMap::setColorScale to connect a color map with a color scale. Once they are
   connected, they share their gradient, data range and data scale type (\ref setGradient, \ref
   setDataRange, \ref setDataScaleType). Multiple color maps may be associated with a single color
   scale, to make them all synchronize these properties.
 
   To have finer control over the number display and axis behaviour, you can directly access the
   \ref axis. See the documentation of QCPAxis for details about configuring axes. For example, if
   you want to change the number of automatically generated ticks, call
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcolorscale-tickcount
 
   Placing a color scale next to the main axis rect works like with any other layout element:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcolorscale-creation
   In this case we have placed it to the right of the default axis rect, so it wasn't necessary to
   call \ref setType, since \ref QCPAxis::atRight is already the default. The text next to the color
   scale can be set with \ref setLabel.
 
   For optimum appearance (like in the image above), it may be desirable to line up the axis rect and
   the borders of the color scale. Use a \ref QCPMarginGroup to achieve this:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcolorscale-margingroup
 
   Color scales are initialized with a non-zero minimum top and bottom margin (\ref
   setMinimumMargins), because vertical color scales are most common and the minimum top/bottom
   margin makes sure it keeps some distance to the top/bottom widget border. So if you change to a
   horizontal color scale by setting \ref setType to \ref QCPAxis::atBottom or \ref QCPAxis::atTop, you
   might want to also change the minimum margins accordingly, e.g. <tt>setMinimumMargins(QMargins(6, 0, 6, 0))</tt>.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QCPAxis *QCPColorScale::axis() const
 
   Returns the internal \ref QCPAxis instance of this color scale. You can access it to alter the
   appearance and behaviour of the axis. \ref QCPColorScale duplicates some properties in its
   interface for convenience. Those are \ref setDataRange (\ref QCPAxis::setRange), \ref
   setDataScaleType (\ref QCPAxis::setScaleType), and the method \ref setLabel (\ref
   QCPAxis::setLabel). As they each are connected, it does not matter whether you use the method on
   the QCPColorScale or on its QCPAxis.
 
   If the type of the color scale is changed with \ref setType, the axis returned by this method
   will change, too, to either the left, right, bottom or top axis, depending on which type was set.
 */
 
 /* end documentation of signals */
 /* start documentation of signals */
 
 /*! \fn void QCPColorScale::dataRangeChanged(const QCPRange &newRange);
 
   This signal is emitted when the data range changes.
 
   \see setDataRange
 */
 
 /*! \fn void QCPColorScale::dataScaleTypeChanged(QCPAxis::ScaleType scaleType);
 
   This signal is emitted when the data scale type changes.
 
   \see setDataScaleType
 */
 
 /*! \fn void QCPColorScale::gradientChanged(const QCPColorGradient &newGradient);
 
   This signal is emitted when the gradient changes.
 
   \see setGradient
 */
 
 /* end documentation of signals */
 
 /*!
   Constructs a new QCPColorScale.
 */
 QCPColorScale::QCPColorScale(QCustomPlot *parentPlot)
     : QCPLayoutElement(parentPlot),
       mType(
           QCPAxis::
               atTop), // set to atTop such that setType(QCPAxis::atRight) below doesn't skip work because it thinks it's already atRight
       mDataScaleType(QCPAxis::stLinear), mBarWidth(20), mAxisRect(new QCPColorScaleAxisRectPrivate(this))
 {
     setMinimumMargins(QMargins(
         0, 6, 0,
         6)); // for default right color scale types, keep some room at bottom and top (important if no margin group is used)
     setType(QCPAxis::atRight);
     setDataRange(QCPRange(0, 6));
 }
 
 QCPColorScale::~QCPColorScale()
 {
     delete mAxisRect;
 }
 
 /* undocumented getter */
 QString QCPColorScale::label() const
 {
     if (!mColorAxis)
     {
         qDebug() << Q_FUNC_INFO << "internal color axis undefined";
         return QString();
     }
 
     return mColorAxis.data()->label();
 }
 
 /* undocumented getter */
 bool QCPColorScale::rangeDrag() const
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return false;
     }
 
     return mAxisRect.data()->rangeDrag().testFlag(QCPAxis::orientation(mType)) &&
            mAxisRect.data()->rangeDragAxis(QCPAxis::orientation(mType)) &&
            mAxisRect.data()->rangeDragAxis(QCPAxis::orientation(mType))->orientation() == QCPAxis::orientation(mType);
 }
 
 /* undocumented getter */
 bool QCPColorScale::rangeZoom() const
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return false;
     }
 
     return mAxisRect.data()->rangeZoom().testFlag(QCPAxis::orientation(mType)) &&
            mAxisRect.data()->rangeZoomAxis(QCPAxis::orientation(mType)) &&
            mAxisRect.data()->rangeZoomAxis(QCPAxis::orientation(mType))->orientation() == QCPAxis::orientation(mType);
 }
 
 /*!
   Sets at which side of the color scale the axis is placed, and thus also its orientation.
 
   Note that after setting \a type to a different value, the axis returned by \ref axis() will
   be a different one. The new axis will adopt the following properties from the previous axis: The
   range, scale type, label and ticker (the latter will be shared and not copied).
 */
 void QCPColorScale::setType(QCPAxis::AxisType type)
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
     if (mType != type)
     {
         mType = type;
         QCPRange rangeTransfer(0, 6);
         QString labelTransfer;
         QSharedPointer<QCPAxisTicker> tickerTransfer;
         // transfer/revert some settings on old axis if it exists:
         bool doTransfer = (bool)mColorAxis;
         if (doTransfer)
         {
             rangeTransfer  = mColorAxis.data()->range();
             labelTransfer  = mColorAxis.data()->label();
             tickerTransfer = mColorAxis.data()->ticker();
             mColorAxis.data()->setLabel(QString());
             disconnect(mColorAxis.data(), SIGNAL(rangeChanged(QCPRange)), this, SLOT(setDataRange(QCPRange)));
             disconnect(mColorAxis.data(), SIGNAL(scaleTypeChanged(QCPAxis::ScaleType)), this,
                        SLOT(setDataScaleType(QCPAxis::ScaleType)));
         }
         QList<QCPAxis::AxisType> allAxisTypes = QList<QCPAxis::AxisType>() << QCPAxis::atLeft << QCPAxis::atRight
                                                                            << QCPAxis::atBottom << QCPAxis::atTop;
         foreach (QCPAxis::AxisType atype, allAxisTypes)
         {
             mAxisRect.data()->axis(atype)->setTicks(atype == mType);
             mAxisRect.data()->axis(atype)->setTickLabels(atype == mType);
         }
         // set new mColorAxis pointer:
         mColorAxis = mAxisRect.data()->axis(mType);
         // transfer settings to new axis:
         if (doTransfer)
         {
             mColorAxis.data()->setRange(
                 rangeTransfer); // range transfer necessary if axis changes from vertical to horizontal or vice versa (axes with same orientation are synchronized via signals)
             mColorAxis.data()->setLabel(labelTransfer);
             mColorAxis.data()->setTicker(tickerTransfer);
         }
         connect(mColorAxis.data(), SIGNAL(rangeChanged(QCPRange)), this, SLOT(setDataRange(QCPRange)));
         connect(mColorAxis.data(), SIGNAL(scaleTypeChanged(QCPAxis::ScaleType)), this,
                 SLOT(setDataScaleType(QCPAxis::ScaleType)));
         mAxisRect.data()->setRangeDragAxes(QList<QCPAxis *>() << mColorAxis.data());
     }
 }
 
 /*!
   Sets the range spanned by the color gradient and that is shown by the axis in the color scale.
 
   It is equivalent to calling QCPColorMap::setDataRange on any of the connected color maps. It is
   also equivalent to directly accessing the \ref axis and setting its range with \ref
   QCPAxis::setRange.
 
   \see setDataScaleType, setGradient, rescaleDataRange
 */
 void QCPColorScale::setDataRange(const QCPRange &dataRange)
 {
     if (mDataRange.lower != dataRange.lower || mDataRange.upper != dataRange.upper)
     {
         mDataRange = dataRange;
         if (mColorAxis)
             mColorAxis.data()->setRange(mDataRange);
         emit dataRangeChanged(mDataRange);
     }
 }
 
 /*!
   Sets the scale type of the color scale, i.e. whether values are linearly associated with colors
   or logarithmically.
 
   It is equivalent to calling QCPColorMap::setDataScaleType on any of the connected color maps. It is
   also equivalent to directly accessing the \ref axis and setting its scale type with \ref
   QCPAxis::setScaleType.
 
   \see setDataRange, setGradient
 */
 void QCPColorScale::setDataScaleType(QCPAxis::ScaleType scaleType)
 {
     if (mDataScaleType != scaleType)
     {
         mDataScaleType = scaleType;
         if (mColorAxis)
             mColorAxis.data()->setScaleType(mDataScaleType);
         if (mDataScaleType == QCPAxis::stLogarithmic)
             setDataRange(mDataRange.sanitizedForLogScale());
         emit dataScaleTypeChanged(mDataScaleType);
     }
 }
 
 /*!
   Sets the color gradient that will be used to represent data values.
 
   It is equivalent to calling QCPColorMap::setGradient on any of the connected color maps.
 
   \see setDataRange, setDataScaleType
 */
 void QCPColorScale::setGradient(const QCPColorGradient &gradient)
 {
     if (mGradient != gradient)
     {
         mGradient = gradient;
         if (mAxisRect)
             mAxisRect.data()->mGradientImageInvalidated = true;
         emit gradientChanged(mGradient);
     }
 }
 
 /*!
   Sets the axis label of the color scale. This is equivalent to calling \ref QCPAxis::setLabel on
   the internal \ref axis.
 */
 void QCPColorScale::setLabel(const QString &str)
 {
     if (!mColorAxis)
     {
         qDebug() << Q_FUNC_INFO << "internal color axis undefined";
         return;
     }
 
     mColorAxis.data()->setLabel(str);
 }
 
 /*!
   Sets the width (or height, for horizontal color scales) the bar where the gradient is displayed
   will have.
 */
 void QCPColorScale::setBarWidth(int width)
 {
     mBarWidth = width;
 }
 
 /*!
   Sets whether the user can drag the data range (\ref setDataRange).
 
   Note that \ref QCP::iRangeDrag must be in the QCustomPlot's interactions (\ref
   QCustomPlot::setInteractions) to allow range dragging.
 */
 void QCPColorScale::setRangeDrag(bool enabled)
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
 
     if (enabled)
         mAxisRect.data()->setRangeDrag(QCPAxis::orientation(mType));
     else
-        mAxisRect.data()->setRangeDrag(0);
+        mAxisRect.data()->setRangeDrag(nullptr);
 }
 
 /*!
   Sets whether the user can zoom the data range (\ref setDataRange) by scrolling the mouse wheel.
 
   Note that \ref QCP::iRangeZoom must be in the QCustomPlot's interactions (\ref
   QCustomPlot::setInteractions) to allow range dragging.
 */
 void QCPColorScale::setRangeZoom(bool enabled)
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
 
     if (enabled)
         mAxisRect.data()->setRangeZoom(QCPAxis::orientation(mType));
     else
-        mAxisRect.data()->setRangeZoom(0);
+        mAxisRect.data()->setRangeZoom(nullptr);
 }
 
 /*!
   Returns a list of all the color maps associated with this color scale.
 */
 QList<QCPColorMap *> QCPColorScale::colorMaps() const
 {
     QList<QCPColorMap *> result;
     for (int i = 0; i < mParentPlot->plottableCount(); ++i)
     {
         if (QCPColorMap *cm = qobject_cast<QCPColorMap *>(mParentPlot->plottable(i)))
             if (cm->colorScale() == this)
                 result.append(cm);
     }
     return result;
 }
 
 /*!
   Changes the data range such that all color maps associated with this color scale are fully mapped
   to the gradient in the data dimension.
 
   \see setDataRange
 */
 void QCPColorScale::rescaleDataRange(bool onlyVisibleMaps)
 {
     QList<QCPColorMap *> maps = colorMaps();
     QCPRange newRange;
     bool haveRange       = false;
     QCP::SignDomain sign = QCP::sdBoth;
     if (mDataScaleType == QCPAxis::stLogarithmic)
         sign = (mDataRange.upper < 0 ? QCP::sdNegative : QCP::sdPositive);
     for (int i = 0; i < maps.size(); ++i)
     {
         if (!maps.at(i)->realVisibility() && onlyVisibleMaps)
             continue;
         QCPRange mapRange;
         if (maps.at(i)->colorScale() == this)
         {
             bool currentFoundRange = true;
             mapRange               = maps.at(i)->data()->dataBounds();
             if (sign == QCP::sdPositive)
             {
                 if (mapRange.lower <= 0 && mapRange.upper > 0)
                     mapRange.lower = mapRange.upper * 1e-3;
                 else if (mapRange.lower <= 0 && mapRange.upper <= 0)
                     currentFoundRange = false;
             }
             else if (sign == QCP::sdNegative)
             {
                 if (mapRange.upper >= 0 && mapRange.lower < 0)
                     mapRange.upper = mapRange.lower * 1e-3;
                 else if (mapRange.upper >= 0 && mapRange.lower >= 0)
                     currentFoundRange = false;
             }
             if (currentFoundRange)
             {
                 if (!haveRange)
                     newRange = mapRange;
                 else
                     newRange.expand(mapRange);
                 haveRange = true;
             }
         }
     }
     if (haveRange)
     {
         if (!QCPRange::validRange(
                 newRange)) // likely due to range being zero (plottable has only constant data in this dimension), shift current range to at least center the data
         {
             double center =
                 (newRange.lower + newRange.upper) *
                 0.5; // upper and lower should be equal anyway, but just to make sure, incase validRange returned false for other reason
             if (mDataScaleType == QCPAxis::stLinear)
             {
                 newRange.lower = center - mDataRange.size() / 2.0;
                 newRange.upper = center + mDataRange.size() / 2.0;
             }
             else // mScaleType == stLogarithmic
             {
                 newRange.lower = center / qSqrt(mDataRange.upper / mDataRange.lower);
                 newRange.upper = center * qSqrt(mDataRange.upper / mDataRange.lower);
             }
         }
         setDataRange(newRange);
     }
 }
 
 /* inherits documentation from base class */
 void QCPColorScale::update(UpdatePhase phase)
 {
     QCPLayoutElement::update(phase);
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
 
     mAxisRect.data()->update(phase);
 
     switch (phase)
     {
         case upMargins:
         {
             if (mType == QCPAxis::atBottom || mType == QCPAxis::atTop)
             {
                 setMaximumSize(QWIDGETSIZE_MAX, mBarWidth + mAxisRect.data()->margins().top() +
                                                     mAxisRect.data()->margins().bottom() + margins().top() +
                                                     margins().bottom());
                 setMinimumSize(0, mBarWidth + mAxisRect.data()->margins().top() + mAxisRect.data()->margins().bottom() +
                                       margins().top() + margins().bottom());
             }
             else
             {
                 setMaximumSize(mBarWidth + mAxisRect.data()->margins().left() + mAxisRect.data()->margins().right() +
                                    margins().left() + margins().right(),
                                QWIDGETSIZE_MAX);
                 setMinimumSize(mBarWidth + mAxisRect.data()->margins().left() + mAxisRect.data()->margins().right() +
                                    margins().left() + margins().right(),
                                0);
             }
             break;
         }
         case upLayout:
         {
             mAxisRect.data()->setOuterRect(rect());
             break;
         }
         default:
             break;
     }
 }
 
 /* inherits documentation from base class */
 void QCPColorScale::applyDefaultAntialiasingHint(QCPPainter *painter) const
 {
     painter->setAntialiasing(false);
 }
 
 /* inherits documentation from base class */
 void QCPColorScale::mousePressEvent(QMouseEvent *event, const QVariant &details)
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
     mAxisRect.data()->mousePressEvent(event, details);
 }
 
 /* inherits documentation from base class */
 void QCPColorScale::mouseMoveEvent(QMouseEvent *event, const QPointF &startPos)
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
     mAxisRect.data()->mouseMoveEvent(event, startPos);
 }
 
 /* inherits documentation from base class */
 void QCPColorScale::mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos)
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
     mAxisRect.data()->mouseReleaseEvent(event, startPos);
 }
 
 /* inherits documentation from base class */
 void QCPColorScale::wheelEvent(QWheelEvent *event)
 {
     if (!mAxisRect)
     {
         qDebug() << Q_FUNC_INFO << "internal axis rect was deleted";
         return;
     }
     mAxisRect.data()->wheelEvent(event);
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPColorScaleAxisRectPrivate
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPColorScaleAxisRectPrivate
 
   \internal
   \brief An axis rect subclass for use in a QCPColorScale
 
   This is a private class and not part of the public QCustomPlot interface.
 
   It provides the axis rect functionality for the QCPColorScale class.
 */
 
 /*!
   Creates a new instance, as a child of \a parentColorScale.
 */
 QCPColorScaleAxisRectPrivate::QCPColorScaleAxisRectPrivate(QCPColorScale *parentColorScale)
     : QCPAxisRect(parentColorScale->parentPlot(), true), mParentColorScale(parentColorScale),
       mGradientImageInvalidated(true)
 {
     setParentLayerable(parentColorScale);
     setMinimumMargins(QMargins(0, 0, 0, 0));
     QList<QCPAxis::AxisType> allAxisTypes = QList<QCPAxis::AxisType>() << QCPAxis::atBottom << QCPAxis::atTop
                                                                        << QCPAxis::atLeft << QCPAxis::atRight;
     foreach (QCPAxis::AxisType type, allAxisTypes)
     {
         axis(type)->setVisible(true);
         axis(type)->grid()->setVisible(false);
         axis(type)->setPadding(0);
         connect(axis(type), SIGNAL(selectionChanged(QCPAxis::SelectableParts)), this,
                 SLOT(axisSelectionChanged(QCPAxis::SelectableParts)));
         connect(axis(type), SIGNAL(selectableChanged(QCPAxis::SelectableParts)), this,
                 SLOT(axisSelectableChanged(QCPAxis::SelectableParts)));
     }
 
     connect(axis(QCPAxis::atLeft), SIGNAL(rangeChanged(QCPRange)), axis(QCPAxis::atRight), SLOT(setRange(QCPRange)));
     connect(axis(QCPAxis::atRight), SIGNAL(rangeChanged(QCPRange)), axis(QCPAxis::atLeft), SLOT(setRange(QCPRange)));
     connect(axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), axis(QCPAxis::atTop), SLOT(setRange(QCPRange)));
     connect(axis(QCPAxis::atTop), SIGNAL(rangeChanged(QCPRange)), axis(QCPAxis::atBottom), SLOT(setRange(QCPRange)));
     connect(axis(QCPAxis::atLeft), SIGNAL(scaleTypeChanged(QCPAxis::ScaleType)), axis(QCPAxis::atRight),
             SLOT(setScaleType(QCPAxis::ScaleType)));
     connect(axis(QCPAxis::atRight), SIGNAL(scaleTypeChanged(QCPAxis::ScaleType)), axis(QCPAxis::atLeft),
             SLOT(setScaleType(QCPAxis::ScaleType)));
     connect(axis(QCPAxis::atBottom), SIGNAL(scaleTypeChanged(QCPAxis::ScaleType)), axis(QCPAxis::atTop),
             SLOT(setScaleType(QCPAxis::ScaleType)));
     connect(axis(QCPAxis::atTop), SIGNAL(scaleTypeChanged(QCPAxis::ScaleType)), axis(QCPAxis::atBottom),
             SLOT(setScaleType(QCPAxis::ScaleType)));
 
     // make layer transfers of color scale transfer to axis rect and axes
     // the axes must be set after axis rect, such that they appear above color gradient drawn by axis rect:
     connect(parentColorScale, SIGNAL(layerChanged(QCPLayer *)), this, SLOT(setLayer(QCPLayer *)));
     foreach (QCPAxis::AxisType type, allAxisTypes)
         connect(parentColorScale, SIGNAL(layerChanged(QCPLayer *)), axis(type), SLOT(setLayer(QCPLayer *)));
 }
 
 /*! \internal
 
   Updates the color gradient image if necessary, by calling \ref updateGradientImage, then draws
   it. Then the axes are drawn by calling the \ref QCPAxisRect::draw base class implementation.
 
   \seebaseclassmethod
 */
 void QCPColorScaleAxisRectPrivate::draw(QCPPainter *painter)
 {
     if (mGradientImageInvalidated)
         updateGradientImage();
 
     bool mirrorHorz = false;
     bool mirrorVert = false;
     if (mParentColorScale->mColorAxis)
     {
         mirrorHorz = mParentColorScale->mColorAxis.data()->rangeReversed() &&
                      (mParentColorScale->type() == QCPAxis::atBottom || mParentColorScale->type() == QCPAxis::atTop);
         mirrorVert = mParentColorScale->mColorAxis.data()->rangeReversed() &&
                      (mParentColorScale->type() == QCPAxis::atLeft || mParentColorScale->type() == QCPAxis::atRight);
     }
 
     painter->drawImage(rect().adjusted(0, -1, 0, -1), mGradientImage.mirrored(mirrorHorz, mirrorVert));
     QCPAxisRect::draw(painter);
 }
 
 /*! \internal
 
   Uses the current gradient of the parent \ref QCPColorScale (specified in the constructor) to
   generate a gradient image. This gradient image will be used in the \ref draw method.
 */
 void QCPColorScaleAxisRectPrivate::updateGradientImage()
 {
     if (rect().isEmpty())
         return;
 
     const QImage::Format format = QImage::Format_ARGB32_Premultiplied;
     int n                       = mParentColorScale->mGradient.levelCount();
     int w, h;
     QVector<double> data(n);
     for (int i = 0; i < n; ++i)
         data[i] = i;
     if (mParentColorScale->mType == QCPAxis::atBottom || mParentColorScale->mType == QCPAxis::atTop)
     {
         w              = n;
         h              = rect().height();
         mGradientImage = QImage(w, h, format);
         QVector<QRgb *> pixels;
         for (int y = 0; y < h; ++y)
             pixels.append(reinterpret_cast<QRgb *>(mGradientImage.scanLine(y)));
         mParentColorScale->mGradient.colorize(data.constData(), QCPRange(0, n - 1), pixels.first(), n);
         for (int y = 1; y < h; ++y)
             memcpy(pixels.at(y), pixels.first(), n * sizeof(QRgb));
     }
     else
     {
         w              = rect().width();
         h              = n;
         mGradientImage = QImage(w, h, format);
         for (int y = 0; y < h; ++y)
         {
             QRgb *pixels         = reinterpret_cast<QRgb *>(mGradientImage.scanLine(y));
             const QRgb lineColor = mParentColorScale->mGradient.color(data[h - 1 - y], QCPRange(0, n - 1));
             for (int x = 0; x < w; ++x)
                 pixels[x] = lineColor;
         }
     }
     mGradientImageInvalidated = false;
 }
 
 /*! \internal
 
   This slot is connected to the selectionChanged signals of the four axes in the constructor. It
   synchronizes the selection state of the axes.
 */
 void QCPColorScaleAxisRectPrivate::axisSelectionChanged(QCPAxis::SelectableParts selectedParts)
 {
     // axis bases of four axes shall always (de-)selected synchronously:
     QList<QCPAxis::AxisType> allAxisTypes = QList<QCPAxis::AxisType>() << QCPAxis::atBottom << QCPAxis::atTop
                                                                        << QCPAxis::atLeft << QCPAxis::atRight;
     foreach (QCPAxis::AxisType type, allAxisTypes)
     {
         if (QCPAxis *senderAxis = qobject_cast<QCPAxis *>(sender()))
             if (senderAxis->axisType() == type)
                 continue;
 
         if (axis(type)->selectableParts().testFlag(QCPAxis::spAxis))
         {
             if (selectedParts.testFlag(QCPAxis::spAxis))
                 axis(type)->setSelectedParts(axis(type)->selectedParts() | QCPAxis::spAxis);
             else
                 axis(type)->setSelectedParts(axis(type)->selectedParts() & ~QCPAxis::spAxis);
         }
     }
 }
 
 /*! \internal
 
   This slot is connected to the selectableChanged signals of the four axes in the constructor. It
   synchronizes the selectability of the axes.
 */
 void QCPColorScaleAxisRectPrivate::axisSelectableChanged(QCPAxis::SelectableParts selectableParts)
 {
     // synchronize axis base selectability:
     QList<QCPAxis::AxisType> allAxisTypes = QList<QCPAxis::AxisType>() << QCPAxis::atBottom << QCPAxis::atTop
                                                                        << QCPAxis::atLeft << QCPAxis::atRight;
     foreach (QCPAxis::AxisType type, allAxisTypes)
     {
         if (QCPAxis *senderAxis = qobject_cast<QCPAxis *>(sender()))
             if (senderAxis->axisType() == type)
                 continue;
 
         if (axis(type)->selectableParts().testFlag(QCPAxis::spAxis))
         {
             if (selectableParts.testFlag(QCPAxis::spAxis))
                 axis(type)->setSelectableParts(axis(type)->selectableParts() | QCPAxis::spAxis);
             else
                 axis(type)->setSelectableParts(axis(type)->selectableParts() & ~QCPAxis::spAxis);
         }
     }
 }
 /* end of 'src/layoutelements/layoutelement-colorscale.cpp' */
 
 /* including file 'src/plottables/plottable-graph.cpp', size 72363           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPGraphData
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPGraphData
   \brief Holds the data of one single data point for QCPGraph.
 
   The stored data is:
   \li \a key: coordinate on the key axis of this data point (this is the \a mainKey and the \a sortKey)
   \li \a value: coordinate on the value axis of this data point (this is the \a mainValue)
 
   The container for storing multiple data points is \ref QCPGraphDataContainer. It is a typedef for
   \ref QCPDataContainer with \ref QCPGraphData as the DataType template parameter. See the
   documentation there for an explanation regarding the data type's generic methods.
 
   \see QCPGraphDataContainer
 */
 
 /* start documentation of inline functions */
 
 /*! \fn double QCPGraphData::sortKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static QCPGraphData QCPGraphData::fromSortKey(double sortKey)
 
   Returns a data point with the specified \a sortKey. All other members are set to zero.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static static bool QCPGraphData::sortKeyIsMainKey()
 
   Since the member \a key is both the data point key coordinate and the data ordering parameter,
   this method returns true.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPGraphData::mainKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPGraphData::mainValue() const
 
   Returns the \a value member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn QCPRange QCPGraphData::valueRange() const
 
   Returns a QCPRange with both lower and upper boundary set to \a value of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Constructs a data point with key and value set to zero.
 */
 QCPGraphData::QCPGraphData() : key(0), value(0)
 {
 }
 
 /*!
   Constructs a data point with the specified \a key and \a value.
 */
 QCPGraphData::QCPGraphData(double key, double value) : key(key), value(value)
 {
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPGraph
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPGraph
   \brief A plottable representing a graph in a plot.
 
   \image html QCPGraph.png
 
   Usually you create new graphs by calling QCustomPlot::addGraph. The resulting instance can be
   accessed via QCustomPlot::graph.
 
   To plot data, assign it with the \ref setData or \ref addData functions. Alternatively, you can
   also access and modify the data via the \ref data method, which returns a pointer to the internal
   \ref QCPGraphDataContainer.
 
   Graphs are used to display single-valued data. Single-valued means that there should only be one
   data point per unique key coordinate. In other words, the graph can't have \a loops. If you do
   want to plot non-single-valued curves, rather use the QCPCurve plottable.
 
   Gaps in the graph line can be created by adding data points with NaN as value
   (<tt>qQNaN()</tt> or <tt>std::numeric_limits<double>::quiet_NaN()</tt>) in between the two data points that shall be
   separated.
 
   \section qcpgraph-appearance Changing the appearance
 
   The appearance of the graph is mainly determined by the line style, scatter style, brush and pen
   of the graph (\ref setLineStyle, \ref setScatterStyle, \ref setBrush, \ref setPen).
 
   \subsection filling Filling under or between graphs
 
   QCPGraph knows two types of fills: Normal graph fills towards the zero-value-line parallel to
   the key axis of the graph, and fills between two graphs, called channel fills. To enable a fill,
   just set a brush with \ref setBrush which is neither Qt::NoBrush nor fully transparent.
 
   By default, a normal fill towards the zero-value-line will be drawn. To set up a channel fill
   between this graph and another one, call \ref setChannelFillGraph with the other graph as
   parameter.
 
   \see QCustomPlot::addGraph, QCustomPlot::graph
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QSharedPointer<QCPGraphDataContainer> QCPGraph::data() const
 
   Returns a shared pointer to the internal data storage of type \ref QCPGraphDataContainer. You may
   use it to directly manipulate the data, which may be more convenient and faster than using the
   regular \ref setData or \ref addData methods.
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs a graph which uses \a keyAxis as its key axis ("x") and \a valueAxis as its value
   axis ("y"). \a keyAxis and \a valueAxis must reside in the same QCustomPlot instance and not have
   the same orientation. If either of these restrictions is violated, a corresponding message is
   printed to the debug output (qDebug), the construction is not aborted, though.
 
   The created QCPGraph is automatically registered with the QCustomPlot instance inferred from \a
   keyAxis. This QCustomPlot instance takes ownership of the QCPGraph, so do not delete it manually
   but use QCustomPlot::removePlottable() instead.
 
   To directly create a graph inside a plot, you can also use the simpler QCustomPlot::addGraph function.
 */
 QCPGraph::QCPGraph(QCPAxis *keyAxis, QCPAxis *valueAxis) : QCPAbstractPlottable1D<QCPGraphData>(keyAxis, valueAxis)
 {
     // special handling for QCPGraphs to maintain the simple graph interface:
     mParentPlot->registerGraph(this);
 
     setPen(QPen(Qt::blue, 0));
     setBrush(Qt::NoBrush);
 
     setLineStyle(lsLine);
     setScatterSkip(0);
-    setChannelFillGraph(0);
+    setChannelFillGraph(nullptr);
     setAdaptiveSampling(true);
 }
 
 QCPGraph::~QCPGraph()
 {
 }
 
 /*! \overload
 
   Replaces the current data container with the provided \a data container.
 
   Since a QSharedPointer is used, multiple QCPGraphs may share the same data container safely.
   Modifying the data in the container will then affect all graphs that share the container. Sharing
   can be achieved by simply exchanging the data containers wrapped in shared pointers:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpgraph-datasharing-1
 
   If you do not wish to share containers, but create a copy from an existing container, rather use
   the \ref QCPDataContainer<DataType>::set method on the graph's data container directly:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpgraph-datasharing-2
 
   \see addData
 */
 void QCPGraph::setData(QSharedPointer<QCPGraphDataContainer> data)
 {
     mDataContainer = data;
 }
 
 /*! \overload
 
   Replaces the current data with the provided points in \a keys and \a values. The provided
   vectors should have equal length. Else, the number of added points will be the size of the
   smallest vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   \see addData
 */
 void QCPGraph::setData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted)
 {
     mDataContainer->clear();
     addData(keys, values, alreadySorted);
 }
 
 /*!
   Sets how the single data points are connected in the plot. For scatter-only plots, set \a ls to
   \ref lsNone and \ref setScatterStyle to the desired scatter style.
 
   \see setScatterStyle
 */
 void QCPGraph::setLineStyle(LineStyle ls)
 {
     mLineStyle = ls;
 }
 
 /*!
   Sets the visual appearance of single data points in the plot. If set to \ref QCPScatterStyle::ssNone, no scatter points
   are drawn (e.g. for line-only-plots with appropriate line style).
 
   \see QCPScatterStyle, setLineStyle
 */
 void QCPGraph::setScatterStyle(const QCPScatterStyle &style)
 {
     mScatterStyle = style;
 }
 
 /*!
   If scatters are displayed (scatter style not \ref QCPScatterStyle::ssNone), \a skip number of
   scatter points are skipped/not drawn after every drawn scatter point.
 
   This can be used to make the data appear sparser while for example still having a smooth line,
   and to improve performance for very high density plots.
 
   If \a skip is set to 0 (default), all scatter points are drawn.
 
   \see setScatterStyle
 */
 void QCPGraph::setScatterSkip(int skip)
 {
     mScatterSkip = qMax(0, skip);
 }
 
 /*!
   Sets the target graph for filling the area between this graph and \a targetGraph with the current
   brush (\ref setBrush).
 
   When \a targetGraph is set to 0, a normal graph fill to the zero-value-line will be shown. To
   disable any filling, set the brush to Qt::NoBrush.
 
   \see setBrush
 */
 void QCPGraph::setChannelFillGraph(QCPGraph *targetGraph)
 {
     // prevent setting channel target to this graph itself:
     if (targetGraph == this)
     {
         qDebug() << Q_FUNC_INFO << "targetGraph is this graph itself";
-        mChannelFillGraph = 0;
+        mChannelFillGraph = nullptr;
         return;
     }
     // prevent setting channel target to a graph not in the plot:
     if (targetGraph && targetGraph->mParentPlot != mParentPlot)
     {
         qDebug() << Q_FUNC_INFO << "targetGraph not in same plot";
-        mChannelFillGraph = 0;
+        mChannelFillGraph = nullptr;
         return;
     }
 
     mChannelFillGraph = targetGraph;
 }
 
 /*!
   Sets whether adaptive sampling shall be used when plotting this graph. QCustomPlot's adaptive
   sampling technique can drastically improve the replot performance for graphs with a larger number
   of points (e.g. above 10,000), without notably changing the appearance of the graph.
 
   By default, adaptive sampling is enabled. Even if enabled, QCustomPlot decides whether adaptive
   sampling shall actually be used on a per-graph basis. So leaving adaptive sampling enabled has no
   disadvantage in almost all cases.
 
   \image html adaptive-sampling-line.png "A line plot of 500,000 points without and with adaptive sampling"
 
   As can be seen, line plots experience no visual degradation from adaptive sampling. Outliers are
   reproduced reliably, as well as the overall shape of the data set. The replot time reduces
   dramatically though. This allows QCustomPlot to display large amounts of data in realtime.
 
   \image html adaptive-sampling-scatter.png "A scatter plot of 100,000 points without and with adaptive sampling"
 
   Care must be taken when using high-density scatter plots in combination with adaptive sampling.
   The adaptive sampling algorithm treats scatter plots more carefully than line plots which still
   gives a significant reduction of replot times, but not quite as much as for line plots. This is
   because scatter plots inherently need more data points to be preserved in order to still resemble
   the original, non-adaptive-sampling plot. As shown above, the results still aren't quite
   identical, as banding occurs for the outer data points. This is in fact intentional, such that
   the boundaries of the data cloud stay visible to the viewer. How strong the banding appears,
   depends on the point density, i.e. the number of points in the plot.
 
   For some situations with scatter plots it might thus be desirable to manually turn adaptive
   sampling off. For example, when saving the plot to disk. This can be achieved by setting \a
   enabled to false before issuing a command like \ref QCustomPlot::savePng, and setting \a enabled
   back to true afterwards.
 */
 void QCPGraph::setAdaptiveSampling(bool enabled)
 {
     mAdaptiveSampling = enabled;
 }
 
 /*! \overload
 
   Adds the provided points in \a keys and \a values to the current data. The provided vectors
   should have equal length. Else, the number of added points will be the size of the smallest
   vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPGraph::addData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted)
 {
     if (keys.size() != values.size())
         qDebug() << Q_FUNC_INFO << "keys and values have different sizes:" << keys.size() << values.size();
     const int n = qMin(keys.size(), values.size());
     QVector<QCPGraphData> tempData(n);
     QVector<QCPGraphData>::iterator it          = tempData.begin();
     const QVector<QCPGraphData>::iterator itEnd = tempData.end();
     int i                                       = 0;
     while (it != itEnd)
     {
         it->key   = keys[i];
         it->value = values[i];
         ++it;
         ++i;
     }
     mDataContainer->add(tempData, alreadySorted); // don't modify tempData beyond this to prevent copy on write
 }
 
 /*! \overload
 
   Adds the provided data point as \a key and \a value to the current data.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPGraph::addData(double key, double value)
 {
     mDataContainer->add(QCPGraphData(key, value));
 }
 
 /* inherits documentation from base class */
 double QCPGraph::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     if (mKeyAxis.data()->axisRect()->rect().contains(pos.toPoint()))
     {
         QCPGraphDataContainer::const_iterator closestDataPoint = mDataContainer->constEnd();
         double result                                          = pointDistance(pos, closestDataPoint);
         if (details)
         {
             int pointIndex = closestDataPoint - mDataContainer->constBegin();
             details->setValue(QCPDataSelection(QCPDataRange(pointIndex, pointIndex + 1)));
         }
         return result;
     }
     else
         return -1;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPGraph::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const
 {
     return mDataContainer->keyRange(foundRange, inSignDomain);
 }
 
 /* inherits documentation from base class */
 QCPRange QCPGraph::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain, const QCPRange &inKeyRange) const
 {
     return mDataContainer->valueRange(foundRange, inSignDomain, inKeyRange);
 }
 
 /* inherits documentation from base class */
 void QCPGraph::draw(QCPPainter *painter)
 {
     if (!mKeyAxis || !mValueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
     if (mKeyAxis.data()->range().size() <= 0 || mDataContainer->isEmpty())
         return;
     if (mLineStyle == lsNone && mScatterStyle.isNone())
         return;
 
     QVector<QPointF> lines,
         scatters; // line and (if necessary) scatter pixel coordinates will be stored here while iterating over segments
 
     // loop over and draw segments of unselected/selected data:
     QList<QCPDataRange> selectedSegments, unselectedSegments, allSegments;
     getDataSegments(selectedSegments, unselectedSegments);
     allSegments << unselectedSegments << selectedSegments;
     for (int i = 0; i < allSegments.size(); ++i)
     {
         bool isSelectedSegment = i >= unselectedSegments.size();
         // get line pixel points appropriate to line style:
         QCPDataRange lineDataRange =
             isSelectedSegment ?
                 allSegments.at(i) :
                 allSegments.at(i).adjusted(
                     -1,
                     1); // unselected segments extend lines to bordering selected data point (safe to exceed total data bounds in first/last segment, getLines takes care)
         getLines(&lines, lineDataRange);
 
 // check data validity if flag set:
 #ifdef QCUSTOMPLOT_CHECK_DATA
         QCPGraphDataContainer::const_iterator it;
         for (it = mDataContainer->constBegin(); it != mDataContainer->constEnd(); ++it)
         {
             if (QCP::isInvalidData(it->key, it->value))
                 qDebug() << Q_FUNC_INFO << "Data point at" << it->key << "invalid."
                          << "Plottable name:" << name();
         }
 #endif
 
         // draw fill of graph:
         if (isSelectedSegment && mSelectionDecorator)
             mSelectionDecorator->applyBrush(painter);
         else
             painter->setBrush(mBrush);
         painter->setPen(Qt::NoPen);
         drawFill(painter, &lines);
 
         // draw line:
         if (mLineStyle != lsNone)
         {
             if (isSelectedSegment && mSelectionDecorator)
                 mSelectionDecorator->applyPen(painter);
             else
                 painter->setPen(mPen);
             painter->setBrush(Qt::NoBrush);
             if (mLineStyle == lsImpulse)
                 drawImpulsePlot(painter, lines);
             else
                 drawLinePlot(painter, lines); // also step plots can be drawn as a line plot
         }
 
         // draw scatters:
         QCPScatterStyle finalScatterStyle = mScatterStyle;
         if (isSelectedSegment && mSelectionDecorator)
             finalScatterStyle = mSelectionDecorator->getFinalScatterStyle(mScatterStyle);
         if (!finalScatterStyle.isNone())
         {
             getScatters(&scatters, allSegments.at(i));
             drawScatterPlot(painter, scatters, finalScatterStyle);
         }
     }
 
     // draw other selection decoration that isn't just line/scatter pens and brushes:
     if (mSelectionDecorator)
         mSelectionDecorator->drawDecoration(painter, selection());
 }
 
 /* inherits documentation from base class */
 void QCPGraph::drawLegendIcon(QCPPainter *painter, const QRectF &rect) const
 {
     // draw fill:
     if (mBrush.style() != Qt::NoBrush)
     {
         applyFillAntialiasingHint(painter);
         painter->fillRect(QRectF(rect.left(), rect.top() + rect.height() / 2.0, rect.width(), rect.height() / 3.0),
                           mBrush);
     }
     // draw line vertically centered:
     if (mLineStyle != lsNone)
     {
         applyDefaultAntialiasingHint(painter);
         painter->setPen(mPen);
         painter->drawLine(
             QLineF(rect.left(), rect.top() + rect.height() / 2.0, rect.right() + 5,
                    rect.top() + rect.height() / 2.0)); // +5 on x2 else last segment is missing from dashed/dotted pens
     }
     // draw scatter symbol:
     if (!mScatterStyle.isNone())
     {
         applyScattersAntialiasingHint(painter);
         // scale scatter pixmap if it's too large to fit in legend icon rect:
         if (mScatterStyle.shape() == QCPScatterStyle::ssPixmap &&
             (mScatterStyle.pixmap().size().width() > rect.width() ||
              mScatterStyle.pixmap().size().height() > rect.height()))
         {
             QCPScatterStyle scaledStyle(mScatterStyle);
             scaledStyle.setPixmap(
                 scaledStyle.pixmap().scaled(rect.size().toSize(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
             scaledStyle.applyTo(painter, mPen);
             scaledStyle.drawShape(painter, QRectF(rect).center());
         }
         else
         {
             mScatterStyle.applyTo(painter, mPen);
             mScatterStyle.drawShape(painter, QRectF(rect).center());
         }
     }
 }
 
 /*! \internal
 
   This method retrieves an optimized set of data points via \ref getOptimizedLineData, an branches
   out to the line style specific functions such as \ref dataToLines, \ref dataToStepLeftLines, etc.
   according to the line style of the graph.
 
   \a lines will be filled with points in pixel coordinates, that can be drawn with the according
   draw functions like \ref drawLinePlot and \ref drawImpulsePlot. The points returned in \a lines
   aren't necessarily the original data points. For example, step line styles require additional
   points to form the steps when drawn. If the line style of the graph is \ref lsNone, the \a
   lines vector will be empty.
 
   \a dataRange specifies the beginning and ending data indices that will be taken into account for
   conversion. In this function, the specified range may exceed the total data bounds without harm:
   a correspondingly trimmed data range will be used. This takes the burden off the user of this
   function to check for valid indices in \a dataRange, e.g. when extending ranges coming from \ref
   getDataSegments.
 
   \see getScatters
 */
 void QCPGraph::getLines(QVector<QPointF> *lines, const QCPDataRange &dataRange) const
 {
     if (!lines)
         return;
     QCPGraphDataContainer::const_iterator begin, end;
     getVisibleDataBounds(begin, end, dataRange);
     if (begin == end)
     {
         lines->clear();
         return;
     }
 
     QVector<QCPGraphData> lineData;
     if (mLineStyle != lsNone)
         getOptimizedLineData(&lineData, begin, end);
 
     switch (mLineStyle)
     {
         case lsNone:
             lines->clear();
             break;
         case lsLine:
             *lines = dataToLines(lineData);
             break;
         case lsStepLeft:
             *lines = dataToStepLeftLines(lineData);
             break;
         case lsStepRight:
             *lines = dataToStepRightLines(lineData);
             break;
         case lsStepCenter:
             *lines = dataToStepCenterLines(lineData);
             break;
         case lsImpulse:
             *lines = dataToImpulseLines(lineData);
             break;
     }
 }
 
 /*! \internal
 
   This method retrieves an optimized set of data points via \ref getOptimizedScatterData and then
   converts them to pixel coordinates. The resulting points are returned in \a scatters, and can be
   passed to \ref drawScatterPlot.
 
   \a dataRange specifies the beginning and ending data indices that will be taken into account for
   conversion. In this function, the specified range may exceed the total data bounds without harm:
   a correspondingly trimmed data range will be used. This takes the burden off the user of this
   function to check for valid indices in \a dataRange, e.g. when extending ranges coming from \ref
   getDataSegments.
 */
 void QCPGraph::getScatters(QVector<QPointF> *scatters, const QCPDataRange &dataRange) const
 {
     if (!scatters)
         return;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         scatters->clear();
         return;
     }
 
     QCPGraphDataContainer::const_iterator begin, end;
     getVisibleDataBounds(begin, end, dataRange);
     if (begin == end)
     {
         scatters->clear();
         return;
     }
 
     QVector<QCPGraphData> data;
     getOptimizedScatterData(&data, begin, end);
     scatters->resize(data.size());
     if (keyAxis->orientation() == Qt::Vertical)
     {
         for (int i = 0; i < data.size(); ++i)
         {
             if (!qIsNaN(data.at(i).value))
             {
                 (*scatters)[i].setX(valueAxis->coordToPixel(data.at(i).value));
                 (*scatters)[i].setY(keyAxis->coordToPixel(data.at(i).key));
             }
         }
     }
     else
     {
         for (int i = 0; i < data.size(); ++i)
         {
             if (!qIsNaN(data.at(i).value))
             {
                 (*scatters)[i].setX(keyAxis->coordToPixel(data.at(i).key));
                 (*scatters)[i].setY(valueAxis->coordToPixel(data.at(i).value));
             }
         }
     }
 }
 
 /*! \internal
 
   Takes raw data points in plot coordinates as \a data, and returns a vector containing pixel
   coordinate points which are suitable for drawing the line style \ref lsLine.
 
   The source of \a data is usually \ref getOptimizedLineData, and this method is called in \a
   getLines if the line style is set accordingly.
 
   \see dataToStepLeftLines, dataToStepRightLines, dataToStepCenterLines, dataToImpulseLines, getLines, drawLinePlot
 */
 QVector<QPointF> QCPGraph::dataToLines(const QVector<QCPGraphData> &data) const
 {
     QVector<QPointF> result;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return result;
     }
 
     result.reserve(data.size() +
                    2); // added 2 to reserve memory for lower/upper fill base points that might be needed for fill
     result.resize(data.size());
 
     // transform data points to pixels:
     if (keyAxis->orientation() == Qt::Vertical)
     {
         for (int i = 0; i < data.size(); ++i)
         {
             result[i].setX(valueAxis->coordToPixel(data.at(i).value));
             result[i].setY(keyAxis->coordToPixel(data.at(i).key));
         }
     }
     else // key axis is horizontal
     {
         for (int i = 0; i < data.size(); ++i)
         {
             result[i].setX(keyAxis->coordToPixel(data.at(i).key));
             result[i].setY(valueAxis->coordToPixel(data.at(i).value));
         }
     }
     return result;
 }
 
 /*! \internal
 
   Takes raw data points in plot coordinates as \a data, and returns a vector containing pixel
   coordinate points which are suitable for drawing the line style \ref lsStepLeft.
 
   The source of \a data is usually \ref getOptimizedLineData, and this method is called in \a
   getLines if the line style is set accordingly.
 
   \see dataToLines, dataToStepRightLines, dataToStepCenterLines, dataToImpulseLines, getLines, drawLinePlot
 */
 QVector<QPointF> QCPGraph::dataToStepLeftLines(const QVector<QCPGraphData> &data) const
 {
     QVector<QPointF> result;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return result;
     }
 
     result.reserve(data.size() * 2 +
                    2); // added 2 to reserve memory for lower/upper fill base points that might be needed for fill
     result.resize(data.size() * 2);
 
     // calculate steps from data and transform to pixel coordinates:
     if (keyAxis->orientation() == Qt::Vertical)
     {
         double lastValue = valueAxis->coordToPixel(data.first().value);
         for (int i = 0; i < data.size(); ++i)
         {
             const double key = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 0].setX(lastValue);
             result[i * 2 + 0].setY(key);
             lastValue = valueAxis->coordToPixel(data.at(i).value);
             result[i * 2 + 1].setX(lastValue);
             result[i * 2 + 1].setY(key);
         }
     }
     else // key axis is horizontal
     {
         double lastValue = valueAxis->coordToPixel(data.first().value);
         for (int i = 0; i < data.size(); ++i)
         {
             const double key = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 0].setX(key);
             result[i * 2 + 0].setY(lastValue);
             lastValue = valueAxis->coordToPixel(data.at(i).value);
             result[i * 2 + 1].setX(key);
             result[i * 2 + 1].setY(lastValue);
         }
     }
     return result;
 }
 
 /*! \internal
 
   Takes raw data points in plot coordinates as \a data, and returns a vector containing pixel
   coordinate points which are suitable for drawing the line style \ref lsStepRight.
 
   The source of \a data is usually \ref getOptimizedLineData, and this method is called in \a
   getLines if the line style is set accordingly.
 
   \see dataToLines, dataToStepLeftLines, dataToStepCenterLines, dataToImpulseLines, getLines, drawLinePlot
 */
 QVector<QPointF> QCPGraph::dataToStepRightLines(const QVector<QCPGraphData> &data) const
 {
     QVector<QPointF> result;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return result;
     }
 
     result.reserve(data.size() * 2 +
                    2); // added 2 to reserve memory for lower/upper fill base points that might be needed for fill
     result.resize(data.size() * 2);
 
     // calculate steps from data and transform to pixel coordinates:
     if (keyAxis->orientation() == Qt::Vertical)
     {
         double lastKey = keyAxis->coordToPixel(data.first().key);
         for (int i = 0; i < data.size(); ++i)
         {
             const double value = valueAxis->coordToPixel(data.at(i).value);
             result[i * 2 + 0].setX(value);
             result[i * 2 + 0].setY(lastKey);
             lastKey = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 1].setX(value);
             result[i * 2 + 1].setY(lastKey);
         }
     }
     else // key axis is horizontal
     {
         double lastKey = keyAxis->coordToPixel(data.first().key);
         for (int i = 0; i < data.size(); ++i)
         {
             const double value = valueAxis->coordToPixel(data.at(i).value);
             result[i * 2 + 0].setX(lastKey);
             result[i * 2 + 0].setY(value);
             lastKey = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 1].setX(lastKey);
             result[i * 2 + 1].setY(value);
         }
     }
     return result;
 }
 
 /*! \internal
 
   Takes raw data points in plot coordinates as \a data, and returns a vector containing pixel
   coordinate points which are suitable for drawing the line style \ref lsStepCenter.
 
   The source of \a data is usually \ref getOptimizedLineData, and this method is called in \a
   getLines if the line style is set accordingly.
 
   \see dataToLines, dataToStepLeftLines, dataToStepRightLines, dataToImpulseLines, getLines, drawLinePlot
 */
 QVector<QPointF> QCPGraph::dataToStepCenterLines(const QVector<QCPGraphData> &data) const
 {
     QVector<QPointF> result;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return result;
     }
 
     result.reserve(data.size() * 2 +
                    2); // added 2 to reserve memory for lower/upper fill base points that might be needed for fill
     result.resize(data.size() * 2);
 
     // calculate steps from data and transform to pixel coordinates:
     if (keyAxis->orientation() == Qt::Vertical)
     {
         double lastKey   = keyAxis->coordToPixel(data.first().key);
         double lastValue = valueAxis->coordToPixel(data.first().value);
         result[0].setX(lastValue);
         result[0].setY(lastKey);
         for (int i = 1; i < data.size(); ++i)
         {
             const double key = (keyAxis->coordToPixel(data.at(i).key) + lastKey) * 0.5;
             result[i * 2 - 1].setX(lastValue);
             result[i * 2 - 1].setY(key);
             lastValue = valueAxis->coordToPixel(data.at(i).value);
             lastKey   = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 0].setX(lastValue);
             result[i * 2 + 0].setY(key);
         }
         result[data.size() * 2 - 1].setX(lastValue);
         result[data.size() * 2 - 1].setY(lastKey);
     }
     else // key axis is horizontal
     {
         double lastKey   = keyAxis->coordToPixel(data.first().key);
         double lastValue = valueAxis->coordToPixel(data.first().value);
         result[0].setX(lastKey);
         result[0].setY(lastValue);
         for (int i = 1; i < data.size(); ++i)
         {
             const double key = (keyAxis->coordToPixel(data.at(i).key) + lastKey) * 0.5;
             result[i * 2 - 1].setX(key);
             result[i * 2 - 1].setY(lastValue);
             lastValue = valueAxis->coordToPixel(data.at(i).value);
             lastKey   = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 0].setX(key);
             result[i * 2 + 0].setY(lastValue);
         }
         result[data.size() * 2 - 1].setX(lastKey);
         result[data.size() * 2 - 1].setY(lastValue);
     }
     return result;
 }
 
 /*! \internal
 
   Takes raw data points in plot coordinates as \a data, and returns a vector containing pixel
   coordinate points which are suitable for drawing the line style \ref lsImpulse.
 
   The source of \a data is usually \ref getOptimizedLineData, and this method is called in \a
   getLines if the line style is set accordingly.
 
   \see dataToLines, dataToStepLeftLines, dataToStepRightLines, dataToStepCenterLines, getLines, drawImpulsePlot
 */
 QVector<QPointF> QCPGraph::dataToImpulseLines(const QVector<QCPGraphData> &data) const
 {
     QVector<QPointF> result;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return result;
     }
 
     result.resize(data.size() * 2); // no need to reserve 2 extra points because impulse plot has no fill
 
     // transform data points to pixels:
     if (keyAxis->orientation() == Qt::Vertical)
     {
         for (int i = 0; i < data.size(); ++i)
         {
             const double key = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 0].setX(valueAxis->coordToPixel(0));
             result[i * 2 + 0].setY(key);
             result[i * 2 + 1].setX(valueAxis->coordToPixel(data.at(i).value));
             result[i * 2 + 1].setY(key);
         }
     }
     else // key axis is horizontal
     {
         for (int i = 0; i < data.size(); ++i)
         {
             const double key = keyAxis->coordToPixel(data.at(i).key);
             result[i * 2 + 0].setX(key);
             result[i * 2 + 0].setY(valueAxis->coordToPixel(0));
             result[i * 2 + 1].setX(key);
             result[i * 2 + 1].setY(valueAxis->coordToPixel(data.at(i).value));
         }
     }
     return result;
 }
 
 /*! \internal
 
   Draws the fill of the graph using the specified \a painter, with the currently set brush.
 
   \a lines contains the points of the graph line, in pixel coordinates.
 
   If the fill is a normal fill towards the zero-value-line, only the points in \a lines are
   required and two extra points at the zero-value-line, which are added by \ref addFillBasePoints
   and removed by \ref removeFillBasePoints after the fill drawing is done.
 
   On the other hand if the fill is a channel fill between this QCPGraph and another QCPGraph (\a
   mChannelFillGraph), the more complex polygon is calculated with the \ref getChannelFillPolygon
   function, and then drawn.
 
   \see drawLinePlot, drawImpulsePlot, drawScatterPlot
 */
 void QCPGraph::drawFill(QCPPainter *painter, QVector<QPointF> *lines) const
 {
     if (mLineStyle == lsImpulse)
         return; // fill doesn't make sense for impulse plot
     if (painter->brush().style() == Qt::NoBrush || painter->brush().color().alpha() == 0)
         return;
 
     applyFillAntialiasingHint(painter);
     if (!mChannelFillGraph)
     {
         // draw base fill under graph, fill goes all the way to the zero-value-line:
         addFillBasePoints(lines);
         painter->drawPolygon(QPolygonF(*lines));
         removeFillBasePoints(lines);
     }
     else
     {
         // draw channel fill between this graph and mChannelFillGraph:
         painter->drawPolygon(getChannelFillPolygon(lines));
     }
 }
 
 /*! \internal
 
   Draws scatter symbols at every point passed in \a scatters, given in pixel coordinates. The
   scatters will be drawn with \a painter and have the appearance as specified in \a style.
 
   \see drawLinePlot, drawImpulsePlot
 */
 void QCPGraph::drawScatterPlot(QCPPainter *painter, const QVector<QPointF> &scatters,
                                const QCPScatterStyle &style) const
 {
     applyScattersAntialiasingHint(painter);
     style.applyTo(painter, mPen);
     for (int i = 0; i < scatters.size(); ++i)
         style.drawShape(painter, scatters.at(i).x(), scatters.at(i).y());
 }
 
 /*!  \internal
 
   Draws lines between the points in \a lines, given in pixel coordinates.
 
   \see drawScatterPlot, drawImpulsePlot, QCPAbstractPlottable1D::drawPolyline
 */
 void QCPGraph::drawLinePlot(QCPPainter *painter, const QVector<QPointF> &lines) const
 {
     if (painter->pen().style() != Qt::NoPen && painter->pen().color().alpha() != 0)
     {
         applyDefaultAntialiasingHint(painter);
         drawPolyline(painter, lines);
     }
 }
 
 /*! \internal
 
   Draws impulses from the provided data, i.e. it connects all line pairs in \a lines, given in
   pixel coordinates. The \a lines necessary for impulses are generated by \ref dataToImpulseLines
   from the regular graph data points.
 
   \see drawLinePlot, drawScatterPlot
 */
 void QCPGraph::drawImpulsePlot(QCPPainter *painter, const QVector<QPointF> &lines) const
 {
     if (painter->pen().style() != Qt::NoPen && painter->pen().color().alpha() != 0)
     {
         applyDefaultAntialiasingHint(painter);
         QPen oldPen = painter->pen();
         QPen newPen = painter->pen();
         newPen.setCapStyle(Qt::FlatCap); // so impulse line doesn't reach beyond zero-line
         painter->setPen(newPen);
         painter->drawLines(lines);
         painter->setPen(oldPen);
     }
 }
 
 /*! \internal
 
   Returns via \a lineData the data points that need to be visualized for this graph when plotting
   graph lines, taking into consideration the currently visible axis ranges and, if \ref
   setAdaptiveSampling is enabled, local point densities. The considered data can be restricted
   further by \a begin and \a end, e.g. to only plot a certain segment of the data (see \ref
   getDataSegments).
 
   This method is used by \ref getLines to retrieve the basic working set of data.
 
   \see getOptimizedScatterData
 */
 void QCPGraph::getOptimizedLineData(QVector<QCPGraphData> *lineData, const QCPGraphDataContainer::const_iterator &begin,
                                     const QCPGraphDataContainer::const_iterator &end) const
 {
     if (!lineData)
         return;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
     if (begin == end)
         return;
 
     int dataCount = end - begin;
     int maxCount  = std::numeric_limits<int>::max();
     if (mAdaptiveSampling)
     {
         double keyPixelSpan = qAbs(keyAxis->coordToPixel(begin->key) - keyAxis->coordToPixel((end - 1)->key));
         if (2 * keyPixelSpan + 2 < (double)std::numeric_limits<int>::max())
             maxCount = 2 * keyPixelSpan + 2;
     }
 
     if (mAdaptiveSampling &&
         dataCount >= maxCount) // use adaptive sampling only if there are at least two points per pixel on average
     {
         QCPGraphDataContainer::const_iterator it                        = begin;
         double minValue                                                 = it->value;
         double maxValue                                                 = it->value;
         QCPGraphDataContainer::const_iterator currentIntervalFirstPoint = it;
         int reversedFactor =
             keyAxis->pixelOrientation(); // is used to calculate keyEpsilon pixel into the correct direction
         int reversedRound =
             reversedFactor == -1 ?
                 1 :
                 0; // is used to switch between floor (normal) and ceil (reversed) rounding of currentIntervalStartKey
         double currentIntervalStartKey =
             keyAxis->pixelToCoord((int)(keyAxis->coordToPixel(begin->key) + reversedRound));
         double lastIntervalEndKey = currentIntervalStartKey;
         double keyEpsilon =
             qAbs(currentIntervalStartKey -
                  keyAxis->pixelToCoord(
                      keyAxis->coordToPixel(currentIntervalStartKey) +
                      1.0 * reversedFactor)); // interval of one pixel on screen when mapped to plot key coordinates
         bool keyEpsilonVariable =
             keyAxis->scaleType() ==
             QCPAxis::
                 stLogarithmic; // indicates whether keyEpsilon needs to be updated after every interval (for log axes)
         int intervalDataCount = 1;
         ++it; // advance iterator to second data point because adaptive sampling works in 1 point retrospect
         while (it != end)
         {
             if (it->key <
                 currentIntervalStartKey +
                     keyEpsilon) // data point is still within same pixel, so skip it and expand value span of this cluster if necessary
             {
                 if (it->value < minValue)
                     minValue = it->value;
                 else if (it->value > maxValue)
                     maxValue = it->value;
                 ++intervalDataCount;
             }
             else // new pixel interval started
             {
                 if (intervalDataCount >= 2) // last pixel had multiple data points, consolidate them to a cluster
                 {
                     if (lastIntervalEndKey <
                         currentIntervalStartKey -
                             keyEpsilon) // last point is further away, so first point of this cluster must be at a real data point
                         lineData->append(
                             QCPGraphData(currentIntervalStartKey + keyEpsilon * 0.2, currentIntervalFirstPoint->value));
                     lineData->append(QCPGraphData(currentIntervalStartKey + keyEpsilon * 0.25, minValue));
                     lineData->append(QCPGraphData(currentIntervalStartKey + keyEpsilon * 0.75, maxValue));
                     if (it->key >
                         currentIntervalStartKey +
                             keyEpsilon *
                                 2) // new pixel started further away from previous cluster, so make sure the last point of the cluster is at a real data point
                         lineData->append(QCPGraphData(currentIntervalStartKey + keyEpsilon * 0.8, (it - 1)->value));
                 }
                 else
                     lineData->append(QCPGraphData(currentIntervalFirstPoint->key, currentIntervalFirstPoint->value));
                 lastIntervalEndKey        = (it - 1)->key;
                 minValue                  = it->value;
                 maxValue                  = it->value;
                 currentIntervalFirstPoint = it;
                 currentIntervalStartKey = keyAxis->pixelToCoord((int)(keyAxis->coordToPixel(it->key) + reversedRound));
                 if (keyEpsilonVariable)
                     keyEpsilon = qAbs(
                         currentIntervalStartKey -
                         keyAxis->pixelToCoord(keyAxis->coordToPixel(currentIntervalStartKey) + 1.0 * reversedFactor));
                 intervalDataCount = 1;
             }
             ++it;
         }
         // handle last interval:
         if (intervalDataCount >= 2) // last pixel had multiple data points, consolidate them to a cluster
         {
             if (lastIntervalEndKey <
                 currentIntervalStartKey -
                     keyEpsilon) // last point wasn't a cluster, so first point of this cluster must be at a real data point
                 lineData->append(
                     QCPGraphData(currentIntervalStartKey + keyEpsilon * 0.2, currentIntervalFirstPoint->value));
             lineData->append(QCPGraphData(currentIntervalStartKey + keyEpsilon * 0.25, minValue));
             lineData->append(QCPGraphData(currentIntervalStartKey + keyEpsilon * 0.75, maxValue));
         }
         else
             lineData->append(QCPGraphData(currentIntervalFirstPoint->key, currentIntervalFirstPoint->value));
     }
     else // don't use adaptive sampling algorithm, transfer points one-to-one from the data container into the output
     {
         QCPGraphDataContainer::const_iterator it = begin;
         lineData->reserve(dataCount + 2); // +2 for possible fill end points
         while (it != end)
         {
             lineData->append(*it);
             ++it;
         }
     }
 }
 
 /*! \internal
 
   Returns via \a scatterData the data points that need to be visualized for this graph when
   plotting scatter points, taking into consideration the currently visible axis ranges and, if \ref
   setAdaptiveSampling is enabled, local point densities. The considered data can be restricted
   further by \a begin and \a end, e.g. to only plot a certain segment of the data (see \ref
   getDataSegments).
 
   This method is used by \ref getScatters to retrieve the basic working set of data.
 
   \see getOptimizedLineData
 */
 void QCPGraph::getOptimizedScatterData(QVector<QCPGraphData> *scatterData, QCPGraphDataContainer::const_iterator begin,
                                        QCPGraphDataContainer::const_iterator end) const
 {
     if (!scatterData)
         return;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     const int scatterModulo  = mScatterSkip + 1;
     const bool doScatterSkip = mScatterSkip > 0;
     int beginIndex           = begin - mDataContainer->constBegin();
     int endIndex             = end - mDataContainer->constBegin();
     while (doScatterSkip && begin != end &&
            beginIndex % scatterModulo != 0) // advance begin iterator to first non-skipped scatter
     {
         ++beginIndex;
         ++begin;
     }
     if (begin == end)
         return;
     int dataCount = end - begin;
     int maxCount  = std::numeric_limits<int>::max();
     if (mAdaptiveSampling)
     {
         int keyPixelSpan = qAbs(keyAxis->coordToPixel(begin->key) - keyAxis->coordToPixel((end - 1)->key));
         maxCount         = 2 * keyPixelSpan + 2;
     }
 
     if (mAdaptiveSampling &&
         dataCount >= maxCount) // use adaptive sampling only if there are at least two points per pixel on average
     {
         double valueMaxRange                                       = valueAxis->range().upper;
         double valueMinRange                                       = valueAxis->range().lower;
         QCPGraphDataContainer::const_iterator it                   = begin;
         int itIndex                                                = beginIndex;
         double minValue                                            = it->value;
         double maxValue                                            = it->value;
         QCPGraphDataContainer::const_iterator minValueIt           = it;
         QCPGraphDataContainer::const_iterator maxValueIt           = it;
         QCPGraphDataContainer::const_iterator currentIntervalStart = it;
         int reversedFactor =
             keyAxis->pixelOrientation(); // is used to calculate keyEpsilon pixel into the correct direction
         int reversedRound =
             reversedFactor == -1 ?
                 1 :
                 0; // is used to switch between floor (normal) and ceil (reversed) rounding of currentIntervalStartKey
         double currentIntervalStartKey =
             keyAxis->pixelToCoord((int)(keyAxis->coordToPixel(begin->key) + reversedRound));
         double keyEpsilon =
             qAbs(currentIntervalStartKey -
                  keyAxis->pixelToCoord(
                      keyAxis->coordToPixel(currentIntervalStartKey) +
                      1.0 * reversedFactor)); // interval of one pixel on screen when mapped to plot key coordinates
         bool keyEpsilonVariable =
             keyAxis->scaleType() ==
             QCPAxis::
                 stLogarithmic; // indicates whether keyEpsilon needs to be updated after every interval (for log axes)
         int intervalDataCount = 1;
         // advance iterator to second (non-skipped) data point because adaptive sampling works in 1 point retrospect:
         if (!doScatterSkip)
             ++it;
         else
         {
             itIndex += scatterModulo;
             if (itIndex < endIndex) // make sure we didn't jump over end
                 it += scatterModulo;
             else
             {
                 it      = end;
                 itIndex = endIndex;
             }
         }
         // main loop over data points:
         while (it != end)
         {
             if (it->key <
                 currentIntervalStartKey +
                     keyEpsilon) // data point is still within same pixel, so skip it and expand value span of this pixel if necessary
             {
                 if (it->value < minValue && it->value > valueMinRange && it->value < valueMaxRange)
                 {
                     minValue   = it->value;
                     minValueIt = it;
                 }
                 else if (it->value > maxValue && it->value > valueMinRange && it->value < valueMaxRange)
                 {
                     maxValue   = it->value;
                     maxValueIt = it;
                 }
                 ++intervalDataCount;
             }
             else // new pixel started
             {
                 if (intervalDataCount >= 2) // last pixel had multiple data points, consolidate them
                 {
                     // determine value pixel span and add as many points in interval to maintain certain vertical data density (this is specific to scatter plot):
                     double valuePixelSpan = qAbs(valueAxis->coordToPixel(minValue) - valueAxis->coordToPixel(maxValue));
                     int dataModulo        = qMax(
                         1,
                         qRound(intervalDataCount /
                                (valuePixelSpan / 4.0))); // approximately every 4 value pixels one data point on average
                     QCPGraphDataContainer::const_iterator intervalIt = currentIntervalStart;
                     int c                                            = 0;
                     while (intervalIt != it)
                     {
                         if ((c % dataModulo == 0 || intervalIt == minValueIt || intervalIt == maxValueIt) &&
                             intervalIt->value > valueMinRange && intervalIt->value < valueMaxRange)
                             scatterData->append(*intervalIt);
                         ++c;
                         if (!doScatterSkip)
                             ++intervalIt;
                         else
                             intervalIt +=
                                 scatterModulo; // since we know indices of "currentIntervalStart", "intervalIt" and "it" are multiples of scatterModulo, we can't accidentally jump over "it" here
                     }
                 }
                 else if (currentIntervalStart->value > valueMinRange && currentIntervalStart->value < valueMaxRange)
                     scatterData->append(*currentIntervalStart);
                 minValue                = it->value;
                 maxValue                = it->value;
                 currentIntervalStart    = it;
                 currentIntervalStartKey = keyAxis->pixelToCoord((int)(keyAxis->coordToPixel(it->key) + reversedRound));
                 if (keyEpsilonVariable)
                     keyEpsilon = qAbs(
                         currentIntervalStartKey -
                         keyAxis->pixelToCoord(keyAxis->coordToPixel(currentIntervalStartKey) + 1.0 * reversedFactor));
                 intervalDataCount = 1;
             }
             // advance to next data point:
             if (!doScatterSkip)
                 ++it;
             else
             {
                 itIndex += scatterModulo;
                 if (itIndex < endIndex) // make sure we didn't jump over end
                     it += scatterModulo;
                 else
                 {
                     it      = end;
                     itIndex = endIndex;
                 }
             }
         }
         // handle last interval:
         if (intervalDataCount >= 2) // last pixel had multiple data points, consolidate them
         {
             // determine value pixel span and add as many points in interval to maintain certain vertical data density (this is specific to scatter plot):
             double valuePixelSpan = qAbs(valueAxis->coordToPixel(minValue) - valueAxis->coordToPixel(maxValue));
             int dataModulo =
                 qMax(1, qRound(intervalDataCount /
                                (valuePixelSpan / 4.0))); // approximately every 4 value pixels one data point on average
             QCPGraphDataContainer::const_iterator intervalIt = currentIntervalStart;
             int intervalItIndex                              = intervalIt - mDataContainer->constBegin();
             int c                                            = 0;
             while (intervalIt != it)
             {
                 if ((c % dataModulo == 0 || intervalIt == minValueIt || intervalIt == maxValueIt) &&
                     intervalIt->value > valueMinRange && intervalIt->value < valueMaxRange)
                     scatterData->append(*intervalIt);
                 ++c;
                 if (!doScatterSkip)
                     ++intervalIt;
                 else // here we can't guarantee that adding scatterModulo doesn't exceed "it" (because "it" is equal to "end" here, and "end" isn't scatterModulo-aligned), so check via index comparison:
                 {
                     intervalItIndex += scatterModulo;
                     if (intervalItIndex < itIndex)
                         intervalIt += scatterModulo;
                     else
                     {
                         intervalIt      = it;
                         intervalItIndex = itIndex;
                     }
                 }
             }
         }
         else if (currentIntervalStart->value > valueMinRange && currentIntervalStart->value < valueMaxRange)
             scatterData->append(*currentIntervalStart);
     }
     else // don't use adaptive sampling algorithm, transfer points one-to-one from the data container into the output
     {
         QCPGraphDataContainer::const_iterator it = begin;
         int itIndex                              = beginIndex;
         scatterData->reserve(dataCount);
         while (it != end)
         {
             scatterData->append(*it);
             // advance to next data point:
             if (!doScatterSkip)
                 ++it;
             else
             {
                 itIndex += scatterModulo;
                 if (itIndex < endIndex)
                     it += scatterModulo;
                 else
                 {
                     it      = end;
                     itIndex = endIndex;
                 }
             }
         }
     }
 }
 
 /*!
   This method outputs the currently visible data range via \a begin and \a end. The returned range
   will also never exceed \a rangeRestriction.
 
   This method takes into account that the drawing of data lines at the axis rect border always
   requires the points just outside the visible axis range. So \a begin and \a end may actually
   indicate a range that contains one additional data point to the left and right of the visible
   axis range.
 */
 void QCPGraph::getVisibleDataBounds(QCPGraphDataContainer::const_iterator &begin,
                                     QCPGraphDataContainer::const_iterator &end,
                                     const QCPDataRange &rangeRestriction) const
 {
     if (rangeRestriction.isEmpty())
     {
         end   = mDataContainer->constEnd();
         begin = end;
     }
     else
     {
         QCPAxis *keyAxis   = mKeyAxis.data();
         QCPAxis *valueAxis = mValueAxis.data();
         if (!keyAxis || !valueAxis)
         {
             qDebug() << Q_FUNC_INFO << "invalid key or value axis";
             return;
         }
         // get visible data range:
         begin = mDataContainer->findBegin(keyAxis->range().lower);
         end   = mDataContainer->findEnd(keyAxis->range().upper);
         // limit lower/upperEnd to rangeRestriction:
         mDataContainer->limitIteratorsToDataRange(
             begin, end,
             rangeRestriction); // this also ensures rangeRestriction outside data bounds doesn't break anything
     }
 }
 
 /*! \internal
 
   The line vector generated by e.g. \ref getLines describes only the line that connects the data
   points. If the graph needs to be filled, two additional points need to be added at the
   value-zero-line in the lower and upper key positions of the graph. This function calculates these
   points and adds them to the end of \a lineData. Since the fill is typically drawn before the line
   stroke, these added points need to be removed again after the fill is done, with the
   removeFillBasePoints function.
 
   The expanding of \a lines by two points will not cause unnecessary memory reallocations, because
   the data vector generation functions (e.g. \ref getLines) reserve two extra points when they
   allocate memory for \a lines.
 
   \see removeFillBasePoints, lowerFillBasePoint, upperFillBasePoint
 */
 void QCPGraph::addFillBasePoints(QVector<QPointF> *lines) const
 {
     if (!mKeyAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key axis";
         return;
     }
     if (!lines)
     {
         qDebug() << Q_FUNC_INFO << "passed null as lineData";
         return;
     }
     if (lines->isEmpty())
         return;
 
     // append points that close the polygon fill at the key axis:
     if (mKeyAxis.data()->orientation() == Qt::Vertical)
     {
         *lines << upperFillBasePoint(lines->last().y());
         *lines << lowerFillBasePoint(lines->first().y());
     }
     else
     {
         *lines << upperFillBasePoint(lines->last().x());
         *lines << lowerFillBasePoint(lines->first().x());
     }
 }
 
 /*! \internal
 
   removes the two points from \a lines that were added by \ref addFillBasePoints.
 
   \see addFillBasePoints, lowerFillBasePoint, upperFillBasePoint
 */
 void QCPGraph::removeFillBasePoints(QVector<QPointF> *lines) const
 {
     if (!lines)
     {
         qDebug() << Q_FUNC_INFO << "passed null as lineData";
         return;
     }
     if (lines->isEmpty())
         return;
 
     lines->remove(lines->size() - 2, 2);
 }
 
 /*! \internal
 
   called by \ref addFillBasePoints to conveniently assign the point which closes the fill polygon
   on the lower side of the zero-value-line parallel to the key axis. The logarithmic axis scale
   case is a bit special, since the zero-value-line in pixel coordinates is in positive or negative
   infinity. So this case is handled separately by just closing the fill polygon on the axis which
   lies in the direction towards the zero value.
 
   \a lowerKey will be the key (in pixels) of the returned point. Depending on whether the key
   axis is horizontal or vertical, \a lowerKey will end up as the x or y value of the returned
   point, respectively.
 
   \see upperFillBasePoint, addFillBasePoints
 */
 QPointF QCPGraph::lowerFillBasePoint(double lowerKey) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return QPointF();
     }
 
     QPointF point;
     if (valueAxis->scaleType() == QCPAxis::stLinear)
     {
         if (keyAxis->axisType() == QCPAxis::atLeft)
         {
             point.setX(valueAxis->coordToPixel(0));
             point.setY(lowerKey);
         }
         else if (keyAxis->axisType() == QCPAxis::atRight)
         {
             point.setX(valueAxis->coordToPixel(0));
             point.setY(lowerKey);
         }
         else if (keyAxis->axisType() == QCPAxis::atTop)
         {
             point.setX(lowerKey);
             point.setY(valueAxis->coordToPixel(0));
         }
         else if (keyAxis->axisType() == QCPAxis::atBottom)
         {
             point.setX(lowerKey);
             point.setY(valueAxis->coordToPixel(0));
         }
     }
     else // valueAxis->mScaleType == QCPAxis::stLogarithmic
     {
         // In logarithmic scaling we can't just draw to value zero so we just fill all the way
         // to the axis which is in the direction towards zero
         if (keyAxis->orientation() == Qt::Vertical)
         {
             if ((valueAxis->range().upper < 0 && !valueAxis->rangeReversed()) ||
                 (valueAxis->range().upper > 0 &&
                  valueAxis->rangeReversed())) // if range is negative, zero is on opposite side of key axis
                 point.setX(keyAxis->axisRect()->right());
             else
                 point.setX(keyAxis->axisRect()->left());
             point.setY(lowerKey);
         }
         else if (keyAxis->axisType() == QCPAxis::atTop || keyAxis->axisType() == QCPAxis::atBottom)
         {
             point.setX(lowerKey);
             if ((valueAxis->range().upper < 0 && !valueAxis->rangeReversed()) ||
                 (valueAxis->range().upper > 0 &&
                  valueAxis->rangeReversed())) // if range is negative, zero is on opposite side of key axis
                 point.setY(keyAxis->axisRect()->top());
             else
                 point.setY(keyAxis->axisRect()->bottom());
         }
     }
     return point;
 }
 
 /*! \internal
 
   called by \ref addFillBasePoints to conveniently assign the point which closes the fill
   polygon on the upper side of the zero-value-line parallel to the key axis. The logarithmic axis
   scale case is a bit special, since the zero-value-line in pixel coordinates is in positive or
   negative infinity. So this case is handled separately by just closing the fill polygon on the
   axis which lies in the direction towards the zero value.
 
   \a upperKey will be the key (in pixels) of the returned point. Depending on whether the key
   axis is horizontal or vertical, \a upperKey will end up as the x or y value of the returned
   point, respectively.
 
   \see lowerFillBasePoint, addFillBasePoints
 */
 QPointF QCPGraph::upperFillBasePoint(double upperKey) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return QPointF();
     }
 
     QPointF point;
     if (valueAxis->scaleType() == QCPAxis::stLinear)
     {
         if (keyAxis->axisType() == QCPAxis::atLeft)
         {
             point.setX(valueAxis->coordToPixel(0));
             point.setY(upperKey);
         }
         else if (keyAxis->axisType() == QCPAxis::atRight)
         {
             point.setX(valueAxis->coordToPixel(0));
             point.setY(upperKey);
         }
         else if (keyAxis->axisType() == QCPAxis::atTop)
         {
             point.setX(upperKey);
             point.setY(valueAxis->coordToPixel(0));
         }
         else if (keyAxis->axisType() == QCPAxis::atBottom)
         {
             point.setX(upperKey);
             point.setY(valueAxis->coordToPixel(0));
         }
     }
     else // valueAxis->mScaleType == QCPAxis::stLogarithmic
     {
         // In logarithmic scaling we can't just draw to value 0 so we just fill all the way
         // to the axis which is in the direction towards 0
         if (keyAxis->orientation() == Qt::Vertical)
         {
             if ((valueAxis->range().upper < 0 && !valueAxis->rangeReversed()) ||
                 (valueAxis->range().upper > 0 &&
                  valueAxis->rangeReversed())) // if range is negative, zero is on opposite side of key axis
                 point.setX(keyAxis->axisRect()->right());
             else
                 point.setX(keyAxis->axisRect()->left());
             point.setY(upperKey);
         }
         else if (keyAxis->axisType() == QCPAxis::atTop || keyAxis->axisType() == QCPAxis::atBottom)
         {
             point.setX(upperKey);
             if ((valueAxis->range().upper < 0 && !valueAxis->rangeReversed()) ||
                 (valueAxis->range().upper > 0 &&
                  valueAxis->rangeReversed())) // if range is negative, zero is on opposite side of key axis
                 point.setY(keyAxis->axisRect()->top());
             else
                 point.setY(keyAxis->axisRect()->bottom());
         }
     }
     return point;
 }
 
 /*! \internal
 
   Generates the polygon needed for drawing channel fills between this graph and the graph specified
   in \a mChannelFillGraph (see \ref setChannelFillGraph). The data points representing the line of
   this graph in pixel coordinates must be passed in \a lines, the corresponding points of the other
   graph are generated by calling its \ref getLines method.
 
   This method may return an empty polygon if the key ranges of the two graphs have no overlap of if
   they don't have the same orientation (e.g. one key axis vertical, the other horizontal). For
   increased performance (due to implicit sharing), it is recommended to keep the returned QPolygonF
   const.
 */
 const QPolygonF QCPGraph::getChannelFillPolygon(const QVector<QPointF> *lines) const
 {
     if (!mChannelFillGraph)
         return QPolygonF();
 
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return QPolygonF();
     }
     if (!mChannelFillGraph.data()->mKeyAxis)
     {
         qDebug() << Q_FUNC_INFO << "channel fill target key axis invalid";
         return QPolygonF();
     }
 
     if (mChannelFillGraph.data()->mKeyAxis.data()->orientation() != keyAxis->orientation())
         return QPolygonF(); // don't have same axis orientation, can't fill that (Note: if keyAxis fits, valueAxis will fit too, because it's always orthogonal to keyAxis)
 
     if (lines->isEmpty())
         return QPolygonF();
     QVector<QPointF> otherData;
     mChannelFillGraph.data()->getLines(&otherData, QCPDataRange(0, mChannelFillGraph.data()->dataCount()));
     if (otherData.isEmpty())
         return QPolygonF();
     QVector<QPointF> thisData;
     thisData.reserve(lines->size() + otherData.size()); // because we will join both vectors at end of this function
     for (
         int i = 0; i < lines->size();
         ++i) // don't use the vector<<(vector),  it squeezes internally, which ruins the performance tuning with reserve()
         thisData << lines->at(i);
 
     // pointers to be able to swap them, depending which data range needs cropping:
     QVector<QPointF> *staticData  = &thisData;
     QVector<QPointF> *croppedData = &otherData;
 
     // crop both vectors to ranges in which the keys overlap (which coord is key, depends on axisType):
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         // x is key
         // if an axis range is reversed, the data point keys will be descending. Reverse them, since following algorithm assumes ascending keys:
         if (staticData->first().x() > staticData->last().x())
         {
             int size = staticData->size();
             for (int i = 0; i < size / 2; ++i)
                 qSwap((*staticData)[i], (*staticData)[size - 1 - i]);
         }
         if (croppedData->first().x() > croppedData->last().x())
         {
             int size = croppedData->size();
             for (int i = 0; i < size / 2; ++i)
                 qSwap((*croppedData)[i], (*croppedData)[size - 1 - i]);
         }
         // crop lower bound:
         if (staticData->first().x() < croppedData->first().x()) // other one must be cropped
             qSwap(staticData, croppedData);
         int lowBound = findIndexBelowX(croppedData, staticData->first().x());
         if (lowBound == -1)
             return QPolygonF(); // key ranges have no overlap
         croppedData->remove(0, lowBound);
         // set lowest point of cropped data to fit exactly key position of first static data
         // point via linear interpolation:
         if (croppedData->size() < 2)
             return QPolygonF(); // need at least two points for interpolation
         double slope;
         if (croppedData->at(1).x() - croppedData->at(0).x() != 0)
             slope =
                 (croppedData->at(1).y() - croppedData->at(0).y()) / (croppedData->at(1).x() - croppedData->at(0).x());
         else
             slope = 0;
         (*croppedData)[0].setY(croppedData->at(0).y() + slope * (staticData->first().x() - croppedData->at(0).x()));
         (*croppedData)[0].setX(staticData->first().x());
 
         // crop upper bound:
         if (staticData->last().x() > croppedData->last().x()) // other one must be cropped
             qSwap(staticData, croppedData);
         int highBound = findIndexAboveX(croppedData, staticData->last().x());
         if (highBound == -1)
             return QPolygonF(); // key ranges have no overlap
         croppedData->remove(highBound + 1, croppedData->size() - (highBound + 1));
         // set highest point of cropped data to fit exactly key position of last static data
         // point via linear interpolation:
         if (croppedData->size() < 2)
             return QPolygonF();           // need at least two points for interpolation
         int li = croppedData->size() - 1; // last index
         if (croppedData->at(li).x() - croppedData->at(li - 1).x() != 0)
             slope = (croppedData->at(li).y() - croppedData->at(li - 1).y()) /
                     (croppedData->at(li).x() - croppedData->at(li - 1).x());
         else
             slope = 0;
         (*croppedData)[li].setY(croppedData->at(li - 1).y() +
                                 slope * (staticData->last().x() - croppedData->at(li - 1).x()));
         (*croppedData)[li].setX(staticData->last().x());
     }
     else // mKeyAxis->orientation() == Qt::Vertical
     {
         // y is key
         // similar to "x is key" but switched x,y. Further, lower/upper meaning is inverted compared to x,
         // because in pixel coordinates, y increases from top to bottom, not bottom to top like data coordinate.
         // if an axis range is reversed, the data point keys will be descending. Reverse them, since following algorithm assumes ascending keys:
         if (staticData->first().y() < staticData->last().y())
         {
             int size = staticData->size();
             for (int i = 0; i < size / 2; ++i)
                 qSwap((*staticData)[i], (*staticData)[size - 1 - i]);
         }
         if (croppedData->first().y() < croppedData->last().y())
         {
             int size = croppedData->size();
             for (int i = 0; i < size / 2; ++i)
                 qSwap((*croppedData)[i], (*croppedData)[size - 1 - i]);
         }
         // crop lower bound:
         if (staticData->first().y() > croppedData->first().y()) // other one must be cropped
             qSwap(staticData, croppedData);
         int lowBound = findIndexAboveY(croppedData, staticData->first().y());
         if (lowBound == -1)
             return QPolygonF(); // key ranges have no overlap
         croppedData->remove(0, lowBound);
         // set lowest point of cropped data to fit exactly key position of first static data
         // point via linear interpolation:
         if (croppedData->size() < 2)
             return QPolygonF(); // need at least two points for interpolation
         double slope;
         if (croppedData->at(1).y() - croppedData->at(0).y() != 0) // avoid division by zero in step plots
             slope =
                 (croppedData->at(1).x() - croppedData->at(0).x()) / (croppedData->at(1).y() - croppedData->at(0).y());
         else
             slope = 0;
         (*croppedData)[0].setX(croppedData->at(0).x() + slope * (staticData->first().y() - croppedData->at(0).y()));
         (*croppedData)[0].setY(staticData->first().y());
 
         // crop upper bound:
         if (staticData->last().y() < croppedData->last().y()) // other one must be cropped
             qSwap(staticData, croppedData);
         int highBound = findIndexBelowY(croppedData, staticData->last().y());
         if (highBound == -1)
             return QPolygonF(); // key ranges have no overlap
         croppedData->remove(highBound + 1, croppedData->size() - (highBound + 1));
         // set highest point of cropped data to fit exactly key position of last static data
         // point via linear interpolation:
         if (croppedData->size() < 2)
             return QPolygonF();                                         // need at least two points for interpolation
         int li = croppedData->size() - 1;                               // last index
         if (croppedData->at(li).y() - croppedData->at(li - 1).y() != 0) // avoid division by zero in step plots
             slope = (croppedData->at(li).x() - croppedData->at(li - 1).x()) /
                     (croppedData->at(li).y() - croppedData->at(li - 1).y());
         else
             slope = 0;
         (*croppedData)[li].setX(croppedData->at(li - 1).x() +
                                 slope * (staticData->last().y() - croppedData->at(li - 1).y()));
         (*croppedData)[li].setY(staticData->last().y());
     }
 
     // return joined:
     for (int i = otherData.size() - 1; i >= 0; --i) // insert reversed, otherwise the polygon will be twisted
         thisData << otherData.at(i);
     return QPolygonF(thisData);
 }
 
 /*! \internal
 
   Finds the smallest index of \a data, whose points x value is just above \a x. Assumes x values in
   \a data points are ordered ascending, as is the case when plotting with horizontal key axis.
 
   Used to calculate the channel fill polygon, see \ref getChannelFillPolygon.
 */
 int QCPGraph::findIndexAboveX(const QVector<QPointF> *data, double x) const
 {
     for (int i = data->size() - 1; i >= 0; --i)
     {
         if (data->at(i).x() < x)
         {
             if (i < data->size() - 1)
                 return i + 1;
             else
                 return data->size() - 1;
         }
     }
     return -1;
 }
 
 /*! \internal
 
   Finds the highest index of \a data, whose points x value is just below \a x. Assumes x values in
   \a data points are ordered ascending, as is the case when plotting with horizontal key axis.
 
   Used to calculate the channel fill polygon, see \ref getChannelFillPolygon.
 */
 int QCPGraph::findIndexBelowX(const QVector<QPointF> *data, double x) const
 {
     for (int i = 0; i < data->size(); ++i)
     {
         if (data->at(i).x() > x)
         {
             if (i > 0)
                 return i - 1;
             else
                 return 0;
         }
     }
     return -1;
 }
 
 /*! \internal
 
   Finds the smallest index of \a data, whose points y value is just above \a y. Assumes y values in
   \a data points are ordered descending, as is the case when plotting with vertical key axis.
 
   Used to calculate the channel fill polygon, see \ref getChannelFillPolygon.
 */
 int QCPGraph::findIndexAboveY(const QVector<QPointF> *data, double y) const
 {
     for (int i = 0; i < data->size(); ++i)
     {
         if (data->at(i).y() < y)
         {
             if (i > 0)
                 return i - 1;
             else
                 return 0;
         }
     }
     return -1;
 }
 
 /*! \internal
 
   Calculates the minimum distance in pixels the graph's representation has from the given \a
   pixelPoint. This is used to determine whether the graph was clicked or not, e.g. in \ref
   selectTest. The closest data point to \a pixelPoint is returned in \a closestData. Note that if
   the graph has a line representation, the returned distance may be smaller than the distance to
   the \a closestData point, since the distance to the graph line is also taken into account.
 
   If either the graph has no data or if the line style is \ref lsNone and the scatter style's shape
   is \ref QCPScatterStyle::ssNone (i.e. there is no visual representation of the graph), returns -1.0.
 */
 double QCPGraph::pointDistance(const QPointF &pixelPoint, QCPGraphDataContainer::const_iterator &closestData) const
 {
     closestData = mDataContainer->constEnd();
     if (mDataContainer->isEmpty())
         return -1.0;
     if (mLineStyle == lsNone && mScatterStyle.isNone())
         return -1.0;
 
     // calculate minimum distances to graph data points and find closestData iterator:
     double minDistSqr = std::numeric_limits<double>::max();
     // determine which key range comes into question, taking selection tolerance around pos into account:
     double posKeyMin, posKeyMax, dummy;
     pixelsToCoords(pixelPoint - QPointF(mParentPlot->selectionTolerance(), mParentPlot->selectionTolerance()),
                    posKeyMin, dummy);
     pixelsToCoords(pixelPoint + QPointF(mParentPlot->selectionTolerance(), mParentPlot->selectionTolerance()),
                    posKeyMax, dummy);
     if (posKeyMin > posKeyMax)
         qSwap(posKeyMin, posKeyMax);
     // iterate over found data points and then choose the one with the shortest distance to pos:
     QCPGraphDataContainer::const_iterator begin = mDataContainer->findBegin(posKeyMin, true);
     QCPGraphDataContainer::const_iterator end   = mDataContainer->findEnd(posKeyMax, true);
     for (QCPGraphDataContainer::const_iterator it = begin; it != end; ++it)
     {
         const double currentDistSqr = QCPVector2D(coordsToPixels(it->key, it->value) - pixelPoint).lengthSquared();
         if (currentDistSqr < minDistSqr)
         {
             minDistSqr  = currentDistSqr;
             closestData = it;
         }
     }
 
     // calculate distance to graph line if there is one (if so, will probably be smaller than distance to closest data point):
     if (mLineStyle != lsNone)
     {
         // line displayed, calculate distance to line segments:
         QVector<QPointF> lineData;
         getLines(&lineData, QCPDataRange(0, dataCount()));
         QCPVector2D p(pixelPoint);
         const int step =
             mLineStyle == lsImpulse ?
                 2 :
                 1; // impulse plot differs from other line styles in that the lineData points are only pairwise connected
         for (int i = 0; i < lineData.size() - 1; i += step)
         {
             const double currentDistSqr = p.distanceSquaredToLine(lineData.at(i), lineData.at(i + 1));
             if (currentDistSqr < minDistSqr)
                 minDistSqr = currentDistSqr;
         }
     }
 
     return qSqrt(minDistSqr);
 }
 
 /*! \internal
 
   Finds the highest index of \a data, whose points y value is just below \a y. Assumes y values in
   \a data points are ordered descending, as is the case when plotting with vertical key axis (since
   keys are ordered ascending).
 
   Used to calculate the channel fill polygon, see \ref getChannelFillPolygon.
 */
 int QCPGraph::findIndexBelowY(const QVector<QPointF> *data, double y) const
 {
     for (int i = data->size() - 1; i >= 0; --i)
     {
         if (data->at(i).y() > y)
         {
             if (i < data->size() - 1)
                 return i + 1;
             else
                 return data->size() - 1;
         }
     }
     return -1;
 }
 /* end of 'src/plottables/plottable-graph.cpp' */
 
 /* including file 'src/plottables/plottable-curve.cpp', size 60009           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPCurveData
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPCurveData
   \brief Holds the data of one single data point for QCPCurve.
 
   The stored data is:
   \li \a t: the free ordering parameter of this curve point, like in the mathematical vector <em>(x(t), y(t))</em>. (This is the \a sortKey)
   \li \a key: coordinate on the key axis of this curve point (this is the \a mainKey)
   \li \a value: coordinate on the value axis of this curve point (this is the \a mainValue)
 
   The container for storing multiple data points is \ref QCPCurveDataContainer. It is a typedef for
   \ref QCPDataContainer with \ref QCPCurveData as the DataType template parameter. See the
   documentation there for an explanation regarding the data type's generic methods.
 
   \see QCPCurveDataContainer
 */
 
 /* start documentation of inline functions */
 
 /*! \fn double QCPCurveData::sortKey() const
 
   Returns the \a t member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static QCPCurveData QCPCurveData::fromSortKey(double sortKey)
 
   Returns a data point with the specified \a sortKey (assigned to the data point's \a t member).
   All other members are set to zero.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static static bool QCPCurveData::sortKeyIsMainKey()
 
   Since the member \a key is the data point key coordinate and the member \a t is the data ordering
   parameter, this method returns false.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPCurveData::mainKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPCurveData::mainValue() const
 
   Returns the \a value member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn QCPRange QCPCurveData::valueRange() const
 
   Returns a QCPRange with both lower and upper boundary set to \a value of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Constructs a curve data point with t, key and value set to zero.
 */
 QCPCurveData::QCPCurveData() : t(0), key(0), value(0)
 {
 }
 
 /*!
   Constructs a curve data point with the specified \a t, \a key and \a value.
 */
 QCPCurveData::QCPCurveData(double t, double key, double value) : t(t), key(key), value(value)
 {
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPCurve
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPCurve
   \brief A plottable representing a parametric curve in a plot.
 
   \image html QCPCurve.png
 
   Unlike QCPGraph, plottables of this type may have multiple points with the same key coordinate,
   so their visual representation can have \a loops. This is realized by introducing a third
   coordinate \a t, which defines the order of the points described by the other two coordinates \a
   x and \a y.
 
   To plot data, assign it with the \ref setData or \ref addData functions. Alternatively, you can
   also access and modify the curve's data via the \ref data method, which returns a pointer to the
   internal \ref QCPCurveDataContainer.
 
   Gaps in the curve can be created by adding data points with NaN as key and value
   (<tt>qQNaN()</tt> or <tt>std::numeric_limits<double>::quiet_NaN()</tt>) in between the two data points that shall be
   separated.
 
   \section qcpcurve-appearance Changing the appearance
 
   The appearance of the curve is determined by the pen and the brush (\ref setPen, \ref setBrush).
 
   \section qcpcurve-usage Usage
 
   Like all data representing objects in QCustomPlot, the QCPCurve is a plottable
   (QCPAbstractPlottable). So the plottable-interface of QCustomPlot applies
   (QCustomPlot::plottable, QCustomPlot::removePlottable, etc.)
 
   Usually, you first create an instance:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcurve-creation-1
   which registers it with the QCustomPlot instance of the passed axes. Note that this QCustomPlot instance takes
   ownership of the plottable, so do not delete it manually but use QCustomPlot::removePlottable() instead.
   The newly created plottable can be modified, e.g.:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcurve-creation-2
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QSharedPointer<QCPCurveDataContainer> QCPCurve::data() const
 
   Returns a shared pointer to the internal data storage of type \ref QCPCurveDataContainer. You may
   use it to directly manipulate the data, which may be more convenient and faster than using the
   regular \ref setData or \ref addData methods.
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs a curve which uses \a keyAxis as its key axis ("x") and \a valueAxis as its value
   axis ("y"). \a keyAxis and \a valueAxis must reside in the same QCustomPlot instance and not have
   the same orientation. If either of these restrictions is violated, a corresponding message is
   printed to the debug output (qDebug), the construction is not aborted, though.
 
   The created QCPCurve is automatically registered with the QCustomPlot instance inferred from \a
   keyAxis. This QCustomPlot instance takes ownership of the QCPCurve, so do not delete it manually
   but use QCustomPlot::removePlottable() instead.
 */
 QCPCurve::QCPCurve(QCPAxis *keyAxis, QCPAxis *valueAxis) : QCPAbstractPlottable1D<QCPCurveData>(keyAxis, valueAxis)
 {
     // modify inherited properties from abstract plottable:
     setPen(QPen(Qt::blue, 0));
     setBrush(Qt::NoBrush);
 
     setScatterStyle(QCPScatterStyle());
     setLineStyle(lsLine);
 }
 
 QCPCurve::~QCPCurve()
 {
 }
 
 /*! \overload
 
   Replaces the current data container with the provided \a data container.
 
   Since a QSharedPointer is used, multiple QCPCurves may share the same data container safely.
   Modifying the data in the container will then affect all curves that share the container. Sharing
   can be achieved by simply exchanging the data containers wrapped in shared pointers:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcurve-datasharing-1
 
   If you do not wish to share containers, but create a copy from an existing container, rather use
   the \ref QCPDataContainer<DataType>::set method on the curve's data container directly:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcurve-datasharing-2
 
   \see addData
 */
 void QCPCurve::setData(QSharedPointer<QCPCurveDataContainer> data)
 {
     mDataContainer = data;
 }
 
 /*! \overload
 
   Replaces the current data with the provided points in \a t, \a keys and \a values. The provided
   vectors should have equal length. Else, the number of added points will be the size of the
   smallest vector.
 
   If you can guarantee that the passed data points are sorted by \a t in ascending order, you can
   set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   \see addData
 */
 void QCPCurve::setData(const QVector<double> &t, const QVector<double> &keys, const QVector<double> &values,
                        bool alreadySorted)
 {
     mDataContainer->clear();
     addData(t, keys, values, alreadySorted);
 }
 
 /*! \overload
 
   Replaces the current data with the provided points in \a keys and \a values. The provided vectors
   should have equal length. Else, the number of added points will be the size of the smallest
   vector.
 
   The t parameter of each data point will be set to the integer index of the respective key/value
   pair.
 
   \see addData
 */
 void QCPCurve::setData(const QVector<double> &keys, const QVector<double> &values)
 {
     mDataContainer->clear();
     addData(keys, values);
 }
 
 /*!
   Sets the visual appearance of single data points in the plot. If set to \ref
   QCPScatterStyle::ssNone, no scatter points are drawn (e.g. for line-only plots with appropriate
   line style).
 
   \see QCPScatterStyle, setLineStyle
 */
 void QCPCurve::setScatterStyle(const QCPScatterStyle &style)
 {
     mScatterStyle = style;
 }
 
 /*!
   If scatters are displayed (scatter style not \ref QCPScatterStyle::ssNone), \a skip number of
   scatter points are skipped/not drawn after every drawn scatter point.
 
   This can be used to make the data appear sparser while for example still having a smooth line,
   and to improve performance for very high density plots.
 
   If \a skip is set to 0 (default), all scatter points are drawn.
 
   \see setScatterStyle
 */
 void QCPCurve::setScatterSkip(int skip)
 {
     mScatterSkip = qMax(0, skip);
 }
 
 /*!
   Sets how the single data points are connected in the plot or how they are represented visually
   apart from the scatter symbol. For scatter-only plots, set \a style to \ref lsNone and \ref
   setScatterStyle to the desired scatter style.
 
   \see setScatterStyle
 */
 void QCPCurve::setLineStyle(QCPCurve::LineStyle style)
 {
     mLineStyle = style;
 }
 
 /*! \overload
 
   Adds the provided points in \a t, \a keys and \a values to the current data. The provided vectors
   should have equal length. Else, the number of added points will be the size of the smallest
   vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPCurve::addData(const QVector<double> &t, const QVector<double> &keys, const QVector<double> &values,
                        bool alreadySorted)
 {
     if (t.size() != keys.size() || t.size() != values.size())
         qDebug() << Q_FUNC_INFO << "ts, keys and values have different sizes:" << t.size() << keys.size()
                  << values.size();
     const int n = qMin(qMin(t.size(), keys.size()), values.size());
     QVector<QCPCurveData> tempData(n);
     QVector<QCPCurveData>::iterator it          = tempData.begin();
     const QVector<QCPCurveData>::iterator itEnd = tempData.end();
     int i                                       = 0;
     while (it != itEnd)
     {
         it->t     = t[i];
         it->key   = keys[i];
         it->value = values[i];
         ++it;
         ++i;
     }
     mDataContainer->add(tempData, alreadySorted); // don't modify tempData beyond this to prevent copy on write
 }
 
 /*! \overload
 
   Adds the provided points in \a keys and \a values to the current data. The provided vectors
   should have equal length. Else, the number of added points will be the size of the smallest
   vector.
 
   The t parameter of each data point will be set to the integer index of the respective key/value
   pair.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPCurve::addData(const QVector<double> &keys, const QVector<double> &values)
 {
     if (keys.size() != values.size())
         qDebug() << Q_FUNC_INFO << "keys and values have different sizes:" << keys.size() << values.size();
     const int n = qMin(keys.size(), values.size());
     double tStart;
     if (!mDataContainer->isEmpty())
         tStart = (mDataContainer->constEnd() - 1)->t + 1.0;
     else
         tStart = 0;
     QVector<QCPCurveData> tempData(n);
     QVector<QCPCurveData>::iterator it          = tempData.begin();
     const QVector<QCPCurveData>::iterator itEnd = tempData.end();
     int i                                       = 0;
     while (it != itEnd)
     {
         it->t     = tStart + i;
         it->key   = keys[i];
         it->value = values[i];
         ++it;
         ++i;
     }
     mDataContainer->add(tempData, true); // don't modify tempData beyond this to prevent copy on write
 }
 
 /*! \overload
   Adds the provided data point as \a t, \a key and \a value to the current data.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPCurve::addData(double t, double key, double value)
 {
     mDataContainer->add(QCPCurveData(t, key, value));
 }
 
 /*! \overload
 
   Adds the provided data point as \a key and \a value to the current data.
 
   The t parameter is generated automatically by increments of 1 for each point, starting at the
   highest t of previously existing data or 0, if the curve data is empty.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPCurve::addData(double key, double value)
 {
     if (!mDataContainer->isEmpty())
         mDataContainer->add(QCPCurveData((mDataContainer->constEnd() - 1)->t + 1.0, key, value));
     else
         mDataContainer->add(QCPCurveData(0.0, key, value));
 }
 
 /* inherits documentation from base class */
 double QCPCurve::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     if (mKeyAxis.data()->axisRect()->rect().contains(pos.toPoint()))
     {
         QCPCurveDataContainer::const_iterator closestDataPoint = mDataContainer->constEnd();
         double result                                          = pointDistance(pos, closestDataPoint);
         if (details)
         {
             int pointIndex = closestDataPoint - mDataContainer->constBegin();
             details->setValue(QCPDataSelection(QCPDataRange(pointIndex, pointIndex + 1)));
         }
         return result;
     }
     else
         return -1;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPCurve::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const
 {
     return mDataContainer->keyRange(foundRange, inSignDomain);
 }
 
 /* inherits documentation from base class */
 QCPRange QCPCurve::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain, const QCPRange &inKeyRange) const
 {
     return mDataContainer->valueRange(foundRange, inSignDomain, inKeyRange);
 }
 
 /* inherits documentation from base class */
 void QCPCurve::draw(QCPPainter *painter)
 {
     if (mDataContainer->isEmpty())
         return;
 
     // allocate line vector:
     QVector<QPointF> lines, scatters;
 
     // loop over and draw segments of unselected/selected data:
     QList<QCPDataRange> selectedSegments, unselectedSegments, allSegments;
     getDataSegments(selectedSegments, unselectedSegments);
     allSegments << unselectedSegments << selectedSegments;
     for (int i = 0; i < allSegments.size(); ++i)
     {
         bool isSelectedSegment = i >= unselectedSegments.size();
 
         // fill with curve data:
         QPen finalCurvePen =
             mPen; // determine the final pen already here, because the line optimization depends on its stroke width
         if (isSelectedSegment && mSelectionDecorator)
             finalCurvePen = mSelectionDecorator->pen();
 
         QCPDataRange lineDataRange =
             isSelectedSegment ?
                 allSegments.at(i) :
                 allSegments.at(i).adjusted(
                     -1,
                     1); // unselected segments extend lines to bordering selected data point (safe to exceed total data bounds in first/last segment, getCurveLines takes care)
         getCurveLines(&lines, lineDataRange, finalCurvePen.widthF());
 
 // check data validity if flag set:
 #ifdef QCUSTOMPLOT_CHECK_DATA
         for (QCPCurveDataContainer::const_iterator it = mDataContainer->constBegin(); it != mDataContainer->constEnd();
              ++it)
         {
             if (QCP::isInvalidData(it->t) || QCP::isInvalidData(it->key, it->value))
                 qDebug() << Q_FUNC_INFO << "Data point at" << it->key << "invalid."
                          << "Plottable name:" << name();
         }
 #endif
 
         // draw curve fill:
         applyFillAntialiasingHint(painter);
         if (isSelectedSegment && mSelectionDecorator)
             mSelectionDecorator->applyBrush(painter);
         else
             painter->setBrush(mBrush);
         painter->setPen(Qt::NoPen);
         if (painter->brush().style() != Qt::NoBrush && painter->brush().color().alpha() != 0)
             painter->drawPolygon(QPolygonF(lines));
 
         // draw curve line:
         if (mLineStyle != lsNone)
         {
             painter->setPen(finalCurvePen);
             painter->setBrush(Qt::NoBrush);
             drawCurveLine(painter, lines);
         }
 
         // draw scatters:
         QCPScatterStyle finalScatterStyle = mScatterStyle;
         if (isSelectedSegment && mSelectionDecorator)
             finalScatterStyle = mSelectionDecorator->getFinalScatterStyle(mScatterStyle);
         if (!finalScatterStyle.isNone())
         {
             getScatters(&scatters, allSegments.at(i), finalScatterStyle.size());
             drawScatterPlot(painter, scatters, finalScatterStyle);
         }
     }
 
     // draw other selection decoration that isn't just line/scatter pens and brushes:
     if (mSelectionDecorator)
         mSelectionDecorator->drawDecoration(painter, selection());
 }
 
 /* inherits documentation from base class */
 void QCPCurve::drawLegendIcon(QCPPainter *painter, const QRectF &rect) const
 {
     // draw fill:
     if (mBrush.style() != Qt::NoBrush)
     {
         applyFillAntialiasingHint(painter);
         painter->fillRect(QRectF(rect.left(), rect.top() + rect.height() / 2.0, rect.width(), rect.height() / 3.0),
                           mBrush);
     }
     // draw line vertically centered:
     if (mLineStyle != lsNone)
     {
         applyDefaultAntialiasingHint(painter);
         painter->setPen(mPen);
         painter->drawLine(
             QLineF(rect.left(), rect.top() + rect.height() / 2.0, rect.right() + 5,
                    rect.top() + rect.height() / 2.0)); // +5 on x2 else last segment is missing from dashed/dotted pens
     }
     // draw scatter symbol:
     if (!mScatterStyle.isNone())
     {
         applyScattersAntialiasingHint(painter);
         // scale scatter pixmap if it's too large to fit in legend icon rect:
         if (mScatterStyle.shape() == QCPScatterStyle::ssPixmap &&
             (mScatterStyle.pixmap().size().width() > rect.width() ||
              mScatterStyle.pixmap().size().height() > rect.height()))
         {
             QCPScatterStyle scaledStyle(mScatterStyle);
             scaledStyle.setPixmap(
                 scaledStyle.pixmap().scaled(rect.size().toSize(), Qt::KeepAspectRatio, Qt::SmoothTransformation));
             scaledStyle.applyTo(painter, mPen);
             scaledStyle.drawShape(painter, QRectF(rect).center());
         }
         else
         {
             mScatterStyle.applyTo(painter, mPen);
             mScatterStyle.drawShape(painter, QRectF(rect).center());
         }
     }
 }
 
 /*!  \internal
 
   Draws lines between the points in \a lines, given in pixel coordinates.
 
   \see drawScatterPlot, getCurveLines
 */
 void QCPCurve::drawCurveLine(QCPPainter *painter, const QVector<QPointF> &lines) const
 {
     if (painter->pen().style() != Qt::NoPen && painter->pen().color().alpha() != 0)
     {
         applyDefaultAntialiasingHint(painter);
         drawPolyline(painter, lines);
     }
 }
 
 /*! \internal
 
   Draws scatter symbols at every point passed in \a points, given in pixel coordinates. The
   scatters will be drawn with \a painter and have the appearance as specified in \a style.
 
   \see drawCurveLine, getCurveLines
 */
 void QCPCurve::drawScatterPlot(QCPPainter *painter, const QVector<QPointF> &points, const QCPScatterStyle &style) const
 {
     // draw scatter point symbols:
     applyScattersAntialiasingHint(painter);
     style.applyTo(painter, mPen);
     for (int i = 0; i < points.size(); ++i)
         if (!qIsNaN(points.at(i).x()) && !qIsNaN(points.at(i).y()))
             style.drawShape(painter, points.at(i));
 }
 
 /*! \internal
 
   Called by \ref draw to generate points in pixel coordinates which represent the line of the
   curve.
 
   Line segments that aren't visible in the current axis rect are handled in an optimized way. They
   are projected onto a rectangle slightly larger than the visible axis rect and simplified
   regarding point count. The algorithm makes sure to preserve appearance of lines and fills inside
   the visible axis rect by generating new temporary points on the outer rect if necessary.
 
   \a lines will be filled with points in pixel coordinates, that can be drawn with \ref
   drawCurveLine.
 
   \a dataRange specifies the beginning and ending data indices that will be taken into account for
   conversion. In this function, the specified range may exceed the total data bounds without harm:
   a correspondingly trimmed data range will be used. This takes the burden off the user of this
   function to check for valid indices in \a dataRange, e.g. when extending ranges coming from \ref
   getDataSegments.
 
   \a penWidth specifies the pen width that will be used to later draw the lines generated by this
   function. This is needed here to calculate an accordingly wider margin around the axis rect when
   performing the line optimization.
 
   Methods that are also involved in the algorithm are: \ref getRegion, \ref getOptimizedPoint, \ref
   getOptimizedCornerPoints \ref mayTraverse, \ref getTraverse, \ref getTraverseCornerPoints.
 
   \see drawCurveLine, drawScatterPlot
 */
 void QCPCurve::getCurveLines(QVector<QPointF> *lines, const QCPDataRange &dataRange, double penWidth) const
 {
     if (!lines)
         return;
     lines->clear();
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     // add margins to rect to compensate for stroke width
     const double strokeMargin = qMax(qreal(1.0), qreal(penWidth * 0.75)); // stroke radius + 50% safety
     const double keyMin       = keyAxis->pixelToCoord(keyAxis->coordToPixel(keyAxis->range().lower) -
                                                 strokeMargin * keyAxis->pixelOrientation());
     const double keyMax       = keyAxis->pixelToCoord(keyAxis->coordToPixel(keyAxis->range().upper) +
                                                 strokeMargin * keyAxis->pixelOrientation());
     const double valueMin     = valueAxis->pixelToCoord(valueAxis->coordToPixel(valueAxis->range().lower) -
                                                     strokeMargin * valueAxis->pixelOrientation());
     const double valueMax     = valueAxis->pixelToCoord(valueAxis->coordToPixel(valueAxis->range().upper) +
                                                     strokeMargin * valueAxis->pixelOrientation());
     QCPCurveDataContainer::const_iterator itBegin = mDataContainer->constBegin();
     QCPCurveDataContainer::const_iterator itEnd   = mDataContainer->constEnd();
     mDataContainer->limitIteratorsToDataRange(itBegin, itEnd, dataRange);
     if (itBegin == itEnd)
         return;
     QCPCurveDataContainer::const_iterator it     = itBegin;
     QCPCurveDataContainer::const_iterator prevIt = itEnd - 1;
     int prevRegion = getRegion(prevIt->key, prevIt->value, keyMin, valueMax, keyMax, valueMin);
     QVector<QPointF>
         trailingPoints; // points that must be applied after all other points (are generated only when handling first point to get virtual segment between last and first point right)
     while (it != itEnd)
     {
         const int currentRegion = getRegion(it->key, it->value, keyMin, valueMax, keyMax, valueMin);
         if (currentRegion !=
             prevRegion) // changed region, possibly need to add some optimized edge points or original points if entering R
         {
             if (currentRegion != 5) // segment doesn't end in R, so it's a candidate for removal
             {
                 QPointF crossA, crossB;
                 if (prevRegion == 5) // we're coming from R, so add this point optimized
                 {
                     lines->append(getOptimizedPoint(currentRegion, it->key, it->value, prevIt->key, prevIt->value,
                                                     keyMin, valueMax, keyMax, valueMin));
                     // in the situations 5->1/7/9/3 the segment may leave R and directly cross through two outer regions. In these cases we need to add an additional corner point
                     *lines << getOptimizedCornerPoints(prevRegion, currentRegion, prevIt->key, prevIt->value, it->key,
                                                        it->value, keyMin, valueMax, keyMax, valueMin);
                 }
                 else if (mayTraverse(prevRegion, currentRegion) &&
                          getTraverse(prevIt->key, prevIt->value, it->key, it->value, keyMin, valueMax, keyMax, valueMin,
                                      crossA, crossB))
                 {
                     // add the two cross points optimized if segment crosses R and if segment isn't virtual zeroth segment between last and first curve point:
                     QVector<QPointF> beforeTraverseCornerPoints, afterTraverseCornerPoints;
                     getTraverseCornerPoints(prevRegion, currentRegion, keyMin, valueMax, keyMax, valueMin,
                                             beforeTraverseCornerPoints, afterTraverseCornerPoints);
                     if (it != itBegin)
                     {
                         *lines << beforeTraverseCornerPoints;
                         lines->append(crossA);
                         lines->append(crossB);
                         *lines << afterTraverseCornerPoints;
                     }
                     else
                     {
                         lines->append(crossB);
                         *lines << afterTraverseCornerPoints;
                         trailingPoints << beforeTraverseCornerPoints << crossA;
                     }
                 }
                 else // doesn't cross R, line is just moving around in outside regions, so only need to add optimized point(s) at the boundary corner(s)
                 {
                     *lines << getOptimizedCornerPoints(prevRegion, currentRegion, prevIt->key, prevIt->value, it->key,
                                                        it->value, keyMin, valueMax, keyMax, valueMin);
                 }
             }
             else // segment does end in R, so we add previous point optimized and this point at original position
             {
                 if (it ==
                     itBegin) // it is first point in curve and prevIt is last one. So save optimized point for adding it to the lineData in the end
                     trailingPoints << getOptimizedPoint(prevRegion, prevIt->key, prevIt->value, it->key, it->value,
                                                         keyMin, valueMax, keyMax, valueMin);
                 else
                     lines->append(getOptimizedPoint(prevRegion, prevIt->key, prevIt->value, it->key, it->value, keyMin,
                                                     valueMax, keyMax, valueMin));
                 lines->append(coordsToPixels(it->key, it->value));
             }
         }
         else // region didn't change
         {
             if (currentRegion == 5) // still in R, keep adding original points
             {
                 lines->append(coordsToPixels(it->key, it->value));
             }
             else // still outside R, no need to add anything
             {
                 // see how this is not doing anything? That's the main optimization...
             }
         }
         prevIt     = it;
         prevRegion = currentRegion;
         ++it;
     }
     *lines << trailingPoints;
 }
 
 /*! \internal
 
   Called by \ref draw to generate points in pixel coordinates which represent the scatters of the
   curve. If a scatter skip is configured (\ref setScatterSkip), the returned points are accordingly
   sparser.
 
   Scatters that aren't visible in the current axis rect are optimized away.
 
   \a scatters will be filled with points in pixel coordinates, that can be drawn with \ref
   drawScatterPlot.
 
   \a dataRange specifies the beginning and ending data indices that will be taken into account for
   conversion.
 
   \a scatterWidth specifies the scatter width that will be used to later draw the scatters at pixel
   coordinates generated by this function. This is needed here to calculate an accordingly wider
   margin around the axis rect when performing the data point reduction.
 
   \see draw, drawScatterPlot
 */
 void QCPCurve::getScatters(QVector<QPointF> *scatters, const QCPDataRange &dataRange, double scatterWidth) const
 {
     if (!scatters)
         return;
     scatters->clear();
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     QCPCurveDataContainer::const_iterator begin = mDataContainer->constBegin();
     QCPCurveDataContainer::const_iterator end   = mDataContainer->constEnd();
     mDataContainer->limitIteratorsToDataRange(begin, end, dataRange);
     if (begin == end)
         return;
     const int scatterModulo  = mScatterSkip + 1;
     const bool doScatterSkip = mScatterSkip > 0;
     int endIndex             = end - mDataContainer->constBegin();
 
     QCPRange keyRange   = keyAxis->range();
     QCPRange valueRange = valueAxis->range();
     // extend range to include width of scatter symbols:
     keyRange.lower =
         keyAxis->pixelToCoord(keyAxis->coordToPixel(keyRange.lower) - scatterWidth * keyAxis->pixelOrientation());
     keyRange.upper =
         keyAxis->pixelToCoord(keyAxis->coordToPixel(keyRange.upper) + scatterWidth * keyAxis->pixelOrientation());
     valueRange.lower = valueAxis->pixelToCoord(valueAxis->coordToPixel(valueRange.lower) -
                                                scatterWidth * valueAxis->pixelOrientation());
     valueRange.upper = valueAxis->pixelToCoord(valueAxis->coordToPixel(valueRange.upper) +
                                                scatterWidth * valueAxis->pixelOrientation());
 
     QCPCurveDataContainer::const_iterator it = begin;
     int itIndex                              = begin - mDataContainer->constBegin();
     while (doScatterSkip && it != end &&
            itIndex % scatterModulo != 0) // advance begin iterator to first non-skipped scatter
     {
         ++itIndex;
         ++it;
     }
     if (keyAxis->orientation() == Qt::Vertical)
     {
         while (it != end)
         {
             if (!qIsNaN(it->value) && keyRange.contains(it->key) && valueRange.contains(it->value))
                 scatters->append(QPointF(valueAxis->coordToPixel(it->value), keyAxis->coordToPixel(it->key)));
 
             // advance iterator to next (non-skipped) data point:
             if (!doScatterSkip)
                 ++it;
             else
             {
                 itIndex += scatterModulo;
                 if (itIndex < endIndex) // make sure we didn't jump over end
                     it += scatterModulo;
                 else
                 {
                     it      = end;
                     itIndex = endIndex;
                 }
             }
         }
     }
     else
     {
         while (it != end)
         {
             if (!qIsNaN(it->value) && keyRange.contains(it->key) && valueRange.contains(it->value))
                 scatters->append(QPointF(keyAxis->coordToPixel(it->key), valueAxis->coordToPixel(it->value)));
 
             // advance iterator to next (non-skipped) data point:
             if (!doScatterSkip)
                 ++it;
             else
             {
                 itIndex += scatterModulo;
                 if (itIndex < endIndex) // make sure we didn't jump over end
                     it += scatterModulo;
                 else
                 {
                     it      = end;
                     itIndex = endIndex;
                 }
             }
         }
     }
 }
 
 /*! \internal
 
   This function is part of the curve optimization algorithm of \ref getCurveLines.
 
   It returns the region of the given point (\a key, \a value) with respect to a rectangle defined
   by \a keyMin, \a keyMax, \a valueMin, and \a valueMax.
 
   The regions are enumerated from top to bottom (\a valueMin to \a valueMax) and left to right (\a
   keyMin to \a keyMax):
 
   <table style="width:10em; text-align:center">
     <tr><td>1</td><td>4</td><td>7</td></tr>
     <tr><td>2</td><td style="border:1px solid black">5</td><td>8</td></tr>
     <tr><td>3</td><td>6</td><td>9</td></tr>
   </table>
 
   With the rectangle being region 5, and the outer regions extending infinitely outwards. In the
   curve optimization algorithm, region 5 is considered to be the visible portion of the plot.
 */
 int QCPCurve::getRegion(double key, double value, double keyMin, double valueMax, double keyMax, double valueMin) const
 {
     if (key < keyMin) // region 123
     {
         if (value > valueMax)
             return 1;
         else if (value < valueMin)
             return 3;
         else
             return 2;
     }
     else if (key > keyMax) // region 789
     {
         if (value > valueMax)
             return 7;
         else if (value < valueMin)
             return 9;
         else
             return 8;
     }
     else // region 456
     {
         if (value > valueMax)
             return 4;
         else if (value < valueMin)
             return 6;
         else
             return 5;
     }
 }
 
 /*! \internal
 
   This function is part of the curve optimization algorithm of \ref getCurveLines.
 
   This method is used in case the current segment passes from inside the visible rect (region 5,
   see \ref getRegion) to any of the outer regions (\a otherRegion). The current segment is given by
   the line connecting (\a key, \a value) with (\a otherKey, \a otherValue).
 
   It returns the intersection point of the segment with the border of region 5.
 
   For this function it doesn't matter whether (\a key, \a value) is the point inside region 5 or
   whether it's (\a otherKey, \a otherValue), i.e. whether the segment is coming from region 5 or
   leaving it. It is important though that \a otherRegion correctly identifies the other region not
   equal to 5.
 */
 QPointF QCPCurve::getOptimizedPoint(int otherRegion, double otherKey, double otherValue, double key, double value,
                                     double keyMin, double valueMax, double keyMax, double valueMin) const
 {
     double intersectKey   = keyMin;   // initial value is just fail-safe
     double intersectValue = valueMax; // initial value is just fail-safe
     switch (otherRegion)
     {
         case 1: // top and left edge
         {
             intersectValue = valueMax;
             intersectKey   = otherKey + (key - otherKey) / (value - otherValue) * (intersectValue - otherValue);
             if (intersectKey < keyMin || intersectKey > keyMax) // doesn't intersect, so must intersect other:
             {
                 intersectKey   = keyMin;
                 intersectValue = otherValue + (value - otherValue) / (key - otherKey) * (intersectKey - otherKey);
             }
             break;
         }
         case 2: // left edge
         {
             intersectKey   = keyMin;
             intersectValue = otherValue + (value - otherValue) / (key - otherKey) * (intersectKey - otherKey);
             break;
         }
         case 3: // bottom and left edge
         {
             intersectValue = valueMin;
             intersectKey   = otherKey + (key - otherKey) / (value - otherValue) * (intersectValue - otherValue);
             if (intersectKey < keyMin || intersectKey > keyMax) // doesn't intersect, so must intersect other:
             {
                 intersectKey   = keyMin;
                 intersectValue = otherValue + (value - otherValue) / (key - otherKey) * (intersectKey - otherKey);
             }
             break;
         }
         case 4: // top edge
         {
             intersectValue = valueMax;
             intersectKey   = otherKey + (key - otherKey) / (value - otherValue) * (intersectValue - otherValue);
             break;
         }
         case 5:
         {
             break; // case 5 shouldn't happen for this function but we add it anyway to prevent potential discontinuity in branch table
         }
         case 6: // bottom edge
         {
             intersectValue = valueMin;
             intersectKey   = otherKey + (key - otherKey) / (value - otherValue) * (intersectValue - otherValue);
             break;
         }
         case 7: // top and right edge
         {
             intersectValue = valueMax;
             intersectKey   = otherKey + (key - otherKey) / (value - otherValue) * (intersectValue - otherValue);
             if (intersectKey < keyMin || intersectKey > keyMax) // doesn't intersect, so must intersect other:
             {
                 intersectKey   = keyMax;
                 intersectValue = otherValue + (value - otherValue) / (key - otherKey) * (intersectKey - otherKey);
             }
             break;
         }
         case 8: // right edge
         {
             intersectKey   = keyMax;
             intersectValue = otherValue + (value - otherValue) / (key - otherKey) * (intersectKey - otherKey);
             break;
         }
         case 9: // bottom and right edge
         {
             intersectValue = valueMin;
             intersectKey   = otherKey + (key - otherKey) / (value - otherValue) * (intersectValue - otherValue);
             if (intersectKey < keyMin || intersectKey > keyMax) // doesn't intersect, so must intersect other:
             {
                 intersectKey   = keyMax;
                 intersectValue = otherValue + (value - otherValue) / (key - otherKey) * (intersectKey - otherKey);
             }
             break;
         }
     }
     return coordsToPixels(intersectKey, intersectValue);
 }
 
 /*! \internal
 
   This function is part of the curve optimization algorithm of \ref getCurveLines.
 
   In situations where a single segment skips over multiple regions it might become necessary to add
   extra points at the corners of region 5 (see \ref getRegion) such that the optimized segment
   doesn't unintentionally cut through the visible area of the axis rect and create plot artifacts.
   This method provides these points that must be added, assuming the original segment doesn't
   start, end, or traverse region 5. (Corner points where region 5 is traversed are calculated by
   \ref getTraverseCornerPoints.)
 
   For example, consider a segment which directly goes from region 4 to 2 but originally is far out
   to the top left such that it doesn't cross region 5. Naively optimizing these points by
   projecting them on the top and left borders of region 5 will create a segment that surely crosses
   5, creating a visual artifact in the plot. This method prevents this by providing extra points at
   the top left corner, making the optimized curve correctly pass from region 4 to 1 to 2 without
   traversing 5.
 */
 QVector<QPointF> QCPCurve::getOptimizedCornerPoints(int prevRegion, int currentRegion, double prevKey, double prevValue,
                                                     double key, double value, double keyMin, double valueMax,
                                                     double keyMax, double valueMin) const
 {
     QVector<QPointF> result;
     switch (prevRegion)
     {
         case 1:
         {
             switch (currentRegion)
             {
                 case 2:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 4:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 3:
                 {
                     result << coordsToPixels(keyMin, valueMax) << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 7:
                 {
                     result << coordsToPixels(keyMin, valueMax) << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 6:
                 {
                     result << coordsToPixels(keyMin, valueMax) << coordsToPixels(keyMin, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 8:
                 {
                     result << coordsToPixels(keyMin, valueMax) << coordsToPixels(keyMax, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 9: // in this case we need another distinction of cases: segment may pass below or above rect, requiring either bottom right or top left corner points
                 {
                     if ((value - prevValue) / (key - prevKey) * (keyMin - key) + value <
                         valueMin) // segment passes below R
                     {
                         result << coordsToPixels(keyMin, valueMax) << coordsToPixels(keyMin, valueMin);
                         result.append(result.last());
                         result << coordsToPixels(keyMax, valueMin);
                     }
                     else
                     {
                         result << coordsToPixels(keyMin, valueMax) << coordsToPixels(keyMax, valueMax);
                         result.append(result.last());
                         result << coordsToPixels(keyMax, valueMin);
                     }
                     break;
                 }
             }
             break;
         }
         case 2:
         {
             switch (currentRegion)
             {
                 case 1:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 3:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 4:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 6:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 7:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     result.append(result.last());
                     result << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 9:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     result.append(result.last());
                     result << coordsToPixels(keyMax, valueMin);
                     break;
                 }
             }
             break;
         }
         case 3:
         {
             switch (currentRegion)
             {
                 case 2:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 6:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 1:
                 {
                     result << coordsToPixels(keyMin, valueMin) << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 9:
                 {
                     result << coordsToPixels(keyMin, valueMin) << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 4:
                 {
                     result << coordsToPixels(keyMin, valueMin) << coordsToPixels(keyMin, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 8:
                 {
                     result << coordsToPixels(keyMin, valueMin) << coordsToPixels(keyMax, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 7: // in this case we need another distinction of cases: segment may pass below or above rect, requiring either bottom right or top left corner points
                 {
                     if ((value - prevValue) / (key - prevKey) * (keyMax - key) + value <
                         valueMin) // segment passes below R
                     {
                         result << coordsToPixels(keyMin, valueMin) << coordsToPixels(keyMax, valueMin);
                         result.append(result.last());
                         result << coordsToPixels(keyMax, valueMax);
                     }
                     else
                     {
                         result << coordsToPixels(keyMin, valueMin) << coordsToPixels(keyMin, valueMax);
                         result.append(result.last());
                         result << coordsToPixels(keyMax, valueMax);
                     }
                     break;
                 }
             }
             break;
         }
         case 4:
         {
             switch (currentRegion)
             {
                 case 1:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 7:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 2:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 8:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 3:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     result.append(result.last());
                     result << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 9:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     result.append(result.last());
                     result << coordsToPixels(keyMax, valueMin);
                     break;
                 }
             }
             break;
         }
         case 5:
         {
             switch (currentRegion)
             {
                 case 1:
                 {
                     result << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 7:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 9:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 3:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     break;
                 }
             }
             break;
         }
         case 6:
         {
             switch (currentRegion)
             {
                 case 3:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 9:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 2:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 8:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 1:
                 {
                     result << coordsToPixels(keyMin, valueMin);
                     result.append(result.last());
                     result << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 7:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     result.append(result.last());
                     result << coordsToPixels(keyMax, valueMax);
                     break;
                 }
             }
             break;
         }
         case 7:
         {
             switch (currentRegion)
             {
                 case 4:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 8:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 1:
                 {
                     result << coordsToPixels(keyMax, valueMax) << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 9:
                 {
                     result << coordsToPixels(keyMax, valueMax) << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 2:
                 {
                     result << coordsToPixels(keyMax, valueMax) << coordsToPixels(keyMin, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 6:
                 {
                     result << coordsToPixels(keyMax, valueMax) << coordsToPixels(keyMax, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 3: // in this case we need another distinction of cases: segment may pass below or above rect, requiring either bottom right or top left corner points
                 {
                     if ((value - prevValue) / (key - prevKey) * (keyMax - key) + value <
                         valueMin) // segment passes below R
                     {
                         result << coordsToPixels(keyMax, valueMax) << coordsToPixels(keyMax, valueMin);
                         result.append(result.last());
                         result << coordsToPixels(keyMin, valueMin);
                     }
                     else
                     {
                         result << coordsToPixels(keyMax, valueMax) << coordsToPixels(keyMin, valueMax);
                         result.append(result.last());
                         result << coordsToPixels(keyMin, valueMin);
                     }
                     break;
                 }
             }
             break;
         }
         case 8:
         {
             switch (currentRegion)
             {
                 case 7:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 9:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 4:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 6:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 1:
                 {
                     result << coordsToPixels(keyMax, valueMax);
                     result.append(result.last());
                     result << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 3:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     result.append(result.last());
                     result << coordsToPixels(keyMin, valueMin);
                     break;
                 }
             }
             break;
         }
         case 9:
         {
             switch (currentRegion)
             {
                 case 6:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 8:
                 {
                     result << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 3:
                 {
                     result << coordsToPixels(keyMax, valueMin) << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 7:
                 {
                     result << coordsToPixels(keyMax, valueMin) << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 2:
                 {
                     result << coordsToPixels(keyMax, valueMin) << coordsToPixels(keyMin, valueMin);
                     result.append(result.last());
                     break;
                 }
                 case 4:
                 {
                     result << coordsToPixels(keyMax, valueMin) << coordsToPixels(keyMax, valueMax);
                     result.append(result.last());
                     break;
                 }
                 case 1: // in this case we need another distinction of cases: segment may pass below or above rect, requiring either bottom right or top left corner points
                 {
                     if ((value - prevValue) / (key - prevKey) * (keyMin - key) + value <
                         valueMin) // segment passes below R
                     {
                         result << coordsToPixels(keyMax, valueMin) << coordsToPixels(keyMin, valueMin);
                         result.append(result.last());
                         result << coordsToPixels(keyMin, valueMax);
                     }
                     else
                     {
                         result << coordsToPixels(keyMax, valueMin) << coordsToPixels(keyMax, valueMax);
                         result.append(result.last());
                         result << coordsToPixels(keyMin, valueMax);
                     }
                     break;
                 }
             }
             break;
         }
     }
     return result;
 }
 
 /*! \internal
 
   This function is part of the curve optimization algorithm of \ref getCurveLines.
 
   This method returns whether a segment going from \a prevRegion to \a currentRegion (see \ref
   getRegion) may traverse the visible region 5. This function assumes that neither \a prevRegion
   nor \a currentRegion is 5 itself.
 
   If this method returns false, the segment for sure doesn't pass region 5. If it returns true, the
   segment may or may not pass region 5 and a more fine-grained calculation must be used (\ref
   getTraverse).
 */
 bool QCPCurve::mayTraverse(int prevRegion, int currentRegion) const
 {
     switch (prevRegion)
     {
         case 1:
         {
             switch (currentRegion)
             {
                 case 4:
                 case 7:
                 case 2:
                 case 3:
                     return false;
                 default:
                     return true;
             }
         }
         case 2:
         {
             switch (currentRegion)
             {
                 case 1:
                 case 3:
                     return false;
                 default:
                     return true;
             }
         }
         case 3:
         {
             switch (currentRegion)
             {
                 case 1:
                 case 2:
                 case 6:
                 case 9:
                     return false;
                 default:
                     return true;
             }
         }
         case 4:
         {
             switch (currentRegion)
             {
                 case 1:
                 case 7:
                     return false;
                 default:
                     return true;
             }
         }
         case 5:
             return false; // should never occur
         case 6:
         {
             switch (currentRegion)
             {
                 case 3:
                 case 9:
                     return false;
                 default:
                     return true;
             }
         }
         case 7:
         {
             switch (currentRegion)
             {
                 case 1:
                 case 4:
                 case 8:
                 case 9:
                     return false;
                 default:
                     return true;
             }
         }
         case 8:
         {
             switch (currentRegion)
             {
                 case 7:
                 case 9:
                     return false;
                 default:
                     return true;
             }
         }
         case 9:
         {
             switch (currentRegion)
             {
                 case 3:
                 case 6:
                 case 8:
                 case 7:
                     return false;
                 default:
                     return true;
             }
         }
         default:
             return true;
     }
 }
 
 /*! \internal
 
   This function is part of the curve optimization algorithm of \ref getCurveLines.
 
   This method assumes that the \ref mayTraverse test has returned true, so there is a chance the
   segment defined by (\a prevKey, \a prevValue) and (\a key, \a value) goes through the visible
   region 5.
 
   The return value of this method indicates whether the segment actually traverses region 5 or not.
 
   If the segment traverses 5, the output parameters \a crossA and \a crossB indicate the entry and
   exit points of region 5. They will become the optimized points for that segment.
 */
 bool QCPCurve::getTraverse(double prevKey, double prevValue, double key, double value, double keyMin, double valueMax,
                            double keyMax, double valueMin, QPointF &crossA, QPointF &crossB) const
 {
     QList<QPointF> intersections;    // x of QPointF corresponds to key and y to value
     if (qFuzzyIsNull(key - prevKey)) // line is parallel to value axis
     {
         // due to region filter in mayTraverseR(), if line is parallel to value or key axis, R is traversed here
         intersections.append(QPointF(key, valueMin)); // direction will be taken care of at end of method
         intersections.append(QPointF(key, valueMax));
     }
     else if (qFuzzyIsNull(value - prevValue)) // line is parallel to key axis
     {
         // due to region filter in mayTraverseR(), if line is parallel to value or key axis, R is traversed here
         intersections.append(QPointF(keyMin, value)); // direction will be taken care of at end of method
         intersections.append(QPointF(keyMax, value));
     }
     else // line is skewed
     {
         double gamma;
         double keyPerValue = (key - prevKey) / (value - prevValue);
         // check top of rect:
         gamma = prevKey + (valueMax - prevValue) * keyPerValue;
         if (gamma >= keyMin && gamma <= keyMax)
             intersections.append(QPointF(gamma, valueMax));
         // check bottom of rect:
         gamma = prevKey + (valueMin - prevValue) * keyPerValue;
         if (gamma >= keyMin && gamma <= keyMax)
             intersections.append(QPointF(gamma, valueMin));
         double valuePerKey = 1.0 / keyPerValue;
         // check left of rect:
         gamma = prevValue + (keyMin - prevKey) * valuePerKey;
         if (gamma >= valueMin && gamma <= valueMax)
             intersections.append(QPointF(keyMin, gamma));
         // check right of rect:
         gamma = prevValue + (keyMax - prevKey) * valuePerKey;
         if (gamma >= valueMin && gamma <= valueMax)
             intersections.append(QPointF(keyMax, gamma));
     }
 
     // handle cases where found points isn't exactly 2:
     if (intersections.size() > 2)
     {
         // line probably goes through corner of rect, and we got duplicate points there. single out the point pair with greatest distance in between:
         double distSqrMax = 0;
         QPointF pv1, pv2;
         for (int i = 0; i < intersections.size() - 1; ++i)
         {
             for (int k = i + 1; k < intersections.size(); ++k)
             {
                 QPointF distPoint = intersections.at(i) - intersections.at(k);
                 double distSqr    = distPoint.x() * distPoint.x() + distPoint.y() + distPoint.y();
                 if (distSqr > distSqrMax)
                 {
                     pv1        = intersections.at(i);
                     pv2        = intersections.at(k);
                     distSqrMax = distSqr;
                 }
             }
         }
         intersections = QList<QPointF>() << pv1 << pv2;
     }
     else if (intersections.size() != 2)
     {
         // one or even zero points found (shouldn't happen unless line perfectly tangent to corner), no need to draw segment
         return false;
     }
 
     // possibly re-sort points so optimized point segment has same direction as original segment:
     if ((key - prevKey) * (intersections.at(1).x() - intersections.at(0).x()) +
             (value - prevValue) * (intersections.at(1).y() - intersections.at(0).y()) <
         0) // scalar product of both segments < 0 -> opposite direction
         intersections.move(0, 1);
     crossA = coordsToPixels(intersections.at(0).x(), intersections.at(0).y());
     crossB = coordsToPixels(intersections.at(1).x(), intersections.at(1).y());
     return true;
 }
 
 /*! \internal
 
   This function is part of the curve optimization algorithm of \ref getCurveLines.
 
   This method assumes that the \ref getTraverse test has returned true, so the segment definitely
   traverses the visible region 5 when going from \a prevRegion to \a currentRegion.
 
   In certain situations it is not sufficient to merely generate the entry and exit points of the
   segment into/out of region 5, as \ref getTraverse provides. It may happen that a single segment, in
   addition to traversing region 5, skips another region outside of region 5, which makes it
   necessary to add an optimized corner point there (very similar to the job \ref
   getOptimizedCornerPoints does for segments that are completely in outside regions and don't
   traverse 5).
 
   As an example, consider a segment going from region 1 to region 6, traversing the lower left
   corner of region 5. In this configuration, the segment additionally crosses the border between
   region 1 and 2 before entering region 5. This makes it necessary to add an additional point in
   the top left corner, before adding the optimized traverse points. So in this case, the output
   parameter \a beforeTraverse will contain the top left corner point, and \a afterTraverse will be
   empty.
 
   In some cases, such as when going from region 1 to 9, it may even be necessary to add additional
   corner points before and after the traverse. Then both \a beforeTraverse and \a afterTraverse
   return the respective corner points.
 */
 void QCPCurve::getTraverseCornerPoints(int prevRegion, int currentRegion, double keyMin, double valueMax, double keyMax,
                                        double valueMin, QVector<QPointF> &beforeTraverse,
                                        QVector<QPointF> &afterTraverse) const
 {
     switch (prevRegion)
     {
         case 1:
         {
             switch (currentRegion)
             {
                 case 6:
                 {
                     beforeTraverse << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 9:
                 {
                     beforeTraverse << coordsToPixels(keyMin, valueMax);
                     afterTraverse << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 8:
                 {
                     beforeTraverse << coordsToPixels(keyMin, valueMax);
                     break;
                 }
             }
             break;
         }
         case 2:
         {
             switch (currentRegion)
             {
                 case 7:
                 {
                     afterTraverse << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 9:
                 {
                     afterTraverse << coordsToPixels(keyMax, valueMin);
                     break;
                 }
             }
             break;
         }
         case 3:
         {
             switch (currentRegion)
             {
                 case 4:
                 {
                     beforeTraverse << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 7:
                 {
                     beforeTraverse << coordsToPixels(keyMin, valueMin);
                     afterTraverse << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 8:
                 {
                     beforeTraverse << coordsToPixels(keyMin, valueMin);
                     break;
                 }
             }
             break;
         }
         case 4:
         {
             switch (currentRegion)
             {
                 case 3:
                 {
                     afterTraverse << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 9:
                 {
                     afterTraverse << coordsToPixels(keyMax, valueMin);
                     break;
                 }
             }
             break;
         }
         case 5:
         {
             break; // shouldn't happen because this method only handles full traverses
         }
         case 6:
         {
             switch (currentRegion)
             {
                 case 1:
                 {
                     afterTraverse << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 7:
                 {
                     afterTraverse << coordsToPixels(keyMax, valueMax);
                     break;
                 }
             }
             break;
         }
         case 7:
         {
             switch (currentRegion)
             {
                 case 2:
                 {
                     beforeTraverse << coordsToPixels(keyMax, valueMax);
                     break;
                 }
                 case 3:
                 {
                     beforeTraverse << coordsToPixels(keyMax, valueMax);
                     afterTraverse << coordsToPixels(keyMin, valueMin);
                     break;
                 }
                 case 6:
                 {
                     beforeTraverse << coordsToPixels(keyMax, valueMax);
                     break;
                 }
             }
             break;
         }
         case 8:
         {
             switch (currentRegion)
             {
                 case 1:
                 {
                     afterTraverse << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 3:
                 {
                     afterTraverse << coordsToPixels(keyMin, valueMin);
                     break;
                 }
             }
             break;
         }
         case 9:
         {
             switch (currentRegion)
             {
                 case 2:
                 {
                     beforeTraverse << coordsToPixels(keyMax, valueMin);
                     break;
                 }
                 case 1:
                 {
                     beforeTraverse << coordsToPixels(keyMax, valueMin);
                     afterTraverse << coordsToPixels(keyMin, valueMax);
                     break;
                 }
                 case 4:
                 {
                     beforeTraverse << coordsToPixels(keyMax, valueMin);
                     break;
                 }
             }
             break;
         }
     }
 }
 
 /*! \internal
 
   Calculates the (minimum) distance (in pixels) the curve's representation has from the given \a
   pixelPoint in pixels. This is used to determine whether the curve was clicked or not, e.g. in
   \ref selectTest. The closest data point to \a pixelPoint is returned in \a closestData. Note that
   if the curve has a line representation, the returned distance may be smaller than the distance to
   the \a closestData point, since the distance to the curve line is also taken into account.
 
   If either the curve has no data or if the line style is \ref lsNone and the scatter style's shape
   is \ref QCPScatterStyle::ssNone (i.e. there is no visual representation of the curve), returns
   -1.0.
 */
 double QCPCurve::pointDistance(const QPointF &pixelPoint, QCPCurveDataContainer::const_iterator &closestData) const
 {
     closestData = mDataContainer->constEnd();
     if (mDataContainer->isEmpty())
         return -1.0;
     if (mLineStyle == lsNone && mScatterStyle.isNone())
         return -1.0;
 
     if (mDataContainer->size() == 1)
     {
         QPointF dataPoint = coordsToPixels(mDataContainer->constBegin()->key, mDataContainer->constBegin()->value);
         closestData       = mDataContainer->constBegin();
         return QCPVector2D(dataPoint - pixelPoint).length();
     }
 
     // calculate minimum distances to curve data points and find closestData iterator:
     double minDistSqr = std::numeric_limits<double>::max();
     // iterate over found data points and then choose the one with the shortest distance to pos:
     QCPCurveDataContainer::const_iterator begin = mDataContainer->constBegin();
     QCPCurveDataContainer::const_iterator end   = mDataContainer->constEnd();
     for (QCPCurveDataContainer::const_iterator it = begin; it != end; ++it)
     {
         const double currentDistSqr = QCPVector2D(coordsToPixels(it->key, it->value) - pixelPoint).lengthSquared();
         if (currentDistSqr < minDistSqr)
         {
             minDistSqr  = currentDistSqr;
             closestData = it;
         }
     }
 
     // calculate distance to line if there is one (if so, will probably be smaller than distance to closest data point):
     if (mLineStyle != lsNone)
     {
         QVector<QPointF> lines;
         getCurveLines(
             &lines, QCPDataRange(0, dataCount()),
             mParentPlot->selectionTolerance() *
                 1.2); // optimized lines outside axis rect shouldn't respond to clicks at the edge, so use 1.2*tolerance as pen width
         for (int i = 0; i < lines.size() - 1; ++i)
         {
             double currentDistSqr = QCPVector2D(pixelPoint).distanceSquaredToLine(lines.at(i), lines.at(i + 1));
             if (currentDistSqr < minDistSqr)
                 minDistSqr = currentDistSqr;
         }
     }
 
     return qSqrt(minDistSqr);
 }
 /* end of 'src/plottables/plottable-curve.cpp' */
 
 /* including file 'src/plottables/plottable-bars.cpp', size 43512            */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPBarsGroup
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPBarsGroup
   \brief Groups multiple QCPBars together so they appear side by side
 
   \image html QCPBarsGroup.png
 
   When showing multiple QCPBars in one plot which have bars at identical keys, it may be desirable
   to have them appearing next to each other at each key. This is what adding the respective QCPBars
   plottables to a QCPBarsGroup achieves. (An alternative approach is to stack them on top of each
   other, see \ref QCPBars::moveAbove.)
 
   \section qcpbarsgroup-usage Usage
 
   To add a QCPBars plottable to the group, create a new group and then add the respective bars
   intances:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpbarsgroup-creation
   Alternatively to appending to the group like shown above, you can also set the group on the
   QCPBars plottable via \ref QCPBars::setBarsGroup.
 
   The spacing between the bars can be configured via \ref setSpacingType and \ref setSpacing. The
   bars in this group appear in the plot in the order they were appended. To insert a bars plottable
   at a certain index position, or to reposition a bars plottable which is already in the group, use
   \ref insert.
 
   To remove specific bars from the group, use either \ref remove or call \ref
   QCPBars::setBarsGroup "QCPBars::setBarsGroup(0)" on the respective bars plottable.
 
   To clear the entire group, call \ref clear, or simply delete the group.
 
   \section qcpbarsgroup-example Example
 
   The image above is generated with the following code:
   \snippet documentation/doc-image-generator/mainwindow.cpp qcpbarsgroup-example
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QList<QCPBars*> QCPBarsGroup::bars() const
 
   Returns all bars currently in this group.
 
   \see bars(int index)
 */
 
 /*! \fn int QCPBarsGroup::size() const
 
   Returns the number of QCPBars plottables that are part of this group.
 
 */
 
 /*! \fn bool QCPBarsGroup::isEmpty() const
 
   Returns whether this bars group is empty.
 
   \see size
 */
 
 /*! \fn bool QCPBarsGroup::contains(QCPBars *bars)
 
   Returns whether the specified \a bars plottable is part of this group.
 
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs a new bars group for the specified QCustomPlot instance.
 */
 QCPBarsGroup::QCPBarsGroup(QCustomPlot *parentPlot)
     : QObject(parentPlot), mParentPlot(parentPlot), mSpacingType(stAbsolute), mSpacing(4)
 {
 }
 
 QCPBarsGroup::~QCPBarsGroup()
 {
     clear();
 }
 
 /*!
   Sets how the spacing between adjacent bars is interpreted. See \ref SpacingType.
 
   The actual spacing can then be specified with \ref setSpacing.
 
   \see setSpacing
 */
 void QCPBarsGroup::setSpacingType(SpacingType spacingType)
 {
     mSpacingType = spacingType;
 }
 
 /*!
   Sets the spacing between adjacent bars. What the number passed as \a spacing actually means, is
   defined by the current \ref SpacingType, which can be set with \ref setSpacingType.
 
   \see setSpacingType
 */
 void QCPBarsGroup::setSpacing(double spacing)
 {
     mSpacing = spacing;
 }
 
 /*!
   Returns the QCPBars instance with the specified \a index in this group. If no such QCPBars
   exists, returns 0.
 
   \see bars(), size
 */
 QCPBars *QCPBarsGroup::bars(int index) const
 {
     if (index >= 0 && index < mBars.size())
     {
         return mBars.at(index);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << index;
-        return 0;
+        return nullptr;
     }
 }
 
 /*!
   Removes all QCPBars plottables from this group.
 
   \see isEmpty
 */
 void QCPBarsGroup::clear()
 {
     foreach (QCPBars *bars, mBars) // since foreach takes a copy, removing bars in the loop is okay
-        bars->setBarsGroup(0);     // removes itself via removeBars
+        bars->setBarsGroup(nullptr);     // removes itself via removeBars
 }
 
 /*!
   Adds the specified \a bars plottable to this group. Alternatively, you can also use \ref
   QCPBars::setBarsGroup on the \a bars instance.
 
   \see insert, remove
 */
 void QCPBarsGroup::append(QCPBars *bars)
 {
     if (!bars)
     {
         qDebug() << Q_FUNC_INFO << "bars is 0";
         return;
     }
 
     if (!mBars.contains(bars))
         bars->setBarsGroup(this);
     else
         qDebug() << Q_FUNC_INFO << "bars plottable is already in this bars group:" << reinterpret_cast<quintptr>(bars);
 }
 
 /*!
   Inserts the specified \a bars plottable into this group at the specified index position \a i.
   This gives you full control over the ordering of the bars.
 
   \a bars may already be part of this group. In that case, \a bars is just moved to the new index
   position.
 
   \see append, remove
 */
 void QCPBarsGroup::insert(int i, QCPBars *bars)
 {
     if (!bars)
     {
         qDebug() << Q_FUNC_INFO << "bars is 0";
         return;
     }
 
     // first append to bars list normally:
     if (!mBars.contains(bars))
         bars->setBarsGroup(this);
     // then move to according position:
     mBars.move(mBars.indexOf(bars), qBound(0, i, mBars.size() - 1));
 }
 
 /*!
   Removes the specified \a bars plottable from this group.
 
   \see contains, clear
 */
 void QCPBarsGroup::remove(QCPBars *bars)
 {
     if (!bars)
     {
         qDebug() << Q_FUNC_INFO << "bars is 0";
         return;
     }
 
     if (mBars.contains(bars))
-        bars->setBarsGroup(0);
+        bars->setBarsGroup(nullptr);
     else
         qDebug() << Q_FUNC_INFO << "bars plottable is not in this bars group:" << reinterpret_cast<quintptr>(bars);
 }
 
 /*! \internal
 
   Adds the specified \a bars to the internal mBars list of bars. This method does not change the
   barsGroup property on \a bars.
 
   \see unregisterBars
 */
 void QCPBarsGroup::registerBars(QCPBars *bars)
 {
     if (!mBars.contains(bars))
         mBars.append(bars);
 }
 
 /*! \internal
 
   Removes the specified \a bars from the internal mBars list of bars. This method does not change
   the barsGroup property on \a bars.
 
   \see registerBars
 */
 void QCPBarsGroup::unregisterBars(QCPBars *bars)
 {
     mBars.removeOne(bars);
 }
 
 /*! \internal
 
   Returns the pixel offset in the key dimension the specified \a bars plottable should have at the
   given key coordinate \a keyCoord. The offset is relative to the pixel position of the key
   coordinate \a keyCoord.
 */
 double QCPBarsGroup::keyPixelOffset(const QCPBars *bars, double keyCoord)
 {
     // find list of all base bars in case some mBars are stacked:
     QList<const QCPBars *> baseBars;
     foreach (const QCPBars *b, mBars)
     {
         while (b->barBelow())
             b = b->barBelow();
         if (!baseBars.contains(b))
             baseBars.append(b);
     }
     // find base bar this "bars" is stacked on:
     const QCPBars *thisBase = bars;
     while (thisBase->barBelow())
         thisBase = thisBase->barBelow();
 
     // determine key pixel offset of this base bars considering all other base bars in this barsgroup:
     double result = 0;
     int index     = baseBars.indexOf(thisBase);
     if (index >= 0)
     {
         if (baseBars.size() % 2 == 1 && index == (baseBars.size() - 1) / 2) // is center bar (int division on purpose)
         {
             return result;
         }
         else
         {
             double lowerPixelWidth, upperPixelWidth;
             int startIndex;
             int dir =
                 (index <= (baseBars.size() - 1) / 2) ? -1 : 1; // if bar is to lower keys of center, dir is negative
             if (baseBars.size() % 2 == 0)                      // even number of bars
             {
                 startIndex = baseBars.size() / 2 + (dir < 0 ? -1 : 0);
                 result += getPixelSpacing(baseBars.at(startIndex), keyCoord) * 0.5; // half of middle spacing
             }
             else // uneven number of bars
             {
                 startIndex = (baseBars.size() - 1) / 2 + dir;
                 baseBars.at((baseBars.size() - 1) / 2)->getPixelWidth(keyCoord, lowerPixelWidth, upperPixelWidth);
                 result += qAbs(upperPixelWidth - lowerPixelWidth) * 0.5;                     // half of center bar
                 result += getPixelSpacing(baseBars.at((baseBars.size() - 1) / 2), keyCoord); // center bar spacing
             }
             for (int i = startIndex; i != index;
                  i += dir) // add widths and spacings of bars in between center and our bars
             {
                 baseBars.at(i)->getPixelWidth(keyCoord, lowerPixelWidth, upperPixelWidth);
                 result += qAbs(upperPixelWidth - lowerPixelWidth);
                 result += getPixelSpacing(baseBars.at(i), keyCoord);
             }
             // finally half of our bars width:
             baseBars.at(index)->getPixelWidth(keyCoord, lowerPixelWidth, upperPixelWidth);
             result += qAbs(upperPixelWidth - lowerPixelWidth) * 0.5;
             // correct sign of result depending on orientation and direction of key axis:
             result *= dir * thisBase->keyAxis()->pixelOrientation();
         }
     }
     return result;
 }
 
 /*! \internal
 
   Returns the spacing in pixels which is between this \a bars and the following one, both at the
   key coordinate \a keyCoord.
 
   \note Typically the returned value doesn't depend on \a bars or \a keyCoord. \a bars is only
   needed to get access to the key axis transformation and axis rect for the modes \ref
   stAxisRectRatio and \ref stPlotCoords. The \a keyCoord is only relevant for spacings given in
   \ref stPlotCoords on a logarithmic axis.
 */
 double QCPBarsGroup::getPixelSpacing(const QCPBars *bars, double keyCoord)
 {
     switch (mSpacingType)
     {
         case stAbsolute:
         {
             return mSpacing;
         }
         case stAxisRectRatio:
         {
             if (bars->keyAxis()->orientation() == Qt::Horizontal)
                 return bars->keyAxis()->axisRect()->width() * mSpacing;
             else
                 return bars->keyAxis()->axisRect()->height() * mSpacing;
         }
         case stPlotCoords:
         {
             double keyPixel = bars->keyAxis()->coordToPixel(keyCoord);
             return qAbs(bars->keyAxis()->coordToPixel(keyCoord + mSpacing) - keyPixel);
         }
     }
     return 0;
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPBarsData
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPBarsData
   \brief Holds the data of one single data point (one bar) for QCPBars.
 
   The stored data is:
   \li \a key: coordinate on the key axis of this bar (this is the \a mainKey and the \a sortKey)
   \li \a value: height coordinate on the value axis of this bar (this is the \a mainValue)
 
   The container for storing multiple data points is \ref QCPBarsDataContainer. It is a typedef for
   \ref QCPDataContainer with \ref QCPBarsData as the DataType template parameter. See the
   documentation there for an explanation regarding the data type's generic methods.
 
   \see QCPBarsDataContainer
 */
 
 /* start documentation of inline functions */
 
 /*! \fn double QCPBarsData::sortKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static QCPBarsData QCPBarsData::fromSortKey(double sortKey)
 
   Returns a data point with the specified \a sortKey. All other members are set to zero.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static static bool QCPBarsData::sortKeyIsMainKey()
 
   Since the member \a key is both the data point key coordinate and the data ordering parameter,
   this method returns true.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPBarsData::mainKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPBarsData::mainValue() const
 
   Returns the \a value member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn QCPRange QCPBarsData::valueRange() const
 
   Returns a QCPRange with both lower and upper boundary set to \a value of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Constructs a bar data point with key and value set to zero.
 */
 QCPBarsData::QCPBarsData() : key(0), value(0)
 {
 }
 
 /*!
   Constructs a bar data point with the specified \a key and \a value.
 */
 QCPBarsData::QCPBarsData(double key, double value) : key(key), value(value)
 {
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPBars
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPBars
   \brief A plottable representing a bar chart in a plot.
 
   \image html QCPBars.png
 
   To plot data, assign it with the \ref setData or \ref addData functions.
 
   \section qcpbars-appearance Changing the appearance
 
   The appearance of the bars is determined by the pen and the brush (\ref setPen, \ref setBrush).
   The width of the individual bars can be controlled with \ref setWidthType and \ref setWidth.
 
   Bar charts are stackable. This means, two QCPBars plottables can be placed on top of each other
   (see \ref QCPBars::moveAbove). So when two bars are at the same key position, they will appear
   stacked.
 
   If you would like to group multiple QCPBars plottables together so they appear side by side as
   shown below, use QCPBarsGroup.
 
   \image html QCPBarsGroup.png
 
   \section qcpbars-usage Usage
 
   Like all data representing objects in QCustomPlot, the QCPBars is a plottable
   (QCPAbstractPlottable). So the plottable-interface of QCustomPlot applies
   (QCustomPlot::plottable, QCustomPlot::removePlottable, etc.)
 
   Usually, you first create an instance:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpbars-creation-1
   which registers it with the QCustomPlot instance of the passed axes. Note that this QCustomPlot instance takes
   ownership of the plottable, so do not delete it manually but use QCustomPlot::removePlottable() instead.
   The newly created plottable can be modified, e.g.:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpbars-creation-2
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QSharedPointer<QCPBarsDataContainer> QCPBars::data() const
 
   Returns a shared pointer to the internal data storage of type \ref QCPBarsDataContainer. You may
   use it to directly manipulate the data, which may be more convenient and faster than using the
   regular \ref setData or \ref addData methods.
 */
 
 /*! \fn QCPBars *QCPBars::barBelow() const
   Returns the bars plottable that is directly below this bars plottable.
   If there is no such plottable, returns 0.
 
   \see barAbove, moveBelow, moveAbove
 */
 
 /*! \fn QCPBars *QCPBars::barAbove() const
   Returns the bars plottable that is directly above this bars plottable.
   If there is no such plottable, returns 0.
 
   \see barBelow, moveBelow, moveAbove
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs a bar chart which uses \a keyAxis as its key axis ("x") and \a valueAxis as its value
   axis ("y"). \a keyAxis and \a valueAxis must reside in the same QCustomPlot instance and not have
   the same orientation. If either of these restrictions is violated, a corresponding message is
   printed to the debug output (qDebug), the construction is not aborted, though.
 
   The created QCPBars is automatically registered with the QCustomPlot instance inferred from \a
   keyAxis. This QCustomPlot instance takes ownership of the QCPBars, so do not delete it manually
   but use QCustomPlot::removePlottable() instead.
 */
 QCPBars::QCPBars(QCPAxis *keyAxis, QCPAxis *valueAxis)
-    : QCPAbstractPlottable1D<QCPBarsData>(keyAxis, valueAxis), mWidth(0.75), mWidthType(wtPlotCoords), mBarsGroup(0),
+    : QCPAbstractPlottable1D<QCPBarsData>(keyAxis, valueAxis), mWidth(0.75), mWidthType(wtPlotCoords), mBarsGroup(nullptr),
       mBaseValue(0), mStackingGap(0)
 {
     // modify inherited properties from abstract plottable:
     mPen.setColor(Qt::blue);
     mPen.setStyle(Qt::SolidLine);
     mBrush.setColor(QColor(40, 50, 255, 30));
     mBrush.setStyle(Qt::SolidPattern);
     mSelectionDecorator->setBrush(QBrush(QColor(160, 160, 255)));
 }
 
 QCPBars::~QCPBars()
 {
-    setBarsGroup(0);
+    setBarsGroup(nullptr);
     if (mBarBelow || mBarAbove)
         connectBars(mBarBelow.data(), mBarAbove.data()); // take this bar out of any stacking
 }
 
 /*! \overload
 
   Replaces the current data container with the provided \a data container.
 
   Since a QSharedPointer is used, multiple QCPBars may share the same data container safely.
   Modifying the data in the container will then affect all bars that share the container. Sharing
   can be achieved by simply exchanging the data containers wrapped in shared pointers:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpbars-datasharing-1
 
   If you do not wish to share containers, but create a copy from an existing container, rather use
   the \ref QCPDataContainer<DataType>::set method on the bar's data container directly:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpbars-datasharing-2
 
   \see addData
 */
 void QCPBars::setData(QSharedPointer<QCPBarsDataContainer> data)
 {
     mDataContainer = data;
 }
 
 /*! \overload
 
   Replaces the current data with the provided points in \a keys and \a values. The provided
   vectors should have equal length. Else, the number of added points will be the size of the
   smallest vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   \see addData
 */
 void QCPBars::setData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted)
 {
     mDataContainer->clear();
     addData(keys, values, alreadySorted);
 }
 
 /*!
   Sets the width of the bars.
 
   How the number passed as \a width is interpreted (e.g. screen pixels, plot coordinates,...),
   depends on the currently set width type, see \ref setWidthType and \ref WidthType.
 */
 void QCPBars::setWidth(double width)
 {
     mWidth = width;
 }
 
 /*!
   Sets how the width of the bars is defined. See the documentation of \ref WidthType for an
   explanation of the possible values for \a widthType.
 
   The default value is \ref wtPlotCoords.
 
   \see setWidth
 */
 void QCPBars::setWidthType(QCPBars::WidthType widthType)
 {
     mWidthType = widthType;
 }
 
 /*!
   Sets to which QCPBarsGroup this QCPBars instance belongs to. Alternatively, you can also use \ref
   QCPBarsGroup::append.
 
   To remove this QCPBars from any group, set \a barsGroup to 0.
 */
 void QCPBars::setBarsGroup(QCPBarsGroup *barsGroup)
 {
     // deregister at old group:
     if (mBarsGroup)
         mBarsGroup->unregisterBars(this);
     mBarsGroup = barsGroup;
     // register at new group:
     if (mBarsGroup)
         mBarsGroup->registerBars(this);
 }
 
 /*!
   Sets the base value of this bars plottable.
 
   The base value defines where on the value coordinate the bars start. How far the bars extend from
   the base value is given by their individual value data. For example, if the base value is set to
   1, a bar with data value 2 will have its lowest point at value coordinate 1 and highest point at
   3.
 
   For stacked bars, only the base value of the bottom-most QCPBars has meaning.
 
   The default base value is 0.
 */
 void QCPBars::setBaseValue(double baseValue)
 {
     mBaseValue = baseValue;
 }
 
 /*!
   If this bars plottable is stacked on top of another bars plottable (\ref moveAbove), this method
   allows specifying a distance in \a pixels, by which the drawn bar rectangles will be separated by
   the bars below it.
 */
 void QCPBars::setStackingGap(double pixels)
 {
     mStackingGap = pixels;
 }
 
 /*! \overload
 
   Adds the provided points in \a keys and \a values to the current data. The provided vectors
   should have equal length. Else, the number of added points will be the size of the smallest
   vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPBars::addData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted)
 {
     if (keys.size() != values.size())
         qDebug() << Q_FUNC_INFO << "keys and values have different sizes:" << keys.size() << values.size();
     const int n = qMin(keys.size(), values.size());
     QVector<QCPBarsData> tempData(n);
     QVector<QCPBarsData>::iterator it          = tempData.begin();
     const QVector<QCPBarsData>::iterator itEnd = tempData.end();
     int i                                      = 0;
     while (it != itEnd)
     {
         it->key   = keys[i];
         it->value = values[i];
         ++it;
         ++i;
     }
     mDataContainer->add(tempData, alreadySorted); // don't modify tempData beyond this to prevent copy on write
 }
 
 /*! \overload
   Adds the provided data point as \a key and \a value to the current data.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPBars::addData(double key, double value)
 {
     mDataContainer->add(QCPBarsData(key, value));
 }
 
 /*!
   Moves this bars plottable below \a bars. In other words, the bars of this plottable will appear
   below the bars of \a bars. The move target \a bars must use the same key and value axis as this
   plottable.
 
   Inserting into and removing from existing bar stacking is handled gracefully. If \a bars already
   has a bars object below itself, this bars object is inserted between the two. If this bars object
   is already between two other bars, the two other bars will be stacked on top of each other after
   the operation.
 
   To remove this bars plottable from any stacking, set \a bars to 0.
 
   \see moveBelow, barAbove, barBelow
 */
 void QCPBars::moveBelow(QCPBars *bars)
 {
     if (bars == this)
         return;
     if (bars && (bars->keyAxis() != mKeyAxis.data() || bars->valueAxis() != mValueAxis.data()))
     {
         qDebug() << Q_FUNC_INFO << "passed QCPBars* doesn't have same key and value axis as this QCPBars";
         return;
     }
     // remove from stacking:
     connectBars(mBarBelow.data(), mBarAbove.data()); // Note: also works if one (or both) of them is 0
     // if new bar given, insert this bar below it:
     if (bars)
     {
         if (bars->mBarBelow)
             connectBars(bars->mBarBelow.data(), this);
         connectBars(this, bars);
     }
 }
 
 /*!
   Moves this bars plottable above \a bars. In other words, the bars of this plottable will appear
   above the bars of \a bars. The move target \a bars must use the same key and value axis as this
   plottable.
 
   Inserting into and removing from existing bar stacking is handled gracefully. If \a bars already
   has a bars object above itself, this bars object is inserted between the two. If this bars object
   is already between two other bars, the two other bars will be stacked on top of each other after
   the operation.
 
   To remove this bars plottable from any stacking, set \a bars to 0.
 
   \see moveBelow, barBelow, barAbove
 */
 void QCPBars::moveAbove(QCPBars *bars)
 {
     if (bars == this)
         return;
     if (bars && (bars->keyAxis() != mKeyAxis.data() || bars->valueAxis() != mValueAxis.data()))
     {
         qDebug() << Q_FUNC_INFO << "passed QCPBars* doesn't have same key and value axis as this QCPBars";
         return;
     }
     // remove from stacking:
     connectBars(mBarBelow.data(), mBarAbove.data()); // Note: also works if one (or both) of them is 0
     // if new bar given, insert this bar above it:
     if (bars)
     {
         if (bars->mBarAbove)
             connectBars(this, bars->mBarAbove.data());
         connectBars(bars, this);
     }
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::selectTestRect
 */
 QCPDataSelection QCPBars::selectTestRect(const QRectF &rect, bool onlySelectable) const
 {
     QCPDataSelection result;
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return result;
     if (!mKeyAxis || !mValueAxis)
         return result;
 
     QCPBarsDataContainer::const_iterator visibleBegin, visibleEnd;
     getVisibleDataBounds(visibleBegin, visibleEnd);
 
     for (QCPBarsDataContainer::const_iterator it = visibleBegin; it != visibleEnd; ++it)
     {
         if (rect.intersects(getBarRect(it->key, it->value)))
             result.addDataRange(QCPDataRange(it - mDataContainer->constBegin(), it - mDataContainer->constBegin() + 1),
                                 false);
     }
     result.simplify();
     return result;
 }
 
 /* inherits documentation from base class */
 double QCPBars::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     if (mKeyAxis.data()->axisRect()->rect().contains(pos.toPoint()))
     {
         // get visible data range:
         QCPBarsDataContainer::const_iterator visibleBegin, visibleEnd;
         getVisibleDataBounds(visibleBegin, visibleEnd);
         for (QCPBarsDataContainer::const_iterator it = visibleBegin; it != visibleEnd; ++it)
         {
             if (getBarRect(it->key, it->value).contains(pos))
             {
                 if (details)
                 {
                     int pointIndex = it - mDataContainer->constBegin();
                     details->setValue(QCPDataSelection(QCPDataRange(pointIndex, pointIndex + 1)));
                 }
                 return mParentPlot->selectionTolerance() * 0.99;
             }
         }
     }
     return -1;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPBars::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const
 {
     /* Note: If this QCPBars uses absolute pixels as width (or is in a QCPBarsGroup with spacing in
     absolute pixels), using this method to adapt the key axis range to fit the bars into the
     currently visible axis range will not work perfectly. Because in the moment the axis range is
     changed to the new range, the fixed pixel widths/spacings will represent different coordinate
     spans than before, which in turn would require a different key range to perfectly fit, and so on.
     The only solution would be to iteratively approach the perfect fitting axis range, but the
     mismatch isn't large enough in most applications, to warrant this here. If a user does need a
     better fit, he should call the corresponding axis rescale multiple times in a row.
     */
     QCPRange range;
     range = mDataContainer->keyRange(foundRange, inSignDomain);
 
     // determine exact range of bars by including bar width and barsgroup offset:
     if (foundRange && mKeyAxis)
     {
         double lowerPixelWidth, upperPixelWidth, keyPixel;
         // lower range bound:
         getPixelWidth(range.lower, lowerPixelWidth, upperPixelWidth);
         keyPixel = mKeyAxis.data()->coordToPixel(range.lower) + lowerPixelWidth;
         if (mBarsGroup)
             keyPixel += mBarsGroup->keyPixelOffset(this, range.lower);
         const double lowerCorrected = mKeyAxis.data()->pixelToCoord(keyPixel);
         if (!qIsNaN(lowerCorrected) && qIsFinite(lowerCorrected) && range.lower > lowerCorrected)
             range.lower = lowerCorrected;
         // upper range bound:
         getPixelWidth(range.upper, lowerPixelWidth, upperPixelWidth);
         keyPixel = mKeyAxis.data()->coordToPixel(range.upper) + upperPixelWidth;
         if (mBarsGroup)
             keyPixel += mBarsGroup->keyPixelOffset(this, range.upper);
         const double upperCorrected = mKeyAxis.data()->pixelToCoord(keyPixel);
         if (!qIsNaN(upperCorrected) && qIsFinite(upperCorrected) && range.upper < upperCorrected)
             range.upper = upperCorrected;
     }
     return range;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPBars::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain, const QCPRange &inKeyRange) const
 {
     // Note: can't simply use mDataContainer->valueRange here because we need to
     // take into account bar base value and possible stacking of multiple bars
     QCPRange range;
     range.lower    = mBaseValue;
     range.upper    = mBaseValue;
     bool haveLower = true; // set to true, because baseValue should always be visible in bar charts
     bool haveUpper = true; // set to true, because baseValue should always be visible in bar charts
     QCPBarsDataContainer::const_iterator itBegin = mDataContainer->constBegin();
     QCPBarsDataContainer::const_iterator itEnd   = mDataContainer->constEnd();
     if (inKeyRange != QCPRange())
     {
         itBegin = mDataContainer->findBegin(inKeyRange.lower);
         itEnd   = mDataContainer->findEnd(inKeyRange.upper);
     }
     for (QCPBarsDataContainer::const_iterator it = itBegin; it != itEnd; ++it)
     {
         const double current = it->value + getStackedBaseValue(it->key, it->value >= 0);
         if (qIsNaN(current))
             continue;
         if (inSignDomain == QCP::sdBoth || (inSignDomain == QCP::sdNegative && current < 0) ||
             (inSignDomain == QCP::sdPositive && current > 0))
         {
             if (current < range.lower || !haveLower)
             {
                 range.lower = current;
                 haveLower   = true;
             }
             if (current > range.upper || !haveUpper)
             {
                 range.upper = current;
                 haveUpper   = true;
             }
         }
     }
 
     foundRange = true; // return true because bar charts always have the 0-line visible
     return range;
 }
 
 /* inherits documentation from base class */
 QPointF QCPBars::dataPixelPosition(int index) const
 {
     if (index >= 0 && index < mDataContainer->size())
     {
         QCPAxis *keyAxis   = mKeyAxis.data();
         QCPAxis *valueAxis = mValueAxis.data();
         if (!keyAxis || !valueAxis)
         {
             qDebug() << Q_FUNC_INFO << "invalid key or value axis";
             return QPointF();
         }
 
         const QCPDataContainer<QCPBarsData>::const_iterator it = mDataContainer->constBegin() + index;
         const double valuePixel = valueAxis->coordToPixel(getStackedBaseValue(it->key, it->value >= 0) + it->value);
         const double keyPixel =
             keyAxis->coordToPixel(it->key) + (mBarsGroup ? mBarsGroup->keyPixelOffset(this, it->key) : 0);
         if (keyAxis->orientation() == Qt::Horizontal)
             return QPointF(keyPixel, valuePixel);
         else
             return QPointF(valuePixel, keyPixel);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Index out of bounds" << index;
         return QPointF();
     }
 }
 
 /* inherits documentation from base class */
 void QCPBars::draw(QCPPainter *painter)
 {
     if (!mKeyAxis || !mValueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
     if (mDataContainer->isEmpty())
         return;
 
     QCPBarsDataContainer::const_iterator visibleBegin, visibleEnd;
     getVisibleDataBounds(visibleBegin, visibleEnd);
 
     // loop over and draw segments of unselected/selected data:
     QList<QCPDataRange> selectedSegments, unselectedSegments, allSegments;
     getDataSegments(selectedSegments, unselectedSegments);
     allSegments << unselectedSegments << selectedSegments;
     for (int i = 0; i < allSegments.size(); ++i)
     {
         bool isSelectedSegment                     = i >= unselectedSegments.size();
         QCPBarsDataContainer::const_iterator begin = visibleBegin;
         QCPBarsDataContainer::const_iterator end   = visibleEnd;
         mDataContainer->limitIteratorsToDataRange(begin, end, allSegments.at(i));
         if (begin == end)
             continue;
 
         for (QCPBarsDataContainer::const_iterator it = begin; it != end; ++it)
         {
 // check data validity if flag set:
 #ifdef QCUSTOMPLOT_CHECK_DATA
             if (QCP::isInvalidData(it->key, it->value))
                 qDebug() << Q_FUNC_INFO << "Data point at" << it->key << "of drawn range invalid."
                          << "Plottable name:" << name();
 #endif
             // draw bar:
             if (isSelectedSegment && mSelectionDecorator)
             {
                 mSelectionDecorator->applyBrush(painter);
                 mSelectionDecorator->applyPen(painter);
             }
             else
             {
                 painter->setBrush(mBrush);
                 painter->setPen(mPen);
             }
             applyDefaultAntialiasingHint(painter);
             painter->drawPolygon(getBarRect(it->key, it->value));
         }
     }
 
     // draw other selection decoration that isn't just line/scatter pens and brushes:
     if (mSelectionDecorator)
         mSelectionDecorator->drawDecoration(painter, selection());
 }
 
 /* inherits documentation from base class */
 void QCPBars::drawLegendIcon(QCPPainter *painter, const QRectF &rect) const
 {
     // draw filled rect:
     applyDefaultAntialiasingHint(painter);
     painter->setBrush(mBrush);
     painter->setPen(mPen);
     QRectF r = QRectF(0, 0, rect.width() * 0.67, rect.height() * 0.67);
     r.moveCenter(rect.center());
     painter->drawRect(r);
 }
 
 /*!  \internal
 
   called by \ref draw to determine which data (key) range is visible at the current key axis range
   setting, so only that needs to be processed. It also takes into account the bar width.
 
   \a begin returns an iterator to the lowest data point that needs to be taken into account when
   plotting. Note that in order to get a clean plot all the way to the edge of the axis rect, \a
   lower may still be just outside the visible range.
 
   \a end returns an iterator one higher than the highest visible data point. Same as before, \a end
   may also lie just outside of the visible range.
 
   if the plottable contains no data, both \a begin and \a end point to constEnd.
 */
 void QCPBars::getVisibleDataBounds(QCPBarsDataContainer::const_iterator &begin,
                                    QCPBarsDataContainer::const_iterator &end) const
 {
     if (!mKeyAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key axis";
         begin = mDataContainer->constEnd();
         end   = mDataContainer->constEnd();
         return;
     }
     if (mDataContainer->isEmpty())
     {
         begin = mDataContainer->constEnd();
         end   = mDataContainer->constEnd();
         return;
     }
 
     // get visible data range as QMap iterators
     begin                  = mDataContainer->findBegin(mKeyAxis.data()->range().lower);
     end                    = mDataContainer->findEnd(mKeyAxis.data()->range().upper);
     double lowerPixelBound = mKeyAxis.data()->coordToPixel(mKeyAxis.data()->range().lower);
     double upperPixelBound = mKeyAxis.data()->coordToPixel(mKeyAxis.data()->range().upper);
     bool isVisible         = false;
     // walk left from begin to find lower bar that actually is completely outside visible pixel range:
     QCPBarsDataContainer::const_iterator it = begin;
     while (it != mDataContainer->constBegin())
     {
         --it;
         const QRectF barRect = getBarRect(it->key, it->value);
         if (mKeyAxis.data()->orientation() == Qt::Horizontal)
             isVisible = ((!mKeyAxis.data()->rangeReversed() && barRect.right() >= lowerPixelBound) ||
                          (mKeyAxis.data()->rangeReversed() && barRect.left() <= lowerPixelBound));
         else // keyaxis is vertical
             isVisible = ((!mKeyAxis.data()->rangeReversed() && barRect.top() <= lowerPixelBound) ||
                          (mKeyAxis.data()->rangeReversed() && barRect.bottom() >= lowerPixelBound));
         if (isVisible)
             begin = it;
         else
             break;
     }
     // walk right from ubound to find upper bar that actually is completely outside visible pixel range:
     it = end;
     while (it != mDataContainer->constEnd())
     {
         const QRectF barRect = getBarRect(it->key, it->value);
         if (mKeyAxis.data()->orientation() == Qt::Horizontal)
             isVisible = ((!mKeyAxis.data()->rangeReversed() && barRect.left() <= upperPixelBound) ||
                          (mKeyAxis.data()->rangeReversed() && barRect.right() >= upperPixelBound));
         else // keyaxis is vertical
             isVisible = ((!mKeyAxis.data()->rangeReversed() && barRect.bottom() >= upperPixelBound) ||
                          (mKeyAxis.data()->rangeReversed() && barRect.top() <= upperPixelBound));
         if (isVisible)
             end = it + 1;
         else
             break;
         ++it;
     }
 }
 
 /*! \internal
 
   Returns the rect in pixel coordinates of a single bar with the specified \a key and \a value. The
   rect is shifted according to the bar stacking (see \ref moveAbove) and base value (see \ref
   setBaseValue), and to have non-overlapping border lines with the bars stacked below.
 */
 QRectF QCPBars::getBarRect(double key, double value) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return QRectF();
     }
 
     double lowerPixelWidth, upperPixelWidth;
     getPixelWidth(key, lowerPixelWidth, upperPixelWidth);
     double base       = getStackedBaseValue(key, value >= 0);
     double basePixel  = valueAxis->coordToPixel(base);
     double valuePixel = valueAxis->coordToPixel(base + value);
     double keyPixel   = keyAxis->coordToPixel(key);
     if (mBarsGroup)
         keyPixel += mBarsGroup->keyPixelOffset(this, key);
     double bottomOffset = (mBarBelow && mPen != Qt::NoPen ? 1 : 0) * (mPen.isCosmetic() ? 1 : mPen.widthF());
     bottomOffset += mBarBelow ? mStackingGap : 0;
     bottomOffset *= (value < 0 ? -1 : 1) * valueAxis->pixelOrientation();
     if (qAbs(valuePixel - basePixel) <= qAbs(bottomOffset))
         bottomOffset = valuePixel - basePixel;
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         return QRectF(QPointF(keyPixel + lowerPixelWidth, valuePixel),
                       QPointF(keyPixel + upperPixelWidth, basePixel + bottomOffset))
             .normalized();
     }
     else
     {
         return QRectF(QPointF(basePixel + bottomOffset, keyPixel + lowerPixelWidth),
                       QPointF(valuePixel, keyPixel + upperPixelWidth))
             .normalized();
     }
 }
 
 /*! \internal
 
   This function is used to determine the width of the bar at coordinate \a key, according to the
   specified width (\ref setWidth) and width type (\ref setWidthType).
 
   The output parameters \a lower and \a upper return the number of pixels the bar extends to lower
   and higher keys, relative to the \a key coordinate (so with a non-reversed horizontal axis, \a
   lower is negative and \a upper positive).
 */
 void QCPBars::getPixelWidth(double key, double &lower, double &upper) const
 {
     lower = 0;
     upper = 0;
     switch (mWidthType)
     {
         case wtAbsolute:
         {
             upper = mWidth * 0.5 * mKeyAxis.data()->pixelOrientation();
             lower = -upper;
             break;
         }
         case wtAxisRectRatio:
         {
             if (mKeyAxis && mKeyAxis.data()->axisRect())
             {
                 if (mKeyAxis.data()->orientation() == Qt::Horizontal)
                     upper = mKeyAxis.data()->axisRect()->width() * mWidth * 0.5 * mKeyAxis.data()->pixelOrientation();
                 else
                     upper = mKeyAxis.data()->axisRect()->height() * mWidth * 0.5 * mKeyAxis.data()->pixelOrientation();
                 lower = -upper;
             }
             else
                 qDebug() << Q_FUNC_INFO << "No key axis or axis rect defined";
             break;
         }
         case wtPlotCoords:
         {
             if (mKeyAxis)
             {
                 double keyPixel = mKeyAxis.data()->coordToPixel(key);
                 upper           = mKeyAxis.data()->coordToPixel(key + mWidth * 0.5) - keyPixel;
                 lower           = mKeyAxis.data()->coordToPixel(key - mWidth * 0.5) - keyPixel;
                 // no need to qSwap(lower, higher) when range reversed, because higher/lower are gained by
                 // coordinate transform which includes range direction
             }
             else
                 qDebug() << Q_FUNC_INFO << "No key axis defined";
             break;
         }
     }
 }
 
 /*! \internal
 
   This function is called to find at which value to start drawing the base of a bar at \a key, when
   it is stacked on top of another QCPBars (e.g. with \ref moveAbove).
 
   positive and negative bars are separated per stack (positive are stacked above baseValue upwards,
   negative are stacked below baseValue downwards). This can be indicated with \a positive. So if the
   bar for which we need the base value is negative, set \a positive to false.
 */
 double QCPBars::getStackedBaseValue(double key, bool positive) const
 {
     if (mBarBelow)
     {
         double max =
             0; // don't initialize with mBaseValue here because only base value of bottom-most bar has meaning in a bar stack
         // find bars of mBarBelow that are approximately at key and find largest one:
         double epsilon =
             qAbs(key) *
             (sizeof(key) == 4 ? 1e-6 : 1e-14); // should be safe even when changed to use float at some point
         if (key == 0)
             epsilon = (sizeof(key) == 4 ? 1e-6 : 1e-14);
         QCPBarsDataContainer::const_iterator it    = mBarBelow.data()->mDataContainer->findBegin(key - epsilon);
         QCPBarsDataContainer::const_iterator itEnd = mBarBelow.data()->mDataContainer->findEnd(key + epsilon);
         while (it != itEnd)
         {
             if (it->key > key - epsilon && it->key < key + epsilon)
             {
                 if ((positive && it->value > max) || (!positive && it->value < max))
                     max = it->value;
             }
             ++it;
         }
         // recurse down the bar-stack to find the total height:
         return max + mBarBelow.data()->getStackedBaseValue(key, positive);
     }
     else
         return mBaseValue;
 }
 
 /*! \internal
 
   Connects \a below and \a above to each other via their mBarAbove/mBarBelow properties. The bar(s)
   currently above lower and below upper will become disconnected to lower/upper.
 
   If lower is zero, upper will be disconnected at the bottom.
   If upper is zero, lower will be disconnected at the top.
 */
 void QCPBars::connectBars(QCPBars *lower, QCPBars *upper)
 {
     if (!lower && !upper)
         return;
 
     if (!lower) // disconnect upper at bottom
     {
         // disconnect old bar below upper:
         if (upper->mBarBelow && upper->mBarBelow.data()->mBarAbove.data() == upper)
-            upper->mBarBelow.data()->mBarAbove = 0;
-        upper->mBarBelow = 0;
+            upper->mBarBelow.data()->mBarAbove = nullptr;
+        upper->mBarBelow = nullptr;
     }
     else if (!upper) // disconnect lower at top
     {
         // disconnect old bar above lower:
         if (lower->mBarAbove && lower->mBarAbove.data()->mBarBelow.data() == lower)
-            lower->mBarAbove.data()->mBarBelow = 0;
-        lower->mBarAbove = 0;
+            lower->mBarAbove.data()->mBarBelow = nullptr;
+        lower->mBarAbove = nullptr;
     }
     else // connect lower and upper
     {
         // disconnect old bar above lower:
         if (lower->mBarAbove && lower->mBarAbove.data()->mBarBelow.data() == lower)
-            lower->mBarAbove.data()->mBarBelow = 0;
+            lower->mBarAbove.data()->mBarBelow = nullptr;
         // disconnect old bar below upper:
         if (upper->mBarBelow && upper->mBarBelow.data()->mBarAbove.data() == upper)
-            upper->mBarBelow.data()->mBarAbove = 0;
+            upper->mBarBelow.data()->mBarAbove = nullptr;
         lower->mBarAbove = upper;
         upper->mBarBelow = lower;
     }
 }
 /* end of 'src/plottables/plottable-bars.cpp' */
 
 /* including file 'src/plottables/plottable-statisticalbox.cpp', size 28622  */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPStatisticalBoxData
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPStatisticalBoxData
   \brief Holds the data of one single data point for QCPStatisticalBox.
 
   The stored data is:
 
   \li \a key: coordinate on the key axis of this data point (this is the \a mainKey and the \a sortKey)
 
   \li \a minimum: the position of the lower whisker, typically the minimum measurement of the
   sample that's not considered an outlier.
 
   \li \a lowerQuartile: the lower end of the box. The lower and the upper quartiles are the two
   statistical quartiles around the median of the sample, they should contain 50% of the sample
   data.
 
   \li \a median: the value of the median mark inside the quartile box. The median separates the
   sample data in half (50% of the sample data is below/above the median). (This is the \a mainValue)
 
   \li \a upperQuartile: the upper end of the box. The lower and the upper quartiles are the two
   statistical quartiles around the median of the sample, they should contain 50% of the sample
   data.
 
   \li \a maximum: the position of the upper whisker, typically the maximum measurement of the
   sample that's not considered an outlier.
 
   \li \a outliers: a QVector of outlier values that will be drawn as scatter points at the \a key
   coordinate of this data point (see \ref QCPStatisticalBox::setOutlierStyle)
 
   The container for storing multiple data points is \ref QCPStatisticalBoxDataContainer. It is a
   typedef for \ref QCPDataContainer with \ref QCPStatisticalBoxData as the DataType template
   parameter. See the documentation there for an explanation regarding the data type's generic
   methods.
 
   \see QCPStatisticalBoxDataContainer
 */
 
 /* start documentation of inline functions */
 
 /*! \fn double QCPStatisticalBoxData::sortKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static QCPStatisticalBoxData QCPStatisticalBoxData::fromSortKey(double sortKey)
 
   Returns a data point with the specified \a sortKey. All other members are set to zero.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static static bool QCPStatisticalBoxData::sortKeyIsMainKey()
 
   Since the member \a key is both the data point key coordinate and the data ordering parameter,
   this method returns true.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPStatisticalBoxData::mainKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPStatisticalBoxData::mainValue() const
 
   Returns the \a median member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn QCPRange QCPStatisticalBoxData::valueRange() const
 
   Returns a QCPRange spanning from the \a minimum to the \a maximum member of this statistical box
   data point, possibly further expanded by outliers.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Constructs a data point with key and all values set to zero.
 */
 QCPStatisticalBoxData::QCPStatisticalBoxData()
     : key(0), minimum(0), lowerQuartile(0), median(0), upperQuartile(0), maximum(0)
 {
 }
 
 /*!
   Constructs a data point with the specified \a key, \a minimum, \a lowerQuartile, \a median, \a
   upperQuartile, \a maximum and optionally a number of \a outliers.
 */
 QCPStatisticalBoxData::QCPStatisticalBoxData(double key, double minimum, double lowerQuartile, double median,
                                              double upperQuartile, double maximum, const QVector<double> &outliers)
     : key(key), minimum(minimum), lowerQuartile(lowerQuartile), median(median), upperQuartile(upperQuartile),
       maximum(maximum), outliers(outliers)
 {
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPStatisticalBox
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPStatisticalBox
   \brief A plottable representing a single statistical box in a plot.
 
   \image html QCPStatisticalBox.png
 
   To plot data, assign it with the \ref setData or \ref addData functions. Alternatively, you can
   also access and modify the data via the \ref data method, which returns a pointer to the internal
   \ref QCPStatisticalBoxDataContainer.
 
   Additionally each data point can itself have a list of outliers, drawn as scatter points at the
   key coordinate of the respective statistical box data point. They can either be set by using the
   respective \ref addData(double,double,double,double,double,double,const QVector<double>&)
   "addData" method or accessing the individual data points through \ref data, and setting the
   <tt>QVector<double> outliers</tt> of the data points directly.
 
   \section qcpstatisticalbox-appearance Changing the appearance
 
   The appearance of each data point box, ranging from the lower to the upper quartile, is
   controlled via \ref setPen and \ref setBrush. You may change the width of the boxes with \ref
   setWidth in plot coordinates.
 
   Each data point's visual representation also consists of two whiskers. Whiskers are the lines
   which reach from the upper quartile to the maximum, and from the lower quartile to the minimum.
   The appearance of the whiskers can be modified with: \ref setWhiskerPen, \ref setWhiskerBarPen,
   \ref setWhiskerWidth. The whisker width is the width of the bar perpendicular to the whisker at
   the top (for maximum) and bottom (for minimum). If the whisker pen is changed, make sure to set
   the \c capStyle to \c Qt::FlatCap. Otherwise the backbone line might exceed the whisker bars by a
   few pixels due to the pen cap being not perfectly flat.
 
   The median indicator line inside the box has its own pen, \ref setMedianPen.
 
   The outlier data points are drawn as normal scatter points. Their look can be controlled with
   \ref setOutlierStyle
 
   \section qcpstatisticalbox-usage Usage
 
   Like all data representing objects in QCustomPlot, the QCPStatisticalBox is a plottable
   (QCPAbstractPlottable). So the plottable-interface of QCustomPlot applies
   (QCustomPlot::plottable, QCustomPlot::removePlottable, etc.)
 
   Usually, you first create an instance:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpstatisticalbox-creation-1
   which registers it with the QCustomPlot instance of the passed axes. Note that this QCustomPlot instance takes
   ownership of the plottable, so do not delete it manually but use QCustomPlot::removePlottable() instead.
   The newly created plottable can be modified, e.g.:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpstatisticalbox-creation-2
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QSharedPointer<QCPStatisticalBoxDataContainer> QCPStatisticalBox::data() const
 
   Returns a shared pointer to the internal data storage of type \ref
   QCPStatisticalBoxDataContainer. You may use it to directly manipulate the data, which may be more
   convenient and faster than using the regular \ref setData or \ref addData methods.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Constructs a statistical box which uses \a keyAxis as its key axis ("x") and \a valueAxis as its
   value axis ("y"). \a keyAxis and \a valueAxis must reside in the same QCustomPlot instance and
   not have the same orientation. If either of these restrictions is violated, a corresponding
   message is printed to the debug output (qDebug), the construction is not aborted, though.
 
   The created QCPStatisticalBox is automatically registered with the QCustomPlot instance inferred
   from \a keyAxis. This QCustomPlot instance takes ownership of the QCPStatisticalBox, so do not
   delete it manually but use QCustomPlot::removePlottable() instead.
 */
 QCPStatisticalBox::QCPStatisticalBox(QCPAxis *keyAxis, QCPAxis *valueAxis)
     : QCPAbstractPlottable1D<QCPStatisticalBoxData>(keyAxis, valueAxis), mWidth(0.5), mWhiskerWidth(0.2),
       mWhiskerPen(Qt::black, 0, Qt::DashLine, Qt::FlatCap), mWhiskerBarPen(Qt::black), mWhiskerAntialiased(false),
       mMedianPen(Qt::black, 3, Qt::SolidLine, Qt::FlatCap), mOutlierStyle(QCPScatterStyle::ssCircle, Qt::blue, 6)
 {
     setPen(QPen(Qt::black));
     setBrush(Qt::NoBrush);
 }
 
 /*! \overload
 
   Replaces the current data container with the provided \a data container.
 
   Since a QSharedPointer is used, multiple QCPStatisticalBoxes may share the same data container
   safely. Modifying the data in the container will then affect all statistical boxes that share the
   container. Sharing can be achieved by simply exchanging the data containers wrapped in shared
   pointers:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpstatisticalbox-datasharing-1
 
   If you do not wish to share containers, but create a copy from an existing container, rather use
   the \ref QCPDataContainer<DataType>::set method on the statistical box data container directly:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpstatisticalbox-datasharing-2
 
   \see addData
 */
 void QCPStatisticalBox::setData(QSharedPointer<QCPStatisticalBoxDataContainer> data)
 {
     mDataContainer = data;
 }
 /*! \overload
 
   Replaces the current data with the provided points in \a keys, \a minimum, \a lowerQuartile, \a
   median, \a upperQuartile and \a maximum. The provided vectors should have equal length. Else, the
   number of added points will be the size of the smallest vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   \see addData
 */
 void QCPStatisticalBox::setData(const QVector<double> &keys, const QVector<double> &minimum,
                                 const QVector<double> &lowerQuartile, const QVector<double> &median,
                                 const QVector<double> &upperQuartile, const QVector<double> &maximum,
                                 bool alreadySorted)
 {
     mDataContainer->clear();
     addData(keys, minimum, lowerQuartile, median, upperQuartile, maximum, alreadySorted);
 }
 
 /*!
   Sets the width of the boxes in key coordinates.
 
   \see setWhiskerWidth
 */
 void QCPStatisticalBox::setWidth(double width)
 {
     mWidth = width;
 }
 
 /*!
   Sets the width of the whiskers in key coordinates.
 
   Whiskers are the lines which reach from the upper quartile to the maximum, and from the lower
   quartile to the minimum.
 
   \see setWidth
 */
 void QCPStatisticalBox::setWhiskerWidth(double width)
 {
     mWhiskerWidth = width;
 }
 
 /*!
   Sets the pen used for drawing the whisker backbone.
 
   Whiskers are the lines which reach from the upper quartile to the maximum, and from the lower
   quartile to the minimum.
 
   Make sure to set the \c capStyle of the passed \a pen to \c Qt::FlatCap. Otherwise the backbone
   line might exceed the whisker bars by a few pixels due to the pen cap being not perfectly flat.
 
   \see setWhiskerBarPen
 */
 void QCPStatisticalBox::setWhiskerPen(const QPen &pen)
 {
     mWhiskerPen = pen;
 }
 
 /*!
   Sets the pen used for drawing the whisker bars. Those are the lines parallel to the key axis at
   each end of the whisker backbone.
 
   Whiskers are the lines which reach from the upper quartile to the maximum, and from the lower
   quartile to the minimum.
 
   \see setWhiskerPen
 */
 void QCPStatisticalBox::setWhiskerBarPen(const QPen &pen)
 {
     mWhiskerBarPen = pen;
 }
 
 /*!
   Sets whether the statistical boxes whiskers are drawn with antialiasing or not.
 
   Note that antialiasing settings may be overridden by QCustomPlot::setAntialiasedElements and
   QCustomPlot::setNotAntialiasedElements.
 */
 void QCPStatisticalBox::setWhiskerAntialiased(bool enabled)
 {
     mWhiskerAntialiased = enabled;
 }
 
 /*!
   Sets the pen used for drawing the median indicator line inside the statistical boxes.
 */
 void QCPStatisticalBox::setMedianPen(const QPen &pen)
 {
     mMedianPen = pen;
 }
 
 /*!
   Sets the appearance of the outlier data points.
 
   Outliers can be specified with the method
   \ref addData(double key, double minimum, double lowerQuartile, double median, double upperQuartile, double maximum, const QVector<double> &outliers)
 */
 void QCPStatisticalBox::setOutlierStyle(const QCPScatterStyle &style)
 {
     mOutlierStyle = style;
 }
 
 /*! \overload
 
   Adds the provided points in \a keys, \a minimum, \a lowerQuartile, \a median, \a upperQuartile and
   \a maximum to the current data. The provided vectors should have equal length. Else, the number
   of added points will be the size of the smallest vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPStatisticalBox::addData(const QVector<double> &keys, const QVector<double> &minimum,
                                 const QVector<double> &lowerQuartile, const QVector<double> &median,
                                 const QVector<double> &upperQuartile, const QVector<double> &maximum,
                                 bool alreadySorted)
 {
     if (keys.size() != minimum.size() || minimum.size() != lowerQuartile.size() ||
         lowerQuartile.size() != median.size() || median.size() != upperQuartile.size() ||
         upperQuartile.size() != maximum.size() || maximum.size() != keys.size())
         qDebug() << Q_FUNC_INFO
                  << "keys, minimum, lowerQuartile, median, upperQuartile, maximum have different sizes:" << keys.size()
                  << minimum.size() << lowerQuartile.size() << median.size() << upperQuartile.size() << maximum.size();
     const int n =
         qMin(keys.size(), qMin(minimum.size(), qMin(lowerQuartile.size(),
                                                     qMin(median.size(), qMin(upperQuartile.size(), maximum.size())))));
     QVector<QCPStatisticalBoxData> tempData(n);
     QVector<QCPStatisticalBoxData>::iterator it          = tempData.begin();
     const QVector<QCPStatisticalBoxData>::iterator itEnd = tempData.end();
     int i                                                = 0;
     while (it != itEnd)
     {
         it->key           = keys[i];
         it->minimum       = minimum[i];
         it->lowerQuartile = lowerQuartile[i];
         it->median        = median[i];
         it->upperQuartile = upperQuartile[i];
         it->maximum       = maximum[i];
         ++it;
         ++i;
     }
     mDataContainer->add(tempData, alreadySorted); // don't modify tempData beyond this to prevent copy on write
 }
 
 /*! \overload
 
   Adds the provided data point as \a key, \a minimum, \a lowerQuartile, \a median, \a upperQuartile
   and \a maximum to the current data.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 */
 void QCPStatisticalBox::addData(double key, double minimum, double lowerQuartile, double median, double upperQuartile,
                                 double maximum, const QVector<double> &outliers)
 {
     mDataContainer->add(QCPStatisticalBoxData(key, minimum, lowerQuartile, median, upperQuartile, maximum, outliers));
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::selectTestRect
 */
 QCPDataSelection QCPStatisticalBox::selectTestRect(const QRectF &rect, bool onlySelectable) const
 {
     QCPDataSelection result;
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return result;
     if (!mKeyAxis || !mValueAxis)
         return result;
 
     QCPStatisticalBoxDataContainer::const_iterator visibleBegin, visibleEnd;
     getVisibleDataBounds(visibleBegin, visibleEnd);
 
     for (QCPStatisticalBoxDataContainer::const_iterator it = visibleBegin; it != visibleEnd; ++it)
     {
         if (rect.intersects(getQuartileBox(it)))
             result.addDataRange(QCPDataRange(it - mDataContainer->constBegin(), it - mDataContainer->constBegin() + 1),
                                 false);
     }
     result.simplify();
     return result;
 }
 
 /* inherits documentation from base class */
 double QCPStatisticalBox::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     if (mKeyAxis->axisRect()->rect().contains(pos.toPoint()))
     {
         // get visible data range:
         QCPStatisticalBoxDataContainer::const_iterator visibleBegin, visibleEnd;
         QCPStatisticalBoxDataContainer::const_iterator closestDataPoint = mDataContainer->constEnd();
         getVisibleDataBounds(visibleBegin, visibleEnd);
         double minDistSqr = std::numeric_limits<double>::max();
         for (QCPStatisticalBoxDataContainer::const_iterator it = visibleBegin; it != visibleEnd; ++it)
         {
             if (getQuartileBox(it).contains(pos)) // quartile box
             {
                 double currentDistSqr =
                     mParentPlot->selectionTolerance() * 0.99 * mParentPlot->selectionTolerance() * 0.99;
                 if (currentDistSqr < minDistSqr)
                 {
                     minDistSqr       = currentDistSqr;
                     closestDataPoint = it;
                 }
             }
             else // whiskers
             {
                 const QVector<QLineF> whiskerBackbones(getWhiskerBackboneLines(it));
                 for (int i = 0; i < whiskerBackbones.size(); ++i)
                 {
                     double currentDistSqr = QCPVector2D(pos).distanceSquaredToLine(whiskerBackbones.at(i));
                     if (currentDistSqr < minDistSqr)
                     {
                         minDistSqr       = currentDistSqr;
                         closestDataPoint = it;
                     }
                 }
             }
         }
         if (details)
         {
             int pointIndex = closestDataPoint - mDataContainer->constBegin();
             details->setValue(QCPDataSelection(QCPDataRange(pointIndex, pointIndex + 1)));
         }
         return qSqrt(minDistSqr);
     }
     return -1;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPStatisticalBox::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const
 {
     QCPRange range = mDataContainer->keyRange(foundRange, inSignDomain);
     // determine exact range by including width of bars/flags:
     if (foundRange)
     {
         if (inSignDomain != QCP::sdPositive || range.lower - mWidth * 0.5 > 0)
             range.lower -= mWidth * 0.5;
         if (inSignDomain != QCP::sdNegative || range.upper + mWidth * 0.5 < 0)
             range.upper += mWidth * 0.5;
     }
     return range;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPStatisticalBox::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain,
                                           const QCPRange &inKeyRange) const
 {
     return mDataContainer->valueRange(foundRange, inSignDomain, inKeyRange);
 }
 
 /* inherits documentation from base class */
 void QCPStatisticalBox::draw(QCPPainter *painter)
 {
     if (mDataContainer->isEmpty())
         return;
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     QCPStatisticalBoxDataContainer::const_iterator visibleBegin, visibleEnd;
     getVisibleDataBounds(visibleBegin, visibleEnd);
 
     // loop over and draw segments of unselected/selected data:
     QList<QCPDataRange> selectedSegments, unselectedSegments, allSegments;
     getDataSegments(selectedSegments, unselectedSegments);
     allSegments << unselectedSegments << selectedSegments;
     for (int i = 0; i < allSegments.size(); ++i)
     {
         bool isSelectedSegment                               = i >= unselectedSegments.size();
         QCPStatisticalBoxDataContainer::const_iterator begin = visibleBegin;
         QCPStatisticalBoxDataContainer::const_iterator end   = visibleEnd;
         mDataContainer->limitIteratorsToDataRange(begin, end, allSegments.at(i));
         if (begin == end)
             continue;
 
         for (QCPStatisticalBoxDataContainer::const_iterator it = begin; it != end; ++it)
         {
 // check data validity if flag set:
 #ifdef QCUSTOMPLOT_CHECK_DATA
             if (QCP::isInvalidData(it->key, it->minimum) || QCP::isInvalidData(it->lowerQuartile, it->median) ||
                 QCP::isInvalidData(it->upperQuartile, it->maximum))
                 qDebug() << Q_FUNC_INFO << "Data point at" << it->key << "of drawn range has invalid data."
                          << "Plottable name:" << name();
             for (int i = 0; i < it->outliers.size(); ++i)
                 if (QCP::isInvalidData(it->outliers.at(i)))
                     qDebug() << Q_FUNC_INFO << "Data point outlier at" << it->key << "of drawn range invalid."
                              << "Plottable name:" << name();
 #endif
 
             if (isSelectedSegment && mSelectionDecorator)
             {
                 mSelectionDecorator->applyPen(painter);
                 mSelectionDecorator->applyBrush(painter);
             }
             else
             {
                 painter->setPen(mPen);
                 painter->setBrush(mBrush);
             }
             QCPScatterStyle finalOutlierStyle = mOutlierStyle;
             if (isSelectedSegment && mSelectionDecorator)
                 finalOutlierStyle = mSelectionDecorator->getFinalScatterStyle(mOutlierStyle);
             drawStatisticalBox(painter, it, finalOutlierStyle);
         }
     }
 
     // draw other selection decoration that isn't just line/scatter pens and brushes:
     if (mSelectionDecorator)
         mSelectionDecorator->drawDecoration(painter, selection());
 }
 
 /* inherits documentation from base class */
 void QCPStatisticalBox::drawLegendIcon(QCPPainter *painter, const QRectF &rect) const
 {
     // draw filled rect:
     applyDefaultAntialiasingHint(painter);
     painter->setPen(mPen);
     painter->setBrush(mBrush);
     QRectF r = QRectF(0, 0, rect.width() * 0.67, rect.height() * 0.67);
     r.moveCenter(rect.center());
     painter->drawRect(r);
 }
 
 /*!
   Draws the graphical representation of a single statistical box with the data given by the
   iterator \a it with the provided \a painter.
 
   If the statistical box has a set of outlier data points, they are drawn with \a outlierStyle.
 
   \see getQuartileBox, getWhiskerBackboneLines, getWhiskerBarLines
 */
 void QCPStatisticalBox::drawStatisticalBox(QCPPainter *painter, QCPStatisticalBoxDataContainer::const_iterator it,
                                            const QCPScatterStyle &outlierStyle) const
 {
     // draw quartile box:
     applyDefaultAntialiasingHint(painter);
     const QRectF quartileBox = getQuartileBox(it);
     painter->drawRect(quartileBox);
     // draw median line with cliprect set to quartile box:
     painter->save();
     painter->setClipRect(quartileBox, Qt::IntersectClip);
     painter->setPen(mMedianPen);
     painter->drawLine(
         QLineF(coordsToPixels(it->key - mWidth * 0.5, it->median), coordsToPixels(it->key + mWidth * 0.5, it->median)));
     painter->restore();
     // draw whisker lines:
     applyAntialiasingHint(painter, mWhiskerAntialiased, QCP::aePlottables);
     painter->setPen(mWhiskerPen);
     painter->drawLines(getWhiskerBackboneLines(it));
     painter->setPen(mWhiskerBarPen);
     painter->drawLines(getWhiskerBarLines(it));
     // draw outliers:
     applyScattersAntialiasingHint(painter);
     outlierStyle.applyTo(painter, mPen);
     for (int i = 0; i < it->outliers.size(); ++i)
         outlierStyle.drawShape(painter, coordsToPixels(it->key, it->outliers.at(i)));
 }
 
 /*!  \internal
 
   called by \ref draw to determine which data (key) range is visible at the current key axis range
   setting, so only that needs to be processed. It also takes into account the bar width.
 
   \a begin returns an iterator to the lowest data point that needs to be taken into account when
   plotting. Note that in order to get a clean plot all the way to the edge of the axis rect, \a
   lower may still be just outside the visible range.
 
   \a end returns an iterator one higher than the highest visible data point. Same as before, \a end
   may also lie just outside of the visible range.
 
   if the plottable contains no data, both \a begin and \a end point to constEnd.
 */
 void QCPStatisticalBox::getVisibleDataBounds(QCPStatisticalBoxDataContainer::const_iterator &begin,
                                              QCPStatisticalBoxDataContainer::const_iterator &end) const
 {
     if (!mKeyAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key axis";
         begin = mDataContainer->constEnd();
         end   = mDataContainer->constEnd();
         return;
     }
     begin =
         mDataContainer->findBegin(mKeyAxis.data()->range().lower -
                                   mWidth * 0.5); // subtract half width of box to include partially visible data points
     end = mDataContainer->findEnd(mKeyAxis.data()->range().upper +
                                   mWidth * 0.5); // add half width of box to include partially visible data points
 }
 
 /*!  \internal
 
   Returns the box in plot coordinates (keys in x, values in y of the returned rect) that covers the
   value range from the lower to the upper quartile, of the data given by \a it.
 
   \see drawStatisticalBox, getWhiskerBackboneLines, getWhiskerBarLines
 */
 QRectF QCPStatisticalBox::getQuartileBox(QCPStatisticalBoxDataContainer::const_iterator it) const
 {
     QRectF result;
     result.setTopLeft(coordsToPixels(it->key - mWidth * 0.5, it->upperQuartile));
     result.setBottomRight(coordsToPixels(it->key + mWidth * 0.5, it->lowerQuartile));
     return result;
 }
 
 /*!  \internal
 
   Returns the whisker backbones (keys in x, values in y of the returned lines) that cover the value
   range from the minimum to the lower quartile, and from the upper quartile to the maximum of the
   data given by \a it.
 
   \see drawStatisticalBox, getQuartileBox, getWhiskerBarLines
 */
 QVector<QLineF> QCPStatisticalBox::getWhiskerBackboneLines(QCPStatisticalBoxDataContainer::const_iterator it) const
 {
     QVector<QLineF> result(2);
     result[0].setPoints(coordsToPixels(it->key, it->lowerQuartile),
                         coordsToPixels(it->key, it->minimum)); // min backbone
     result[1].setPoints(coordsToPixels(it->key, it->upperQuartile),
                         coordsToPixels(it->key, it->maximum)); // max backbone
     return result;
 }
 
 /*!  \internal
 
   Returns the whisker bars (keys in x, values in y of the returned lines) that are placed at the
   end of the whisker backbones, at the minimum and maximum of the data given by \a it.
 
   \see drawStatisticalBox, getQuartileBox, getWhiskerBackboneLines
 */
 QVector<QLineF> QCPStatisticalBox::getWhiskerBarLines(QCPStatisticalBoxDataContainer::const_iterator it) const
 {
     QVector<QLineF> result(2);
     result[0].setPoints(coordsToPixels(it->key - mWhiskerWidth * 0.5, it->minimum),
                         coordsToPixels(it->key + mWhiskerWidth * 0.5, it->minimum)); // min bar
     result[1].setPoints(coordsToPixels(it->key - mWhiskerWidth * 0.5, it->maximum),
                         coordsToPixels(it->key + mWhiskerWidth * 0.5, it->maximum)); // max bar
     return result;
 }
 /* end of 'src/plottables/plottable-statisticalbox.cpp' */
 
 /* including file 'src/plottables/plottable-colormap.cpp', size 47531        */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPColorMapData
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPColorMapData
   \brief Holds the two-dimensional data of a QCPColorMap plottable.
 
   This class is a data storage for \ref QCPColorMap. It holds a two-dimensional array, which \ref
   QCPColorMap then displays as a 2D image in the plot, where the array values are represented by a
   color, depending on the value.
 
   The size of the array can be controlled via \ref setSize (or \ref setKeySize, \ref setValueSize).
   Which plot coordinates these cells correspond to can be configured with \ref setRange (or \ref
   setKeyRange, \ref setValueRange).
 
   The data cells can be accessed in two ways: They can be directly addressed by an integer index
   with \ref setCell. This is the fastest method. Alternatively, they can be addressed by their plot
   coordinate with \ref setData. plot coordinate to cell index transformations and vice versa are
   provided by the functions \ref coordToCell and \ref cellToCoord.
 
   A \ref QCPColorMapData also holds an on-demand two-dimensional array of alpha values which (if
   allocated) has the same size as the data map. It can be accessed via \ref setAlpha, \ref
   fillAlpha and \ref clearAlpha. The memory for the alpha map is only allocated if needed, i.e. on
   the first call of \ref setAlpha. \ref clearAlpha restores full opacity and frees the alpha map.
 
   This class also buffers the minimum and maximum values that are in the data set, to provide
   QCPColorMap::rescaleDataRange with the necessary information quickly. Setting a cell to a value
   that is greater than the current maximum increases this maximum to the new value. However,
   setting the cell that currently holds the maximum value to a smaller value doesn't decrease the
   maximum again, because finding the true new maximum would require going through the entire data
   array, which might be time consuming. The same holds for the data minimum. This functionality is
   given by \ref recalculateDataBounds, such that you can decide when it is sensible to find the
   true current minimum and maximum. The method QCPColorMap::rescaleDataRange offers a convenience
   parameter \a recalculateDataBounds which may be set to true to automatically call \ref
   recalculateDataBounds internally.
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn bool QCPColorMapData::isEmpty() const
 
   Returns whether this instance carries no data. This is equivalent to having a size where at least
   one of the dimensions is 0 (see \ref setSize).
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs a new QCPColorMapData instance. The instance has \a keySize cells in the key direction
   and \a valueSize cells in the value direction. These cells will be displayed by the \ref QCPColorMap
   at the coordinates \a keyRange and \a valueRange.
 
   \see setSize, setKeySize, setValueSize, setRange, setKeyRange, setValueRange
 */
 QCPColorMapData::QCPColorMapData(int keySize, int valueSize, const QCPRange &keyRange, const QCPRange &valueRange)
-    : mKeySize(0), mValueSize(0), mKeyRange(keyRange), mValueRange(valueRange), mIsEmpty(true), mData(0), mAlpha(0),
+    : mKeySize(0), mValueSize(0), mKeyRange(keyRange), mValueRange(valueRange), mIsEmpty(true), mData(nullptr), mAlpha(nullptr),
       mDataModified(true)
 {
     setSize(keySize, valueSize);
     fill(0);
 }
 
 QCPColorMapData::~QCPColorMapData()
 {
     if (mData)
         delete[] mData;
     if (mAlpha)
         delete[] mAlpha;
 }
 
 /*!
   Constructs a new QCPColorMapData instance copying the data and range of \a other.
 */
 QCPColorMapData::QCPColorMapData(const QCPColorMapData &other)
-    : mKeySize(0), mValueSize(0), mIsEmpty(true), mData(0), mAlpha(0), mDataModified(true)
+    : mKeySize(0), mValueSize(0), mIsEmpty(true), mData(nullptr), mAlpha(nullptr), mDataModified(true)
 {
     *this = other;
 }
 
 /*!
   Overwrites this color map data instance with the data stored in \a other. The alpha map state is
   transferred, too.
 */
 QCPColorMapData &QCPColorMapData::operator=(const QCPColorMapData &other)
 {
     if (&other != this)
     {
         const int keySize   = other.keySize();
         const int valueSize = other.valueSize();
         if (!other.mAlpha && mAlpha)
             clearAlpha();
         setSize(keySize, valueSize);
         if (other.mAlpha && !mAlpha)
             createAlpha(false);
         setRange(other.keyRange(), other.valueRange());
         if (!isEmpty())
         {
             memcpy(mData, other.mData, sizeof(mData[0]) * keySize * valueSize);
             if (mAlpha)
                 memcpy(mAlpha, other.mAlpha, sizeof(mAlpha[0]) * keySize * valueSize);
         }
         mDataBounds   = other.mDataBounds;
         mDataModified = true;
     }
     return *this;
 }
 
 /* undocumented getter */
 double QCPColorMapData::data(double key, double value)
 {
     int keyCell   = (key - mKeyRange.lower) / (mKeyRange.upper - mKeyRange.lower) * (mKeySize - 1) + 0.5;
     int valueCell = (value - mValueRange.lower) / (mValueRange.upper - mValueRange.lower) * (mValueSize - 1) + 0.5;
     if (keyCell >= 0 && keyCell < mKeySize && valueCell >= 0 && valueCell < mValueSize)
         return mData[valueCell * mKeySize + keyCell];
     else
         return 0;
 }
 
 /* undocumented getter */
 double QCPColorMapData::cell(int keyIndex, int valueIndex)
 {
     if (keyIndex >= 0 && keyIndex < mKeySize && valueIndex >= 0 && valueIndex < mValueSize)
         return mData[valueIndex * mKeySize + keyIndex];
     else
         return 0;
 }
 
 /*!
   Returns the alpha map value of the cell with the indices \a keyIndex and \a valueIndex.
 
   If this color map data doesn't have an alpha map (because \ref setAlpha was never called after
   creation or after a call to \ref clearAlpha), returns 255, which corresponds to full opacity.
 
   \see setAlpha
 */
 unsigned char QCPColorMapData::alpha(int keyIndex, int valueIndex)
 {
     if (mAlpha && keyIndex >= 0 && keyIndex < mKeySize && valueIndex >= 0 && valueIndex < mValueSize)
         return mAlpha[valueIndex * mKeySize + keyIndex];
     else
         return 255;
 }
 
 /*!
   Resizes the data array to have \a keySize cells in the key dimension and \a valueSize cells in
   the value dimension.
 
   The current data is discarded and the map cells are set to 0, unless the map had already the
   requested size.
 
   Setting at least one of \a keySize or \a valueSize to zero frees the internal data array and \ref
   isEmpty returns true.
 
   \see setRange, setKeySize, setValueSize
 */
 void QCPColorMapData::setSize(int keySize, int valueSize)
 {
     if (keySize != mKeySize || valueSize != mValueSize)
     {
         mKeySize   = keySize;
         mValueSize = valueSize;
         if (mData)
             delete[] mData;
         mIsEmpty = mKeySize == 0 || mValueSize == 0;
         if (!mIsEmpty)
         {
 #ifdef __EXCEPTIONS
             try // 2D arrays get memory intensive fast. So if the allocation fails, at least output debug message
             {
 #endif
                 mData = new double[mKeySize * mValueSize];
 #ifdef __EXCEPTIONS
             }
             catch (...)
             {
                 mData = 0;
             }
 #endif
             if (mData)
                 fill(0);
             else
                 qDebug() << Q_FUNC_INFO << "out of memory for data dimensions " << mKeySize << "*" << mValueSize;
         }
         else
-            mData = 0;
+            mData = nullptr;
 
         if (mAlpha) // if we had an alpha map, recreate it with new size
             createAlpha();
 
         mDataModified = true;
     }
 }
 
 /*!
   Resizes the data array to have \a keySize cells in the key dimension.
 
   The current data is discarded and the map cells are set to 0, unless the map had already the
   requested size.
 
   Setting \a keySize to zero frees the internal data array and \ref isEmpty returns true.
 
   \see setKeyRange, setSize, setValueSize
 */
 void QCPColorMapData::setKeySize(int keySize)
 {
     setSize(keySize, mValueSize);
 }
 
 /*!
   Resizes the data array to have \a valueSize cells in the value dimension.
 
   The current data is discarded and the map cells are set to 0, unless the map had already the
   requested size.
 
   Setting \a valueSize to zero frees the internal data array and \ref isEmpty returns true.
 
   \see setValueRange, setSize, setKeySize
 */
 void QCPColorMapData::setValueSize(int valueSize)
 {
     setSize(mKeySize, valueSize);
 }
 
 /*!
   Sets the coordinate ranges the data shall be distributed over. This defines the rectangular area
   covered by the color map in plot coordinates.
 
   The outer cells will be centered on the range boundaries given to this function. For example, if
   the key size (\ref setKeySize) is 3 and \a keyRange is set to <tt>QCPRange(2, 3)</tt> there will
   be cells centered on the key coordinates 2, 2.5 and 3.
 
   \see setSize
 */
 void QCPColorMapData::setRange(const QCPRange &keyRange, const QCPRange &valueRange)
 {
     setKeyRange(keyRange);
     setValueRange(valueRange);
 }
 
 /*!
   Sets the coordinate range the data shall be distributed over in the key dimension. Together with
   the value range, This defines the rectangular area covered by the color map in plot coordinates.
 
   The outer cells will be centered on the range boundaries given to this function. For example, if
   the key size (\ref setKeySize) is 3 and \a keyRange is set to <tt>QCPRange(2, 3)</tt> there will
   be cells centered on the key coordinates 2, 2.5 and 3.
 
   \see setRange, setValueRange, setSize
 */
 void QCPColorMapData::setKeyRange(const QCPRange &keyRange)
 {
     mKeyRange = keyRange;
 }
 
 /*!
   Sets the coordinate range the data shall be distributed over in the value dimension. Together with
   the key range, This defines the rectangular area covered by the color map in plot coordinates.
 
   The outer cells will be centered on the range boundaries given to this function. For example, if
   the value size (\ref setValueSize) is 3 and \a valueRange is set to <tt>QCPRange(2, 3)</tt> there
   will be cells centered on the value coordinates 2, 2.5 and 3.
 
   \see setRange, setKeyRange, setSize
 */
 void QCPColorMapData::setValueRange(const QCPRange &valueRange)
 {
     mValueRange = valueRange;
 }
 
 /*!
   Sets the data of the cell, which lies at the plot coordinates given by \a key and \a value, to \a
   z.
 
   \note The QCPColorMap always displays the data at equal key/value intervals, even if the key or
   value axis is set to a logarithmic scaling. If you want to use QCPColorMap with logarithmic axes,
   you shouldn't use the \ref QCPColorMapData::setData method as it uses a linear transformation to
   determine the cell index. Rather directly access the cell index with \ref
   QCPColorMapData::setCell.
 
   \see setCell, setRange
 */
 void QCPColorMapData::setData(double key, double value, double z)
 {
     int keyCell   = (key - mKeyRange.lower) / (mKeyRange.upper - mKeyRange.lower) * (mKeySize - 1) + 0.5;
     int valueCell = (value - mValueRange.lower) / (mValueRange.upper - mValueRange.lower) * (mValueSize - 1) + 0.5;
     if (keyCell >= 0 && keyCell < mKeySize && valueCell >= 0 && valueCell < mValueSize)
     {
         mData[valueCell * mKeySize + keyCell] = z;
         if (z < mDataBounds.lower)
             mDataBounds.lower = z;
         if (z > mDataBounds.upper)
             mDataBounds.upper = z;
         mDataModified = true;
     }
 }
 
 /*!
   Sets the data of the cell with indices \a keyIndex and \a valueIndex to \a z. The indices
   enumerate the cells starting from zero, up to the map's size-1 in the respective dimension (see
   \ref setSize).
 
   In the standard plot configuration (horizontal key axis and vertical value axis, both not
   range-reversed), the cell with indices (0, 0) is in the bottom left corner and the cell with
   indices (keySize-1, valueSize-1) is in the top right corner of the color map.
 
   \see setData, setSize
 */
 void QCPColorMapData::setCell(int keyIndex, int valueIndex, double z)
 {
     if (keyIndex >= 0 && keyIndex < mKeySize && valueIndex >= 0 && valueIndex < mValueSize)
     {
         mData[valueIndex * mKeySize + keyIndex] = z;
         if (z < mDataBounds.lower)
             mDataBounds.lower = z;
         if (z > mDataBounds.upper)
             mDataBounds.upper = z;
         mDataModified = true;
     }
     else
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << keyIndex << valueIndex;
 }
 
 /*!
   Sets the alpha of the color map cell given by \a keyIndex and \a valueIndex to \a alpha. A value
   of 0 for \a alpha results in a fully transparent cell, and a value of 255 results in a fully
   opaque cell.
 
   If an alpha map doesn't exist yet for this color map data, it will be created here. If you wish
   to restore full opacity and free any allocated memory of the alpha map, call \ref clearAlpha.
 
   Note that the cell-wise alpha which can be configured here is independent of any alpha configured
   in the color map's gradient (\ref QCPColorGradient). If a cell is affected both by the cell-wise
   and gradient alpha, the alpha values will be blended accordingly during rendering of the color
   map.
 
   \see fillAlpha, clearAlpha
 */
 void QCPColorMapData::setAlpha(int keyIndex, int valueIndex, unsigned char alpha)
 {
     if (keyIndex >= 0 && keyIndex < mKeySize && valueIndex >= 0 && valueIndex < mValueSize)
     {
         if (mAlpha || createAlpha())
         {
             mAlpha[valueIndex * mKeySize + keyIndex] = alpha;
             mDataModified                            = true;
         }
     }
     else
         qDebug() << Q_FUNC_INFO << "index out of bounds:" << keyIndex << valueIndex;
 }
 
 /*!
   Goes through the data and updates the buffered minimum and maximum data values.
 
   Calling this method is only advised if you are about to call \ref QCPColorMap::rescaleDataRange
   and can not guarantee that the cells holding the maximum or minimum data haven't been overwritten
   with a smaller or larger value respectively, since the buffered maximum/minimum values have been
   updated the last time. Why this is the case is explained in the class description (\ref
   QCPColorMapData).
 
   Note that the method \ref QCPColorMap::rescaleDataRange provides a parameter \a
   recalculateDataBounds for convenience. Setting this to true will call this method for you, before
   doing the rescale.
 */
 void QCPColorMapData::recalculateDataBounds()
 {
     if (mKeySize > 0 && mValueSize > 0)
     {
         double minHeight    = mData[0];
         double maxHeight    = mData[0];
         const int dataCount = mValueSize * mKeySize;
         for (int i = 0; i < dataCount; ++i)
         {
             if (mData[i] > maxHeight)
                 maxHeight = mData[i];
             if (mData[i] < minHeight)
                 minHeight = mData[i];
         }
         mDataBounds.lower = minHeight;
         mDataBounds.upper = maxHeight;
     }
 }
 
 /*!
   Frees the internal data memory.
 
   This is equivalent to calling \ref setSize "setSize(0, 0)".
 */
 void QCPColorMapData::clear()
 {
     setSize(0, 0);
 }
 
 /*!
   Frees the internal alpha map. The color map will have full opacity again.
 */
 void QCPColorMapData::clearAlpha()
 {
     if (mAlpha)
     {
         delete[] mAlpha;
-        mAlpha        = 0;
+        mAlpha        = nullptr;
         mDataModified = true;
     }
 }
 
 /*!
   Sets all cells to the value \a z.
 */
 void QCPColorMapData::fill(double z)
 {
     const int dataCount = mValueSize * mKeySize;
     for (int i = 0; i < dataCount; ++i)
         mData[i] = z;
     mDataBounds   = QCPRange(z, z);
     mDataModified = true;
 }
 
 /*!
   Sets the opacity of all color map cells to \a alpha. A value of 0 for \a alpha results in a fully
   transparent color map, and a value of 255 results in a fully opaque color map.
 
   If you wish to restore opacity to 100% and free any used memory for the alpha map, rather use
   \ref clearAlpha.
 
   \see setAlpha
 */
 void QCPColorMapData::fillAlpha(unsigned char alpha)
 {
     if (mAlpha || createAlpha(false))
     {
         const int dataCount = mValueSize * mKeySize;
         for (int i = 0; i < dataCount; ++i)
             mAlpha[i] = alpha;
         mDataModified = true;
     }
 }
 
 /*!
   Transforms plot coordinates given by \a key and \a value to cell indices of this QCPColorMapData
   instance. The resulting cell indices are returned via the output parameters \a keyIndex and \a
   valueIndex.
 
   The retrieved key/value cell indices can then be used for example with \ref setCell.
 
   If you are only interested in a key or value index, you may pass 0 as \a valueIndex or \a
   keyIndex.
 
   \note The QCPColorMap always displays the data at equal key/value intervals, even if the key or
   value axis is set to a logarithmic scaling. If you want to use QCPColorMap with logarithmic axes,
   you shouldn't use the \ref QCPColorMapData::coordToCell method as it uses a linear transformation to
   determine the cell index.
 
   \see cellToCoord, QCPAxis::coordToPixel
 */
 void QCPColorMapData::coordToCell(double key, double value, int *keyIndex, int *valueIndex) const
 {
     if (keyIndex)
         *keyIndex = (key - mKeyRange.lower) / (mKeyRange.upper - mKeyRange.lower) * (mKeySize - 1) + 0.5;
     if (valueIndex)
         *valueIndex = (value - mValueRange.lower) / (mValueRange.upper - mValueRange.lower) * (mValueSize - 1) + 0.5;
 }
 
 /*!
   Transforms cell indices given by \a keyIndex and \a valueIndex to cell indices of this QCPColorMapData
   instance. The resulting coordinates are returned via the output parameters \a key and \a
   value.
 
   If you are only interested in a key or value coordinate, you may pass 0 as \a key or \a
   value.
 
   \note The QCPColorMap always displays the data at equal key/value intervals, even if the key or
   value axis is set to a logarithmic scaling. If you want to use QCPColorMap with logarithmic axes,
   you shouldn't use the \ref QCPColorMapData::cellToCoord method as it uses a linear transformation to
   determine the cell index.
 
   \see coordToCell, QCPAxis::pixelToCoord
 */
 void QCPColorMapData::cellToCoord(int keyIndex, int valueIndex, double *key, double *value) const
 {
     if (key)
         *key = keyIndex / (double)(mKeySize - 1) * (mKeyRange.upper - mKeyRange.lower) + mKeyRange.lower;
     if (value)
         *value = valueIndex / (double)(mValueSize - 1) * (mValueRange.upper - mValueRange.lower) + mValueRange.lower;
 }
 
 /*! \internal
 
   Allocates the internal alpha map with the current data map key/value size and, if \a
   initializeOpaque is true, initializes all values to 255. If \a initializeOpaque is false, the
   values are not initialized at all. In this case, the alpha map should be initialized manually,
   e.g. with \ref fillAlpha.
 
   If an alpha map exists already, it is deleted first. If this color map is empty (has either key
   or value size zero, see \ref isEmpty), the alpha map is cleared.
 
   The return value indicates the existence of the alpha map after the call. So this method returns
   true if the data map isn't empty and an alpha map was successfully allocated.
 */
 bool QCPColorMapData::createAlpha(bool initializeOpaque)
 {
     clearAlpha();
     if (isEmpty())
         return false;
 
 #ifdef __EXCEPTIONS
     try // 2D arrays get memory intensive fast. So if the allocation fails, at least output debug message
     {
 #endif
         mAlpha = new unsigned char[mKeySize * mValueSize];
 #ifdef __EXCEPTIONS
     }
     catch (...)
     {
         mAlpha = 0;
     }
 #endif
     if (mAlpha)
     {
         if (initializeOpaque)
             fillAlpha(255);
         return true;
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "out of memory for data dimensions " << mKeySize << "*" << mValueSize;
         return false;
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPColorMap
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPColorMap
   \brief A plottable representing a two-dimensional color map in a plot.
 
   \image html QCPColorMap.png
 
   The data is stored in the class \ref QCPColorMapData, which can be accessed via the data()
   method.
 
   A color map has three dimensions to represent a data point: The \a key dimension, the \a value
   dimension and the \a data dimension. As with other plottables such as graphs, \a key and \a value
   correspond to two orthogonal axes on the QCustomPlot surface that you specify in the QCPColorMap
   constructor. The \a data dimension however is encoded as the color of the point at (\a key, \a
   value).
 
   Set the number of points (or \a cells) in the key/value dimension via \ref
   QCPColorMapData::setSize. The plot coordinate range over which these points will be displayed is
   specified via \ref QCPColorMapData::setRange. The first cell will be centered on the lower range
   boundary and the last cell will be centered on the upper range boundary. The data can be set by
   either accessing the cells directly with QCPColorMapData::setCell or by addressing the cells via
   their plot coordinates with \ref QCPColorMapData::setData. If possible, you should prefer
   setCell, since it doesn't need to do any coordinate transformation and thus performs a bit
   better.
 
   The cell with index (0, 0) is at the bottom left, if the color map uses normal (i.e. not reversed)
   key and value axes.
 
   To show the user which colors correspond to which \a data values, a \ref QCPColorScale is
   typically placed to the right of the axis rect. See the documentation there for details on how to
   add and use a color scale.
 
   \section qcpcolormap-appearance Changing the appearance
 
   The central part of the appearance is the color gradient, which can be specified via \ref
   setGradient. See the documentation of \ref QCPColorGradient for details on configuring a color
   gradient.
 
   The \a data range that is mapped to the colors of the gradient can be specified with \ref
   setDataRange. To make the data range encompass the whole data set minimum to maximum, call \ref
   rescaleDataRange.
 
   \section qcpcolormap-transparency Transparency
 
   Transparency in color maps can be achieved by two mechanisms. On one hand, you can specify alpha
   values for color stops of the \ref QCPColorGradient, via the regular QColor interface. This will
   cause the color map data which gets mapped to colors around those color stops to appear with the
   accordingly interpolated transparency.
 
   On the other hand you can also directly apply an alpha value to each cell independent of its
   data, by using the alpha map feature of \ref QCPColorMapData. The relevant methods are \ref
   QCPColorMapData::setAlpha, QCPColorMapData::fillAlpha and \ref QCPColorMapData::clearAlpha().
 
   The two transparencies will be joined together in the plot and otherwise not interfere with each
   other. They are mixed in a multiplicative matter, so an alpha of e.g. 50% (128/255) in both modes
   simultaneously, will result in a total transparency of 25% (64/255).
 
   \section qcpcolormap-usage Usage
 
   Like all data representing objects in QCustomPlot, the QCPColorMap is a plottable
   (QCPAbstractPlottable). So the plottable-interface of QCustomPlot applies
   (QCustomPlot::plottable, QCustomPlot::removePlottable, etc.)
 
   Usually, you first create an instance:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcolormap-creation-1
   which registers it with the QCustomPlot instance of the passed axes. Note that this QCustomPlot instance takes
   ownership of the plottable, so do not delete it manually but use QCustomPlot::removePlottable() instead.
   The newly created plottable can be modified, e.g.:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpcolormap-creation-2
 
   \note The QCPColorMap always displays the data at equal key/value intervals, even if the key or
   value axis is set to a logarithmic scaling. If you want to use QCPColorMap with logarithmic axes,
   you shouldn't use the \ref QCPColorMapData::setData method as it uses a linear transformation to
   determine the cell index. Rather directly access the cell index with \ref
   QCPColorMapData::setCell.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QCPColorMapData *QCPColorMap::data() const
 
   Returns a pointer to the internal data storage of type \ref QCPColorMapData. Access this to
   modify data points (cells) and the color map key/value range.
 
   \see setData
 */
 
 /* end documentation of inline functions */
 
 /* start documentation of signals */
 
 /*! \fn void QCPColorMap::dataRangeChanged(const QCPRange &newRange);
 
   This signal is emitted when the data range changes.
 
   \see setDataRange
 */
 
 /*! \fn void QCPColorMap::dataScaleTypeChanged(QCPAxis::ScaleType scaleType);
 
   This signal is emitted when the data scale type changes.
 
   \see setDataScaleType
 */
 
 /*! \fn void QCPColorMap::gradientChanged(const QCPColorGradient &newGradient);
 
   This signal is emitted when the gradient changes.
 
   \see setGradient
 */
 
 /* end documentation of signals */
 
 /*!
   Constructs a color map with the specified \a keyAxis and \a valueAxis.
 
   The created QCPColorMap is automatically registered with the QCustomPlot instance inferred from
   \a keyAxis. This QCustomPlot instance takes ownership of the QCPColorMap, so do not delete it
   manually but use QCustomPlot::removePlottable() instead.
 */
 QCPColorMap::QCPColorMap(QCPAxis *keyAxis, QCPAxis *valueAxis)
     : QCPAbstractPlottable(keyAxis, valueAxis), mDataScaleType(QCPAxis::stLinear),
       mMapData(new QCPColorMapData(10, 10, QCPRange(0, 5), QCPRange(0, 5))), mInterpolate(true), mTightBoundary(false),
       mMapImageInvalidated(true)
 {
 }
 
 QCPColorMap::~QCPColorMap()
 {
     delete mMapData;
 }
 
 /*!
   Replaces the current \ref data with the provided \a data.
 
   If \a copy is set to true, the \a data object will only be copied. if false, the color map
   takes ownership of the passed data and replaces the internal data pointer with it. This is
   significantly faster than copying for large datasets.
 */
 void QCPColorMap::setData(QCPColorMapData *data, bool copy)
 {
     if (mMapData == data)
     {
         qDebug() << Q_FUNC_INFO << "The data pointer is already in (and owned by) this plottable"
                  << reinterpret_cast<quintptr>(data);
         return;
     }
     if (copy)
     {
         *mMapData = *data;
     }
     else
     {
         delete mMapData;
         mMapData = data;
     }
     mMapImageInvalidated = true;
 }
 
 /*!
   Sets the data range of this color map to \a dataRange. The data range defines which data values
   are mapped to the color gradient.
 
   To make the data range span the full range of the data set, use \ref rescaleDataRange.
 
   \see QCPColorScale::setDataRange
 */
 void QCPColorMap::setDataRange(const QCPRange &dataRange)
 {
     if (!QCPRange::validRange(dataRange))
         return;
     if (mDataRange.lower != dataRange.lower || mDataRange.upper != dataRange.upper)
     {
         if (mDataScaleType == QCPAxis::stLogarithmic)
             mDataRange = dataRange.sanitizedForLogScale();
         else
             mDataRange = dataRange.sanitizedForLinScale();
         mMapImageInvalidated = true;
         emit dataRangeChanged(mDataRange);
     }
 }
 
 /*!
   Sets whether the data is correlated with the color gradient linearly or logarithmically.
 
   \see QCPColorScale::setDataScaleType
 */
 void QCPColorMap::setDataScaleType(QCPAxis::ScaleType scaleType)
 {
     if (mDataScaleType != scaleType)
     {
         mDataScaleType       = scaleType;
         mMapImageInvalidated = true;
         emit dataScaleTypeChanged(mDataScaleType);
         if (mDataScaleType == QCPAxis::stLogarithmic)
             setDataRange(mDataRange.sanitizedForLogScale());
     }
 }
 
 /*!
   Sets the color gradient that is used to represent the data. For more details on how to create an
   own gradient or use one of the preset gradients, see \ref QCPColorGradient.
 
   The colors defined by the gradient will be used to represent data values in the currently set
   data range, see \ref setDataRange. Data points that are outside this data range will either be
   colored uniformly with the respective gradient boundary color, or the gradient will repeat,
   depending on \ref QCPColorGradient::setPeriodic.
 
   \see QCPColorScale::setGradient
 */
 void QCPColorMap::setGradient(const QCPColorGradient &gradient)
 {
     if (mGradient != gradient)
     {
         mGradient            = gradient;
         mMapImageInvalidated = true;
         emit gradientChanged(mGradient);
     }
 }
 
 /*!
   Sets whether the color map image shall use bicubic interpolation when displaying the color map
   shrinked or expanded, and not at a 1:1 pixel-to-data scale.
 
   \image html QCPColorMap-interpolate.png "A 10*10 color map, with interpolation and without interpolation enabled"
 */
 void QCPColorMap::setInterpolate(bool enabled)
 {
     mInterpolate         = enabled;
     mMapImageInvalidated = true; // because oversampling factors might need to change
 }
 
 /*!
   Sets whether the outer most data rows and columns are clipped to the specified key and value
   range (see \ref QCPColorMapData::setKeyRange, \ref QCPColorMapData::setValueRange).
 
   if \a enabled is set to false, the data points at the border of the color map are drawn with the
   same width and height as all other data points. Since the data points are represented by
   rectangles of one color centered on the data coordinate, this means that the shown color map
   extends by half a data point over the specified key/value range in each direction.
 
   \image html QCPColorMap-tightboundary.png "A color map, with tight boundary enabled and disabled"
 */
 void QCPColorMap::setTightBoundary(bool enabled)
 {
     mTightBoundary = enabled;
 }
 
 /*!
   Associates the color scale \a colorScale with this color map.
 
   This means that both the color scale and the color map synchronize their gradient, data range and
   data scale type (\ref setGradient, \ref setDataRange, \ref setDataScaleType). Multiple color maps
   can be associated with one single color scale. This causes the color maps to also synchronize
   those properties, via the mutual color scale.
 
   This function causes the color map to adopt the current color gradient, data range and data scale
   type of \a colorScale. After this call, you may change these properties at either the color map
   or the color scale, and the setting will be applied to both.
 
   Pass 0 as \a colorScale to disconnect the color scale from this color map again.
 */
 void QCPColorMap::setColorScale(QCPColorScale *colorScale)
 {
     if (mColorScale) // unconnect signals from old color scale
     {
         disconnect(this, SIGNAL(dataRangeChanged(QCPRange)), mColorScale.data(), SLOT(setDataRange(QCPRange)));
         disconnect(this, SIGNAL(dataScaleTypeChanged(QCPAxis::ScaleType)), mColorScale.data(),
                    SLOT(setDataScaleType(QCPAxis::ScaleType)));
         disconnect(this, SIGNAL(gradientChanged(QCPColorGradient)), mColorScale.data(),
                    SLOT(setGradient(QCPColorGradient)));
         disconnect(mColorScale.data(), SIGNAL(dataRangeChanged(QCPRange)), this, SLOT(setDataRange(QCPRange)));
         disconnect(mColorScale.data(), SIGNAL(gradientChanged(QCPColorGradient)), this,
                    SLOT(setGradient(QCPColorGradient)));
         disconnect(mColorScale.data(), SIGNAL(dataScaleTypeChanged(QCPAxis::ScaleType)), this,
                    SLOT(setDataScaleType(QCPAxis::ScaleType)));
     }
     mColorScale = colorScale;
     if (mColorScale) // connect signals to new color scale
     {
         setGradient(mColorScale.data()->gradient());
         setDataRange(mColorScale.data()->dataRange());
         setDataScaleType(mColorScale.data()->dataScaleType());
         connect(this, SIGNAL(dataRangeChanged(QCPRange)), mColorScale.data(), SLOT(setDataRange(QCPRange)));
         connect(this, SIGNAL(dataScaleTypeChanged(QCPAxis::ScaleType)), mColorScale.data(),
                 SLOT(setDataScaleType(QCPAxis::ScaleType)));
         connect(this, SIGNAL(gradientChanged(QCPColorGradient)), mColorScale.data(),
                 SLOT(setGradient(QCPColorGradient)));
         connect(mColorScale.data(), SIGNAL(dataRangeChanged(QCPRange)), this, SLOT(setDataRange(QCPRange)));
         connect(mColorScale.data(), SIGNAL(gradientChanged(QCPColorGradient)), this,
                 SLOT(setGradient(QCPColorGradient)));
         connect(mColorScale.data(), SIGNAL(dataScaleTypeChanged(QCPAxis::ScaleType)), this,
                 SLOT(setDataScaleType(QCPAxis::ScaleType)));
     }
 }
 
 /*!
   Sets the data range (\ref setDataRange) to span the minimum and maximum values that occur in the
   current data set. This corresponds to the \ref rescaleKeyAxis or \ref rescaleValueAxis methods,
   only for the third data dimension of the color map.
 
   The minimum and maximum values of the data set are buffered in the internal QCPColorMapData
   instance (\ref data). As data is updated via its \ref QCPColorMapData::setCell or \ref
   QCPColorMapData::setData, the buffered minimum and maximum values are updated, too. For
   performance reasons, however, they are only updated in an expanding fashion. So the buffered
   maximum can only increase and the buffered minimum can only decrease. In consequence, changes to
   the data that actually lower the maximum of the data set (by overwriting the cell holding the
   current maximum with a smaller value), aren't recognized and the buffered maximum overestimates
   the true maximum of the data set. The same happens for the buffered minimum. To recalculate the
   true minimum and maximum by explicitly looking at each cell, the method
   QCPColorMapData::recalculateDataBounds can be used. For convenience, setting the parameter \a
   recalculateDataBounds calls this method before setting the data range to the buffered minimum and
   maximum.
 
   \see setDataRange
 */
 void QCPColorMap::rescaleDataRange(bool recalculateDataBounds)
 {
     if (recalculateDataBounds)
         mMapData->recalculateDataBounds();
     setDataRange(mMapData->dataBounds());
 }
 
 /*!
   Takes the current appearance of the color map and updates the legend icon, which is used to
   represent this color map in the legend (see \ref QCPLegend).
 
   The \a transformMode specifies whether the rescaling is done by a faster, low quality image
   scaling algorithm (Qt::FastTransformation) or by a slower, higher quality algorithm
   (Qt::SmoothTransformation).
 
   The current color map appearance is scaled down to \a thumbSize. Ideally, this should be equal to
   the size of the legend icon (see \ref QCPLegend::setIconSize). If it isn't exactly the configured
   legend icon size, the thumb will be rescaled during drawing of the legend item.
 
   \see setDataRange
 */
 void QCPColorMap::updateLegendIcon(Qt::TransformationMode transformMode, const QSize &thumbSize)
 {
     if (mMapImage.isNull() && !data()->isEmpty())
         updateMapImage(); // try to update map image if it's null (happens if no draw has happened yet)
 
     if (!mMapImage.isNull()) // might still be null, e.g. if data is empty, so check here again
     {
         bool mirrorX = (keyAxis()->orientation() == Qt::Horizontal ? keyAxis() : valueAxis())->rangeReversed();
         bool mirrorY = (valueAxis()->orientation() == Qt::Vertical ? valueAxis() : keyAxis())->rangeReversed();
         mLegendIcon  = QPixmap::fromImage(mMapImage.mirrored(mirrorX, mirrorY))
                           .scaled(thumbSize, Qt::KeepAspectRatio, transformMode);
     }
 }
 
 /* inherits documentation from base class */
 double QCPColorMap::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if ((onlySelectable && mSelectable == QCP::stNone) || mMapData->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     if (mKeyAxis.data()->axisRect()->rect().contains(pos.toPoint()))
     {
         double posKey, posValue;
         pixelsToCoords(pos, posKey, posValue);
         if (mMapData->keyRange().contains(posKey) && mMapData->valueRange().contains(posValue))
         {
             if (details)
                 details->setValue(QCPDataSelection(QCPDataRange(
                     0,
                     1))); // temporary solution, to facilitate whole-plottable selection. Replace in future version with segmented 2D selection.
             return mParentPlot->selectionTolerance() * 0.99;
         }
     }
     return -1;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPColorMap::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const
 {
     foundRange      = true;
     QCPRange result = mMapData->keyRange();
     result.normalize();
     if (inSignDomain == QCP::sdPositive)
     {
         if (result.lower <= 0 && result.upper > 0)
             result.lower = result.upper * 1e-3;
         else if (result.lower <= 0 && result.upper <= 0)
             foundRange = false;
     }
     else if (inSignDomain == QCP::sdNegative)
     {
         if (result.upper >= 0 && result.lower < 0)
             result.upper = result.lower * 1e-3;
         else if (result.upper >= 0 && result.lower >= 0)
             foundRange = false;
     }
     return result;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPColorMap::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain, const QCPRange &inKeyRange) const
 {
     if (inKeyRange != QCPRange())
     {
         if (mMapData->keyRange().upper < inKeyRange.lower || mMapData->keyRange().lower > inKeyRange.upper)
         {
             foundRange = false;
             return QCPRange();
         }
     }
 
     foundRange      = true;
     QCPRange result = mMapData->valueRange();
     result.normalize();
     if (inSignDomain == QCP::sdPositive)
     {
         if (result.lower <= 0 && result.upper > 0)
             result.lower = result.upper * 1e-3;
         else if (result.lower <= 0 && result.upper <= 0)
             foundRange = false;
     }
     else if (inSignDomain == QCP::sdNegative)
     {
         if (result.upper >= 0 && result.lower < 0)
             result.upper = result.lower * 1e-3;
         else if (result.upper >= 0 && result.lower >= 0)
             foundRange = false;
     }
     return result;
 }
 
 /*! \internal
 
   Updates the internal map image buffer by going through the internal \ref QCPColorMapData and
   turning the data values into color pixels with \ref QCPColorGradient::colorize.
 
   This method is called by \ref QCPColorMap::draw if either the data has been modified or the map image
   has been invalidated for a different reason (e.g. a change of the data range with \ref
   setDataRange).
 
   If the map cell count is low, the image created will be oversampled in order to avoid a
   QPainter::drawImage bug which makes inner pixel boundaries jitter when stretch-drawing images
   without smooth transform enabled. Accordingly, oversampling isn't performed if \ref
   setInterpolate is true.
 */
 void QCPColorMap::updateMapImage()
 {
     QCPAxis *keyAxis = mKeyAxis.data();
     if (!keyAxis)
         return;
     if (mMapData->isEmpty())
         return;
 
     const QImage::Format format = QImage::Format_ARGB32_Premultiplied;
     const int keySize           = mMapData->keySize();
     const int valueSize         = mMapData->valueSize();
     int keyOversamplingFactor =
         mInterpolate ?
             1 :
             (int)(1.0 +
                   100.0 /
                       (double)
                           keySize); // make mMapImage have at least size 100, factor becomes 1 if size > 200 or interpolation is on
     int valueOversamplingFactor =
         mInterpolate ?
             1 :
             (int)(1.0 +
                   100.0 /
                       (double)
                           valueSize); // make mMapImage have at least size 100, factor becomes 1 if size > 200 or interpolation is on
 
     // resize mMapImage to correct dimensions including possible oversampling factors, according to key/value axes orientation:
     if (keyAxis->orientation() == Qt::Horizontal && (mMapImage.width() != keySize * keyOversamplingFactor ||
                                                      mMapImage.height() != valueSize * valueOversamplingFactor))
         mMapImage = QImage(QSize(keySize * keyOversamplingFactor, valueSize * valueOversamplingFactor), format);
     else if (keyAxis->orientation() == Qt::Vertical && (mMapImage.width() != valueSize * valueOversamplingFactor ||
                                                         mMapImage.height() != keySize * keyOversamplingFactor))
         mMapImage = QImage(QSize(valueSize * valueOversamplingFactor, keySize * keyOversamplingFactor), format);
 
     QImage *localMapImage =
         &mMapImage; // this is the image on which the colorization operates. Either the final mMapImage, or if we need oversampling, mUndersampledMapImage
     if (keyOversamplingFactor > 1 || valueOversamplingFactor > 1)
     {
         // resize undersampled map image to actual key/value cell sizes:
         if (keyAxis->orientation() == Qt::Horizontal &&
             (mUndersampledMapImage.width() != keySize || mUndersampledMapImage.height() != valueSize))
             mUndersampledMapImage = QImage(QSize(keySize, valueSize), format);
         else if (keyAxis->orientation() == Qt::Vertical &&
                  (mUndersampledMapImage.width() != valueSize || mUndersampledMapImage.height() != keySize))
             mUndersampledMapImage = QImage(QSize(valueSize, keySize), format);
         localMapImage = &mUndersampledMapImage; // make the colorization run on the undersampled image
     }
     else if (!mUndersampledMapImage.isNull())
         mUndersampledMapImage =
             QImage(); // don't need oversampling mechanism anymore (map size has changed) but mUndersampledMapImage still has nonzero size, free it
 
     const double *rawData         = mMapData->mData;
     const unsigned char *rawAlpha = mMapData->mAlpha;
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         const int lineCount = valueSize;
         const int rowCount  = keySize;
         for (int line = 0; line < lineCount; ++line)
         {
             QRgb *pixels = reinterpret_cast<QRgb *>(localMapImage->scanLine(
                 lineCount - 1 -
                 line)); // invert scanline index because QImage counts scanlines from top, but our vertical index counts from bottom (mathematical coordinate system)
             if (rawAlpha)
                 mGradient.colorize(rawData + line * rowCount, rawAlpha + line * rowCount, mDataRange, pixels, rowCount,
                                    1, mDataScaleType == QCPAxis::stLogarithmic);
             else
                 mGradient.colorize(rawData + line * rowCount, mDataRange, pixels, rowCount, 1,
                                    mDataScaleType == QCPAxis::stLogarithmic);
         }
     }
     else // keyAxis->orientation() == Qt::Vertical
     {
         const int lineCount = keySize;
         const int rowCount  = valueSize;
         for (int line = 0; line < lineCount; ++line)
         {
             QRgb *pixels = reinterpret_cast<QRgb *>(localMapImage->scanLine(
                 lineCount - 1 -
                 line)); // invert scanline index because QImage counts scanlines from top, but our vertical index counts from bottom (mathematical coordinate system)
             if (rawAlpha)
                 mGradient.colorize(rawData + line, rawAlpha + line, mDataRange, pixels, rowCount, lineCount,
                                    mDataScaleType == QCPAxis::stLogarithmic);
             else
                 mGradient.colorize(rawData + line, mDataRange, pixels, rowCount, lineCount,
                                    mDataScaleType == QCPAxis::stLogarithmic);
         }
     }
 
     if (keyOversamplingFactor > 1 || valueOversamplingFactor > 1)
     {
         if (keyAxis->orientation() == Qt::Horizontal)
             mMapImage =
                 mUndersampledMapImage.scaled(keySize * keyOversamplingFactor, valueSize * valueOversamplingFactor,
                                              Qt::IgnoreAspectRatio, Qt::FastTransformation);
         else
             mMapImage =
                 mUndersampledMapImage.scaled(valueSize * valueOversamplingFactor, keySize * keyOversamplingFactor,
                                              Qt::IgnoreAspectRatio, Qt::FastTransformation);
     }
     mMapData->mDataModified = false;
     mMapImageInvalidated    = false;
 }
 
 /* inherits documentation from base class */
 void QCPColorMap::draw(QCPPainter *painter)
 {
     if (mMapData->isEmpty())
         return;
     if (!mKeyAxis || !mValueAxis)
         return;
     applyDefaultAntialiasingHint(painter);
 
     if (mMapData->mDataModified || mMapImageInvalidated)
         updateMapImage();
 
     // use buffer if painting vectorized (PDF):
     const bool useBuffer     = painter->modes().testFlag(QCPPainter::pmVectorized);
     QCPPainter *localPainter = painter; // will be redirected to paint on mapBuffer if painting vectorized
     QRectF
         mapBufferTarget; // the rect in absolute widget coordinates where the visible map portion/buffer will end up in
     QPixmap mapBuffer;
     if (useBuffer)
     {
         const double mapBufferPixelRatio = 3; // factor by which DPI is increased in embedded bitmaps
         mapBufferTarget                  = painter->clipRegion().boundingRect();
         mapBuffer                        = QPixmap((mapBufferTarget.size() * mapBufferPixelRatio).toSize());
         mapBuffer.fill(Qt::transparent);
         localPainter = new QCPPainter(&mapBuffer);
         localPainter->scale(mapBufferPixelRatio, mapBufferPixelRatio);
         localPainter->translate(-mapBufferTarget.topLeft());
     }
 
     QRectF imageRect = QRectF(coordsToPixels(mMapData->keyRange().lower, mMapData->valueRange().lower),
                               coordsToPixels(mMapData->keyRange().upper, mMapData->valueRange().upper))
                            .normalized();
     // extend imageRect to contain outer halves/quarters of bordering/cornering pixels (cells are centered on map range boundary):
     double halfCellWidth  = 0; // in pixels
     double halfCellHeight = 0; // in pixels
     if (keyAxis()->orientation() == Qt::Horizontal)
     {
         if (mMapData->keySize() > 1)
             halfCellWidth = 0.5 * imageRect.width() / (double)(mMapData->keySize() - 1);
         if (mMapData->valueSize() > 1)
             halfCellHeight = 0.5 * imageRect.height() / (double)(mMapData->valueSize() - 1);
     }
     else // keyAxis orientation is Qt::Vertical
     {
         if (mMapData->keySize() > 1)
             halfCellHeight = 0.5 * imageRect.height() / (double)(mMapData->keySize() - 1);
         if (mMapData->valueSize() > 1)
             halfCellWidth = 0.5 * imageRect.width() / (double)(mMapData->valueSize() - 1);
     }
     imageRect.adjust(-halfCellWidth, -halfCellHeight, halfCellWidth, halfCellHeight);
     const bool mirrorX      = (keyAxis()->orientation() == Qt::Horizontal ? keyAxis() : valueAxis())->rangeReversed();
     const bool mirrorY      = (valueAxis()->orientation() == Qt::Vertical ? valueAxis() : keyAxis())->rangeReversed();
     const bool smoothBackup = localPainter->renderHints().testFlag(QPainter::SmoothPixmapTransform);
     localPainter->setRenderHint(QPainter::SmoothPixmapTransform, mInterpolate);
     QRegion clipBackup;
     if (mTightBoundary)
     {
         clipBackup           = localPainter->clipRegion();
         QRectF tightClipRect = QRectF(coordsToPixels(mMapData->keyRange().lower, mMapData->valueRange().lower),
                                       coordsToPixels(mMapData->keyRange().upper, mMapData->valueRange().upper))
                                    .normalized();
         localPainter->setClipRect(tightClipRect, Qt::IntersectClip);
     }
     localPainter->drawImage(imageRect, mMapImage.mirrored(mirrorX, mirrorY));
     if (mTightBoundary)
         localPainter->setClipRegion(clipBackup);
     localPainter->setRenderHint(QPainter::SmoothPixmapTransform, smoothBackup);
 
     if (useBuffer) // localPainter painted to mapBuffer, so now draw buffer with original painter
     {
         delete localPainter;
         painter->drawPixmap(mapBufferTarget.toRect(), mapBuffer);
     }
 }
 
 /* inherits documentation from base class */
 void QCPColorMap::drawLegendIcon(QCPPainter *painter, const QRectF &rect) const
 {
     applyDefaultAntialiasingHint(painter);
     // draw map thumbnail:
     if (!mLegendIcon.isNull())
     {
         QPixmap scaledIcon = mLegendIcon.scaled(rect.size().toSize(), Qt::KeepAspectRatio, Qt::FastTransformation);
         QRectF iconRect    = QRectF(0, 0, scaledIcon.width(), scaledIcon.height());
         iconRect.moveCenter(rect.center());
         painter->drawPixmap(iconRect.topLeft(), scaledIcon);
     }
     /*
     // draw frame:
     painter->setBrush(Qt::NoBrush);
     painter->setPen(Qt::black);
     painter->drawRect(rect.adjusted(1, 1, 0, 0));
     */
 }
 /* end of 'src/plottables/plottable-colormap.cpp' */
 
 /* including file 'src/plottables/plottable-financial.cpp', size 42610       */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPFinancialData
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPFinancialData
   \brief Holds the data of one single data point for QCPFinancial.
 
   The stored data is:
   \li \a key: coordinate on the key axis of this data point (this is the \a mainKey and the \a sortKey)
   \li \a open: The opening value at the data point (this is the \a mainValue)
   \li \a high: The high/maximum value at the data point
   \li \a low: The low/minimum value at the data point
   \li \a close: The closing value at the data point
 
   The container for storing multiple data points is \ref QCPFinancialDataContainer. It is a typedef
   for \ref QCPDataContainer with \ref QCPFinancialData as the DataType template parameter. See the
   documentation there for an explanation regarding the data type's generic methods.
 
   \see QCPFinancialDataContainer
 */
 
 /* start documentation of inline functions */
 
 /*! \fn double QCPFinancialData::sortKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static QCPFinancialData QCPFinancialData::fromSortKey(double sortKey)
 
   Returns a data point with the specified \a sortKey. All other members are set to zero.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn static static bool QCPFinancialData::sortKeyIsMainKey()
 
   Since the member \a key is both the data point key coordinate and the data ordering parameter,
   this method returns true.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPFinancialData::mainKey() const
 
   Returns the \a key member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn double QCPFinancialData::mainValue() const
 
   Returns the \a open member of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /*! \fn QCPRange QCPFinancialData::valueRange() const
 
   Returns a QCPRange spanning from the \a low to the \a high value of this data point.
 
   For a general explanation of what this method is good for in the context of the data container,
   see the documentation of \ref QCPDataContainer.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Constructs a data point with key and all values set to zero.
 */
 QCPFinancialData::QCPFinancialData() : key(0), open(0), high(0), low(0), close(0)
 {
 }
 
 /*!
   Constructs a data point with the specified \a key and OHLC values.
 */
 QCPFinancialData::QCPFinancialData(double key, double open, double high, double low, double close)
     : key(key), open(open), high(high), low(low), close(close)
 {
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPFinancial
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPFinancial
   \brief A plottable representing a financial stock chart
 
   \image html QCPFinancial.png
 
   This plottable represents time series data binned to certain intervals, mainly used for stock
   charts. The two common representations OHLC (Open-High-Low-Close) bars and Candlesticks can be
   set via \ref setChartStyle.
 
   The data is passed via \ref setData as a set of open/high/low/close values at certain keys
   (typically times). This means the data must be already binned appropriately. If data is only
   available as a series of values (e.g. \a price against \a time), you can use the static
   convenience function \ref timeSeriesToOhlc to generate binned OHLC-data which can then be passed
   to \ref setData.
 
   The width of the OHLC bars/candlesticks can be controlled with \ref setWidth and \ref
   setWidthType. A typical choice is to set the width type to \ref wtPlotCoords (the default) and
   the width to (or slightly less than) one time bin interval width.
 
   \section qcpfinancial-appearance Changing the appearance
 
   Charts can be either single- or two-colored (\ref setTwoColored). If set to be single-colored,
   lines are drawn with the plottable's pen (\ref setPen) and fills with the brush (\ref setBrush).
 
   If set to two-colored, positive changes of the value during an interval (\a close >= \a open) are
   represented with a different pen and brush than negative changes (\a close < \a open). These can
   be configured with \ref setPenPositive, \ref setPenNegative, \ref setBrushPositive, and \ref
   setBrushNegative. In two-colored mode, the normal plottable pen/brush is ignored. Upon selection
   however, the normal selected pen/brush (provided by the \ref selectionDecorator) is used,
   irrespective of whether the chart is single- or two-colored.
 
   \section qcpfinancial-usage Usage
 
   Like all data representing objects in QCustomPlot, the QCPFinancial is a plottable
   (QCPAbstractPlottable). So the plottable-interface of QCustomPlot applies
   (QCustomPlot::plottable, QCustomPlot::removePlottable, etc.)
 
   Usually, you first create an instance:
 
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpfinancial-creation-1
   which registers it with the QCustomPlot instance of the passed axes. Note that this QCustomPlot
   instance takes ownership of the plottable, so do not delete it manually but use
   QCustomPlot::removePlottable() instead. The newly created plottable can be modified, e.g.:
 
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpfinancial-creation-2
   Here we have used the static helper method \ref timeSeriesToOhlc, to turn a time-price data
   series into a 24-hour binned open-high-low-close data series as QCPFinancial uses.
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QCPFinancialDataContainer *QCPFinancial::data() const
 
   Returns a pointer to the internal data storage of type \ref QCPFinancialDataContainer. You may
   use it to directly manipulate the data, which may be more convenient and faster than using the
   regular \ref setData or \ref addData methods, in certain situations.
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs a financial chart which uses \a keyAxis as its key axis ("x") and \a valueAxis as its value
   axis ("y"). \a keyAxis and \a valueAxis must reside in the same QCustomPlot instance and not have
   the same orientation. If either of these restrictions is violated, a corresponding message is
   printed to the debug output (qDebug), the construction is not aborted, though.
 
   The created QCPFinancial is automatically registered with the QCustomPlot instance inferred from \a
   keyAxis. This QCustomPlot instance takes ownership of the QCPFinancial, so do not delete it manually
   but use QCustomPlot::removePlottable() instead.
 */
 QCPFinancial::QCPFinancial(QCPAxis *keyAxis, QCPAxis *valueAxis)
     : QCPAbstractPlottable1D<QCPFinancialData>(keyAxis, valueAxis), mChartStyle(csCandlestick), mWidth(0.5),
       mWidthType(wtPlotCoords), mTwoColored(true), mBrushPositive(QBrush(QColor(50, 160, 0))),
       mBrushNegative(QBrush(QColor(180, 0, 15))), mPenPositive(QPen(QColor(40, 150, 0))),
       mPenNegative(QPen(QColor(170, 5, 5)))
 {
     mSelectionDecorator->setBrush(QBrush(QColor(160, 160, 255)));
 }
 
 QCPFinancial::~QCPFinancial()
 {
 }
 
 /*! \overload
 
   Replaces the current data container with the provided \a data container.
 
   Since a QSharedPointer is used, multiple QCPFinancials may share the same data container safely.
   Modifying the data in the container will then affect all financials that share the container.
   Sharing can be achieved by simply exchanging the data containers wrapped in shared pointers:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpfinancial-datasharing-1
 
   If you do not wish to share containers, but create a copy from an existing container, rather use
   the \ref QCPDataContainer<DataType>::set method on the financial's data container directly:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcpfinancial-datasharing-2
 
   \see addData, timeSeriesToOhlc
 */
 void QCPFinancial::setData(QSharedPointer<QCPFinancialDataContainer> data)
 {
     mDataContainer = data;
 }
 
 /*! \overload
 
   Replaces the current data with the provided points in \a keys, \a open, \a high, \a low and \a
   close. The provided vectors should have equal length. Else, the number of added points will be
   the size of the smallest vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   \see addData, timeSeriesToOhlc
 */
 void QCPFinancial::setData(const QVector<double> &keys, const QVector<double> &open, const QVector<double> &high,
                            const QVector<double> &low, const QVector<double> &close, bool alreadySorted)
 {
     mDataContainer->clear();
     addData(keys, open, high, low, close, alreadySorted);
 }
 
 /*!
   Sets which representation style shall be used to display the OHLC data.
 */
 void QCPFinancial::setChartStyle(QCPFinancial::ChartStyle style)
 {
     mChartStyle = style;
 }
 
 /*!
   Sets the width of the individual bars/candlesticks to \a width in plot key coordinates.
 
   A typical choice is to set it to (or slightly less than) one bin interval width.
 */
 void QCPFinancial::setWidth(double width)
 {
     mWidth = width;
 }
 
 /*!
   Sets how the width of the financial bars is defined. See the documentation of \ref WidthType for
   an explanation of the possible values for \a widthType.
 
   The default value is \ref wtPlotCoords.
 
   \see setWidth
 */
 void QCPFinancial::setWidthType(QCPFinancial::WidthType widthType)
 {
     mWidthType = widthType;
 }
 
 /*!
   Sets whether this chart shall contrast positive from negative trends per data point by using two
   separate colors to draw the respective bars/candlesticks.
 
   If \a twoColored is false, the normal plottable's pen and brush are used (\ref setPen, \ref
   setBrush).
 
   \see setPenPositive, setPenNegative, setBrushPositive, setBrushNegative
 */
 void QCPFinancial::setTwoColored(bool twoColored)
 {
     mTwoColored = twoColored;
 }
 
 /*!
   If \ref setTwoColored is set to true, this function controls the brush that is used to draw fills
   of data points with a positive trend (i.e. bars/candlesticks with close >= open).
 
   If \a twoColored is false, the normal plottable's pen and brush are used (\ref setPen, \ref
   setBrush).
 
   \see setBrushNegative, setPenPositive, setPenNegative
 */
 void QCPFinancial::setBrushPositive(const QBrush &brush)
 {
     mBrushPositive = brush;
 }
 
 /*!
   If \ref setTwoColored is set to true, this function controls the brush that is used to draw fills
   of data points with a negative trend (i.e. bars/candlesticks with close < open).
 
   If \a twoColored is false, the normal plottable's pen and brush are used (\ref setPen, \ref
   setBrush).
 
   \see setBrushPositive, setPenNegative, setPenPositive
 */
 void QCPFinancial::setBrushNegative(const QBrush &brush)
 {
     mBrushNegative = brush;
 }
 
 /*!
   If \ref setTwoColored is set to true, this function controls the pen that is used to draw
   outlines of data points with a positive trend (i.e. bars/candlesticks with close >= open).
 
   If \a twoColored is false, the normal plottable's pen and brush are used (\ref setPen, \ref
   setBrush).
 
   \see setPenNegative, setBrushPositive, setBrushNegative
 */
 void QCPFinancial::setPenPositive(const QPen &pen)
 {
     mPenPositive = pen;
 }
 
 /*!
   If \ref setTwoColored is set to true, this function controls the pen that is used to draw
   outlines of data points with a negative trend (i.e. bars/candlesticks with close < open).
 
   If \a twoColored is false, the normal plottable's pen and brush are used (\ref setPen, \ref
   setBrush).
 
   \see setPenPositive, setBrushNegative, setBrushPositive
 */
 void QCPFinancial::setPenNegative(const QPen &pen)
 {
     mPenNegative = pen;
 }
 
 /*! \overload
 
   Adds the provided points in \a keys, \a open, \a high, \a low and \a close to the current data.
   The provided vectors should have equal length. Else, the number of added points will be the size
   of the smallest vector.
 
   If you can guarantee that the passed data points are sorted by \a keys in ascending order, you
   can set \a alreadySorted to true, to improve performance by saving a sorting run.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 
   \see timeSeriesToOhlc
 */
 void QCPFinancial::addData(const QVector<double> &keys, const QVector<double> &open, const QVector<double> &high,
                            const QVector<double> &low, const QVector<double> &close, bool alreadySorted)
 {
     if (keys.size() != open.size() || open.size() != high.size() || high.size() != low.size() ||
         low.size() != close.size() || close.size() != keys.size())
         qDebug() << Q_FUNC_INFO << "keys, open, high, low, close have different sizes:" << keys.size() << open.size()
                  << high.size() << low.size() << close.size();
     const int n = qMin(keys.size(), qMin(open.size(), qMin(high.size(), qMin(low.size(), close.size()))));
     QVector<QCPFinancialData> tempData(n);
     QVector<QCPFinancialData>::iterator it          = tempData.begin();
     const QVector<QCPFinancialData>::iterator itEnd = tempData.end();
     int i                                           = 0;
     while (it != itEnd)
     {
         it->key   = keys[i];
         it->open  = open[i];
         it->high  = high[i];
         it->low   = low[i];
         it->close = close[i];
         ++it;
         ++i;
     }
     mDataContainer->add(tempData, alreadySorted); // don't modify tempData beyond this to prevent copy on write
 }
 
 /*! \overload
 
   Adds the provided data point as \a key, \a open, \a high, \a low and \a close to the current
   data.
 
   Alternatively, you can also access and modify the data directly via the \ref data method, which
   returns a pointer to the internal data container.
 
   \see timeSeriesToOhlc
 */
 void QCPFinancial::addData(double key, double open, double high, double low, double close)
 {
     mDataContainer->add(QCPFinancialData(key, open, high, low, close));
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::selectTestRect
 */
 QCPDataSelection QCPFinancial::selectTestRect(const QRectF &rect, bool onlySelectable) const
 {
     QCPDataSelection result;
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return result;
     if (!mKeyAxis || !mValueAxis)
         return result;
 
     QCPFinancialDataContainer::const_iterator visibleBegin, visibleEnd;
     getVisibleDataBounds(visibleBegin, visibleEnd);
 
     for (QCPFinancialDataContainer::const_iterator it = visibleBegin; it != visibleEnd; ++it)
     {
         if (rect.intersects(selectionHitBox(it)))
             result.addDataRange(QCPDataRange(it - mDataContainer->constBegin(), it - mDataContainer->constBegin() + 1),
                                 false);
     }
     result.simplify();
     return result;
 }
 
 /* inherits documentation from base class */
 double QCPFinancial::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     if (mKeyAxis.data()->axisRect()->rect().contains(pos.toPoint()))
     {
         // get visible data range:
         QCPFinancialDataContainer::const_iterator visibleBegin, visibleEnd;
         QCPFinancialDataContainer::const_iterator closestDataPoint = mDataContainer->constEnd();
         getVisibleDataBounds(visibleBegin, visibleEnd);
         // perform select test according to configured style:
         double result = -1;
         switch (mChartStyle)
         {
             case QCPFinancial::csOhlc:
                 result = ohlcSelectTest(pos, visibleBegin, visibleEnd, closestDataPoint);
                 break;
             case QCPFinancial::csCandlestick:
                 result = candlestickSelectTest(pos, visibleBegin, visibleEnd, closestDataPoint);
                 break;
         }
         if (details)
         {
             int pointIndex = closestDataPoint - mDataContainer->constBegin();
             details->setValue(QCPDataSelection(QCPDataRange(pointIndex, pointIndex + 1)));
         }
         return result;
     }
 
     return -1;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPFinancial::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const
 {
     QCPRange range = mDataContainer->keyRange(foundRange, inSignDomain);
     // determine exact range by including width of bars/flags:
     if (foundRange)
     {
         if (inSignDomain != QCP::sdPositive || range.lower - mWidth * 0.5 > 0)
             range.lower -= mWidth * 0.5;
         if (inSignDomain != QCP::sdNegative || range.upper + mWidth * 0.5 < 0)
             range.upper += mWidth * 0.5;
     }
     return range;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPFinancial::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain, const QCPRange &inKeyRange) const
 {
     return mDataContainer->valueRange(foundRange, inSignDomain, inKeyRange);
 }
 
 /*!
   A convenience function that converts time series data (\a value against \a time) to OHLC binned
   data points. The return value can then be passed on to \ref QCPFinancialDataContainer::set(const
   QCPFinancialDataContainer&).
 
   The size of the bins can be controlled with \a timeBinSize in the same units as \a time is given.
   For example, if the unit of \a time is seconds and single OHLC/Candlesticks should span an hour
   each, set \a timeBinSize to 3600.
 
   \a timeBinOffset allows to control precisely at what \a time coordinate a bin should start. The
   value passed as \a timeBinOffset doesn't need to be in the range encompassed by the \a time keys.
   It merely defines the mathematical offset/phase of the bins that will be used to process the
   data.
 */
 QCPFinancialDataContainer QCPFinancial::timeSeriesToOhlc(const QVector<double> &time, const QVector<double> &value,
                                                          double timeBinSize, double timeBinOffset)
 {
     QCPFinancialDataContainer data;
     int count = qMin(time.size(), value.size());
     if (count == 0)
         return QCPFinancialDataContainer();
 
     QCPFinancialData currentBinData(0, value.first(), value.first(), value.first(), value.first());
     int currentBinIndex = qFloor((time.first() - timeBinOffset) / timeBinSize + 0.5);
     for (int i = 0; i < count; ++i)
     {
         int index = qFloor((time.at(i) - timeBinOffset) / timeBinSize + 0.5);
         if (currentBinIndex == index) // data point still in current bin, extend high/low:
         {
             if (value.at(i) < currentBinData.low)
                 currentBinData.low = value.at(i);
             if (value.at(i) > currentBinData.high)
                 currentBinData.high = value.at(i);
             if (i == count - 1) // last data point is in current bin, finalize bin:
             {
                 currentBinData.close = value.at(i);
                 currentBinData.key   = timeBinOffset + (index)*timeBinSize;
                 data.add(currentBinData);
             }
         }
         else // data point not anymore in current bin, set close of old and open of new bin, and add old to map:
         {
             // finalize current bin:
             currentBinData.close = value.at(i - 1);
             currentBinData.key   = timeBinOffset + (index - 1) * timeBinSize;
             data.add(currentBinData);
             // start next bin:
             currentBinIndex     = index;
             currentBinData.open = value.at(i);
             currentBinData.high = value.at(i);
             currentBinData.low  = value.at(i);
         }
     }
 
     return data;
 }
 
 /* inherits documentation from base class */
 void QCPFinancial::draw(QCPPainter *painter)
 {
     // get visible data range:
     QCPFinancialDataContainer::const_iterator visibleBegin, visibleEnd;
     getVisibleDataBounds(visibleBegin, visibleEnd);
 
     // loop over and draw segments of unselected/selected data:
     QList<QCPDataRange> selectedSegments, unselectedSegments, allSegments;
     getDataSegments(selectedSegments, unselectedSegments);
     allSegments << unselectedSegments << selectedSegments;
     for (int i = 0; i < allSegments.size(); ++i)
     {
         bool isSelectedSegment                          = i >= unselectedSegments.size();
         QCPFinancialDataContainer::const_iterator begin = visibleBegin;
         QCPFinancialDataContainer::const_iterator end   = visibleEnd;
         mDataContainer->limitIteratorsToDataRange(begin, end, allSegments.at(i));
         if (begin == end)
             continue;
 
         // draw data segment according to configured style:
         switch (mChartStyle)
         {
             case QCPFinancial::csOhlc:
                 drawOhlcPlot(painter, begin, end, isSelectedSegment);
                 break;
             case QCPFinancial::csCandlestick:
                 drawCandlestickPlot(painter, begin, end, isSelectedSegment);
                 break;
         }
     }
 
     // draw other selection decoration that isn't just line/scatter pens and brushes:
     if (mSelectionDecorator)
         mSelectionDecorator->drawDecoration(painter, selection());
 }
 
 /* inherits documentation from base class */
 void QCPFinancial::drawLegendIcon(QCPPainter *painter, const QRectF &rect) const
 {
     painter->setAntialiasing(false); // legend icon especially of csCandlestick looks better without antialiasing
     if (mChartStyle == csOhlc)
     {
         if (mTwoColored)
         {
             // draw upper left half icon with positive color:
             painter->setBrush(mBrushPositive);
             painter->setPen(mPenPositive);
             painter->setClipRegion(QRegion(QPolygon() << rect.bottomLeft().toPoint() << rect.topRight().toPoint()
                                                       << rect.topLeft().toPoint()));
             painter->drawLine(
                 QLineF(0, rect.height() * 0.5, rect.width(), rect.height() * 0.5).translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.2, rect.height() * 0.3, rect.width() * 0.2, rect.height() * 0.5)
                                   .translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.8, rect.height() * 0.5, rect.width() * 0.8, rect.height() * 0.7)
                                   .translated(rect.topLeft()));
             // draw bottom right half icon with negative color:
             painter->setBrush(mBrushNegative);
             painter->setPen(mPenNegative);
             painter->setClipRegion(QRegion(QPolygon() << rect.bottomLeft().toPoint() << rect.topRight().toPoint()
                                                       << rect.bottomRight().toPoint()));
             painter->drawLine(
                 QLineF(0, rect.height() * 0.5, rect.width(), rect.height() * 0.5).translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.2, rect.height() * 0.3, rect.width() * 0.2, rect.height() * 0.5)
                                   .translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.8, rect.height() * 0.5, rect.width() * 0.8, rect.height() * 0.7)
                                   .translated(rect.topLeft()));
         }
         else
         {
             painter->setBrush(mBrush);
             painter->setPen(mPen);
             painter->drawLine(
                 QLineF(0, rect.height() * 0.5, rect.width(), rect.height() * 0.5).translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.2, rect.height() * 0.3, rect.width() * 0.2, rect.height() * 0.5)
                                   .translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.8, rect.height() * 0.5, rect.width() * 0.8, rect.height() * 0.7)
                                   .translated(rect.topLeft()));
         }
     }
     else if (mChartStyle == csCandlestick)
     {
         if (mTwoColored)
         {
             // draw upper left half icon with positive color:
             painter->setBrush(mBrushPositive);
             painter->setPen(mPenPositive);
             painter->setClipRegion(QRegion(QPolygon() << rect.bottomLeft().toPoint() << rect.topRight().toPoint()
                                                       << rect.topLeft().toPoint()));
             painter->drawLine(
                 QLineF(0, rect.height() * 0.5, rect.width() * 0.25, rect.height() * 0.5).translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.75, rect.height() * 0.5, rect.width(), rect.height() * 0.5)
                                   .translated(rect.topLeft()));
             painter->drawRect(QRectF(rect.width() * 0.25, rect.height() * 0.25, rect.width() * 0.5, rect.height() * 0.5)
                                   .translated(rect.topLeft()));
             // draw bottom right half icon with negative color:
             painter->setBrush(mBrushNegative);
             painter->setPen(mPenNegative);
             painter->setClipRegion(QRegion(QPolygon() << rect.bottomLeft().toPoint() << rect.topRight().toPoint()
                                                       << rect.bottomRight().toPoint()));
             painter->drawLine(
                 QLineF(0, rect.height() * 0.5, rect.width() * 0.25, rect.height() * 0.5).translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.75, rect.height() * 0.5, rect.width(), rect.height() * 0.5)
                                   .translated(rect.topLeft()));
             painter->drawRect(QRectF(rect.width() * 0.25, rect.height() * 0.25, rect.width() * 0.5, rect.height() * 0.5)
                                   .translated(rect.topLeft()));
         }
         else
         {
             painter->setBrush(mBrush);
             painter->setPen(mPen);
             painter->drawLine(
                 QLineF(0, rect.height() * 0.5, rect.width() * 0.25, rect.height() * 0.5).translated(rect.topLeft()));
             painter->drawLine(QLineF(rect.width() * 0.75, rect.height() * 0.5, rect.width(), rect.height() * 0.5)
                                   .translated(rect.topLeft()));
             painter->drawRect(QRectF(rect.width() * 0.25, rect.height() * 0.25, rect.width() * 0.5, rect.height() * 0.5)
                                   .translated(rect.topLeft()));
         }
     }
 }
 
 /*! \internal
 
   Draws the data from \a begin to \a end-1 as OHLC bars with the provided \a painter.
 
   This method is a helper function for \ref draw. It is used when the chart style is \ref csOhlc.
 */
 void QCPFinancial::drawOhlcPlot(QCPPainter *painter, const QCPFinancialDataContainer::const_iterator &begin,
                                 const QCPFinancialDataContainer::const_iterator &end, bool isSelected)
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             if (isSelected && mSelectionDecorator)
                 mSelectionDecorator->applyPen(painter);
             else if (mTwoColored)
                 painter->setPen(it->close >= it->open ? mPenPositive : mPenNegative);
             else
                 painter->setPen(mPen);
             double keyPixel   = keyAxis->coordToPixel(it->key);
             double openPixel  = valueAxis->coordToPixel(it->open);
             double closePixel = valueAxis->coordToPixel(it->close);
             // draw backbone:
             painter->drawLine(QPointF(keyPixel, valueAxis->coordToPixel(it->high)),
                               QPointF(keyPixel, valueAxis->coordToPixel(it->low)));
             // draw open:
             double pixelWidth =
                 getPixelWidth(it->key, keyPixel); // sign of this makes sure open/close are on correct sides
             painter->drawLine(QPointF(keyPixel - pixelWidth, openPixel), QPointF(keyPixel, openPixel));
             // draw close:
             painter->drawLine(QPointF(keyPixel, closePixel), QPointF(keyPixel + pixelWidth, closePixel));
         }
     }
     else
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             if (isSelected && mSelectionDecorator)
                 mSelectionDecorator->applyPen(painter);
             else if (mTwoColored)
                 painter->setPen(it->close >= it->open ? mPenPositive : mPenNegative);
             else
                 painter->setPen(mPen);
             double keyPixel   = keyAxis->coordToPixel(it->key);
             double openPixel  = valueAxis->coordToPixel(it->open);
             double closePixel = valueAxis->coordToPixel(it->close);
             // draw backbone:
             painter->drawLine(QPointF(valueAxis->coordToPixel(it->high), keyPixel),
                               QPointF(valueAxis->coordToPixel(it->low), keyPixel));
             // draw open:
             double pixelWidth =
                 getPixelWidth(it->key, keyPixel); // sign of this makes sure open/close are on correct sides
             painter->drawLine(QPointF(openPixel, keyPixel - pixelWidth), QPointF(openPixel, keyPixel));
             // draw close:
             painter->drawLine(QPointF(closePixel, keyPixel), QPointF(closePixel, keyPixel + pixelWidth));
         }
     }
 }
 
 /*! \internal
 
   Draws the data from \a begin to \a end-1 as Candlesticks with the provided \a painter.
 
   This method is a helper function for \ref draw. It is used when the chart style is \ref csCandlestick.
 */
 void QCPFinancial::drawCandlestickPlot(QCPPainter *painter, const QCPFinancialDataContainer::const_iterator &begin,
                                        const QCPFinancialDataContainer::const_iterator &end, bool isSelected)
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
 
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             if (isSelected && mSelectionDecorator)
             {
                 mSelectionDecorator->applyPen(painter);
                 mSelectionDecorator->applyBrush(painter);
             }
             else if (mTwoColored)
             {
                 painter->setPen(it->close >= it->open ? mPenPositive : mPenNegative);
                 painter->setBrush(it->close >= it->open ? mBrushPositive : mBrushNegative);
             }
             else
             {
                 painter->setPen(mPen);
                 painter->setBrush(mBrush);
             }
             double keyPixel   = keyAxis->coordToPixel(it->key);
             double openPixel  = valueAxis->coordToPixel(it->open);
             double closePixel = valueAxis->coordToPixel(it->close);
             // draw high:
             painter->drawLine(QPointF(keyPixel, valueAxis->coordToPixel(it->high)),
                               QPointF(keyPixel, valueAxis->coordToPixel(qMax(it->open, it->close))));
             // draw low:
             painter->drawLine(QPointF(keyPixel, valueAxis->coordToPixel(it->low)),
                               QPointF(keyPixel, valueAxis->coordToPixel(qMin(it->open, it->close))));
             // draw open-close box:
             double pixelWidth = getPixelWidth(it->key, keyPixel);
             painter->drawRect(
                 QRectF(QPointF(keyPixel - pixelWidth, closePixel), QPointF(keyPixel + pixelWidth, openPixel)));
         }
     }
     else // keyAxis->orientation() == Qt::Vertical
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             if (isSelected && mSelectionDecorator)
             {
                 mSelectionDecorator->applyPen(painter);
                 mSelectionDecorator->applyBrush(painter);
             }
             else if (mTwoColored)
             {
                 painter->setPen(it->close >= it->open ? mPenPositive : mPenNegative);
                 painter->setBrush(it->close >= it->open ? mBrushPositive : mBrushNegative);
             }
             else
             {
                 painter->setPen(mPen);
                 painter->setBrush(mBrush);
             }
             double keyPixel   = keyAxis->coordToPixel(it->key);
             double openPixel  = valueAxis->coordToPixel(it->open);
             double closePixel = valueAxis->coordToPixel(it->close);
             // draw high:
             painter->drawLine(QPointF(valueAxis->coordToPixel(it->high), keyPixel),
                               QPointF(valueAxis->coordToPixel(qMax(it->open, it->close)), keyPixel));
             // draw low:
             painter->drawLine(QPointF(valueAxis->coordToPixel(it->low), keyPixel),
                               QPointF(valueAxis->coordToPixel(qMin(it->open, it->close)), keyPixel));
             // draw open-close box:
             double pixelWidth = getPixelWidth(it->key, keyPixel);
             painter->drawRect(
                 QRectF(QPointF(closePixel, keyPixel - pixelWidth), QPointF(openPixel, keyPixel + pixelWidth)));
         }
     }
 }
 
 /*! \internal
 
   This function is used to determine the width of the bar at coordinate \a key, according to the
   specified width (\ref setWidth) and width type (\ref setWidthType). Provide the pixel position of
   \a key in \a keyPixel (because usually this was already calculated via \ref QCPAxis::coordToPixel
   when this function is called).
 
   It returns the number of pixels the bar extends to higher keys, relative to the \a key
   coordinate. So with a non-reversed horizontal axis, the return value is positive. With a reversed
   horizontal axis, the return value is negative. This is important so the open/close flags on the
   \ref csOhlc bar are drawn to the correct side.
 */
 double QCPFinancial::getPixelWidth(double key, double keyPixel) const
 {
     double result = 0;
     switch (mWidthType)
     {
         case wtAbsolute:
         {
             if (mKeyAxis)
                 result = mWidth * 0.5 * mKeyAxis.data()->pixelOrientation();
             break;
         }
         case wtAxisRectRatio:
         {
             if (mKeyAxis && mKeyAxis.data()->axisRect())
             {
                 if (mKeyAxis.data()->orientation() == Qt::Horizontal)
                     result = mKeyAxis.data()->axisRect()->width() * mWidth * 0.5 * mKeyAxis.data()->pixelOrientation();
                 else
                     result = mKeyAxis.data()->axisRect()->height() * mWidth * 0.5 * mKeyAxis.data()->pixelOrientation();
             }
             else
                 qDebug() << Q_FUNC_INFO << "No key axis or axis rect defined";
             break;
         }
         case wtPlotCoords:
         {
             if (mKeyAxis)
                 result = mKeyAxis.data()->coordToPixel(key + mWidth * 0.5) - keyPixel;
             else
                 qDebug() << Q_FUNC_INFO << "No key axis defined";
             break;
         }
     }
     return result;
 }
 
 /*! \internal
 
   This method is a helper function for \ref selectTest. It is used to test for selection when the
   chart style is \ref csOhlc. It only tests against the data points between \a begin and \a end.
 
   Like \ref selectTest, this method returns the shortest distance of \a pos to the graphical
   representation of the plottable, and \a closestDataPoint will point to the respective data point.
 */
 double QCPFinancial::ohlcSelectTest(const QPointF &pos, const QCPFinancialDataContainer::const_iterator &begin,
                                     const QCPFinancialDataContainer::const_iterator &end,
                                     QCPFinancialDataContainer::const_iterator &closestDataPoint) const
 {
     closestDataPoint   = mDataContainer->constEnd();
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return -1;
     }
 
     double minDistSqr = std::numeric_limits<double>::max();
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             double keyPixel = keyAxis->coordToPixel(it->key);
             // calculate distance to backbone:
             double currentDistSqr =
                 QCPVector2D(pos).distanceSquaredToLine(QCPVector2D(keyPixel, valueAxis->coordToPixel(it->high)),
                                                        QCPVector2D(keyPixel, valueAxis->coordToPixel(it->low)));
             if (currentDistSqr < minDistSqr)
             {
                 minDistSqr       = currentDistSqr;
                 closestDataPoint = it;
             }
         }
     }
     else // keyAxis->orientation() == Qt::Vertical
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             double keyPixel = keyAxis->coordToPixel(it->key);
             // calculate distance to backbone:
             double currentDistSqr =
                 QCPVector2D(pos).distanceSquaredToLine(QCPVector2D(valueAxis->coordToPixel(it->high), keyPixel),
                                                        QCPVector2D(valueAxis->coordToPixel(it->low), keyPixel));
             if (currentDistSqr < minDistSqr)
             {
                 minDistSqr       = currentDistSqr;
                 closestDataPoint = it;
             }
         }
     }
     return qSqrt(minDistSqr);
 }
 
 /*! \internal
 
   This method is a helper function for \ref selectTest. It is used to test for selection when the
   chart style is \ref csCandlestick. It only tests against the data points between \a begin and \a
   end.
 
   Like \ref selectTest, this method returns the shortest distance of \a pos to the graphical
   representation of the plottable, and \a closestDataPoint will point to the respective data point.
 */
 double QCPFinancial::candlestickSelectTest(const QPointF &pos, const QCPFinancialDataContainer::const_iterator &begin,
                                            const QCPFinancialDataContainer::const_iterator &end,
                                            QCPFinancialDataContainer::const_iterator &closestDataPoint) const
 {
     closestDataPoint   = mDataContainer->constEnd();
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return -1;
     }
 
     double minDistSqr = std::numeric_limits<double>::max();
     if (keyAxis->orientation() == Qt::Horizontal)
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             double currentDistSqr;
             // determine whether pos is in open-close-box:
             QCPRange boxKeyRange(it->key - mWidth * 0.5, it->key + mWidth * 0.5);
             QCPRange boxValueRange(it->close, it->open);
             double posKey, posValue;
             pixelsToCoords(pos, posKey, posValue);
             if (boxKeyRange.contains(posKey) && boxValueRange.contains(posValue)) // is in open-close-box
             {
                 currentDistSqr = mParentPlot->selectionTolerance() * 0.99 * mParentPlot->selectionTolerance() * 0.99;
             }
             else
             {
                 // calculate distance to high/low lines:
                 double keyPixel        = keyAxis->coordToPixel(it->key);
                 double highLineDistSqr = QCPVector2D(pos).distanceSquaredToLine(
                     QCPVector2D(keyPixel, valueAxis->coordToPixel(it->high)),
                     QCPVector2D(keyPixel, valueAxis->coordToPixel(qMax(it->open, it->close))));
                 double lowLineDistSqr = QCPVector2D(pos).distanceSquaredToLine(
                     QCPVector2D(keyPixel, valueAxis->coordToPixel(it->low)),
                     QCPVector2D(keyPixel, valueAxis->coordToPixel(qMin(it->open, it->close))));
                 currentDistSqr = qMin(highLineDistSqr, lowLineDistSqr);
             }
             if (currentDistSqr < minDistSqr)
             {
                 minDistSqr       = currentDistSqr;
                 closestDataPoint = it;
             }
         }
     }
     else // keyAxis->orientation() == Qt::Vertical
     {
         for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
         {
             double currentDistSqr;
             // determine whether pos is in open-close-box:
             QCPRange boxKeyRange(it->key - mWidth * 0.5, it->key + mWidth * 0.5);
             QCPRange boxValueRange(it->close, it->open);
             double posKey, posValue;
             pixelsToCoords(pos, posKey, posValue);
             if (boxKeyRange.contains(posKey) && boxValueRange.contains(posValue)) // is in open-close-box
             {
                 currentDistSqr = mParentPlot->selectionTolerance() * 0.99 * mParentPlot->selectionTolerance() * 0.99;
             }
             else
             {
                 // calculate distance to high/low lines:
                 double keyPixel        = keyAxis->coordToPixel(it->key);
                 double highLineDistSqr = QCPVector2D(pos).distanceSquaredToLine(
                     QCPVector2D(valueAxis->coordToPixel(it->high), keyPixel),
                     QCPVector2D(valueAxis->coordToPixel(qMax(it->open, it->close)), keyPixel));
                 double lowLineDistSqr = QCPVector2D(pos).distanceSquaredToLine(
                     QCPVector2D(valueAxis->coordToPixel(it->low), keyPixel),
                     QCPVector2D(valueAxis->coordToPixel(qMin(it->open, it->close)), keyPixel));
                 currentDistSqr = qMin(highLineDistSqr, lowLineDistSqr);
             }
             if (currentDistSqr < minDistSqr)
             {
                 minDistSqr       = currentDistSqr;
                 closestDataPoint = it;
             }
         }
     }
     return qSqrt(minDistSqr);
 }
 
 /*! \internal
 
   called by the drawing methods to determine which data (key) range is visible at the current key
   axis range setting, so only that needs to be processed.
 
   \a begin returns an iterator to the lowest data point that needs to be taken into account when
   plotting. Note that in order to get a clean plot all the way to the edge of the axis rect, \a
   begin may still be just outside the visible range.
 
   \a end returns the iterator just above the highest data point that needs to be taken into
   account. Same as before, \a end may also lie just outside of the visible range
 
   if the plottable contains no data, both \a begin and \a end point to \c constEnd.
 */
 void QCPFinancial::getVisibleDataBounds(QCPFinancialDataContainer::const_iterator &begin,
                                         QCPFinancialDataContainer::const_iterator &end) const
 {
     if (!mKeyAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key axis";
         begin = mDataContainer->constEnd();
         end   = mDataContainer->constEnd();
         return;
     }
     begin = mDataContainer->findBegin(
         mKeyAxis.data()->range().lower -
         mWidth * 0.5); // subtract half width of ohlc/candlestick to include partially visible data points
     end = mDataContainer->findEnd(
         mKeyAxis.data()->range().upper +
         mWidth * 0.5); // add half width of ohlc/candlestick to include partially visible data points
 }
 
 /*!  \internal
 
   Returns the hit box in pixel coordinates that will be used for data selection with the selection
   rect (\ref selectTestRect), of the data point given by \a it.
 */
 QRectF QCPFinancial::selectionHitBox(QCPFinancialDataContainer::const_iterator it) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return QRectF();
     }
 
     double keyPixel       = keyAxis->coordToPixel(it->key);
     double highPixel      = valueAxis->coordToPixel(it->high);
     double lowPixel       = valueAxis->coordToPixel(it->low);
     double keyWidthPixels = keyPixel - keyAxis->coordToPixel(it->key - mWidth * 0.5);
     if (keyAxis->orientation() == Qt::Horizontal)
         return QRectF(keyPixel - keyWidthPixels, highPixel, keyWidthPixels * 2, lowPixel - highPixel).normalized();
     else
         return QRectF(highPixel, keyPixel - keyWidthPixels, lowPixel - highPixel, keyWidthPixels * 2).normalized();
 }
 /* end of 'src/plottables/plottable-financial.cpp' */
 
 /* including file 'src/plottables/plottable-errorbar.cpp', size 37210        */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPErrorBarsData
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPErrorBarsData
   \brief Holds the data of one single error bar for QCPErrorBars.
 
   The stored data is:
   \li \a errorMinus: how much the error bar extends towards negative coordinates from the data
   point position
   \li \a errorPlus: how much the error bar extends towards positive coordinates from the data point
   position
 
   The container for storing the error bar information is \ref QCPErrorBarsDataContainer. It is a
   typedef for <tt>QVector<\ref QCPErrorBarsData></tt>.
 
   \see QCPErrorBarsDataContainer
 */
 
 /*!
   Constructs an error bar with errors set to zero.
 */
 QCPErrorBarsData::QCPErrorBarsData() : errorMinus(0), errorPlus(0)
 {
 }
 
 /*!
   Constructs an error bar with equal \a error in both negative and positive direction.
 */
 QCPErrorBarsData::QCPErrorBarsData(double error) : errorMinus(error), errorPlus(error)
 {
 }
 
 /*!
   Constructs an error bar with negative and positive errors set to \a errorMinus and \a errorPlus,
   respectively.
 */
 QCPErrorBarsData::QCPErrorBarsData(double errorMinus, double errorPlus) : errorMinus(errorMinus), errorPlus(errorPlus)
 {
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPErrorBars
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPErrorBars
   \brief A plottable that adds a set of error bars to other plottables.
 
   \image html QCPErrorBars.png
 
   The \ref QCPErrorBars plottable can be attached to other one-dimensional plottables (e.g. \ref
   QCPGraph, \ref QCPCurve, \ref QCPBars, etc.) and equips them with error bars.
 
   Use \ref setDataPlottable to define for which plottable the \ref QCPErrorBars shall display the
   error bars. The orientation of the error bars can be controlled with \ref setErrorType.
 
   By using \ref setData, you can supply the actual error data, either as symmetric error or
   plus/minus asymmetric errors. \ref QCPErrorBars only stores the error data. The absolute
   key/value position of each error bar will be adopted from the configured data plottable. The
   error data of the \ref QCPErrorBars are associated one-to-one via their index to the data points
   of the data plottable. You can directly access and manipulate the error bar data via \ref data.
 
   Set either of the plus/minus errors to NaN (<tt>qQNaN()</tt> or
   <tt>std::numeric_limits<double>::quiet_NaN()</tt>) to not show the respective error bar on the data point at
   that index.
 
   \section qcperrorbars-appearance Changing the appearance
 
   The appearance of the error bars is defined by the pen (\ref setPen), and the width of the
   whiskers (\ref setWhiskerWidth). Further, the error bar backbones may leave a gap around the data
   point center to prevent that error bars are drawn too close to or even through scatter points.
   This gap size can be controlled via \ref setSymbolGap.
 */
 
 /* start of documentation of inline functions */
 
 /*! \fn QSharedPointer<QCPErrorBarsDataContainer> QCPErrorBars::data() const
 
   Returns a shared pointer to the internal data storage of type \ref QCPErrorBarsDataContainer. You
   may use it to directly manipulate the error values, which may be more convenient and faster than
   using the regular \ref setData methods.
 */
 
 /* end of documentation of inline functions */
 
 /*!
   Constructs an error bars plottable which uses \a keyAxis as its key axis ("x") and \a valueAxis as its value
   axis ("y"). \a keyAxis and \a valueAxis must reside in the same QCustomPlot instance and not have
   the same orientation. If either of these restrictions is violated, a corresponding message is
   printed to the debug output (qDebug), the construction is not aborted, though.
 
   It is also important that the \a keyAxis and \a valueAxis are the same for the error bars
   plottable and the data plottable that the error bars shall be drawn on (\ref setDataPlottable).
 
   The created \ref QCPErrorBars is automatically registered with the QCustomPlot instance inferred
   from \a keyAxis. This QCustomPlot instance takes ownership of the \ref QCPErrorBars, so do not
   delete it manually but use \ref QCustomPlot::removePlottable() instead.
 */
 QCPErrorBars::QCPErrorBars(QCPAxis *keyAxis, QCPAxis *valueAxis)
     : QCPAbstractPlottable(keyAxis, valueAxis), mDataContainer(new QVector<QCPErrorBarsData>), mErrorType(etValueError),
       mWhiskerWidth(9), mSymbolGap(10)
 {
     setPen(QPen(Qt::black, 0));
     setBrush(Qt::NoBrush);
 }
 
 QCPErrorBars::~QCPErrorBars()
 {
 }
 
 /*! \overload
 
   Replaces the current data container with the provided \a data container.
 
   Since a QSharedPointer is used, multiple \ref QCPErrorBars instances may share the same data
   container safely. Modifying the data in the container will then affect all \ref QCPErrorBars
   instances that share the container. Sharing can be achieved by simply exchanging the data
   containers wrapped in shared pointers:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcperrorbars-datasharing-1
 
   If you do not wish to share containers, but create a copy from an existing container, assign the
   data containers directly:
   \snippet documentation/doc-code-snippets/mainwindow.cpp qcperrorbars-datasharing-2
   (This uses different notation compared with other plottables, because the \ref QCPErrorBars
   uses a \c QVector<QCPErrorBarsData> as its data container, instead of a \ref QCPDataContainer.)
 
   \see addData
 */
 void QCPErrorBars::setData(QSharedPointer<QCPErrorBarsDataContainer> data)
 {
     mDataContainer = data;
 }
 
 /*! \overload
 
   Sets symmetrical error values as specified in \a error. The errors will be associated one-to-one
   by the data point index to the associated data plottable (\ref setDataPlottable).
 
   You can directly access and manipulate the error bar data via \ref data.
 
   \see addData
 */
 void QCPErrorBars::setData(const QVector<double> &error)
 {
     mDataContainer->clear();
     addData(error);
 }
 
 /*! \overload
 
   Sets asymmetrical errors as specified in \a errorMinus and \a errorPlus. The errors will be
   associated one-to-one by the data point index to the associated data plottable (\ref
   setDataPlottable).
 
   You can directly access and manipulate the error bar data via \ref data.
 
   \see addData
 */
 void QCPErrorBars::setData(const QVector<double> &errorMinus, const QVector<double> &errorPlus)
 {
     mDataContainer->clear();
     addData(errorMinus, errorPlus);
 }
 
 /*!
   Sets the data plottable to which the error bars will be applied. The error values specified e.g.
   via \ref setData will be associated one-to-one by the data point index to the data points of \a
   plottable. This means that the error bars will adopt the key/value coordinates of the data point
   with the same index.
 
   The passed \a plottable must be a one-dimensional plottable, i.e. it must implement the \ref
   QCPPlottableInterface1D. Further, it must not be a \ref QCPErrorBars instance itself. If either
   of these restrictions is violated, a corresponding qDebug output is generated, and the data
   plottable of this \ref QCPErrorBars instance is set to zero.
 
   For proper display, care must also be taken that the key and value axes of the \a plottable match
   those configured for this \ref QCPErrorBars instance.
 */
 void QCPErrorBars::setDataPlottable(QCPAbstractPlottable *plottable)
 {
     if (plottable && qobject_cast<QCPErrorBars *>(plottable))
     {
-        mDataPlottable = 0;
+        mDataPlottable = nullptr;
         qDebug() << Q_FUNC_INFO << "can't set another QCPErrorBars instance as data plottable";
         return;
     }
     if (plottable && !plottable->interface1D())
     {
-        mDataPlottable = 0;
+        mDataPlottable = nullptr;
         qDebug() << Q_FUNC_INFO << "passed plottable doesn't implement 1d interface, can't associate with QCPErrorBars";
         return;
     }
 
     mDataPlottable = plottable;
 }
 
 /*!
   Sets in which orientation the error bars shall appear on the data points. If your data needs both
   error dimensions, create two \ref QCPErrorBars with different \a type.
 */
 void QCPErrorBars::setErrorType(ErrorType type)
 {
     mErrorType = type;
 }
 
 /*!
   Sets the width of the whiskers (the short bars at the end of the actual error bar backbones) to
   \a pixels.
 */
 void QCPErrorBars::setWhiskerWidth(double pixels)
 {
     mWhiskerWidth = pixels;
 }
 
 /*!
   Sets the gap diameter around the data points that will be left out when drawing the error bar
   backbones. This gap prevents that error bars are drawn too close to or even through scatter
   points.
 */
 void QCPErrorBars::setSymbolGap(double pixels)
 {
     mSymbolGap = pixels;
 }
 
 /*! \overload
 
   Adds symmetrical error values as specified in \a error. The errors will be associated one-to-one
   by the data point index to the associated data plottable (\ref setDataPlottable).
 
   You can directly access and manipulate the error bar data via \ref data.
 
   \see setData
 */
 void QCPErrorBars::addData(const QVector<double> &error)
 {
     addData(error, error);
 }
 
 /*! \overload
 
   Adds asymmetrical errors as specified in \a errorMinus and \a errorPlus. The errors will be
   associated one-to-one by the data point index to the associated data plottable (\ref
   setDataPlottable).
 
   You can directly access and manipulate the error bar data via \ref data.
 
   \see setData
 */
 void QCPErrorBars::addData(const QVector<double> &errorMinus, const QVector<double> &errorPlus)
 {
     if (errorMinus.size() != errorPlus.size())
         qDebug() << Q_FUNC_INFO << "minus and plus error vectors have different sizes:" << errorMinus.size()
                  << errorPlus.size();
     const int n = qMin(errorMinus.size(), errorPlus.size());
     mDataContainer->reserve(n);
     for (int i = 0; i < n; ++i)
         mDataContainer->append(QCPErrorBarsData(errorMinus.at(i), errorPlus.at(i)));
 }
 
 /*! \overload
 
   Adds a single symmetrical error bar as specified in \a error. The errors will be associated
   one-to-one by the data point index to the associated data plottable (\ref setDataPlottable).
 
   You can directly access and manipulate the error bar data via \ref data.
 
   \see setData
 */
 void QCPErrorBars::addData(double error)
 {
     mDataContainer->append(QCPErrorBarsData(error));
 }
 
 /*! \overload
 
   Adds a single asymmetrical error bar as specified in \a errorMinus and \a errorPlus. The errors
   will be associated one-to-one by the data point index to the associated data plottable (\ref
   setDataPlottable).
 
   You can directly access and manipulate the error bar data via \ref data.
 
   \see setData
 */
 void QCPErrorBars::addData(double errorMinus, double errorPlus)
 {
     mDataContainer->append(QCPErrorBarsData(errorMinus, errorPlus));
 }
 
 /* inherits documentation from base class */
 int QCPErrorBars::dataCount() const
 {
     return mDataContainer->size();
 }
 
 /* inherits documentation from base class */
 double QCPErrorBars::dataMainKey(int index) const
 {
     if (mDataPlottable)
         return mDataPlottable->interface1D()->dataMainKey(index);
     else
         qDebug() << Q_FUNC_INFO << "no data plottable set";
     return 0;
 }
 
 /* inherits documentation from base class */
 double QCPErrorBars::dataSortKey(int index) const
 {
     if (mDataPlottable)
         return mDataPlottable->interface1D()->dataSortKey(index);
     else
         qDebug() << Q_FUNC_INFO << "no data plottable set";
     return 0;
 }
 
 /* inherits documentation from base class */
 double QCPErrorBars::dataMainValue(int index) const
 {
     if (mDataPlottable)
         return mDataPlottable->interface1D()->dataMainValue(index);
     else
         qDebug() << Q_FUNC_INFO << "no data plottable set";
     return 0;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPErrorBars::dataValueRange(int index) const
 {
     if (mDataPlottable)
     {
         const double value = mDataPlottable->interface1D()->dataMainValue(index);
         if (index >= 0 && index < mDataContainer->size() && mErrorType == etValueError)
             return QCPRange(value - mDataContainer->at(index).errorMinus, value + mDataContainer->at(index).errorPlus);
         else
             return QCPRange(value, value);
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "no data plottable set";
         return QCPRange();
     }
 }
 
 /* inherits documentation from base class */
 QPointF QCPErrorBars::dataPixelPosition(int index) const
 {
     if (mDataPlottable)
         return mDataPlottable->interface1D()->dataPixelPosition(index);
     else
         qDebug() << Q_FUNC_INFO << "no data plottable set";
     return QPointF();
 }
 
 /* inherits documentation from base class */
 bool QCPErrorBars::sortKeyIsMainKey() const
 {
     if (mDataPlottable)
     {
         return mDataPlottable->interface1D()->sortKeyIsMainKey();
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "no data plottable set";
         return true;
     }
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::selectTestRect
 */
 QCPDataSelection QCPErrorBars::selectTestRect(const QRectF &rect, bool onlySelectable) const
 {
     QCPDataSelection result;
     if (!mDataPlottable)
         return result;
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return result;
     if (!mKeyAxis || !mValueAxis)
         return result;
 
     QCPErrorBarsDataContainer::const_iterator visibleBegin, visibleEnd;
     getVisibleDataBounds(visibleBegin, visibleEnd, QCPDataRange(0, dataCount()));
 
     QVector<QLineF> backbones, whiskers;
     for (QCPErrorBarsDataContainer::const_iterator it = visibleBegin; it != visibleEnd; ++it)
     {
         backbones.clear();
         whiskers.clear();
         getErrorBarLines(it, backbones, whiskers);
         for (int i = 0; i < backbones.size(); ++i)
         {
             if (rectIntersectsLine(rect, backbones.at(i)))
             {
                 result.addDataRange(
                     QCPDataRange(it - mDataContainer->constBegin(), it - mDataContainer->constBegin() + 1), false);
                 break;
             }
         }
     }
     result.simplify();
     return result;
 }
 
 /* inherits documentation from base class */
 int QCPErrorBars::findBegin(double sortKey, bool expandedRange) const
 {
     if (mDataPlottable)
     {
         if (mDataContainer->isEmpty())
             return 0;
         int beginIndex = mDataPlottable->interface1D()->findBegin(sortKey, expandedRange);
         if (beginIndex >= mDataContainer->size())
             beginIndex = mDataContainer->size() - 1;
         return beginIndex;
     }
     else
         qDebug() << Q_FUNC_INFO << "no data plottable set";
     return 0;
 }
 
 /* inherits documentation from base class */
 int QCPErrorBars::findEnd(double sortKey, bool expandedRange) const
 {
     if (mDataPlottable)
     {
         if (mDataContainer->isEmpty())
             return 0;
         int endIndex = mDataPlottable->interface1D()->findEnd(sortKey, expandedRange);
         if (endIndex > mDataContainer->size())
             endIndex = mDataContainer->size();
         return endIndex;
     }
     else
         qDebug() << Q_FUNC_INFO << "no data plottable set";
     return 0;
 }
 
 /* inherits documentation from base class */
 double QCPErrorBars::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     if (!mDataPlottable)
         return -1;
 
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     if (mKeyAxis.data()->axisRect()->rect().contains(pos.toPoint()))
     {
         QCPErrorBarsDataContainer::const_iterator closestDataPoint = mDataContainer->constEnd();
         double result                                              = pointDistance(pos, closestDataPoint);
         if (details)
         {
             int pointIndex = closestDataPoint - mDataContainer->constBegin();
             details->setValue(QCPDataSelection(QCPDataRange(pointIndex, pointIndex + 1)));
         }
         return result;
     }
     else
         return -1;
 }
 
 /* inherits documentation from base class */
 void QCPErrorBars::draw(QCPPainter *painter)
 {
     if (!mDataPlottable)
         return;
     if (!mKeyAxis || !mValueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         return;
     }
     if (mKeyAxis.data()->range().size() <= 0 || mDataContainer->isEmpty())
         return;
 
     // if the sort key isn't the main key, we must check the visibility for each data point/error bar individually
     // (getVisibleDataBounds applies range restriction, but otherwise can only return full data range):
     bool checkPointVisibility = !mDataPlottable->interface1D()->sortKeyIsMainKey();
 
 // check data validity if flag set:
 #ifdef QCUSTOMPLOT_CHECK_DATA
     QCPErrorBarsDataContainer::const_iterator it;
     for (it = mDataContainer->constBegin(); it != mDataContainer->constEnd(); ++it)
     {
         if (QCP::isInvalidData(it->errorMinus, it->errorPlus))
             qDebug() << Q_FUNC_INFO << "Data point at index" << it - mDataContainer->constBegin() << "invalid."
                      << "Plottable name:" << name();
     }
 #endif
 
     applyDefaultAntialiasingHint(painter);
     painter->setBrush(Qt::NoBrush);
     // loop over and draw segments of unselected/selected data:
     QList<QCPDataRange> selectedSegments, unselectedSegments, allSegments;
     getDataSegments(selectedSegments, unselectedSegments);
     allSegments << unselectedSegments << selectedSegments;
     QVector<QLineF> backbones, whiskers;
     for (int i = 0; i < allSegments.size(); ++i)
     {
         QCPErrorBarsDataContainer::const_iterator begin, end;
         getVisibleDataBounds(begin, end, allSegments.at(i));
         if (begin == end)
             continue;
 
         bool isSelectedSegment = i >= unselectedSegments.size();
         if (isSelectedSegment && mSelectionDecorator)
             mSelectionDecorator->applyPen(painter);
         else
             painter->setPen(mPen);
         if (painter->pen().capStyle() == Qt::SquareCap)
         {
             QPen capFixPen(painter->pen());
             capFixPen.setCapStyle(Qt::FlatCap);
             painter->setPen(capFixPen);
         }
         backbones.clear();
         whiskers.clear();
         for (QCPErrorBarsDataContainer::const_iterator it = begin; it != end; ++it)
         {
             if (!checkPointVisibility || errorBarVisible(it - mDataContainer->constBegin()))
                 getErrorBarLines(it, backbones, whiskers);
         }
         painter->drawLines(backbones);
         painter->drawLines(whiskers);
     }
 
     // draw other selection decoration that isn't just line/scatter pens and brushes:
     if (mSelectionDecorator)
         mSelectionDecorator->drawDecoration(painter, selection());
 }
 
 /* inherits documentation from base class */
 void QCPErrorBars::drawLegendIcon(QCPPainter *painter, const QRectF &rect) const
 {
     applyDefaultAntialiasingHint(painter);
     painter->setPen(mPen);
     if (mErrorType == etValueError && mValueAxis && mValueAxis->orientation() == Qt::Vertical)
     {
         painter->drawLine(QLineF(rect.center().x(), rect.top() + 2, rect.center().x(), rect.bottom() - 1));
         painter->drawLine(QLineF(rect.center().x() - 4, rect.top() + 2, rect.center().x() + 4, rect.top() + 2));
         painter->drawLine(QLineF(rect.center().x() - 4, rect.bottom() - 1, rect.center().x() + 4, rect.bottom() - 1));
     }
     else
     {
         painter->drawLine(QLineF(rect.left() + 2, rect.center().y(), rect.right() - 2, rect.center().y()));
         painter->drawLine(QLineF(rect.left() + 2, rect.center().y() - 4, rect.left() + 2, rect.center().y() + 4));
         painter->drawLine(QLineF(rect.right() - 2, rect.center().y() - 4, rect.right() - 2, rect.center().y() + 4));
     }
 }
 
 /* inherits documentation from base class */
 QCPRange QCPErrorBars::getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain) const
 {
     if (!mDataPlottable)
     {
         foundRange = false;
         return QCPRange();
     }
 
     QCPRange range;
     bool haveLower = false;
     bool haveUpper = false;
     QCPErrorBarsDataContainer::const_iterator it;
     for (it = mDataContainer->constBegin(); it != mDataContainer->constEnd(); ++it)
     {
         if (mErrorType == etValueError)
         {
             // error bar doesn't extend in key dimension (except whisker but we ignore that here), so only use data point center
             const double current = mDataPlottable->interface1D()->dataMainKey(it - mDataContainer->constBegin());
             if (qIsNaN(current))
                 continue;
             if (inSignDomain == QCP::sdBoth || (inSignDomain == QCP::sdNegative && current < 0) ||
                 (inSignDomain == QCP::sdPositive && current > 0))
             {
                 if (current < range.lower || !haveLower)
                 {
                     range.lower = current;
                     haveLower   = true;
                 }
                 if (current > range.upper || !haveUpper)
                 {
                     range.upper = current;
                     haveUpper   = true;
                 }
             }
         }
         else // mErrorType == etKeyError
         {
             const double dataKey = mDataPlottable->interface1D()->dataMainKey(it - mDataContainer->constBegin());
             if (qIsNaN(dataKey))
                 continue;
             // plus error:
             double current = dataKey + (qIsNaN(it->errorPlus) ? 0 : it->errorPlus);
             if (inSignDomain == QCP::sdBoth || (inSignDomain == QCP::sdNegative && current < 0) ||
                 (inSignDomain == QCP::sdPositive && current > 0))
             {
                 if (current > range.upper || !haveUpper)
                 {
                     range.upper = current;
                     haveUpper   = true;
                 }
             }
             // minus error:
             current = dataKey - (qIsNaN(it->errorMinus) ? 0 : it->errorMinus);
             if (inSignDomain == QCP::sdBoth || (inSignDomain == QCP::sdNegative && current < 0) ||
                 (inSignDomain == QCP::sdPositive && current > 0))
             {
                 if (current < range.lower || !haveLower)
                 {
                     range.lower = current;
                     haveLower   = true;
                 }
             }
         }
     }
 
     if (haveUpper && !haveLower)
     {
         range.lower = range.upper;
         haveLower   = true;
     }
     else if (haveLower && !haveUpper)
     {
         range.upper = range.lower;
         haveUpper   = true;
     }
 
     foundRange = haveLower && haveUpper;
     return range;
 }
 
 /* inherits documentation from base class */
 QCPRange QCPErrorBars::getValueRange(bool &foundRange, QCP::SignDomain inSignDomain, const QCPRange &inKeyRange) const
 {
     if (!mDataPlottable)
     {
         foundRange = false;
         return QCPRange();
     }
 
     QCPRange range;
     const bool restrictKeyRange                       = inKeyRange != QCPRange();
     bool haveLower                                    = false;
     bool haveUpper                                    = false;
     QCPErrorBarsDataContainer::const_iterator itBegin = mDataContainer->constBegin();
     QCPErrorBarsDataContainer::const_iterator itEnd   = mDataContainer->constEnd();
     if (mDataPlottable->interface1D()->sortKeyIsMainKey() && restrictKeyRange)
     {
         itBegin = mDataContainer->constBegin() + findBegin(inKeyRange.lower);
         itEnd   = mDataContainer->constBegin() + findEnd(inKeyRange.upper);
     }
     for (QCPErrorBarsDataContainer::const_iterator it = itBegin; it != itEnd; ++it)
     {
         if (restrictKeyRange)
         {
             const double dataKey = mDataPlottable->interface1D()->dataMainKey(it - mDataContainer->constBegin());
             if (dataKey < inKeyRange.lower || dataKey > inKeyRange.upper)
                 continue;
         }
         if (mErrorType == etValueError)
         {
             const double dataValue = mDataPlottable->interface1D()->dataMainValue(it - mDataContainer->constBegin());
             if (qIsNaN(dataValue))
                 continue;
             // plus error:
             double current = dataValue + (qIsNaN(it->errorPlus) ? 0 : it->errorPlus);
             if (inSignDomain == QCP::sdBoth || (inSignDomain == QCP::sdNegative && current < 0) ||
                 (inSignDomain == QCP::sdPositive && current > 0))
             {
                 if (current > range.upper || !haveUpper)
                 {
                     range.upper = current;
                     haveUpper   = true;
                 }
             }
             // minus error:
             current = dataValue - (qIsNaN(it->errorMinus) ? 0 : it->errorMinus);
             if (inSignDomain == QCP::sdBoth || (inSignDomain == QCP::sdNegative && current < 0) ||
                 (inSignDomain == QCP::sdPositive && current > 0))
             {
                 if (current < range.lower || !haveLower)
                 {
                     range.lower = current;
                     haveLower   = true;
                 }
             }
         }
         else // mErrorType == etKeyError
         {
             // error bar doesn't extend in value dimension (except whisker but we ignore that here), so only use data point center
             const double current = mDataPlottable->interface1D()->dataMainValue(it - mDataContainer->constBegin());
             if (qIsNaN(current))
                 continue;
             if (inSignDomain == QCP::sdBoth || (inSignDomain == QCP::sdNegative && current < 0) ||
                 (inSignDomain == QCP::sdPositive && current > 0))
             {
                 if (current < range.lower || !haveLower)
                 {
                     range.lower = current;
                     haveLower   = true;
                 }
                 if (current > range.upper || !haveUpper)
                 {
                     range.upper = current;
                     haveUpper   = true;
                 }
             }
         }
     }
 
     if (haveUpper && !haveLower)
     {
         range.lower = range.upper;
         haveLower   = true;
     }
     else if (haveLower && !haveUpper)
     {
         range.upper = range.lower;
         haveUpper   = true;
     }
 
     foundRange = haveLower && haveUpper;
     return range;
 }
 
 /*! \internal
 
   Calculates the lines that make up the error bar belonging to the data point \a it.
 
   The resulting lines are added to \a backbones and \a whiskers. The vectors are not cleared, so
   calling this method with different \a it but the same \a backbones and \a whiskers allows to
   accumulate lines for multiple data points.
 
   This method assumes that \a it is a valid iterator within the bounds of this \ref QCPErrorBars
   instance and within the bounds of the associated data plottable.
 */
 void QCPErrorBars::getErrorBarLines(QCPErrorBarsDataContainer::const_iterator it, QVector<QLineF> &backbones,
                                     QVector<QLineF> &whiskers) const
 {
     if (!mDataPlottable)
         return;
 
     int index           = it - mDataContainer->constBegin();
     QPointF centerPixel = mDataPlottable->interface1D()->dataPixelPosition(index);
     if (qIsNaN(centerPixel.x()) || qIsNaN(centerPixel.y()))
         return;
     QCPAxis *errorAxis                = mErrorType == etValueError ? mValueAxis : mKeyAxis;
     QCPAxis *orthoAxis                = mErrorType == etValueError ? mKeyAxis : mValueAxis;
     const double centerErrorAxisPixel = errorAxis->orientation() == Qt::Horizontal ? centerPixel.x() : centerPixel.y();
     const double centerOrthoAxisPixel = orthoAxis->orientation() == Qt::Horizontal ? centerPixel.x() : centerPixel.y();
     const double centerErrorAxisCoord = errorAxis->pixelToCoord(
         centerErrorAxisPixel); // depending on plottable, this might be different from just mDataPlottable->interface1D()->dataMainKey/Value
     const double symbolGap = mSymbolGap * 0.5 * errorAxis->pixelOrientation();
     // plus error:
     double errorStart, errorEnd;
     if (!qIsNaN(it->errorPlus))
     {
         errorStart = centerErrorAxisPixel + symbolGap;
         errorEnd   = errorAxis->coordToPixel(centerErrorAxisCoord + it->errorPlus);
         if (errorAxis->orientation() == Qt::Vertical)
         {
             if ((errorStart > errorEnd) != errorAxis->rangeReversed())
                 backbones.append(QLineF(centerOrthoAxisPixel, errorStart, centerOrthoAxisPixel, errorEnd));
             whiskers.append(QLineF(centerOrthoAxisPixel - mWhiskerWidth * 0.5, errorEnd,
                                    centerOrthoAxisPixel + mWhiskerWidth * 0.5, errorEnd));
         }
         else
         {
             if ((errorStart < errorEnd) != errorAxis->rangeReversed())
                 backbones.append(QLineF(errorStart, centerOrthoAxisPixel, errorEnd, centerOrthoAxisPixel));
             whiskers.append(QLineF(errorEnd, centerOrthoAxisPixel - mWhiskerWidth * 0.5, errorEnd,
                                    centerOrthoAxisPixel + mWhiskerWidth * 0.5));
         }
     }
     // minus error:
     if (!qIsNaN(it->errorMinus))
     {
         errorStart = centerErrorAxisPixel - symbolGap;
         errorEnd   = errorAxis->coordToPixel(centerErrorAxisCoord - it->errorMinus);
         if (errorAxis->orientation() == Qt::Vertical)
         {
             if ((errorStart < errorEnd) != errorAxis->rangeReversed())
                 backbones.append(QLineF(centerOrthoAxisPixel, errorStart, centerOrthoAxisPixel, errorEnd));
             whiskers.append(QLineF(centerOrthoAxisPixel - mWhiskerWidth * 0.5, errorEnd,
                                    centerOrthoAxisPixel + mWhiskerWidth * 0.5, errorEnd));
         }
         else
         {
             if ((errorStart > errorEnd) != errorAxis->rangeReversed())
                 backbones.append(QLineF(errorStart, centerOrthoAxisPixel, errorEnd, centerOrthoAxisPixel));
             whiskers.append(QLineF(errorEnd, centerOrthoAxisPixel - mWhiskerWidth * 0.5, errorEnd,
                                    centerOrthoAxisPixel + mWhiskerWidth * 0.5));
         }
     }
 }
 
 /*! \internal
 
   This method outputs the currently visible data range via \a begin and \a end. The returned range
   will also never exceed \a rangeRestriction.
 
   Since error bars with type \ref etKeyError may extend to arbitrarily positive and negative key
   coordinates relative to their data point key, this method checks all outer error bars whether
   they truly don't reach into the visible portion of the axis rect, by calling \ref
   errorBarVisible. On the other hand error bars with type \ref etValueError that are associated
   with data plottables whose sort key is equal to the main key (see \ref qcpdatacontainer-datatype
   "QCPDataContainer DataType") can be handled very efficiently by finding the visible range of
   error bars through binary search (\ref QCPPlottableInterface1D::findBegin and \ref
   QCPPlottableInterface1D::findEnd).
 
   If the plottable's sort key is not equal to the main key, this method returns the full data
   range, only restricted by \a rangeRestriction. Drawing optimization then has to be done on a
   point-by-point basis in the \ref draw method.
 */
 void QCPErrorBars::getVisibleDataBounds(QCPErrorBarsDataContainer::const_iterator &begin,
                                         QCPErrorBarsDataContainer::const_iterator &end,
                                         const QCPDataRange &rangeRestriction) const
 {
     QCPAxis *keyAxis   = mKeyAxis.data();
     QCPAxis *valueAxis = mValueAxis.data();
     if (!keyAxis || !valueAxis)
     {
         qDebug() << Q_FUNC_INFO << "invalid key or value axis";
         end   = mDataContainer->constEnd();
         begin = end;
         return;
     }
     if (!mDataPlottable || rangeRestriction.isEmpty())
     {
         end   = mDataContainer->constEnd();
         begin = end;
         return;
     }
     if (!mDataPlottable->interface1D()->sortKeyIsMainKey())
     {
         // if the sort key isn't the main key, it's not possible to find a contiguous range of visible
         // data points, so this method then only applies the range restriction and otherwise returns
         // the full data range. Visibility checks must be done on a per-datapoin-basis during drawing
         QCPDataRange dataRange(0, mDataContainer->size());
         dataRange = dataRange.bounded(rangeRestriction);
         begin     = mDataContainer->constBegin() + dataRange.begin();
         end       = mDataContainer->constBegin() + dataRange.end();
         return;
     }
 
     // get visible data range via interface from data plottable, and then restrict to available error data points:
     const int n    = qMin(mDataContainer->size(), mDataPlottable->interface1D()->dataCount());
     int beginIndex = mDataPlottable->interface1D()->findBegin(keyAxis->range().lower);
     int endIndex   = mDataPlottable->interface1D()->findEnd(keyAxis->range().upper);
     int i          = beginIndex;
     while (i > 0 && i < n && i > rangeRestriction.begin())
     {
         if (errorBarVisible(i))
             beginIndex = i;
         --i;
     }
     i = endIndex;
     while (i >= 0 && i < n && i < rangeRestriction.end())
     {
         if (errorBarVisible(i))
             endIndex = i + 1;
         ++i;
     }
     QCPDataRange dataRange(beginIndex, endIndex);
     dataRange = dataRange.bounded(rangeRestriction.bounded(QCPDataRange(0, mDataContainer->size())));
     begin     = mDataContainer->constBegin() + dataRange.begin();
     end       = mDataContainer->constBegin() + dataRange.end();
 }
 
 /*! \internal
 
   Calculates the minimum distance in pixels the error bars' representation has from the given \a
   pixelPoint. This is used to determine whether the error bar was clicked or not, e.g. in \ref
   selectTest. The closest data point to \a pixelPoint is returned in \a closestData.
 */
 double QCPErrorBars::pointDistance(const QPointF &pixelPoint,
                                    QCPErrorBarsDataContainer::const_iterator &closestData) const
 {
     closestData = mDataContainer->constEnd();
     if (!mDataPlottable || mDataContainer->isEmpty())
         return -1.0;
 
     QCPErrorBarsDataContainer::const_iterator begin, end;
     getVisibleDataBounds(begin, end, QCPDataRange(0, dataCount()));
 
     // calculate minimum distances to error backbones (whiskers are ignored for speed) and find closestData iterator:
     double minDistSqr = std::numeric_limits<double>::max();
     QVector<QLineF> backbones, whiskers;
     for (QCPErrorBarsDataContainer::const_iterator it = begin; it != end; ++it)
     {
         getErrorBarLines(it, backbones, whiskers);
         for (int i = 0; i < backbones.size(); ++i)
         {
             const double currentDistSqr = QCPVector2D(pixelPoint).distanceSquaredToLine(backbones.at(i));
             if (currentDistSqr < minDistSqr)
             {
                 minDistSqr  = currentDistSqr;
                 closestData = it;
             }
         }
     }
     return qSqrt(minDistSqr);
 }
 
 /*! \internal
 
   \note This method is identical to \ref QCPAbstractPlottable1D::getDataSegments but needs to be
   reproduced here since the \ref QCPErrorBars plottable, as a special case that doesn't have its
   own key/value data coordinates, doesn't derive from \ref QCPAbstractPlottable1D. See the
   documentation there for details.
 */
 void QCPErrorBars::getDataSegments(QList<QCPDataRange> &selectedSegments, QList<QCPDataRange> &unselectedSegments) const
 {
     selectedSegments.clear();
     unselectedSegments.clear();
     if (mSelectable ==
         QCP::stWhole) // stWhole selection type draws the entire plottable with selected style if mSelection isn't empty
     {
         if (selected())
             selectedSegments << QCPDataRange(0, dataCount());
         else
             unselectedSegments << QCPDataRange(0, dataCount());
     }
     else
     {
         QCPDataSelection sel(selection());
         sel.simplify();
         selectedSegments   = sel.dataRanges();
         unselectedSegments = sel.inverse(QCPDataRange(0, dataCount())).dataRanges();
     }
 }
 
 /*! \internal
 
   Returns whether the error bar at the specified \a index is visible within the current key axis
   range.
 
   This method assumes for performance reasons without checking that the key axis, the value axis,
   and the data plottable (\ref setDataPlottable) are not zero and that \a index is within valid
   bounds of this \ref QCPErrorBars instance and the bounds of the data plottable.
 */
 bool QCPErrorBars::errorBarVisible(int index) const
 {
     QPointF centerPixel         = mDataPlottable->interface1D()->dataPixelPosition(index);
     const double centerKeyPixel = mKeyAxis->orientation() == Qt::Horizontal ? centerPixel.x() : centerPixel.y();
     if (qIsNaN(centerKeyPixel))
         return false;
 
     double keyMin, keyMax;
     if (mErrorType == etKeyError)
     {
         const double centerKey  = mKeyAxis->pixelToCoord(centerKeyPixel);
         const double errorPlus  = mDataContainer->at(index).errorPlus;
         const double errorMinus = mDataContainer->at(index).errorMinus;
         keyMax                  = centerKey + (qIsNaN(errorPlus) ? 0 : errorPlus);
         keyMin                  = centerKey - (qIsNaN(errorMinus) ? 0 : errorMinus);
     }
     else // mErrorType == etValueError
     {
         keyMax = mKeyAxis->pixelToCoord(centerKeyPixel + mWhiskerWidth * 0.5 * mKeyAxis->pixelOrientation());
         keyMin = mKeyAxis->pixelToCoord(centerKeyPixel - mWhiskerWidth * 0.5 * mKeyAxis->pixelOrientation());
     }
     return ((keyMax > mKeyAxis->range().lower) && (keyMin < mKeyAxis->range().upper));
 }
 
 /*! \internal
 
   Returns whether \a line intersects (or is contained in) \a pixelRect.
 
   \a line is assumed to be either perfectly horizontal or perfectly vertical, as is the case for
   error bar lines.
 */
 bool QCPErrorBars::rectIntersectsLine(const QRectF &pixelRect, const QLineF &line) const
 {
     if (pixelRect.left() > line.x1() && pixelRect.left() > line.x2())
         return false;
     else if (pixelRect.right() < line.x1() && pixelRect.right() < line.x2())
         return false;
     else if (pixelRect.top() > line.y1() && pixelRect.top() > line.y2())
         return false;
     else if (pixelRect.bottom() < line.y1() && pixelRect.bottom() < line.y2())
         return false;
     else
         return true;
 }
 /* end of 'src/plottables/plottable-errorbar.cpp' */
 
 /* including file 'src/items/item-straightline.cpp', size 7592               */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemStraightLine
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemStraightLine
   \brief A straight line that spans infinitely in both directions
 
   \image html QCPItemStraightLine.png "Straight line example. Blue dotted circles are anchors, solid blue discs are positions."
 
   It has two positions, \a point1 and \a point2, which define the straight line.
 */
 
 /*!
   Creates a straight line item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemStraightLine::QCPItemStraightLine(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), point1(createPosition(QLatin1String("point1"))),
       point2(createPosition(QLatin1String("point2")))
 {
     point1->setCoords(0, 0);
     point2->setCoords(1, 1);
 
     setPen(QPen(Qt::black));
     setSelectedPen(QPen(Qt::blue, 2));
 }
 
 QCPItemStraightLine::~QCPItemStraightLine()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the line
 
   \see setSelectedPen
 */
 void QCPItemStraightLine::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw the line when selected
 
   \see setPen, setSelected
 */
 void QCPItemStraightLine::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /* inherits documentation from base class */
 double QCPItemStraightLine::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     return QCPVector2D(pos).distanceToStraightLine(point1->pixelPosition(),
                                                    point2->pixelPosition() - point1->pixelPosition());
 }
 
 /* inherits documentation from base class */
 void QCPItemStraightLine::draw(QCPPainter *painter)
 {
     QCPVector2D start(point1->pixelPosition());
     QCPVector2D end(point2->pixelPosition());
     // get visible segment of straight line inside clipRect:
     double clipPad = mainPen().widthF();
     QLineF line =
         getRectClippedStraightLine(start, end - start, clipRect().adjusted(-clipPad, -clipPad, clipPad, clipPad));
     // paint visible segment, if existent:
     if (!line.isNull())
     {
         painter->setPen(mainPen());
         painter->drawLine(line);
     }
 }
 
 /*! \internal
 
   Returns the section of the straight line defined by \a base and direction vector \a
   vec, that is visible in the specified \a rect.
 
   This is a helper function for \ref draw.
 */
 QLineF QCPItemStraightLine::getRectClippedStraightLine(const QCPVector2D &base, const QCPVector2D &vec,
                                                        const QRect &rect) const
 {
     double bx, by;
     double gamma;
     QLineF result;
     if (vec.x() == 0 && vec.y() == 0)
         return result;
     if (qFuzzyIsNull(vec.x())) // line is vertical
     {
         // check top of rect:
         bx    = rect.left();
         by    = rect.top();
         gamma = base.x() - bx + (by - base.y()) * vec.x() / vec.y();
         if (gamma >= 0 && gamma <= rect.width())
             result.setLine(bx + gamma, rect.top(), bx + gamma,
                            rect.bottom()); // no need to check bottom because we know line is vertical
     }
     else if (qFuzzyIsNull(vec.y())) // line is horizontal
     {
         // check left of rect:
         bx    = rect.left();
         by    = rect.top();
         gamma = base.y() - by + (bx - base.x()) * vec.y() / vec.x();
         if (gamma >= 0 && gamma <= rect.height())
             result.setLine(rect.left(), by + gamma, rect.right(),
                            by + gamma); // no need to check right because we know line is horizontal
     }
     else // line is skewed
     {
         QList<QCPVector2D> pointVectors;
         // check top of rect:
         bx    = rect.left();
         by    = rect.top();
         gamma = base.x() - bx + (by - base.y()) * vec.x() / vec.y();
         if (gamma >= 0 && gamma <= rect.width())
             pointVectors.append(QCPVector2D(bx + gamma, by));
         // check bottom of rect:
         bx    = rect.left();
         by    = rect.bottom();
         gamma = base.x() - bx + (by - base.y()) * vec.x() / vec.y();
         if (gamma >= 0 && gamma <= rect.width())
             pointVectors.append(QCPVector2D(bx + gamma, by));
         // check left of rect:
         bx    = rect.left();
         by    = rect.top();
         gamma = base.y() - by + (bx - base.x()) * vec.y() / vec.x();
         if (gamma >= 0 && gamma <= rect.height())
             pointVectors.append(QCPVector2D(bx, by + gamma));
         // check right of rect:
         bx    = rect.right();
         by    = rect.top();
         gamma = base.y() - by + (bx - base.x()) * vec.y() / vec.x();
         if (gamma >= 0 && gamma <= rect.height())
             pointVectors.append(QCPVector2D(bx, by + gamma));
 
         // evaluate points:
         if (pointVectors.size() == 2)
         {
             result.setPoints(pointVectors.at(0).toPointF(), pointVectors.at(1).toPointF());
         }
         else if (pointVectors.size() > 2)
         {
             // line probably goes through corner of rect, and we got two points there. single out the point pair with greatest distance:
             double distSqrMax = 0;
             QCPVector2D pv1, pv2;
             for (int i = 0; i < pointVectors.size() - 1; ++i)
             {
                 for (int k = i + 1; k < pointVectors.size(); ++k)
                 {
                     double distSqr = (pointVectors.at(i) - pointVectors.at(k)).lengthSquared();
                     if (distSqr > distSqrMax)
                     {
                         pv1        = pointVectors.at(i);
                         pv2        = pointVectors.at(k);
                         distSqrMax = distSqr;
                     }
                 }
             }
             result.setPoints(pv1.toPointF(), pv2.toPointF());
         }
     }
     return result;
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the
   item is not selected and mSelectedPen when it is.
 */
 QPen QCPItemStraightLine::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 /* end of 'src/items/item-straightline.cpp' */
 
 /* including file 'src/items/item-line.cpp', size 8498                       */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemLine
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemLine
   \brief A line from one point to another
 
   \image html QCPItemLine.png "Line example. Blue dotted circles are anchors, solid blue discs are positions."
 
   It has two positions, \a start and \a end, which define the end points of the line.
 
   With \ref setHead and \ref setTail you may set different line ending styles, e.g. to create an arrow.
 */
 
 /*!
   Creates a line item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemLine::QCPItemLine(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), start(createPosition(QLatin1String("start"))),
       end(createPosition(QLatin1String("end")))
 {
     start->setCoords(0, 0);
     end->setCoords(1, 1);
 
     setPen(QPen(Qt::black));
     setSelectedPen(QPen(Qt::blue, 2));
 }
 
 QCPItemLine::~QCPItemLine()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the line
 
   \see setSelectedPen
 */
 void QCPItemLine::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw the line when selected
 
   \see setPen, setSelected
 */
 void QCPItemLine::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /*!
   Sets the line ending style of the head. The head corresponds to the \a end position.
 
   Note that due to the overloaded QCPLineEnding constructor, you may directly specify
   a QCPLineEnding::EndingStyle here, e.g. \code setHead(QCPLineEnding::esSpikeArrow) \endcode
 
   \see setTail
 */
 void QCPItemLine::setHead(const QCPLineEnding &head)
 {
     mHead = head;
 }
 
 /*!
   Sets the line ending style of the tail. The tail corresponds to the \a start position.
 
   Note that due to the overloaded QCPLineEnding constructor, you may directly specify
   a QCPLineEnding::EndingStyle here, e.g. \code setTail(QCPLineEnding::esSpikeArrow) \endcode
 
   \see setHead
 */
 void QCPItemLine::setTail(const QCPLineEnding &tail)
 {
     mTail = tail;
 }
 
 /* inherits documentation from base class */
 double QCPItemLine::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     return qSqrt(QCPVector2D(pos).distanceSquaredToLine(start->pixelPosition(), end->pixelPosition()));
 }
 
 /* inherits documentation from base class */
 void QCPItemLine::draw(QCPPainter *painter)
 {
     QCPVector2D startVec(start->pixelPosition());
     QCPVector2D endVec(end->pixelPosition());
     if (qFuzzyIsNull((startVec - endVec).lengthSquared()))
         return;
     // get visible segment of straight line inside clipRect:
     double clipPad = qMax(mHead.boundingDistance(), mTail.boundingDistance());
     clipPad        = qMax(clipPad, (double)mainPen().widthF());
     QLineF line    = getRectClippedLine(startVec, endVec, clipRect().adjusted(-clipPad, -clipPad, clipPad, clipPad));
     // paint visible segment, if existent:
     if (!line.isNull())
     {
         painter->setPen(mainPen());
         painter->drawLine(line);
         painter->setBrush(Qt::SolidPattern);
         if (mTail.style() != QCPLineEnding::esNone)
             mTail.draw(painter, startVec, startVec - endVec);
         if (mHead.style() != QCPLineEnding::esNone)
             mHead.draw(painter, endVec, endVec - startVec);
     }
 }
 
 /*! \internal
 
   Returns the section of the line defined by \a start and \a end, that is visible in the specified
   \a rect.
 
   This is a helper function for \ref draw.
 */
 QLineF QCPItemLine::getRectClippedLine(const QCPVector2D &start, const QCPVector2D &end, const QRect &rect) const
 {
     bool containsStart = rect.contains(start.x(), start.y());
     bool containsEnd   = rect.contains(end.x(), end.y());
     if (containsStart && containsEnd)
         return QLineF(start.toPointF(), end.toPointF());
 
     QCPVector2D base = start;
     QCPVector2D vec  = end - start;
     double bx, by;
     double gamma, mu;
     QLineF result;
     QList<QCPVector2D> pointVectors;
 
     if (!qFuzzyIsNull(vec.y())) // line is not horizontal
     {
         // check top of rect:
         bx = rect.left();
         by = rect.top();
         mu = (by - base.y()) / vec.y();
         if (mu >= 0 && mu <= 1)
         {
             gamma = base.x() - bx + mu * vec.x();
             if (gamma >= 0 && gamma <= rect.width())
                 pointVectors.append(QCPVector2D(bx + gamma, by));
         }
         // check bottom of rect:
         bx = rect.left();
         by = rect.bottom();
         mu = (by - base.y()) / vec.y();
         if (mu >= 0 && mu <= 1)
         {
             gamma = base.x() - bx + mu * vec.x();
             if (gamma >= 0 && gamma <= rect.width())
                 pointVectors.append(QCPVector2D(bx + gamma, by));
         }
     }
     if (!qFuzzyIsNull(vec.x())) // line is not vertical
     {
         // check left of rect:
         bx = rect.left();
         by = rect.top();
         mu = (bx - base.x()) / vec.x();
         if (mu >= 0 && mu <= 1)
         {
             gamma = base.y() - by + mu * vec.y();
             if (gamma >= 0 && gamma <= rect.height())
                 pointVectors.append(QCPVector2D(bx, by + gamma));
         }
         // check right of rect:
         bx = rect.right();
         by = rect.top();
         mu = (bx - base.x()) / vec.x();
         if (mu >= 0 && mu <= 1)
         {
             gamma = base.y() - by + mu * vec.y();
             if (gamma >= 0 && gamma <= rect.height())
                 pointVectors.append(QCPVector2D(bx, by + gamma));
         }
     }
 
     if (containsStart)
         pointVectors.append(start);
     if (containsEnd)
         pointVectors.append(end);
 
     // evaluate points:
     if (pointVectors.size() == 2)
     {
         result.setPoints(pointVectors.at(0).toPointF(), pointVectors.at(1).toPointF());
     }
     else if (pointVectors.size() > 2)
     {
         // line probably goes through corner of rect, and we got two points there. single out the point pair with greatest distance:
         double distSqrMax = 0;
         QCPVector2D pv1, pv2;
         for (int i = 0; i < pointVectors.size() - 1; ++i)
         {
             for (int k = i + 1; k < pointVectors.size(); ++k)
             {
                 double distSqr = (pointVectors.at(i) - pointVectors.at(k)).lengthSquared();
                 if (distSqr > distSqrMax)
                 {
                     pv1        = pointVectors.at(i);
                     pv2        = pointVectors.at(k);
                     distSqrMax = distSqr;
                 }
             }
         }
         result.setPoints(pv1.toPointF(), pv2.toPointF());
     }
     return result;
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the
   item is not selected and mSelectedPen when it is.
 */
 QPen QCPItemLine::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 /* end of 'src/items/item-line.cpp' */
 
 /* including file 'src/items/item-curve.cpp', size 7159                      */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemCurve
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemCurve
   \brief A curved line from one point to another
 
   \image html QCPItemCurve.png "Curve example. Blue dotted circles are anchors, solid blue discs are positions."
 
   It has four positions, \a start and \a end, which define the end points of the line, and two
   control points which define the direction the line exits from the start and the direction from
   which it approaches the end: \a startDir and \a endDir.
 
   With \ref setHead and \ref setTail you may set different line ending styles, e.g. to create an
   arrow.
 
   Often it is desirable for the control points to stay at fixed relative positions to the start/end
   point. This can be achieved by setting the parent anchor e.g. of \a startDir simply to \a start,
   and then specify the desired pixel offset with QCPItemPosition::setCoords on \a startDir.
 */
 
 /*!
   Creates a curve item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemCurve::QCPItemCurve(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), start(createPosition(QLatin1String("start"))),
       startDir(createPosition(QLatin1String("startDir"))), endDir(createPosition(QLatin1String("endDir"))),
       end(createPosition(QLatin1String("end")))
 {
     start->setCoords(0, 0);
     startDir->setCoords(0.5, 0);
     endDir->setCoords(0, 0.5);
     end->setCoords(1, 1);
 
     setPen(QPen(Qt::black));
     setSelectedPen(QPen(Qt::blue, 2));
 }
 
 QCPItemCurve::~QCPItemCurve()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the line
 
   \see setSelectedPen
 */
 void QCPItemCurve::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw the line when selected
 
   \see setPen, setSelected
 */
 void QCPItemCurve::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /*!
   Sets the line ending style of the head. The head corresponds to the \a end position.
 
   Note that due to the overloaded QCPLineEnding constructor, you may directly specify
   a QCPLineEnding::EndingStyle here, e.g. \code setHead(QCPLineEnding::esSpikeArrow) \endcode
 
   \see setTail
 */
 void QCPItemCurve::setHead(const QCPLineEnding &head)
 {
     mHead = head;
 }
 
 /*!
   Sets the line ending style of the tail. The tail corresponds to the \a start position.
 
   Note that due to the overloaded QCPLineEnding constructor, you may directly specify
   a QCPLineEnding::EndingStyle here, e.g. \code setTail(QCPLineEnding::esSpikeArrow) \endcode
 
   \see setHead
 */
 void QCPItemCurve::setTail(const QCPLineEnding &tail)
 {
     mTail = tail;
 }
 
 /* inherits documentation from base class */
 double QCPItemCurve::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     QPointF startVec(start->pixelPosition());
     QPointF startDirVec(startDir->pixelPosition());
     QPointF endDirVec(endDir->pixelPosition());
     QPointF endVec(end->pixelPosition());
 
     QPainterPath cubicPath(startVec);
     cubicPath.cubicTo(startDirVec, endDirVec, endVec);
 
     QPolygonF polygon = cubicPath.toSubpathPolygons().first();
     QCPVector2D p(pos);
     double minDistSqr = std::numeric_limits<double>::max();
     for (int i = 1; i < polygon.size(); ++i)
     {
         double distSqr = p.distanceSquaredToLine(polygon.at(i - 1), polygon.at(i));
         if (distSqr < minDistSqr)
             minDistSqr = distSqr;
     }
     return qSqrt(minDistSqr);
 }
 
 /* inherits documentation from base class */
 void QCPItemCurve::draw(QCPPainter *painter)
 {
     QCPVector2D startVec(start->pixelPosition());
     QCPVector2D startDirVec(startDir->pixelPosition());
     QCPVector2D endDirVec(endDir->pixelPosition());
     QCPVector2D endVec(end->pixelPosition());
     if ((endVec - startVec).length() > 1e10) // too large curves cause crash
         return;
 
     QPainterPath cubicPath(startVec.toPointF());
     cubicPath.cubicTo(startDirVec.toPointF(), endDirVec.toPointF(), endVec.toPointF());
 
     // paint visible segment, if existent:
     QRect clip = clipRect().adjusted(-mainPen().widthF(), -mainPen().widthF(), mainPen().widthF(), mainPen().widthF());
     QRect cubicRect = cubicPath.controlPointRect().toRect();
     if (cubicRect.isEmpty()) // may happen when start and end exactly on same x or y position
         cubicRect.adjust(0, 0, 1, 1);
     if (clip.intersects(cubicRect))
     {
         painter->setPen(mainPen());
         painter->drawPath(cubicPath);
         painter->setBrush(Qt::SolidPattern);
         if (mTail.style() != QCPLineEnding::esNone)
             mTail.draw(painter, startVec, M_PI - cubicPath.angleAtPercent(0) / 180.0 * M_PI);
         if (mHead.style() != QCPLineEnding::esNone)
             mHead.draw(painter, endVec, -cubicPath.angleAtPercent(1) / 180.0 * M_PI);
     }
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the
   item is not selected and mSelectedPen when it is.
 */
 QPen QCPItemCurve::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 /* end of 'src/items/item-curve.cpp' */
 
 /* including file 'src/items/item-rect.cpp', size 6479                       */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemRect
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemRect
   \brief A rectangle
 
   \image html QCPItemRect.png "Rectangle example. Blue dotted circles are anchors, solid blue discs are positions."
 
   It has two positions, \a topLeft and \a bottomRight, which define the rectangle.
 */
 
 /*!
   Creates a rectangle item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemRect::QCPItemRect(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), topLeft(createPosition(QLatin1String("topLeft"))),
       bottomRight(createPosition(QLatin1String("bottomRight"))), top(createAnchor(QLatin1String("top"), aiTop)),
       topRight(createAnchor(QLatin1String("topRight"), aiTopRight)),
       right(createAnchor(QLatin1String("right"), aiRight)), bottom(createAnchor(QLatin1String("bottom"), aiBottom)),
       bottomLeft(createAnchor(QLatin1String("bottomLeft"), aiBottomLeft)),
       left(createAnchor(QLatin1String("left"), aiLeft))
 {
     topLeft->setCoords(0, 1);
     bottomRight->setCoords(1, 0);
 
     setPen(QPen(Qt::black));
     setSelectedPen(QPen(Qt::blue, 2));
     setBrush(Qt::NoBrush);
     setSelectedBrush(Qt::NoBrush);
 }
 
 QCPItemRect::~QCPItemRect()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the line of the rectangle
 
   \see setSelectedPen, setBrush
 */
 void QCPItemRect::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw the line of the rectangle when selected
 
   \see setPen, setSelected
 */
 void QCPItemRect::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /*!
   Sets the brush that will be used to fill the rectangle. To disable filling, set \a brush to
   Qt::NoBrush.
 
   \see setSelectedBrush, setPen
 */
 void QCPItemRect::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   Sets the brush that will be used to fill the rectangle when selected. To disable filling, set \a
   brush to Qt::NoBrush.
 
   \see setBrush
 */
 void QCPItemRect::setSelectedBrush(const QBrush &brush)
 {
     mSelectedBrush = brush;
 }
 
 /* inherits documentation from base class */
 double QCPItemRect::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     QRectF rect     = QRectF(topLeft->pixelPosition(), bottomRight->pixelPosition()).normalized();
     bool filledRect = mBrush.style() != Qt::NoBrush && mBrush.color().alpha() != 0;
     return rectDistance(rect, pos, filledRect);
 }
 
 /* inherits documentation from base class */
 void QCPItemRect::draw(QCPPainter *painter)
 {
     QPointF p1 = topLeft->pixelPosition();
     QPointF p2 = bottomRight->pixelPosition();
     if (p1.toPoint() == p2.toPoint())
         return;
     QRectF rect         = QRectF(p1, p2).normalized();
     double clipPad      = mainPen().widthF();
     QRectF boundingRect = rect.adjusted(-clipPad, -clipPad, clipPad, clipPad);
     if (boundingRect.intersects(clipRect())) // only draw if bounding rect of rect item is visible in cliprect
     {
         painter->setPen(mainPen());
         painter->setBrush(mainBrush());
         painter->drawRect(rect);
     }
 }
 
 /* inherits documentation from base class */
 QPointF QCPItemRect::anchorPixelPosition(int anchorId) const
 {
     QRectF rect = QRectF(topLeft->pixelPosition(), bottomRight->pixelPosition());
     switch (anchorId)
     {
         case aiTop:
             return (rect.topLeft() + rect.topRight()) * 0.5;
         case aiTopRight:
             return rect.topRight();
         case aiRight:
             return (rect.topRight() + rect.bottomRight()) * 0.5;
         case aiBottom:
             return (rect.bottomLeft() + rect.bottomRight()) * 0.5;
         case aiBottomLeft:
             return rect.bottomLeft();
         case aiLeft:
             return (rect.topLeft() + rect.bottomLeft()) * 0.5;
     }
 
     qDebug() << Q_FUNC_INFO << "invalid anchorId" << anchorId;
     return QPointF();
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected
   and mSelectedPen when it is.
 */
 QPen QCPItemRect::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 
 /*! \internal
 
   Returns the brush that should be used for drawing fills of the item. Returns mBrush when the item
   is not selected and mSelectedBrush when it is.
 */
 QBrush QCPItemRect::mainBrush() const
 {
     return mSelected ? mSelectedBrush : mBrush;
 }
 /* end of 'src/items/item-rect.cpp' */
 
 /* including file 'src/items/item-text.cpp', size 13338                      */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemText
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemText
   \brief A text label
 
   \image html QCPItemText.png "Text example. Blue dotted circles are anchors, solid blue discs are positions."
 
   Its position is defined by the member \a position and the setting of \ref setPositionAlignment.
   The latter controls which part of the text rect shall be aligned with \a position.
 
   The text alignment itself (i.e. left, center, right) can be controlled with \ref
   setTextAlignment.
 
   The text may be rotated around the \a position point with \ref setRotation.
 */
 
 /*!
   Creates a text item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemText::QCPItemText(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), position(createPosition(QLatin1String("position"))),
       topLeft(createAnchor(QLatin1String("topLeft"), aiTopLeft)), top(createAnchor(QLatin1String("top"), aiTop)),
       topRight(createAnchor(QLatin1String("topRight"), aiTopRight)),
       right(createAnchor(QLatin1String("right"), aiRight)),
       bottomRight(createAnchor(QLatin1String("bottomRight"), aiBottomRight)),
       bottom(createAnchor(QLatin1String("bottom"), aiBottom)),
       bottomLeft(createAnchor(QLatin1String("bottomLeft"), aiBottomLeft)),
       left(createAnchor(QLatin1String("left"), aiLeft)), mText(QLatin1String("text")),
       mPositionAlignment(Qt::AlignCenter), mTextAlignment(Qt::AlignTop | Qt::AlignHCenter), mRotation(0)
 {
     position->setCoords(0, 0);
 
     setPen(Qt::NoPen);
     setSelectedPen(Qt::NoPen);
     setBrush(Qt::NoBrush);
     setSelectedBrush(Qt::NoBrush);
     setColor(Qt::black);
     setSelectedColor(Qt::blue);
 }
 
 QCPItemText::~QCPItemText()
 {
 }
 
 /*!
   Sets the color of the text.
 */
 void QCPItemText::setColor(const QColor &color)
 {
     mColor = color;
 }
 
 /*!
   Sets the color of the text that will be used when the item is selected.
 */
 void QCPItemText::setSelectedColor(const QColor &color)
 {
     mSelectedColor = color;
 }
 
 /*!
   Sets the pen that will be used do draw a rectangular border around the text. To disable the
   border, set \a pen to Qt::NoPen.
 
   \see setSelectedPen, setBrush, setPadding
 */
 void QCPItemText::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used do draw a rectangular border around the text, when the item is
   selected. To disable the border, set \a pen to Qt::NoPen.
 
   \see setPen
 */
 void QCPItemText::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /*!
   Sets the brush that will be used do fill the background of the text. To disable the
   background, set \a brush to Qt::NoBrush.
 
   \see setSelectedBrush, setPen, setPadding
 */
 void QCPItemText::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   Sets the brush that will be used do fill the background of the text, when the item is selected. To disable the
   background, set \a brush to Qt::NoBrush.
 
   \see setBrush
 */
 void QCPItemText::setSelectedBrush(const QBrush &brush)
 {
     mSelectedBrush = brush;
 }
 
 /*!
   Sets the font of the text.
 
   \see setSelectedFont, setColor
 */
 void QCPItemText::setFont(const QFont &font)
 {
     mFont = font;
 }
 
 /*!
   Sets the font of the text that will be used when the item is selected.
 
   \see setFont
 */
 void QCPItemText::setSelectedFont(const QFont &font)
 {
     mSelectedFont = font;
 }
 
 /*!
   Sets the text that will be displayed. Multi-line texts are supported by inserting a line break
   character, e.g. '\n'.
 
   \see setFont, setColor, setTextAlignment
 */
 void QCPItemText::setText(const QString &text)
 {
     mText = text;
 }
 
 /*!
   Sets which point of the text rect shall be aligned with \a position.
 
   Examples:
   \li If \a alignment is <tt>Qt::AlignHCenter | Qt::AlignTop</tt>, the text will be positioned such
   that the top of the text rect will be horizontally centered on \a position.
   \li If \a alignment is <tt>Qt::AlignLeft | Qt::AlignBottom</tt>, \a position will indicate the
   bottom left corner of the text rect.
 
   If you want to control the alignment of (multi-lined) text within the text rect, use \ref
   setTextAlignment.
 */
 void QCPItemText::setPositionAlignment(Qt::Alignment alignment)
 {
     mPositionAlignment = alignment;
 }
 
 /*!
   Controls how (multi-lined) text is aligned inside the text rect (typically Qt::AlignLeft, Qt::AlignCenter or Qt::AlignRight).
 */
 void QCPItemText::setTextAlignment(Qt::Alignment alignment)
 {
     mTextAlignment = alignment;
 }
 
 /*!
   Sets the angle in degrees by which the text (and the text rectangle, if visible) will be rotated
   around \a position.
 */
 void QCPItemText::setRotation(double degrees)
 {
     mRotation = degrees;
 }
 
 /*!
   Sets the distance between the border of the text rectangle and the text. The appearance (and
   visibility) of the text rectangle can be controlled with \ref setPen and \ref setBrush.
 */
 void QCPItemText::setPadding(const QMargins &padding)
 {
     mPadding = padding;
 }
 
 /* inherits documentation from base class */
 double QCPItemText::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     // The rect may be rotated, so we transform the actual clicked pos to the rotated
     // coordinate system, so we can use the normal rectDistance function for non-rotated rects:
     QPointF positionPixels(position->pixelPosition());
     QTransform inputTransform;
     inputTransform.translate(positionPixels.x(), positionPixels.y());
     inputTransform.rotate(-mRotation);
     inputTransform.translate(-positionPixels.x(), -positionPixels.y());
     QPointF rotatedPos = inputTransform.map(pos);
     QFontMetrics fontMetrics(mFont);
     QRect textRect    = fontMetrics.boundingRect(0, 0, 0, 0, Qt::TextDontClip | mTextAlignment, mText);
     QRect textBoxRect = textRect.adjusted(-mPadding.left(), -mPadding.top(), mPadding.right(), mPadding.bottom());
     QPointF textPos   = getTextDrawPoint(positionPixels, textBoxRect, mPositionAlignment);
     textBoxRect.moveTopLeft(textPos.toPoint());
 
     return rectDistance(textBoxRect, rotatedPos, true);
 }
 
 /* inherits documentation from base class */
 void QCPItemText::draw(QCPPainter *painter)
 {
     QPointF pos(position->pixelPosition());
     QTransform transform = painter->transform();
     transform.translate(pos.x(), pos.y());
     if (!qFuzzyIsNull(mRotation))
         transform.rotate(mRotation);
     painter->setFont(mainFont());
     QRect textRect    = painter->fontMetrics().boundingRect(0, 0, 0, 0, Qt::TextDontClip | mTextAlignment, mText);
     QRect textBoxRect = textRect.adjusted(-mPadding.left(), -mPadding.top(), mPadding.right(), mPadding.bottom());
     QPointF textPos   = getTextDrawPoint(QPointF(0, 0), textBoxRect,
                                        mPositionAlignment); // 0, 0 because the transform does the translation
     textRect.moveTopLeft(textPos.toPoint() + QPoint(mPadding.left(), mPadding.top()));
     textBoxRect.moveTopLeft(textPos.toPoint());
     double clipPad     = mainPen().widthF();
     QRect boundingRect = textBoxRect.adjusted(-clipPad, -clipPad, clipPad, clipPad);
     if (transform.mapRect(boundingRect).intersects(painter->transform().mapRect(clipRect())))
     {
         painter->setTransform(transform);
         if ((mainBrush().style() != Qt::NoBrush && mainBrush().color().alpha() != 0) ||
             (mainPen().style() != Qt::NoPen && mainPen().color().alpha() != 0))
         {
             painter->setPen(mainPen());
             painter->setBrush(mainBrush());
             painter->drawRect(textBoxRect);
         }
         painter->setBrush(Qt::NoBrush);
         painter->setPen(QPen(mainColor()));
         painter->drawText(textRect, Qt::TextDontClip | mTextAlignment, mText);
     }
 }
 
 /* inherits documentation from base class */
 QPointF QCPItemText::anchorPixelPosition(int anchorId) const
 {
     // get actual rect points (pretty much copied from draw function):
     QPointF pos(position->pixelPosition());
     QTransform transform;
     transform.translate(pos.x(), pos.y());
     if (!qFuzzyIsNull(mRotation))
         transform.rotate(mRotation);
     QFontMetrics fontMetrics(mainFont());
     QRect textRect     = fontMetrics.boundingRect(0, 0, 0, 0, Qt::TextDontClip | mTextAlignment, mText);
     QRectF textBoxRect = textRect.adjusted(-mPadding.left(), -mPadding.top(), mPadding.right(), mPadding.bottom());
     QPointF textPos    = getTextDrawPoint(QPointF(0, 0), textBoxRect,
                                        mPositionAlignment); // 0, 0 because the transform does the translation
     textBoxRect.moveTopLeft(textPos.toPoint());
     QPolygonF rectPoly = transform.map(QPolygonF(textBoxRect));
 
     switch (anchorId)
     {
         case aiTopLeft:
             return rectPoly.at(0);
         case aiTop:
             return (rectPoly.at(0) + rectPoly.at(1)) * 0.5;
         case aiTopRight:
             return rectPoly.at(1);
         case aiRight:
             return (rectPoly.at(1) + rectPoly.at(2)) * 0.5;
         case aiBottomRight:
             return rectPoly.at(2);
         case aiBottom:
             return (rectPoly.at(2) + rectPoly.at(3)) * 0.5;
         case aiBottomLeft:
             return rectPoly.at(3);
         case aiLeft:
             return (rectPoly.at(3) + rectPoly.at(0)) * 0.5;
     }
 
     qDebug() << Q_FUNC_INFO << "invalid anchorId" << anchorId;
     return QPointF();
 }
 
 /*! \internal
 
   Returns the point that must be given to the QPainter::drawText function (which expects the top
   left point of the text rect), according to the position \a pos, the text bounding box \a rect and
   the requested \a positionAlignment.
 
   For example, if \a positionAlignment is <tt>Qt::AlignLeft | Qt::AlignBottom</tt> the returned point
   will be shifted upward by the height of \a rect, starting from \a pos. So if the text is finally
   drawn at that point, the lower left corner of the resulting text rect is at \a pos.
 */
 QPointF QCPItemText::getTextDrawPoint(const QPointF &pos, const QRectF &rect, Qt::Alignment positionAlignment) const
 {
     if (positionAlignment == 0 || positionAlignment == (Qt::AlignLeft | Qt::AlignTop))
         return pos;
 
     QPointF result = pos; // start at top left
     if (positionAlignment.testFlag(Qt::AlignHCenter))
         result.rx() -= rect.width() / 2.0;
     else if (positionAlignment.testFlag(Qt::AlignRight))
         result.rx() -= rect.width();
     if (positionAlignment.testFlag(Qt::AlignVCenter))
         result.ry() -= rect.height() / 2.0;
     else if (positionAlignment.testFlag(Qt::AlignBottom))
         result.ry() -= rect.height();
     return result;
 }
 
 /*! \internal
 
   Returns the font that should be used for drawing text. Returns mFont when the item is not selected
   and mSelectedFont when it is.
 */
 QFont QCPItemText::mainFont() const
 {
     return mSelected ? mSelectedFont : mFont;
 }
 
 /*! \internal
 
   Returns the color that should be used for drawing text. Returns mColor when the item is not
   selected and mSelectedColor when it is.
 */
 QColor QCPItemText::mainColor() const
 {
     return mSelected ? mSelectedColor : mColor;
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected
   and mSelectedPen when it is.
 */
 QPen QCPItemText::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 
 /*! \internal
 
   Returns the brush that should be used for drawing fills of the item. Returns mBrush when the item
   is not selected and mSelectedBrush when it is.
 */
 QBrush QCPItemText::mainBrush() const
 {
     return mSelected ? mSelectedBrush : mBrush;
 }
 /* end of 'src/items/item-text.cpp' */
 
 /* including file 'src/items/item-ellipse.cpp', size 7863                    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemEllipse
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemEllipse
   \brief An ellipse
 
   \image html QCPItemEllipse.png "Ellipse example. Blue dotted circles are anchors, solid blue discs are positions."
 
   It has two positions, \a topLeft and \a bottomRight, which define the rect the ellipse will be drawn in.
 */
 
 /*!
   Creates an ellipse item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemEllipse::QCPItemEllipse(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), topLeft(createPosition(QLatin1String("topLeft"))),
       bottomRight(createPosition(QLatin1String("bottomRight"))),
       topLeftRim(createAnchor(QLatin1String("topLeftRim"), aiTopLeftRim)),
       top(createAnchor(QLatin1String("top"), aiTop)),
       topRightRim(createAnchor(QLatin1String("topRightRim"), aiTopRightRim)),
       right(createAnchor(QLatin1String("right"), aiRight)),
       bottomRightRim(createAnchor(QLatin1String("bottomRightRim"), aiBottomRightRim)),
       bottom(createAnchor(QLatin1String("bottom"), aiBottom)),
       bottomLeftRim(createAnchor(QLatin1String("bottomLeftRim"), aiBottomLeftRim)),
       left(createAnchor(QLatin1String("left"), aiLeft)), center(createAnchor(QLatin1String("center"), aiCenter))
 {
     topLeft->setCoords(0, 1);
     bottomRight->setCoords(1, 0);
 
     setPen(QPen(Qt::black));
     setSelectedPen(QPen(Qt::blue, 2));
     setBrush(Qt::NoBrush);
     setSelectedBrush(Qt::NoBrush);
 }
 
 QCPItemEllipse::~QCPItemEllipse()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the line of the ellipse
 
   \see setSelectedPen, setBrush
 */
 void QCPItemEllipse::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw the line of the ellipse when selected
 
   \see setPen, setSelected
 */
 void QCPItemEllipse::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /*!
   Sets the brush that will be used to fill the ellipse. To disable filling, set \a brush to
   Qt::NoBrush.
 
   \see setSelectedBrush, setPen
 */
 void QCPItemEllipse::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   Sets the brush that will be used to fill the ellipse when selected. To disable filling, set \a
   brush to Qt::NoBrush.
 
   \see setBrush
 */
 void QCPItemEllipse::setSelectedBrush(const QBrush &brush)
 {
     mSelectedBrush = brush;
 }
 
 /* inherits documentation from base class */
 double QCPItemEllipse::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     QPointF p1 = topLeft->pixelPosition();
     QPointF p2 = bottomRight->pixelPosition();
     QPointF center((p1 + p2) / 2.0);
     double a = qAbs(p1.x() - p2.x()) / 2.0;
     double b = qAbs(p1.y() - p2.y()) / 2.0;
     double x = pos.x() - center.x();
     double y = pos.y() - center.y();
 
     // distance to border:
     double c      = 1.0 / qSqrt(x * x / (a * a) + y * y / (b * b));
     double result = qAbs(c - 1) * qSqrt(x * x + y * y);
     // filled ellipse, allow click inside to count as hit:
     if (result > mParentPlot->selectionTolerance() * 0.99 && mBrush.style() != Qt::NoBrush &&
         mBrush.color().alpha() != 0)
     {
         if (x * x / (a * a) + y * y / (b * b) <= 1)
             result = mParentPlot->selectionTolerance() * 0.99;
     }
     return result;
 }
 
 /* inherits documentation from base class */
 void QCPItemEllipse::draw(QCPPainter *painter)
 {
     QPointF p1 = topLeft->pixelPosition();
     QPointF p2 = bottomRight->pixelPosition();
     if (p1.toPoint() == p2.toPoint())
         return;
     QRectF ellipseRect = QRectF(p1, p2).normalized();
     QRect clip = clipRect().adjusted(-mainPen().widthF(), -mainPen().widthF(), mainPen().widthF(), mainPen().widthF());
     if (ellipseRect.intersects(clip)) // only draw if bounding rect of ellipse is visible in cliprect
     {
         painter->setPen(mainPen());
         painter->setBrush(mainBrush());
 #ifdef __EXCEPTIONS
         try // drawEllipse sometimes throws exceptions if ellipse is too big
         {
 #endif
             painter->drawEllipse(ellipseRect);
 #ifdef __EXCEPTIONS
         }
         catch (...)
         {
             qDebug() << Q_FUNC_INFO << "Item too large for memory, setting invisible";
             setVisible(false);
         }
 #endif
     }
 }
 
 /* inherits documentation from base class */
 QPointF QCPItemEllipse::anchorPixelPosition(int anchorId) const
 {
     QRectF rect = QRectF(topLeft->pixelPosition(), bottomRight->pixelPosition());
     switch (anchorId)
     {
         case aiTopLeftRim:
             return rect.center() + (rect.topLeft() - rect.center()) * 1 / qSqrt(2);
         case aiTop:
             return (rect.topLeft() + rect.topRight()) * 0.5;
         case aiTopRightRim:
             return rect.center() + (rect.topRight() - rect.center()) * 1 / qSqrt(2);
         case aiRight:
             return (rect.topRight() + rect.bottomRight()) * 0.5;
         case aiBottomRightRim:
             return rect.center() + (rect.bottomRight() - rect.center()) * 1 / qSqrt(2);
         case aiBottom:
             return (rect.bottomLeft() + rect.bottomRight()) * 0.5;
         case aiBottomLeftRim:
             return rect.center() + (rect.bottomLeft() - rect.center()) * 1 / qSqrt(2);
         case aiLeft:
             return (rect.topLeft() + rect.bottomLeft()) * 0.5;
         case aiCenter:
             return (rect.topLeft() + rect.bottomRight()) * 0.5;
     }
 
     qDebug() << Q_FUNC_INFO << "invalid anchorId" << anchorId;
     return QPointF();
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected
   and mSelectedPen when it is.
 */
 QPen QCPItemEllipse::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 
 /*! \internal
 
   Returns the brush that should be used for drawing fills of the item. Returns mBrush when the item
   is not selected and mSelectedBrush when it is.
 */
 QBrush QCPItemEllipse::mainBrush() const
 {
     return mSelected ? mSelectedBrush : mBrush;
 }
 /* end of 'src/items/item-ellipse.cpp' */
 
 /* including file 'src/items/item-pixmap.cpp', size 10615                    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemPixmap
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemPixmap
   \brief An arbitrary pixmap
 
   \image html QCPItemPixmap.png "Pixmap example. Blue dotted circles are anchors, solid blue discs are positions."
 
   It has two positions, \a topLeft and \a bottomRight, which define the rectangle the pixmap will
   be drawn in. Depending on the scale setting (\ref setScaled), the pixmap will be either scaled to
   fit the rectangle or be drawn aligned to the topLeft position.
 
   If scaling is enabled and \a topLeft is further to the bottom/right than \a bottomRight (as shown
   on the right side of the example image), the pixmap will be flipped in the respective
   orientations.
 */
 
 /*!
   Creates a rectangle item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemPixmap::QCPItemPixmap(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), topLeft(createPosition(QLatin1String("topLeft"))),
       bottomRight(createPosition(QLatin1String("bottomRight"))), top(createAnchor(QLatin1String("top"), aiTop)),
       topRight(createAnchor(QLatin1String("topRight"), aiTopRight)),
       right(createAnchor(QLatin1String("right"), aiRight)), bottom(createAnchor(QLatin1String("bottom"), aiBottom)),
       bottomLeft(createAnchor(QLatin1String("bottomLeft"), aiBottomLeft)),
       left(createAnchor(QLatin1String("left"), aiLeft)), mScaled(false), mScaledPixmapInvalidated(true),
       mAspectRatioMode(Qt::KeepAspectRatio), mTransformationMode(Qt::SmoothTransformation)
 {
     topLeft->setCoords(0, 1);
     bottomRight->setCoords(1, 0);
 
     setPen(Qt::NoPen);
     setSelectedPen(QPen(Qt::blue));
 }
 
 QCPItemPixmap::~QCPItemPixmap()
 {
 }
 
 /*!
   Sets the pixmap that will be displayed.
 */
 void QCPItemPixmap::setPixmap(const QPixmap &pixmap)
 {
     mPixmap                  = pixmap;
     mScaledPixmapInvalidated = true;
     if (mPixmap.isNull())
         qDebug() << Q_FUNC_INFO << "pixmap is null";
 }
 
 /*!
   Sets whether the pixmap will be scaled to fit the rectangle defined by the \a topLeft and \a
   bottomRight positions.
 */
 void QCPItemPixmap::setScaled(bool scaled, Qt::AspectRatioMode aspectRatioMode,
                               Qt::TransformationMode transformationMode)
 {
     mScaled                  = scaled;
     mAspectRatioMode         = aspectRatioMode;
     mTransformationMode      = transformationMode;
     mScaledPixmapInvalidated = true;
 }
 
 /*!
   Sets the pen that will be used to draw a border around the pixmap.
 
   \see setSelectedPen, setBrush
 */
 void QCPItemPixmap::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw a border around the pixmap when selected
 
   \see setPen, setSelected
 */
 void QCPItemPixmap::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /* inherits documentation from base class */
 double QCPItemPixmap::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     return rectDistance(getFinalRect(), pos, true);
 }
 
 /* inherits documentation from base class */
 void QCPItemPixmap::draw(QCPPainter *painter)
 {
     bool flipHorz      = false;
     bool flipVert      = false;
     QRect rect         = getFinalRect(&flipHorz, &flipVert);
     double clipPad     = mainPen().style() == Qt::NoPen ? 0 : mainPen().widthF();
     QRect boundingRect = rect.adjusted(-clipPad, -clipPad, clipPad, clipPad);
     if (boundingRect.intersects(clipRect()))
     {
         updateScaledPixmap(rect, flipHorz, flipVert);
         painter->drawPixmap(rect.topLeft(), mScaled ? mScaledPixmap : mPixmap);
         QPen pen = mainPen();
         if (pen.style() != Qt::NoPen)
         {
             painter->setPen(pen);
             painter->setBrush(Qt::NoBrush);
             painter->drawRect(rect);
         }
     }
 }
 
 /* inherits documentation from base class */
 QPointF QCPItemPixmap::anchorPixelPosition(int anchorId) const
 {
     bool flipHorz;
     bool flipVert;
     QRect rect = getFinalRect(&flipHorz, &flipVert);
     // we actually want denormal rects (negative width/height) here, so restore
     // the flipped state:
     if (flipHorz)
         rect.adjust(rect.width(), 0, -rect.width(), 0);
     if (flipVert)
         rect.adjust(0, rect.height(), 0, -rect.height());
 
     switch (anchorId)
     {
         case aiTop:
             return (rect.topLeft() + rect.topRight()) * 0.5;
         case aiTopRight:
             return rect.topRight();
         case aiRight:
             return (rect.topRight() + rect.bottomRight()) * 0.5;
         case aiBottom:
             return (rect.bottomLeft() + rect.bottomRight()) * 0.5;
         case aiBottomLeft:
             return rect.bottomLeft();
         case aiLeft:
             return (rect.topLeft() + rect.bottomLeft()) * 0.5;
             ;
     }
 
     qDebug() << Q_FUNC_INFO << "invalid anchorId" << anchorId;
     return QPointF();
 }
 
 /*! \internal
 
   Creates the buffered scaled image (\a mScaledPixmap) to fit the specified \a finalRect. The
   parameters \a flipHorz and \a flipVert control whether the resulting image shall be flipped
   horizontally or vertically. (This is used when \a topLeft is further to the bottom/right than \a
   bottomRight.)
 
   This function only creates the scaled pixmap when the buffered pixmap has a different size than
   the expected result, so calling this function repeatedly, e.g. in the \ref draw function, does
   not cause expensive rescaling every time.
 
   If scaling is disabled, sets mScaledPixmap to a null QPixmap.
 */
 void QCPItemPixmap::updateScaledPixmap(QRect finalRect, bool flipHorz, bool flipVert)
 {
     if (mPixmap.isNull())
         return;
 
     if (mScaled)
     {
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
         double devicePixelRatio = mPixmap.devicePixelRatio();
 #else
         double devicePixelRatio = 1.0;
 #endif
         if (finalRect.isNull())
             finalRect = getFinalRect(&flipHorz, &flipVert);
         if (mScaledPixmapInvalidated || finalRect.size() != mScaledPixmap.size() / devicePixelRatio)
         {
             mScaledPixmap = mPixmap.scaled(finalRect.size() * devicePixelRatio, mAspectRatioMode, mTransformationMode);
             if (flipHorz || flipVert)
                 mScaledPixmap = QPixmap::fromImage(mScaledPixmap.toImage().mirrored(flipHorz, flipVert));
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
             mScaledPixmap.setDevicePixelRatio(devicePixelRatio);
 #endif
         }
     }
     else if (!mScaledPixmap.isNull())
         mScaledPixmap = QPixmap();
     mScaledPixmapInvalidated = false;
 }
 
 /*! \internal
 
   Returns the final (tight) rect the pixmap is drawn in, depending on the current item positions
   and scaling settings.
 
   The output parameters \a flippedHorz and \a flippedVert return whether the pixmap should be drawn
   flipped horizontally or vertically in the returned rect. (The returned rect itself is always
   normalized, i.e. the top left corner of the rect is actually further to the top/left than the
   bottom right corner). This is the case when the item position \a topLeft is further to the
   bottom/right than \a bottomRight.
 
   If scaling is disabled, returns a rect with size of the original pixmap and the top left corner
   aligned with the item position \a topLeft. The position \a bottomRight is ignored.
 */
 QRect QCPItemPixmap::getFinalRect(bool *flippedHorz, bool *flippedVert) const
 {
     QRect result;
     bool flipHorz = false;
     bool flipVert = false;
     QPoint p1     = topLeft->pixelPosition().toPoint();
     QPoint p2     = bottomRight->pixelPosition().toPoint();
     if (p1 == p2)
         return QRect(p1, QSize(0, 0));
     if (mScaled)
     {
         QSize newSize  = QSize(p2.x() - p1.x(), p2.y() - p1.y());
         QPoint topLeft = p1;
         if (newSize.width() < 0)
         {
             flipHorz = true;
             newSize.rwidth() *= -1;
             topLeft.setX(p2.x());
         }
         if (newSize.height() < 0)
         {
             flipVert = true;
             newSize.rheight() *= -1;
             topLeft.setY(p2.y());
         }
         QSize scaledSize = mPixmap.size();
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
         scaledSize /= mPixmap.devicePixelRatio();
         scaledSize.scale(newSize * mPixmap.devicePixelRatio(), mAspectRatioMode);
 #else
         scaledSize.scale(newSize, mAspectRatioMode);
 #endif
         result = QRect(topLeft, scaledSize);
     }
     else
     {
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
         result = QRect(p1, mPixmap.size() / mPixmap.devicePixelRatio());
 #else
         result = QRect(p1, mPixmap.size());
 #endif
     }
     if (flippedHorz)
         *flippedHorz = flipHorz;
     if (flippedVert)
         *flippedVert = flipVert;
     return result;
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected
   and mSelectedPen when it is.
 */
 QPen QCPItemPixmap::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 /* end of 'src/items/item-pixmap.cpp' */
 
 /* including file 'src/items/item-tracer.cpp', size 14624                    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemTracer
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemTracer
   \brief Item that sticks to QCPGraph data points
 
   \image html QCPItemTracer.png "Tracer example. Blue dotted circles are anchors, solid blue discs are positions."
 
   The tracer can be connected with a QCPGraph via \ref setGraph. Then it will automatically adopt
   the coordinate axes of the graph and update its \a position to be on the graph's data. This means
   the key stays controllable via \ref setGraphKey, but the value will follow the graph data. If a
   QCPGraph is connected, note that setting the coordinates of the tracer item directly via \a
   position will have no effect because they will be overriden in the next redraw (this is when the
   coordinate update happens).
 
   If the specified key in \ref setGraphKey is outside the key bounds of the graph, the tracer will
   stay at the corresponding end of the graph.
 
   With \ref setInterpolating you may specify whether the tracer may only stay exactly on data
   points or whether it interpolates data points linearly, if given a key that lies between two data
   points of the graph.
 
   The tracer has different visual styles, see \ref setStyle. It is also possible to make the tracer
   have no own visual appearance (set the style to \ref tsNone), and just connect other item
   positions to the tracer \a position (used as an anchor) via \ref
   QCPItemPosition::setParentAnchor.
 
   \note The tracer position is only automatically updated upon redraws. So when the data of the
   graph changes and immediately afterwards (without a redraw) the position coordinates of the
   tracer are retrieved, they will not reflect the updated data of the graph. In this case \ref
   updatePosition must be called manually, prior to reading the tracer coordinates.
 */
 
 /*!
   Creates a tracer item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemTracer::QCPItemTracer(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), position(createPosition(QLatin1String("position"))), mSize(6), mStyle(tsCrosshair),
-      mGraph(0), mGraphKey(0), mInterpolating(false)
+      mGraph(nullptr), mGraphKey(0), mInterpolating(false)
 {
     position->setCoords(0, 0);
 
     setBrush(Qt::NoBrush);
     setSelectedBrush(Qt::NoBrush);
     setPen(QPen(Qt::black));
     setSelectedPen(QPen(Qt::blue, 2));
 }
 
 QCPItemTracer::~QCPItemTracer()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the line of the tracer
 
   \see setSelectedPen, setBrush
 */
 void QCPItemTracer::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw the line of the tracer when selected
 
   \see setPen, setSelected
 */
 void QCPItemTracer::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /*!
   Sets the brush that will be used to draw any fills of the tracer
 
   \see setSelectedBrush, setPen
 */
 void QCPItemTracer::setBrush(const QBrush &brush)
 {
     mBrush = brush;
 }
 
 /*!
   Sets the brush that will be used to draw any fills of the tracer, when selected.
 
   \see setBrush, setSelected
 */
 void QCPItemTracer::setSelectedBrush(const QBrush &brush)
 {
     mSelectedBrush = brush;
 }
 
 /*!
   Sets the size of the tracer in pixels, if the style supports setting a size (e.g. \ref tsSquare
   does, \ref tsCrosshair does not).
 */
 void QCPItemTracer::setSize(double size)
 {
     mSize = size;
 }
 
 /*!
   Sets the style/visual appearance of the tracer.
 
   If you only want to use the tracer \a position as an anchor for other items, set \a style to
   \ref tsNone.
 */
 void QCPItemTracer::setStyle(QCPItemTracer::TracerStyle style)
 {
     mStyle = style;
 }
 
 /*!
   Sets the QCPGraph this tracer sticks to. The tracer \a position will be set to type
   QCPItemPosition::ptPlotCoords and the axes will be set to the axes of \a graph.
 
   To free the tracer from any graph, set \a graph to 0. The tracer \a position can then be placed
   freely like any other item position. This is the state the tracer will assume when its graph gets
   deleted while still attached to it.
 
   \see setGraphKey
 */
 void QCPItemTracer::setGraph(QCPGraph *graph)
 {
     if (graph)
     {
         if (graph->parentPlot() == mParentPlot)
         {
             position->setType(QCPItemPosition::ptPlotCoords);
             position->setAxes(graph->keyAxis(), graph->valueAxis());
             mGraph = graph;
             updatePosition();
         }
         else
             qDebug() << Q_FUNC_INFO << "graph isn't in same QCustomPlot instance as this item";
     }
     else
     {
-        mGraph = 0;
+        mGraph = nullptr;
     }
 }
 
 /*!
   Sets the key of the graph's data point the tracer will be positioned at. This is the only free
   coordinate of a tracer when attached to a graph.
 
   Depending on \ref setInterpolating, the tracer will be either positioned on the data point
   closest to \a key, or will stay exactly at \a key and interpolate the value linearly.
 
   \see setGraph, setInterpolating
 */
 void QCPItemTracer::setGraphKey(double key)
 {
     mGraphKey = key;
 }
 
 /*!
   Sets whether the value of the graph's data points shall be interpolated, when positioning the
   tracer.
 
   If \a enabled is set to false and a key is given with \ref setGraphKey, the tracer is placed on
   the data point of the graph which is closest to the key, but which is not necessarily exactly
   there. If \a enabled is true, the tracer will be positioned exactly at the specified key, and
   the appropriate value will be interpolated from the graph's data points linearly.
 
   \see setGraph, setGraphKey
 */
 void QCPItemTracer::setInterpolating(bool enabled)
 {
     mInterpolating = enabled;
 }
 
 /* inherits documentation from base class */
 double QCPItemTracer::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     QPointF center(position->pixelPosition());
     double w   = mSize / 2.0;
     QRect clip = clipRect();
     switch (mStyle)
     {
         case tsNone:
             return -1;
         case tsPlus:
         {
             if (clipRect().intersects(QRectF(center - QPointF(w, w), center + QPointF(w, w)).toRect()))
                 return qSqrt(
                     qMin(QCPVector2D(pos).distanceSquaredToLine(center + QPointF(-w, 0), center + QPointF(w, 0)),
                          QCPVector2D(pos).distanceSquaredToLine(center + QPointF(0, -w), center + QPointF(0, w))));
             break;
         }
         case tsCrosshair:
         {
             return qSqrt(qMin(QCPVector2D(pos).distanceSquaredToLine(QCPVector2D(clip.left(), center.y()),
                                                                      QCPVector2D(clip.right(), center.y())),
                               QCPVector2D(pos).distanceSquaredToLine(QCPVector2D(center.x(), clip.top()),
                                                                      QCPVector2D(center.x(), clip.bottom()))));
         }
         case tsCircle:
         {
             if (clip.intersects(QRectF(center - QPointF(w, w), center + QPointF(w, w)).toRect()))
             {
                 // distance to border:
                 double centerDist = QCPVector2D(center - pos).length();
                 double circleLine = w;
                 double result     = qAbs(centerDist - circleLine);
                 // filled ellipse, allow click inside to count as hit:
                 if (result > mParentPlot->selectionTolerance() * 0.99 && mBrush.style() != Qt::NoBrush &&
                     mBrush.color().alpha() != 0)
                 {
                     if (centerDist <= circleLine)
                         result = mParentPlot->selectionTolerance() * 0.99;
                 }
                 return result;
             }
             break;
         }
         case tsSquare:
         {
             if (clip.intersects(QRectF(center - QPointF(w, w), center + QPointF(w, w)).toRect()))
             {
                 QRectF rect     = QRectF(center - QPointF(w, w), center + QPointF(w, w));
                 bool filledRect = mBrush.style() != Qt::NoBrush && mBrush.color().alpha() != 0;
                 return rectDistance(rect, pos, filledRect);
             }
             break;
         }
     }
     return -1;
 }
 
 /* inherits documentation from base class */
 void QCPItemTracer::draw(QCPPainter *painter)
 {
     updatePosition();
     if (mStyle == tsNone)
         return;
 
     painter->setPen(mainPen());
     painter->setBrush(mainBrush());
     QPointF center(position->pixelPosition());
     double w   = mSize / 2.0;
     QRect clip = clipRect();
     switch (mStyle)
     {
         case tsNone:
             return;
         case tsPlus:
         {
             if (clip.intersects(QRectF(center - QPointF(w, w), center + QPointF(w, w)).toRect()))
             {
                 painter->drawLine(QLineF(center + QPointF(-w, 0), center + QPointF(w, 0)));
                 painter->drawLine(QLineF(center + QPointF(0, -w), center + QPointF(0, w)));
             }
             break;
         }
         case tsCrosshair:
         {
             if (center.y() > clip.top() && center.y() < clip.bottom())
                 painter->drawLine(QLineF(clip.left(), center.y(), clip.right(), center.y()));
             if (center.x() > clip.left() && center.x() < clip.right())
                 painter->drawLine(QLineF(center.x(), clip.top(), center.x(), clip.bottom()));
             break;
         }
         case tsCircle:
         {
             if (clip.intersects(QRectF(center - QPointF(w, w), center + QPointF(w, w)).toRect()))
                 painter->drawEllipse(center, w, w);
             break;
         }
         case tsSquare:
         {
             if (clip.intersects(QRectF(center - QPointF(w, w), center + QPointF(w, w)).toRect()))
                 painter->drawRect(QRectF(center - QPointF(w, w), center + QPointF(w, w)));
             break;
         }
     }
 }
 
 /*!
   If the tracer is connected with a graph (\ref setGraph), this function updates the tracer's \a
   position to reside on the graph data, depending on the configured key (\ref setGraphKey).
 
   It is called automatically on every redraw and normally doesn't need to be called manually. One
   exception is when you want to read the tracer coordinates via \a position and are not sure that
   the graph's data (or the tracer key with \ref setGraphKey) hasn't changed since the last redraw.
   In that situation, call this function before accessing \a position, to make sure you don't get
   out-of-date coordinates.
 
   If there is no graph set on this tracer, this function does nothing.
 */
 void QCPItemTracer::updatePosition()
 {
     if (mGraph)
     {
         if (mParentPlot->hasPlottable(mGraph))
         {
             if (mGraph->data()->size() > 1)
             {
                 QCPGraphDataContainer::const_iterator first = mGraph->data()->constBegin();
                 QCPGraphDataContainer::const_iterator last  = mGraph->data()->constEnd() - 1;
                 if (mGraphKey <= first->key)
                     position->setCoords(first->key, first->value);
                 else if (mGraphKey >= last->key)
                     position->setCoords(last->key, last->value);
                 else
                 {
                     QCPGraphDataContainer::const_iterator it = mGraph->data()->findBegin(mGraphKey);
                     if (it !=
                         mGraph->data()
                             ->constEnd()) // mGraphKey is not exactly on last iterator, but somewhere between iterators
                     {
                         QCPGraphDataContainer::const_iterator prevIt = it;
                         ++it; // won't advance to constEnd because we handled that case (mGraphKey >= last->key) before
                         if (mInterpolating)
                         {
                             // interpolate between iterators around mGraphKey:
                             double slope = 0;
                             if (!qFuzzyCompare((double)it->key, (double)prevIt->key))
                                 slope = (it->value - prevIt->value) / (it->key - prevIt->key);
                             position->setCoords(mGraphKey, (mGraphKey - prevIt->key) * slope + prevIt->value);
                         }
                         else
                         {
                             // find iterator with key closest to mGraphKey:
                             if (mGraphKey < (prevIt->key + it->key) * 0.5)
                                 position->setCoords(prevIt->key, prevIt->value);
                             else
                                 position->setCoords(it->key, it->value);
                         }
                     }
                     else // mGraphKey is exactly on last iterator (should actually be caught when comparing first/last keys, but this is a failsafe for fp uncertainty)
                         position->setCoords(it->key, it->value);
                 }
             }
             else if (mGraph->data()->size() == 1)
             {
                 QCPGraphDataContainer::const_iterator it = mGraph->data()->constBegin();
                 position->setCoords(it->key, it->value);
             }
             else
                 qDebug() << Q_FUNC_INFO << "graph has no data";
         }
         else
             qDebug() << Q_FUNC_INFO << "graph not contained in QCustomPlot instance (anymore)";
     }
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected
   and mSelectedPen when it is.
 */
 QPen QCPItemTracer::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 
 /*! \internal
 
   Returns the brush that should be used for drawing fills of the item. Returns mBrush when the item
   is not selected and mSelectedBrush when it is.
 */
 QBrush QCPItemTracer::mainBrush() const
 {
     return mSelected ? mSelectedBrush : mBrush;
 }
 /* end of 'src/items/item-tracer.cpp' */
 
 /* including file 'src/items/item-bracket.cpp', size 10687                   */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPItemBracket
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPItemBracket
   \brief A bracket for referencing/highlighting certain parts in the plot.
 
   \image html QCPItemBracket.png "Bracket example. Blue dotted circles are anchors, solid blue discs are positions."
 
   It has two positions, \a left and \a right, which define the span of the bracket. If \a left is
   actually farther to the left than \a right, the bracket is opened to the bottom, as shown in the
   example image.
 
   The bracket supports multiple styles via \ref setStyle. The length, i.e. how far the bracket
   stretches away from the embraced span, can be controlled with \ref setLength.
 
   \image html QCPItemBracket-length.png
   <center>Demonstrating the effect of different values for \ref setLength, for styles \ref
   bsCalligraphic and \ref bsSquare. Anchors and positions are displayed for reference.</center>
 
   It provides an anchor \a center, to allow connection of other items, e.g. an arrow (QCPItemLine
   or QCPItemCurve) or a text label (QCPItemText), to the bracket.
 */
 
 /*!
   Creates a bracket item and sets default values.
 
   The created item is automatically registered with \a parentPlot. This QCustomPlot instance takes
   ownership of the item, so do not delete it manually but use QCustomPlot::removeItem() instead.
 */
 QCPItemBracket::QCPItemBracket(QCustomPlot *parentPlot)
     : QCPAbstractItem(parentPlot), left(createPosition(QLatin1String("left"))),
       right(createPosition(QLatin1String("right"))), center(createAnchor(QLatin1String("center"), aiCenter)),
       mLength(8), mStyle(bsCalligraphic)
 {
     left->setCoords(0, 0);
     right->setCoords(1, 1);
 
     setPen(QPen(Qt::black));
     setSelectedPen(QPen(Qt::blue, 2));
 }
 
 QCPItemBracket::~QCPItemBracket()
 {
 }
 
 /*!
   Sets the pen that will be used to draw the bracket.
 
   Note that when the style is \ref bsCalligraphic, only the color will be taken from the pen, the
   stroke and width are ignored. To change the apparent stroke width of a calligraphic bracket, use
   \ref setLength, which has a similar effect.
 
   \see setSelectedPen
 */
 void QCPItemBracket::setPen(const QPen &pen)
 {
     mPen = pen;
 }
 
 /*!
   Sets the pen that will be used to draw the bracket when selected
 
   \see setPen, setSelected
 */
 void QCPItemBracket::setSelectedPen(const QPen &pen)
 {
     mSelectedPen = pen;
 }
 
 /*!
   Sets the \a length in pixels how far the bracket extends in the direction towards the embraced
   span of the bracket (i.e. perpendicular to the <i>left</i>-<i>right</i>-direction)
 
   \image html QCPItemBracket-length.png
   <center>Demonstrating the effect of different values for \ref setLength, for styles \ref
   bsCalligraphic and \ref bsSquare. Anchors and positions are displayed for reference.</center>
 */
 void QCPItemBracket::setLength(double length)
 {
     mLength = length;
 }
 
 /*!
   Sets the style of the bracket, i.e. the shape/visual appearance.
 
   \see setPen
 */
 void QCPItemBracket::setStyle(QCPItemBracket::BracketStyle style)
 {
     mStyle = style;
 }
 
 /* inherits documentation from base class */
 double QCPItemBracket::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     Q_UNUSED(details)
     if (onlySelectable && !mSelectable)
         return -1;
 
     QCPVector2D p(pos);
     QCPVector2D leftVec(left->pixelPosition());
     QCPVector2D rightVec(right->pixelPosition());
     if (leftVec.toPoint() == rightVec.toPoint())
         return -1;
 
     QCPVector2D widthVec  = (rightVec - leftVec) * 0.5;
     QCPVector2D lengthVec = widthVec.perpendicular().normalized() * mLength;
     QCPVector2D centerVec = (rightVec + leftVec) * 0.5 - lengthVec;
 
     switch (mStyle)
     {
         case QCPItemBracket::bsSquare:
         case QCPItemBracket::bsRound:
         {
             double a = p.distanceSquaredToLine(centerVec - widthVec, centerVec + widthVec);
             double b = p.distanceSquaredToLine(centerVec - widthVec + lengthVec, centerVec - widthVec);
             double c = p.distanceSquaredToLine(centerVec + widthVec + lengthVec, centerVec + widthVec);
             return qSqrt(qMin(qMin(a, b), c));
         }
         case QCPItemBracket::bsCurly:
         case QCPItemBracket::bsCalligraphic:
         {
             double a =
                 p.distanceSquaredToLine(centerVec - widthVec * 0.75 + lengthVec * 0.15, centerVec + lengthVec * 0.3);
             double b = p.distanceSquaredToLine(centerVec - widthVec + lengthVec * 0.7,
                                                centerVec - widthVec * 0.75 + lengthVec * 0.15);
             double c =
                 p.distanceSquaredToLine(centerVec + widthVec * 0.75 + lengthVec * 0.15, centerVec + lengthVec * 0.3);
             double d = p.distanceSquaredToLine(centerVec + widthVec + lengthVec * 0.7,
                                                centerVec + widthVec * 0.75 + lengthVec * 0.15);
             return qSqrt(qMin(qMin(a, b), qMin(c, d)));
         }
     }
     return -1;
 }
 
 /* inherits documentation from base class */
 void QCPItemBracket::draw(QCPPainter *painter)
 {
     QCPVector2D leftVec(left->pixelPosition());
     QCPVector2D rightVec(right->pixelPosition());
     if (leftVec.toPoint() == rightVec.toPoint())
         return;
 
     QCPVector2D widthVec  = (rightVec - leftVec) * 0.5;
     QCPVector2D lengthVec = widthVec.perpendicular().normalized() * mLength;
     QCPVector2D centerVec = (rightVec + leftVec) * 0.5 - lengthVec;
 
     QPolygon boundingPoly;
     boundingPoly << leftVec.toPoint() << rightVec.toPoint() << (rightVec - lengthVec).toPoint()
                  << (leftVec - lengthVec).toPoint();
     QRect clip = clipRect().adjusted(-mainPen().widthF(), -mainPen().widthF(), mainPen().widthF(), mainPen().widthF());
     if (clip.intersects(boundingPoly.boundingRect()))
     {
         painter->setPen(mainPen());
         switch (mStyle)
         {
             case bsSquare:
             {
                 painter->drawLine((centerVec + widthVec).toPointF(), (centerVec - widthVec).toPointF());
                 painter->drawLine((centerVec + widthVec).toPointF(), (centerVec + widthVec + lengthVec).toPointF());
                 painter->drawLine((centerVec - widthVec).toPointF(), (centerVec - widthVec + lengthVec).toPointF());
                 break;
             }
             case bsRound:
             {
                 painter->setBrush(Qt::NoBrush);
                 QPainterPath path;
                 path.moveTo((centerVec + widthVec + lengthVec).toPointF());
                 path.cubicTo((centerVec + widthVec).toPointF(), (centerVec + widthVec).toPointF(),
                              centerVec.toPointF());
                 path.cubicTo((centerVec - widthVec).toPointF(), (centerVec - widthVec).toPointF(),
                              (centerVec - widthVec + lengthVec).toPointF());
                 painter->drawPath(path);
                 break;
             }
             case bsCurly:
             {
                 painter->setBrush(Qt::NoBrush);
                 QPainterPath path;
                 path.moveTo((centerVec + widthVec + lengthVec).toPointF());
                 path.cubicTo((centerVec + widthVec - lengthVec * 0.8).toPointF(),
                              (centerVec + 0.4 * widthVec + lengthVec).toPointF(), centerVec.toPointF());
                 path.cubicTo((centerVec - 0.4 * widthVec + lengthVec).toPointF(),
                              (centerVec - widthVec - lengthVec * 0.8).toPointF(),
                              (centerVec - widthVec + lengthVec).toPointF());
                 painter->drawPath(path);
                 break;
             }
             case bsCalligraphic:
             {
                 painter->setPen(Qt::NoPen);
                 painter->setBrush(QBrush(mainPen().color()));
                 QPainterPath path;
                 path.moveTo((centerVec + widthVec + lengthVec).toPointF());
 
                 path.cubicTo((centerVec + widthVec - lengthVec * 0.8).toPointF(),
                              (centerVec + 0.4 * widthVec + 0.8 * lengthVec).toPointF(), centerVec.toPointF());
                 path.cubicTo((centerVec - 0.4 * widthVec + 0.8 * lengthVec).toPointF(),
                              (centerVec - widthVec - lengthVec * 0.8).toPointF(),
                              (centerVec - widthVec + lengthVec).toPointF());
 
                 path.cubicTo((centerVec - widthVec - lengthVec * 0.5).toPointF(),
                              (centerVec - 0.2 * widthVec + 1.2 * lengthVec).toPointF(),
                              (centerVec + lengthVec * 0.2).toPointF());
                 path.cubicTo((centerVec + 0.2 * widthVec + 1.2 * lengthVec).toPointF(),
                              (centerVec + widthVec - lengthVec * 0.5).toPointF(),
                              (centerVec + widthVec + lengthVec).toPointF());
 
                 painter->drawPath(path);
                 break;
             }
         }
     }
 }
 
 /* inherits documentation from base class */
 QPointF QCPItemBracket::anchorPixelPosition(int anchorId) const
 {
     QCPVector2D leftVec(left->pixelPosition());
     QCPVector2D rightVec(right->pixelPosition());
     if (leftVec.toPoint() == rightVec.toPoint())
         return leftVec.toPointF();
 
     QCPVector2D widthVec  = (rightVec - leftVec) * 0.5;
     QCPVector2D lengthVec = widthVec.perpendicular().normalized() * mLength;
     QCPVector2D centerVec = (rightVec + leftVec) * 0.5 - lengthVec;
 
     switch (anchorId)
     {
         case aiCenter:
             return centerVec.toPointF();
     }
     qDebug() << Q_FUNC_INFO << "invalid anchorId" << anchorId;
     return QPointF();
 }
 
 /*! \internal
 
   Returns the pen that should be used for drawing lines. Returns mPen when the
   item is not selected and mSelectedPen when it is.
 */
 QPen QCPItemBracket::mainPen() const
 {
     return mSelected ? mSelectedPen : mPen;
 }
 /* end of 'src/items/item-bracket.cpp' */
diff --git a/kstars/auxiliary/qcustomplot.h b/kstars/auxiliary/qcustomplot.h
index 390461728..0dba2116e 100644
--- a/kstars/auxiliary/qcustomplot.h
+++ b/kstars/auxiliary/qcustomplot.h
@@ -1,7030 +1,7030 @@
 /***************************************************************************
 **                                                                        **
 **  QCustomPlot, an easy to use, modern plotting widget for Qt            **
 **  Copyright (C) 2011-2016 Emanuel Eichhammer                            **
 **                                                                        **
 **  This program is free software: you can redistribute it and/or modify  **
 **  it under the terms of the GNU General Public License as published by  **
 **  the Free Software Foundation, either version 3 of the License, or     **
 **  (at your option) any later version.                                   **
 **                                                                        **
 **  This program is distributed in the hope that it will be useful,       **
 **  but WITHOUT ANY WARRANTY; without even the implied warranty of        **
 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         **
 **  GNU General Public License for more details.                          **
 **                                                                        **
 **  You should have received a copy of the GNU General Public License     **
 **  along with this program.  If not, see http://www.gnu.org/licenses/.   **
 **                                                                        **
 ****************************************************************************
 **           Author: Emanuel Eichhammer                                   **
 **  Website/Contact: http://www.qcustomplot.com/                          **
 **             Date: 13.09.16                                             **
 **          Version: 2.0.0-beta                                           **
 ****************************************************************************/
 
 #ifndef QCUSTOMPLOT_H
 #define QCUSTOMPLOT_H
 
 #include <QtCore/qglobal.h>
 
 // some Qt version/configuration dependent macros to include or exclude certain code paths:
 #ifdef QCUSTOMPLOT_USE_OPENGL
 #if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
 #define QCP_OPENGL_PBUFFER
 #else
 #define QCP_OPENGL_FBO
 #endif
 #if QT_VERSION >= QT_VERSION_CHECK(5, 3, 0)
 #define QCP_OPENGL_OFFSCREENSURFACE
 #endif
 #endif
 
 #if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
 #define QCP_DEVICEPIXELRATIO_SUPPORTED
 #endif
 
 #include <QtCore/QObject>
 #include <QtCore/QPointer>
 #include <QtCore/QSharedPointer>
 #include <QtCore/QTimer>
 #include <QtGui/QPainter>
 #include <QtGui/QPaintEvent>
 #include <QtGui/QMouseEvent>
 #include <QtGui/QWheelEvent>
 #include <QtGui/QPixmap>
 #include <QtCore/QVector>
 #include <QtCore/QString>
 #include <QtCore/QDateTime>
 #include <QtCore/QMultiMap>
 #include <QtCore/QFlags>
 #include <QtCore/QDebug>
 #include <QtCore/QStack>
 #include <QtCore/QCache>
 #include <QtCore/QMargins>
 #include <qmath.h>
 #include <limits>
 #include <algorithm>
 #ifdef QCP_OPENGL_FBO
 #include <QtGui/QOpenGLContext>
 #include <QtGui/QOpenGLFramebufferObject>
 #ifdef QCP_OPENGL_OFFSCREENSURFACE
 #include <QtGui/QOffscreenSurface>
 #else
 #include <QtGui/QWindow>
 #endif
 #endif
 #ifdef QCP_OPENGL_PBUFFER
 #include <QtOpenGL/QGLPixelBuffer>
 #endif
 #if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
 #include <qnumeric.h>
 #include <QtGui/QWidget>
 #include <QtGui/QPrinter>
 #include <QtGui/QPrintEngine>
 #else
 #include <QtNumeric>
 #include <QtWidgets/QWidget>
 #include <QtPrintSupport/QtPrintSupport>
 #endif
 
 class QCPPainter;
 class QCustomPlot;
 class QCPLayerable;
 class QCPLayoutElement;
 class QCPLayout;
 class QCPAxis;
 class QCPAxisRect;
 class QCPAxisPainterPrivate;
 class QCPAbstractPlottable;
 class QCPGraph;
 class QCPAbstractItem;
 class QCPPlottableInterface1D;
 class QCPLegend;
 class QCPItemPosition;
 class QCPLayer;
 class QCPAbstractLegendItem;
 class QCPSelectionRect;
 class QCPColorMap;
 class QCPColorScale;
 class QCPBars;
 
 /* including file 'src/global.h', size 16131                                 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 // decl definitions for shared library compilation/usage:
 #if defined(QCUSTOMPLOT_COMPILE_LIBRARY)
 #define QCP_LIB_DECL Q_DECL_EXPORT
 #elif defined(QCUSTOMPLOT_USE_LIBRARY)
 #define QCP_LIB_DECL Q_DECL_IMPORT
 #else
 #define QCP_LIB_DECL
 #endif
 
 // define empty macro for override if it doesn't exist (Qt < 5)
 #ifndef override
 #define override
 #endif
 
 /*!
   The QCP Namespace contains general enums, QFlags and functions used throughout the QCustomPlot
   library.
 
   It provides QMetaObject-based reflection of its enums and flags via \a QCP::staticMetaObject.
 */
 #ifndef Q_MOC_RUN
 namespace QCP
 {
 #else
 class QCP // when in moc-run, make it look like a class, so we get Q_GADGET, Q_ENUM/Q_FLAGS features in namespace
 {
     Q_GADGET
     Q_ENUM(ExportPen)
     Q_ENUM(ResolutionUnit)
     Q_ENUM(SignDomain)
     Q_ENUM(MarginSide)
     Q_FLAGS(MarginSides)
     Q_ENUM(AntialiasedElement)
     Q_FLAGS(AntialiasedElements)
     Q_ENUM(PlottingHint)
     Q_FLAGS(PlottingHints)
     Q_ENUM(Interaction)
     Q_FLAGS(Interactions)
     Q_ENUM(SelectionRectMode)
     Q_ENUM(SelectionType)
   public:
 #endif
 
 /*!
   Defines the different units in which the image resolution can be specified in the export
   functions.
 
   \see QCustomPlot::savePng, QCustomPlot::saveJpg, QCustomPlot::saveBmp, QCustomPlot::saveRastered
 */
 enum ResolutionUnit
 {
     ruDotsPerMeter ///< Resolution is given in dots per meter (dpm)
     ,
     ruDotsPerCentimeter ///< Resolution is given in dots per centimeter (dpcm)
     ,
     ruDotsPerInch ///< Resolution is given in dots per inch (DPI/PPI)
 };
 
 /*!
   Defines how cosmetic pens (pens with numerical width 0) are handled during export.
 
   \see QCustomPlot::savePdf
 */
 enum ExportPen
 {
     epNoCosmetic ///< Cosmetic pens are converted to pens with pixel width 1 when exporting
     ,
     epAllowCosmetic ///< Cosmetic pens are exported normally (e.g. in PDF exports, cosmetic pens always appear as 1 pixel on screen, independent of viewer zoom level)
 };
 
 /*!
   Represents negative and positive sign domain, e.g. for passing to \ref
   QCPAbstractPlottable::getKeyRange and \ref QCPAbstractPlottable::getValueRange.
 
   This is primarily needed when working with logarithmic axis scales, since only one of the sign
   domains can be visible at a time.
 */
 enum SignDomain
 {
     sdNegative ///< The negative sign domain, i.e. numbers smaller than zero
     ,
     sdBoth ///< Both sign domains, including zero, i.e. all numbers
     ,
     sdPositive ///< The positive sign domain, i.e. numbers greater than zero
 };
 
 /*!
   Defines the sides of a rectangular entity to which margins can be applied.
 
   \see QCPLayoutElement::setAutoMargins, QCPAxisRect::setAutoMargins
 */
 enum MarginSide
 {
     msLeft = 0x01 ///< <tt>0x01</tt> left margin
     ,
     msRight = 0x02 ///< <tt>0x02</tt> right margin
     ,
     msTop = 0x04 ///< <tt>0x04</tt> top margin
     ,
     msBottom = 0x08 ///< <tt>0x08</tt> bottom margin
     ,
     msAll = 0xFF ///< <tt>0xFF</tt> all margins
     ,
     msNone = 0x00 ///< <tt>0x00</tt> no margin
 };
 Q_DECLARE_FLAGS(MarginSides, MarginSide)
 
 /*!
   Defines what objects of a plot can be forcibly drawn antialiased/not antialiased. If an object is
   neither forcibly drawn antialiased nor forcibly drawn not antialiased, it is up to the respective
   element how it is drawn. Typically it provides a \a setAntialiased function for this.
 
   \c AntialiasedElements is a flag of or-combined elements of this enum type.
 
   \see QCustomPlot::setAntialiasedElements, QCustomPlot::setNotAntialiasedElements
 */
 enum AntialiasedElement
 {
     aeAxes = 0x0001 ///< <tt>0x0001</tt> Axis base line and tick marks
     ,
     aeGrid = 0x0002 ///< <tt>0x0002</tt> Grid lines
     ,
     aeSubGrid = 0x0004 ///< <tt>0x0004</tt> Sub grid lines
     ,
     aeLegend = 0x0008 ///< <tt>0x0008</tt> Legend box
     ,
     aeLegendItems = 0x0010 ///< <tt>0x0010</tt> Legend items
     ,
     aePlottables = 0x0020 ///< <tt>0x0020</tt> Main lines of plottables
     ,
     aeItems = 0x0040 ///< <tt>0x0040</tt> Main lines of items
     ,
     aeScatters = 0x0080 ///< <tt>0x0080</tt> Scatter symbols of plottables (excluding scatter symbols of type ssPixmap)
     ,
     aeFills = 0x0100 ///< <tt>0x0100</tt> Borders of fills (e.g. under or between graphs)
     ,
     aeZeroLine = 0x0200 ///< <tt>0x0200</tt> Zero-lines, see \ref QCPGrid::setZeroLinePen
     ,
     aeOther = 0x8000 ///< <tt>0x8000</tt> Other elements that don't fit into any of the existing categories
     ,
     aeAll = 0xFFFF ///< <tt>0xFFFF</tt> All elements
     ,
     aeNone = 0x0000 ///< <tt>0x0000</tt> No elements
 };
 Q_DECLARE_FLAGS(AntialiasedElements, AntialiasedElement)
 
 /*!
   Defines plotting hints that control various aspects of the quality and speed of plotting.
 
   \see QCustomPlot::setPlottingHints
 */
 enum PlottingHint
 {
     phNone = 0x000 ///< <tt>0x000</tt> No hints are set
     ,
     phFastPolylines =
         0x001 ///< <tt>0x001</tt> Graph/Curve lines are drawn with a faster method. This reduces the quality especially of the line segment
     ///<                joins, thus is most effective for pen sizes larger than 1. It is only used for solid line pens.
     ,
     phImmediateRefresh =
         0x002 ///< <tt>0x002</tt> causes an immediate repaint() instead of a soft update() when QCustomPlot::replot() is called with parameter \ref QCustomPlot::rpRefreshHint.
     ///<                This is set by default to prevent the plot from freezing on fast consecutive replots (e.g. user drags ranges with mouse).
     ,
     phCacheLabels =
         0x004 ///< <tt>0x004</tt> axis (tick) labels will be cached as pixmaps, increasing replot performance.
 };
 Q_DECLARE_FLAGS(PlottingHints, PlottingHint)
 
 /*!
   Defines the mouse interactions possible with QCustomPlot.
 
   \c Interactions is a flag of or-combined elements of this enum type.
 
   \see QCustomPlot::setInteractions
 */
 enum Interaction
 {
     iRangeDrag =
         0x001 ///< <tt>0x001</tt> Axis ranges are draggable (see \ref QCPAxisRect::setRangeDrag, \ref QCPAxisRect::setRangeDragAxes)
     ,
     iRangeZoom =
         0x002 ///< <tt>0x002</tt> Axis ranges are zoomable with the mouse wheel (see \ref QCPAxisRect::setRangeZoom, \ref QCPAxisRect::setRangeZoomAxes)
     ,
     iMultiSelect =
         0x004 ///< <tt>0x004</tt> The user can select multiple objects by holding the modifier set by \ref QCustomPlot::setMultiSelectModifier while clicking
     ,
     iSelectPlottables =
         0x008 ///< <tt>0x008</tt> Plottables are selectable (e.g. graphs, curves, bars,... see QCPAbstractPlottable)
     ,
     iSelectAxes = 0x010 ///< <tt>0x010</tt> Axes are selectable (or parts of them, see QCPAxis::setSelectableParts)
     ,
     iSelectLegend =
         0x020 ///< <tt>0x020</tt> Legends are selectable (or their child items, see QCPLegend::setSelectableParts)
     ,
     iSelectItems =
         0x040 ///< <tt>0x040</tt> Items are selectable (Rectangles, Arrows, Textitems, etc. see \ref QCPAbstractItem)
     ,
     iSelectOther =
         0x080 ///< <tt>0x080</tt> All other objects are selectable (e.g. your own derived layerables, other layout elements,...)
 };
 Q_DECLARE_FLAGS(Interactions, Interaction)
 
 /*!
   Defines the behaviour of the selection rect.
 
   \see QCustomPlot::setSelectionRectMode, QCustomPlot::selectionRect, QCPSelectionRect
 */
 enum SelectionRectMode
 {
     srmNone ///< The selection rect is disabled, and all mouse events are forwarded to the underlying objects, e.g. for axis range dragging
     ,
     srmZoom ///< When dragging the mouse, a selection rect becomes active. Upon releasing, the axes that are currently set as range zoom axes (\ref QCPAxisRect::setRangeZoomAxes) will have their ranges zoomed accordingly.
     ,
     srmSelect ///< When dragging the mouse, a selection rect becomes active. Upon releasing, plottable data points that were within the selection rect are selected, if the plottable's selectability setting permits. (See  \ref dataselection "data selection mechanism" for details.)
     ,
     srmCustom ///< When dragging the mouse, a selection rect becomes active. It is the programmer's responsibility to connect according slots to the selection rect's signals (e.g. \ref QCPSelectionRect::accepted) in order to process the user interaction.
 };
 
 /*!
   Defines the different ways a plottable can be selected. These images show the effect of the
   different selection types, when the indicated selection rect was dragged:
 
   <center>
   <table>
   <tr>
     <td>\image html selectiontype-none.png stNone</td>
     <td>\image html selectiontype-whole.png stWhole</td>
     <td>\image html selectiontype-singledata.png stSingleData</td>
     <td>\image html selectiontype-datarange.png stDataRange</td>
     <td>\image html selectiontype-multipledataranges.png stMultipleDataRanges</td>
   </tr>
   </table>
   </center>
 
   \see QCPAbstractPlottable::setSelectable, QCPDataSelection::enforceType
 */
 enum SelectionType
 {
     stNone ///< The plottable is not selectable
     ,
     stWhole ///< Selection behaves like \ref stMultipleDataRanges, but if there are any data points selected, the entire plottable is drawn as selected.
     ,
     stSingleData ///< One individual data point can be selected at a time
     ,
     stDataRange ///< Multiple contiguous data points (a data range) can be selected
     ,
     stMultipleDataRanges ///< Any combination of data points/ranges can be selected
 };
 
 /*! \internal
 
   Returns whether the specified \a value is considered an invalid data value for plottables (i.e.
   is \e nan or \e +/-inf). This function is used to check data validity upon replots, when the
   compiler flag \c QCUSTOMPLOT_CHECK_DATA is set.
 */
 inline bool isInvalidData(double value)
 {
     return qIsNaN(value) || qIsInf(value);
 }
 
 /*! \internal
   \overload
 
   Checks two arguments instead of one.
 */
 inline bool isInvalidData(double value1, double value2)
 {
     return isInvalidData(value1) || isInvalidData(value2);
 }
 
 /*! \internal
 
   Sets the specified \a side of \a margins to \a value
 
   \see getMarginValue
 */
 inline void setMarginValue(QMargins &margins, QCP::MarginSide side, int value)
 {
     switch (side)
     {
         case QCP::msLeft:
             margins.setLeft(value);
             break;
         case QCP::msRight:
             margins.setRight(value);
             break;
         case QCP::msTop:
             margins.setTop(value);
             break;
         case QCP::msBottom:
             margins.setBottom(value);
             break;
         case QCP::msAll:
             margins = QMargins(value, value, value, value);
             break;
         default:
             break;
     }
 }
 
 /*! \internal
 
   Returns the value of the specified \a side of \a margins. If \a side is \ref QCP::msNone or
   \ref QCP::msAll, returns 0.
 
   \see setMarginValue
 */
 inline int getMarginValue(const QMargins &margins, QCP::MarginSide side)
 {
     switch (side)
     {
         case QCP::msLeft:
             return margins.left();
         case QCP::msRight:
             return margins.right();
         case QCP::msTop:
             return margins.top();
         case QCP::msBottom:
             return margins.bottom();
         default:
             break;
     }
     return 0;
 }
 
 extern const QMetaObject
     staticMetaObject; // in moc-run we create a static meta object for QCP "fake" object. This line is the link to it via QCP::staticMetaObject in normal operation as namespace
 
 } // end of namespace QCP
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::AntialiasedElements)
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::PlottingHints)
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::MarginSides)
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::Interactions)
 Q_DECLARE_METATYPE(QCP::ExportPen)
 Q_DECLARE_METATYPE(QCP::ResolutionUnit)
 Q_DECLARE_METATYPE(QCP::SignDomain)
 Q_DECLARE_METATYPE(QCP::MarginSide)
 Q_DECLARE_METATYPE(QCP::AntialiasedElement)
 Q_DECLARE_METATYPE(QCP::PlottingHint)
 Q_DECLARE_METATYPE(QCP::Interaction)
 Q_DECLARE_METATYPE(QCP::SelectionRectMode)
 Q_DECLARE_METATYPE(QCP::SelectionType)
 
 /* end of 'src/global.h' */
 
 /* including file 'src/vector2d.h', size 4928                                */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPVector2D
 {
   public:
     QCPVector2D();
     QCPVector2D(double x, double y);
     QCPVector2D(const QPoint &point);
     QCPVector2D(const QPointF &point);
 
     // getters:
     double x() const { return mX; }
     double y() const { return mY; }
     double &rx() { return mX; }
     double &ry() { return mY; }
 
     // setters:
     void setX(double x) { mX = x; }
     void setY(double y) { mY = y; }
 
     // non-virtual methods:
     double length() const { return qSqrt(mX * mX + mY * mY); }
     double lengthSquared() const { return mX * mX + mY * mY; }
     QPoint toPoint() const { return QPoint(mX, mY); }
     QPointF toPointF() const { return QPointF(mX, mY); }
 
     bool isNull() const { return qIsNull(mX) && qIsNull(mY); }
     void normalize();
     QCPVector2D normalized() const;
     QCPVector2D perpendicular() const { return QCPVector2D(-mY, mX); }
     double dot(const QCPVector2D &vec) const { return mX * vec.mX + mY * vec.mY; }
     double distanceSquaredToLine(const QCPVector2D &start, const QCPVector2D &end) const;
     double distanceSquaredToLine(const QLineF &line) const;
     double distanceToStraightLine(const QCPVector2D &base, const QCPVector2D &direction) const;
 
     QCPVector2D &operator*=(double factor);
     QCPVector2D &operator/=(double divisor);
     QCPVector2D &operator+=(const QCPVector2D &vector);
     QCPVector2D &operator-=(const QCPVector2D &vector);
 
   private:
     // property members:
     double mX, mY;
 
     friend inline const QCPVector2D operator*(double factor, const QCPVector2D &vec);
     friend inline const QCPVector2D operator*(const QCPVector2D &vec, double factor);
     friend inline const QCPVector2D operator/(const QCPVector2D &vec, double divisor);
     friend inline const QCPVector2D operator+(const QCPVector2D &vec1, const QCPVector2D &vec2);
     friend inline const QCPVector2D operator-(const QCPVector2D &vec1, const QCPVector2D &vec2);
     friend inline const QCPVector2D operator-(const QCPVector2D &vec);
 };
 Q_DECLARE_TYPEINFO(QCPVector2D, Q_MOVABLE_TYPE);
 
 inline const QCPVector2D operator*(double factor, const QCPVector2D &vec)
 {
     return QCPVector2D(vec.mX * factor, vec.mY * factor);
 }
 inline const QCPVector2D operator*(const QCPVector2D &vec, double factor)
 {
     return QCPVector2D(vec.mX * factor, vec.mY * factor);
 }
 inline const QCPVector2D operator/(const QCPVector2D &vec, double divisor)
 {
     return QCPVector2D(vec.mX / divisor, vec.mY / divisor);
 }
 inline const QCPVector2D operator+(const QCPVector2D &vec1, const QCPVector2D &vec2)
 {
     return QCPVector2D(vec1.mX + vec2.mX, vec1.mY + vec2.mY);
 }
 inline const QCPVector2D operator-(const QCPVector2D &vec1, const QCPVector2D &vec2)
 {
     return QCPVector2D(vec1.mX - vec2.mX, vec1.mY - vec2.mY);
 }
 inline const QCPVector2D operator-(const QCPVector2D &vec)
 {
     return QCPVector2D(-vec.mX, -vec.mY);
 }
 
 /*! \relates QCPVector2D
 
   Prints \a vec in a human readable format to the qDebug output.
 */
 inline QDebug operator<<(QDebug d, const QCPVector2D &vec)
 {
     d.nospace() << "QCPVector2D(" << vec.x() << ", " << vec.y() << ")";
     return d.space();
 }
 
 /* end of 'src/vector2d.h' */
 
 /* including file 'src/painter.h', size 4035                                 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPPainter : public QPainter
 {
     Q_GADGET
   public:
     /*!
           Defines special modes the painter can operate in. They disable or enable certain subsets of features/fixes/workarounds,
           depending on whether they are wanted on the respective output device.
         */
     enum PainterMode
     {
         pmDefault = 0x00 ///< <tt>0x00</tt> Default mode for painting on screen devices
         ,
         pmVectorized =
             0x01 ///< <tt>0x01</tt> Mode for vectorized painting (e.g. PDF export). For example, this prevents some antialiasing fixes.
         ,
         pmNoCaching =
             0x02 ///< <tt>0x02</tt> Mode for all sorts of exports (e.g. PNG, PDF,...). For example, this prevents using cached pixmap labels
         ,
         pmNonCosmetic =
             0x04 ///< <tt>0x04</tt> Turns pen widths 0 to 1, i.e. disables cosmetic pens. (A cosmetic pen is always drawn with width 1 pixel in the vector image/pdf viewer, independent of zoom.)
     };
     Q_ENUM(PainterMode)
     Q_FLAGS(PainterModes)
     Q_DECLARE_FLAGS(PainterModes, PainterMode)
 
     QCPPainter();
     explicit QCPPainter(QPaintDevice *device);
 
     // getters:
     bool antialiasing() const { return testRenderHint(QPainter::Antialiasing); }
     PainterModes modes() const { return mModes; }
 
     // setters:
     void setAntialiasing(bool enabled);
     void setMode(PainterMode mode, bool enabled = true);
     void setModes(PainterModes modes);
 
     // methods hiding non-virtual base class functions (QPainter bug workarounds):
     bool begin(QPaintDevice *device);
     void setPen(const QPen &pen);
     void setPen(const QColor &color);
     void setPen(Qt::PenStyle penStyle);
     void drawLine(const QLineF &line);
     void drawLine(const QPointF &p1, const QPointF &p2) { drawLine(QLineF(p1, p2)); }
     void save();
     void restore();
 
     // non-virtual methods:
     void makeNonCosmetic();
 
   protected:
     // property members:
     PainterModes mModes;
     bool mIsAntialiasing;
 
     // non-property members:
     QStack<bool> mAntialiasingStack;
 };
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCPPainter::PainterModes)
 Q_DECLARE_METATYPE(QCPPainter::PainterMode)
 
 /* end of 'src/painter.h' */
 
 /* including file 'src/paintbuffer.h', size 4958                             */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAbstractPaintBuffer
 {
   public:
     explicit QCPAbstractPaintBuffer(const QSize &size, double devicePixelRatio);
     virtual ~QCPAbstractPaintBuffer();
 
     // getters:
     QSize size() const { return mSize; }
     bool invalidated() const { return mInvalidated; }
     double devicePixelRatio() const { return mDevicePixelRatio; }
 
     // setters:
     void setSize(const QSize &size);
     void setInvalidated(bool invalidated = true);
     void setDevicePixelRatio(double ratio);
 
     // introduced virtual methods:
     virtual QCPPainter *startPainting() = 0;
     virtual void donePainting() {}
     virtual void draw(QCPPainter *painter) const = 0;
     virtual void clear(const QColor &color)      = 0;
 
   protected:
     // property members:
     QSize mSize;
     double mDevicePixelRatio;
 
     // non-property members:
     bool mInvalidated;
 
     // introduced virtual methods:
     virtual void reallocateBuffer() = 0;
 };
 
 class QCP_LIB_DECL QCPPaintBufferPixmap : public QCPAbstractPaintBuffer
 {
   public:
     explicit QCPPaintBufferPixmap(const QSize &size, double devicePixelRatio);
     ~QCPPaintBufferPixmap() override;
 
     // reimplemented virtual methods:
     QCPPainter *startPainting() override;
     void draw(QCPPainter *painter) const override;
     void clear(const QColor &color) override;
 
   protected:
     // non-property members:
     QPixmap mBuffer;
 
     // reimplemented virtual methods:
     void reallocateBuffer() override;
 };
 
 #ifdef QCP_OPENGL_PBUFFER
 class QCP_LIB_DECL QCPPaintBufferGlPbuffer : public QCPAbstractPaintBuffer
 {
   public:
     explicit QCPPaintBufferGlPbuffer(const QSize &size, double devicePixelRatio, int multisamples);
     virtual ~QCPPaintBufferGlPbuffer();
 
     // reimplemented virtual methods:
     virtual QCPPainter *startPainting() override;
     virtual void draw(QCPPainter *painter) const override;
     void clear(const QColor &color) override;
 
   protected:
     // non-property members:
     QGLPixelBuffer *mGlPBuffer;
     int mMultisamples;
 
     // reimplemented virtual methods:
     virtual void reallocateBuffer() override;
 };
 #endif // QCP_OPENGL_PBUFFER
 
 #ifdef QCP_OPENGL_FBO
 class QCP_LIB_DECL QCPPaintBufferGlFbo : public QCPAbstractPaintBuffer
 {
   public:
     explicit QCPPaintBufferGlFbo(const QSize &size, double devicePixelRatio, QWeakPointer<QOpenGLContext> glContext,
                                  QWeakPointer<QOpenGLPaintDevice> glPaintDevice);
     virtual ~QCPPaintBufferGlFbo();
 
     // reimplemented virtual methods:
     virtual QCPPainter *startPainting() override;
     virtual void donePainting() override;
     virtual void draw(QCPPainter *painter) const override;
     void clear(const QColor &color) override;
 
   protected:
     // non-property members:
     QWeakPointer<QOpenGLContext> mGlContext;
     QWeakPointer<QOpenGLPaintDevice> mGlPaintDevice;
     QOpenGLFramebufferObject *mGlFrameBuffer;
 
     // reimplemented virtual methods:
     virtual void reallocateBuffer() override;
 };
 #endif // QCP_OPENGL_FBO
 
 /* end of 'src/paintbuffer.h' */
 
 /* including file 'src/layer.h', size 6885                                   */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPLayer : public QObject
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QCustomPlot *parentPlot READ parentPlot)
     Q_PROPERTY(QString name READ name)
     Q_PROPERTY(int index READ index)
     Q_PROPERTY(QList<QCPLayerable *> children READ children)
     Q_PROPERTY(bool visible READ visible WRITE setVisible)
     Q_PROPERTY(LayerMode mode READ mode WRITE setMode)
     /// \endcond
   public:
     /*!
           Defines the different rendering modes of a layer. Depending on the mode, certain layers can be
           replotted individually, without the need to replot (possibly complex) layerables on other
           layers.
 
           \see setMode
         */
     enum LayerMode
     {
         lmLogical ///< Layer is used only for rendering order, and shares paint buffer with all other adjacent logical layers.
         ,
         lmBuffered ///< Layer has its own paint buffer and may be replotted individually (see \ref replot).
     };
     Q_ENUM(LayerMode)
 
     QCPLayer(QCustomPlot *parentPlot, const QString &layerName);
     ~QCPLayer() override;
 
     // getters:
     QCustomPlot *parentPlot() const { return mParentPlot; }
     QString name() const { return mName; }
     int index() const { return mIndex; }
     QList<QCPLayerable *> children() const { return mChildren; }
     bool visible() const { return mVisible; }
     LayerMode mode() const { return mMode; }
 
     // setters:
     void setVisible(bool visible);
     void setMode(LayerMode mode);
 
     // non-virtual methods:
     void replot();
 
   protected:
     // property members:
     QCustomPlot *mParentPlot;
     QString mName;
     int mIndex;
     QList<QCPLayerable *> mChildren;
     bool mVisible;
     LayerMode mMode;
 
     // non-property members:
     QWeakPointer<QCPAbstractPaintBuffer> mPaintBuffer;
 
     // non-virtual methods:
     void draw(QCPPainter *painter);
     void drawToPaintBuffer();
     void addChild(QCPLayerable *layerable, bool prepend);
     void removeChild(QCPLayerable *layerable);
 
   private:
     Q_DISABLE_COPY(QCPLayer)
 
     friend class QCustomPlot;
     friend class QCPLayerable;
 };
 Q_DECLARE_METATYPE(QCPLayer::LayerMode)
 
 class QCP_LIB_DECL QCPLayerable : public QObject
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(bool visible READ visible WRITE setVisible)
     Q_PROPERTY(QCustomPlot *parentPlot READ parentPlot)
     Q_PROPERTY(QCPLayerable *parentLayerable READ parentLayerable)
     Q_PROPERTY(QCPLayer *layer READ layer WRITE setLayer NOTIFY layerChanged)
     Q_PROPERTY(bool antialiased READ antialiased WRITE setAntialiased)
     /// \endcond
   public:
-    QCPLayerable(QCustomPlot *plot, QString targetLayer = QString(), QCPLayerable *parentLayerable = 0);
+    QCPLayerable(QCustomPlot *plot, QString targetLayer = QString(), QCPLayerable *parentLayerable = nullptr);
     ~QCPLayerable() override;
 
     // getters:
     bool visible() const { return mVisible; }
     QCustomPlot *parentPlot() const { return mParentPlot; }
     QCPLayerable *parentLayerable() const { return mParentLayerable.data(); }
     QCPLayer *layer() const { return mLayer; }
     bool antialiased() const { return mAntialiased; }
 
     // setters:
     void setVisible(bool on);
     Q_SLOT bool setLayer(QCPLayer *layer);
     bool setLayer(const QString &layerName);
     void setAntialiased(bool enabled);
 
     // introduced virtual methods:
-    virtual double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const;
+    virtual double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const;
 
     // non-property methods:
     bool realVisibility() const;
 
   signals:
     void layerChanged(QCPLayer *newLayer);
 
   protected:
     // property members:
     bool mVisible;
     QCustomPlot *mParentPlot;
     QPointer<QCPLayerable> mParentLayerable;
     QCPLayer *mLayer;
     bool mAntialiased;
 
     // introduced virtual methods:
     virtual void parentPlotInitialized(QCustomPlot *parentPlot);
     virtual QCP::Interaction selectionCategory() const;
     virtual QRect clipRect() const;
     virtual void applyDefaultAntialiasingHint(QCPPainter *painter) const = 0;
     virtual void draw(QCPPainter *painter)                               = 0;
     // selection events:
     virtual void selectEvent(QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged);
     virtual void deselectEvent(bool *selectionStateChanged);
     // low-level mouse events:
     virtual void mousePressEvent(QMouseEvent *event, const QVariant &details);
     virtual void mouseMoveEvent(QMouseEvent *event, const QPointF &startPos);
     virtual void mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos);
     virtual void mouseDoubleClickEvent(QMouseEvent *event, const QVariant &details);
     virtual void wheelEvent(QWheelEvent *event);
 
     // non-property methods:
     void initializeParentPlot(QCustomPlot *parentPlot);
     void setParentLayerable(QCPLayerable *parentLayerable);
     bool moveToLayer(QCPLayer *layer, bool prepend);
     void applyAntialiasingHint(QCPPainter *painter, bool localAntialiased,
                                QCP::AntialiasedElement overrideElement) const;
 
   private:
     Q_DISABLE_COPY(QCPLayerable)
 
     friend class QCustomPlot;
     friend class QCPLayer;
     friend class QCPAxisRect;
 };
 
 /* end of 'src/layer.h' */
 
 /* including file 'src/axis/range.h', size 5280                              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPRange
 {
   public:
     double lower, upper;
 
     QCPRange();
     QCPRange(double lower, double upper);
 
     bool operator==(const QCPRange &other) const { return lower == other.lower && upper == other.upper; }
     bool operator!=(const QCPRange &other) const { return !(*this == other); }
 
     QCPRange &operator+=(const double &value)
     {
         lower += value;
         upper += value;
         return *this;
     }
     QCPRange &operator-=(const double &value)
     {
         lower -= value;
         upper -= value;
         return *this;
     }
     QCPRange &operator*=(const double &value)
     {
         lower *= value;
         upper *= value;
         return *this;
     }
     QCPRange &operator/=(const double &value)
     {
         lower /= value;
         upper /= value;
         return *this;
     }
     friend inline const QCPRange operator+(const QCPRange &, double);
     friend inline const QCPRange operator+(double, const QCPRange &);
     friend inline const QCPRange operator-(const QCPRange &range, double value);
     friend inline const QCPRange operator*(const QCPRange &range, double value);
     friend inline const QCPRange operator*(double value, const QCPRange &range);
     friend inline const QCPRange operator/(const QCPRange &range, double value);
 
     double size() const { return upper - lower; }
     double center() const { return (upper + lower) * 0.5; }
     void normalize()
     {
         if (lower > upper)
             qSwap(lower, upper);
     }
     void expand(const QCPRange &otherRange);
     void expand(double includeCoord);
     QCPRange expanded(const QCPRange &otherRange) const;
     QCPRange expanded(double includeCoord) const;
     QCPRange bounded(double lowerBound, double upperBound) const;
     QCPRange sanitizedForLogScale() const;
     QCPRange sanitizedForLinScale() const;
     bool contains(double value) const { return value >= lower && value <= upper; }
 
     static bool validRange(double lower, double upper);
     static bool validRange(const QCPRange &range);
     static const double minRange;
     static const double maxRange;
 };
 Q_DECLARE_TYPEINFO(QCPRange, Q_MOVABLE_TYPE);
 
 /*! \relates QCPRange
 
   Prints \a range in a human readable format to the qDebug output.
 */
 inline QDebug operator<<(QDebug d, const QCPRange &range)
 {
     d.nospace() << "QCPRange(" << range.lower << ", " << range.upper << ")";
     return d.space();
 }
 
 /*!
   Adds \a value to both boundaries of the range.
 */
 inline const QCPRange operator+(const QCPRange &range, double value)
 {
     QCPRange result(range);
     result += value;
     return result;
 }
 
 /*!
   Adds \a value to both boundaries of the range.
 */
 inline const QCPRange operator+(double value, const QCPRange &range)
 {
     QCPRange result(range);
     result += value;
     return result;
 }
 
 /*!
   Subtracts \a value from both boundaries of the range.
 */
 inline const QCPRange operator-(const QCPRange &range, double value)
 {
     QCPRange result(range);
     result -= value;
     return result;
 }
 
 /*!
   Multiplies both boundaries of the range by \a value.
 */
 inline const QCPRange operator*(const QCPRange &range, double value)
 {
     QCPRange result(range);
     result *= value;
     return result;
 }
 
 /*!
   Multiplies both boundaries of the range by \a value.
 */
 inline const QCPRange operator*(double value, const QCPRange &range)
 {
     QCPRange result(range);
     result *= value;
     return result;
 }
 
 /*!
   Divides both boundaries of the range by \a value.
 */
 inline const QCPRange operator/(const QCPRange &range, double value)
 {
     QCPRange result(range);
     result /= value;
     return result;
 }
 
 /* end of 'src/axis/range.h' */
 
 /* including file 'src/selection.h', size 8579                               */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPDataRange
 {
   public:
     QCPDataRange();
     QCPDataRange(int begin, int end);
 
     bool operator==(const QCPDataRange &other) const { return mBegin == other.mBegin && mEnd == other.mEnd; }
     bool operator!=(const QCPDataRange &other) const { return !(*this == other); }
 
     // getters:
     int begin() const { return mBegin; }
     int end() const { return mEnd; }
     int size() const { return mEnd - mBegin; }
     int length() const { return size(); }
 
     // setters:
     void setBegin(int begin) { mBegin = begin; }
     void setEnd(int end) { mEnd = end; }
 
     // non-property methods:
     bool isValid() const { return (mEnd >= mBegin) && (mBegin >= 0); }
     bool isEmpty() const { return length() == 0; }
     QCPDataRange bounded(const QCPDataRange &other) const;
     QCPDataRange expanded(const QCPDataRange &other) const;
     QCPDataRange intersection(const QCPDataRange &other) const;
     QCPDataRange adjusted(int changeBegin, int changeEnd) const
     {
         return QCPDataRange(mBegin + changeBegin, mEnd + changeEnd);
     }
     bool intersects(const QCPDataRange &other) const;
     bool contains(const QCPDataRange &other) const;
 
   private:
     // property members:
     int mBegin, mEnd;
 };
 Q_DECLARE_TYPEINFO(QCPDataRange, Q_MOVABLE_TYPE);
 
 class QCP_LIB_DECL QCPDataSelection
 {
   public:
     explicit QCPDataSelection();
     explicit QCPDataSelection(const QCPDataRange &range);
 
     bool operator==(const QCPDataSelection &other) const;
     bool operator!=(const QCPDataSelection &other) const { return !(*this == other); }
     QCPDataSelection &operator+=(const QCPDataSelection &other);
     QCPDataSelection &operator+=(const QCPDataRange &other);
     QCPDataSelection &operator-=(const QCPDataSelection &other);
     QCPDataSelection &operator-=(const QCPDataRange &other);
     friend inline const QCPDataSelection operator+(const QCPDataSelection &a, const QCPDataSelection &b);
     friend inline const QCPDataSelection operator+(const QCPDataRange &a, const QCPDataSelection &b);
     friend inline const QCPDataSelection operator+(const QCPDataSelection &a, const QCPDataRange &b);
     friend inline const QCPDataSelection operator+(const QCPDataRange &a, const QCPDataRange &b);
     friend inline const QCPDataSelection operator-(const QCPDataSelection &a, const QCPDataSelection &b);
     friend inline const QCPDataSelection operator-(const QCPDataRange &a, const QCPDataSelection &b);
     friend inline const QCPDataSelection operator-(const QCPDataSelection &a, const QCPDataRange &b);
     friend inline const QCPDataSelection operator-(const QCPDataRange &a, const QCPDataRange &b);
 
     // getters:
     int dataRangeCount() const { return mDataRanges.size(); }
     int dataPointCount() const;
     QCPDataRange dataRange(int index = 0) const;
     QList<QCPDataRange> dataRanges() const { return mDataRanges; }
     QCPDataRange span() const;
 
     // non-property methods:
     void addDataRange(const QCPDataRange &dataRange, bool simplify = true);
     void clear();
     bool isEmpty() const { return mDataRanges.isEmpty(); }
     void simplify();
     void enforceType(QCP::SelectionType type);
     bool contains(const QCPDataSelection &other) const;
     QCPDataSelection intersection(const QCPDataRange &other) const;
     QCPDataSelection intersection(const QCPDataSelection &other) const;
     QCPDataSelection inverse(const QCPDataRange &outerRange) const;
 
   private:
     // property members:
     QList<QCPDataRange> mDataRanges;
 
     inline static bool lessThanDataRangeBegin(const QCPDataRange &a, const QCPDataRange &b)
     {
         return a.begin() < b.begin();
     }
 };
 Q_DECLARE_METATYPE(QCPDataSelection)
 
 /*!
   Return a \ref QCPDataSelection with the data points in \a a joined with the data points in \a b.
   The resulting data selection is already simplified (see \ref QCPDataSelection::simplify).
 */
 inline const QCPDataSelection operator+(const QCPDataSelection &a, const QCPDataSelection &b)
 {
     QCPDataSelection result(a);
     result += b;
     return result;
 }
 
 /*!
   Return a \ref QCPDataSelection with the data points in \a a joined with the data points in \a b.
   The resulting data selection is already simplified (see \ref QCPDataSelection::simplify).
 */
 inline const QCPDataSelection operator+(const QCPDataRange &a, const QCPDataSelection &b)
 {
     QCPDataSelection result(a);
     result += b;
     return result;
 }
 
 /*!
   Return a \ref QCPDataSelection with the data points in \a a joined with the data points in \a b.
   The resulting data selection is already simplified (see \ref QCPDataSelection::simplify).
 */
 inline const QCPDataSelection operator+(const QCPDataSelection &a, const QCPDataRange &b)
 {
     QCPDataSelection result(a);
     result += b;
     return result;
 }
 
 /*!
   Return a \ref QCPDataSelection with the data points in \a a joined with the data points in \a b.
   The resulting data selection is already simplified (see \ref QCPDataSelection::simplify).
 */
 inline const QCPDataSelection operator+(const QCPDataRange &a, const QCPDataRange &b)
 {
     QCPDataSelection result(a);
     result += b;
     return result;
 }
 
 /*!
   Return a \ref QCPDataSelection with the data points which are in \a a but not in \a b.
 */
 inline const QCPDataSelection operator-(const QCPDataSelection &a, const QCPDataSelection &b)
 {
     QCPDataSelection result(a);
     result -= b;
     return result;
 }
 
 /*!
   Return a \ref QCPDataSelection with the data points which are in \a a but not in \a b.
 */
 inline const QCPDataSelection operator-(const QCPDataRange &a, const QCPDataSelection &b)
 {
     QCPDataSelection result(a);
     result -= b;
     return result;
 }
 
 /*!
   Return a \ref QCPDataSelection with the data points which are in \a a but not in \a b.
 */
 inline const QCPDataSelection operator-(const QCPDataSelection &a, const QCPDataRange &b)
 {
     QCPDataSelection result(a);
     result -= b;
     return result;
 }
 
 /*!
   Return a \ref QCPDataSelection with the data points which are in \a a but not in \a b.
 */
 inline const QCPDataSelection operator-(const QCPDataRange &a, const QCPDataRange &b)
 {
     QCPDataSelection result(a);
     result -= b;
     return result;
 }
 
 /*! \relates QCPDataRange
 
   Prints \a dataRange in a human readable format to the qDebug output.
 */
 inline QDebug operator<<(QDebug d, const QCPDataRange &dataRange)
 {
     d.nospace() << "[" << dataRange.begin() << ".." << dataRange.end() - 1 << "]";
     return d.space();
 }
 
 /*! \relates QCPDataSelection
 
   Prints \a selection in a human readable format to the qDebug output.
 */
 inline QDebug operator<<(QDebug d, const QCPDataSelection &selection)
 {
     d.nospace() << "QCPDataSelection(";
     for (int i = 0; i < selection.dataRangeCount(); ++i)
     {
         if (i != 0)
             d << ", ";
         d << selection.dataRange(i);
     }
     d << ")";
     return d.space();
 }
 
 /* end of 'src/selection.h' */
 
 /* including file 'src/selectionrect.h', size 3338                           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPSelectionRect : public QCPLayerable
 {
     Q_OBJECT
   public:
     explicit QCPSelectionRect(QCustomPlot *parentPlot);
     ~QCPSelectionRect() override;
 
     // getters:
     QRect rect() const { return mRect; }
     QCPRange range(const QCPAxis *axis) const;
     QPen pen() const { return mPen; }
     QBrush brush() const { return mBrush; }
     bool isActive() const { return mActive; }
 
     // setters:
     void setPen(const QPen &pen);
     void setBrush(const QBrush &brush);
 
     // non-property methods:
     Q_SLOT void cancel();
 
   signals:
     void started(QMouseEvent *event);
     void changed(const QRect &rect, QMouseEvent *event);
     void canceled(const QRect &rect, QInputEvent *event);
     void accepted(const QRect &rect, QMouseEvent *event);
 
   protected:
     // property members:
     QRect mRect;
     QPen mPen;
     QBrush mBrush;
     // non-property members:
     bool mActive;
 
     // introduced virtual methods:
     virtual void startSelection(QMouseEvent *event);
     virtual void moveSelection(QMouseEvent *event);
     virtual void endSelection(QMouseEvent *event);
     virtual void keyPressEvent(QKeyEvent *event);
 
     // reimplemented virtual methods
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     void draw(QCPPainter *painter) override;
 
     friend class QCustomPlot;
 };
 
 /* end of 'src/selectionrect.h' */
 
 /* including file 'src/layout.h', size 13128                                 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPMarginGroup : public QObject
 {
     Q_OBJECT
   public:
     explicit QCPMarginGroup(QCustomPlot *parentPlot);
     ~QCPMarginGroup() override;
 
     // non-virtual methods:
     QList<QCPLayoutElement *> elements(QCP::MarginSide side) const { return mChildren.value(side); }
     bool isEmpty() const;
     void clear();
 
   protected:
     // non-property members:
     QCustomPlot *mParentPlot;
     QHash<QCP::MarginSide, QList<QCPLayoutElement *>> mChildren;
 
     // introduced virtual methods:
     virtual int commonMargin(QCP::MarginSide side) const;
 
     // non-virtual methods:
     void addChild(QCP::MarginSide side, QCPLayoutElement *element);
     void removeChild(QCP::MarginSide side, QCPLayoutElement *element);
 
   private:
     Q_DISABLE_COPY(QCPMarginGroup)
 
     friend class QCPLayoutElement;
 };
 
 class QCP_LIB_DECL QCPLayoutElement : public QCPLayerable
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QCPLayout *layout READ layout)
     Q_PROPERTY(QRect rect READ rect)
     Q_PROPERTY(QRect outerRect READ outerRect WRITE setOuterRect)
     Q_PROPERTY(QMargins margins READ margins WRITE setMargins)
     Q_PROPERTY(QMargins minimumMargins READ minimumMargins WRITE setMinimumMargins)
     Q_PROPERTY(QSize minimumSize READ minimumSize WRITE setMinimumSize)
     Q_PROPERTY(QSize maximumSize READ maximumSize WRITE setMaximumSize)
     /// \endcond
   public:
     /*!
           Defines the phases of the update process, that happens just before a replot. At each phase,
           \ref update is called with the according UpdatePhase value.
         */
     enum UpdatePhase
     {
         upPreparation ///< Phase used for any type of preparation that needs to be done before margin calculation and layout
         ,
         upMargins ///< Phase in which the margins are calculated and set
         ,
         upLayout ///< Final phase in which the layout system places the rects of the elements
     };
     Q_ENUM(UpdatePhase)
 
-    explicit QCPLayoutElement(QCustomPlot *parentPlot = 0);
+    explicit QCPLayoutElement(QCustomPlot *parentPlot = nullptr);
     ~QCPLayoutElement() override;
 
     // getters:
     QCPLayout *layout() const { return mParentLayout; }
     QRect rect() const { return mRect; }
     QRect outerRect() const { return mOuterRect; }
     QMargins margins() const { return mMargins; }
     QMargins minimumMargins() const { return mMinimumMargins; }
     QCP::MarginSides autoMargins() const { return mAutoMargins; }
     QSize minimumSize() const { return mMinimumSize; }
     QSize maximumSize() const { return mMaximumSize; }
-    QCPMarginGroup *marginGroup(QCP::MarginSide side) const { return mMarginGroups.value(side, (QCPMarginGroup *)0); }
+    QCPMarginGroup *marginGroup(QCP::MarginSide side) const { return mMarginGroups.value(side, (QCPMarginGroup *)nullptr); }
     QHash<QCP::MarginSide, QCPMarginGroup *> marginGroups() const { return mMarginGroups; }
 
     // setters:
     void setOuterRect(const QRect &rect);
     void setMargins(const QMargins &margins);
     void setMinimumMargins(const QMargins &margins);
     void setAutoMargins(QCP::MarginSides sides);
     void setMinimumSize(const QSize &size);
     void setMinimumSize(int width, int height);
     void setMaximumSize(const QSize &size);
     void setMaximumSize(int width, int height);
     void setMarginGroup(QCP::MarginSides sides, QCPMarginGroup *group);
 
     // introduced virtual methods:
     virtual void update(UpdatePhase phase);
     virtual QSize minimumSizeHint() const;
     virtual QSize maximumSizeHint() const;
     virtual QList<QCPLayoutElement *> elements(bool recursive) const;
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
   protected:
     // property members:
     QCPLayout *mParentLayout;
     QSize mMinimumSize, mMaximumSize;
     QRect mRect, mOuterRect;
     QMargins mMargins, mMinimumMargins;
     QCP::MarginSides mAutoMargins;
     QHash<QCP::MarginSide, QCPMarginGroup *> mMarginGroups;
 
     // introduced virtual methods:
     virtual int calculateAutoMargin(QCP::MarginSide side);
     virtual void layoutChanged();
 
     // reimplemented virtual methods:
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override { Q_UNUSED(painter) }
     void draw(QCPPainter *painter) override { Q_UNUSED(painter) }
     void parentPlotInitialized(QCustomPlot *parentPlot) override;
 
   private:
     Q_DISABLE_COPY(QCPLayoutElement)
 
     friend class QCustomPlot;
     friend class QCPLayout;
     friend class QCPMarginGroup;
 };
 Q_DECLARE_METATYPE(QCPLayoutElement::UpdatePhase)
 
 class QCP_LIB_DECL QCPLayout : public QCPLayoutElement
 {
     Q_OBJECT
   public:
     explicit QCPLayout();
 
     // reimplemented virtual methods:
     void update(UpdatePhase phase) override;
     QList<QCPLayoutElement *> elements(bool recursive) const override;
 
     // introduced virtual methods:
     virtual int elementCount() const                     = 0;
     virtual QCPLayoutElement *elementAt(int index) const = 0;
     virtual QCPLayoutElement *takeAt(int index)          = 0;
     virtual bool take(QCPLayoutElement *element)         = 0;
     virtual void simplify();
 
     // non-virtual methods:
     bool removeAt(int index);
     bool remove(QCPLayoutElement *element);
     void clear();
 
   protected:
     // introduced virtual methods:
     virtual void updateLayout();
 
     // non-virtual methods:
     void sizeConstraintsChanged() const;
     void adoptElement(QCPLayoutElement *el);
     void releaseElement(QCPLayoutElement *el);
     QVector<int> getSectionSizes(QVector<int> maxSizes, QVector<int> minSizes, QVector<double> stretchFactors,
                                  int totalSize) const;
 
   private:
     Q_DISABLE_COPY(QCPLayout)
     friend class QCPLayoutElement;
 };
 
 class QCP_LIB_DECL QCPLayoutGrid : public QCPLayout
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(int rowCount READ rowCount)
     Q_PROPERTY(int columnCount READ columnCount)
     Q_PROPERTY(QList<double> columnStretchFactors READ columnStretchFactors WRITE setColumnStretchFactors)
     Q_PROPERTY(QList<double> rowStretchFactors READ rowStretchFactors WRITE setRowStretchFactors)
     Q_PROPERTY(int columnSpacing READ columnSpacing WRITE setColumnSpacing)
     Q_PROPERTY(int rowSpacing READ rowSpacing WRITE setRowSpacing)
     Q_PROPERTY(FillOrder fillOrder READ fillOrder WRITE setFillOrder)
     Q_PROPERTY(int wrap READ wrap WRITE setWrap)
     /// \endcond
   public:
     /*!
           Defines in which direction the grid is filled when using \ref addElement(QCPLayoutElement*).
           The column/row at which wrapping into the next row/column occurs can be specified with \ref
           setWrap.
 
           \see setFillOrder
         */
     enum FillOrder
     {
         foRowsFirst ///< Rows are filled first, and a new element is wrapped to the next column if the row count would exceed \ref setWrap.
         ,
         foColumnsFirst ///< Columns are filled first, and a new element is wrapped to the next row if the column count would exceed \ref setWrap.
     };
     Q_ENUM(FillOrder)
 
     explicit QCPLayoutGrid();
     ~QCPLayoutGrid() override;
 
     // getters:
     int rowCount() const { return mElements.size(); }
     int columnCount() const { return mElements.size() > 0 ? mElements.first().size() : 0; }
     QList<double> columnStretchFactors() const { return mColumnStretchFactors; }
     QList<double> rowStretchFactors() const { return mRowStretchFactors; }
     int columnSpacing() const { return mColumnSpacing; }
     int rowSpacing() const { return mRowSpacing; }
     int wrap() const { return mWrap; }
     FillOrder fillOrder() const { return mFillOrder; }
 
     // setters:
     void setColumnStretchFactor(int column, double factor);
     void setColumnStretchFactors(const QList<double> &factors);
     void setRowStretchFactor(int row, double factor);
     void setRowStretchFactors(const QList<double> &factors);
     void setColumnSpacing(int pixels);
     void setRowSpacing(int pixels);
     void setWrap(int count);
     void setFillOrder(FillOrder order, bool rearrange = true);
 
     // reimplemented virtual methods:
     void updateLayout() override;
     int elementCount() const override { return rowCount() * columnCount(); }
     QCPLayoutElement *elementAt(int index) const override;
     QCPLayoutElement *takeAt(int index) override;
     bool take(QCPLayoutElement *element) override;
     QList<QCPLayoutElement *> elements(bool recursive) const override;
     void simplify() override;
     QSize minimumSizeHint() const override;
     QSize maximumSizeHint() const override;
 
     // non-virtual methods:
     QCPLayoutElement *element(int row, int column) const;
     bool addElement(int row, int column, QCPLayoutElement *element);
     bool addElement(QCPLayoutElement *element);
     bool hasElement(int row, int column);
     void expandTo(int newRowCount, int newColumnCount);
     void insertRow(int newIndex);
     void insertColumn(int newIndex);
     int rowColToIndex(int row, int column) const;
     void indexToRowCol(int index, int &row, int &column) const;
 
   protected:
     // property members:
     QList<QList<QCPLayoutElement *>> mElements;
     QList<double> mColumnStretchFactors;
     QList<double> mRowStretchFactors;
     int mColumnSpacing, mRowSpacing;
     int mWrap;
     FillOrder mFillOrder;
 
     // non-virtual methods:
     void getMinimumRowColSizes(QVector<int> *minColWidths, QVector<int> *minRowHeights) const;
     void getMaximumRowColSizes(QVector<int> *maxColWidths, QVector<int> *maxRowHeights) const;
 
   private:
     Q_DISABLE_COPY(QCPLayoutGrid)
 };
 Q_DECLARE_METATYPE(QCPLayoutGrid::FillOrder)
 
 class QCP_LIB_DECL QCPLayoutInset : public QCPLayout
 {
     Q_OBJECT
   public:
     /*!
           Defines how the placement and sizing is handled for a certain element in a QCPLayoutInset.
         */
     enum InsetPlacement
     {
         ipFree ///< The element may be positioned/sized arbitrarily, see \ref setInsetRect
         ,
         ipBorderAligned ///< The element is aligned to one of the layout sides, see \ref setInsetAlignment
     };
     Q_ENUM(InsetPlacement)
 
     explicit QCPLayoutInset();
     ~QCPLayoutInset() override;
 
     // getters:
     InsetPlacement insetPlacement(int index) const;
     Qt::Alignment insetAlignment(int index) const;
     QRectF insetRect(int index) const;
 
     // setters:
     void setInsetPlacement(int index, InsetPlacement placement);
     void setInsetAlignment(int index, Qt::Alignment alignment);
     void setInsetRect(int index, const QRectF &rect);
 
     // reimplemented virtual methods:
     void updateLayout() override;
     int elementCount() const override;
     QCPLayoutElement *elementAt(int index) const override;
     QCPLayoutElement *takeAt(int index) override;
     bool take(QCPLayoutElement *element) override;
     void simplify() override {}
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     // non-virtual methods:
     void addElement(QCPLayoutElement *element, Qt::Alignment alignment);
     void addElement(QCPLayoutElement *element, const QRectF &rect);
 
   protected:
     // property members:
     QList<QCPLayoutElement *> mElements;
     QList<InsetPlacement> mInsetPlacement;
     QList<Qt::Alignment> mInsetAlignment;
     QList<QRectF> mInsetRect;
 
   private:
     Q_DISABLE_COPY(QCPLayoutInset)
 };
 Q_DECLARE_METATYPE(QCPLayoutInset::InsetPlacement)
 
 /* end of 'src/layout.h' */
 
 /* including file 'src/lineending.h', size 4426                              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPLineEnding
 {
     Q_GADGET
   public:
     /*!
           Defines the type of ending decoration for line-like items, e.g. an arrow.
 
           \image html QCPLineEnding.png
 
           The width and length of these decorations can be controlled with the functions \ref setWidth
           and \ref setLength. Some decorations like \ref esDisc, \ref esSquare, \ref esDiamond and \ref esBar only
           support a width, the length property is ignored.
 
           \see QCPItemLine::setHead, QCPItemLine::setTail, QCPItemCurve::setHead, QCPItemCurve::setTail, QCPAxis::setLowerEnding, QCPAxis::setUpperEnding
         */
     enum EndingStyle
     {
         esNone ///< No ending decoration
         ,
         esFlatArrow ///< A filled arrow head with a straight/flat back (a triangle)
         ,
         esSpikeArrow ///< A filled arrow head with an indented back
         ,
         esLineArrow ///< A non-filled arrow head with open back
         ,
         esDisc ///< A filled circle
         ,
         esSquare ///< A filled square
         ,
         esDiamond ///< A filled diamond (45 degrees rotated square)
         ,
         esBar ///< A bar perpendicular to the line
         ,
         esHalfBar ///< A bar perpendicular to the line, pointing out to only one side (to which side can be changed with \ref setInverted)
         ,
         esSkewedBar ///< A bar that is skewed (skew controllable via \ref setLength)
     };
     Q_ENUM(EndingStyle)
 
     QCPLineEnding();
     QCPLineEnding(EndingStyle style, double width = 8, double length = 10, bool inverted = false);
 
     // getters:
     EndingStyle style() const { return mStyle; }
     double width() const { return mWidth; }
     double length() const { return mLength; }
     bool inverted() const { return mInverted; }
 
     // setters:
     void setStyle(EndingStyle style);
     void setWidth(double width);
     void setLength(double length);
     void setInverted(bool inverted);
 
     // non-property methods:
     double boundingDistance() const;
     double realLength() const;
     void draw(QCPPainter *painter, const QCPVector2D &pos, const QCPVector2D &dir) const;
     void draw(QCPPainter *painter, const QCPVector2D &pos, double angle) const;
 
   protected:
     // property members:
     EndingStyle mStyle;
     double mWidth, mLength;
     bool mInverted;
 };
 Q_DECLARE_TYPEINFO(QCPLineEnding, Q_MOVABLE_TYPE);
 Q_DECLARE_METATYPE(QCPLineEnding::EndingStyle)
 
 /* end of 'src/lineending.h' */
 
 /* including file 'src/axis/axisticker.h', size 4177                         */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisTicker
 {
     Q_GADGET
   public:
     /*!
           Defines the strategies that the axis ticker may follow when choosing the size of the tick step.
 
           \see setTickStepStrategy
         */
     enum TickStepStrategy
     {
         tssReadability ///< A nicely readable tick step is prioritized over matching the requested number of ticks (see \ref setTickCount)
         ,
         tssMeetTickCount ///< Less readable tick steps are allowed which in turn facilitates getting closer to the requested tick count
     };
     Q_ENUM(TickStepStrategy)
 
     QCPAxisTicker();
     virtual ~QCPAxisTicker();
 
     // getters:
     TickStepStrategy tickStepStrategy() const { return mTickStepStrategy; }
     int tickCount() const { return mTickCount; }
     double tickOrigin() const { return mTickOrigin; }
 
     // setters:
     void setTickStepStrategy(TickStepStrategy strategy);
     void setTickCount(int count);
     void setTickOrigin(double origin);
 
     // introduced virtual methods:
     virtual void generate(const QCPRange &range, const QLocale &locale, QChar formatChar, int precision,
                           QVector<double> &ticks, QVector<double> *subTicks, QVector<QString> *tickLabels);
 
   protected:
     // property members:
     TickStepStrategy mTickStepStrategy;
     int mTickCount;
     double mTickOrigin;
 
     // introduced virtual methods:
     virtual double getTickStep(const QCPRange &range);
     virtual int getSubTickCount(double tickStep);
     virtual QString getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision);
     virtual QVector<double> createTickVector(double tickStep, const QCPRange &range);
     virtual QVector<double> createSubTickVector(int subTickCount, const QVector<double> &ticks);
     virtual QVector<QString> createLabelVector(const QVector<double> &ticks, const QLocale &locale, QChar formatChar,
                                                int precision);
 
     // non-virtual methods:
     void trimTicks(const QCPRange &range, QVector<double> &ticks, bool keepOneOutlier) const;
     double pickClosest(double target, const QVector<double> &candidates) const;
-    double getMantissa(double input, double *magnitude = 0) const;
+    double getMantissa(double input, double *magnitude = nullptr) const;
     double cleanMantissa(double input) const;
 };
 Q_DECLARE_METATYPE(QCPAxisTicker::TickStepStrategy)
 Q_DECLARE_METATYPE(QSharedPointer<QCPAxisTicker>)
 
 /* end of 'src/axis/axisticker.h' */
 
 /* including file 'src/axis/axistickerdatetime.h', size 3289                 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisTickerDateTime : public QCPAxisTicker
 {
   public:
     QCPAxisTickerDateTime();
 
     // getters:
     QString dateTimeFormat() const { return mDateTimeFormat; }
     Qt::TimeSpec dateTimeSpec() const { return mDateTimeSpec; }
 
     // setters:
     void setDateTimeFormat(const QString &format);
     void setDateTimeSpec(Qt::TimeSpec spec);
     void setTickOrigin(
         double
             origin); // hides base class method but calls baseclass implementation ("using" throws off IDEs and doxygen)
     void setTickOrigin(const QDateTime &origin);
 
     // static methods:
     static QDateTime keyToDateTime(double key);
     static double dateTimeToKey(const QDateTime dateTime);
     static double dateTimeToKey(const QDate date);
 
   protected:
     // property members:
     QString mDateTimeFormat;
     Qt::TimeSpec mDateTimeSpec;
 
     // non-property members:
     enum DateStrategy
     {
         dsNone,
         dsUniformTimeInDay,
         dsUniformDayInMonth
     } mDateStrategy;
 
     // reimplemented virtual methods:
     double getTickStep(const QCPRange &range) override;
     int getSubTickCount(double tickStep) override;
     QString getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision) override;
     QVector<double> createTickVector(double tickStep, const QCPRange &range) override;
 };
 
 /* end of 'src/axis/axistickerdatetime.h' */
 
 /* including file 'src/axis/axistickertime.h', size 3288                     */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisTickerTime : public QCPAxisTicker
 {
     Q_GADGET
   public:
     /*!
           Defines the logical units in which fractions of time spans can be expressed.
 
           \see setFieldWidth, setTimeFormat
         */
     enum TimeUnit
     {
         tuMilliseconds,
         tuSeconds,
         tuMinutes,
         tuHours,
         tuDays
     };
     Q_ENUM(TimeUnit)
 
     QCPAxisTickerTime();
 
     // getters:
     QString timeFormat() const { return mTimeFormat; }
     int fieldWidth(TimeUnit unit) const { return mFieldWidth.value(unit); }
 
     // setters:
     void setTimeFormat(const QString &format);
     void setFieldWidth(TimeUnit unit, int width);
 
   protected:
     // property members:
     QString mTimeFormat;
     QHash<TimeUnit, int> mFieldWidth;
 
     // non-property members:
     TimeUnit mSmallestUnit, mBiggestUnit;
     QHash<TimeUnit, QString> mFormatPattern;
 
     // reimplemented virtual methods:
     double getTickStep(const QCPRange &range) override;
     int getSubTickCount(double tickStep) override;
     QString getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision) override;
 
     // non-virtual methods:
     void replaceUnit(QString &text, TimeUnit unit, int value) const;
 };
 Q_DECLARE_METATYPE(QCPAxisTickerTime::TimeUnit)
 
 /* end of 'src/axis/axistickertime.h' */
 
 /* including file 'src/axis/axistickerfixed.h', size 3308                    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisTickerFixed : public QCPAxisTicker
 {
     Q_GADGET
   public:
     /*!
           Defines how the axis ticker may modify the specified tick step (\ref setTickStep) in order to
           control the number of ticks in the axis range.
 
           \see setScaleStrategy
         */
     enum ScaleStrategy
     {
         ssNone ///< Modifications are not allowed, the specified tick step is absolutely fixed. This might cause a high tick density and overlapping labels if the axis range is zoomed out.
         ,
         ssMultiples ///< An integer multiple of the specified tick step is allowed. The used factor follows the base class properties of \ref setTickStepStrategy and \ref setTickCount.
         ,
         ssPowers ///< An integer power of the specified tick step is allowed.
     };
     Q_ENUM(ScaleStrategy)
 
     QCPAxisTickerFixed();
 
     // getters:
     double tickStep() const { return mTickStep; }
     ScaleStrategy scaleStrategy() const { return mScaleStrategy; }
 
     // setters:
     void setTickStep(double step);
     void setScaleStrategy(ScaleStrategy strategy);
 
   protected:
     // property members:
     double mTickStep;
     ScaleStrategy mScaleStrategy;
 
     // reimplemented virtual methods:
     double getTickStep(const QCPRange &range) override;
 };
 Q_DECLARE_METATYPE(QCPAxisTickerFixed::ScaleStrategy)
 
 /* end of 'src/axis/axistickerfixed.h' */
 
 /* including file 'src/axis/axistickertext.h', size 3085                     */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisTickerText : public QCPAxisTicker
 {
   public:
     QCPAxisTickerText();
 
     // getters:
     QMap<double, QString> &ticks() { return mTicks; }
     int subTickCount() const { return mSubTickCount; }
 
     // setters:
     void setTicks(const QMap<double, QString> &ticks);
     void setTicks(const QVector<double> &positions, const QVector<QString> labels);
     void setSubTickCount(int subTicks);
 
     // non-virtual methods:
     void clear();
     void addTick(double position, QString label);
     void addTicks(const QMap<double, QString> &ticks);
     void addTicks(const QVector<double> &positions, const QVector<QString> &labels);
 
   protected:
     // property members:
     QMap<double, QString> mTicks;
     int mSubTickCount;
 
     // reimplemented virtual methods:
     double getTickStep(const QCPRange &range) override;
     int getSubTickCount(double tickStep) override;
     QString getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision) override;
     QVector<double> createTickVector(double tickStep, const QCPRange &range) override;
 };
 
 /* end of 'src/axis/axistickertext.h' */
 
 /* including file 'src/axis/axistickerpi.h', size 3911                       */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisTickerPi : public QCPAxisTicker
 {
     Q_GADGET
   public:
     /*!
           Defines how fractions should be displayed in tick labels.
 
           \see setFractionStyle
         */
     enum FractionStyle
     {
         fsFloatingPoint ///< Fractions are displayed as regular decimal floating point numbers, e.g. "0.25" or "0.125".
         ,
         fsAsciiFractions ///< Fractions are written as rationals using ASCII characters only, e.g. "1/4" or "1/8"
         ,
         fsUnicodeFractions ///< Fractions are written using sub- and superscript UTF-8 digits and the fraction symbol.
     };
     Q_ENUM(FractionStyle)
 
     QCPAxisTickerPi();
 
     // getters:
     QString piSymbol() const { return mPiSymbol; }
     double piValue() const { return mPiValue; }
     bool periodicity() const { return mPeriodicity; }
     FractionStyle fractionStyle() const { return mFractionStyle; }
 
     // setters:
     void setPiSymbol(QString symbol);
     void setPiValue(double pi);
     void setPeriodicity(int multiplesOfPi);
     void setFractionStyle(FractionStyle style);
 
   protected:
     // property members:
     QString mPiSymbol;
     double mPiValue;
     int mPeriodicity;
     FractionStyle mFractionStyle;
 
     // non-property members:
     double mPiTickStep; // size of one tick step in units of mPiValue
 
     // reimplemented virtual methods:
     double getTickStep(const QCPRange &range) override;
     int getSubTickCount(double tickStep) override;
     QString getTickLabel(double tick, const QLocale &locale, QChar formatChar, int precision) override;
 
     // non-virtual methods:
     void simplifyFraction(int &numerator, int &denominator) const;
     QString fractionToString(int numerator, int denominator) const;
     QString unicodeFraction(int numerator, int denominator) const;
     QString unicodeSuperscript(int number) const;
     QString unicodeSubscript(int number) const;
 };
 Q_DECLARE_METATYPE(QCPAxisTickerPi::FractionStyle)
 
 /* end of 'src/axis/axistickerpi.h' */
 
 /* including file 'src/axis/axistickerlog.h', size 2663                      */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisTickerLog : public QCPAxisTicker
 {
   public:
     QCPAxisTickerLog();
 
     // getters:
     double logBase() const { return mLogBase; }
     int subTickCount() const { return mSubTickCount; }
 
     // setters:
     void setLogBase(double base);
     void setSubTickCount(int subTicks);
 
   protected:
     // property members:
     double mLogBase;
     int mSubTickCount;
 
     // non-property members:
     double mLogBaseLnInv;
 
     // reimplemented virtual methods:
     double getTickStep(const QCPRange &range) override;
     int getSubTickCount(double tickStep) override;
     QVector<double> createTickVector(double tickStep, const QCPRange &range) override;
 };
 
 /* end of 'src/axis/axistickerlog.h' */
 
 /* including file 'src/axis/axis.h', size 20230                              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPGrid : public QCPLayerable
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(bool subGridVisible READ subGridVisible WRITE setSubGridVisible)
     Q_PROPERTY(bool antialiasedSubGrid READ antialiasedSubGrid WRITE setAntialiasedSubGrid)
     Q_PROPERTY(bool antialiasedZeroLine READ antialiasedZeroLine WRITE setAntialiasedZeroLine)
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen subGridPen READ subGridPen WRITE setSubGridPen)
     Q_PROPERTY(QPen zeroLinePen READ zeroLinePen WRITE setZeroLinePen)
     /// \endcond
   public:
     explicit QCPGrid(QCPAxis *parentAxis);
 
     // getters:
     bool subGridVisible() const { return mSubGridVisible; }
     bool antialiasedSubGrid() const { return mAntialiasedSubGrid; }
     bool antialiasedZeroLine() const { return mAntialiasedZeroLine; }
     QPen pen() const { return mPen; }
     QPen subGridPen() const { return mSubGridPen; }
     QPen zeroLinePen() const { return mZeroLinePen; }
 
     // setters:
     void setSubGridVisible(bool visible);
     void setAntialiasedSubGrid(bool enabled);
     void setAntialiasedZeroLine(bool enabled);
     void setPen(const QPen &pen);
     void setSubGridPen(const QPen &pen);
     void setZeroLinePen(const QPen &pen);
 
   protected:
     // property members:
     bool mSubGridVisible;
     bool mAntialiasedSubGrid, mAntialiasedZeroLine;
     QPen mPen, mSubGridPen, mZeroLinePen;
 
     // non-property members:
     QCPAxis *mParentAxis;
 
     // reimplemented virtual methods:
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     void draw(QCPPainter *painter) override;
 
     // non-virtual methods:
     void drawGridLines(QCPPainter *painter) const;
     void drawSubGridLines(QCPPainter *painter) const;
 
     friend class QCPAxis;
 };
 
 class QCP_LIB_DECL QCPAxis : public QCPLayerable
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(AxisType axisType READ axisType)
     Q_PROPERTY(QCPAxisRect *axisRect READ axisRect)
     Q_PROPERTY(ScaleType scaleType READ scaleType WRITE setScaleType NOTIFY scaleTypeChanged)
     Q_PROPERTY(QCPRange range READ range WRITE setRange NOTIFY rangeChanged)
     Q_PROPERTY(bool rangeReversed READ rangeReversed WRITE setRangeReversed)
     Q_PROPERTY(QSharedPointer<QCPAxisTicker> ticker READ ticker WRITE setTicker)
     Q_PROPERTY(bool ticks READ ticks WRITE setTicks)
     Q_PROPERTY(bool tickLabels READ tickLabels WRITE setTickLabels)
     Q_PROPERTY(int tickLabelPadding READ tickLabelPadding WRITE setTickLabelPadding)
     Q_PROPERTY(QFont tickLabelFont READ tickLabelFont WRITE setTickLabelFont)
     Q_PROPERTY(QColor tickLabelColor READ tickLabelColor WRITE setTickLabelColor)
     Q_PROPERTY(double tickLabelRotation READ tickLabelRotation WRITE setTickLabelRotation)
     Q_PROPERTY(LabelSide tickLabelSide READ tickLabelSide WRITE setTickLabelSide)
     Q_PROPERTY(QString numberFormat READ numberFormat WRITE setNumberFormat)
     Q_PROPERTY(int numberPrecision READ numberPrecision WRITE setNumberPrecision)
     Q_PROPERTY(QVector<double> tickVector READ tickVector)
     Q_PROPERTY(QVector<QString> tickVectorLabels READ tickVectorLabels)
     Q_PROPERTY(int tickLengthIn READ tickLengthIn WRITE setTickLengthIn)
     Q_PROPERTY(int tickLengthOut READ tickLengthOut WRITE setTickLengthOut)
     Q_PROPERTY(bool subTicks READ subTicks WRITE setSubTicks)
     Q_PROPERTY(int subTickLengthIn READ subTickLengthIn WRITE setSubTickLengthIn)
     Q_PROPERTY(int subTickLengthOut READ subTickLengthOut WRITE setSubTickLengthOut)
     Q_PROPERTY(QPen basePen READ basePen WRITE setBasePen)
     Q_PROPERTY(QPen tickPen READ tickPen WRITE setTickPen)
     Q_PROPERTY(QPen subTickPen READ subTickPen WRITE setSubTickPen)
     Q_PROPERTY(QFont labelFont READ labelFont WRITE setLabelFont)
     Q_PROPERTY(QColor labelColor READ labelColor WRITE setLabelColor)
     Q_PROPERTY(QString label READ label WRITE setLabel)
     Q_PROPERTY(int labelPadding READ labelPadding WRITE setLabelPadding)
     Q_PROPERTY(int padding READ padding WRITE setPadding)
     Q_PROPERTY(int offset READ offset WRITE setOffset)
     Q_PROPERTY(SelectableParts selectedParts READ selectedParts WRITE setSelectedParts NOTIFY selectionChanged)
     Q_PROPERTY(SelectableParts selectableParts READ selectableParts WRITE setSelectableParts NOTIFY selectableChanged)
     Q_PROPERTY(QFont selectedTickLabelFont READ selectedTickLabelFont WRITE setSelectedTickLabelFont)
     Q_PROPERTY(QFont selectedLabelFont READ selectedLabelFont WRITE setSelectedLabelFont)
     Q_PROPERTY(QColor selectedTickLabelColor READ selectedTickLabelColor WRITE setSelectedTickLabelColor)
     Q_PROPERTY(QColor selectedLabelColor READ selectedLabelColor WRITE setSelectedLabelColor)
     Q_PROPERTY(QPen selectedBasePen READ selectedBasePen WRITE setSelectedBasePen)
     Q_PROPERTY(QPen selectedTickPen READ selectedTickPen WRITE setSelectedTickPen)
     Q_PROPERTY(QPen selectedSubTickPen READ selectedSubTickPen WRITE setSelectedSubTickPen)
     Q_PROPERTY(QCPLineEnding lowerEnding READ lowerEnding WRITE setLowerEnding)
     Q_PROPERTY(QCPLineEnding upperEnding READ upperEnding WRITE setUpperEnding)
     Q_PROPERTY(QCPGrid *grid READ grid)
     /// \endcond
   public:
     /*!
           Defines at which side of the axis rect the axis will appear. This also affects how the tick
           marks are drawn, on which side the labels are placed etc.
         */
     enum AxisType
     {
         atLeft = 0x01 ///< <tt>0x01</tt> Axis is vertical and on the left side of the axis rect
         ,
         atRight = 0x02 ///< <tt>0x02</tt> Axis is vertical and on the right side of the axis rect
         ,
         atTop = 0x04 ///< <tt>0x04</tt> Axis is horizontal and on the top side of the axis rect
         ,
         atBottom = 0x08 ///< <tt>0x08</tt> Axis is horizontal and on the bottom side of the axis rect
     };
     Q_ENUM(AxisType)
     Q_FLAGS(AxisTypes)
     Q_DECLARE_FLAGS(AxisTypes, AxisType)
     /*!
           Defines on which side of the axis the tick labels (numbers) shall appear.
 
           \see setTickLabelSide
         */
     enum LabelSide
     {
         lsInside ///< Tick labels will be displayed inside the axis rect and clipped to the inner axis rect
         ,
         lsOutside ///< Tick labels will be displayed outside the axis rect
     };
     Q_ENUM(LabelSide)
     /*!
           Defines the scale of an axis.
           \see setScaleType
         */
     enum ScaleType
     {
         stLinear ///< Linear scaling
         ,
         stLogarithmic ///< Logarithmic scaling with correspondingly transformed axis coordinates (possibly also \ref setTicker to a \ref QCPAxisTickerLog instance).
     };
     Q_ENUM(ScaleType)
     /*!
           Defines the selectable parts of an axis.
           \see setSelectableParts, setSelectedParts
         */
     enum SelectablePart
     {
         spNone = 0 ///< None of the selectable parts
         ,
         spAxis = 0x001 ///< The axis backbone and tick marks
         ,
         spTickLabels = 0x002 ///< Tick labels (numbers) of this axis (as a whole, not individually)
         ,
         spAxisLabel = 0x004 ///< The axis label
     };
     Q_ENUM(SelectablePart)
     Q_FLAGS(SelectableParts)
     Q_DECLARE_FLAGS(SelectableParts, SelectablePart)
 
     explicit QCPAxis(QCPAxisRect *parent, AxisType type);
     ~QCPAxis() override;
 
     // getters:
     AxisType axisType() const { return mAxisType; }
     QCPAxisRect *axisRect() const { return mAxisRect; }
     ScaleType scaleType() const { return mScaleType; }
     const QCPRange range() const { return mRange; }
     bool rangeReversed() const { return mRangeReversed; }
     QSharedPointer<QCPAxisTicker> ticker() const { return mTicker; }
     bool ticks() const { return mTicks; }
     bool tickLabels() const { return mTickLabels; }
     int tickLabelPadding() const;
     QFont tickLabelFont() const { return mTickLabelFont; }
     QColor tickLabelColor() const { return mTickLabelColor; }
     double tickLabelRotation() const;
     LabelSide tickLabelSide() const;
     QString numberFormat() const;
     int numberPrecision() const { return mNumberPrecision; }
     QVector<double> tickVector() const { return mTickVector; }
     QVector<QString> tickVectorLabels() const { return mTickVectorLabels; }
     int tickLengthIn() const;
     int tickLengthOut() const;
     bool subTicks() const { return mSubTicks; }
     int subTickLengthIn() const;
     int subTickLengthOut() const;
     QPen basePen() const { return mBasePen; }
     QPen tickPen() const { return mTickPen; }
     QPen subTickPen() const { return mSubTickPen; }
     QFont labelFont() const { return mLabelFont; }
     QColor labelColor() const { return mLabelColor; }
     QString label() const { return mLabel; }
     int labelPadding() const;
     int padding() const { return mPadding; }
     int offset() const;
     SelectableParts selectedParts() const { return mSelectedParts; }
     SelectableParts selectableParts() const { return mSelectableParts; }
     QFont selectedTickLabelFont() const { return mSelectedTickLabelFont; }
     QFont selectedLabelFont() const { return mSelectedLabelFont; }
     QColor selectedTickLabelColor() const { return mSelectedTickLabelColor; }
     QColor selectedLabelColor() const { return mSelectedLabelColor; }
     QPen selectedBasePen() const { return mSelectedBasePen; }
     QPen selectedTickPen() const { return mSelectedTickPen; }
     QPen selectedSubTickPen() const { return mSelectedSubTickPen; }
     QCPLineEnding lowerEnding() const;
     QCPLineEnding upperEnding() const;
     QCPGrid *grid() const { return mGrid; }
 
     // setters:
     Q_SLOT void setScaleType(QCPAxis::ScaleType type);
     Q_SLOT void setRange(const QCPRange &range);
     void setRange(double lower, double upper);
     void setRange(double position, double size, Qt::AlignmentFlag alignment);
     void setRangeLower(double lower);
     void setRangeUpper(double upper);
     void setRangeReversed(bool reversed);
     void setTicker(QSharedPointer<QCPAxisTicker> ticker);
     void setTicks(bool show);
     void setTickLabels(bool show);
     void setTickLabelPadding(int padding);
     void setTickLabelFont(const QFont &font);
     void setTickLabelColor(const QColor &color);
     void setTickLabelRotation(double degrees);
     void setTickLabelSide(LabelSide side);
     void setNumberFormat(const QString &formatCode);
     void setNumberPrecision(int precision);
     void setTickLength(int inside, int outside = 0);
     void setTickLengthIn(int inside);
     void setTickLengthOut(int outside);
     void setSubTicks(bool show);
     void setSubTickLength(int inside, int outside = 0);
     void setSubTickLengthIn(int inside);
     void setSubTickLengthOut(int outside);
     void setBasePen(const QPen &pen);
     void setTickPen(const QPen &pen);
     void setSubTickPen(const QPen &pen);
     void setLabelFont(const QFont &font);
     void setLabelColor(const QColor &color);
     void setLabel(const QString &str);
     void setLabelPadding(int padding);
     void setPadding(int padding);
     void setOffset(int offset);
     void setSelectedTickLabelFont(const QFont &font);
     void setSelectedLabelFont(const QFont &font);
     void setSelectedTickLabelColor(const QColor &color);
     void setSelectedLabelColor(const QColor &color);
     void setSelectedBasePen(const QPen &pen);
     void setSelectedTickPen(const QPen &pen);
     void setSelectedSubTickPen(const QPen &pen);
     Q_SLOT void setSelectableParts(const QCPAxis::SelectableParts &selectableParts);
     Q_SLOT void setSelectedParts(const QCPAxis::SelectableParts &selectedParts);
     void setLowerEnding(const QCPLineEnding &ending);
     void setUpperEnding(const QCPLineEnding &ending);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     // non-property methods:
     Qt::Orientation orientation() const { return mOrientation; }
     int pixelOrientation() const { return rangeReversed() != (orientation() == Qt::Vertical) ? -1 : 1; }
     void moveRange(double diff);
     void scaleRange(double factor);
     void scaleRange(double factor, double center);
     void setScaleRatio(const QCPAxis *otherAxis, double ratio = 1.0);
     void rescale(bool onlyVisiblePlottables = false);
     double pixelToCoord(double value) const;
     double coordToPixel(double value) const;
     SelectablePart getPartAt(const QPointF &pos) const;
     QList<QCPAbstractPlottable *> plottables() const;
     QList<QCPGraph *> graphs() const;
     QList<QCPAbstractItem *> items() const;
 
     static AxisType marginSideToAxisType(QCP::MarginSide side);
     static Qt::Orientation orientation(AxisType type)
     {
         return type == atBottom || type == atTop ? Qt::Horizontal : Qt::Vertical;
     }
     static AxisType opposite(AxisType type);
 
   signals:
     void rangeChanged(const QCPRange &newRange);
     void rangeChanged(const QCPRange &newRange, const QCPRange &oldRange);
     void scaleTypeChanged(QCPAxis::ScaleType scaleType);
     void selectionChanged(const QCPAxis::SelectableParts &parts);
     void selectableChanged(const QCPAxis::SelectableParts &parts);
 
   protected:
     // property members:
     // axis base:
     AxisType mAxisType;
     QCPAxisRect *mAxisRect;
     //int mOffset; // in QCPAxisPainter
     int mPadding;
     Qt::Orientation mOrientation;
     SelectableParts mSelectableParts, mSelectedParts;
     QPen mBasePen, mSelectedBasePen;
     //QCPLineEnding mLowerEnding, mUpperEnding; // in QCPAxisPainter
     // axis label:
     //int mLabelPadding; // in QCPAxisPainter
     QString mLabel;
     QFont mLabelFont, mSelectedLabelFont;
     QColor mLabelColor, mSelectedLabelColor;
     // tick labels:
     //int mTickLabelPadding; // in QCPAxisPainter
     bool mTickLabels;
     //double mTickLabelRotation; // in QCPAxisPainter
     QFont mTickLabelFont, mSelectedTickLabelFont;
     QColor mTickLabelColor, mSelectedTickLabelColor;
     int mNumberPrecision;
     QLatin1Char mNumberFormatChar;
     bool mNumberBeautifulPowers;
     //bool mNumberMultiplyCross; // QCPAxisPainter
     // ticks and subticks:
     bool mTicks;
     bool mSubTicks;
     //int mTickLengthIn, mTickLengthOut, mSubTickLengthIn, mSubTickLengthOut; // QCPAxisPainter
     QPen mTickPen, mSelectedTickPen;
     QPen mSubTickPen, mSelectedSubTickPen;
     // scale and range:
     QCPRange mRange;
     bool mRangeReversed;
     ScaleType mScaleType;
 
     // non-property members:
     QCPGrid *mGrid;
     QCPAxisPainterPrivate *mAxisPainter;
     QSharedPointer<QCPAxisTicker> mTicker;
     QVector<double> mTickVector;
     QVector<QString> mTickVectorLabels;
     QVector<double> mSubTickVector;
     bool mCachedMarginValid;
     int mCachedMargin;
 
     // introduced virtual methods:
     virtual int calculateMargin();
 
     // reimplemented virtual methods:
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     void draw(QCPPainter *painter) override;
     QCP::Interaction selectionCategory() const override;
     // events:
     void selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                              bool *selectionStateChanged) override;
     void deselectEvent(bool *selectionStateChanged) override;
 
     // non-virtual methods:
     void setupTickVectors();
     QPen getBasePen() const;
     QPen getTickPen() const;
     QPen getSubTickPen() const;
     QFont getTickLabelFont() const;
     QFont getLabelFont() const;
     QColor getTickLabelColor() const;
     QColor getLabelColor() const;
 
   private:
     Q_DISABLE_COPY(QCPAxis)
 
     friend class QCustomPlot;
     friend class QCPGrid;
     friend class QCPAxisRect;
 };
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCPAxis::SelectableParts)
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCPAxis::AxisTypes)
 Q_DECLARE_METATYPE(QCPAxis::AxisType)
 Q_DECLARE_METATYPE(QCPAxis::LabelSide)
 Q_DECLARE_METATYPE(QCPAxis::ScaleType)
 Q_DECLARE_METATYPE(QCPAxis::SelectablePart)
 
 class QCPAxisPainterPrivate
 {
   public:
     explicit QCPAxisPainterPrivate(QCustomPlot *parentPlot);
     virtual ~QCPAxisPainterPrivate();
 
     virtual void draw(QCPPainter *painter);
     virtual int size() const;
     void clearCache();
 
     QRect axisSelectionBox() const { return mAxisSelectionBox; }
     QRect tickLabelsSelectionBox() const { return mTickLabelsSelectionBox; }
     QRect labelSelectionBox() const { return mLabelSelectionBox; }
 
     // public property members:
     QCPAxis::AxisType type;
     QPen basePen;
     QCPLineEnding lowerEnding, upperEnding; // directly accessed by QCPAxis setters/getters
     int labelPadding;                       // directly accessed by QCPAxis setters/getters
     QFont labelFont;
     QColor labelColor;
     QString label;
     int tickLabelPadding;             // directly accessed by QCPAxis setters/getters
     double tickLabelRotation;         // directly accessed by QCPAxis setters/getters
     QCPAxis::LabelSide tickLabelSide; // directly accessed by QCPAxis setters/getters
     bool substituteExponent;
     bool numberMultiplyCross;                                           // directly accessed by QCPAxis setters/getters
     int tickLengthIn, tickLengthOut, subTickLengthIn, subTickLengthOut; // directly accessed by QCPAxis setters/getters
     QPen tickPen, subTickPen;
     QFont tickLabelFont;
     QColor tickLabelColor;
     QRect axisRect, viewportRect;
     double offset; // directly accessed by QCPAxis setters/getters
     bool abbreviateDecimalPowers;
     bool reversedEndings;
 
     QVector<double> subTickPositions;
     QVector<double> tickPositions;
     QVector<QString> tickLabels;
 
   protected:
     struct CachedLabel
     {
         QPointF offset;
         QPixmap pixmap;
     };
     struct TickLabelData
     {
         QString basePart, expPart, suffixPart;
         QRect baseBounds, expBounds, suffixBounds, totalBounds, rotatedTotalBounds;
         QFont baseFont, expFont;
     };
     QCustomPlot *mParentPlot;
     QByteArray mLabelParameterHash; // to determine whether mLabelCache needs to be cleared due to changed parameters
     QCache<QString, CachedLabel> mLabelCache;
     QRect mAxisSelectionBox, mTickLabelsSelectionBox, mLabelSelectionBox;
 
     virtual QByteArray generateLabelParameterHash() const;
 
     virtual void placeTickLabel(QCPPainter *painter, double position, int distanceToAxis, const QString &text,
                                 QSize *tickLabelsSize);
     virtual void drawTickLabel(QCPPainter *painter, double x, double y, const TickLabelData &labelData) const;
     virtual TickLabelData getTickLabelData(const QFont &font, const QString &text) const;
     virtual QPointF getTickLabelDrawOffset(const TickLabelData &labelData) const;
     virtual void getMaxTickLabelSize(const QFont &font, const QString &text, QSize *tickLabelsSize) const;
 };
 
 /* end of 'src/axis/axis.h' */
 
 /* including file 'src/scatterstyle.h', size 7275                            */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPScatterStyle
 {
     Q_GADGET
   public:
     /*!
           Represents the various properties of a scatter style instance. For example, this enum is used
           to specify which properties of \ref QCPSelectionDecorator::setScatterStyle will be used when
           highlighting selected data points.
 
           Specific scatter properties can be transferred between \ref QCPScatterStyle instances via \ref
           setFromOther.
         */
     enum ScatterProperty
     {
         spNone = 0x00 ///< <tt>0x00</tt> None
         ,
         spPen = 0x01 ///< <tt>0x01</tt> The pen property, see \ref setPen
         ,
         spBrush = 0x02 ///< <tt>0x02</tt> The brush property, see \ref setBrush
         ,
         spSize = 0x04 ///< <tt>0x04</tt> The size property, see \ref setSize
         ,
         spShape = 0x08 ///< <tt>0x08</tt> The shape property, see \ref setShape
         ,
         spAll = 0xFF ///< <tt>0xFF</tt> All properties
     };
     Q_ENUM(ScatterProperty)
     Q_FLAGS(ScatterProperties)
     Q_DECLARE_FLAGS(ScatterProperties, ScatterProperty)
 
     /*!
           Defines the shape used for scatter points.
 
           On plottables/items that draw scatters, the sizes of these visualizations (with exception of
           \ref ssDot and \ref ssPixmap) can be controlled with the \ref setSize function. Scatters are
           drawn with the pen and brush specified with \ref setPen and \ref setBrush.
         */
     enum ScatterShape
     {
         ssNone ///< no scatter symbols are drawn (e.g. in QCPGraph, data only represented with lines)
         ,
         ssDot ///< \enumimage{ssDot.png} a single pixel (use \ref ssDisc or \ref ssCircle if you want a round shape with a certain radius)
         ,
         ssCross ///< \enumimage{ssCross.png} a cross
         ,
         ssPlus ///< \enumimage{ssPlus.png} a plus
         ,
         ssCircle ///< \enumimage{ssCircle.png} a circle
         ,
         ssDisc ///< \enumimage{ssDisc.png} a circle which is filled with the pen's color (not the brush as with ssCircle)
         ,
         ssSquare ///< \enumimage{ssSquare.png} a square
         ,
         ssDiamond ///< \enumimage{ssDiamond.png} a diamond
         ,
         ssStar ///< \enumimage{ssStar.png} a star with eight arms, i.e. a combination of cross and plus
         ,
         ssTriangle ///< \enumimage{ssTriangle.png} an equilateral triangle, standing on baseline
         ,
         ssTriangleInverted ///< \enumimage{ssTriangleInverted.png} an equilateral triangle, standing on corner
         ,
         ssCrossSquare ///< \enumimage{ssCrossSquare.png} a square with a cross inside
         ,
         ssPlusSquare ///< \enumimage{ssPlusSquare.png} a square with a plus inside
         ,
         ssCrossCircle ///< \enumimage{ssCrossCircle.png} a circle with a cross inside
         ,
         ssPlusCircle ///< \enumimage{ssPlusCircle.png} a circle with a plus inside
         ,
         ssPeace ///< \enumimage{ssPeace.png} a circle, with one vertical and two downward diagonal lines
         ,
         ssPixmap ///< a custom pixmap specified by \ref setPixmap, centered on the data point coordinates
         ,
         ssCustom ///< custom painter operations are performed per scatter (As QPainterPath, see \ref setCustomPath)
     };
     Q_ENUM(ScatterShape)
 
     QCPScatterStyle();
     QCPScatterStyle(ScatterShape shape, double size = 6);
     QCPScatterStyle(ScatterShape shape, const QColor &color, double size);
     QCPScatterStyle(ScatterShape shape, const QColor &color, const QColor &fill, double size);
     QCPScatterStyle(ScatterShape shape, const QPen &pen, const QBrush &brush, double size);
     QCPScatterStyle(const QPixmap &pixmap);
     QCPScatterStyle(const QPainterPath &customPath, const QPen &pen, const QBrush &brush = Qt::NoBrush,
                     double size = 6);
 
     // getters:
     double size() const { return mSize; }
     ScatterShape shape() const { return mShape; }
     QPen pen() const { return mPen; }
     QBrush brush() const { return mBrush; }
     QPixmap pixmap() const { return mPixmap; }
     QPainterPath customPath() const { return mCustomPath; }
 
     // setters:
     void setFromOther(const QCPScatterStyle &other, ScatterProperties properties);
     void setSize(double size);
     void setShape(ScatterShape shape);
     void setPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setPixmap(const QPixmap &pixmap);
     void setCustomPath(const QPainterPath &customPath);
 
     // non-property methods:
     bool isNone() const { return mShape == ssNone; }
     bool isPenDefined() const { return mPenDefined; }
     void undefinePen();
     void applyTo(QCPPainter *painter, const QPen &defaultPen) const;
     void drawShape(QCPPainter *painter, const QPointF &pos) const;
     void drawShape(QCPPainter *painter, double x, double y) const;
 
   protected:
     // property members:
     double mSize;
     ScatterShape mShape;
     QPen mPen;
     QBrush mBrush;
     QPixmap mPixmap;
     QPainterPath mCustomPath;
 
     // non-property members:
     bool mPenDefined;
 };
 Q_DECLARE_TYPEINFO(QCPScatterStyle, Q_MOVABLE_TYPE);
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCPScatterStyle::ScatterProperties)
 Q_DECLARE_METATYPE(QCPScatterStyle::ScatterProperty)
 Q_DECLARE_METATYPE(QCPScatterStyle::ScatterShape)
 
 /* end of 'src/scatterstyle.h' */
 
 /* including file 'src/datacontainer.h', size 4535                           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 /*! \relates QCPDataContainer
   Returns whether the sort key of \a a is less than the sort key of \a b.
 
   \see QCPDataContainer::sort
 */
 template <class DataType>
 inline bool qcpLessThanSortKey(const DataType &a, const DataType &b)
 {
     return a.sortKey() < b.sortKey();
 }
 
 template <class DataType>
 class QCP_LIB_DECL QCPDataContainer
 {
   public:
     typedef typename QVector<DataType>::const_iterator const_iterator;
     typedef typename QVector<DataType>::iterator iterator;
 
     QCPDataContainer();
 
     // getters:
     int size() const { return mData.size() - mPreallocSize; }
     bool isEmpty() const { return size() == 0; }
     bool autoSqueeze() const { return mAutoSqueeze; }
 
     // setters:
     void setAutoSqueeze(bool enabled);
 
     // non-virtual methods:
     void set(const QCPDataContainer<DataType> &data);
     void set(const QVector<DataType> &data, bool alreadySorted = false);
     void add(const QCPDataContainer<DataType> &data);
     void add(const QVector<DataType> &data, bool alreadySorted = false);
     void add(const DataType &data);
     void removeBefore(double sortKey);
     void removeAfter(double sortKey);
     void remove(double sortKeyFrom, double sortKeyTo);
     void remove(double sortKey);
     void clear();
     void sort();
     void squeeze(bool preAllocation = true, bool postAllocation = true);
 
     const_iterator constBegin() const { return mData.constBegin() + mPreallocSize; }
     const_iterator constEnd() const { return mData.constEnd(); }
     iterator begin() { return mData.begin() + mPreallocSize; }
     iterator end() { return mData.end(); }
     const_iterator findBegin(double sortKey, bool expandedRange = true) const;
     const_iterator findEnd(double sortKey, bool expandedRange = true) const;
     const_iterator at(int index) const { return constBegin() + qBound(0, index, size()); }
     QCPRange keyRange(bool &foundRange, QCP::SignDomain signDomain = QCP::sdBoth);
     QCPRange valueRange(bool &foundRange, QCP::SignDomain signDomain = QCP::sdBoth,
                         const QCPRange &inKeyRange = QCPRange());
     QCPDataRange dataRange() const { return QCPDataRange(0, size()); }
     void limitIteratorsToDataRange(const_iterator &begin, const_iterator &end, const QCPDataRange &dataRange) const;
 
   protected:
     // property members:
     bool mAutoSqueeze;
 
     // non-property memebers:
     QVector<DataType> mData;
     int mPreallocSize;
     int mPreallocIteration;
 
     // non-virtual methods:
     void preallocateGrow(int minimumPreallocSize);
     void performAutoSqueeze();
 };
 
 // include implementation in header since it is a class template:
 
 /* including file 'src/datacontainer.cpp', size 31224                        */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPDataContainer
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPDataContainer
   \brief The generic data container for one-dimensional plottables
 
   This class template provides a fast container for data storage of one-dimensional data. The data
   type is specified as template parameter (called \a DataType in the following) and must provide
   some methods as described in the \ref qcpdatacontainer-datatype "next section".
 
   The data is stored in a sorted fashion, which allows very quick lookups by the sorted key as well
   as retrieval of ranges (see \ref findBegin, \ref findEnd, \ref keyRange) using binary search. The
   container uses a preallocation and a postallocation scheme, such that appending and prepending
   data (with respect to the sort key) is very fast and minimizes reallocations. If data is added
   which needs to be inserted between existing keys, the merge usually can be done quickly too,
   using the fact that existing data is always sorted. The user can further improve performance by
   specifying that added data is already itself sorted by key, if he can guarantee that this is the
   case (see for example \ref add(const QVector<DataType> &data, bool alreadySorted)).
 
   The data can be accessed with the provided const iterators (\ref constBegin, \ref constEnd). If
   it is necessary to alter existing data in-place, the non-const iterators can be used (\ref begin,
   \ref end). Changing data members that are not the sort key (for most data types called \a key) is
   safe from the container's perspective.
 
   Great care must be taken however if the sort key is modified through the non-const iterators. For
   performance reasons, the iterators don't automatically cause a re-sorting upon their
   manipulation. It is thus the responsibility of the user to leave the container in a sorted state
   when finished with the data manipulation, before calling any other methods on the container. A
   complete re-sort (e.g. after finishing all sort key manipulation) can be done by calling \ref
   sort. Failing to do so can not be detected by the container efficiently and will cause both
   rendering artifacts and potential data loss.
 
   Implementing one-dimensional plottables that make use of a \ref QCPDataContainer<T> is usually
   done by subclassing from \ref QCPAbstractPlottable1D "QCPAbstractPlottable1D<T>", which
   introduces an according \a mDataContainer member and some convenience methods.
 
   \section qcpdatacontainer-datatype Requirements for the DataType template parameter
 
   The template parameter <tt>DataType</tt> is the type of the stored data points. It must be
   trivially copyable and have the following public methods, preferably inline:
 
   \li <tt>double sortKey() const</tt>\n Returns the member variable of this data point that is the
   sort key, defining the ordering in the container. Often this variable is simply called \a key.
 
   \li <tt>static DataType fromSortKey(double sortKey)</tt>\n Returns a new instance of the data
   type initialized with its sort key set to \a sortKey.
 
   \li <tt>static bool sortKeyIsMainKey()</tt>\n Returns true if the sort key is equal to the main
   key (see method \c mainKey below). For most plottables this is the case. It is not the case for
   example for \ref QCPCurve, which uses \a t as sort key and \a key as main key. This is the reason
   why QCPCurve unlike QCPGraph can display parametric curves with loops.
 
   \li <tt>double mainKey() const</tt>\n Returns the variable of this data point considered the main
   key. This is commonly the variable that is used as the coordinate of this data point on the key
   axis of the plottable. This method is used for example when determining the automatic axis
   rescaling of key axes (\ref QCPAxis::rescale).
 
   \li <tt>double mainValue() const</tt>\n Returns the variable of this data point considered the
   main value. This is commonly the variable that is used as the coordinate of this data point on
   the value axis of the plottable.
 
   \li <tt>QCPRange valueRange() const</tt>\n Returns the range this data point spans in the value
   axis coordinate. If the data is single-valued (e.g. QCPGraphData), this is simply a range with
   both lower and upper set to the main data point value. However if the data points can represent
   multiple values at once (e.g QCPFinancialData with its \a high, \a low, \a open and \a close
   values at each \a key) this method should return the range those values span. This method is used
   for example when determining the automatic axis rescaling of value axes (\ref
   QCPAxis::rescale).
 */
 
 /* start documentation of inline functions */
 
 /*! \fn int QCPDataContainer<DataType>::size() const
 
   Returns the number of data points in the container.
 */
 
 /*! \fn bool QCPDataContainer<DataType>::isEmpty() const
 
   Returns whether this container holds no data points.
 */
 
 /*! \fn QCPDataContainer::const_iterator QCPDataContainer<DataType>::constBegin() const
 
   Returns a const iterator to the first data point in this container.
 */
 
 /*! \fn QCPDataContainer::const_iterator QCPDataContainer<DataType>::constEnd() const
 
   Returns a const iterator to the element past the last data point in this container.
 */
 
 /*! \fn QCPDataContainer::iterator QCPDataContainer<DataType>::begin() const
 
   Returns a non-const iterator to the first data point in this container.
 
   You can manipulate the data points in-place through the non-const iterators, but great care must
   be taken when manipulating the sort key of a data point, see \ref sort, or the detailed
   description of this class.
 */
 
 /*! \fn QCPDataContainer::iterator QCPDataContainer<DataType>::end() const
 
   Returns a non-const iterator to the element past the last data point in this container.
 
   You can manipulate the data points in-place through the non-const iterators, but great care must
   be taken when manipulating the sort key of a data point, see \ref sort, or the detailed
   description of this class.
 */
 
 /*! \fn QCPDataContainer::const_iterator QCPDataContainer<DataType>::at(int index) const
 
   Returns a const iterator to the element with the specified \a index. If \a index points beyond
   the available elements in this container, returns \ref constEnd, i.e. an iterator past the last
   valid element.
 
   You can use this method to easily obtain iterators from a \ref QCPDataRange, see the \ref
   dataselection-accessing "data selection page" for an example.
 */
 
 /*! \fn QCPDataRange QCPDataContainer::dataRange() const
 
   Returns a \ref QCPDataRange encompassing the entire data set of this container. This means the
   begin index of the returned range is 0, and the end index is \ref size.
 */
 
 /* end documentation of inline functions */
 
 /*!
   Constructs a QCPDataContainer used for plottable classes that represent a series of key-sorted
   data
 */
 template <class DataType>
 QCPDataContainer<DataType>::QCPDataContainer() : mAutoSqueeze(true), mPreallocSize(0), mPreallocIteration(0)
 {
 }
 
 /*!
   Sets whether the container automatically decides when to release memory from its post- and
   preallocation pools when data points are removed. By default this is enabled and for typical
   applications shouldn't be changed.
 
   If auto squeeze is disabled, you can manually decide when to release pre-/postallocation with
   \ref squeeze.
 */
 template <class DataType>
 void QCPDataContainer<DataType>::setAutoSqueeze(bool enabled)
 {
     if (mAutoSqueeze != enabled)
     {
         mAutoSqueeze = enabled;
         if (mAutoSqueeze)
             performAutoSqueeze();
     }
 }
 
 /*! \overload
 
   Replaces the current data in this container with the provided \a data.
 
   \see add, remove
 */
 template <class DataType>
 void QCPDataContainer<DataType>::set(const QCPDataContainer<DataType> &data)
 {
     clear();
     add(data);
 }
 
 /*! \overload
 
   Replaces the current data in this container with the provided \a data
 
   If you can guarantee that the data points in \a data have ascending order with respect to the
   DataType's sort key, set \a alreadySorted to true to avoid an unnecessary sorting run.
 
   \see add, remove
 */
 template <class DataType>
 void QCPDataContainer<DataType>::set(const QVector<DataType> &data, bool alreadySorted)
 {
     mData              = data;
     mPreallocSize      = 0;
     mPreallocIteration = 0;
     if (!alreadySorted)
         sort();
 }
 
 /*! \overload
 
   Adds the provided \a data to the current data in this container.
 
   \see set, remove
 */
 template <class DataType>
 void QCPDataContainer<DataType>::add(const QCPDataContainer<DataType> &data)
 {
     if (data.isEmpty())
         return;
 
     const int n       = data.size();
     const int oldSize = size();
 
     if (oldSize > 0 &&
         !qcpLessThanSortKey<DataType>(
             *constBegin(),
             *(data.constEnd() - 1))) // prepend if new data keys are all smaller than or equal to existing ones
     {
         if (mPreallocSize < n)
             preallocateGrow(n);
         mPreallocSize -= n;
         std::copy(data.constBegin(), data.constEnd(), begin());
     }
     else // don't need to prepend, so append and merge if necessary
     {
         mData.resize(mData.size() + n);
         std::copy(data.constBegin(), data.constEnd(), end() - n);
         if (oldSize > 0 &&
             !qcpLessThanSortKey<DataType>(
                 *(constEnd() - n - 1),
                 *(constEnd() -
                   n))) // if appended range keys aren't all greater than existing ones, merge the two partitions
             std::inplace_merge(begin(), end() - n, end(), qcpLessThanSortKey<DataType>);
     }
 }
 
 /*!
   Adds the provided data points in \a data to the current data.
 
   If you can guarantee that the data points in \a data have ascending order with respect to the
   DataType's sort key, set \a alreadySorted to true to avoid an unnecessary sorting run.
 
   \see set, remove
 */
 template <class DataType>
 void QCPDataContainer<DataType>::add(const QVector<DataType> &data, bool alreadySorted)
 {
     if (data.isEmpty())
         return;
     if (isEmpty())
     {
         set(data, alreadySorted);
         return;
     }
 
     const int n       = data.size();
     const int oldSize = size();
 
     if (alreadySorted && oldSize > 0 &&
         !qcpLessThanSortKey<DataType>(
             *constBegin(),
             *(data.constEnd() -
               1))) // prepend if new data is sorted and keys are all smaller than or equal to existing ones
     {
         if (mPreallocSize < n)
             preallocateGrow(n);
         mPreallocSize -= n;
         std::copy(data.constBegin(), data.constEnd(), begin());
     }
     else // don't need to prepend, so append and then sort and merge if necessary
     {
         mData.resize(mData.size() + n);
         std::copy(data.constBegin(), data.constEnd(), end() - n);
         if (!alreadySorted) // sort appended subrange if it wasn't already sorted
             std::sort(end() - n, end(), qcpLessThanSortKey<DataType>);
         if (oldSize > 0 &&
             !qcpLessThanSortKey<DataType>(
                 *(constEnd() - n - 1),
                 *(constEnd() -
                   n))) // if appended range keys aren't all greater than existing ones, merge the two partitions
             std::inplace_merge(begin(), end() - n, end(), qcpLessThanSortKey<DataType>);
     }
 }
 
 /*! \overload
 
   Adds the provided single data point to the current data.
 
   \see remove
 */
 template <class DataType>
 void QCPDataContainer<DataType>::add(const DataType &data)
 {
     if (isEmpty() ||
         !qcpLessThanSortKey<DataType>(
             data, *(constEnd() - 1))) // quickly handle appends if new data key is greater or equal to existing ones
     {
         mData.append(data);
     }
     else if (qcpLessThanSortKey<DataType>(data, *constBegin())) // quickly handle prepends using preallocated space
     {
         if (mPreallocSize < 1)
             preallocateGrow(1);
         --mPreallocSize;
         *begin() = data;
     }
     else // handle inserts, maintaining sorted keys
     {
         QCPDataContainer<DataType>::iterator insertionPoint =
             std::lower_bound(begin(), end(), data, qcpLessThanSortKey<DataType>);
         mData.insert(insertionPoint, data);
     }
 }
 
 /*!
   Removes all data points with (sort-)keys smaller than or equal to \a sortKey.
 
   \see removeAfter, remove, clear
 */
 template <class DataType>
 void QCPDataContainer<DataType>::removeBefore(double sortKey)
 {
     QCPDataContainer<DataType>::iterator it = begin();
     QCPDataContainer<DataType>::iterator itEnd =
         std::lower_bound(begin(), end(), DataType::fromSortKey(sortKey), qcpLessThanSortKey<DataType>);
     mPreallocSize +=
         itEnd -
         it; // don't actually delete, just add it to the preallocated block (if it gets too large, squeeze will take care of it)
     if (mAutoSqueeze)
         performAutoSqueeze();
 }
 
 /*!
   Removes all data points with (sort-)keys greater than or equal to \a sortKey.
 
   \see removeBefore, remove, clear
 */
 template <class DataType>
 void QCPDataContainer<DataType>::removeAfter(double sortKey)
 {
     QCPDataContainer<DataType>::iterator it =
         std::upper_bound(begin(), end(), DataType::fromSortKey(sortKey), qcpLessThanSortKey<DataType>);
     QCPDataContainer<DataType>::iterator itEnd = end();
     mData.erase(it, itEnd); // typically adds it to the postallocated block
     if (mAutoSqueeze)
         performAutoSqueeze();
 }
 
 /*!
   Removes all data points with (sort-)keys between \a sortKeyFrom and \a sortKeyTo. if \a
   sortKeyFrom is greater or equal to \a sortKeyTo, the function does nothing. To remove a single
   data point with known (sort-)key, use \ref remove(double sortKey).
 
   \see removeBefore, removeAfter, clear
 */
 template <class DataType>
 void QCPDataContainer<DataType>::remove(double sortKeyFrom, double sortKeyTo)
 {
     if (sortKeyFrom >= sortKeyTo || isEmpty())
         return;
 
     QCPDataContainer<DataType>::iterator it =
         std::lower_bound(begin(), end(), DataType::fromSortKey(sortKeyFrom), qcpLessThanSortKey<DataType>);
     QCPDataContainer<DataType>::iterator itEnd =
         std::upper_bound(it, end(), DataType::fromSortKey(sortKeyTo), qcpLessThanSortKey<DataType>);
     mData.erase(it, itEnd);
     if (mAutoSqueeze)
         performAutoSqueeze();
 }
 
 /*! \overload
 
   Removes a single data point at \a sortKey. If the position is not known with absolute (binary)
   precision, consider using \ref remove(double sortKeyFrom, double sortKeyTo) with a small
   fuzziness interval around the suspected position, depeding on the precision with which the
   (sort-)key is known.
 
   \see removeBefore, removeAfter, clear
 */
 template <class DataType>
 void QCPDataContainer<DataType>::remove(double sortKey)
 {
     QCPDataContainer::iterator it =
         std::lower_bound(begin(), end(), DataType::fromSortKey(sortKey), qcpLessThanSortKey<DataType>);
     if (it != end() && it->sortKey() == sortKey)
     {
         if (it == begin())
             ++mPreallocSize; // don't actually delete, just add it to the preallocated block (if it gets too large, squeeze will take care of it)
         else
             mData.erase(it);
     }
     if (mAutoSqueeze)
         performAutoSqueeze();
 }
 
 /*!
   Removes all data points.
 
   \see remove, removeAfter, removeBefore
 */
 template <class DataType>
 void QCPDataContainer<DataType>::clear()
 {
     mData.clear();
     mPreallocIteration = 0;
     mPreallocSize      = 0;
 }
 
 /*!
   Re-sorts all data points in the container by their sort key.
 
   When setting, adding or removing points using the QCPDataContainer interface (\ref set, \ref add,
   \ref remove, etc.), the container makes sure to always stay in a sorted state such that a full
   resort is never necessary. However, if you choose to directly manipulate the sort key on data
   points by accessing and modifying it through the non-const iterators (\ref begin, \ref end), it
   is your responsibility to bring the container back into a sorted state before any other methods
   are called on it. This can be achieved by calling this method immediately after finishing the
   sort key manipulation.
 */
 template <class DataType>
 void QCPDataContainer<DataType>::sort()
 {
     std::sort(begin(), end(), qcpLessThanSortKey<DataType>);
 }
 
 /*!
   Frees all unused memory that is currently in the preallocation and postallocation pools.
 
   Note that QCPDataContainer automatically decides whether squeezing is necessary, if \ref
   setAutoSqueeze is left enabled. It should thus not be necessary to use this method for typical
   applications.
 
   The parameters \a preAllocation and \a postAllocation control whether pre- and/or post allocation
   should be freed, respectively.
 */
 template <class DataType>
 void QCPDataContainer<DataType>::squeeze(bool preAllocation, bool postAllocation)
 {
     if (preAllocation)
     {
         if (mPreallocSize > 0)
         {
             std::copy(begin(), end(), mData.begin());
             mData.resize(size());
             mPreallocSize = 0;
         }
         mPreallocIteration = 0;
     }
     if (postAllocation)
         mData.squeeze();
 }
 
 /*!
   Returns an iterator to the data point with a (sort-)key that is equal to, just below, or just
   above \a sortKey. If \a expandedRange is true, the data point just below \a sortKey will be
   considered, otherwise the one just above.
 
   This can be used in conjunction with \ref findEnd to iterate over data points within a given key
   range, including or excluding the bounding data points that are just beyond the specified range.
 
   If \a expandedRange is true but there are no data points below \a sortKey, \ref constBegin is
   returned.
 
   If the container is empty, returns \ref constEnd.
 
   \see findEnd, QCPPlottableInterface1D::findBegin
 */
 template <class DataType>
 typename QCPDataContainer<DataType>::const_iterator QCPDataContainer<DataType>::findBegin(double sortKey,
                                                                                           bool expandedRange) const
 {
     if (isEmpty())
         return constEnd();
 
     QCPDataContainer<DataType>::const_iterator it =
         std::lower_bound(constBegin(), constEnd(), DataType::fromSortKey(sortKey), qcpLessThanSortKey<DataType>);
     if (expandedRange &&
         it !=
             constBegin()) // also covers it == constEnd case, and we know --constEnd is valid because mData isn't empty
         --it;
     return it;
 }
 
 /*!
   Returns an iterator to the element after the data point with a (sort-)key that is equal to, just
   above or just below \a sortKey. If \a expandedRange is true, the data point just above \a sortKey
   will be considered, otherwise the one just below.
 
   This can be used in conjunction with \ref findBegin to iterate over data points within a given
   key range, including the bounding data points that are just below and above the specified range.
 
   If \a expandedRange is true but there are no data points above \a sortKey, \ref constEnd is
   returned.
 
   If the container is empty, \ref constEnd is returned.
 
   \see findBegin, QCPPlottableInterface1D::findEnd
 */
 template <class DataType>
 typename QCPDataContainer<DataType>::const_iterator QCPDataContainer<DataType>::findEnd(double sortKey,
                                                                                         bool expandedRange) const
 {
     if (isEmpty())
         return constEnd();
 
     QCPDataContainer<DataType>::const_iterator it =
         std::upper_bound(constBegin(), constEnd(), DataType::fromSortKey(sortKey), qcpLessThanSortKey<DataType>);
     if (expandedRange && it != constEnd())
         ++it;
     return it;
 }
 
 /*!
   Returns the range encompassed by the (main-)key coordinate of all data points. The output
   parameter \a foundRange indicates whether a sensible range was found. If this is false, you
   should not use the returned QCPRange (e.g. the data container is empty or all points have the
   same key).
 
   Use \a signDomain to control which sign of the key coordinates should be considered. This is
   relevant e.g. for logarithmic plots which can mathematically only display one sign domain at a
   time.
 
   If the DataType reports that its main key is equal to the sort key (\a sortKeyIsMainKey), as is
   the case for most plottables, this method uses this fact and finds the range very quickly.
 
   \see valueRange
 */
 template <class DataType>
 QCPRange QCPDataContainer<DataType>::keyRange(bool &foundRange, QCP::SignDomain signDomain)
 {
     if (isEmpty())
     {
         foundRange = false;
         return QCPRange();
     }
     QCPRange range;
     bool haveLower = false;
     bool haveUpper = false;
     double current;
 
     QCPDataContainer<DataType>::const_iterator it    = constBegin();
     QCPDataContainer<DataType>::const_iterator itEnd = constEnd();
     if (signDomain == QCP::sdBoth) // range may be anywhere
     {
         if (DataType::
                 sortKeyIsMainKey()) // if DataType is sorted by main key (e.g. QCPGraph, but not QCPCurve), use faster algorithm by finding just first and last key with non-NaN value
         {
             while (it != itEnd) // find first non-nan going up from left
             {
                 if (!qIsNaN(it->mainValue()))
                 {
                     range.lower = it->mainKey();
                     haveLower   = true;
                     break;
                 }
                 ++it;
             }
             it = itEnd;
             while (it != constBegin()) // find first non-nan going down from right
             {
                 --it;
                 if (!qIsNaN(it->mainValue()))
                 {
                     range.upper = it->mainKey();
                     haveUpper   = true;
                     break;
                 }
             }
         }
         else // DataType is not sorted by main key, go through all data points and accordingly expand range
         {
             while (it != itEnd)
             {
                 if (!qIsNaN(it->mainValue()))
                 {
                     current = it->mainKey();
                     if (current < range.lower || !haveLower)
                     {
                         range.lower = current;
                         haveLower   = true;
                     }
                     if (current > range.upper || !haveUpper)
                     {
                         range.upper = current;
                         haveUpper   = true;
                     }
                 }
                 ++it;
             }
         }
     }
     else if (signDomain == QCP::sdNegative) // range may only be in the negative sign domain
     {
         while (it != itEnd)
         {
             if (!qIsNaN(it->mainValue()))
             {
                 current = it->mainKey();
                 if ((current < range.lower || !haveLower) && current < 0)
                 {
                     range.lower = current;
                     haveLower   = true;
                 }
                 if ((current > range.upper || !haveUpper) && current < 0)
                 {
                     range.upper = current;
                     haveUpper   = true;
                 }
             }
             ++it;
         }
     }
     else if (signDomain == QCP::sdPositive) // range may only be in the positive sign domain
     {
         while (it != itEnd)
         {
             if (!qIsNaN(it->mainValue()))
             {
                 current = it->mainKey();
                 if ((current < range.lower || !haveLower) && current > 0)
                 {
                     range.lower = current;
                     haveLower   = true;
                 }
                 if ((current > range.upper || !haveUpper) && current > 0)
                 {
                     range.upper = current;
                     haveUpper   = true;
                 }
             }
             ++it;
         }
     }
 
     foundRange = haveLower && haveUpper;
     return range;
 }
 
 /*!
   Returns the range encompassed by the value coordinates of the data points in the specified key
   range (\a inKeyRange), using the full \a DataType::valueRange reported by the data points. The
   output parameter \a foundRange indicates whether a sensible range was found. If this is false,
   you should not use the returned QCPRange (e.g. the data container is empty or all points have the
   same value).
 
   If \a inKeyRange has both lower and upper bound set to zero (is equal to <tt>QCPRange()</tt>),
   all data points are considered, without any restriction on the keys.
 
   Use \a signDomain to control which sign of the value coordinates should be considered. This is
   relevant e.g. for logarithmic plots which can mathematically only display one sign domain at a
   time.
 
   \see keyRange
 */
 template <class DataType>
 QCPRange QCPDataContainer<DataType>::valueRange(bool &foundRange, QCP::SignDomain signDomain,
                                                 const QCPRange &inKeyRange)
 {
     if (isEmpty())
     {
         foundRange = false;
         return QCPRange();
     }
     QCPRange range;
     const bool restrictKeyRange = inKeyRange != QCPRange();
     bool haveLower              = false;
     bool haveUpper              = false;
     QCPRange current;
     QCPDataContainer<DataType>::const_iterator itBegin = constBegin();
     QCPDataContainer<DataType>::const_iterator itEnd   = constEnd();
     if (DataType::sortKeyIsMainKey() && restrictKeyRange)
     {
         itBegin = findBegin(inKeyRange.lower);
         itEnd   = findEnd(inKeyRange.upper);
     }
     if (signDomain == QCP::sdBoth) // range may be anywhere
     {
         for (QCPDataContainer<DataType>::const_iterator it = itBegin; it != itEnd; ++it)
         {
             if (restrictKeyRange && (it->mainKey() < inKeyRange.lower || it->mainKey() > inKeyRange.upper))
                 continue;
             current = it->valueRange();
             if ((current.lower < range.lower || !haveLower) && !qIsNaN(current.lower))
             {
                 range.lower = current.lower;
                 haveLower   = true;
             }
             if ((current.upper > range.upper || !haveUpper) && !qIsNaN(current.upper))
             {
                 range.upper = current.upper;
                 haveUpper   = true;
             }
         }
     }
     else if (signDomain == QCP::sdNegative) // range may only be in the negative sign domain
     {
         for (QCPDataContainer<DataType>::const_iterator it = itBegin; it != itEnd; ++it)
         {
             if (restrictKeyRange && (it->mainKey() < inKeyRange.lower || it->mainKey() > inKeyRange.upper))
                 continue;
             current = it->valueRange();
             if ((current.lower < range.lower || !haveLower) && current.lower < 0 && !qIsNaN(current.lower))
             {
                 range.lower = current.lower;
                 haveLower   = true;
             }
             if ((current.upper > range.upper || !haveUpper) && current.upper < 0 && !qIsNaN(current.upper))
             {
                 range.upper = current.upper;
                 haveUpper   = true;
             }
         }
     }
     else if (signDomain == QCP::sdPositive) // range may only be in the positive sign domain
     {
         for (QCPDataContainer<DataType>::const_iterator it = itBegin; it != itEnd; ++it)
         {
             if (restrictKeyRange && (it->mainKey() < inKeyRange.lower || it->mainKey() > inKeyRange.upper))
                 continue;
             current = it->valueRange();
             if ((current.lower < range.lower || !haveLower) && current.lower > 0 && !qIsNaN(current.lower))
             {
                 range.lower = current.lower;
                 haveLower   = true;
             }
             if ((current.upper > range.upper || !haveUpper) && current.upper > 0 && !qIsNaN(current.upper))
             {
                 range.upper = current.upper;
                 haveUpper   = true;
             }
         }
     }
 
     foundRange = haveLower && haveUpper;
     return range;
 }
 
 /*!
   Makes sure \a begin and \a end mark a data range that is both within the bounds of this data
   container's data, as well as within the specified \a dataRange.
 
   This function doesn't require for \a dataRange to be within the bounds of this data container's
   valid range.
 */
 template <class DataType>
 void QCPDataContainer<DataType>::limitIteratorsToDataRange(const_iterator &begin, const_iterator &end,
                                                            const QCPDataRange &dataRange) const
 {
     QCPDataRange iteratorRange(begin - constBegin(), end - constBegin());
     iteratorRange = iteratorRange.bounded(dataRange.bounded(this->dataRange()));
     begin         = constBegin() + iteratorRange.begin();
     end           = constBegin() + iteratorRange.end();
 }
 
 /*! \internal
 
   Increases the preallocation pool to have a size of at least \a minimumPreallocSize. Depending on
   the preallocation history, the container will grow by more than requested, to speed up future
   consecutive size increases.
 
   if \a minimumPreallocSize is smaller than or equal to the current preallocation pool size, this
   method does nothing.
 */
 template <class DataType>
 void QCPDataContainer<DataType>::preallocateGrow(int minimumPreallocSize)
 {
     if (minimumPreallocSize <= mPreallocSize)
         return;
 
     int newPreallocSize = minimumPreallocSize;
     newPreallocSize += (1u << qBound(4, mPreallocIteration + 4, 15)) -
                        12; // do 4 up to 32768-12 preallocation, doubling in each intermediate iteration
     ++mPreallocIteration;
 
     int sizeDifference = newPreallocSize - mPreallocSize;
     mData.resize(mData.size() + sizeDifference);
     std::copy_backward(mData.begin() + mPreallocSize, mData.end() - sizeDifference, mData.end());
     mPreallocSize = newPreallocSize;
 }
 
 /*! \internal
 
   This method decides, depending on the total allocation size and the size of the unused pre- and
   postallocation pools, whether it is sensible to reduce the pools in order to free up unused
   memory. It then possibly calls \ref squeeze to do the deallocation.
 
   If \ref setAutoSqueeze is enabled, this method is called automatically each time data points are
   removed from the container (e.g. \ref remove).
 
   \note when changing the decision parameters, care must be taken not to cause a back-and-forth
   between squeezing and reallocation due to the growth strategy of the internal QVector and \ref
   preallocateGrow. The hysteresis between allocation and deallocation should be made high enough
   (at the expense of possibly larger unused memory from time to time).
 */
 template <class DataType>
 void QCPDataContainer<DataType>::performAutoSqueeze()
 {
     const int totalAlloc      = mData.capacity();
     const int postAllocSize   = totalAlloc - mData.size();
     const int usedSize        = size();
     bool shrinkPostAllocation = false;
     bool shrinkPreAllocation  = false;
     if (totalAlloc > 650000) // if allocation is larger, shrink earlier with respect to total used size
     {
         shrinkPostAllocation =
             postAllocSize > usedSize * 1.5; // QVector grow strategy is 2^n for static data. Watch out not to oscillate!
         shrinkPreAllocation = mPreallocSize * 10 > usedSize;
     }
     else if (totalAlloc >
              1000) // below 10 MiB raw data be generous with preallocated memory, below 1k points don't even bother
     {
         shrinkPostAllocation = postAllocSize > usedSize * 5;
         shrinkPreAllocation =
             mPreallocSize > usedSize * 1.5; // preallocation can grow into postallocation, so can be smaller
     }
 
     if (shrinkPreAllocation || shrinkPostAllocation)
         squeeze(shrinkPreAllocation, shrinkPostAllocation);
 }
 /* end of 'src/datacontainer.cpp' */
 
 /* end of 'src/datacontainer.h' */
 
 /* including file 'src/plottable.h', size 8312                               */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPSelectionDecorator
 {
     Q_GADGET
   public:
     QCPSelectionDecorator();
     virtual ~QCPSelectionDecorator();
 
     // getters:
     QPen pen() const { return mPen; }
     QBrush brush() const { return mBrush; }
     QCPScatterStyle scatterStyle() const { return mScatterStyle; }
     QCPScatterStyle::ScatterProperties usedScatterProperties() const { return mUsedScatterProperties; }
 
     // setters:
     void setPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setScatterStyle(const QCPScatterStyle &scatterStyle,
                          QCPScatterStyle::ScatterProperties usedProperties = QCPScatterStyle::spPen);
     void setUsedScatterProperties(const QCPScatterStyle::ScatterProperties &properties);
 
     // non-virtual methods:
     void applyPen(QCPPainter *painter) const;
     void applyBrush(QCPPainter *painter) const;
     QCPScatterStyle getFinalScatterStyle(const QCPScatterStyle &unselectedStyle) const;
 
     // introduced virtual methods:
     virtual void copyFrom(const QCPSelectionDecorator *other);
     virtual void drawDecoration(QCPPainter *painter, QCPDataSelection selection);
 
   protected:
     // property members:
     QPen mPen;
     QBrush mBrush;
     QCPScatterStyle mScatterStyle;
     QCPScatterStyle::ScatterProperties mUsedScatterProperties;
     // non-property members:
     QCPAbstractPlottable *mPlottable;
 
     // introduced virtual methods:
     virtual bool registerWithPlottable(QCPAbstractPlottable *plottable);
 
   private:
     Q_DISABLE_COPY(QCPSelectionDecorator)
     friend class QCPAbstractPlottable;
 };
 Q_DECLARE_METATYPE(QCPSelectionDecorator *)
 
 class QCP_LIB_DECL QCPAbstractPlottable : public QCPLayerable
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QString name READ name WRITE setName)
     Q_PROPERTY(bool antialiasedFill READ antialiasedFill WRITE setAntialiasedFill)
     Q_PROPERTY(bool antialiasedScatters READ antialiasedScatters WRITE setAntialiasedScatters)
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QBrush brush READ brush WRITE setBrush)
     Q_PROPERTY(QCPAxis *keyAxis READ keyAxis WRITE setKeyAxis)
     Q_PROPERTY(QCPAxis *valueAxis READ valueAxis WRITE setValueAxis)
     Q_PROPERTY(QCP::SelectionType selectable READ selectable WRITE setSelectable NOTIFY selectableChanged)
     Q_PROPERTY(QCPDataSelection selection READ selection WRITE setSelection NOTIFY selectionChanged)
     Q_PROPERTY(QCPSelectionDecorator *selectionDecorator READ selectionDecorator WRITE setSelectionDecorator)
     /// \endcond
   public:
     QCPAbstractPlottable(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPAbstractPlottable() override;
 
     // getters:
     QString name() const { return mName; }
     bool antialiasedFill() const { return mAntialiasedFill; }
     bool antialiasedScatters() const { return mAntialiasedScatters; }
     QPen pen() const { return mPen; }
     QBrush brush() const { return mBrush; }
     QCPAxis *keyAxis() const { return mKeyAxis.data(); }
     QCPAxis *valueAxis() const { return mValueAxis.data(); }
     QCP::SelectionType selectable() const { return mSelectable; }
     bool selected() const { return !mSelection.isEmpty(); }
     QCPDataSelection selection() const { return mSelection; }
     QCPSelectionDecorator *selectionDecorator() const { return mSelectionDecorator; }
 
     // setters:
     void setName(const QString &name);
     void setAntialiasedFill(bool enabled);
     void setAntialiasedScatters(bool enabled);
     void setPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setKeyAxis(QCPAxis *axis);
     void setValueAxis(QCPAxis *axis);
     Q_SLOT void setSelectable(QCP::SelectionType selectable);
     Q_SLOT void setSelection(QCPDataSelection selection);
     void setSelectionDecorator(QCPSelectionDecorator *decorator);
 
     // introduced virtual methods:
-    virtual QCPPlottableInterface1D *interface1D() { return 0; }
+    virtual QCPPlottableInterface1D *interface1D() { return nullptr; }
     virtual QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const = 0;
     virtual QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const                    = 0;
 
     // non-property methods:
     void coordsToPixels(double key, double value, double &x, double &y) const;
     const QPointF coordsToPixels(double key, double value) const;
     void pixelsToCoords(double x, double y, double &key, double &value) const;
     void pixelsToCoords(const QPointF &pixelPos, double &key, double &value) const;
     void rescaleAxes(bool onlyEnlarge = false) const;
     void rescaleKeyAxis(bool onlyEnlarge = false) const;
     void rescaleValueAxis(bool onlyEnlarge = false, bool inKeyRange = false) const;
     bool addToLegend(QCPLegend *legend);
     bool addToLegend();
     bool removeFromLegend(QCPLegend *legend) const;
     bool removeFromLegend() const;
 
   signals:
     void selectionChanged(bool selected);
     void selectionChanged(const QCPDataSelection &selection);
     void selectableChanged(QCP::SelectionType selectable);
 
   protected:
     // property members:
     QString mName;
     bool mAntialiasedFill, mAntialiasedScatters;
     QPen mPen;
     QBrush mBrush;
     QPointer<QCPAxis> mKeyAxis, mValueAxis;
     QCP::SelectionType mSelectable;
     QCPDataSelection mSelection;
     QCPSelectionDecorator *mSelectionDecorator;
 
     // reimplemented virtual methods:
     QRect clipRect() const override;
     void draw(QCPPainter *painter) override = 0;
     QCP::Interaction selectionCategory() const override;
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     // events:
     void selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                              bool *selectionStateChanged) override;
     void deselectEvent(bool *selectionStateChanged) override;
 
     // introduced virtual methods:
     virtual void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const = 0;
 
     // non-virtual methods:
     void applyFillAntialiasingHint(QCPPainter *painter) const;
     void applyScattersAntialiasingHint(QCPPainter *painter) const;
 
   private:
     Q_DISABLE_COPY(QCPAbstractPlottable)
 
     friend class QCustomPlot;
     friend class QCPAxis;
     friend class QCPPlottableLegendItem;
 };
 
 /* end of 'src/plottable.h' */
 
 /* including file 'src/item.h', size 9368                                    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemAnchor
 {
     Q_GADGET
   public:
     QCPItemAnchor(QCustomPlot *parentPlot, QCPAbstractItem *parentItem, const QString &name, int anchorId = -1);
     virtual ~QCPItemAnchor();
 
     // getters:
     QString name() const { return mName; }
     virtual QPointF pixelPosition() const;
 
   protected:
     // property members:
     QString mName;
 
     // non-property members:
     QCustomPlot *mParentPlot;
     QCPAbstractItem *mParentItem;
     int mAnchorId;
     QSet<QCPItemPosition *> mChildrenX, mChildrenY;
 
     // introduced virtual methods:
-    virtual QCPItemPosition *toQCPItemPosition() { return 0; }
+    virtual QCPItemPosition *toQCPItemPosition() { return nullptr; }
 
     // non-virtual methods:
     void addChildX(QCPItemPosition *pos);    // called from pos when this anchor is set as parent
     void removeChildX(QCPItemPosition *pos); // called from pos when its parent anchor is reset or pos deleted
     void addChildY(QCPItemPosition *pos);    // called from pos when this anchor is set as parent
     void removeChildY(QCPItemPosition *pos); // called from pos when its parent anchor is reset or pos deleted
 
   private:
     Q_DISABLE_COPY(QCPItemAnchor)
 
     friend class QCPItemPosition;
 };
 
 class QCP_LIB_DECL QCPItemPosition : public QCPItemAnchor
 {
     Q_GADGET
   public:
     /*!
           Defines the ways an item position can be specified. Thus it defines what the numbers passed to
           \ref setCoords actually mean.
 
           \see setType
         */
     enum PositionType
     {
         ptAbsolute ///< Static positioning in pixels, starting from the top left corner of the viewport/widget.
         ,
         ptViewportRatio ///< Static positioning given by a fraction of the viewport size. For example, if you call setCoords(0, 0), the position will be at the top
         ///< left corner of the viewport/widget. setCoords(1, 1) will be at the bottom right corner, setCoords(0.5, 0) will be horizontally centered and
         ///< vertically at the top of the viewport/widget, etc.
         ,
         ptAxisRectRatio ///< Static positioning given by a fraction of the axis rect size (see \ref setAxisRect). For example, if you call setCoords(0, 0), the position will be at the top
         ///< left corner of the axis rect. setCoords(1, 1) will be at the bottom right corner, setCoords(0.5, 0) will be horizontally centered and
         ///< vertically at the top of the axis rect, etc. You can also go beyond the axis rect by providing negative coordinates or coordinates larger than 1.
         ,
         ptPlotCoords ///< Dynamic positioning at a plot coordinate defined by two axes (see \ref setAxes).
     };
     Q_ENUM(PositionType)
 
     QCPItemPosition(QCustomPlot *parentPlot, QCPAbstractItem *parentItem, const QString &name);
     ~QCPItemPosition() override;
 
     // getters:
     PositionType type() const { return typeX(); }
     PositionType typeX() const { return mPositionTypeX; }
     PositionType typeY() const { return mPositionTypeY; }
     QCPItemAnchor *parentAnchor() const { return parentAnchorX(); }
     QCPItemAnchor *parentAnchorX() const { return mParentAnchorX; }
     QCPItemAnchor *parentAnchorY() const { return mParentAnchorY; }
     double key() const { return mKey; }
     double value() const { return mValue; }
     QPointF coords() const { return QPointF(mKey, mValue); }
     QCPAxis *keyAxis() const { return mKeyAxis.data(); }
     QCPAxis *valueAxis() const { return mValueAxis.data(); }
     QCPAxisRect *axisRect() const;
     QPointF pixelPosition() const override;
 
     // setters:
     void setType(PositionType type);
     void setTypeX(PositionType type);
     void setTypeY(PositionType type);
     bool setParentAnchor(QCPItemAnchor *parentAnchor, bool keepPixelPosition = false);
     bool setParentAnchorX(QCPItemAnchor *parentAnchor, bool keepPixelPosition = false);
     bool setParentAnchorY(QCPItemAnchor *parentAnchor, bool keepPixelPosition = false);
     void setCoords(double key, double value);
     void setCoords(const QPointF &coords);
     void setAxes(QCPAxis *keyAxis, QCPAxis *valueAxis);
     void setAxisRect(QCPAxisRect *axisRect);
     void setPixelPosition(const QPointF &pixelPosition);
 
   protected:
     // property members:
     PositionType mPositionTypeX, mPositionTypeY;
     QPointer<QCPAxis> mKeyAxis, mValueAxis;
     QPointer<QCPAxisRect> mAxisRect;
     double mKey, mValue;
     QCPItemAnchor *mParentAnchorX, *mParentAnchorY;
 
     // reimplemented virtual methods:
     QCPItemPosition *toQCPItemPosition() override { return this; }
 
   private:
     Q_DISABLE_COPY(QCPItemPosition)
 };
 Q_DECLARE_METATYPE(QCPItemPosition::PositionType)
 
 class QCP_LIB_DECL QCPAbstractItem : public QCPLayerable
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(bool clipToAxisRect READ clipToAxisRect WRITE setClipToAxisRect)
     Q_PROPERTY(QCPAxisRect *clipAxisRect READ clipAxisRect WRITE setClipAxisRect)
     Q_PROPERTY(bool selectable READ selectable WRITE setSelectable NOTIFY selectableChanged)
     Q_PROPERTY(bool selected READ selected WRITE setSelected NOTIFY selectionChanged)
     /// \endcond
   public:
     explicit QCPAbstractItem(QCustomPlot *parentPlot);
     ~QCPAbstractItem() override;
 
     // getters:
     bool clipToAxisRect() const { return mClipToAxisRect; }
     QCPAxisRect *clipAxisRect() const;
     bool selectable() const { return mSelectable; }
     bool selected() const { return mSelected; }
 
     // setters:
     void setClipToAxisRect(bool clip);
     void setClipAxisRect(QCPAxisRect *rect);
     Q_SLOT void setSelectable(bool selectable);
     Q_SLOT void setSelected(bool selected);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override = 0;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override = 0;
 
     // non-virtual methods:
     QList<QCPItemPosition *> positions() const { return mPositions; }
     QList<QCPItemAnchor *> anchors() const { return mAnchors; }
     QCPItemPosition *position(const QString &name) const;
     QCPItemAnchor *anchor(const QString &name) const;
     bool hasAnchor(const QString &name) const;
 
   signals:
     void selectionChanged(bool selected);
     void selectableChanged(bool selectable);
 
   protected:
     // property members:
     bool mClipToAxisRect;
     QPointer<QCPAxisRect> mClipAxisRect;
     QList<QCPItemPosition *> mPositions;
     QList<QCPItemAnchor *> mAnchors;
     bool mSelectable, mSelected;
 
     // reimplemented virtual methods:
     QCP::Interaction selectionCategory() const override;
     QRect clipRect() const override;
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     void draw(QCPPainter *painter) override = 0;
     // events:
     void selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                              bool *selectionStateChanged) override;
     void deselectEvent(bool *selectionStateChanged) override;
 
     // introduced virtual methods:
     virtual QPointF anchorPixelPosition(int anchorId) const;
 
     // non-virtual methods:
     double rectDistance(const QRectF &rect, const QPointF &pos, bool filledRect) const;
     QCPItemPosition *createPosition(const QString &name);
     QCPItemAnchor *createAnchor(const QString &name, int anchorId);
 
   private:
     Q_DISABLE_COPY(QCPAbstractItem)
 
     friend class QCustomPlot;
     friend class QCPItemAnchor;
 };
 
 /* end of 'src/item.h' */
 
 /* including file 'src/core.h', size 14797                                   */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCustomPlot : public QWidget
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QRect viewport READ viewport WRITE setViewport)
     Q_PROPERTY(QPixmap background READ background WRITE setBackground)
     Q_PROPERTY(bool backgroundScaled READ backgroundScaled WRITE setBackgroundScaled)
     Q_PROPERTY(Qt::AspectRatioMode backgroundScaledMode READ backgroundScaledMode WRITE setBackgroundScaledMode)
     Q_PROPERTY(QCPLayoutGrid *plotLayout READ plotLayout)
     Q_PROPERTY(bool autoAddPlottableToLegend READ autoAddPlottableToLegend WRITE setAutoAddPlottableToLegend)
     Q_PROPERTY(int selectionTolerance READ selectionTolerance WRITE setSelectionTolerance)
     Q_PROPERTY(bool noAntialiasingOnDrag READ noAntialiasingOnDrag WRITE setNoAntialiasingOnDrag)
     Q_PROPERTY(Qt::KeyboardModifier multiSelectModifier READ multiSelectModifier WRITE setMultiSelectModifier)
     Q_PROPERTY(bool openGl READ openGl WRITE setOpenGl)
     /// \endcond
   public:
     /*!
           Defines how a layer should be inserted relative to an other layer.
 
           \see addLayer, moveLayer
         */
     enum LayerInsertMode
     {
         limBelow ///< Layer is inserted below other layer
         ,
         limAbove ///< Layer is inserted above other layer
     };
     Q_ENUM(LayerInsertMode)
 
     /*!
           Defines with what timing the QCustomPlot surface is refreshed after a replot.
 
           \see replot
         */
     enum RefreshPriority
     {
         rpImmediateRefresh ///< Replots immediately and repaints the widget immediately by calling QWidget::repaint() after the replot
         ,
         rpQueuedRefresh ///< Replots immediately, but queues the widget repaint, by calling QWidget::update() after the replot. This way multiple redundant widget repaints can be avoided.
         ,
         rpRefreshHint ///< Whether to use immediate or queued refresh depends on whether the plotting hint \ref QCP::phImmediateRefresh is set, see \ref setPlottingHints.
         ,
         rpQueuedReplot ///< Queues the entire replot for the next event loop iteration. This way multiple redundant replots can be avoided. The actual replot is then done with \ref rpRefreshHint priority.
     };
     Q_ENUM(RefreshPriority)
 
-    explicit QCustomPlot(QWidget *parent = 0);
+    explicit QCustomPlot(QWidget *parent = nullptr);
     ~QCustomPlot() override;
 
     // getters:
     QRect viewport() const { return mViewport; }
     double bufferDevicePixelRatio() const { return mBufferDevicePixelRatio; }
     QPixmap background() const { return mBackgroundPixmap; }
     bool backgroundScaled() const { return mBackgroundScaled; }
     Qt::AspectRatioMode backgroundScaledMode() const { return mBackgroundScaledMode; }
     QCPLayoutGrid *plotLayout() const { return mPlotLayout; }
     QCP::AntialiasedElements antialiasedElements() const { return mAntialiasedElements; }
     QCP::AntialiasedElements notAntialiasedElements() const { return mNotAntialiasedElements; }
     bool autoAddPlottableToLegend() const { return mAutoAddPlottableToLegend; }
     const QCP::Interactions interactions() const { return mInteractions; }
     int selectionTolerance() const { return mSelectionTolerance; }
     bool noAntialiasingOnDrag() const { return mNoAntialiasingOnDrag; }
     QCP::PlottingHints plottingHints() const { return mPlottingHints; }
     Qt::KeyboardModifier multiSelectModifier() const { return mMultiSelectModifier; }
     QCP::SelectionRectMode selectionRectMode() const { return mSelectionRectMode; }
     QCPSelectionRect *selectionRect() const { return mSelectionRect; }
     bool openGl() const { return mOpenGl; }
 
     // setters:
     void setViewport(const QRect &rect);
     void setBufferDevicePixelRatio(double ratio);
     void setBackground(const QPixmap &pm);
     void setBackground(const QPixmap &pm, bool scaled, Qt::AspectRatioMode mode = Qt::KeepAspectRatioByExpanding);
     void setBackground(const QBrush &brush);
     void setBackgroundScaled(bool scaled);
     void setBackgroundScaledMode(Qt::AspectRatioMode mode);
     void setAntialiasedElements(const QCP::AntialiasedElements &antialiasedElements);
     void setAntialiasedElement(QCP::AntialiasedElement antialiasedElement, bool enabled = true);
     void setNotAntialiasedElements(const QCP::AntialiasedElements &notAntialiasedElements);
     void setNotAntialiasedElement(QCP::AntialiasedElement notAntialiasedElement, bool enabled = true);
     void setAutoAddPlottableToLegend(bool on);
     void setInteractions(const QCP::Interactions &interactions);
     void setInteraction(const QCP::Interaction &interaction, bool enabled = true);
     void setSelectionTolerance(int pixels);
     void setNoAntialiasingOnDrag(bool enabled);
     void setPlottingHints(const QCP::PlottingHints &hints);
     void setPlottingHint(QCP::PlottingHint hint, bool enabled = true);
     void setMultiSelectModifier(Qt::KeyboardModifier modifier);
     void setSelectionRectMode(QCP::SelectionRectMode mode);
     void setSelectionRect(QCPSelectionRect *selectionRect);
     void setOpenGl(bool enabled, int multisampling = 16);
 
     // non-property methods:
     // plottable interface:
     QCPAbstractPlottable *plottable(int index);
     QCPAbstractPlottable *plottable();
     bool removePlottable(QCPAbstractPlottable *plottable);
     bool removePlottable(int index);
     int clearPlottables();
     int plottableCount() const;
     QList<QCPAbstractPlottable *> selectedPlottables() const;
     QCPAbstractPlottable *plottableAt(const QPointF &pos, bool onlySelectable = false) const;
     bool hasPlottable(QCPAbstractPlottable *plottable) const;
 
     // specialized interface for QCPGraph:
     QCPGraph *graph(int index) const;
     QCPGraph *graph() const;
-    QCPGraph *addGraph(QCPAxis *keyAxis = 0, QCPAxis *valueAxis = 0);
+    QCPGraph *addGraph(QCPAxis *keyAxis = nullptr, QCPAxis *valueAxis = nullptr);
     bool removeGraph(QCPGraph *graph);
     bool removeGraph(int index);
     int clearGraphs();
     int graphCount() const;
     QList<QCPGraph *> selectedGraphs() const;
 
     // item interface:
     QCPAbstractItem *item(int index) const;
     QCPAbstractItem *item() const;
     bool removeItem(QCPAbstractItem *item);
     bool removeItem(int index);
     int clearItems();
     int itemCount() const;
     QList<QCPAbstractItem *> selectedItems() const;
     QCPAbstractItem *itemAt(const QPointF &pos, bool onlySelectable = false) const;
     bool hasItem(QCPAbstractItem *item) const;
 
     // layer interface:
     QCPLayer *layer(const QString &name) const;
     QCPLayer *layer(int index) const;
     QCPLayer *currentLayer() const;
     bool setCurrentLayer(const QString &name);
     bool setCurrentLayer(QCPLayer *layer);
     int layerCount() const;
-    bool addLayer(const QString &name, QCPLayer *otherLayer = 0, LayerInsertMode insertMode = limAbove);
+    bool addLayer(const QString &name, QCPLayer *otherLayer = nullptr, LayerInsertMode insertMode = limAbove);
     bool removeLayer(QCPLayer *layer);
     bool moveLayer(QCPLayer *layer, QCPLayer *otherLayer, LayerInsertMode insertMode = limAbove);
 
     // axis rect/layout interface:
     int axisRectCount() const;
     QCPAxisRect *axisRect(int index = 0) const;
     QList<QCPAxisRect *> axisRects() const;
     QCPLayoutElement *layoutElementAt(const QPointF &pos) const;
     QCPAxisRect *axisRectAt(const QPointF &pos) const;
     Q_SLOT void rescaleAxes(bool onlyVisiblePlottables = false);
 
     QList<QCPAxis *> selectedAxes() const;
     QList<QCPLegend *> selectedLegends() const;
     Q_SLOT void deselectAll();
 
     bool savePdf(const QString &fileName, int width = 0, int height = 0,
                  QCP::ExportPen exportPen = QCP::epAllowCosmetic, const QString &pdfCreator = QString(),
                  const QString &pdfTitle = QString());
     bool savePng(const QString &fileName, int width = 0, int height = 0, double scale = 1.0, int quality = -1,
                  int resolution = 96, QCP::ResolutionUnit resolutionUnit = QCP::ruDotsPerInch);
     bool saveJpg(const QString &fileName, int width = 0, int height = 0, double scale = 1.0, int quality = -1,
                  int resolution = 96, QCP::ResolutionUnit resolutionUnit = QCP::ruDotsPerInch);
     bool saveBmp(const QString &fileName, int width = 0, int height = 0, double scale = 1.0, int resolution = 96,
                  QCP::ResolutionUnit resolutionUnit = QCP::ruDotsPerInch);
     bool saveRastered(const QString &fileName, int width, int height, double scale, const char *format,
                       int quality = -1, int resolution = 96, QCP::ResolutionUnit resolutionUnit = QCP::ruDotsPerInch);
     QPixmap toPixmap(int width = 0, int height = 0, double scale = 1.0);
     void toPainter(QCPPainter *painter, int width = 0, int height = 0);
     Q_SLOT void replot(QCustomPlot::RefreshPriority refreshPriority = QCustomPlot::rpRefreshHint);
 
     QCPAxis *xAxis, *yAxis, *xAxis2, *yAxis2;
     QCPLegend *legend;
 
   signals:
     void mouseDoubleClick(QMouseEvent *event);
     void mousePress(QMouseEvent *event);
     void mouseMove(QMouseEvent *event);
     void mouseRelease(QMouseEvent *event);
     void mouseWheel(QWheelEvent *event);
 
     void plottableClick(QCPAbstractPlottable *plottable, int dataIndex, QMouseEvent *event);
     void plottableDoubleClick(QCPAbstractPlottable *plottable, int dataIndex, QMouseEvent *event);
     void itemClick(QCPAbstractItem *item, QMouseEvent *event);
     void itemDoubleClick(QCPAbstractItem *item, QMouseEvent *event);
     void axisClick(QCPAxis *axis, QCPAxis::SelectablePart part, QMouseEvent *event);
     void axisDoubleClick(QCPAxis *axis, QCPAxis::SelectablePart part, QMouseEvent *event);
     void legendClick(QCPLegend *legend, QCPAbstractLegendItem *item, QMouseEvent *event);
     void legendDoubleClick(QCPLegend *legend, QCPAbstractLegendItem *item, QMouseEvent *event);
 
     void selectionChangedByUser();
     void beforeReplot();
     void afterReplot();
 
   protected:
     // property members:
     QRect mViewport;
     double mBufferDevicePixelRatio;
     QCPLayoutGrid *mPlotLayout;
     bool mAutoAddPlottableToLegend;
     QList<QCPAbstractPlottable *> mPlottables;
     QList<QCPGraph *> mGraphs; // extra list of plottables also in mPlottables that are of type QCPGraph
     QList<QCPAbstractItem *> mItems;
     QList<QCPLayer *> mLayers;
     QCP::AntialiasedElements mAntialiasedElements, mNotAntialiasedElements;
     QCP::Interactions mInteractions;
     int mSelectionTolerance;
     bool mNoAntialiasingOnDrag;
     QBrush mBackgroundBrush;
     QPixmap mBackgroundPixmap;
     QPixmap mScaledBackgroundPixmap;
     bool mBackgroundScaled;
     Qt::AspectRatioMode mBackgroundScaledMode;
     QCPLayer *mCurrentLayer;
     QCP::PlottingHints mPlottingHints;
     Qt::KeyboardModifier mMultiSelectModifier;
     QCP::SelectionRectMode mSelectionRectMode;
     QCPSelectionRect *mSelectionRect;
     bool mOpenGl;
 
     // non-property members:
     QList<QSharedPointer<QCPAbstractPaintBuffer>> mPaintBuffers;
     QPoint mMousePressPos;
     bool mMouseHasMoved;
     QPointer<QCPLayerable> mMouseEventLayerable;
     QVariant mMouseEventLayerableDetails;
     bool mReplotting;
     bool mReplotQueued;
     int mOpenGlMultisamples;
     QCP::AntialiasedElements mOpenGlAntialiasedElementsBackup;
     bool mOpenGlCacheLabelsBackup;
 #ifdef QCP_OPENGL_FBO
     QSharedPointer<QOpenGLContext> mGlContext;
     QSharedPointer<QSurface> mGlSurface;
     QSharedPointer<QOpenGLPaintDevice> mGlPaintDevice;
 #endif
 
     // reimplemented virtual methods:
     QSize minimumSizeHint() const override;
     QSize sizeHint() const override;
     void paintEvent(QPaintEvent *event) override;
     void resizeEvent(QResizeEvent *event) override;
     bool event(QEvent *event) override;
     void mouseDoubleClickEvent(QMouseEvent *event) override;
     void mousePressEvent(QMouseEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;
     void wheelEvent(QWheelEvent *event) override;
 
     // introduced virtual methods:
     virtual void draw(QCPPainter *painter);
     virtual void updateLayout();
     virtual void axisRemoved(QCPAxis *axis);
     virtual void legendRemoved(QCPLegend *legend);
     Q_SLOT virtual void processRectSelection(QRect rect, QMouseEvent *event);
     Q_SLOT virtual void processRectZoom(QRect rect, QMouseEvent *event);
     Q_SLOT virtual void processPointSelection(QMouseEvent *event);
 
     // non-virtual methods:
     bool registerPlottable(QCPAbstractPlottable *plottable);
     bool registerGraph(QCPGraph *graph);
     bool registerItem(QCPAbstractItem *item);
     void updateLayerIndices() const;
-    QCPLayerable *layerableAt(const QPointF &pos, bool onlySelectable, QVariant *selectionDetails = 0) const;
+    QCPLayerable *layerableAt(const QPointF &pos, bool onlySelectable, QVariant *selectionDetails = nullptr) const;
     QList<QCPLayerable *> layerableListAt(const QPointF &pos, bool onlySelectable,
-                                          QList<QVariant> *selectionDetails = 0) const;
+                                          QList<QVariant> *selectionDetails = nullptr) const;
     void drawBackground(QCPPainter *painter);
     void setupPaintBuffers();
     QCPAbstractPaintBuffer *createPaintBuffer();
     bool hasInvalidatedPaintBuffers();
     bool setupOpenGl();
     void freeOpenGl();
 
     friend class QCPLegend;
     friend class QCPAxis;
     friend class QCPLayer;
     friend class QCPAxisRect;
     friend class QCPAbstractPlottable;
     friend class QCPGraph;
     friend class QCPAbstractItem;
 };
 Q_DECLARE_METATYPE(QCustomPlot::LayerInsertMode)
 Q_DECLARE_METATYPE(QCustomPlot::RefreshPriority)
 
 /* end of 'src/core.h' */
 
 /* including file 'src/plottable1d.h', size 4250                             */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPPlottableInterface1D
 {
   public:
     // introduced pure virtual methods:
     virtual int dataCount() const                                                          = 0;
     virtual double dataMainKey(int index) const                                            = 0;
     virtual double dataSortKey(int index) const                                            = 0;
     virtual double dataMainValue(int index) const                                          = 0;
     virtual QCPRange dataValueRange(int index) const                                       = 0;
     virtual QPointF dataPixelPosition(int index) const                                     = 0;
     virtual bool sortKeyIsMainKey() const                                                  = 0;
     virtual QCPDataSelection selectTestRect(const QRectF &rect, bool onlySelectable) const = 0;
     virtual int findBegin(double sortKey, bool expandedRange = true) const                 = 0;
     virtual int findEnd(double sortKey, bool expandedRange = true) const                   = 0;
 };
 
 template <class DataType>
 class QCP_LIB_DECL QCPAbstractPlottable1D : public QCPAbstractPlottable, public QCPPlottableInterface1D
 {
     // No Q_OBJECT macro due to template class
 
   public:
     QCPAbstractPlottable1D(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPAbstractPlottable1D() override;
 
     // virtual methods of 1d plottable interface:
     int dataCount() const override;
     double dataMainKey(int index) const override;
     double dataSortKey(int index) const override;
     double dataMainValue(int index) const override;
     QCPRange dataValueRange(int index) const override;
     QPointF dataPixelPosition(int index) const override;
     bool sortKeyIsMainKey() const override;
     QCPDataSelection selectTestRect(const QRectF &rect, bool onlySelectable) const override;
     int findBegin(double sortKey, bool expandedRange = true) const override;
     int findEnd(double sortKey, bool expandedRange = true) const override;
 
     // virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPPlottableInterface1D *interface1D() override { return this; }
 
   protected:
     // property members:
     QSharedPointer<QCPDataContainer<DataType>> mDataContainer;
 
     // helpers for subclasses:
     void getDataSegments(QList<QCPDataRange> &selectedSegments, QList<QCPDataRange> &unselectedSegments) const;
     void drawPolyline(QCPPainter *painter, const QVector<QPointF> &lineData) const;
 
   private:
     Q_DISABLE_COPY(QCPAbstractPlottable1D)
 };
 
 // include implementation in header since it is a class template:
 
 /* including file 'src/plottable1d.cpp', size 22240                          */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPPlottableInterface1D
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPPlottableInterface1D
   \brief Defines an abstract interface for one-dimensional plottables
 
   This class contains only pure virtual methods which define a common interface to the data
   of one-dimensional plottables.
 
   For example, it is implemented by the template class \ref QCPAbstractPlottable1D (the preferred
   base class for one-dimensional plottables). So if you use that template class as base class of
   your one-dimensional plottable, you won't have to care about implementing the 1d interface
   yourself.
 
   If your plottable doesn't derive from \ref QCPAbstractPlottable1D but still wants to provide a 1d
   interface (e.g. like \ref QCPErrorBars does), you should inherit from both \ref
   QCPAbstractPlottable and \ref QCPPlottableInterface1D and accordingly reimplement the pure
   virtual methods of the 1d interface, matching your data container. Also, reimplement \ref
   QCPAbstractPlottable::interface1D to return the \c this pointer.
 
   If you have a \ref QCPAbstractPlottable pointer, you can check whether it implements this
   interface by calling \ref QCPAbstractPlottable::interface1D and testing it for a non-zero return
   value. If it indeed implements this interface, you may use it to access the plottable's data
   without needing to know the exact type of the plottable or its data point type.
 */
 
 /* start documentation of pure virtual functions */
 
 /*! \fn virtual int QCPPlottableInterface1D::dataCount() const = 0;
 
   Returns the number of data points of the plottable.
 */
 
 /*! \fn virtual QCPDataSelection QCPPlottableInterface1D::selectTestRect(const QRectF &rect, bool onlySelectable) const = 0;
 
   Returns a data selection containing all the data points of this plottable which are contained (or
   hit by) \a rect. This is used mainly in the selection rect interaction for data selection (\ref
   dataselection "data selection mechanism").
 
   If \a onlySelectable is true, an empty QCPDataSelection is returned if this plottable is not
   selectable (i.e. if \ref QCPAbstractPlottable::setSelectable is \ref QCP::stNone).
 
   \note \a rect must be a normalized rect (positive or zero width and height). This is especially
   important when using the rect of \ref QCPSelectionRect::accepted, which is not necessarily
   normalized. Use <tt>QRect::normalized()</tt> when passing a rect which might not be normalized.
 */
 
 /*! \fn virtual double QCPPlottableInterface1D::dataMainKey(int index) const = 0
 
   Returns the main key of the data point at the given \a index.
 
   What the main key is, is defined by the plottable's data type. See the \ref
   qcpdatacontainer-datatype "QCPDataContainer DataType" documentation for details about this naming
   convention.
 */
 
 /*! \fn virtual double QCPPlottableInterface1D::dataSortKey(int index) const = 0
 
   Returns the sort key of the data point at the given \a index.
 
   What the sort key is, is defined by the plottable's data type. See the \ref
   qcpdatacontainer-datatype "QCPDataContainer DataType" documentation for details about this naming
   convention.
 */
 
 /*! \fn virtual double QCPPlottableInterface1D::dataMainValue(int index) const = 0
 
   Returns the main value of the data point at the given \a index.
 
   What the main value is, is defined by the plottable's data type. See the \ref
   qcpdatacontainer-datatype "QCPDataContainer DataType" documentation for details about this naming
   convention.
 */
 
 /*! \fn virtual QCPRange QCPPlottableInterface1D::dataValueRange(int index) const = 0
 
   Returns the value range of the data point at the given \a index.
 
   What the value range is, is defined by the plottable's data type. See the \ref
   qcpdatacontainer-datatype "QCPDataContainer DataType" documentation for details about this naming
   convention.
 */
 
 /*! \fn virtual QPointF QCPPlottableInterface1D::dataPixelPosition(int index) const = 0
 
   Returns the pixel position on the widget surface at which the data point at the given \a index
   appears.
 
   Usually this corresponds to the point of \ref dataMainKey/\ref dataMainValue, in pixel
   coordinates. However, depending on the plottable, this might be a different apparent position
   than just a coord-to-pixel transform of those values. For example, \ref QCPBars apparent data
   values can be shifted depending on their stacking, bar grouping or configured base value.
 */
 
 /*! \fn virtual bool QCPPlottableInterface1D::sortKeyIsMainKey() const = 0
 
   Returns whether the sort key (\ref dataSortKey) is identical to the main key (\ref dataMainKey).
 
   What the sort and main keys are, is defined by the plottable's data type. See the \ref
   qcpdatacontainer-datatype "QCPDataContainer DataType" documentation for details about this naming
   convention.
 */
 
 /*! \fn virtual int QCPPlottableInterface1D::findBegin(double sortKey, bool expandedRange) const = 0
 
   Returns the index of the data point with a (sort-)key that is equal to, just below, or just above
   \a sortKey. If \a expandedRange is true, the data point just below \a sortKey will be considered,
   otherwise the one just above.
 
   This can be used in conjunction with \ref findEnd to iterate over data points within a given key
   range, including or excluding the bounding data points that are just beyond the specified range.
 
   If \a expandedRange is true but there are no data points below \a sortKey, 0 is returned.
 
   If the container is empty, returns 0 (in that case, \ref findEnd will also return 0, so a loop
   using these methods will not iterate over the index 0).
 
   \see findEnd, QCPDataContainer::findBegin
 */
 
 /*! \fn virtual int QCPPlottableInterface1D::findEnd(double sortKey, bool expandedRange) const = 0
 
   Returns the index one after the data point with a (sort-)key that is equal to, just above, or
   just below \a sortKey. If \a expandedRange is true, the data point just above \a sortKey will be
   considered, otherwise the one just below.
 
   This can be used in conjunction with \ref findBegin to iterate over data points within a given
   key range, including the bounding data points that are just below and above the specified range.
 
   If \a expandedRange is true but there are no data points above \a sortKey, the index just above the
   highest data point is returned.
 
   If the container is empty, returns 0.
 
   \see findBegin, QCPDataContainer::findEnd
 */
 
 /* end documentation of pure virtual functions */
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////// QCPAbstractPlottable1D
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /*! \class QCPAbstractPlottable1D
   \brief A template base class for plottables with one-dimensional data
 
   This template class derives from \ref QCPAbstractPlottable and from the abstract interface \ref
   QCPPlottableInterface1D. It serves as a base class for all one-dimensional data (i.e. data with
   one key dimension), such as \ref QCPGraph and QCPCurve.
 
   The template parameter \a DataType is the type of the data points of this plottable (e.g. \ref
   QCPGraphData or \ref QCPCurveData). The main purpose of this base class is to provide the member
   \a mDataContainer (a shared pointer to a \ref QCPDataContainer "QCPDataContainer<DataType>") and
   implement the according virtual methods of the \ref QCPPlottableInterface1D, such that most
   subclassed plottables don't need to worry about this anymore.
 
   Further, it provides a convenience method for retrieving selected/unselected data segments via
   \ref getDataSegments. This is useful when subclasses implement their \ref draw method and need to
   draw selected segments with a different pen/brush than unselected segments (also see \ref
   QCPSelectionDecorator).
 
   This class implements basic functionality of \ref QCPAbstractPlottable::selectTest and \ref
   QCPPlottableInterface1D::selectTestRect, assuming point-like data points, based on the 1D data
   interface. In spite of that, most plottable subclasses will want to reimplement those methods
   again, to provide a more accurate hit test based on their specific data visualization geometry.
 */
 
 /* start documentation of inline functions */
 
 /*! \fn QCPPlottableInterface1D *QCPAbstractPlottable1D::interface1D()
 
   Returns a \ref QCPPlottableInterface1D pointer to this plottable, providing access to its 1D
   interface.
 
   \seebaseclassmethod
 */
 
 /* end documentation of inline functions */
 
 /*!
   Forwards \a keyAxis and \a valueAxis to the \ref QCPAbstractPlottable::QCPAbstractPlottable
   "QCPAbstractPlottable" constructor and allocates the \a mDataContainer.
 */
 template <class DataType>
 QCPAbstractPlottable1D<DataType>::QCPAbstractPlottable1D(QCPAxis *keyAxis, QCPAxis *valueAxis)
     : QCPAbstractPlottable(keyAxis, valueAxis), mDataContainer(new QCPDataContainer<DataType>)
 {
 }
 
 template <class DataType>
 QCPAbstractPlottable1D<DataType>::~QCPAbstractPlottable1D()
 {
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::dataCount
 */
 template <class DataType>
 int QCPAbstractPlottable1D<DataType>::dataCount() const
 {
     return mDataContainer->size();
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::dataMainKey
 */
 template <class DataType>
 double QCPAbstractPlottable1D<DataType>::dataMainKey(int index) const
 {
     if (index >= 0 && index < mDataContainer->size())
     {
         return (mDataContainer->constBegin() + index)->mainKey();
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Index out of bounds" << index;
         return 0;
     }
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::dataSortKey
 */
 template <class DataType>
 double QCPAbstractPlottable1D<DataType>::dataSortKey(int index) const
 {
     if (index >= 0 && index < mDataContainer->size())
     {
         return (mDataContainer->constBegin() + index)->sortKey();
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Index out of bounds" << index;
         return 0;
     }
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::dataMainValue
 */
 template <class DataType>
 double QCPAbstractPlottable1D<DataType>::dataMainValue(int index) const
 {
     if (index >= 0 && index < mDataContainer->size())
     {
         return (mDataContainer->constBegin() + index)->mainValue();
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Index out of bounds" << index;
         return 0;
     }
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::dataValueRange
 */
 template <class DataType>
 QCPRange QCPAbstractPlottable1D<DataType>::dataValueRange(int index) const
 {
     if (index >= 0 && index < mDataContainer->size())
     {
         return (mDataContainer->constBegin() + index)->valueRange();
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Index out of bounds" << index;
         return QCPRange(0, 0);
     }
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::dataPixelPosition
 */
 template <class DataType>
 QPointF QCPAbstractPlottable1D<DataType>::dataPixelPosition(int index) const
 {
     if (index >= 0 && index < mDataContainer->size())
     {
         const typename QCPDataContainer<DataType>::const_iterator it = mDataContainer->constBegin() + index;
         return coordsToPixels(it->mainKey(), it->mainValue());
     }
     else
     {
         qDebug() << Q_FUNC_INFO << "Index out of bounds" << index;
         return QPointF();
     }
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::sortKeyIsMainKey
 */
 template <class DataType>
 bool QCPAbstractPlottable1D<DataType>::sortKeyIsMainKey() const
 {
     return DataType::sortKeyIsMainKey();
 }
 
 /*!
   Implements a rect-selection algorithm assuming the data (accessed via the 1D data interface) is
   point-like. Most subclasses will want to reimplement this method again, to provide a more
   accurate hit test based on the true data visualization geometry.
 
   \seebaseclassmethod
 */
 template <class DataType>
 QCPDataSelection QCPAbstractPlottable1D<DataType>::selectTestRect(const QRectF &rect, bool onlySelectable) const
 {
     QCPDataSelection result;
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return result;
     if (!mKeyAxis || !mValueAxis)
         return result;
 
     // convert rect given in pixels to ranges given in plot coordinates:
     double key1, value1, key2, value2;
     pixelsToCoords(rect.topLeft(), key1, value1);
     pixelsToCoords(rect.bottomRight(), key2, value2);
     QCPRange keyRange(key1, key2); // QCPRange normalizes internally so we don't have to care about whether key1 < key2
     QCPRange valueRange(value1, value2);
     typename QCPDataContainer<DataType>::const_iterator begin = mDataContainer->constBegin();
     typename QCPDataContainer<DataType>::const_iterator end   = mDataContainer->constEnd();
     if (DataType::
             sortKeyIsMainKey()) // we can assume that data is sorted by main key, so can reduce the searched key interval:
     {
         begin = mDataContainer->findBegin(keyRange.lower, false);
         end   = mDataContainer->findEnd(keyRange.upper, false);
     }
     if (begin == end)
         return result;
 
     int currentSegmentBegin = -1; // -1 means we're currently not in a segment that's contained in rect
     for (typename QCPDataContainer<DataType>::const_iterator it = begin; it != end; ++it)
     {
         if (currentSegmentBegin == -1)
         {
             if (valueRange.contains(it->mainValue()) && keyRange.contains(it->mainKey())) // start segment
                 currentSegmentBegin = it - mDataContainer->constBegin();
         }
         else if (!valueRange.contains(it->mainValue()) || !keyRange.contains(it->mainKey())) // segment just ended
         {
             result.addDataRange(QCPDataRange(currentSegmentBegin, it - mDataContainer->constBegin()), false);
             currentSegmentBegin = -1;
         }
     }
     // process potential last segment:
     if (currentSegmentBegin != -1)
         result.addDataRange(QCPDataRange(currentSegmentBegin, end - mDataContainer->constBegin()), false);
 
     result.simplify();
     return result;
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::findBegin
 */
 template <class DataType>
 int QCPAbstractPlottable1D<DataType>::findBegin(double sortKey, bool expandedRange) const
 {
     return mDataContainer->findBegin(sortKey, expandedRange) - mDataContainer->constBegin();
 }
 
 /*!
   \copydoc QCPPlottableInterface1D::findEnd
 */
 template <class DataType>
 int QCPAbstractPlottable1D<DataType>::findEnd(double sortKey, bool expandedRange) const
 {
     return mDataContainer->findEnd(sortKey, expandedRange) - mDataContainer->constBegin();
 }
 
 /*!
   Implements a point-selection algorithm assuming the data (accessed via the 1D data interface) is
   point-like. Most subclasses will want to reimplement this method again, to provide a more
   accurate hit test based on the true data visualization geometry.
 
   \seebaseclassmethod
 */
 template <class DataType>
 double QCPAbstractPlottable1D<DataType>::selectTest(const QPointF &pos, bool onlySelectable, QVariant *details) const
 {
     if ((onlySelectable && mSelectable == QCP::stNone) || mDataContainer->isEmpty())
         return -1;
     if (!mKeyAxis || !mValueAxis)
         return -1;
 
     QCPDataSelection selectionResult;
     double minDistSqr = std::numeric_limits<double>::max();
     int minDistIndex  = mDataContainer->size();
 
     typename QCPDataContainer<DataType>::const_iterator begin = mDataContainer->constBegin();
     typename QCPDataContainer<DataType>::const_iterator end   = mDataContainer->constEnd();
     if (DataType::
             sortKeyIsMainKey()) // we can assume that data is sorted by main key, so can reduce the searched key interval:
     {
         // determine which key range comes into question, taking selection tolerance around pos into account:
         double posKeyMin, posKeyMax, dummy;
         pixelsToCoords(pos - QPointF(mParentPlot->selectionTolerance(), mParentPlot->selectionTolerance()), posKeyMin,
                        dummy);
         pixelsToCoords(pos + QPointF(mParentPlot->selectionTolerance(), mParentPlot->selectionTolerance()), posKeyMax,
                        dummy);
         if (posKeyMin > posKeyMax)
             qSwap(posKeyMin, posKeyMax);
         begin = mDataContainer->findBegin(posKeyMin, true);
         end   = mDataContainer->findEnd(posKeyMax, true);
     }
     if (begin == end)
         return -1;
     QCPRange keyRange(mKeyAxis->range());
     QCPRange valueRange(mValueAxis->range());
     for (typename QCPDataContainer<DataType>::const_iterator it = begin; it != end; ++it)
     {
         const double mainKey   = it->mainKey();
         const double mainValue = it->mainValue();
         if (keyRange.contains(mainKey) &&
             valueRange.contains(
                 mainValue)) // make sure data point is inside visible range, for speedup in cases where sort key isn't main key and we iterate over all points
         {
             const double currentDistSqr = QCPVector2D(coordsToPixels(mainKey, mainValue) - pos).lengthSquared();
             if (currentDistSqr < minDistSqr)
             {
                 minDistSqr   = currentDistSqr;
                 minDistIndex = it - mDataContainer->constBegin();
             }
         }
     }
     if (minDistIndex != mDataContainer->size())
         selectionResult.addDataRange(QCPDataRange(minDistIndex, minDistIndex + 1), false);
 
     selectionResult.simplify();
     if (details)
         details->setValue(selectionResult);
     return qSqrt(minDistSqr);
 }
 
 /*!
   Splits all data into selected and unselected segments and outputs them via \a selectedSegments
   and \a unselectedSegments, respectively.
 
   This is useful when subclasses implement their \ref draw method and need to draw selected
   segments with a different pen/brush than unselected segments (also see \ref
   QCPSelectionDecorator).
 
   \see setSelection
 */
 template <class DataType>
 void QCPAbstractPlottable1D<DataType>::getDataSegments(QList<QCPDataRange> &selectedSegments,
                                                        QList<QCPDataRange> &unselectedSegments) const
 {
     selectedSegments.clear();
     unselectedSegments.clear();
     if (mSelectable ==
         QCP::stWhole) // stWhole selection type draws the entire plottable with selected style if mSelection isn't empty
     {
         if (selected())
             selectedSegments << QCPDataRange(0, dataCount());
         else
             unselectedSegments << QCPDataRange(0, dataCount());
     }
     else
     {
         QCPDataSelection sel(selection());
         sel.simplify();
         selectedSegments   = sel.dataRanges();
         unselectedSegments = sel.inverse(QCPDataRange(0, dataCount())).dataRanges();
     }
 }
 
 /*!
   A helper method which draws a line with the passed \a painter, according to the pixel data in \a
   lineData. NaN points create gaps in the line, as expected from QCustomPlot's plottables (this is
   the main difference to QPainter's regular drawPolyline, which handles NaNs by lagging or
   crashing).
 
   Further it uses a faster line drawing technique based on \ref QCPPainter::drawLine rather than \c
   QPainter::drawPolyline if the configured \ref QCustomPlot::setPlottingHints() and \a painter
   style allows.
 */
 template <class DataType>
 void QCPAbstractPlottable1D<DataType>::drawPolyline(QCPPainter *painter, const QVector<QPointF> &lineData) const
 {
     // if drawing solid line and not in PDF, use much faster line drawing instead of polyline:
     if (mParentPlot->plottingHints().testFlag(QCP::phFastPolylines) && painter->pen().style() == Qt::SolidLine &&
         !painter->modes().testFlag(QCPPainter::pmVectorized) && !painter->modes().testFlag(QCPPainter::pmNoCaching))
     {
         int i                  = 0;
         bool lastIsNan         = false;
         const int lineDataSize = lineData.size();
         while (i < lineDataSize &&
                (qIsNaN(lineData.at(i).y()) || qIsNaN(lineData.at(i).x()))) // make sure first point is not NaN
             ++i;
         ++i; // because drawing works in 1 point retrospect
         while (i < lineDataSize)
         {
             if (!qIsNaN(lineData.at(i).y()) && !qIsNaN(lineData.at(i).x())) // NaNs create a gap in the line
             {
                 if (!lastIsNan)
                     painter->drawLine(lineData.at(i - 1), lineData.at(i));
                 else
                     lastIsNan = false;
             }
             else
                 lastIsNan = true;
             ++i;
         }
     }
     else
     {
         int segmentStart       = 0;
         int i                  = 0;
         const int lineDataSize = lineData.size();
         while (i < lineDataSize)
         {
             if (qIsNaN(lineData.at(i).y()) || qIsNaN(lineData.at(i).x()) ||
                 qIsInf(lineData.at(i)
                            .y())) // NaNs create a gap in the line. Also filter Infs which make drawPolyline block
             {
                 painter->drawPolyline(lineData.constData() + segmentStart,
                                       i - segmentStart); // i, because we don't want to include the current NaN point
                 segmentStart = i + 1;
             }
             ++i;
         }
         // draw last segment:
         painter->drawPolyline(lineData.constData() + segmentStart, lineDataSize - segmentStart);
     }
 }
 /* end of 'src/plottable1d.cpp' */
 
 /* end of 'src/plottable1d.h' */
 
 /* including file 'src/colorgradient.h', size 6243                           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPColorGradient
 {
     Q_GADGET
   public:
     /*!
           Defines the color spaces in which color interpolation between gradient stops can be performed.
 
           \see setColorInterpolation
         */
     enum ColorInterpolation
     {
         ciRGB ///< Color channels red, green and blue are linearly interpolated
         ,
         ciHSV ///< Color channels hue, saturation and value are linearly interpolated (The hue is interpolated over the shortest angle distance)
     };
     Q_ENUM(ColorInterpolation)
 
     /*!
           Defines the available presets that can be loaded with \ref loadPreset. See the documentation
           there for an image of the presets.
         */
     enum GradientPreset
     {
         gpGrayscale ///< Continuous lightness from black to white (suited for non-biased data representation)
         ,
         gpHot ///< Continuous lightness from black over firey colors to white (suited for non-biased data representation)
         ,
         gpCold ///< Continuous lightness from black over icey colors to white (suited for non-biased data representation)
         ,
         gpNight ///< Continuous lightness from black over weak blueish colors to white (suited for non-biased data representation)
         ,
         gpCandy ///< Blue over pink to white
         ,
         gpGeography ///< Colors suitable to represent different elevations on geographical maps
         ,
         gpIon ///< Half hue spectrum from black over purple to blue and finally green (creates banding illusion but allows more precise magnitude estimates)
         ,
         gpThermal ///< Colors suitable for thermal imaging, ranging from dark blue over purple to orange, yellow and white
         ,
         gpPolar ///< Colors suitable to emphasize polarity around the center, with blue for negative, black in the middle and red for positive values
         ,
         gpSpectrum ///< An approximation of the visible light spectrum (creates banding illusion but allows more precise magnitude estimates)
         ,
         gpJet ///< Hue variation similar to a spectrum, often used in numerical visualization (creates banding illusion but allows more precise magnitude estimates)
         ,
         gpHues ///< Full hue cycle, with highest and lowest color red (suitable for periodic data, such as angles and phases, see \ref setPeriodic)
     };
     Q_ENUM(GradientPreset)
 
     QCPColorGradient();
     QCPColorGradient(GradientPreset preset);
     bool operator==(const QCPColorGradient &other) const;
     bool operator!=(const QCPColorGradient &other) const { return !(*this == other); }
 
     // getters:
     int levelCount() const { return mLevelCount; }
     QMap<double, QColor> colorStops() const { return mColorStops; }
     ColorInterpolation colorInterpolation() const { return mColorInterpolation; }
     bool periodic() const { return mPeriodic; }
 
     // setters:
     void setLevelCount(int n);
     void setColorStops(const QMap<double, QColor> &colorStops);
     void setColorStopAt(double position, const QColor &color);
     void setColorInterpolation(ColorInterpolation interpolation);
     void setPeriodic(bool enabled);
 
     // non-property methods:
     void colorize(const double *data, const QCPRange &range, QRgb *scanLine, int n, int dataIndexFactor = 1,
                   bool logarithmic = false);
     void colorize(const double *data, const unsigned char *alpha, const QCPRange &range, QRgb *scanLine, int n,
                   int dataIndexFactor = 1, bool logarithmic = false);
     QRgb color(double position, const QCPRange &range, bool logarithmic = false);
     void loadPreset(GradientPreset preset);
     void clearColorStops();
     QCPColorGradient inverted() const;
 
   protected:
     // property members:
     int mLevelCount;
     QMap<double, QColor> mColorStops;
     ColorInterpolation mColorInterpolation;
     bool mPeriodic;
 
     // non-property members:
     QVector<QRgb>
         mColorBuffer; // have colors premultiplied with alpha (for usage with QImage::Format_ARGB32_Premultiplied)
     bool mColorBufferInvalidated;
 
     // non-virtual methods:
     bool stopsUseAlpha() const;
     void updateColorBuffer();
 };
 Q_DECLARE_METATYPE(QCPColorGradient::ColorInterpolation)
 Q_DECLARE_METATYPE(QCPColorGradient::GradientPreset)
 
 /* end of 'src/colorgradient.h' */
 
 /* including file 'src/selectiondecorator-bracket.h', size 4426              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPSelectionDecoratorBracket : public QCPSelectionDecorator
 {
     Q_GADGET
   public:
     /*!
           Defines which shape is drawn at the boundaries of selected data ranges.
 
           Some of the bracket styles further allow specifying a height and/or width, see \ref
           setBracketHeight and \ref setBracketWidth.
         */
     enum BracketStyle
     {
         bsSquareBracket ///< A square bracket is drawn.
         ,
         bsHalfEllipse ///< A half ellipse is drawn. The size of the ellipse is given by the bracket width/height properties.
         ,
         bsEllipse ///< An ellipse is drawn. The size of the ellipse is given by the bracket width/height properties.
         ,
         bsPlus ///< A plus is drawn.
         ,
         bsUserStyle ///< Start custom bracket styles at this index when subclassing and reimplementing \ref drawBracket.
     };
     Q_ENUM(BracketStyle)
 
     QCPSelectionDecoratorBracket();
     ~QCPSelectionDecoratorBracket() override;
 
     // getters:
     QPen bracketPen() const { return mBracketPen; }
     QBrush bracketBrush() const { return mBracketBrush; }
     int bracketWidth() const { return mBracketWidth; }
     int bracketHeight() const { return mBracketHeight; }
     BracketStyle bracketStyle() const { return mBracketStyle; }
     bool tangentToData() const { return mTangentToData; }
     int tangentAverage() const { return mTangentAverage; }
 
     // setters:
     void setBracketPen(const QPen &pen);
     void setBracketBrush(const QBrush &brush);
     void setBracketWidth(int width);
     void setBracketHeight(int height);
     void setBracketStyle(BracketStyle style);
     void setTangentToData(bool enabled);
     void setTangentAverage(int pointCount);
 
     // introduced virtual methods:
     virtual void drawBracket(QCPPainter *painter, int direction) const;
 
     // virtual methods:
     void drawDecoration(QCPPainter *painter, QCPDataSelection selection) override;
 
   protected:
     // property members:
     QPen mBracketPen;
     QBrush mBracketBrush;
     int mBracketWidth;
     int mBracketHeight;
     BracketStyle mBracketStyle;
     bool mTangentToData;
     int mTangentAverage;
 
     // non-virtual methods:
     double getTangentAngle(const QCPPlottableInterface1D *interface1d, int dataIndex, int direction) const;
     QPointF getPixelCoordinates(const QCPPlottableInterface1D *interface1d, int dataIndex) const;
 };
 Q_DECLARE_METATYPE(QCPSelectionDecoratorBracket::BracketStyle)
 
 /* end of 'src/selectiondecorator-bracket.h' */
 
 /* including file 'src/layoutelements/layoutelement-axisrect.h', size 7528   */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAxisRect : public QCPLayoutElement
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPixmap background READ background WRITE setBackground)
     Q_PROPERTY(bool backgroundScaled READ backgroundScaled WRITE setBackgroundScaled)
     Q_PROPERTY(Qt::AspectRatioMode backgroundScaledMode READ backgroundScaledMode WRITE setBackgroundScaledMode)
     Q_PROPERTY(Qt::Orientations rangeDrag READ rangeDrag WRITE setRangeDrag)
     Q_PROPERTY(Qt::Orientations rangeZoom READ rangeZoom WRITE setRangeZoom)
     /// \endcond
   public:
     explicit QCPAxisRect(QCustomPlot *parentPlot, bool setupDefaultAxes = true);
     ~QCPAxisRect() override;
 
     // getters:
     QPixmap background() const { return mBackgroundPixmap; }
     QBrush backgroundBrush() const { return mBackgroundBrush; }
     bool backgroundScaled() const { return mBackgroundScaled; }
     Qt::AspectRatioMode backgroundScaledMode() const { return mBackgroundScaledMode; }
     Qt::Orientations rangeDrag() const { return mRangeDrag; }
     Qt::Orientations rangeZoom() const { return mRangeZoom; }
     QCPAxis *rangeDragAxis(Qt::Orientation orientation);
     QCPAxis *rangeZoomAxis(Qt::Orientation orientation);
     QList<QCPAxis *> rangeDragAxes(Qt::Orientation orientation);
     QList<QCPAxis *> rangeZoomAxes(Qt::Orientation orientation);
     double rangeZoomFactor(Qt::Orientation orientation);
 
     // setters:
     void setBackground(const QPixmap &pm);
     void setBackground(const QPixmap &pm, bool scaled, Qt::AspectRatioMode mode = Qt::KeepAspectRatioByExpanding);
     void setBackground(const QBrush &brush);
     void setBackgroundScaled(bool scaled);
     void setBackgroundScaledMode(Qt::AspectRatioMode mode);
     void setRangeDrag(Qt::Orientations orientations);
     void setRangeZoom(Qt::Orientations orientations);
     void setRangeDragAxes(QCPAxis *horizontal, QCPAxis *vertical);
     void setRangeDragAxes(QList<QCPAxis *> axes);
     void setRangeDragAxes(QList<QCPAxis *> horizontal, QList<QCPAxis *> vertical);
     void setRangeZoomAxes(QCPAxis *horizontal, QCPAxis *vertical);
     void setRangeZoomAxes(QList<QCPAxis *> axes);
     void setRangeZoomAxes(QList<QCPAxis *> horizontal, QList<QCPAxis *> vertical);
     void setRangeZoomFactor(double horizontalFactor, double verticalFactor);
     void setRangeZoomFactor(double factor);
 
     // non-property methods:
     int axisCount(QCPAxis::AxisType type) const;
     QCPAxis *axis(QCPAxis::AxisType type, int index = 0) const;
     QList<QCPAxis *> axes(QCPAxis::AxisTypes types) const;
     QList<QCPAxis *> axes() const;
-    QCPAxis *addAxis(QCPAxis::AxisType type, QCPAxis *axis = 0);
+    QCPAxis *addAxis(QCPAxis::AxisType type, QCPAxis *axis = nullptr);
     QList<QCPAxis *> addAxes(QCPAxis::AxisTypes types);
     bool removeAxis(QCPAxis *axis);
     QCPLayoutInset *insetLayout() const { return mInsetLayout; }
 
     void zoom(const QRectF &pixelRect);
     void zoom(const QRectF &pixelRect, const QList<QCPAxis *> &affectedAxes);
     void setupFullAxesBox(bool connectRanges = false);
     QList<QCPAbstractPlottable *> plottables() const;
     QList<QCPGraph *> graphs() const;
     QList<QCPAbstractItem *> items() const;
 
     // read-only interface imitating a QRect:
     int left() const { return mRect.left(); }
     int right() const { return mRect.right(); }
     int top() const { return mRect.top(); }
     int bottom() const { return mRect.bottom(); }
     int width() const { return mRect.width(); }
     int height() const { return mRect.height(); }
     QSize size() const { return mRect.size(); }
     QPoint topLeft() const { return mRect.topLeft(); }
     QPoint topRight() const { return mRect.topRight(); }
     QPoint bottomLeft() const { return mRect.bottomLeft(); }
     QPoint bottomRight() const { return mRect.bottomRight(); }
     QPoint center() const { return mRect.center(); }
 
     // reimplemented virtual methods:
     void update(UpdatePhase phase) override;
     QList<QCPLayoutElement *> elements(bool recursive) const override;
 
   protected:
     // property members:
     QBrush mBackgroundBrush;
     QPixmap mBackgroundPixmap;
     QPixmap mScaledBackgroundPixmap;
     bool mBackgroundScaled;
     Qt::AspectRatioMode mBackgroundScaledMode;
     QCPLayoutInset *mInsetLayout;
     Qt::Orientations mRangeDrag, mRangeZoom;
     QList<QPointer<QCPAxis>> mRangeDragHorzAxis, mRangeDragVertAxis;
     QList<QPointer<QCPAxis>> mRangeZoomHorzAxis, mRangeZoomVertAxis;
     double mRangeZoomFactorHorz, mRangeZoomFactorVert;
 
     // non-property members:
     QList<QCPRange> mDragStartHorzRange, mDragStartVertRange;
     QCP::AntialiasedElements mAADragBackup, mNotAADragBackup;
     QPoint mDragStart;
     bool mDragging;
     QHash<QCPAxis::AxisType, QList<QCPAxis *>> mAxes;
 
     // reimplemented virtual methods:
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     void draw(QCPPainter *painter) override;
     int calculateAutoMargin(QCP::MarginSide side) override;
     void layoutChanged() override;
     // events:
     void mousePressEvent(QMouseEvent *event, const QVariant &details) override;
     void mouseMoveEvent(QMouseEvent *event, const QPointF &startPos) override;
     void mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos) override;
     void wheelEvent(QWheelEvent *event) override;
 
     // non-property methods:
     void drawBackground(QCPPainter *painter);
     void updateAxesOffset(QCPAxis::AxisType type);
 
   private:
     Q_DISABLE_COPY(QCPAxisRect)
 
     friend class QCustomPlot;
 };
 
 /* end of 'src/layoutelements/layoutelement-axisrect.h' */
 
 /* including file 'src/layoutelements/layoutelement-legend.h', size 10392    */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPAbstractLegendItem : public QCPLayoutElement
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QCPLegend *parentLegend READ parentLegend)
     Q_PROPERTY(QFont font READ font WRITE setFont)
     Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor)
     Q_PROPERTY(QFont selectedFont READ selectedFont WRITE setSelectedFont)
     Q_PROPERTY(QColor selectedTextColor READ selectedTextColor WRITE setSelectedTextColor)
     Q_PROPERTY(bool selectable READ selectable WRITE setSelectable NOTIFY selectionChanged)
     Q_PROPERTY(bool selected READ selected WRITE setSelected NOTIFY selectableChanged)
     /// \endcond
   public:
     explicit QCPAbstractLegendItem(QCPLegend *parent);
 
     // getters:
     QCPLegend *parentLegend() const { return mParentLegend; }
     QFont font() const { return mFont; }
     QColor textColor() const { return mTextColor; }
     QFont selectedFont() const { return mSelectedFont; }
     QColor selectedTextColor() const { return mSelectedTextColor; }
     bool selectable() const { return mSelectable; }
     bool selected() const { return mSelected; }
 
     // setters:
     void setFont(const QFont &font);
     void setTextColor(const QColor &color);
     void setSelectedFont(const QFont &font);
     void setSelectedTextColor(const QColor &color);
     Q_SLOT void setSelectable(bool selectable);
     Q_SLOT void setSelected(bool selected);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
   signals:
     void selectionChanged(bool selected);
     void selectableChanged(bool selectable);
 
   protected:
     // property members:
     QCPLegend *mParentLegend;
     QFont mFont;
     QColor mTextColor;
     QFont mSelectedFont;
     QColor mSelectedTextColor;
     bool mSelectable, mSelected;
 
     // reimplemented virtual methods:
     QCP::Interaction selectionCategory() const override;
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     QRect clipRect() const override;
     void draw(QCPPainter *painter) override = 0;
     // events:
     void selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                              bool *selectionStateChanged) override;
     void deselectEvent(bool *selectionStateChanged) override;
 
   private:
     Q_DISABLE_COPY(QCPAbstractLegendItem)
 
     friend class QCPLegend;
 };
 
 class QCP_LIB_DECL QCPPlottableLegendItem : public QCPAbstractLegendItem
 {
     Q_OBJECT
   public:
     QCPPlottableLegendItem(QCPLegend *parent, QCPAbstractPlottable *plottable);
 
     // getters:
     QCPAbstractPlottable *plottable() { return mPlottable; }
 
   protected:
     // property members:
     QCPAbstractPlottable *mPlottable;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     QSize minimumSizeHint() const override;
 
     // non-virtual methods:
     QPen getIconBorderPen() const;
     QColor getTextColor() const;
     QFont getFont() const;
 };
 
 class QCP_LIB_DECL QCPLegend : public QCPLayoutGrid
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen borderPen READ borderPen WRITE setBorderPen)
     Q_PROPERTY(QBrush brush READ brush WRITE setBrush)
     Q_PROPERTY(QFont font READ font WRITE setFont)
     Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor)
     Q_PROPERTY(QSize iconSize READ iconSize WRITE setIconSize)
     Q_PROPERTY(int iconTextPadding READ iconTextPadding WRITE setIconTextPadding)
     Q_PROPERTY(QPen iconBorderPen READ iconBorderPen WRITE setIconBorderPen)
     Q_PROPERTY(SelectableParts selectableParts READ selectableParts WRITE setSelectableParts NOTIFY selectionChanged)
     Q_PROPERTY(SelectableParts selectedParts READ selectedParts WRITE setSelectedParts NOTIFY selectableChanged)
     Q_PROPERTY(QPen selectedBorderPen READ selectedBorderPen WRITE setSelectedBorderPen)
     Q_PROPERTY(QPen selectedIconBorderPen READ selectedIconBorderPen WRITE setSelectedIconBorderPen)
     Q_PROPERTY(QBrush selectedBrush READ selectedBrush WRITE setSelectedBrush)
     Q_PROPERTY(QFont selectedFont READ selectedFont WRITE setSelectedFont)
     Q_PROPERTY(QColor selectedTextColor READ selectedTextColor WRITE setSelectedTextColor)
     /// \endcond
   public:
     /*!
           Defines the selectable parts of a legend
 
           \see setSelectedParts, setSelectableParts
         */
     enum SelectablePart
     {
         spNone = 0x000 ///< <tt>0x000</tt> None
         ,
         spLegendBox = 0x001 ///< <tt>0x001</tt> The legend box (frame)
         ,
         spItems = 0x002 ///< <tt>0x002</tt> Legend items individually (see \ref selectedItems)
     };
     Q_ENUM(SelectablePart)
     Q_FLAGS(SelectableParts)
     Q_DECLARE_FLAGS(SelectableParts, SelectablePart)
 
     explicit QCPLegend();
     ~QCPLegend() override;
 
     // getters:
     QPen borderPen() const { return mBorderPen; }
     QBrush brush() const { return mBrush; }
     QFont font() const { return mFont; }
     QColor textColor() const { return mTextColor; }
     QSize iconSize() const { return mIconSize; }
     int iconTextPadding() const { return mIconTextPadding; }
     QPen iconBorderPen() const { return mIconBorderPen; }
     SelectableParts selectableParts() const { return mSelectableParts; }
     SelectableParts selectedParts() const;
     QPen selectedBorderPen() const { return mSelectedBorderPen; }
     QPen selectedIconBorderPen() const { return mSelectedIconBorderPen; }
     QBrush selectedBrush() const { return mSelectedBrush; }
     QFont selectedFont() const { return mSelectedFont; }
     QColor selectedTextColor() const { return mSelectedTextColor; }
 
     // setters:
     void setBorderPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setFont(const QFont &font);
     void setTextColor(const QColor &color);
     void setIconSize(const QSize &size);
     void setIconSize(int width, int height);
     void setIconTextPadding(int padding);
     void setIconBorderPen(const QPen &pen);
     Q_SLOT void setSelectableParts(const SelectableParts &selectableParts);
     Q_SLOT void setSelectedParts(const SelectableParts &selectedParts);
     void setSelectedBorderPen(const QPen &pen);
     void setSelectedIconBorderPen(const QPen &pen);
     void setSelectedBrush(const QBrush &brush);
     void setSelectedFont(const QFont &font);
     void setSelectedTextColor(const QColor &color);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     // non-virtual methods:
     QCPAbstractLegendItem *item(int index) const;
     QCPPlottableLegendItem *itemWithPlottable(const QCPAbstractPlottable *plottable) const;
     int itemCount() const;
     bool hasItem(QCPAbstractLegendItem *item) const;
     bool hasItemWithPlottable(const QCPAbstractPlottable *plottable) const;
     bool addItem(QCPAbstractLegendItem *item);
     bool removeItem(int index);
     bool removeItem(QCPAbstractLegendItem *item);
     void clearItems();
     QList<QCPAbstractLegendItem *> selectedItems() const;
 
   signals:
     void selectionChanged(QCPLegend::SelectableParts parts);
     void selectableChanged(QCPLegend::SelectableParts parts);
 
   protected:
     // property members:
     QPen mBorderPen, mIconBorderPen;
     QBrush mBrush;
     QFont mFont;
     QColor mTextColor;
     QSize mIconSize;
     int mIconTextPadding;
     SelectableParts mSelectedParts, mSelectableParts;
     QPen mSelectedBorderPen, mSelectedIconBorderPen;
     QBrush mSelectedBrush;
     QFont mSelectedFont;
     QColor mSelectedTextColor;
 
     // reimplemented virtual methods:
     void parentPlotInitialized(QCustomPlot *parentPlot) override;
     QCP::Interaction selectionCategory() const override;
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     void draw(QCPPainter *painter) override;
     // events:
     void selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                              bool *selectionStateChanged) override;
     void deselectEvent(bool *selectionStateChanged) override;
 
     // non-virtual methods:
     QPen getBorderPen() const;
     QBrush getBrush() const;
 
   private:
     Q_DISABLE_COPY(QCPLegend)
 
     friend class QCustomPlot;
     friend class QCPAbstractLegendItem;
 };
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCPLegend::SelectableParts)
 Q_DECLARE_METATYPE(QCPLegend::SelectablePart)
 
 /* end of 'src/layoutelements/layoutelement-legend.h' */
 
 /* including file 'src/layoutelements/layoutelement-textelement.h', size 5343 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200  */
 
 class QCP_LIB_DECL QCPTextElement : public QCPLayoutElement
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QString text READ text WRITE setText)
     Q_PROPERTY(QFont font READ font WRITE setFont)
     Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor)
     Q_PROPERTY(QFont selectedFont READ selectedFont WRITE setSelectedFont)
     Q_PROPERTY(QColor selectedTextColor READ selectedTextColor WRITE setSelectedTextColor)
     Q_PROPERTY(bool selectable READ selectable WRITE setSelectable NOTIFY selectableChanged)
     Q_PROPERTY(bool selected READ selected WRITE setSelected NOTIFY selectionChanged)
     /// \endcond
   public:
     explicit QCPTextElement(QCustomPlot *parentPlot);
     QCPTextElement(QCustomPlot *parentPlot, const QString &text);
     QCPTextElement(QCustomPlot *parentPlot, const QString &text, double pointSize);
     QCPTextElement(QCustomPlot *parentPlot, const QString &text, const QString &fontFamily, double pointSize);
     QCPTextElement(QCustomPlot *parentPlot, const QString &text, const QFont &font);
 
     // getters:
     QString text() const { return mText; }
     int textFlags() const { return mTextFlags; }
     QFont font() const { return mFont; }
     QColor textColor() const { return mTextColor; }
     QFont selectedFont() const { return mSelectedFont; }
     QColor selectedTextColor() const { return mSelectedTextColor; }
     bool selectable() const { return mSelectable; }
     bool selected() const { return mSelected; }
 
     // setters:
     void setText(const QString &text);
     void setTextFlags(int flags);
     void setFont(const QFont &font);
     void setTextColor(const QColor &color);
     void setSelectedFont(const QFont &font);
     void setSelectedTextColor(const QColor &color);
     Q_SLOT void setSelectable(bool selectable);
     Q_SLOT void setSelected(bool selected);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     void mousePressEvent(QMouseEvent *event, const QVariant &details) override;
     void mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos) override;
     void mouseDoubleClickEvent(QMouseEvent *event, const QVariant &details) override;
 
   signals:
     void selectionChanged(bool selected);
     void selectableChanged(bool selectable);
     void clicked(QMouseEvent *event);
     void doubleClicked(QMouseEvent *event);
 
   protected:
     // property members:
     QString mText;
     int mTextFlags;
     QFont mFont;
     QColor mTextColor;
     QFont mSelectedFont;
     QColor mSelectedTextColor;
     QRect mTextBoundingRect;
     bool mSelectable, mSelected;
 
     // reimplemented virtual methods:
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     void draw(QCPPainter *painter) override;
     QSize minimumSizeHint() const override;
     QSize maximumSizeHint() const override;
     // events:
     void selectEvent(QMouseEvent *event, bool additive, const QVariant &details,
                              bool *selectionStateChanged) override;
     void deselectEvent(bool *selectionStateChanged) override;
 
     // non-virtual methods:
     QFont mainFont() const;
     QColor mainTextColor() const;
 
   private:
     Q_DISABLE_COPY(QCPTextElement)
 };
 
 /* end of 'src/layoutelements/layoutelement-textelement.h' */
 
 /* including file 'src/layoutelements/layoutelement-colorscale.h', size 5907 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCPColorScaleAxisRectPrivate : public QCPAxisRect
 {
     Q_OBJECT
   public:
     explicit QCPColorScaleAxisRectPrivate(QCPColorScale *parentColorScale);
 
   protected:
     QCPColorScale *mParentColorScale;
     QImage mGradientImage;
     bool mGradientImageInvalidated;
     // re-using some methods of QCPAxisRect to make them available to friend class QCPColorScale
     using QCPAxisRect::calculateAutoMargin;
     using QCPAxisRect::mousePressEvent;
     using QCPAxisRect::mouseMoveEvent;
     using QCPAxisRect::mouseReleaseEvent;
     using QCPAxisRect::wheelEvent;
     using QCPAxisRect::update;
     void draw(QCPPainter *painter) override;
     void updateGradientImage();
     Q_SLOT void axisSelectionChanged(QCPAxis::SelectableParts selectedParts);
     Q_SLOT void axisSelectableChanged(QCPAxis::SelectableParts selectableParts);
     friend class QCPColorScale;
 };
 
 class QCP_LIB_DECL QCPColorScale : public QCPLayoutElement
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QCPAxis::AxisType type READ type WRITE setType)
     Q_PROPERTY(QCPRange dataRange READ dataRange WRITE setDataRange NOTIFY dataRangeChanged)
     Q_PROPERTY(QCPAxis::ScaleType dataScaleType READ dataScaleType WRITE setDataScaleType NOTIFY dataScaleTypeChanged)
     Q_PROPERTY(QCPColorGradient gradient READ gradient WRITE setGradient NOTIFY gradientChanged)
     Q_PROPERTY(QString label READ label WRITE setLabel)
     Q_PROPERTY(int barWidth READ barWidth WRITE setBarWidth)
     Q_PROPERTY(bool rangeDrag READ rangeDrag WRITE setRangeDrag)
     Q_PROPERTY(bool rangeZoom READ rangeZoom WRITE setRangeZoom)
     /// \endcond
   public:
     explicit QCPColorScale(QCustomPlot *parentPlot);
     ~QCPColorScale() override;
 
     // getters:
     QCPAxis *axis() const { return mColorAxis.data(); }
     QCPAxis::AxisType type() const { return mType; }
     QCPRange dataRange() const { return mDataRange; }
     QCPAxis::ScaleType dataScaleType() const { return mDataScaleType; }
     QCPColorGradient gradient() const { return mGradient; }
     QString label() const;
     int barWidth() const { return mBarWidth; }
     bool rangeDrag() const;
     bool rangeZoom() const;
 
     // setters:
     void setType(QCPAxis::AxisType type);
     Q_SLOT void setDataRange(const QCPRange &dataRange);
     Q_SLOT void setDataScaleType(QCPAxis::ScaleType scaleType);
     Q_SLOT void setGradient(const QCPColorGradient &gradient);
     void setLabel(const QString &str);
     void setBarWidth(int width);
     void setRangeDrag(bool enabled);
     void setRangeZoom(bool enabled);
 
     // non-property methods:
     QList<QCPColorMap *> colorMaps() const;
     void rescaleDataRange(bool onlyVisibleMaps);
 
     // reimplemented virtual methods:
     void update(UpdatePhase phase) override;
 
   signals:
     void dataRangeChanged(const QCPRange &newRange);
     void dataScaleTypeChanged(QCPAxis::ScaleType scaleType);
     void gradientChanged(const QCPColorGradient &newGradient);
 
   protected:
     // property members:
     QCPAxis::AxisType mType;
     QCPRange mDataRange;
     QCPAxis::ScaleType mDataScaleType;
     QCPColorGradient mGradient;
     int mBarWidth;
 
     // non-property members:
     QPointer<QCPColorScaleAxisRectPrivate> mAxisRect;
     QPointer<QCPAxis> mColorAxis;
 
     // reimplemented virtual methods:
     void applyDefaultAntialiasingHint(QCPPainter *painter) const override;
     // events:
     void mousePressEvent(QMouseEvent *event, const QVariant &details) override;
     void mouseMoveEvent(QMouseEvent *event, const QPointF &startPos) override;
     void mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos) override;
     void wheelEvent(QWheelEvent *event) override;
 
   private:
     Q_DISABLE_COPY(QCPColorScale)
 
     friend class QCPColorScaleAxisRectPrivate;
 };
 
 /* end of 'src/layoutelements/layoutelement-colorscale.h' */
 
 /* including file 'src/plottables/plottable-graph.h', size 8826              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPGraphData
 {
   public:
     QCPGraphData();
     QCPGraphData(double key, double value);
 
     inline double sortKey() const { return key; }
     inline static QCPGraphData fromSortKey(double sortKey) { return QCPGraphData(sortKey, 0); }
     inline static bool sortKeyIsMainKey() { return true; }
 
     inline double mainKey() const { return key; }
     inline double mainValue() const { return value; }
 
     inline QCPRange valueRange() const { return QCPRange(value, value); }
 
     double key, value;
 };
 Q_DECLARE_TYPEINFO(QCPGraphData, Q_PRIMITIVE_TYPE);
 
 /*! \typedef QCPGraphDataContainer
 
   Container for storing \ref QCPGraphData points. The data is stored sorted by \a key.
 
   This template instantiation is the container in which QCPGraph holds its data. For details about
   the generic container, see the documentation of the class template \ref QCPDataContainer.
 
   \see QCPGraphData, QCPGraph::setData
 */
 typedef QCPDataContainer<QCPGraphData> QCPGraphDataContainer;
 
 class QCP_LIB_DECL QCPGraph : public QCPAbstractPlottable1D<QCPGraphData>
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(LineStyle lineStyle READ lineStyle WRITE setLineStyle)
     Q_PROPERTY(QCPScatterStyle scatterStyle READ scatterStyle WRITE setScatterStyle)
     Q_PROPERTY(int scatterSkip READ scatterSkip WRITE setScatterSkip)
     Q_PROPERTY(QCPGraph *channelFillGraph READ channelFillGraph WRITE setChannelFillGraph)
     Q_PROPERTY(bool adaptiveSampling READ adaptiveSampling WRITE setAdaptiveSampling)
     /// \endcond
   public:
     /*!
           Defines how the graph's line is represented visually in the plot. The line is drawn with the
           current pen of the graph (\ref setPen).
           \see setLineStyle
         */
     enum LineStyle
     {
         lsNone ///< data points are not connected with any lines (e.g. data only represented
                ///< with symbols according to the scatter style, see \ref setScatterStyle)
         ,
         lsLine ///< data points are connected by a straight line
         ,
         lsStepLeft ///< line is drawn as steps where the step height is the value of the left data point
         ,
         lsStepRight ///< line is drawn as steps where the step height is the value of the right data point
         ,
         lsStepCenter ///< line is drawn as steps where the step is in between two data points
         ,
         lsImpulse ///< each data point is represented by a line parallel to the value axis, which reaches from the data point to the zero-value-line
     };
     Q_ENUM(LineStyle)
 
     explicit QCPGraph(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPGraph() override;
 
     // getters:
     QSharedPointer<QCPGraphDataContainer> data() const { return mDataContainer; }
     LineStyle lineStyle() const { return mLineStyle; }
     QCPScatterStyle scatterStyle() const { return mScatterStyle; }
     int scatterSkip() const { return mScatterSkip; }
     QCPGraph *channelFillGraph() const { return mChannelFillGraph.data(); }
     bool adaptiveSampling() const { return mAdaptiveSampling; }
 
     // setters:
     void setData(QSharedPointer<QCPGraphDataContainer> data);
     void setData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted = false);
     void setLineStyle(LineStyle ls);
     void setScatterStyle(const QCPScatterStyle &style);
     void setScatterSkip(int skip);
     void setChannelFillGraph(QCPGraph *targetGraph);
     void setAdaptiveSampling(bool enabled);
 
     // non-property methods:
     void addData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted = false);
     void addData(double key, double value);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const override;
     QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const override;
 
   protected:
     // property members:
     LineStyle mLineStyle;
     QCPScatterStyle mScatterStyle;
     int mScatterSkip;
     QPointer<QCPGraph> mChannelFillGraph;
     bool mAdaptiveSampling;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const override;
 
     // introduced virtual methods:
     virtual void drawFill(QCPPainter *painter, QVector<QPointF> *lines) const;
     virtual void drawScatterPlot(QCPPainter *painter, const QVector<QPointF> &scatters,
                                  const QCPScatterStyle &style) const;
     virtual void drawLinePlot(QCPPainter *painter, const QVector<QPointF> &lines) const;
     virtual void drawImpulsePlot(QCPPainter *painter, const QVector<QPointF> &lines) const;
 
     virtual void getOptimizedLineData(QVector<QCPGraphData> *lineData,
                                       const QCPGraphDataContainer::const_iterator &begin,
                                       const QCPGraphDataContainer::const_iterator &end) const;
     virtual void getOptimizedScatterData(QVector<QCPGraphData> *scatterData,
                                          QCPGraphDataContainer::const_iterator begin,
                                          QCPGraphDataContainer::const_iterator end) const;
 
     // non-virtual methods:
     void getVisibleDataBounds(QCPGraphDataContainer::const_iterator &begin, QCPGraphDataContainer::const_iterator &end,
                               const QCPDataRange &rangeRestriction) const;
     void getLines(QVector<QPointF> *lines, const QCPDataRange &dataRange) const;
     void getScatters(QVector<QPointF> *scatters, const QCPDataRange &dataRange) const;
     QVector<QPointF> dataToLines(const QVector<QCPGraphData> &data) const;
     QVector<QPointF> dataToStepLeftLines(const QVector<QCPGraphData> &data) const;
     QVector<QPointF> dataToStepRightLines(const QVector<QCPGraphData> &data) const;
     QVector<QPointF> dataToStepCenterLines(const QVector<QCPGraphData> &data) const;
     QVector<QPointF> dataToImpulseLines(const QVector<QCPGraphData> &data) const;
     void addFillBasePoints(QVector<QPointF> *lines) const;
     void removeFillBasePoints(QVector<QPointF> *lines) const;
     QPointF lowerFillBasePoint(double lowerKey) const;
     QPointF upperFillBasePoint(double upperKey) const;
     const QPolygonF getChannelFillPolygon(const QVector<QPointF> *lines) const;
     int findIndexBelowX(const QVector<QPointF> *data, double x) const;
     int findIndexAboveX(const QVector<QPointF> *data, double x) const;
     int findIndexBelowY(const QVector<QPointF> *data, double y) const;
     int findIndexAboveY(const QVector<QPointF> *data, double y) const;
     double pointDistance(const QPointF &pixelPoint, QCPGraphDataContainer::const_iterator &closestData) const;
 
     friend class QCustomPlot;
     friend class QCPLegend;
 };
 Q_DECLARE_METATYPE(QCPGraph::LineStyle)
 
 /* end of 'src/plottables/plottable-graph.h' */
 
 /* including file 'src/plottables/plottable-curve.h', size 7409              */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPCurveData
 {
   public:
     QCPCurveData();
     QCPCurveData(double t, double key, double value);
 
     inline double sortKey() const { return t; }
     inline static QCPCurveData fromSortKey(double sortKey) { return QCPCurveData(sortKey, 0, 0); }
     inline static bool sortKeyIsMainKey() { return false; }
 
     inline double mainKey() const { return key; }
     inline double mainValue() const { return value; }
 
     inline QCPRange valueRange() const { return QCPRange(value, value); }
 
     double t, key, value;
 };
 Q_DECLARE_TYPEINFO(QCPCurveData, Q_PRIMITIVE_TYPE);
 
 /*! \typedef QCPCurveDataContainer
 
   Container for storing \ref QCPCurveData points. The data is stored sorted by \a t, so the \a
   sortKey() (returning \a t) is different from \a mainKey() (returning \a key).
 
   This template instantiation is the container in which QCPCurve holds its data. For details about
   the generic container, see the documentation of the class template \ref QCPDataContainer.
 
   \see QCPCurveData, QCPCurve::setData
 */
 typedef QCPDataContainer<QCPCurveData> QCPCurveDataContainer;
 
 class QCP_LIB_DECL QCPCurve : public QCPAbstractPlottable1D<QCPCurveData>
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QCPScatterStyle scatterStyle READ scatterStyle WRITE setScatterStyle)
     Q_PROPERTY(int scatterSkip READ scatterSkip WRITE setScatterSkip)
     Q_PROPERTY(LineStyle lineStyle READ lineStyle WRITE setLineStyle)
     /// \endcond
   public:
     /*!
           Defines how the curve's line is represented visually in the plot. The line is drawn with the
           current pen of the curve (\ref setPen).
           \see setLineStyle
         */
     enum LineStyle
     {
         lsNone ///< No line is drawn between data points (e.g. only scatters)
         ,
         lsLine ///< Data points are connected with a straight line
     };
     Q_ENUM(LineStyle)
 
     explicit QCPCurve(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPCurve() override;
 
     // getters:
     QSharedPointer<QCPCurveDataContainer> data() const { return mDataContainer; }
     QCPScatterStyle scatterStyle() const { return mScatterStyle; }
     int scatterSkip() const { return mScatterSkip; }
     LineStyle lineStyle() const { return mLineStyle; }
 
     // setters:
     void setData(QSharedPointer<QCPCurveDataContainer> data);
     void setData(const QVector<double> &t, const QVector<double> &keys, const QVector<double> &values,
                  bool alreadySorted = false);
     void setData(const QVector<double> &keys, const QVector<double> &values);
     void setScatterStyle(const QCPScatterStyle &style);
     void setScatterSkip(int skip);
     void setLineStyle(LineStyle style);
 
     // non-property methods:
     void addData(const QVector<double> &t, const QVector<double> &keys, const QVector<double> &values,
                  bool alreadySorted = false);
     void addData(const QVector<double> &keys, const QVector<double> &values);
     void addData(double t, double key, double value);
     void addData(double key, double value);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const override;
     QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const override;
 
   protected:
     // property members:
     QCPScatterStyle mScatterStyle;
     int mScatterSkip;
     LineStyle mLineStyle;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const override;
 
     // introduced virtual methods:
     virtual void drawCurveLine(QCPPainter *painter, const QVector<QPointF> &lines) const;
     virtual void drawScatterPlot(QCPPainter *painter, const QVector<QPointF> &points,
                                  const QCPScatterStyle &style) const;
 
     // non-virtual methods:
     void getCurveLines(QVector<QPointF> *lines, const QCPDataRange &dataRange, double penWidth) const;
     void getScatters(QVector<QPointF> *scatters, const QCPDataRange &dataRange, double scatterWidth) const;
     int getRegion(double key, double value, double keyMin, double valueMax, double keyMax, double valueMin) const;
     QPointF getOptimizedPoint(int prevRegion, double prevKey, double prevValue, double key, double value, double keyMin,
                               double valueMax, double keyMax, double valueMin) const;
     QVector<QPointF> getOptimizedCornerPoints(int prevRegion, int currentRegion, double prevKey, double prevValue,
                                               double key, double value, double keyMin, double valueMax, double keyMax,
                                               double valueMin) const;
     bool mayTraverse(int prevRegion, int currentRegion) const;
     bool getTraverse(double prevKey, double prevValue, double key, double value, double keyMin, double valueMax,
                      double keyMax, double valueMin, QPointF &crossA, QPointF &crossB) const;
     void getTraverseCornerPoints(int prevRegion, int currentRegion, double keyMin, double valueMax, double keyMax,
                                  double valueMin, QVector<QPointF> &beforeTraverse,
                                  QVector<QPointF> &afterTraverse) const;
     double pointDistance(const QPointF &pixelPoint, QCPCurveDataContainer::const_iterator &closestData) const;
 
     friend class QCustomPlot;
     friend class QCPLegend;
 };
 Q_DECLARE_METATYPE(QCPCurve::LineStyle)
 
 /* end of 'src/plottables/plottable-curve.h' */
 
 /* including file 'src/plottables/plottable-bars.h', size 8924               */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPBarsGroup : public QObject
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(SpacingType spacingType READ spacingType WRITE setSpacingType)
     Q_PROPERTY(double spacing READ spacing WRITE setSpacing)
     /// \endcond
   public:
     /*!
           Defines the ways the spacing between bars in the group can be specified. Thus it defines what
           the number passed to \ref setSpacing actually means.
 
           \see setSpacingType, setSpacing
         */
     enum SpacingType
     {
         stAbsolute ///< Bar spacing is in absolute pixels
         ,
         stAxisRectRatio ///< Bar spacing is given by a fraction of the axis rect size
         ,
         stPlotCoords ///< Bar spacing is in key coordinates and thus scales with the key axis range
     };
     Q_ENUM(SpacingType)
 
     QCPBarsGroup(QCustomPlot *parentPlot);
     ~QCPBarsGroup() override;
 
     // getters:
     SpacingType spacingType() const { return mSpacingType; }
     double spacing() const { return mSpacing; }
 
     // setters:
     void setSpacingType(SpacingType spacingType);
     void setSpacing(double spacing);
 
     // non-virtual methods:
     QList<QCPBars *> bars() const { return mBars; }
     QCPBars *bars(int index) const;
     int size() const { return mBars.size(); }
     bool isEmpty() const { return mBars.isEmpty(); }
     void clear();
     bool contains(QCPBars *bars) const { return mBars.contains(bars); }
     void append(QCPBars *bars);
     void insert(int i, QCPBars *bars);
     void remove(QCPBars *bars);
 
   protected:
     // non-property members:
     QCustomPlot *mParentPlot;
     SpacingType mSpacingType;
     double mSpacing;
     QList<QCPBars *> mBars;
 
     // non-virtual methods:
     void registerBars(QCPBars *bars);
     void unregisterBars(QCPBars *bars);
 
     // virtual methods:
     double keyPixelOffset(const QCPBars *bars, double keyCoord);
     double getPixelSpacing(const QCPBars *bars, double keyCoord);
 
   private:
     Q_DISABLE_COPY(QCPBarsGroup)
 
     friend class QCPBars;
 };
 Q_DECLARE_METATYPE(QCPBarsGroup::SpacingType)
 
 class QCP_LIB_DECL QCPBarsData
 {
   public:
     QCPBarsData();
     QCPBarsData(double key, double value);
 
     inline double sortKey() const { return key; }
     inline static QCPBarsData fromSortKey(double sortKey) { return QCPBarsData(sortKey, 0); }
     inline static bool sortKeyIsMainKey() { return true; }
 
     inline double mainKey() const { return key; }
     inline double mainValue() const { return value; }
 
     inline QCPRange valueRange() const
     {
         return QCPRange(
             value,
             value); // note that bar base value isn't held in each QCPBarsData and thus can't/shouldn't be returned here
     }
 
     double key, value;
 };
 Q_DECLARE_TYPEINFO(QCPBarsData, Q_PRIMITIVE_TYPE);
 
 /*! \typedef QCPBarsDataContainer
 
   Container for storing \ref QCPBarsData points. The data is stored sorted by \a key.
 
   This template instantiation is the container in which QCPBars holds its data. For details about
   the generic container, see the documentation of the class template \ref QCPDataContainer.
 
   \see QCPBarsData, QCPBars::setData
 */
 typedef QCPDataContainer<QCPBarsData> QCPBarsDataContainer;
 
 class QCP_LIB_DECL QCPBars : public QCPAbstractPlottable1D<QCPBarsData>
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(double width READ width WRITE setWidth)
     Q_PROPERTY(WidthType widthType READ widthType WRITE setWidthType)
     Q_PROPERTY(QCPBarsGroup *barsGroup READ barsGroup WRITE setBarsGroup)
     Q_PROPERTY(double baseValue READ baseValue WRITE setBaseValue)
     Q_PROPERTY(double stackingGap READ stackingGap WRITE setStackingGap)
     Q_PROPERTY(QCPBars *barBelow READ barBelow)
     Q_PROPERTY(QCPBars *barAbove READ barAbove)
     /// \endcond
   public:
     /*!
           Defines the ways the width of the bar can be specified. Thus it defines what the number passed
           to \ref setWidth actually means.
 
           \see setWidthType, setWidth
         */
     enum WidthType
     {
         wtAbsolute ///< Bar width is in absolute pixels
         ,
         wtAxisRectRatio ///< Bar width is given by a fraction of the axis rect size
         ,
         wtPlotCoords ///< Bar width is in key coordinates and thus scales with the key axis range
     };
     Q_ENUM(WidthType)
 
     explicit QCPBars(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPBars() override;
 
     // getters:
     double width() const { return mWidth; }
     WidthType widthType() const { return mWidthType; }
     QCPBarsGroup *barsGroup() const { return mBarsGroup; }
     double baseValue() const { return mBaseValue; }
     double stackingGap() const { return mStackingGap; }
     QCPBars *barBelow() const { return mBarBelow.data(); }
     QCPBars *barAbove() const { return mBarAbove.data(); }
     QSharedPointer<QCPBarsDataContainer> data() const { return mDataContainer; }
 
     // setters:
     void setData(QSharedPointer<QCPBarsDataContainer> data);
     void setData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted = false);
     void setWidth(double width);
     void setWidthType(WidthType widthType);
     void setBarsGroup(QCPBarsGroup *barsGroup);
     void setBaseValue(double baseValue);
     void setStackingGap(double pixels);
 
     // non-property methods:
     void addData(const QVector<double> &keys, const QVector<double> &values, bool alreadySorted = false);
     void addData(double key, double value);
     void moveBelow(QCPBars *bars);
     void moveAbove(QCPBars *bars);
 
     // reimplemented virtual methods:
     QCPDataSelection selectTestRect(const QRectF &rect, bool onlySelectable) const override;
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const override;
     QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const override;
     QPointF dataPixelPosition(int index) const override;
 
   protected:
     // property members:
     double mWidth;
     WidthType mWidthType;
     QCPBarsGroup *mBarsGroup;
     double mBaseValue;
     double mStackingGap;
     QPointer<QCPBars> mBarBelow, mBarAbove;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const override;
 
     // non-virtual methods:
     void getVisibleDataBounds(QCPBarsDataContainer::const_iterator &begin,
                               QCPBarsDataContainer::const_iterator &end) const;
     QRectF getBarRect(double key, double value) const;
     void getPixelWidth(double key, double &lower, double &upper) const;
     double getStackedBaseValue(double key, bool positive) const;
     static void connectBars(QCPBars *lower, QCPBars *upper);
 
     friend class QCustomPlot;
     friend class QCPLegend;
     friend class QCPBarsGroup;
 };
 Q_DECLARE_METATYPE(QCPBars::WidthType)
 
 /* end of 'src/plottables/plottable-bars.h' */
 
 /* including file 'src/plottables/plottable-statisticalbox.h', size 7516     */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPStatisticalBoxData
 {
   public:
     QCPStatisticalBoxData();
     QCPStatisticalBoxData(double key, double minimum, double lowerQuartile, double median, double upperQuartile,
                           double maximum, const QVector<double> &outliers = QVector<double>());
 
     inline double sortKey() const { return key; }
     inline static QCPStatisticalBoxData fromSortKey(double sortKey)
     {
         return QCPStatisticalBoxData(sortKey, 0, 0, 0, 0, 0);
     }
     inline static bool sortKeyIsMainKey() { return true; }
 
     inline double mainKey() const { return key; }
     inline double mainValue() const { return median; }
 
     inline QCPRange valueRange() const
     {
         QCPRange result(minimum, maximum);
         for (QVector<double>::const_iterator it = outliers.constBegin(); it != outliers.constEnd(); ++it)
             result.expand(*it);
         return result;
     }
 
     double key, minimum, lowerQuartile, median, upperQuartile, maximum;
     QVector<double> outliers;
 };
 Q_DECLARE_TYPEINFO(QCPStatisticalBoxData, Q_MOVABLE_TYPE);
 
 /*! \typedef QCPStatisticalBoxDataContainer
 
   Container for storing \ref QCPStatisticalBoxData points. The data is stored sorted by \a key.
 
   This template instantiation is the container in which QCPStatisticalBox holds its data. For
   details about the generic container, see the documentation of the class template \ref
   QCPDataContainer.
 
   \see QCPStatisticalBoxData, QCPStatisticalBox::setData
 */
 typedef QCPDataContainer<QCPStatisticalBoxData> QCPStatisticalBoxDataContainer;
 
 class QCP_LIB_DECL QCPStatisticalBox : public QCPAbstractPlottable1D<QCPStatisticalBoxData>
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(double width READ width WRITE setWidth)
     Q_PROPERTY(double whiskerWidth READ whiskerWidth WRITE setWhiskerWidth)
     Q_PROPERTY(QPen whiskerPen READ whiskerPen WRITE setWhiskerPen)
     Q_PROPERTY(QPen whiskerBarPen READ whiskerBarPen WRITE setWhiskerBarPen)
     Q_PROPERTY(bool whiskerAntialiased READ whiskerAntialiased WRITE setWhiskerAntialiased)
     Q_PROPERTY(QPen medianPen READ medianPen WRITE setMedianPen)
     Q_PROPERTY(QCPScatterStyle outlierStyle READ outlierStyle WRITE setOutlierStyle)
     /// \endcond
   public:
     explicit QCPStatisticalBox(QCPAxis *keyAxis, QCPAxis *valueAxis);
 
     // getters:
     QSharedPointer<QCPStatisticalBoxDataContainer> data() const { return mDataContainer; }
     double width() const { return mWidth; }
     double whiskerWidth() const { return mWhiskerWidth; }
     QPen whiskerPen() const { return mWhiskerPen; }
     QPen whiskerBarPen() const { return mWhiskerBarPen; }
     bool whiskerAntialiased() const { return mWhiskerAntialiased; }
     QPen medianPen() const { return mMedianPen; }
     QCPScatterStyle outlierStyle() const { return mOutlierStyle; }
 
     // setters:
     void setData(QSharedPointer<QCPStatisticalBoxDataContainer> data);
     void setData(const QVector<double> &keys, const QVector<double> &minimum, const QVector<double> &lowerQuartile,
                  const QVector<double> &median, const QVector<double> &upperQuartile, const QVector<double> &maximum,
                  bool alreadySorted = false);
     void setWidth(double width);
     void setWhiskerWidth(double width);
     void setWhiskerPen(const QPen &pen);
     void setWhiskerBarPen(const QPen &pen);
     void setWhiskerAntialiased(bool enabled);
     void setMedianPen(const QPen &pen);
     void setOutlierStyle(const QCPScatterStyle &style);
 
     // non-property methods:
     void addData(const QVector<double> &keys, const QVector<double> &minimum, const QVector<double> &lowerQuartile,
                  const QVector<double> &median, const QVector<double> &upperQuartile, const QVector<double> &maximum,
                  bool alreadySorted = false);
     void addData(double key, double minimum, double lowerQuartile, double median, double upperQuartile, double maximum,
                  const QVector<double> &outliers = QVector<double>());
 
     // reimplemented virtual methods:
     QCPDataSelection selectTestRect(const QRectF &rect, bool onlySelectable) const override;
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const override;
     QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const override;
 
   protected:
     // property members:
     double mWidth;
     double mWhiskerWidth;
     QPen mWhiskerPen, mWhiskerBarPen;
     bool mWhiskerAntialiased;
     QPen mMedianPen;
     QCPScatterStyle mOutlierStyle;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const override;
 
     // introduced virtual methods:
     virtual void drawStatisticalBox(QCPPainter *painter, QCPStatisticalBoxDataContainer::const_iterator it,
                                     const QCPScatterStyle &outlierStyle) const;
 
     // non-virtual methods:
     void getVisibleDataBounds(QCPStatisticalBoxDataContainer::const_iterator &begin,
                               QCPStatisticalBoxDataContainer::const_iterator &end) const;
     QRectF getQuartileBox(QCPStatisticalBoxDataContainer::const_iterator it) const;
     QVector<QLineF> getWhiskerBackboneLines(QCPStatisticalBoxDataContainer::const_iterator it) const;
     QVector<QLineF> getWhiskerBarLines(QCPStatisticalBoxDataContainer::const_iterator it) const;
 
     friend class QCustomPlot;
     friend class QCPLegend;
 };
 
 /* end of 'src/plottables/plottable-statisticalbox.h' */
 
 /* including file 'src/plottables/plottable-colormap.h', size 7070           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPColorMapData
 {
   public:
     QCPColorMapData(int keySize, int valueSize, const QCPRange &keyRange, const QCPRange &valueRange);
     ~QCPColorMapData();
     QCPColorMapData(const QCPColorMapData &other);
     QCPColorMapData &operator=(const QCPColorMapData &other);
 
     // getters:
     int keySize() const { return mKeySize; }
     int valueSize() const { return mValueSize; }
     QCPRange keyRange() const { return mKeyRange; }
     QCPRange valueRange() const { return mValueRange; }
     QCPRange dataBounds() const { return mDataBounds; }
     double data(double key, double value);
     double cell(int keyIndex, int valueIndex);
     unsigned char alpha(int keyIndex, int valueIndex);
 
     // setters:
     void setSize(int keySize, int valueSize);
     void setKeySize(int keySize);
     void setValueSize(int valueSize);
     void setRange(const QCPRange &keyRange, const QCPRange &valueRange);
     void setKeyRange(const QCPRange &keyRange);
     void setValueRange(const QCPRange &valueRange);
     void setData(double key, double value, double z);
     void setCell(int keyIndex, int valueIndex, double z);
     void setAlpha(int keyIndex, int valueIndex, unsigned char alpha);
 
     // non-property methods:
     void recalculateDataBounds();
     void clear();
     void clearAlpha();
     void fill(double z);
     void fillAlpha(unsigned char alpha);
     bool isEmpty() const { return mIsEmpty; }
     void coordToCell(double key, double value, int *keyIndex, int *valueIndex) const;
     void cellToCoord(int keyIndex, int valueIndex, double *key, double *value) const;
 
   protected:
     // property members:
     int mKeySize, mValueSize;
     QCPRange mKeyRange, mValueRange;
     bool mIsEmpty;
 
     // non-property members:
     double *mData;
     unsigned char *mAlpha;
     QCPRange mDataBounds;
     bool mDataModified;
 
     bool createAlpha(bool initializeOpaque = true);
 
     friend class QCPColorMap;
 };
 
 class QCP_LIB_DECL QCPColorMap : public QCPAbstractPlottable
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QCPRange dataRange READ dataRange WRITE setDataRange NOTIFY dataRangeChanged)
     Q_PROPERTY(QCPAxis::ScaleType dataScaleType READ dataScaleType WRITE setDataScaleType NOTIFY dataScaleTypeChanged)
     Q_PROPERTY(QCPColorGradient gradient READ gradient WRITE setGradient NOTIFY gradientChanged)
     Q_PROPERTY(bool interpolate READ interpolate WRITE setInterpolate)
     Q_PROPERTY(bool tightBoundary READ tightBoundary WRITE setTightBoundary)
     Q_PROPERTY(QCPColorScale *colorScale READ colorScale WRITE setColorScale)
     /// \endcond
   public:
     explicit QCPColorMap(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPColorMap() override;
 
     // getters:
     QCPColorMapData *data() const { return mMapData; }
     QCPRange dataRange() const { return mDataRange; }
     QCPAxis::ScaleType dataScaleType() const { return mDataScaleType; }
     bool interpolate() const { return mInterpolate; }
     bool tightBoundary() const { return mTightBoundary; }
     QCPColorGradient gradient() const { return mGradient; }
     QCPColorScale *colorScale() const { return mColorScale.data(); }
 
     // setters:
     void setData(QCPColorMapData *data, bool copy = false);
     Q_SLOT void setDataRange(const QCPRange &dataRange);
     Q_SLOT void setDataScaleType(QCPAxis::ScaleType scaleType);
     Q_SLOT void setGradient(const QCPColorGradient &gradient);
     void setInterpolate(bool enabled);
     void setTightBoundary(bool enabled);
     void setColorScale(QCPColorScale *colorScale);
 
     // non-property methods:
     void rescaleDataRange(bool recalculateDataBounds = false);
     Q_SLOT void updateLegendIcon(Qt::TransformationMode transformMode = Qt::SmoothTransformation,
                                  const QSize &thumbSize               = QSize(32, 18));
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const override;
     QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const override;
 
   signals:
     void dataRangeChanged(const QCPRange &newRange);
     void dataScaleTypeChanged(QCPAxis::ScaleType scaleType);
     void gradientChanged(const QCPColorGradient &newGradient);
 
   protected:
     // property members:
     QCPRange mDataRange;
     QCPAxis::ScaleType mDataScaleType;
     QCPColorMapData *mMapData;
     QCPColorGradient mGradient;
     bool mInterpolate;
     bool mTightBoundary;
     QPointer<QCPColorScale> mColorScale;
 
     // non-property members:
     QImage mMapImage, mUndersampledMapImage;
     QPixmap mLegendIcon;
     bool mMapImageInvalidated;
 
     // introduced virtual methods:
     virtual void updateMapImage();
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const override;
 
     friend class QCustomPlot;
     friend class QCPLegend;
 };
 
 /* end of 'src/plottables/plottable-colormap.h' */
 
 /* including file 'src/plottables/plottable-financial.h', size 8622          */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPFinancialData
 {
   public:
     QCPFinancialData();
     QCPFinancialData(double key, double open, double high, double low, double close);
 
     inline double sortKey() const { return key; }
     inline static QCPFinancialData fromSortKey(double sortKey) { return QCPFinancialData(sortKey, 0, 0, 0, 0); }
     inline static bool sortKeyIsMainKey() { return true; }
 
     inline double mainKey() const { return key; }
     inline double mainValue() const { return open; }
 
     inline QCPRange valueRange() const
     {
         return QCPRange(low, high); // open and close must lie between low and high, so we don't need to check them
     }
 
     double key, open, high, low, close;
 };
 Q_DECLARE_TYPEINFO(QCPFinancialData, Q_PRIMITIVE_TYPE);
 
 /*! \typedef QCPFinancialDataContainer
 
   Container for storing \ref QCPFinancialData points. The data is stored sorted by \a key.
 
   This template instantiation is the container in which QCPFinancial holds its data. For details
   about the generic container, see the documentation of the class template \ref QCPDataContainer.
 
   \see QCPFinancialData, QCPFinancial::setData
 */
 typedef QCPDataContainer<QCPFinancialData> QCPFinancialDataContainer;
 
 class QCP_LIB_DECL QCPFinancial : public QCPAbstractPlottable1D<QCPFinancialData>
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(ChartStyle chartStyle READ chartStyle WRITE setChartStyle)
     Q_PROPERTY(double width READ width WRITE setWidth)
     Q_PROPERTY(WidthType widthType READ widthType WRITE setWidthType)
     Q_PROPERTY(bool twoColored READ twoColored WRITE setTwoColored)
     Q_PROPERTY(QBrush brushPositive READ brushPositive WRITE setBrushPositive)
     Q_PROPERTY(QBrush brushNegative READ brushNegative WRITE setBrushNegative)
     Q_PROPERTY(QPen penPositive READ penPositive WRITE setPenPositive)
     Q_PROPERTY(QPen penNegative READ penNegative WRITE setPenNegative)
     /// \endcond
   public:
     /*!
           Defines the ways the width of the financial bar can be specified. Thus it defines what the
           number passed to \ref setWidth actually means.
 
           \see setWidthType, setWidth
         */
     enum WidthType
     {
         wtAbsolute ///< width is in absolute pixels
         ,
         wtAxisRectRatio ///< width is given by a fraction of the axis rect size
         ,
         wtPlotCoords ///< width is in key coordinates and thus scales with the key axis range
     };
     Q_ENUM(WidthType)
 
     /*!
           Defines the possible representations of OHLC data in the plot.
 
           \see setChartStyle
         */
     enum ChartStyle
     {
         csOhlc ///< Open-High-Low-Close bar representation
         ,
         csCandlestick ///< Candlestick representation
     };
     Q_ENUM(ChartStyle)
 
     explicit QCPFinancial(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPFinancial() override;
 
     // getters:
     QSharedPointer<QCPFinancialDataContainer> data() const { return mDataContainer; }
     ChartStyle chartStyle() const { return mChartStyle; }
     double width() const { return mWidth; }
     WidthType widthType() const { return mWidthType; }
     bool twoColored() const { return mTwoColored; }
     QBrush brushPositive() const { return mBrushPositive; }
     QBrush brushNegative() const { return mBrushNegative; }
     QPen penPositive() const { return mPenPositive; }
     QPen penNegative() const { return mPenNegative; }
 
     // setters:
     void setData(QSharedPointer<QCPFinancialDataContainer> data);
     void setData(const QVector<double> &keys, const QVector<double> &open, const QVector<double> &high,
                  const QVector<double> &low, const QVector<double> &close, bool alreadySorted = false);
     void setChartStyle(ChartStyle style);
     void setWidth(double width);
     void setWidthType(WidthType widthType);
     void setTwoColored(bool twoColored);
     void setBrushPositive(const QBrush &brush);
     void setBrushNegative(const QBrush &brush);
     void setPenPositive(const QPen &pen);
     void setPenNegative(const QPen &pen);
 
     // non-property methods:
     void addData(const QVector<double> &keys, const QVector<double> &open, const QVector<double> &high,
                  const QVector<double> &low, const QVector<double> &close, bool alreadySorted = false);
     void addData(double key, double open, double high, double low, double close);
 
     // reimplemented virtual methods:
     QCPDataSelection selectTestRect(const QRectF &rect, bool onlySelectable) const override;
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const override;
     QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const override;
 
     // static methods:
     static QCPFinancialDataContainer timeSeriesToOhlc(const QVector<double> &time, const QVector<double> &value,
                                                       double timeBinSize, double timeBinOffset = 0);
 
   protected:
     // property members:
     ChartStyle mChartStyle;
     double mWidth;
     WidthType mWidthType;
     bool mTwoColored;
     QBrush mBrushPositive, mBrushNegative;
     QPen mPenPositive, mPenNegative;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const override;
 
     // non-virtual methods:
     void drawOhlcPlot(QCPPainter *painter, const QCPFinancialDataContainer::const_iterator &begin,
                       const QCPFinancialDataContainer::const_iterator &end, bool isSelected);
     void drawCandlestickPlot(QCPPainter *painter, const QCPFinancialDataContainer::const_iterator &begin,
                              const QCPFinancialDataContainer::const_iterator &end, bool isSelected);
     double getPixelWidth(double key, double keyPixel) const;
     double ohlcSelectTest(const QPointF &pos, const QCPFinancialDataContainer::const_iterator &begin,
                           const QCPFinancialDataContainer::const_iterator &end,
                           QCPFinancialDataContainer::const_iterator &closestDataPoint) const;
     double candlestickSelectTest(const QPointF &pos, const QCPFinancialDataContainer::const_iterator &begin,
                                  const QCPFinancialDataContainer::const_iterator &end,
                                  QCPFinancialDataContainer::const_iterator &closestDataPoint) const;
     void getVisibleDataBounds(QCPFinancialDataContainer::const_iterator &begin,
                               QCPFinancialDataContainer::const_iterator &end) const;
     QRectF selectionHitBox(QCPFinancialDataContainer::const_iterator it) const;
 
     friend class QCustomPlot;
     friend class QCPLegend;
 };
 Q_DECLARE_METATYPE(QCPFinancial::ChartStyle)
 
 /* end of 'src/plottables/plottable-financial.h' */
 
 /* including file 'src/plottables/plottable-errorbar.h', size 7567           */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPErrorBarsData
 {
   public:
     QCPErrorBarsData();
     explicit QCPErrorBarsData(double error);
     QCPErrorBarsData(double errorMinus, double errorPlus);
 
     double errorMinus, errorPlus;
 };
 Q_DECLARE_TYPEINFO(QCPErrorBarsData, Q_PRIMITIVE_TYPE);
 
 /*! \typedef QCPErrorBarsDataContainer
 
   Container for storing \ref QCPErrorBarsData points. It is a typedef for <tt>QVector<\ref
   QCPErrorBarsData></tt>.
 
   This is the container in which \ref QCPErrorBars holds its data. Unlike most other data
   containers for plottables, it is not based on \ref QCPDataContainer. This is because the error
   bars plottable is special in that it doesn't store its own key and value coordinate per error
   bar. It adopts the key and value from the plottable to which the error bars shall be applied
   (\ref QCPErrorBars::setDataPlottable). So the stored \ref QCPErrorBarsData doesn't need a
   sortable key, but merely an index (as \c QVector provides), which maps one-to-one to the indices
   of the other plottable's data.
 
   \see QCPErrorBarsData, QCPErrorBars::setData
 */
 typedef QVector<QCPErrorBarsData> QCPErrorBarsDataContainer;
 
 class QCP_LIB_DECL QCPErrorBars : public QCPAbstractPlottable, public QCPPlottableInterface1D
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QSharedPointer<QCPErrorBarsDataContainer> data READ data WRITE setData)
     Q_PROPERTY(QCPAbstractPlottable *dataPlottable READ dataPlottable WRITE setDataPlottable)
     Q_PROPERTY(ErrorType errorType READ errorType WRITE setErrorType)
     Q_PROPERTY(double whiskerWidth READ whiskerWidth WRITE setWhiskerWidth)
     Q_PROPERTY(double symbolGap READ symbolGap WRITE setSymbolGap)
     /// \endcond
   public:
     /*!
           Defines in which orientation the error bars shall appear. If your data needs both error
           dimensions, create two \ref QCPErrorBars with different \ref ErrorType.
 
           \see setErrorType
         */
     enum ErrorType
     {
         etKeyError ///< The errors are for the key dimension (bars appear parallel to the key axis)
         ,
         etValueError ///< The errors are for the value dimension (bars appear parallel to the value axis)
     };
     Q_ENUM(ErrorType)
 
     explicit QCPErrorBars(QCPAxis *keyAxis, QCPAxis *valueAxis);
     ~QCPErrorBars() override;
     // getters:
     QSharedPointer<QCPErrorBarsDataContainer> data() const { return mDataContainer; }
     QCPAbstractPlottable *dataPlottable() const { return mDataPlottable.data(); }
     ErrorType errorType() const { return mErrorType; }
     double whiskerWidth() const { return mWhiskerWidth; }
     double symbolGap() const { return mSymbolGap; }
 
     // setters:
     void setData(QSharedPointer<QCPErrorBarsDataContainer> data);
     void setData(const QVector<double> &error);
     void setData(const QVector<double> &errorMinus, const QVector<double> &errorPlus);
     void setDataPlottable(QCPAbstractPlottable *plottable);
     void setErrorType(ErrorType type);
     void setWhiskerWidth(double pixels);
     void setSymbolGap(double pixels);
 
     // non-property methods:
     void addData(const QVector<double> &error);
     void addData(const QVector<double> &errorMinus, const QVector<double> &errorPlus);
     void addData(double error);
     void addData(double errorMinus, double errorPlus);
 
     // virtual methods of 1d plottable interface:
     int dataCount() const override;
     double dataMainKey(int index) const override;
     double dataSortKey(int index) const override;
     double dataMainValue(int index) const override;
     QCPRange dataValueRange(int index) const override;
     QPointF dataPixelPosition(int index) const override;
     bool sortKeyIsMainKey() const override;
     QCPDataSelection selectTestRect(const QRectF &rect, bool onlySelectable) const override;
     int findBegin(double sortKey, bool expandedRange = true) const override;
     int findEnd(double sortKey, bool expandedRange = true) const override;
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
     QCPPlottableInterface1D *interface1D() override { return this; }
 
   protected:
     // property members:
     QSharedPointer<QCPErrorBarsDataContainer> mDataContainer;
     QPointer<QCPAbstractPlottable> mDataPlottable;
     ErrorType mErrorType;
     double mWhiskerWidth;
     double mSymbolGap;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     void drawLegendIcon(QCPPainter *painter, const QRectF &rect) const override;
     QCPRange getKeyRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth) const override;
     QCPRange getValueRange(bool &foundRange, QCP::SignDomain inSignDomain = QCP::sdBoth,
                                    const QCPRange &inKeyRange = QCPRange()) const override;
 
     // non-virtual methods:
     void getErrorBarLines(QCPErrorBarsDataContainer::const_iterator it, QVector<QLineF> &backbones,
                           QVector<QLineF> &whiskers) const;
     void getVisibleDataBounds(QCPErrorBarsDataContainer::const_iterator &begin,
                               QCPErrorBarsDataContainer::const_iterator &end,
                               const QCPDataRange &rangeRestriction) const;
     double pointDistance(const QPointF &pixelPoint, QCPErrorBarsDataContainer::const_iterator &closestData) const;
     // helpers:
     void getDataSegments(QList<QCPDataRange> &selectedSegments, QList<QCPDataRange> &unselectedSegments) const;
     bool errorBarVisible(int index) const;
     bool rectIntersectsLine(const QRectF &pixelRect, const QLineF &line) const;
 
     friend class QCustomPlot;
     friend class QCPLegend;
 };
 
 /* end of 'src/plottables/plottable-errorbar.h' */
 
 /* including file 'src/items/item-straightline.h', size 3117                 */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemStraightLine : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     /// \endcond
   public:
     explicit QCPItemStraightLine(QCustomPlot *parentPlot);
     ~QCPItemStraightLine() override;
 
     // getters:
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
 
     // setters;
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const point1;
     QCPItemPosition *const point2;
 
   protected:
     // property members:
     QPen mPen, mSelectedPen;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
 
     // non-virtual methods:
     QLineF getRectClippedStraightLine(const QCPVector2D &point1, const QCPVector2D &vec, const QRect &rect) const;
     QPen mainPen() const;
 };
 
 /* end of 'src/items/item-straightline.h' */
 
 /* including file 'src/items/item-line.h', size 3407                         */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemLine : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     Q_PROPERTY(QCPLineEnding head READ head WRITE setHead)
     Q_PROPERTY(QCPLineEnding tail READ tail WRITE setTail)
     /// \endcond
   public:
     explicit QCPItemLine(QCustomPlot *parentPlot);
     ~QCPItemLine() override;
 
     // getters:
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
     QCPLineEnding head() const { return mHead; }
     QCPLineEnding tail() const { return mTail; }
 
     // setters;
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
     void setHead(const QCPLineEnding &head);
     void setTail(const QCPLineEnding &tail);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const start;
     QCPItemPosition *const end;
 
   protected:
     // property members:
     QPen mPen, mSelectedPen;
     QCPLineEnding mHead, mTail;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
 
     // non-virtual methods:
     QLineF getRectClippedLine(const QCPVector2D &start, const QCPVector2D &end, const QRect &rect) const;
     QPen mainPen() const;
 };
 
 /* end of 'src/items/item-line.h' */
 
 /* including file 'src/items/item-curve.h', size 3379                        */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemCurve : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     Q_PROPERTY(QCPLineEnding head READ head WRITE setHead)
     Q_PROPERTY(QCPLineEnding tail READ tail WRITE setTail)
     /// \endcond
   public:
     explicit QCPItemCurve(QCustomPlot *parentPlot);
     ~QCPItemCurve() override;
 
     // getters:
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
     QCPLineEnding head() const { return mHead; }
     QCPLineEnding tail() const { return mTail; }
 
     // setters;
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
     void setHead(const QCPLineEnding &head);
     void setTail(const QCPLineEnding &tail);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const start;
     QCPItemPosition *const startDir;
     QCPItemPosition *const endDir;
     QCPItemPosition *const end;
 
   protected:
     // property members:
     QPen mPen, mSelectedPen;
     QCPLineEnding mHead, mTail;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
 
     // non-virtual methods:
     QPen mainPen() const;
 };
 
 /* end of 'src/items/item-curve.h' */
 
 /* including file 'src/items/item-rect.h', size 3688                         */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemRect : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     Q_PROPERTY(QBrush brush READ brush WRITE setBrush)
     Q_PROPERTY(QBrush selectedBrush READ selectedBrush WRITE setSelectedBrush)
     /// \endcond
   public:
     explicit QCPItemRect(QCustomPlot *parentPlot);
     ~QCPItemRect() override;
 
     // getters:
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
     QBrush brush() const { return mBrush; }
     QBrush selectedBrush() const { return mSelectedBrush; }
 
     // setters;
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setSelectedBrush(const QBrush &brush);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const topLeft;
     QCPItemPosition *const bottomRight;
     QCPItemAnchor *const top;
     QCPItemAnchor *const topRight;
     QCPItemAnchor *const right;
     QCPItemAnchor *const bottom;
     QCPItemAnchor *const bottomLeft;
     QCPItemAnchor *const left;
 
   protected:
     enum AnchorIndex
     {
         aiTop,
         aiTopRight,
         aiRight,
         aiBottom,
         aiBottomLeft,
         aiLeft
     };
 
     // property members:
     QPen mPen, mSelectedPen;
     QBrush mBrush, mSelectedBrush;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     QPointF anchorPixelPosition(int anchorId) const override;
 
     // non-virtual methods:
     QPen mainPen() const;
     QBrush mainBrush() const;
 };
 
 /* end of 'src/items/item-rect.h' */
 
 /* including file 'src/items/item-text.h', size 5554                         */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemText : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QColor color READ color WRITE setColor)
     Q_PROPERTY(QColor selectedColor READ selectedColor WRITE setSelectedColor)
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     Q_PROPERTY(QBrush brush READ brush WRITE setBrush)
     Q_PROPERTY(QBrush selectedBrush READ selectedBrush WRITE setSelectedBrush)
     Q_PROPERTY(QFont font READ font WRITE setFont)
     Q_PROPERTY(QFont selectedFont READ selectedFont WRITE setSelectedFont)
     Q_PROPERTY(QString text READ text WRITE setText)
     Q_PROPERTY(Qt::Alignment positionAlignment READ positionAlignment WRITE setPositionAlignment)
     Q_PROPERTY(Qt::Alignment textAlignment READ textAlignment WRITE setTextAlignment)
     Q_PROPERTY(double rotation READ rotation WRITE setRotation)
     Q_PROPERTY(QMargins padding READ padding WRITE setPadding)
     /// \endcond
   public:
     explicit QCPItemText(QCustomPlot *parentPlot);
     ~QCPItemText() override;
 
     // getters:
     QColor color() const { return mColor; }
     QColor selectedColor() const { return mSelectedColor; }
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
     QBrush brush() const { return mBrush; }
     QBrush selectedBrush() const { return mSelectedBrush; }
     QFont font() const { return mFont; }
     QFont selectedFont() const { return mSelectedFont; }
     QString text() const { return mText; }
     Qt::Alignment positionAlignment() const { return mPositionAlignment; }
     Qt::Alignment textAlignment() const { return mTextAlignment; }
     double rotation() const { return mRotation; }
     QMargins padding() const { return mPadding; }
 
     // setters;
     void setColor(const QColor &color);
     void setSelectedColor(const QColor &color);
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setSelectedBrush(const QBrush &brush);
     void setFont(const QFont &font);
     void setSelectedFont(const QFont &font);
     void setText(const QString &text);
     void setPositionAlignment(Qt::Alignment alignment);
     void setTextAlignment(Qt::Alignment alignment);
     void setRotation(double degrees);
     void setPadding(const QMargins &padding);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const position;
     QCPItemAnchor *const topLeft;
     QCPItemAnchor *const top;
     QCPItemAnchor *const topRight;
     QCPItemAnchor *const right;
     QCPItemAnchor *const bottomRight;
     QCPItemAnchor *const bottom;
     QCPItemAnchor *const bottomLeft;
     QCPItemAnchor *const left;
 
   protected:
     enum AnchorIndex
     {
         aiTopLeft,
         aiTop,
         aiTopRight,
         aiRight,
         aiBottomRight,
         aiBottom,
         aiBottomLeft,
         aiLeft
     };
 
     // property members:
     QColor mColor, mSelectedColor;
     QPen mPen, mSelectedPen;
     QBrush mBrush, mSelectedBrush;
     QFont mFont, mSelectedFont;
     QString mText;
     Qt::Alignment mPositionAlignment;
     Qt::Alignment mTextAlignment;
     double mRotation;
     QMargins mPadding;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     QPointF anchorPixelPosition(int anchorId) const override;
 
     // non-virtual methods:
     QPointF getTextDrawPoint(const QPointF &pos, const QRectF &rect, Qt::Alignment positionAlignment) const;
     QFont mainFont() const;
     QColor mainColor() const;
     QPen mainPen() const;
     QBrush mainBrush() const;
 };
 
 /* end of 'src/items/item-text.h' */
 
 /* including file 'src/items/item-ellipse.h', size 3868                      */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemEllipse : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     Q_PROPERTY(QBrush brush READ brush WRITE setBrush)
     Q_PROPERTY(QBrush selectedBrush READ selectedBrush WRITE setSelectedBrush)
     /// \endcond
   public:
     explicit QCPItemEllipse(QCustomPlot *parentPlot);
     ~QCPItemEllipse() override;
 
     // getters:
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
     QBrush brush() const { return mBrush; }
     QBrush selectedBrush() const { return mSelectedBrush; }
 
     // setters;
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setSelectedBrush(const QBrush &brush);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const topLeft;
     QCPItemPosition *const bottomRight;
     QCPItemAnchor *const topLeftRim;
     QCPItemAnchor *const top;
     QCPItemAnchor *const topRightRim;
     QCPItemAnchor *const right;
     QCPItemAnchor *const bottomRightRim;
     QCPItemAnchor *const bottom;
     QCPItemAnchor *const bottomLeftRim;
     QCPItemAnchor *const left;
     QCPItemAnchor *const center;
 
   protected:
     enum AnchorIndex
     {
         aiTopLeftRim,
         aiTop,
         aiTopRightRim,
         aiRight,
         aiBottomRightRim,
         aiBottom,
         aiBottomLeftRim,
         aiLeft,
         aiCenter
     };
 
     // property members:
     QPen mPen, mSelectedPen;
     QBrush mBrush, mSelectedBrush;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     QPointF anchorPixelPosition(int anchorId) const override;
 
     // non-virtual methods:
     QPen mainPen() const;
     QBrush mainBrush() const;
 };
 
 /* end of 'src/items/item-ellipse.h' */
 
 /* including file 'src/items/item-pixmap.h', size 4373                       */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemPixmap : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPixmap pixmap READ pixmap WRITE setPixmap)
     Q_PROPERTY(bool scaled READ scaled WRITE setScaled)
     Q_PROPERTY(Qt::AspectRatioMode aspectRatioMode READ aspectRatioMode)
     Q_PROPERTY(Qt::TransformationMode transformationMode READ transformationMode)
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     /// \endcond
   public:
     explicit QCPItemPixmap(QCustomPlot *parentPlot);
     ~QCPItemPixmap() override;
 
     // getters:
     QPixmap pixmap() const { return mPixmap; }
     bool scaled() const { return mScaled; }
     Qt::AspectRatioMode aspectRatioMode() const { return mAspectRatioMode; }
     Qt::TransformationMode transformationMode() const { return mTransformationMode; }
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
 
     // setters;
     void setPixmap(const QPixmap &pixmap);
     void setScaled(bool scaled, Qt::AspectRatioMode aspectRatioMode = Qt::KeepAspectRatio,
                    Qt::TransformationMode transformationMode = Qt::SmoothTransformation);
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const topLeft;
     QCPItemPosition *const bottomRight;
     QCPItemAnchor *const top;
     QCPItemAnchor *const topRight;
     QCPItemAnchor *const right;
     QCPItemAnchor *const bottom;
     QCPItemAnchor *const bottomLeft;
     QCPItemAnchor *const left;
 
   protected:
     enum AnchorIndex
     {
         aiTop,
         aiTopRight,
         aiRight,
         aiBottom,
         aiBottomLeft,
         aiLeft
     };
 
     // property members:
     QPixmap mPixmap;
     QPixmap mScaledPixmap;
     bool mScaled;
     bool mScaledPixmapInvalidated;
     Qt::AspectRatioMode mAspectRatioMode;
     Qt::TransformationMode mTransformationMode;
     QPen mPen, mSelectedPen;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     QPointF anchorPixelPosition(int anchorId) const override;
 
     // non-virtual methods:
     void updateScaledPixmap(QRect finalRect = QRect(), bool flipHorz = false, bool flipVert = false);
-    QRect getFinalRect(bool *flippedHorz = 0, bool *flippedVert = 0) const;
+    QRect getFinalRect(bool *flippedHorz = nullptr, bool *flippedVert = nullptr) const;
     QPen mainPen() const;
 };
 
 /* end of 'src/items/item-pixmap.h' */
 
 /* including file 'src/items/item-tracer.h', size 4762                       */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemTracer : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     Q_PROPERTY(QBrush brush READ brush WRITE setBrush)
     Q_PROPERTY(QBrush selectedBrush READ selectedBrush WRITE setSelectedBrush)
     Q_PROPERTY(double size READ size WRITE setSize)
     Q_PROPERTY(TracerStyle style READ style WRITE setStyle)
     Q_PROPERTY(QCPGraph *graph READ graph WRITE setGraph)
     Q_PROPERTY(double graphKey READ graphKey WRITE setGraphKey)
     Q_PROPERTY(bool interpolating READ interpolating WRITE setInterpolating)
     /// \endcond
   public:
     /*!
           The different visual appearances a tracer item can have. Some styles size may be controlled with \ref setSize.
 
           \see setStyle
         */
     enum TracerStyle
     {
         tsNone ///< The tracer is not visible
         ,
         tsPlus ///< A plus shaped crosshair with limited size
         ,
         tsCrosshair ///< A plus shaped crosshair which spans the complete axis rect
         ,
         tsCircle ///< A circle
         ,
         tsSquare ///< A square
     };
     Q_ENUM(TracerStyle)
 
     explicit QCPItemTracer(QCustomPlot *parentPlot);
     ~QCPItemTracer() override;
 
     // getters:
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
     QBrush brush() const { return mBrush; }
     QBrush selectedBrush() const { return mSelectedBrush; }
     double size() const { return mSize; }
     TracerStyle style() const { return mStyle; }
     QCPGraph *graph() const { return mGraph; }
     double graphKey() const { return mGraphKey; }
     bool interpolating() const { return mInterpolating; }
 
     // setters;
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
     void setBrush(const QBrush &brush);
     void setSelectedBrush(const QBrush &brush);
     void setSize(double size);
     void setStyle(TracerStyle style);
     void setGraph(QCPGraph *graph);
     void setGraphKey(double key);
     void setInterpolating(bool enabled);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     // non-virtual methods:
     void updatePosition();
 
     QCPItemPosition *const position;
 
   protected:
     // property members:
     QPen mPen, mSelectedPen;
     QBrush mBrush, mSelectedBrush;
     double mSize;
     TracerStyle mStyle;
     QCPGraph *mGraph;
     double mGraphKey;
     bool mInterpolating;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
 
     // non-virtual methods:
     QPen mainPen() const;
     QBrush mainBrush() const;
 };
 Q_DECLARE_METATYPE(QCPItemTracer::TracerStyle)
 
 /* end of 'src/items/item-tracer.h' */
 
 /* including file 'src/items/item-bracket.h', size 3969                      */
 /* commit 633339dadc92cb10c58ef3556b55570685fafb99 2016-09-13 23:54:56 +0200 */
 
 class QCP_LIB_DECL QCPItemBracket : public QCPAbstractItem
 {
     Q_OBJECT
     /// \cond INCLUDE_QPROPERTIES
     Q_PROPERTY(QPen pen READ pen WRITE setPen)
     Q_PROPERTY(QPen selectedPen READ selectedPen WRITE setSelectedPen)
     Q_PROPERTY(double length READ length WRITE setLength)
     Q_PROPERTY(BracketStyle style READ style WRITE setStyle)
     /// \endcond
   public:
     /*!
           Defines the various visual shapes of the bracket item. The appearance can be further modified
           by \ref setLength and \ref setPen.
 
           \see setStyle
         */
     enum BracketStyle
     {
         bsSquare ///< A brace with angled edges
         ,
         bsRound ///< A brace with round edges
         ,
         bsCurly ///< A curly brace
         ,
         bsCalligraphic ///< A curly brace with varying stroke width giving a calligraphic impression
     };
     Q_ENUM(BracketStyle)
 
     explicit QCPItemBracket(QCustomPlot *parentPlot);
     ~QCPItemBracket() override;
 
     // getters:
     QPen pen() const { return mPen; }
     QPen selectedPen() const { return mSelectedPen; }
     double length() const { return mLength; }
     BracketStyle style() const { return mStyle; }
 
     // setters;
     void setPen(const QPen &pen);
     void setSelectedPen(const QPen &pen);
     void setLength(double length);
     void setStyle(BracketStyle style);
 
     // reimplemented virtual methods:
-    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = 0) const override;
+    double selectTest(const QPointF &pos, bool onlySelectable, QVariant *details = nullptr) const override;
 
     QCPItemPosition *const left;
     QCPItemPosition *const right;
     QCPItemAnchor *const center;
 
   protected:
     // property members:
     enum AnchorIndex
     {
         aiCenter
     };
     QPen mPen, mSelectedPen;
     double mLength;
     BracketStyle mStyle;
 
     // reimplemented virtual methods:
     void draw(QCPPainter *painter) override;
     QPointF anchorPixelPosition(int anchorId) const override;
 
     // non-virtual methods:
     QPen mainPen() const;
 };
 Q_DECLARE_METATYPE(QCPItemBracket::BracketStyle)
 
 /* end of 'src/items/item-bracket.h' */
 
 #endif // QCUSTOMPLOT_H
diff --git a/kstars/auxiliary/skyobjectlistmodel.h b/kstars/auxiliary/skyobjectlistmodel.h
index daa4cc626..2fe49b4c3 100644
--- a/kstars/auxiliary/skyobjectlistmodel.h
+++ b/kstars/auxiliary/skyobjectlistmodel.h
@@ -1,68 +1,68 @@
 /***************************************************************************
                           skyobjectlistmodel.h  -  K Desktop Planetarium
                              -------------------
     begin                : Wed Jul 29 2016
     copyright            : (C) 2016 by Artem Fedoskin
     email                : afedoskin3@gmail.com
  ***************************************************************************/
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef SKYOBJECTLISTMODEL_H_
 #define SKYOBJECTLISTMODEL_H_
 
 #include <QAbstractListModel>
 #include <QDebug>
 
 class SkyObject;
 
 /** @class SkyObjectListModel
  * A model used in Find Object Dialog in QML. Each entry is a QString (name of object) and pointer to
  * SkyObject itself
  *
  * @short Model that is used in Find Object Dialog
  * @author Artem Fedoskin, Jason Harris
  * @version 1.0
  */
 class SkyObjectListModel : public QAbstractListModel
 {
     Q_OBJECT
   public:
     enum DemoRoles
     {
         SkyObjectRole = Qt::UserRole + 1,
     };
 
-    explicit SkyObjectListModel(QObject *parent = 0);
+    explicit SkyObjectListModel(QObject *parent = nullptr);
 
     int rowCount(const QModelIndex &) const override { return skyObjects.size(); }
     QVariant data(const QModelIndex &index, int role) const override;
 
     QHash<int, QByteArray> roleNames() const override;
 
     /**
          * @return index of object from skyObjects with name objectName. -1 if object with such
          * name was not found
          */
     int indexOf(QString objectName) const;
 
     /**
          * @short filter
          * @param regEx
          * @return
          */
     QStringList filter(QRegExp regEx);
 
     void setSkyObjectsList(QVector<QPair<QString, const SkyObject *>> sObjects);
 
   private:
     QVector<QPair<QString, const SkyObject *>> skyObjects;
 };
 
 #endif
diff --git a/kstars/auxiliary/thumbnailpicker.cpp b/kstars/auxiliary/thumbnailpicker.cpp
index 0c3b6146d..9b189550a 100644
--- a/kstars/auxiliary/thumbnailpicker.cpp
+++ b/kstars/auxiliary/thumbnailpicker.cpp
@@ -1,384 +1,384 @@
 /***************************************************************************
                           thumbnailpicker.cpp  -  description
                              -------------------
     begin                : Thu Mar 2 2005
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "thumbnailpicker.h"
 
 #include "ksutils.h"
 #include "thumbnaileditor.h"
 #include "dialogs/detaildialog.h"
 #include "skyobjects/skyobject.h"
 
 #include <KIO/CopyJob>
 #include <KMessageBox>
 #include <KJobUiDelegate>
 
 #include <QDebug>
 #include <QDesktopWidget>
 #include <QLineEdit>
 #include <QPainter>
 #include <QPointer>
 #include <QUrlQuery>
 
 ThumbnailPickerUI::ThumbnailPickerUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 ThumbnailPicker::ThumbnailPicker(SkyObject *o, const QPixmap &current, QWidget *parent, double _w, double _h,
                                  QString cap)
     : QDialog(parent), SelectedImageIndex(-1), Object(o), bImageFound(false)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     thumbWidth  = _w;
     thumbHeight = _h;
     Image       = new QPixmap(current.scaled(_w, _h, Qt::KeepAspectRatio, Qt::FastTransformation));
     ImageRect   = new QRect(0, 0, 200, 200);
 
     ui = new ThumbnailPickerUI(this);
 
     setWindowTitle(cap);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(ui);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     ui->CurrentImage->setPixmap(*Image);
 
     connect(ui->EditButton, SIGNAL(clicked()), this, SLOT(slotEditImage()));
     connect(ui->UnsetButton, SIGNAL(clicked()), this, SLOT(slotUnsetImage()));
     connect(ui->ImageList, SIGNAL(currentRowChanged(int)), this, SLOT(slotSetFromList(int)));
     connect(ui->ImageURLBox, SIGNAL(urlSelected(QUrl)), this, SLOT(slotSetFromURL()));
     connect(ui->ImageURLBox, SIGNAL(returnPressed()), this, SLOT(slotSetFromURL()));
 
     //ui->ImageURLBox->lineEdit()->setTrapReturnKey( true );
     ui->EditButton->setEnabled(false);
 
     slotFillList();
 }
 
 ThumbnailPicker::~ThumbnailPicker()
 {
     while (!PixList.isEmpty())
         delete PixList.takeFirst();
 }
 
 //Query online sources for images of the object
 void ThumbnailPicker::slotFillList()
 {
     //Query Google Image Search:
 
     //Search for the primary name, or longname and primary name
     QString sName = QString("%1 ").arg(Object->name());
     if (Object->longname() != Object->name())
     {
         sName = QString("%1 ").arg(Object->longname()) + sName;
     }
     QString query =
         QString("http://www.google.com/search?q=%1&tbs=itp:photo,isz:ex,iszw:200,iszh:200&tbm=isch&source=lnt")
             .arg(sName);
     QUrlQuery gURL(query);
 
     //gURL.addQueryItem( "q", sName ); //add the Google-image query string
 
     parseGooglePage(gURL.query());
 }
 
 void ThumbnailPicker::slotProcessGoogleResult(KJob *result)
 {
     //Preload ImageList with the URLs in the object's ImageList:
     QStringList ImageList(Object->ImageList());
 
     if (result->error())
     {
         result->uiDelegate()->showErrorMessage();
         result->kill();
         return;
     }
 
     QString PageHTML(static_cast<KIO::StoredTransferJob *>(result)->data());
 
     int index = PageHTML.indexOf("src=\"http:", 0);
     while (index >= 0)
     {
         index += 5; //move to end of "src=\"http:" marker
 
         //Image URL is everything from index to next occurrence of "\""
         ImageList.append(PageHTML.mid(index, PageHTML.indexOf("\"", index) - index));
 
         index = PageHTML.indexOf("src=\"http:", index);
     }
 
     //Total Number of images to be loaded:
     int nImages = ImageList.count();
     if (nImages)
     {
         ui->SearchProgress->setMinimum(0);
         ui->SearchProgress->setMaximum(nImages - 1);
         ui->SearchLabel->setText(i18n("Loading images..."));
     }
     else
     {
         close();
         return;
     }
 
     //Add images from the ImageList
     for (int i = 0; i < ImageList.size(); ++i)
     {
         QUrl u(ImageList[i]);
 
         if (u.isValid())
         {
             KIO::StoredTransferJob *j = KIO::storedGet(u, KIO::NoReload, KIO::HideProgressInfo);
-            j->setUiDelegate(0);
+            j->setUiDelegate(nullptr);
             connect(j, SIGNAL(result(KJob*)), SLOT(slotJobResult(KJob*)));
         }
     }
 }
 
 void ThumbnailPicker::slotJobResult(KJob *job)
 {
     KIO::StoredTransferJob *stjob = (KIO::StoredTransferJob *)job;
 
     //Update Progressbar
     if (!ui->SearchProgress->isHidden())
     {
         ui->SearchProgress->setValue(ui->SearchProgress->value() + 1);
         if (ui->SearchProgress->value() == ui->SearchProgress->maximum())
         {
             ui->SearchProgress->hide();
             ui->SearchLabel->setText(i18n("Search results:"));
         }
     }
 
     //If there was a problem, just return silently without adding image to list.
     if (job->error())
     {
         qDebug() << " error=" << job->error();
         job->kill();
         return;
     }
 
     QPixmap *pm = new QPixmap();
     pm->loadFromData(stjob->data());
 
     uint w = pm->width();
     uint h = pm->height();
     uint pad =
         0; /*FIXME LATER 4* QDialogBase::marginHint() + 2*ui->SearchLabel->height() + QDialogBase::actionButton( QDialogBase::Ok )->height() + 25;*/
     uint hDesk = QApplication::desktop()->availableGeometry().height() - pad;
 
     if (h > hDesk)
         *pm = pm->scaled(w * hDesk / h, hDesk, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
 
     PixList.append(pm);
 
     //Add 50x50 image and URL to listbox
     //ui->ImageList->insertItem( shrinkImage( PixList.last(), 50 ),
     //		cjob->srcURLs().first().prettyUrl() );
     ui->ImageList->addItem(new QListWidgetItem(QIcon(shrinkImage(PixList.last(), 200)), stjob->url().url()));
 }
 
 //void ThumbnailPicker::parseGooglePage( QStringList &ImList, const QString &URL )
 void ThumbnailPicker::parseGooglePage(const QString &URL)
 {
     QUrl googleURL(URL);
     KIO::StoredTransferJob *job = KIO::storedGet(googleURL);
     connect(job, SIGNAL(result(KJob*)), this, SLOT(slotProcessGoogleResult(KJob*)));
 
     job->start();
 }
 
 QPixmap ThumbnailPicker::shrinkImage(QPixmap *pm, int size, bool setImage)
 {
     int w(pm->width()), h(pm->height());
     int bigSize(w);
     int rx(0), ry(0), sx(0), sy(0), bx(0), by(0);
     if (size == 0)
         return QPixmap();
 
     //Prepare variables for rescaling image (if it is larger than 'size')
     if (w > size && w >= h)
     {
         h = size;
         w = size * pm->width() / pm->height();
     }
     else if (h > size && h > w)
     {
         w = size;
         h = size * pm->height() / pm->width();
     }
     sx = (w - size) / 2;
     sy = (h - size) / 2;
     if (sx < 0)
     {
         rx = -sx;
         sx = 0;
     }
     if (sy < 0)
     {
         ry = -sy;
         sy = 0;
     }
 
     if (setImage)
         bigSize = int(200. * float(pm->width()) / float(w));
 
     QPixmap result(size, size);
     result.fill(Qt::black); //in case final image is smaller than 'size'
 
     if (pm->width() > size || pm->height() > size) //image larger than 'size'?
     {
         //convert to QImage so we can smoothscale it
         QImage im(pm->toImage());
         im = im.scaled(w, h, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
 
         //bitBlt sizexsize square section of image
         QPainter p;
         p.begin(&result);
         p.drawImage(rx, ry, im, sx, sy, size, size);
         p.end();
 
         if (setImage)
         {
             bx = int(sx * float(pm->width()) / float(w));
             by = int(sy * float(pm->width()) / float(w));
             ImageRect->setRect(bx, by, bigSize, bigSize);
         }
     }
     else //image is smaller than size x size
     {
         QPainter p;
         p.begin(&result);
         p.drawImage(rx, ry, pm->toImage());
         p.end();
 
         if (setImage)
         {
             bx = int(rx * float(pm->width()) / float(w));
             by = int(ry * float(pm->width()) / float(w));
             ImageRect->setRect(bx, by, bigSize, bigSize);
         }
     }
 
     return result;
 }
 
 void ThumbnailPicker::slotEditImage()
 {
     QPointer<ThumbnailEditor> te = new ThumbnailEditor(this, thumbWidth, thumbHeight);
     if (te->exec() == QDialog::Accepted)
     {
         QPixmap pm = te->thumbnail();
         *Image     = pm;
         ui->CurrentImage->setPixmap(pm);
         ui->CurrentImage->update();
     }
     delete te;
 }
 
 void ThumbnailPicker::slotUnsetImage()
 {
     //  QFile file;
     //if ( KSUtils::openDataFile( file, "noimage.png" ) ) {
     //    file.close();
     //     Image->load( file.fileName(), "PNG" );
     // } else {
     //     *Image = Image->scaled( dd->thumbnail()->width(), dd->thumbnail()->height() );
     //      Image->fill( dd->palette().color( QPalette::Window ) );
     //  }
 
     QPixmap noImage;
     noImage.load(":/images/noimage.png");
     Image = new QPixmap(noImage.scaled(thumbWidth, thumbHeight, Qt::KeepAspectRatio, Qt::FastTransformation));
 
     ui->EditButton->setEnabled(false);
     ui->CurrentImage->setPixmap(*Image);
     ui->CurrentImage->update();
 
     bImageFound = false;
 }
 
 void ThumbnailPicker::slotSetFromList(int i)
 {
     //Display image in preview pane
     QPixmap pm;
     pm                 = shrinkImage(PixList[i], 200, true); //scale image
     SelectedImageIndex = i;
 
     ui->CurrentImage->setPixmap(pm);
     ui->CurrentImage->update();
     ui->EditButton->setEnabled(true);
 
     *Image      = PixList[i]->scaled(thumbWidth, thumbHeight, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
     bImageFound = true;
 }
 
 void ThumbnailPicker::slotSetFromURL()
 {
     //Attempt to load the specified URL
     QUrl u = ui->ImageURLBox->url();
 
     if (u.isValid())
     {
         if (u.isLocalFile())
         {
             QFile localFile(u.toLocalFile());
 
             //Add image to list
             //If image is taller than desktop, rescale it.
             QImage im(localFile.fileName());
 
             if (im.isNull())
             {
-                KMessageBox::sorry(0, i18n("Failed to load image at %1", localFile.fileName()),
+                KMessageBox::sorry(nullptr, i18n("Failed to load image at %1", localFile.fileName()),
                                    i18n("Failed to load image"));
                 return;
             }
 
             uint w = im.width();
             uint h = im.height();
             uint pad =
                 0; /* FIXME later 4*marginHint() + 2*ui->SearchLabel->height() + actionButton( Ok )->height() + 25; */
             uint hDesk = QApplication::desktop()->availableGeometry().height() - pad;
 
             if (h > hDesk)
                 im = im.scaled(w * hDesk / h, hDesk, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
 
             //Add Image to top of list and 50x50 thumbnail image and URL to top of listbox
             PixList.insert(0, new QPixmap(QPixmap::fromImage(im)));
             ui->ImageList->insertItem(0, new QListWidgetItem(QIcon(shrinkImage(PixList.last(), 50)), u.url()));
 
             //Select the new image
             ui->ImageList->setCurrentRow(0);
             slotSetFromList(0);
         }
         else
         {
             KIO::StoredTransferJob *j = KIO::storedGet(u, KIO::NoReload, KIO::HideProgressInfo);
-            j->setUiDelegate(0);
+            j->setUiDelegate(nullptr);
             connect(j, SIGNAL(result(KJob*)), SLOT(slotJobResult(KJob*)));
         }
     }
 }
diff --git a/kstars/auxiliary/thumbnailpicker.h b/kstars/auxiliary/thumbnailpicker.h
index 5729f12af..2711df17d 100644
--- a/kstars/auxiliary/thumbnailpicker.h
+++ b/kstars/auxiliary/thumbnailpicker.h
@@ -1,81 +1,81 @@
 /***************************************************************************
                           thumbnailpicker.h  -  description
                              -------------------
     begin                : Thu Mar 2 2005
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "ui_thumbnailpicker.h"
 
 #include <KIO/Job>
 
 #include <QDialog>
 #include <QPixmap>
 
 class QRect;
 class KJob;
 class DetailDialog;
 class SkyObject;
 
 class ThumbnailPickerUI : public QFrame, public Ui::ThumbnailPicker
 {
     Q_OBJECT
   public:
     explicit ThumbnailPickerUI(QWidget *p);
 };
 
 /**
  * @short Dialog for modifying an object's thumbnail image
  *
  * @author Jason Harris
  */
 class ThumbnailPicker : public QDialog
 {
     Q_OBJECT
   public:
-    ThumbnailPicker(SkyObject *o, const QPixmap &current, QWidget *parent = 0, double w = 200, double h = 200,
+    ThumbnailPicker(SkyObject *o, const QPixmap &current, QWidget *parent = nullptr, double w = 200, double h = 200,
                     QString cap = i18n("Choose Thumbnail Image"));
     ~ThumbnailPicker() override;
 
     QPixmap *image() { return Image; }
     QPixmap *currentListImage() { return PixList.at(SelectedImageIndex); }
     bool imageFound() const { return bImageFound; }
     QRect *imageRect() const { return ImageRect; }
 
   private slots:
     void slotEditImage();
     void slotUnsetImage();
     void slotSetFromList(int i);
     void slotSetFromURL();
     void slotFillList();
     void slotProcessGoogleResult(KJob *);
 
     /** Make sure download has finished, then make sure file exists, then add image to list */
     void slotJobResult(KJob *);
 
   private:
     QPixmap shrinkImage(QPixmap *original, int newSize, bool setImage = false);
     void parseGooglePage(const QString &URL);
 
     int SelectedImageIndex;
     double thumbWidth, thumbHeight;
     ThumbnailPickerUI *ui;
     QPixmap *Image;
     SkyObject *Object;
     QList<KIO::Job *> JobList;
     QList<QPixmap *> PixList;
     bool bImageFound;
     QRect *ImageRect;
 };
diff --git a/kstars/dialogs/addcatdialog.cpp b/kstars/dialogs/addcatdialog.cpp
index 6d6e9b75e..0335161a6 100644
--- a/kstars/dialogs/addcatdialog.cpp
+++ b/kstars/dialogs/addcatdialog.cpp
@@ -1,259 +1,259 @@
 /***************************************************************************
                           addcatdialog.cpp  -  description
                              -------------------
     begin                : Sun Mar 3 2002
     copyright            : (C) 2002 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "addcatdialog.h"
 
 #include "kstarsdata.h"
 #include "skycomponents/skymapcomposite.h"
 
 #include <KLineEdit>
 #include <KMessageBox>
 
 #include <QTextStream>
 #include <QUrl>
 
 AddCatDialogUI::AddCatDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 AddCatDialog::AddCatDialog(QWidget *parent) : QDialog(parent)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     QDir::setCurrent(QDir::homePath());
     acd = new AddCatDialogUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(acd);
     setLayout(mainLayout);
 
     setWindowTitle(i18n("Import Catalog"));
 
     QDialogButtonBox *buttonBox =
         new QDialogButtonBox(QDialogButtonBox::Help | QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
 
     connect(acd->DataURL->lineEdit(), SIGNAL(lostFocus()), this, SLOT(slotShowDataFile()));
     connect(acd->DataURL, SIGNAL(urlSelected(QUrl)), this, SLOT(slotShowDataFile()));
     connect(acd->PreviewButton, SIGNAL(clicked()), this, SLOT(slotPreviewCatalog()));
     connect(buttonBox->button(QDialogButtonBox::Ok), SIGNAL(clicked()), this, SLOT(slotCreateCatalog()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(close()));
     connect(buttonBox, SIGNAL(helpRequested()), this, SLOT(slotHelp()));
 
     acd->FieldList->addItem(i18n("ID Number"));
     acd->FieldList->addItem(i18n("Right Ascension"));
     acd->FieldList->addItem(i18n("Declination"));
     acd->FieldList->addItem(i18n("Object Type"));
 
     acd->FieldPool->addItem(i18n("Common Name"));
     acd->FieldPool->addItem(i18n("Magnitude"));
     acd->FieldPool->addItem(i18n("Flux"));
     acd->FieldPool->addItem(i18n("Major Axis"));
     acd->FieldPool->addItem(i18n("Minor Axis"));
     acd->FieldPool->addItem(i18n("Position Angle"));
     acd->FieldPool->addItem(i18n("Ignore"));
 }
 
 void AddCatDialog::slotHelp()
 {
     QString message =
         i18n("A valid custom catalog file has one line per object, "
              "with the following fields in each line:") +
         "\n\t" +
         i18n("1. Type identifier.  Must be one of: 0 (star), 3 (open cluster), 4 (globular cluster), "
              "5 (gaseous nebula), 6 (planetary nebula), 7 (supernova remnant), or 8 (galaxy)") +
         "\n\t" + i18n("2. Right Ascension (floating-point value)") + "\n\t" +
         i18n("3. Declination (floating-point value)") + "\n\t" + i18n("4. Magnitude (floating-point value)") + "\n\t" +
         i18n("5. Integrated Flux (floating-point value); frequency and units are set separately in the catalog file.") +
         "\n\t" + i18n("6. Spectral type (if type=0); otherwise object's catalog name") + "\n\t" +
         i18n("7. Star name (if type=0); otherwise object's common name. [field 7 is optional]") + "\n\n" +
 
         i18n("The fields should be separated by whitespace.  In addition, the catalog "
              "may contain comment lines beginning with \'#\'.");
 
-    KMessageBox::information(0, message, i18n("Help on custom catalog file format"));
+    KMessageBox::information(nullptr, message, i18n("Help on custom catalog file format"));
 }
 
 /* Attempt to parse the catalog data file specified in the DataURL box.
  * We assume the data file has space-separated fields, and that each line has
  * the data fields listed in the Catalog fields list, in the same order.
  * Each data field is parsed as follows:
  *
  * ID number: integer value
  * Right Ascension: colon-delimited hh:mm:ss.s or floating-point value
  * Declination: colon-delimited dd:mm:ss.s or floating-point value
  * Object type: integer value, one of [ 0,1,2,3,4,5,6,7,8 ]
  * Common name: string value (if it contains a space, it *must* be enclosed in quotes!)
  * Magnitude: floating-point value
  * Major axis: floating-point value (length of major axis in arcmin)
  * Minor axis: floating-point value (length of minor axis in arcmin)
  * Position angle: floating-point value (position angle, in degrees)
  */
 bool AddCatDialog::validateDataFile()
 {
     //Create the catalog file contents: first the header
     CatalogContents = writeCatalogHeader();
 
     // Check if the URL is empty
     if (acd->DataURL->url().isEmpty())
         return false;
 
     //Next, the data lines (fill from user-specified file)
     QFile dataFile(acd->DataURL->url().toLocalFile());
     if (dataFile.open(QIODevice::ReadOnly))
     {
         QTextStream dataStream(&dataFile);
         CatalogContents += dataStream.readAll();
 
         dataFile.close();
         return true;
     }
 
     return false;
 }
 
 QString AddCatDialog::writeCatalogHeader()
 {
     QString name   = (acd->CatalogName->text().isEmpty() ? i18n("Custom") : acd->CatalogName->text());
     QString pre    = (acd->Prefix->text().isEmpty() ? "CC" : acd->Prefix->text());
     char delimiter = (acd->CSVButton->isChecked() ? ',' : ' ');
 
     QString h = QString("# Delimiter: %1\n").arg(delimiter);
     h += QString("# Name: %1\n").arg(name);
     h += QString("# Prefix: %1\n").arg(pre);
     h += QString("# Color: %1\n").arg(acd->ColorButton->color().name());
     h += QString("# Epoch: %1\n").arg(acd->Epoch->value());
     h += QString("# ");
 
     for (int i = 0; i < acd->FieldList->count(); ++i)
     {
         QString f = acd->FieldList->item(i)->text();
 
         if (f == i18n("ID Number"))
         {
             h += "ID  ";
         }
         else if (f == i18n("Right Ascension"))
         {
             h += "RA  ";
         }
         else if (f == i18n("Declination"))
         {
             h += "Dc  ";
         }
         else if (f == i18n("Object Type"))
         {
             h += "Tp  ";
         }
         else if (f == i18n("Common Name"))
         {
             h += "Nm  ";
         }
         else if (f == i18n("Magnitude"))
         {
             h += "Mg  ";
         }
         else if (f == i18n("Flux"))
         {
             h += "Flux  ";
         }
         else if (f == i18n("Major Axis"))
         {
             h += "Mj  ";
         }
         else if (f == i18n("Minor Axis"))
         {
             h += "Mn  ";
         }
         else if (f == i18n("Position Angle"))
         {
             h += "PA  ";
         }
         else if (f == i18n("Ignore"))
         {
             h += "Ig  ";
         }
     }
 
     h += '\n';
 
     return h;
 }
 
 void AddCatDialog::slotShowDataFile()
 {
     QFile dataFile(acd->DataURL->url().toLocalFile());
     if (!acd->DataURL->url().isEmpty() && dataFile.open(QIODevice::ReadOnly))
     {
         acd->DataFileBox->clear();
         QTextStream dataStream(&dataFile);
         acd->DataFileBox->addItems(dataStream.readAll().split('\n'));
         dataFile.close();
     }
 }
 
 void AddCatDialog::slotPreviewCatalog()
 {
     if (validateDataFile())
     {
-        KMessageBox::informationList(0, i18n("Preview of %1", acd->CatalogName->text()), CatalogContents.split('\n'),
+        KMessageBox::informationList(nullptr, i18n("Preview of %1", acd->CatalogName->text()), CatalogContents.split('\n'),
                                      i18n("Catalog Preview"));
     }
 }
 
 void AddCatDialog::slotCreateCatalog()
 {
     if (validateDataFile())
     {
         //CatalogContents now contains the text for the catalog file,
         //and objList contains the parsed objects
 
         //Warn user if file exists!
         if (QFile::exists(acd->CatalogURL->url().toLocalFile()))
         {
             QUrl u(acd->CatalogURL->url());
-            int r = KMessageBox::warningContinueCancel(0,
+            int r = KMessageBox::warningContinueCancel(nullptr,
                                                        i18n("A file named \"%1\" already exists. "
                                                             "Overwrite it?",
                                                             u.fileName()),
                                                        i18n("Overwrite File?"), KStandardGuiItem::overwrite());
 
             if (r == KMessageBox::Cancel)
                 return;
         }
 
         QFile OutFile(acd->CatalogURL->url().toLocalFile());
         if (!OutFile.open(QIODevice::WriteOnly))
         {
-            KMessageBox::sorry(0, i18n("Could not open the file %1 for writing.", acd->CatalogURL->url().toLocalFile()),
+            KMessageBox::sorry(nullptr, i18n("Could not open the file %1 for writing.", acd->CatalogURL->url().toLocalFile()),
                                i18n("Error Opening Output File"));
         }
         else
         {
             QTextStream outStream(&OutFile);
             outStream << CatalogContents;
             OutFile.close();
 
             KStarsData::Instance()->skyComposite()->addCustomCatalog(OutFile.fileName(), 0);
 
             QDialog::accept();
             close();
         }
     }
 }
diff --git a/kstars/dialogs/addlinkdialog.cpp b/kstars/dialogs/addlinkdialog.cpp
index 7a966d0a1..27812b8d6 100644
--- a/kstars/dialogs/addlinkdialog.cpp
+++ b/kstars/dialogs/addlinkdialog.cpp
@@ -1,86 +1,86 @@
 /***************************************************************************
                           addlinkdialog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Oct 21 2001
     copyright            : (C) 2001 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "addlinkdialog.h"
 
 #include <QPushButton>
 #include <QUrl>
 #include <QDesktopServices>
 
 #include <KMessageBox>
 #include <KToolInvocation>
 
 #include "skyobjects/skyobject.h"
 
 AddLinkDialogUI::AddLinkDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 AddLinkDialog::AddLinkDialog(QWidget *parent, const QString &oname) : QDialog(parent), ObjectName(oname)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     ald = new AddLinkDialogUI(this);
 
     setWindowTitle(i18n("Add Custom URL to %1", oname));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(ald);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     //connect signals to slots
     connect(ald->URLButton, SIGNAL(clicked()), this, SLOT(checkURL()));
     connect(ald->ImageRadio, SIGNAL(toggled(bool)), this, SLOT(changeDefaultDescription(bool)));
 
     ald->ImageRadio->setChecked(true);
     ald->DescBox->setText(i18n("Show image of ") + ObjectName);
 }
 
 void AddLinkDialog::checkURL(void)
 {
     QUrl _url(url());
     if (_url.isValid()) //Is the string a valid URL?
     {
         QDesktopServices::openUrl(_url); //If so, launch the browser to see if it's the correct document
     }
     else //If not, print a warning message box that offers to open the browser to a search engine.
     {
         QString message =
             i18n("The URL is not valid. Would you like to open a browser window\nto the Google search engine?");
         QString caption = i18n("Invalid URL");
-        if (KMessageBox::warningYesNo(0, message, caption, KGuiItem(i18n("Browse Google")),
+        if (KMessageBox::warningYesNo(nullptr, message, caption, KGuiItem(i18n("Browse Google")),
                                       KGuiItem(i18n("Do Not Browse"))) == KMessageBox::Yes)
         {
             QDesktopServices::openUrl(QUrl("http://www.google.com"));
         }
     }
 }
 
 void AddLinkDialog::changeDefaultDescription(bool imageEnabled)
 {
     if (imageEnabled)
         ald->DescBox->setText(i18n("Show image of ") + ObjectName);
     else
         ald->DescBox->setText(i18n("Show webpage about ") + ObjectName);
 }
diff --git a/kstars/dialogs/addlinkdialog.h b/kstars/dialogs/addlinkdialog.h
index 85ff82b8a..7b3290296 100644
--- a/kstars/dialogs/addlinkdialog.h
+++ b/kstars/dialogs/addlinkdialog.h
@@ -1,109 +1,109 @@
 /***************************************************************************
                           addlinQDialog  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Oct 21 2001
     copyright            : (C) 2001 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef ADDLINKDIALOG_H_
 #define ADDLINKDIALOG_H_
 
 #include <QVBoxLayout>
 #include <QDialog>
 #include <klineedit.h>
 #include <KLocalizedString>
 
 #include "ui_addlinkdialog.h"
 
 class QString;
 
 class AddLinkDialogUI : public QFrame, public Ui::AddLinkDialog
 {
     Q_OBJECT
   public:
-    explicit AddLinkDialogUI(QWidget *parent = 0);
+    explicit AddLinkDialogUI(QWidget *parent = nullptr);
 };
 
 /**
   *@class AddLinkDialog
   *  AddLinkDialog is a simple dialog for adding a custom URL to a popup menu.
   *@author Jason Harris
   *@version 1.0
   */
 class AddLinkDialog : public QDialog
 {
     Q_OBJECT
   public:
     /**
           *Constructor.
         	*/
-    explicit AddLinkDialog(QWidget *parent = 0, const QString &oname = i18n("object"));
+    explicit AddLinkDialog(QWidget *parent = nullptr, const QString &oname = i18n("object"));
 
     /**
           *Destructor (empty)
         	*/
     ~AddLinkDialog() override {}
 
     /**
           *@return QString of the entered URL
         	*/
     QString url() const { return ald->URLBox->text(); }
 
     /**
           *@short Set the URL text
         	*@param s the new URL text
         	*/
     void setURL(const QString &s) { ald->URLBox->setText(s); }
 
     /**
           *@return QString of the entered menu entry text
         	*/
     QString desc() const { return ald->DescBox->text(); }
 
     /**
           *@short Set the Description text
         	*@param s the new description text
         	*/
     void setDesc(const QString &s) { ald->DescBox->setText(s); }
 
     /**
           *@return true if user declared the link is an image
         	*/
     bool isImageLink() const { return ald->ImageRadio->isChecked(); }
 
     /**
           *@short Set the link type
         	*@param b if true, link is an image link.
         	*/
     void setImageLink(bool b) { ald->ImageRadio->setChecked(b); }
 
   private slots:
     /**
           *Open the entered URL in the web browser
         	*/
     void checkURL(void);
 
     /**
           *We provide a default menu text string; this function changes the
         	*default string if the link type (image/webpage) is changed.  Note
         	*that if the user has changed the menu text, this function does nothing.
             *@param imageEnabled if true, show image string; otherwise show webpage string.
         	*/
     void changeDefaultDescription(bool imageEnabled);
 
   private:
     QString ObjectName;
     AddLinkDialogUI *ald;
 };
 
 #endif
diff --git a/kstars/dialogs/detaildialog.cpp b/kstars/dialogs/detaildialog.cpp
index 2018eba7d..851d879f8 100644
--- a/kstars/dialogs/detaildialog.cpp
+++ b/kstars/dialogs/detaildialog.cpp
@@ -1,1335 +1,1335 @@
 /***************************************************************************
                           detaildialog.cpp  -  description
                              -------------------
     begin                : Sun May 5 2002
     copyright            : (C) 2002 by Jason Harris and Jasem Mutlaq
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "detaildialog.h"
 
 #include "config-kstars.h"
 
 #include "addlinkdialog.h"
 #include "kspaths.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "ksutils.h"
 #include "observinglist.h"
 #include "skymap.h"
 #include "thumbnailpicker.h"
 #include "skycomponents/constellationboundarylines.h"
 #include "skycomponents/skymapcomposite.h"
 #include "skyobjects/deepskyobject.h"
 #include "skyobjects/ksasteroid.h"
 #include "skyobjects/kscomet.h"
 #include "skyobjects/ksmoon.h"
 #include "skyobjects/starobject.h"
 #include "skyobjects/supernova.h"
 #include "skycomponents/catalogcomponent.h"
 
 #ifdef HAVE_INDI
 #include <basedevice.h>
 #include "indi/indilistener.h"
 #endif
 
 #include <KToolInvocation>
 
 #include <QDesktopServices>
 
 DetailDialog::DetailDialog(SkyObject *o, const KStarsDateTime &ut, GeoLocation *geo, QWidget *parent)
-    : KPageDialog(parent), selectedObject(o), Data(0), DataComet(0), Pos(0), Links(0), Adv(0), Log(0)
+    : KPageDialog(parent), selectedObject(o), Data(nullptr), DataComet(nullptr), Pos(nullptr), Links(nullptr), Adv(nullptr), Log(nullptr)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     setFaceType(Tabbed);
     setBackgroundRole(QPalette::Base);
 
     titlePalette = palette();
     titlePalette.setColor(backgroundRole(), palette().color(QPalette::Active, QPalette::Highlight));
     titlePalette.setColor(foregroundRole(), palette().color(QPalette::Active, QPalette::HighlightedText));
 
     //Create thumbnail image
     Thumbnail.reset(new QPixmap(200, 200));
 
     setWindowTitle(i18n("Object Details"));
 
     // JM 2016-11-22: Do we really need a close button?
     //setStandardButtons(QDialogButtonBox::Close);
     setStandardButtons(QDialogButtonBox::NoButton);
 
     createGeneralTab();
     createPositionTab(ut, geo);
     createLinksTab();
     createAdvancedTab();
     createLogTab();
 }
 
 DetailDialog::~DetailDialog()
 {
 }
 
 void DetailDialog::createGeneralTab()
 {
     Data = new DataWidget(this);
     addPage(Data, i18n("General"));
 
     Data->Names->setPalette(titlePalette);
 
     //Connections
     connect(Data->ObsListButton, SIGNAL(clicked()), this, SLOT(addToObservingList()));
     connect(Data->CenterButton, SIGNAL(clicked()), this, SLOT(centerMap()));
 #ifdef HAVE_INDI
     connect(Data->ScopeButton, SIGNAL(clicked()), this, SLOT(centerTelescope()));
 #else
     Data->ScopeButton->setEnabled(false);
 #endif
     connect(Data->Image, SIGNAL(clicked()), this, SLOT(updateThumbnail()));
 
     // Stuff that should be visible only for specific types of objects
     Data->IllumLabel->setVisible(false); // Only shown for the moon
     Data->Illumination->setVisible(false);
 
     Data->BVIndex->setVisible(false); // Only shown for stars
     Data->BVLabel->setVisible(false);
 
     //Show object thumbnail image
     showThumbnail();
 
     //Fill in the data fields
     //Contents depend on type of object
     QString objecttyp, str;
 
     switch (selectedObject->type())
     {
         case SkyObject::STAR:
         {
             StarObject *s = (StarObject *)selectedObject;
 
             if (s->getHDIndex())
             {
                 Data->Names->setText(QString("%1, HD %2").arg(s->longname()).arg(s->getHDIndex()));
             }
             else
             {
                 Data->Names->setText(s->longname());
             }
 
             objecttyp = s->sptype() + ' ' + i18n("star");
             Data->Magnitude->setText(i18nc("number in magnitudes", "%1 mag",
                                            QLocale().toString(s->mag(), 'f', 2))); //show to hundredth place
 
             Data->BVLabel->setVisible(true);
             Data->BVIndex->setVisible(true);
             if (s->getBVIndex() < 30.)
             {
                 Data->BVIndex->setText(QString::number(s->getBVIndex(), 'f', 2));
             }
 
             //The thumbnail image is empty, and isn't clickable for stars
             //Also, don't show the border around the Image QFrame.
             Data->Image->setFrameStyle(QFrame::NoFrame);
             disconnect(Data->Image, SIGNAL(clicked()), this, SLOT(updateThumbnail()));
 
             //distance
             if (s->distance() > 2000. || s->distance() < 0.) // parallax < 0.5 mas
             {
                 Data->Distance->setText(QString(i18nc("larger than 2000 parsecs", "> 2000 pc")));
             }
             else if (s->distance() > 50.) //show to nearest integer
             {
                 Data->Distance->setText(i18nc("number in parsecs", "%1 pc", QLocale().toString(s->distance(), 'f', 0)));
             }
             else if (s->distance() > 10.0) //show to tenths place
             {
                 Data->Distance->setText(i18nc("number in parsecs", "%1 pc", QLocale().toString(s->distance(), 'f', 1)));
             }
             else //show to hundredths place
             {
                 Data->Distance->setText(i18nc("number in parsecs", "%1 pc", QLocale().toString(s->distance(), 'f', 2)));
             }
 
             //Note multiplicity/variablility in angular size label
             Data->AngSizeLabel->setText(QString());
             Data->AngSize->setText(QString());
             Data->AngSizeLabel->setFont(Data->AngSize->font());
             if (s->isMultiple() && s->isVariable())
             {
                 Data->AngSizeLabel->setText(i18nc("the star is a multiple star", "multiple") + ',');
                 Data->AngSize->setText(i18nc("the star is a variable star", "variable"));
             }
             else if (s->isMultiple())
             {
                 Data->AngSizeLabel->setText(i18nc("the star is a multiple star", "multiple"));
             }
             else if (s->isVariable())
             {
                 Data->AngSizeLabel->setText(i18nc("the star is a variable star", "variable"));
             }
 
             break; //end of stars case
         }
         case SkyObject::ASTEROID: //[fall through to planets]
         case SkyObject::COMET:    //[fall through to planets]
         case SkyObject::MOON:     //[fall through to planets]
         case SkyObject::PLANET:
         {
             KSPlanetBase *ps = (KSPlanetBase *)selectedObject;
 
             Data->Names->setText(ps->longname());
 
             //Type is "G5 star" for Sun
             if (ps->name() == "Sun")
             {
                 objecttyp = i18n("G5 star");
             }
             else if (ps->name() == "Moon")
             {
                 objecttyp = ps->translatedName();
             }
             else if (ps->name() == i18n("Pluto") || ps->name() == "Ceres" ||
                      ps->name() == "Eris") // TODO: Check if Ceres / Eris have translations and i18n() them
             {
                 objecttyp = i18n("Dwarf planet");
             }
             else
             {
                 objecttyp = ps->typeName();
             }
 
             //The moon displays illumination fraction and updateMag is called to calculate moon's current magnitude
             if (selectedObject->name() == "Moon")
             {
                 Data->IllumLabel->setVisible(true);
                 Data->Illumination->setVisible(true);
                 Data->Illumination->setText(
                     QString("%1 %").arg(QLocale().toString(((KSMoon *)selectedObject)->illum() * 100., 'f', 0)));
                 ((KSMoon *)selectedObject)->updateMag();
             }
 
             // JM: Shouldn't we use the calculated magnitude? Disabling the following
             /*
             if(selectedObject->type() == SkyObject::COMET){
                 Data->Magnitude->setText(i18nc("number in magnitudes", "%1 mag",
                                          QLocale().toString( ((KSComet *)selectedObject)->getTotalMagnitudeParameter(), 'f', 2)));  //show to hundredth place
 
             }
             else{*/
             Data->Magnitude->setText(i18nc("number in magnitudes", "%1 mag",
                                            QLocale().toString(ps->mag(), 'f', 2))); //show to hundredth place
             //}
 
             //Distance from Earth.  The moon requires a unit conversion
             if (ps->name() == "Moon")
             {
                 Data->Distance->setText(
                     i18nc("distance in kilometers", "%1 km", QLocale().toString(ps->rearth() * AU_KM, 'f', 2)));
             }
             else
             {
                 Data->Distance->setText(
                     i18nc("distance in Astronomical Units", "%1 AU", QLocale().toString(ps->rearth(), 'f', 3)));
             }
 
             //Angular size; moon and sun in arcmin, others in arcsec
             if (ps->angSize())
             {
                 if (ps->name() == "Sun" || ps->name() == "Moon")
                 {
                     Data->AngSize->setText(i18nc(
                         "angular size in arcminutes", "%1 arcmin",
                         QLocale().toString(
                             ps->angSize(), 'f',
                             1))); // Needn't be a plural form because sun / moon will never contract to 1 arcminute
                 }
                 else
                 {
                     Data->AngSize->setText(i18nc("angular size in arcseconds", "%1 arcsec",
                                                  QLocale().toString(ps->angSize() * 60.0, 'f', 1)));
                 }
             }
             else
             {
                 Data->AngSize->setText("--");
             }
 
             break; //end of planets/comets/asteroids case
         }
         case SkyObject::SUPERNOVA:
         {
             Supernova *sup = (Supernova *)selectedObject;
 
             objecttyp = i18n("Supernova");
             Data->Names->setText(sup->name());
             if (sup->mag() < 99)
                 Data->Magnitude->setText(
                     i18nc("number in magnitudes", "%1 mag", QLocale().toString(sup->mag(), 'f', 2)));
             else
                 Data->Magnitude->setText("--");
 
             Data->DistanceLabel->setVisible(false);
             Data->Distance->setVisible(false);
 
             Data->AngSizeLabel->setVisible(false);
             Data->AngSize->setVisible(false);
 
             QLabel *discoveryDateLabel = new QLabel(i18n("Discovery Date:"), this);
             QLabel *discoveryDate      = new QLabel(sup->getDate(), this);
             Data->dataGridLayout->addWidget(discoveryDateLabel, 1, 0);
             Data->dataGridLayout->addWidget(discoveryDate, 1, 1);
 
             QLabel *typeLabel = new QLabel(i18n("Type:"), this);
             QLabel *type      = new QLabel(sup->getType(), this);
             Data->dataGridLayout->addWidget(typeLabel, 2, 0);
             Data->dataGridLayout->addWidget(type, 2, 1);
 
             QLabel *hostGalaxyLabel = new QLabel(i18n("Host Galaxy:"), this);
             QLabel *hostGalaxy      = new QLabel(sup->getHostGalaxy().isEmpty() ? "--" : sup->getHostGalaxy(), this);
             Data->dataGridLayout->addWidget(hostGalaxyLabel, 3, 0);
             Data->dataGridLayout->addWidget(hostGalaxy, 3, 1);
 
             QLabel *redShiftLabel = new QLabel(i18n("Red Shift:"), this);
             QLabel *redShift      = new QLabel(
                 (sup->getRedShift() < 99) ? QString::number(sup->getRedShift(), 'f', 2) : QString("--"), this);
             Data->dataGridLayout->addWidget(redShiftLabel, 4, 0);
             Data->dataGridLayout->addWidget(redShift, 4, 1);
 
             break;
         }
         default: //deep-sky objects
         {
             DeepSkyObject *dso = (DeepSkyObject *)selectedObject;
 
             //Show all names recorded for the object
             QStringList nameList;
             if (!dso->longname().isEmpty() && dso->longname() != dso->name())
             {
                 nameList.append(dso->translatedLongName());
                 nameList.append(dso->translatedName());
             }
             else
             {
                 nameList.append(dso->translatedName());
             }
 
             if (!dso->translatedName2().isEmpty())
             {
                 nameList.append(dso->translatedName2());
             }
 
             if (dso->ugc() != 0)
             {
                 nameList.append(QString("UGC %1").arg(dso->ugc()));
             }
 
             if (dso->pgc() != 0)
             {
                 nameList.append(QString("PGC %1").arg(dso->pgc()));
             }
 
             Data->Names->setText(nameList.join(","));
 
             objecttyp = dso->typeName();
 
             if (dso->type() == SkyObject::RADIO_SOURCE)
             {
                 Q_ASSERT(dso->customCatalog()); // the in-built catalogs don't have radio sources
                 Data->MagLabel->setText(
                     i18nc("integrated flux at a frequency", "Flux(%1):", dso->customCatalog()->fluxFrequency()));
                 Data->Magnitude->setText(i18nc("integrated flux value", "%1 %2",
                                                QLocale().toString(dso->flux(), 'f', 1),
                                                dso->customCatalog()->fluxUnit())); //show to tenths place
             }
             else if (dso->mag() > 90.0)
             {
                 Data->Magnitude->setText("--");
             }
             else
             {
                 Data->Magnitude->setText(i18nc("number in magnitudes", "%1 mag",
                                                QLocale().toString(dso->mag(), 'f', 1))); //show to tenths place
             }
 
             //No distances at this point...
             Data->Distance->setText("--");
 
             //Only show decimal place for small angular sizes
             if (dso->a() > 10.0)
             {
                 Data->AngSize->setText(
                     i18nc("angular size in arcminutes", "%1 arcmin", QLocale().toString(dso->a(), 'f', 0)));
             }
             else if (dso->a())
             {
                 Data->AngSize->setText(
                     i18nc("angular size in arcminutes", "%1 arcmin", QLocale().toString(dso->a(), 'f', 1)));
             }
             else
             {
                 Data->AngSize->setText("--");
             }
 
             break;
         }
     }
 
     // Add specifics data
     switch (selectedObject->type())
     {
         case SkyObject::ASTEROID:
         {
             KSAsteroid *ast = (KSAsteroid *)selectedObject;
             DataComet       = new DataCometWidget(this); // Show same specifics data as comets
             Data->IncludeData->layout()->addWidget(DataComet);
 
             // Perihelion
             str.setNum(ast->getPerihelion());
             DataComet->Perihelion->setText(str + " AU");
             // Earth MOID
             if (ast->getEarthMOID() == 0)
                 str = "";
             else
                 str.setNum(ast->getEarthMOID()).append(" AU");
             DataComet->EarthMOID->setText(str);
             // Orbit ID
             DataComet->OrbitID->setText(ast->getOrbitID());
             // Orbit Class
             DataComet->OrbitClass->setText(ast->getOrbitClass());
             // NEO
             if (ast->isNEO())
                 DataComet->NEO->setText("Yes");
             else
                 DataComet->NEO->setText("No");
             // Albedo
             if (ast->getAlbedo() == 0.0)
                 str = "";
             else
                 str.setNum(ast->getAlbedo());
             DataComet->Albedo->setText(str);
             // Diameter
             if (ast->getDiameter() == 0.0)
                 str = "";
             else
                 str.setNum(ast->getDiameter()).append(" km");
             DataComet->Diameter->setText(str);
             // Dimensions
             if (ast->getDimensions().isEmpty())
                 DataComet->Dimensions->setText("");
             else
                 DataComet->Dimensions->setText(ast->getDimensions() + " km");
             // Rotation period
             if (ast->getRotationPeriod() == 0.0)
                 str = "";
             else
                 str.setNum(ast->getRotationPeriod()).append(" h");
             DataComet->Rotation->setText(str);
             // Period
             if (ast->getPeriod() == 0.0)
                 str = "";
             else
                 str.setNum(ast->getPeriod()).append(" y");
             DataComet->Period->setText(str);
 
             break;
         }
         case SkyObject::COMET:
         {
             KSComet *com = (KSComet *)selectedObject;
             DataComet    = new DataCometWidget(this);
             Data->IncludeData->layout()->addWidget(DataComet);
 
             // Perihelion
             str.setNum(com->getPerihelion());
             DataComet->Perihelion->setText(str + " AU");
             // Earth MOID
             if (com->getEarthMOID() == 0)
                 str = "";
             else
                 str.setNum(com->getEarthMOID()).append(" AU");
             DataComet->EarthMOID->setText(str);
             // Orbit ID
             DataComet->OrbitID->setText(com->getOrbitID());
             // Orbit Class
             DataComet->OrbitClass->setText(com->getOrbitClass());
             // NEO
             if (com->isNEO())
                 DataComet->NEO->setText("Yes");
             else
                 DataComet->NEO->setText("No");
             // Albedo
             if (com->getAlbedo() == 0.0)
                 str = "";
             else
                 str.setNum(com->getAlbedo());
             DataComet->Albedo->setText(str);
             // Diameter
             if (com->getDiameter() == 0.0)
                 str = "";
             else
                 str.setNum(com->getDiameter()).append(" km");
             DataComet->Diameter->setText(str);
             // Dimensions
             if (com->getDimensions().isEmpty())
                 DataComet->Dimensions->setText("");
             else
                 DataComet->Dimensions->setText(com->getDimensions() + " km");
             // Rotation period
             if (com->getRotationPeriod() == 0.0)
                 str = "";
             else
                 str.setNum(com->getRotationPeriod()).append(" h");
             DataComet->Rotation->setText(str);
             // Period
             if (com->getPeriod() == 0.0)
                 str = "";
             else
                 str.setNum(com->getPeriod()).append(" y");
             DataComet->Period->setText(str);
 
             break;
         }
     }
 
     //Common to all types:
     QString cname = KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(selectedObject);
     if (selectedObject->type() != SkyObject::CONSTELLATION)
     {
         cname = i18nc("%1 type of sky object (planet, asteroid etc), %2 name of a constellation", "%1 in %2", objecttyp,
                       cname);
     }
     Data->ObjectTypeInConstellation->setText(cname);
 }
 
 void DetailDialog::createPositionTab(const KStarsDateTime &ut, GeoLocation *geo)
 {
     Pos = new PositionWidget(this);
     addPage(Pos, i18n("Position"));
 
     Pos->CoordTitle->setPalette(titlePalette);
     Pos->RSTTitle->setPalette(titlePalette);
     KStarsData *data = KStarsData::Instance();
 
     //Coordinates Section:
     //Don't use KLocale::formatNumber() for the epoch string,
     //because we don't want a thousands-place separator!
     selectedObject->updateCoords(data->updateNum(), true, data->geo()->lat(), data->lst(), false);
     QString sEpoch = QString::number(KStarsDateTime::jdToEpoch(selectedObject->getLastPrecessJD()), 'f', 1);
     //Replace the decimal point with localized decimal symbol
     sEpoch.replace('.', QLocale().decimalPoint()); // Is this necessary? -- asimha Oct 2016
 
     qDebug() << (selectedObject->deprecess(data->updateNum())).ra0().toHMSString()
              << (selectedObject->deprecess(data->updateNum())).dec0().toDMSString() << endl;
     //qDebug() << selectedObject->ra().toHMSString() << selectedObject->dec().toDMSString() << endl;
     Pos->RALabel->setText(i18n("RA (%1):", sEpoch));
     Pos->DecLabel->setText(i18n("DE (%1):", sEpoch));
     Pos->RA->setText(selectedObject->ra().toHMSString());
     Pos->Dec->setText(selectedObject->dec().toDMSString());
 
     selectedObject->EquatorialToHorizontal(data->lst(), data->geo()->lat());
 
     Pos->Az->setText(selectedObject->az().toDMSString());
     dms a;
 
     if (Options::useAltAz())
         a = selectedObject->alt();
     else
         a = selectedObject->altRefracted();
     Pos->Alt->setText(a.toDMSString());
 
     // Display the RA0 and Dec0 for objects that are outside the solar system
     if (!selectedObject->isSolarSystem())
     {
         Pos->RA0->setText(selectedObject->ra0().toHMSString());
         Pos->Dec0->setText(selectedObject->dec0().toDMSString());
     }
     else
     {
         Pos->RA0->setText("--");
         Pos->Dec0->setText("--");
     }
 
     //Hour Angle can be negative, but dms HMS expressions cannot.
     //Here's a kludgy workaround:
     dms lst = geo->GSTtoLST(ut.gst());
     dms ha(lst.Degrees() - selectedObject->ra().Degrees());
     QChar sgn('+');
     if (ha.Hours() > 12.0)
     {
         ha.setH(24.0 - ha.Hours());
         sgn = '-';
     }
     Pos->HA->setText(QString("%1%2").arg(sgn).arg(ha.toHMSString()));
 
     //Airmass is approximated as the secant of the zenith distance,
     //equivalent to 1./sin(Alt).  Beware of Inf at Alt=0!
     if (selectedObject->alt().Degrees() > 0.0)
         Pos->Airmass->setText(QLocale().toString(selectedObject->airmass(), 'f', 2));
     else
         Pos->Airmass->setText("--");
 
     //Rise/Set/Transit Section:
 
     //Prepare time/position variables
     QTime rt = selectedObject->riseSetTime(ut, geo, true);   //true = use rise time
     dms raz  = selectedObject->riseSetTimeAz(ut, geo, true); //true = use rise time
 
     //If transit time is before rise time, use transit time for tomorrow
     QTime tt = selectedObject->transitTime(ut, geo);
     dms talt = selectedObject->transitAltitude(ut, geo);
     if (tt < rt)
     {
         tt   = selectedObject->transitTime(ut.addDays(1), geo);
         talt = selectedObject->transitAltitude(ut.addDays(1), geo);
     }
 
     //If set time is before rise time, use set time for tomorrow
     QTime st = selectedObject->riseSetTime(ut, geo, false);   //false = use set time
     dms saz  = selectedObject->riseSetTimeAz(ut, geo, false); //false = use set time
     if (st < rt)
     {
         st  = selectedObject->riseSetTime(ut.addDays(1), geo, false);   //false = use set time
         saz = selectedObject->riseSetTimeAz(ut.addDays(1), geo, false); //false = use set time
     }
 
     if (rt.isValid())
     {
         Pos->TimeRise->setText(QString().sprintf("%02d:%02d", rt.hour(), rt.minute()));
         Pos->TimeSet->setText(QString().sprintf("%02d:%02d", st.hour(), st.minute()));
         Pos->AzRise->setText(raz.toDMSString());
         Pos->AzSet->setText(saz.toDMSString());
     }
     else
     {
         if (selectedObject->alt().Degrees() > 0.0)
         {
             Pos->TimeRise->setText(i18n("Circumpolar"));
             Pos->TimeSet->setText(i18n("Circumpolar"));
         }
         else
         {
             Pos->TimeRise->setText(i18n("Never rises"));
             Pos->TimeSet->setText(i18n("Never rises"));
         }
 
         Pos->AzRise->setText(i18nc("Not Applicable", "N/A"));
         Pos->AzSet->setText(i18nc("Not Applicable", "N/A"));
     }
 
     Pos->TimeTransit->setText(QString().sprintf("%02d:%02d", tt.hour(), tt.minute()));
     Pos->AltTransit->setText(talt.toDMSString());
 
     // Restore the position and other time-dependent parameters
     selectedObject->recomputeCoords(ut, geo);
 }
 
 void DetailDialog::createLinksTab()
 {
     // don't create a link tab for an unnamed star
     if (selectedObject->name() == QString("star"))
         return;
 
     Links = new LinksWidget(this);
     addPage(Links, i18n("Links"));
 
     Links->InfoTitle->setPalette(titlePalette);
     Links->ImagesTitle->setPalette(titlePalette);
 
     foreach (const QString &s, selectedObject->InfoTitle())
         Links->InfoTitleList->addItem(i18nc("Image/info menu item (should be translated)", s.toLocal8Bit()));
 
     //Links->InfoTitleList->setCurrentRow(0);
 
     foreach (const QString &s, selectedObject->ImageTitle())
         Links->ImageTitleList->addItem(i18nc("Image/info menu item (should be translated)", s.toLocal8Bit()));
 
     // Signals/Slots
     connect(Links->ViewButton, SIGNAL(clicked()), this, SLOT(viewLink()));
     connect(Links->AddLinkButton, SIGNAL(clicked()), this, SLOT(addLink()));
     connect(Links->EditLinkButton, SIGNAL(clicked()), this, SLOT(editLinkDialog()));
     connect(Links->RemoveLinkButton, SIGNAL(clicked()), this, SLOT(removeLinkDialog()));
 
     // When an item is selected in info list, selected items are cleared image list.
     connect(Links->InfoTitleList, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)), this,
             SLOT(setCurrentLink(QListWidgetItem*)));
     connect(Links->InfoTitleList, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),
             Links->ImageTitleList, SLOT(clearSelection()));
 
     // vice versa
     connect(Links->ImageTitleList, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)), this,
             SLOT(setCurrentLink(QListWidgetItem*)));
     connect(Links->ImageTitleList, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),
             Links->InfoTitleList, SLOT(clearSelection()));
 
     connect(Links->InfoTitleList, SIGNAL(itemDoubleClicked(QListWidgetItem*)), this, SLOT(viewLink()));
     connect(Links->ImageTitleList, SIGNAL(itemDoubleClicked(QListWidgetItem*)), this, SLOT(viewLink()));
 
     connect(Links->InfoTitleList, SIGNAL(itemSelectionChanged()), this, SLOT(updateButtons()));
     connect(Links->ImageTitleList, SIGNAL(itemSelectionChanged()), this, SLOT(updateButtons()));
 
     updateLists();
 }
 
 void DetailDialog::addLink()
 {
     if (!selectedObject)
         return;
     QPointer<AddLinkDialog> adialog = new AddLinkDialog(this, selectedObject->name());
     QString entry;
     QFile file;
 
     if (adialog->exec() == QDialog::Accepted)
     {
         if (adialog->isImageLink())
         {
             //Add link to object's ImageList, and descriptive text to its ImageTitle list
             selectedObject->ImageList().append(adialog->url());
             selectedObject->ImageTitle().append(adialog->desc());
 
             //Also, update the user's custom image links database
             //check for user's image-links database.  If it doesn't exist, create it.
             file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) +
                              "image_url.dat"); //determine filename in local user KDE directory tree.
 
             if (!file.open(QIODevice::ReadWrite | QIODevice::Append))
             {
                 QString message =
                     i18n("Custom image-links file could not be opened.\nLink cannot be recorded for future sessions.");
-                KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+                KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
                 delete adialog;
                 return;
             }
             else
             {
                 entry = selectedObject->name() + ':' + adialog->desc() + ':' + adialog->url();
                 QTextStream stream(&file);
                 stream << entry << endl;
                 file.close();
                 updateLists();
             }
         }
         else
         {
             selectedObject->InfoList().append(adialog->url());
             selectedObject->InfoTitle().append(adialog->desc());
 
             //check for user's image-links database.  If it doesn't exist, create it.
             file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) +
                              "info_url.dat"); //determine filename in local user KDE directory tree.
 
             if (!file.open(QIODevice::ReadWrite | QIODevice::Append))
             {
                 QString message = i18n(
                     "Custom information-links file could not be opened.\nLink cannot be recorded for future sessions.");
-                KMessageBox::sorry(0, message, i18n("Could not Open File"));
+                KMessageBox::sorry(nullptr, message, i18n("Could not Open File"));
                 delete adialog;
                 return;
             }
             else
             {
                 entry = selectedObject->name() + ':' + adialog->desc() + ':' + adialog->url();
                 QTextStream stream(&file);
                 stream << entry << endl;
                 file.close();
                 updateLists();
             }
         }
     }
     delete adialog;
 }
 
 void DetailDialog::createAdvancedTab()
 {
     // Don't create an adv tab for an unnamed star or if advinterface file failed loading
     // We also don't need adv dialog for solar system objects.
     if (selectedObject->name() == QString("star") || KStarsData::Instance()->avdTree().isEmpty() ||
         selectedObject->type() == SkyObject::PLANET || selectedObject->type() == SkyObject::COMET ||
         selectedObject->type() == SkyObject::ASTEROID)
         return;
 
     Adv = new DatabaseWidget(this);
     addPage(Adv, i18n("Advanced"));
 
     connect(Adv->ADVTree, SIGNAL(itemDoubleClicked(QTreeWidgetItem*,int)), this, SLOT(viewADVData()));
 
     populateADVTree();
 }
 
 void DetailDialog::createLogTab()
 {
     //Don't create a log tab for an unnamed star
     if (selectedObject->name() == QString("star"))
         return;
 
     // Log Tab
     Log = new LogWidget(this);
     addPage(Log, i18n("Log"));
 
     Log->LogTitle->setPalette(titlePalette);
 
     if (selectedObject->userLog().isEmpty())
         Log->UserLog->setText(
             i18n("Record here observation logs and/or data on %1.", selectedObject->translatedName()));
     else
         Log->UserLog->setText(selectedObject->userLog());
 
     //Automatically save the log contents when the widget loses focus
     connect(Log->UserLog, SIGNAL(focusOut()), this, SLOT(saveLogData()));
 }
 
 void DetailDialog::setCurrentLink(QListWidgetItem *it)
 {
     m_CurrentLink = it;
 }
 
 void DetailDialog::viewLink()
 {
     QString URL;
 
     if (m_CurrentLink == nullptr)
         return;
 
     if (m_CurrentLink->listWidget() == Links->InfoTitleList)
     {
         URL = QString(selectedObject->InfoList().at(Links->InfoTitleList->row(m_CurrentLink)));
     }
     else if (m_CurrentLink->listWidget() == Links->ImageTitleList)
     {
         URL = QString(selectedObject->ImageList().at(Links->ImageTitleList->row(m_CurrentLink)));
     }
 
     if (!URL.isEmpty())
         QDesktopServices::openUrl(QUrl(URL));
 }
 
 void DetailDialog::updateLists()
 {
     Links->InfoTitleList->clear();
     Links->ImageTitleList->clear();
 
     foreach (const QString &s, selectedObject->InfoTitle())
         Links->InfoTitleList->addItem(s);
 
     foreach (const QString &s, selectedObject->ImageTitle())
         Links->ImageTitleList->addItem(s);
 
     updateButtons();
 }
 
 void DetailDialog::updateButtons()
 {
     bool anyLink = false;
     if (!Links->InfoTitleList->selectedItems().isEmpty() || !Links->ImageTitleList->selectedItems().isEmpty())
         anyLink = true;
 
     // Buttons could be disabled if lists are initially empty, we enable and disable them here
     // depending on the current status of the list.
     Links->ViewButton->setEnabled(anyLink);
     Links->EditLinkButton->setEnabled(anyLink);
     Links->RemoveLinkButton->setEnabled(anyLink);
 }
 
 void DetailDialog::editLinkDialog()
 {
     int type = 0, row = 0;
     QString search_line, replace_line, currentItemTitle, currentItemURL;
 
     if (m_CurrentLink == nullptr)
         return;
 
     QDialog editDialog(this);
     editDialog.setWindowTitle(i18n("Edit Link"));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
 
     QFrame editFrame(&editDialog);
 
     mainLayout->addWidget(&editFrame);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), &editDialog, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), &editDialog, SLOT(reject()));
 
     editDialog.setLayout(mainLayout);
 
     if (m_CurrentLink->listWidget() == Links->InfoTitleList)
     {
         row = Links->InfoTitleList->row(m_CurrentLink);
 
         currentItemTitle = m_CurrentLink->text();
         currentItemURL   = selectedObject->InfoList().at(row);
         search_line      = selectedObject->name();
         search_line += ':';
         search_line += currentItemTitle;
         search_line += ':';
         search_line += currentItemURL;
         type = 0;
     }
     else if (m_CurrentLink->listWidget() == Links->ImageTitleList)
     {
         row = Links->ImageTitleList->row(m_CurrentLink);
 
         currentItemTitle = m_CurrentLink->text();
         currentItemURL   = selectedObject->ImageList().at(row);
         search_line      = selectedObject->name();
         search_line += ':';
         search_line += currentItemTitle;
         search_line += ':';
         search_line += currentItemURL;
         type = 1;
     }
     else
         return;
 
     QLineEdit editNameField(&editFrame);
     editNameField.setObjectName("nameedit");
     editNameField.home(false);
     editNameField.setText(currentItemTitle);
     QLabel editLinkURL(i18n("URL:"), &editFrame);
     QLineEdit editLinkField(&editFrame);
     editLinkField.setObjectName("urledit");
     editLinkField.home(false);
     editLinkField.setText(currentItemURL);
     QVBoxLayout vlay(&editFrame);
     vlay.setObjectName("vlay");
     QHBoxLayout editLinkLayout(&editFrame);
     editLinkLayout.setObjectName("editlinklayout");
     editLinkLayout.addWidget(&editLinkURL);
     editLinkLayout.addWidget(&editLinkField);
     vlay.addWidget(&editNameField);
     vlay.addLayout(&editLinkLayout);
 
     bool go(true);
     // If user presses cancel then skip the action
     if (editDialog.exec() != QDialog::Accepted)
         go = false;
 
     // If nothing changed, skip th action
     if (editLinkField.text() == currentItemURL && editNameField.text() == currentItemTitle)
         go = false;
 
     if (go)
     {
         replace_line = selectedObject->name() + ':' + editNameField.text() + ':' + editLinkField.text();
 
         // Info Link
         if (type == 0)
         {
             selectedObject->InfoTitle().replace(row, editNameField.text());
             selectedObject->InfoList().replace(row, editLinkField.text());
 
             // Image Links
         }
         else
         {
             selectedObject->ImageTitle().replace(row, editNameField.text());
             selectedObject->ImageList().replace(row, editLinkField.text());
         }
 
         // Update local files
         updateLocalDatabase(type, search_line, replace_line);
 
         // Set focus to the same item again
         if (type == 0)
             Links->InfoTitleList->setCurrentRow(row);
         else
             Links->ImageTitleList->setCurrentRow(row);
     }
 }
 
 void DetailDialog::removeLinkDialog()
 {
     int type = 0, row = 0;
     QString currentItemURL, currentItemTitle, LineEntry, TempFileName;
     QFile URLFile;
     QTemporaryFile TempFile;
 
     TempFile.setAutoRemove(false);
     TempFile.open();
     TempFileName = TempFile.fileName();
 
     if (m_CurrentLink == nullptr)
         return;
 
     if (m_CurrentLink->listWidget() == Links->InfoTitleList)
     {
         row              = Links->InfoTitleList->row(m_CurrentLink);
         currentItemTitle = m_CurrentLink->text();
         currentItemURL   = selectedObject->InfoList()[row];
         LineEntry        = selectedObject->name();
         LineEntry += ':';
         LineEntry += currentItemTitle;
         LineEntry += ':';
         LineEntry += currentItemURL;
         type = 0;
     }
     else if (m_CurrentLink->listWidget() == Links->ImageTitleList)
     {
         row              = Links->ImageTitleList->row(m_CurrentLink);
         currentItemTitle = m_CurrentLink->text();
         currentItemURL   = selectedObject->ImageList()[row];
         LineEntry        = selectedObject->name();
         LineEntry += ':';
         LineEntry += currentItemTitle;
         LineEntry += ':';
         LineEntry += currentItemURL;
         type = 1;
     }
     else
         return;
 
-    if (KMessageBox::warningContinueCancel(0, i18n("Are you sure you want to remove the %1 link?", currentItemTitle),
+    if (KMessageBox::warningContinueCancel(nullptr, i18n("Are you sure you want to remove the %1 link?", currentItemTitle),
                                            i18n("Delete Confirmation"),
                                            KStandardGuiItem::del()) != KMessageBox::Continue)
         return;
 
     if (type == 0)
     {
         selectedObject->InfoTitle().removeAt(row);
         selectedObject->InfoList().removeAt(row);
     }
     else
     {
         selectedObject->ImageTitle().removeAt(row);
         selectedObject->ImageList().removeAt(row);
     }
 
     // Remove link from file
     updateLocalDatabase(type, LineEntry);
 
     // Set focus to the 1st item in the list
     if (type == 0)
         Links->InfoTitleList->clearSelection();
     else
         Links->ImageTitleList->clearSelection();
 }
 
 void DetailDialog::updateLocalDatabase(int type, const QString &search_line, const QString &replace_line)
 {
     QString TempFileName, file_line;
     QFile URLFile;
     QTemporaryFile TempFile;
     TempFile.setAutoRemove(false);
     TempFile.open();
     QTextStream *temp_stream = nullptr;
     QTextStream *out_stream  = nullptr;
     bool replace             = !replace_line.isEmpty();
 
     if (search_line.isEmpty())
         return;
 
     TempFileName = TempFile.fileName();
 
     switch (type)
     {
         // Info Links
         case 0:
             // Get name for our local info_url file
             URLFile.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "info_url.dat");
             break;
 
         // Image Links
         case 1:
             // Get name for our local info_url file
             URLFile.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "image_url.dat");
             break;
     }
 
     // Copy URL file to temp file
     KIO::file_copy(QUrl::fromLocalFile(URLFile.fileName()), QUrl::fromLocalFile(TempFileName), -1,
                    KIO::Overwrite | KIO::HideProgressInfo);
 
     if (!URLFile.open(QIODevice::WriteOnly))
     {
         qDebug() << "DetailDialog: Failed to open " << URLFile.fileName();
         qDebug() << "KStars cannot save to user database";
         return;
     }
 
     // Get streams;
     temp_stream = new QTextStream(&TempFile);
     out_stream  = new QTextStream(&URLFile);
 
     while (!temp_stream->atEnd())
     {
         file_line = temp_stream->readLine();
         // If we find a match, either replace, or remove (by skipping).
         if (file_line == search_line)
         {
             if (replace)
                 (*out_stream) << replace_line << endl;
             else
                 continue;
         }
         else
             (*out_stream) << file_line << endl;
     }
 
     URLFile.close();
     delete (temp_stream);
     delete (out_stream);
 
     updateLists();
 }
 
 void DetailDialog::populateADVTree()
 {
     QTreeWidgetItem *parent = nullptr;
     QTreeWidgetItem *temp   = nullptr;
 
     // We populate the tree iterativley, keeping track of parents as we go
     // This solution is more efficient than the previous recursion algorithm.
     foreach (ADVTreeData *item, KStarsData::Instance()->avdTree())
     {
         switch (item->Type)
         {
             // Top Level
             case 0:
                 temp = new QTreeWidgetItem(parent, QStringList(item->Name));
                 if (parent == nullptr)
                     Adv->ADVTree->addTopLevelItem(temp);
                 parent = temp;
 
                 break;
 
             // End of top level
             case 1:
                 if (parent != nullptr)
                     parent = parent->parent();
                 break;
 
             // Leaf
             case 2:
                 new QTreeWidgetItem(parent, QStringList(item->Name));
                 break;
         }
     }
 }
 
 void DetailDialog::viewADVData()
 {
     QString link;
     QTreeWidgetItem *current = Adv->ADVTree->currentItem();
 
     //If the item has children or is invalid, do nothing
     if (!current || current->childCount() > 0)
         return;
 
     foreach (ADVTreeData *item, KStarsData::Instance()->avdTree())
     {
         if (item->Name == current->text(0))
         {
             link = item->Link;
             link = parseADVData(link);
             QDesktopServices::openUrl(QUrl(link));
             return;
         }
     }
 }
 
 QString DetailDialog::parseADVData(const QString &inlink)
 {
     QString link = inlink;
     QString subLink;
     int index;
 
     if ((index = link.indexOf("KSOBJ")) != -1)
     {
         link.remove(index, 5);
         link = link.insert(index, selectedObject->name());
     }
 
     if ((index = link.indexOf("KSRA")) != -1)
     {
         link.remove(index, 4);
         subLink.sprintf("%02d%02d%02d", selectedObject->ra0().hour(), selectedObject->ra0().minute(),
                         selectedObject->ra0().second());
         subLink = subLink.insert(2, "%20");
         subLink = subLink.insert(7, "%20");
 
         link = link.insert(index, subLink);
     }
     if ((index = link.indexOf("KSDEC")) != -1)
     {
         link.remove(index, 5);
         if (selectedObject->dec().degree() < 0)
         {
             subLink.sprintf("%03d%02d%02d", selectedObject->dec0().degree(), selectedObject->dec0().arcmin(),
                             selectedObject->dec0().arcsec());
             subLink = subLink.insert(3, "%20");
             subLink = subLink.insert(8, "%20");
         }
         else
         {
             subLink.sprintf("%02d%02d%02d", selectedObject->dec0().degree(), selectedObject->dec0().arcmin(),
                             selectedObject->dec0().arcsec());
             subLink = subLink.insert(0, "%2B");
             subLink = subLink.insert(5, "%20");
             subLink = subLink.insert(10, "%20");
         }
         link = link.insert(index, subLink);
     }
 
     return link;
 }
 
 void DetailDialog::saveLogData()
 {
     selectedObject->saveUserLog(Log->UserLog->toPlainText());
 }
 
 void DetailDialog::addToObservingList()
 {
     KStarsData::Instance()->observingList()->slotAddObject(selectedObject);
 }
 
 void DetailDialog::centerMap()
 {
     SkyMap::Instance()->setClickedObject(selectedObject);
     SkyMap::Instance()->slotCenter();
 }
 
 void DetailDialog::centerTelescope()
 {
 #ifdef HAVE_INDI
 
     if (INDIListener::Instance()->size() == 0)
     {
         KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
         return;
     }
 
     foreach (ISD::GDInterface *gd, INDIListener::Instance()->getDevices())
     {
         INDI::BaseDevice *bd = gd->getBaseDevice();
 
         if (gd->getType() != KSTARS_TELESCOPE)
             continue;
 
         if (bd == nullptr)
             continue;
 
         if (bd->isConnected() == false)
         {
             KMessageBox::error(0,
                                i18n("Telescope %1 is offline. Please connect and retry again.", gd->getDeviceName()));
             return;
         }
 
         ISD::GDSetCommand SlewCMD(INDI_SWITCH, "ON_COORD_SET", "TRACK", ISS_ON, this);
 
         gd->setProperty(&SlewCMD);
         gd->runCommand(INDI_SEND_COORDS, selectedObject);
 
         return;
     }
 
     KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
 
 #endif
 }
 
 void DetailDialog::showThumbnail()
 {
     //No image if object is a star
     if (selectedObject->type() == SkyObject::STAR || selectedObject->type() == SkyObject::CATALOG_STAR)
     {
         Thumbnail->scaled(Data->Image->width(), Data->Image->height());
         Thumbnail->fill(Data->DataFrame->palette().color(QPalette::Window));
         Data->Image->setPixmap(*Thumbnail);
         return;
     }
 
     //Try to load the object's image from disk
     //If no image found, load "no image" image
     QFile file;
     QString fname = "thumb-" + selectedObject->name().toLower().remove(' ') + ".png";
     if (KSUtils::openDataFile(file, fname))
     {
         file.close();
         Thumbnail->load(file.fileName(), "PNG");
     }
     else
         Thumbnail->load(":/images/noimage.png");
 
     *Thumbnail =
         Thumbnail->scaled(Data->Image->width(), Data->Image->height(), Qt::KeepAspectRatio, Qt::FastTransformation);
 
     Data->Image->setPixmap(*Thumbnail);
 }
 
 void DetailDialog::updateThumbnail()
 {
     QPointer<ThumbnailPicker> tp = new ThumbnailPicker(selectedObject, *Thumbnail, this);
 
     if (tp->exec() == QDialog::Accepted)
     {
         QString fname = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "thumb-" +
                         selectedObject->name().toLower().remove(' ') + ".png";
 
         Data->Image->setPixmap(*(tp->image()));
 
         //If a real image was set, save it.
         //If the image was unset, delete the old image on disk.
         if (tp->imageFound())
         {
             bool rc = Data->Image->pixmap()->save(fname, "PNG");
             if (rc == false)
             {
-                KMessageBox::error(0, i18n("Error: Unable to save image to %1", fname), i18n("Save Thumbnail"));
+                KMessageBox::error(nullptr, i18n("Error: Unable to save image to %1", fname), i18n("Save Thumbnail"));
             }
             else
                 *Thumbnail = *(Data->Image->pixmap());
         }
         else
         {
             QFile f;
             f.setFileName(fname);
             f.remove();
         }
     }
     delete tp;
 }
 
 DataWidget::DataWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
     DataFrame->setBackgroundRole(QPalette::Base);
 }
 
 DataCometWidget::DataCometWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 PositionWidget::PositionWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
     CoordFrame->setBackgroundRole(QPalette::Base);
     RSTFrame->setBackgroundRole(QPalette::Base);
 }
 
 LinksWidget::LinksWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 DatabaseWidget::DatabaseWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 LogWidget::LogWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
diff --git a/kstars/dialogs/detaildialog.h b/kstars/dialogs/detaildialog.h
index 09feba35d..c094557e5 100644
--- a/kstars/dialogs/detaildialog.h
+++ b/kstars/dialogs/detaildialog.h
@@ -1,256 +1,256 @@
 /***************************************************************************
                           detaildialog.h  -  description
                              -------------------
     begin                : Sun May 5 2002
     copyright            : (C) 2002 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "ui_details_data.h"
 #include "ui_details_data_comet.h"
 #include "ui_details_database.h"
 #include "ui_details_links.h"
 #include "ui_details_log.h"
 #include "ui_details_position.h"
 
 #include <kpagedialog.h>
 
 #include <QPalette>
 #include <QString>
 
 #include <memory>
 
 class QListWidgetItem;
 class QPixmap;
 
 class DataCometWidget;
 class DataWidget;
 class GeoLocation;
 class KStars;
 class KStarsDateTime;
 class SkyObject;
 
 class PositionWidget;
 class LinksWidget;
 class DatabaseWidget;
 class LogWidget;
 
 struct ADVTreeData
 {
     QString Name;
     QString Link;
     int Type;
 };
 
 /**
   * @class DetailDialog
   * DetailDialog is a window showing detailed information for a selected object.
 	* The window is split into four Tabs: General, Links, Advanced and Log.
 	* The General Tab displays some type-specific data about the object, as well as its
 	* present coordinates and Rise/Set/Transit times for the current date.  The Type-specific
 	* data are:
 	* @li Stars: common name, genetive name, Spectral type, magnitude, distance
 	* @li Solar System: name, object type (planet/comet/asteroid), Distance, magnitude (TBD),
 	* angular size (TBD)
 	* @li Deep Sky: Common name, other names, object type, magnitude, angular size
 	*
 	* The Links Tab allows the user to manage the list of Image and Information links
 	* listed in the object's popup menu.  The Advanced Tab allows the user to query
 	* a number of professional-grade online astronomical databases for data on the object.
 	* The Log tab allows the user to attach their own text notes about the object.
 	*
 	* The General Tab includes a clickable image of the object.  Clicking the image opens
 	* a Thumbnail picker tool, which downloads a list of mages of the object from the
 	* network, which the user may select as the new image for this objects Details window.
 	*
 	* @author Jason Harris, Jasem Mutlaq
 	* @version 1.0
 	*/
 class DetailDialog : public KPageDialog
 {
     Q_OBJECT
   public:
     /** Constructor */
-    DetailDialog(SkyObject *o, const KStarsDateTime &ut, GeoLocation *geo, QWidget *parent = 0);
+    DetailDialog(SkyObject *o, const KStarsDateTime &ut, GeoLocation *geo, QWidget *parent = nullptr);
 
     /** Destructor */
     ~DetailDialog() override;
 
     /** @return pointer to the QPixmap of the object's thumbnail image */
     inline QPixmap *thumbnail() { return Thumbnail.get(); }
 
   public slots:
     /** @short Slot to add this object to the observing list. */
     void addToObservingList();
 
     /** @short Slot to center this object in the display. */
     void centerMap();
 
     /** @short Slot to center this object in the telescope. */
     void centerTelescope();
 
     //TODO: showThumbnail() is only called in the ctor; make it private and not a slot.
     /** @short Slot to display the thumbnail image for the object */
     void showThumbnail();
 
     /**
      * @short Slot to update thumbnail image for the object, using the Thumbnail
      * Picker tool.
    	 * @sa ThumbnailPicker
      */
     void updateThumbnail();
 
     /** @short Slot for viewing the selected image or info URL in the web browser. */
     void viewLink();
 
     /**
      * Popup menu function: Add a custom Image or Information URL.
      * Opens the AddLinkDialog window.
      */
     void addLink();
 
     /**
      * @short Set the currently-selected URL resource.
      *
      * This function is needed because there are two QListWidgets,
      * each with its own selection.  We need to know which the user selected most recently.
      */
     void setCurrentLink(QListWidgetItem *it);
 
     /**
      * @short Rebuild the Image and Info URL lists for this object.
    	 * @note used when an item is added to either list.
      */
     void updateLists();
 
     /**
      * @short Open a dialog to edit a URL in either the Images or Info lists,
      * and update the user's *url.dat file.
      */
     void editLinkDialog();
 
     /**
      * @short remove a URL entry from either the Images or Info lists, and
      * update the user's *url.dat file.
      */
     void removeLinkDialog();
 
     /**
      * Open the web browser to the selected online astronomy database,
      * with a query to the object of this Detail Dialog.
      */
     void viewADVData();
 
     /** Save the User's text in the Log Tab to the userlog.dat file. */
     void saveLogData();
 
     /** Update View/Edit/Remove buttons */
     void updateButtons();
 
   private:
     /** Build the General Data Tab for the current object. */
     void createGeneralTab();
 
     /** Build the Position Tab for the current object. */
     void createPositionTab(const KStarsDateTime &ut, GeoLocation *geo);
 
     /**
      * Build the Links Tab, populating the image and info lists with the
      * known URLs for the current Object.
      */
     void createLinksTab();
 
     /** Build the Advanced Tab */
     void createAdvancedTab();
 
     /** Build the Log Tab */
     void createLogTab();
 
     /** Populate the TreeView of known astronomical databases in the Advanced Tab */
     void populateADVTree();
 
     /**
      * Data for the Advanced Tab TreeView is stored in the file advinterface.dat.
      * This function parses advinterface.dat.
      */
     QString parseADVData(const QString &link);
 
     /**
      * Update the local info_url and image_url files
      * @param type The URL type. 0 for Info Links, 1 for Images.
      * @param search_line The line to be search for in the local URL files
      * @param replace_line The replacement line once search_line is found.
      * @note If replace_line is empty, the function will remove search_line from the file
      */
     void updateLocalDatabase(int type, const QString &search_line, const QString &replace_line = QString());
 
     SkyObject *selectedObject { nullptr };
     QPalette titlePalette;
     QListWidgetItem *m_CurrentLink { nullptr };
     std::unique_ptr<QPixmap> Thumbnail;
     DataWidget *Data { nullptr };
     DataCometWidget *DataComet { nullptr };
     PositionWidget *Pos { nullptr };
     LinksWidget *Links { nullptr };
     DatabaseWidget *Adv { nullptr };
     LogWidget *Log { nullptr };
 };
 
 class DataWidget : public QFrame, public Ui::DetailsData
 {
   Q_OBJECT
 
   public:
-    explicit DataWidget(QWidget *parent = 0);
+    explicit DataWidget(QWidget *parent = nullptr);
 };
 
 class DataCometWidget : public QFrame, public Ui::DetailsDataComet
 {
   Q_OBJECT
 
   public:
-    explicit DataCometWidget(QWidget *parent = 0);
+    explicit DataCometWidget(QWidget *parent = nullptr);
 };
 
 class PositionWidget : public QFrame, public Ui::DetailsPosition
 {
   Q_OBJECT
 
   public:
-    explicit PositionWidget(QWidget *parent = 0);
+    explicit PositionWidget(QWidget *parent = nullptr);
 };
 
 class LinksWidget : public QFrame, public Ui::DetailsLinks
 {
   Q_OBJECT
 
   public:
-    explicit LinksWidget(QWidget *parent = 0);
+    explicit LinksWidget(QWidget *parent = nullptr);
 };
 
 class DatabaseWidget : public QFrame, public Ui::DetailsDatabase
 {
   Q_OBJECT
 
   public:
-    explicit DatabaseWidget(QWidget *parent = 0);
+    explicit DatabaseWidget(QWidget *parent = nullptr);
 };
 
 class LogWidget : public QFrame, public Ui::DetailsLog
 {
   Q_OBJECT
 
   public:
-    explicit LogWidget(QWidget *parent = 0);
+    explicit LogWidget(QWidget *parent = nullptr);
 };
diff --git a/kstars/dialogs/exportimagedialog.cpp b/kstars/dialogs/exportimagedialog.cpp
index 42457fa3d..72f3c5026 100644
--- a/kstars/dialogs/exportimagedialog.cpp
+++ b/kstars/dialogs/exportimagedialog.cpp
@@ -1,136 +1,136 @@
 /***************************************************************************
                           exportimagedialog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Mon Jun 13 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include <QtSvg/QSvgGenerator>
 #include <QDir>
 #include <QDesktopWidget>
 
 #include <KMessageBox>
 
 #include "exportimagedialog.h"
 #include "kstars.h"
 #include "skymap.h"
 #include "printing/legend.h"
 #include "skyqpainter.h"
 #include "imageexporter.h"
 
 ExportImageDialogUI::ExportImageDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 ExportImageDialog::ExportImageDialog(const QString &url, const QSize &size, ImageExporter *imgExporter)
     : QDialog((QWidget *)KStars::Instance()), m_KStars(KStars::Instance()), m_Url(url), m_Size(size)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     m_DialogUI = new ExportImageDialogUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(m_DialogUI);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(exportImage()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(close()));
 
     QPushButton *previewB = new QPushButton(i18n("Preview image"));
     buttonBox->addButton(previewB, QDialogButtonBox::ActionRole);
     connect(previewB, SIGNAL(clicked()), this, SLOT(previewImage()));
 
     connect(m_DialogUI->addLegendCheckBox, SIGNAL(toggled(bool)), this, SLOT(switchLegendEnabled(bool)));
     connect(m_DialogUI->addLegendCheckBox, SIGNAL(toggled(bool)), previewB, SLOT(setEnabled(bool)));
 
     m_ImageExporter = ((imgExporter) ? imgExporter : new ImageExporter(this));
 
     setWindowTitle(i18n("Export sky image"));
 
     setupWidgets();
 }
 
 void ExportImageDialog::switchLegendEnabled(bool enabled)
 {
     m_DialogUI->legendOrientationLabel->setEnabled(enabled);
     m_DialogUI->legendOrientationComboBox->setEnabled(enabled);
     m_DialogUI->legendTypeLabel->setEnabled(enabled);
     m_DialogUI->legendTypeComboBox->setEnabled(enabled);
     m_DialogUI->legendPositionLabel->setEnabled(enabled);
     m_DialogUI->legendPositionComboBox->setEnabled(enabled);
 }
 
 void ExportImageDialog::previewImage()
 {
     updateLegendSettings();
     const Legend *legend = m_ImageExporter->getLegend();
 
     // Preview current legend settings on sky map
     m_KStars->map()->setLegend(Legend(*legend));
     m_KStars->map()->setPreviewLegend(true);
 
     // Update sky map
     m_KStars->map()->forceUpdate(true);
 
     // Hide export dialog
     hide();
 }
 
 void ExportImageDialog::setupWidgets()
 {
     m_DialogUI->addLegendCheckBox->setChecked(true);
 
     m_DialogUI->legendOrientationComboBox->addItem(i18n("Horizontal"));
     m_DialogUI->legendOrientationComboBox->addItem(i18n("Vertical"));
 
     QStringList types;
     types << i18n("Full legend") << i18n("Scale with magnitudes chart") << i18n("Only scale") << i18n("Only magnitudes")
           << i18n("Only symbols");
     m_DialogUI->legendTypeComboBox->addItems(types);
 
     QStringList positions;
     positions << i18n("Upper left corner") << i18n("Upper right corner") << i18n("Lower left corner")
               << i18n("Lower right corner");
     m_DialogUI->legendPositionComboBox->addItems(positions);
 }
 
 void ExportImageDialog::updateLegendSettings()
 {
     Legend::LEGEND_ORIENTATION orientation =
         ((m_DialogUI->legendOrientationComboBox->currentIndex() == 1) ? Legend::LO_VERTICAL : Legend::LO_HORIZONTAL);
 
     Legend::LEGEND_TYPE type = static_cast<Legend::LEGEND_TYPE>(m_DialogUI->legendTypeComboBox->currentIndex());
 
     Legend::LEGEND_POSITION pos =
         static_cast<Legend::LEGEND_POSITION>(m_DialogUI->legendPositionComboBox->currentIndex());
 
     m_ImageExporter->setLegendProperties(type, orientation, pos);
 }
 
 void ExportImageDialog::exportImage()
 {
     qDebug() << "Exporting sky image";
     updateLegendSettings();
     m_ImageExporter->includeLegend(m_DialogUI->addLegendCheckBox->isChecked());
     if (!m_ImageExporter->exportImage(m_Url))
     {
-        KMessageBox::sorry(0, m_ImageExporter->getLastErrorMessage(), i18n("Could not export image"));
+        KMessageBox::sorry(nullptr, m_ImageExporter->getLastErrorMessage(), i18n("Could not export image"));
     }
 }
diff --git a/kstars/dialogs/exportimagedialog.h b/kstars/dialogs/exportimagedialog.h
index 1523a105c..9bf0df5de 100644
--- a/kstars/dialogs/exportimagedialog.h
+++ b/kstars/dialogs/exportimagedialog.h
@@ -1,79 +1,79 @@
 /***************************************************************************
                           exportimagedialog.h  -  K Desktop Planetarium
                              -------------------
     begin                : Mon Jun 13 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef EXPORTIMAGEDIALOG_H
 #define EXPORTIMAGEDIALOG_H
 
 #include "ui_exportimagedialog.h"
 
 #include "../printing/legend.h"
 
 #include <QDialog>
 
 class KStars;
 class QString;
 class QSize;
 class ImageExporter;
 
 // ExportImageDialog user interface.
 class ExportImageDialogUI : public QFrame, public Ui::ExportImageDialog
 {
     Q_OBJECT
 
   public:
-    explicit ExportImageDialogUI(QWidget *parent = 0);
+    explicit ExportImageDialogUI(QWidget *parent = nullptr);
 };
 
 /** @short Export sky image dialog. This dialog enables user to set up basic legend
   properties before image is exported.
   */
 class ExportImageDialog : public QDialog
 {
     Q_OBJECT
 
   public:
     /**short Default constructor. Creates dialog operating on passed URL and
           output image width and height.
           *@param url URL for exported image.
           *@param size size of exported image.
           *@param imgExporter A pointer to an ImageExporter that we can use instead of creating our own. if 0, we will create our own.
           */
-    ExportImageDialog(const QString &url, const QSize &size, ImageExporter *imgExporter = 0);
+    ExportImageDialog(const QString &url, const QSize &size, ImageExporter *imgExporter = nullptr);
 
     /** @short Default destructor. */
     ~ExportImageDialog() override {}
 
     inline void setOutputUrl(const QString &url) { m_Url = url; }
     inline void setOutputSize(const QSize &size) { m_Size = size; }
 
   private slots:
     void switchLegendEnabled(bool enabled);
     void previewImage();
     void exportImage();
 
     void setupWidgets();
     void updateLegendSettings();
 
   private:
     KStars *m_KStars;
     ExportImageDialogUI *m_DialogUI;
     QString m_Url;
     QSize m_Size;
     ImageExporter *m_ImageExporter;
 };
 
 #endif // EXPORTIMAGEDIALOG_H
diff --git a/kstars/dialogs/finddialog.cpp b/kstars/dialogs/finddialog.cpp
index d2aa890bd..fd954e538 100644
--- a/kstars/dialogs/finddialog.cpp
+++ b/kstars/dialogs/finddialog.cpp
@@ -1,422 +1,422 @@
 /***************************************************************************
                           finddialog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Wed Jul 4 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "finddialog.h"
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #include "detaildialog.h"
 #include "skyobjects/skyobject.h"
 #include "skyobjects/deepskyobject.h"
 #include "skycomponents/starcomponent.h"
 #include "skycomponents/syncedcatalogcomponent.h"
 #include "skycomponents/skymapcomposite.h"
 #include "tools/nameresolver.h"
 #include "skyobjectlistmodel.h"
 
 #include <KMessageBox>
 
 #include <QSortFilterProxyModel>
 #include <QStringListModel>
 #include <QTimer>
 
 FindDialogUI::FindDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 
     FilterType->addItem(i18n("Any"));
     FilterType->addItem(i18n("Stars"));
     FilterType->addItem(i18n("Solar System"));
     FilterType->addItem(i18n("Open Clusters"));
     FilterType->addItem(i18n("Globular Clusters"));
     FilterType->addItem(i18n("Gaseous Nebulae"));
     FilterType->addItem(i18n("Planetary Nebulae"));
     FilterType->addItem(i18n("Galaxies"));
     FilterType->addItem(i18n("Comets"));
     FilterType->addItem(i18n("Asteroids"));
     FilterType->addItem(i18n("Constellations"));
     FilterType->addItem(i18n("Supernovae"));
     FilterType->addItem(i18n("Satellites"));
 
     SearchList->setMinimumWidth(256);
     SearchList->setMinimumHeight(320);
 }
 
-FindDialog::FindDialog(QWidget *parent) : QDialog(parent), timer(0), m_targetObject(0)
+FindDialog::FindDialog(QWidget *parent) : QDialog(parent), timer(nullptr), m_targetObject(nullptr)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     ui = new FindDialogUI(this);
 
     setWindowTitle(i18n("Find Object"));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(ui);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(slotOk()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     okB = buttonBox->button(QDialogButtonBox::Ok);
 
     QPushButton *detailB = new QPushButton(i18n("Details..."));
     buttonBox->addButton(detailB, QDialogButtonBox::ActionRole);
     connect(detailB, SIGNAL(clicked()), this, SLOT(slotDetails()));
 
     ui->InternetSearchButton->setVisible(Options::resolveNamesOnline());
     ui->InternetSearchButton->setEnabled(false);
     connect(ui->InternetSearchButton, SIGNAL(clicked()), this, SLOT(slotResolve()));
 
     ui->FilterType->setCurrentIndex(0); // show all types of objects
 
     fModel    = new SkyObjectListModel(this);
     sortModel = new QSortFilterProxyModel(ui->SearchList);
     sortModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
     sortModel->setSourceModel(fModel);
     sortModel->setSortRole(Qt::DisplayRole);
     sortModel->setFilterRole(Qt::DisplayRole);
     sortModel->setDynamicSortFilter(true);
     sortModel->sort(0);
 
     ui->SearchList->setModel(sortModel);
 
     // Connect signals to slots
     connect(ui->SearchBox, SIGNAL(textChanged(QString)), SLOT(enqueueSearch()));
     connect(ui->SearchBox, SIGNAL(returnPressed()), SLOT(slotOk()));
     connect(ui->FilterType, SIGNAL(activated(int)), this, SLOT(enqueueSearch()));
     connect(ui->SearchList, SIGNAL(doubleClicked(QModelIndex)), SLOT(slotOk()));
 
     // Set focus to object name edit
     ui->SearchBox->setFocus();
 
     // First create and paint dialog and then load list
     QTimer::singleShot(0, this, SLOT(init()));
 
     listFiltered = false;
 }
 
 FindDialog::~FindDialog()
 {
 }
 
 void FindDialog::init()
 {
     ui->SearchBox->clear();
     filterByType();
     sortModel->sort(0);
     initSelection();
-    m_targetObject = 0;
+    m_targetObject = nullptr;
 }
 
 void FindDialog::initSelection()
 {
     if (sortModel->rowCount() <= 0)
     {
         okB->setEnabled(false);
         return;
     }
 
     if (ui->SearchBox->text().isEmpty())
     {
         //Pre-select the first item
         QModelIndex selectItem = sortModel->index(0, sortModel->filterKeyColumn(), QModelIndex());
         switch (ui->FilterType->currentIndex())
         {
             case 0: //All objects, choose Andromeda galaxy
             {
                 QModelIndex qmi = fModel->index(fModel->indexOf(i18n("Andromeda Galaxy")));
                 selectItem      = sortModel->mapFromSource(qmi);
                 break;
             }
             case 1: //Stars, choose Aldebaran
             {
                 QModelIndex qmi = fModel->index(fModel->indexOf(i18n("Aldebaran")));
                 selectItem      = sortModel->mapFromSource(qmi);
                 break;
             }
             case 2: //Solar system or Asteroids, choose Aaltje
             case 9:
             {
                 QModelIndex qmi = fModel->index(fModel->indexOf(i18n("Aaltje")));
                 selectItem      = sortModel->mapFromSource(qmi);
                 break;
             }
             case 8: //Comets, choose 'Aarseth-Brewington (1989 W1)'
             {
                 QModelIndex qmi = fModel->index(fModel->indexOf(i18n("Aarseth-Brewington (1989 W1)")));
                 selectItem      = sortModel->mapFromSource(qmi);
                 break;
             }
         }
 
         if (selectItem.isValid())
         {
             ui->SearchList->selectionModel()->select(selectItem, QItemSelectionModel::ClearAndSelect);
             ui->SearchList->scrollTo(selectItem);
             ui->SearchList->setCurrentIndex(selectItem);
 
             okB->setEnabled(true);
         }
     }
 
     listFiltered = true;
 }
 
 void FindDialog::filterByType()
 {
     KStarsData *data = KStarsData::Instance();
 
     switch (ui->FilterType->currentIndex())
     {
         case 0: // All object types
         {
             QVector<QPair<QString, const SkyObject *>> allObjects;
             foreach (int type, data->skyComposite()->objectLists().keys())
             {
                 allObjects.append(data->skyComposite()->objectLists(SkyObject::TYPE(type)));
             }
             fModel->setSkyObjectsList(allObjects);
             break;
         }
         case 1: //Stars
         {
             QVector<QPair<QString, const SkyObject *>> starObjects;
             starObjects.append(data->skyComposite()->objectLists(SkyObject::STAR));
             starObjects.append(data->skyComposite()->objectLists(SkyObject::CATALOG_STAR));
             fModel->setSkyObjectsList(starObjects);
             break;
         }
         case 2: //Solar system
         {
             QVector<QPair<QString, const SkyObject *>> ssObjects;
             ssObjects.append(data->skyComposite()->objectLists(SkyObject::PLANET));
             ssObjects.append(data->skyComposite()->objectLists(SkyObject::COMET));
             ssObjects.append(data->skyComposite()->objectLists(SkyObject::ASTEROID));
             ssObjects.append(data->skyComposite()->objectLists(SkyObject::MOON));
 
             fModel->setSkyObjectsList(ssObjects);
             break;
         }
         case 3: //Open Clusters
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::OPEN_CLUSTER));
             break;
         case 4: //Globular Clusters
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::GLOBULAR_CLUSTER));
             break;
         case 5: //Gaseous nebulae
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::GASEOUS_NEBULA));
             break;
         case 6: //Planetary nebula
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::PLANETARY_NEBULA));
             break;
         case 7: //Galaxies
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::GALAXY));
             break;
         case 8: //Comets
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::COMET));
             break;
         case 9: //Asteroids
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::ASTEROID));
             break;
         case 10: //Constellations
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::CONSTELLATION));
             break;
         case 11: //Supernovae
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::SUPERNOVA));
             break;
         case 12: //Satellites
             fModel->setSkyObjectsList(data->skyComposite()->objectLists(SkyObject::SATELLITE));
             break;
     }
 }
 
 void FindDialog::filterList()
 {
     QString SearchText = processSearchText();
     sortModel->setFilterFixedString(SearchText);
     ui->InternetSearchButton->setText(i18n("or search the internet for %1", SearchText));
     filterByType();
     initSelection();
 
     //Select the first item in the list that begins with the filter string
     if (!SearchText.isEmpty())
     {
         QStringList mItems = fModel->filter(QRegExp('^' + SearchText, Qt::CaseInsensitive));
         mItems.sort();
 
         if (mItems.size())
         {
             QModelIndex qmi        = fModel->index(fModel->indexOf(mItems[0]));
             QModelIndex selectItem = sortModel->mapFromSource(qmi);
 
             if (selectItem.isValid())
             {
                 ui->SearchList->selectionModel()->select(selectItem, QItemSelectionModel::ClearAndSelect);
                 ui->SearchList->scrollTo(selectItem);
                 ui->SearchList->setCurrentIndex(selectItem);
 
                 okB->setEnabled(true);
             }
         }
         ui->InternetSearchButton->setEnabled(!mItems.contains(
             SearchText)); // Disable searching the internet when an exact match for SearchText exists in KStars
     }
     else
         ui->InternetSearchButton->setEnabled(false);
 
     listFiltered = true;
 }
 
 SkyObject *FindDialog::selectedObject() const
 {
     QModelIndex i = ui->SearchList->currentIndex();
     QVariant sObj = sortModel->data(sortModel->index(i.row(), 0), SkyObjectListModel::SkyObjectRole);
 
     return reinterpret_cast<SkyObject*>(sObj.value<void *>());
 }
 
 void FindDialog::enqueueSearch()
 {
     listFiltered = false;
     if (timer)
     {
         timer->stop();
     }
     else
     {
         timer = new QTimer(this);
         timer->setSingleShot(true);
         connect(timer, SIGNAL(timeout()), this, SLOT(filterList()));
     }
     timer->start(500);
 }
 
 // Process the search box text to replace equivalent names like "m93" with "m 93"
 QString FindDialog::processSearchText()
 {
     QRegExp re;
     QString searchtext = ui->SearchBox->text();
 
     re.setCaseSensitivity(Qt::CaseInsensitive);
 
     // If it is an NGC/IC/M catalog number, as in "M 76" or "NGC 5139", check for absence of the space
     re.setPattern("^(m|ngc|ic)\\s*\\d*$");
     if (ui->SearchBox->text().contains(re))
     {
         re.setPattern("\\s*(\\d+)");
         searchtext.replace(re, " \\1");
         re.setPattern("\\s*$");
         searchtext.remove(re);
         re.setPattern("^\\s*");
         searchtext.remove(re);
     }
 
     // TODO after KDE 4.1 release:
     // If it is a IAU standard three letter abbreviation for a constellation, then go to that constellation
     // Check for genetive names of stars. Example: alp CMa must go to alpha Canis Majoris
 
     return searchtext;
 }
 
 void FindDialog::slotOk()
 {
     //If no valid object selected, show a sorry-box.  Otherwise, emit accept()
     SkyObject *selObj;
     if (!listFiltered)
     {
         filterList();
     }
     selObj = selectedObject();
     finishProcessing(selObj, Options::resolveNamesOnline());
 }
 
 void FindDialog::slotResolve()
 {
-    finishProcessing(0, true);
+    finishProcessing(nullptr, true);
 }
 
 void FindDialog::finishProcessing(SkyObject *selObj, bool resolve)
 {
     if (!selObj && resolve)
     {
         CatalogEntryData cedata;
         cedata             = NameResolver::resolveName(processSearchText());
-        DeepSkyObject *dso = 0;
+        DeepSkyObject *dso = nullptr;
         if (!std::isnan(cedata.ra) && !std::isnan(cedata.dec))
         {
             dso = KStarsData::Instance()->skyComposite()->internetResolvedComponent()->addObject(cedata);
             if (dso)
                 qDebug() << dso->ra0().toHMSString() << ";" << dso->dec0().toDMSString();
             selObj = dso;
         }
     }
     m_targetObject = selObj;
-    if (selObj == 0)
+    if (selObj == nullptr)
     {
         QString message = i18n("No object named %1 found.", ui->SearchBox->text());
-        KMessageBox::sorry(0, message, i18n("Bad object name"));
+        KMessageBox::sorry(nullptr, message, i18n("Bad object name"));
     }
     else
     {
         selObj->updateCoordsNow(KStarsData::Instance()->updateNum());
         accept();
     }
 }
 void FindDialog::keyPressEvent(QKeyEvent *e)
 {
     switch (e->key())
     {
         case Qt::Key_Escape:
             reject();
             break;
         case Qt::Key_Up:
         {
             int currentRow = ui->SearchList->currentIndex().row();
             if (currentRow > 0)
             {
                 QModelIndex selectItem = sortModel->index(currentRow - 1, sortModel->filterKeyColumn(), QModelIndex());
                 ui->SearchList->selectionModel()->setCurrentIndex(selectItem, QItemSelectionModel::SelectCurrent);
             }
             break;
         }
         case Qt::Key_Down:
         {
             int currentRow = ui->SearchList->currentIndex().row();
             if (currentRow < sortModel->rowCount() - 1)
             {
                 QModelIndex selectItem = sortModel->index(currentRow + 1, sortModel->filterKeyColumn(), QModelIndex());
                 ui->SearchList->selectionModel()->setCurrentIndex(selectItem, QItemSelectionModel::SelectCurrent);
             }
             break;
         }
     }
 }
 
 void FindDialog::slotDetails()
 {
     if (selectedObject())
     {
         QPointer<DetailDialog> dd = new DetailDialog(selectedObject(), KStarsData::Instance()->ut(),
                                                      KStarsData::Instance()->geo(), KStars::Instance());
         dd->exec();
         delete dd;
     }
 }
diff --git a/kstars/dialogs/finddialog.h b/kstars/dialogs/finddialog.h
index c03035269..480d5117e 100644
--- a/kstars/dialogs/finddialog.h
+++ b/kstars/dialogs/finddialog.h
@@ -1,134 +1,134 @@
 /***************************************************************************
                           finddialog.h  -  K Desktop Planetarium
                              -------------------
     begin                : Wed Jul 4 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef FINDDIALOG_H_
 #define FINDDIALOG_H_
 
 #include <QKeyEvent>
 #include <QDialog>
 
 #include "ui_finddialog.h"
 
 class QTimer;
 class QStringListModel;
 class QSortFilterProxyModel;
 class SkyObjectListModel;
 class SkyObject;
 
 class FindDialogUI : public QFrame, public Ui::FindDialog
 {
     Q_OBJECT
   public:
-    explicit FindDialogUI(QWidget *parent = 0);
+    explicit FindDialogUI(QWidget *parent = nullptr);
 };
 
 /** @class FindDialog
  * Dialog window for finding SkyObjects by name.  The dialog contains
  * a QListBox showing the list of named objects, a QLineEdit for filtering
  * the list by name, and a QCombobox for filtering the list by object type.
  *
  * @short Find Object Dialog
  * @author Jason Harris
  * @version 1.0
  */
 class FindDialog : public QDialog
 {
     Q_OBJECT
   public:
     /**Constructor. Creates all widgets and packs them in QLayouts.  Connects
          * Signals and Slots.  Runs initObjectList().
          */
-    explicit FindDialog(QWidget *parent = 0);
+    explicit FindDialog(QWidget *parent = nullptr);
 
     /** Destructor */
     ~FindDialog() override;
 
     /**
          * @return the target object (need not be the same as currently selected object!)
          *
          * @note Avoid using selectedObject()
          */
     inline SkyObject *targetObject() { return m_targetObject; }
 
   public slots:
     /**When Text is entered in the QLineEdit, filter the List of objects
          * so that only objects which start with the filter text are shown.
          */
     void filterList();
 
     //FIXME: Still valid for QDialog?  i.e., does QDialog have a slotOk() ?
     /**
          *Overloading the Standard QDialogBase slotOk() to show a "sorry"
          *message box if no object is selected and internet resolution was
          *disabled/failed when the user presses Ok.  The window is not
          *closed in this case.
          */
     void slotOk();
 
     /**
          * @short This slot resolves the object on the internet, ignoring the selection on the list
          */
     void slotResolve();
 
   private slots:
     /** Init object list after opening dialog. */
     void init();
 
     /** Set the selected item to the first item in the list */
     void initSelection();
 
     void enqueueSearch();
 
     void slotDetails();
 
   protected:
     /**Process Keystrokes.  The Up and Down arrow keys are used to select the
          * Previous/Next item in the listbox of named objects.  The Esc key closes
          * the window with no selection, using reject().
          * @param e The QKeyEvent pointer
          */
     void keyPressEvent(QKeyEvent *e) override;
 
     /** @return the currently-selected item from the listbox of named objects */
     SkyObject *selectedObject() const;
 
   private:
     /** @short Do some post processing on the search text to interpret what the user meant
          * This could include replacing text like "m93" with "m 93"
          */
     QString processSearchText();
 
     /**
          * @short Finishes the processing towards closing the dialog initiated by slotOk() or slotResolve()
          */
-    void finishProcessing(SkyObject *selObj = 0, bool resolve = true);
+    void finishProcessing(SkyObject *selObj = nullptr, bool resolve = true);
 
     /** @short pre-filter the list of objects according to the
          * selected object type.
          */
     void filterByType();
 
     FindDialogUI *ui;
     SkyObjectListModel *fModel;
     QSortFilterProxyModel *sortModel;
     QTimer *timer;
     bool listFiltered;
     QPushButton *okB;
     SkyObject *m_targetObject;
 };
 
 #endif
diff --git a/kstars/dialogs/focusdialog.cpp b/kstars/dialogs/focusdialog.cpp
index 2e91acb6a..fdae7e584 100644
--- a/kstars/dialogs/focusdialog.cpp
+++ b/kstars/dialogs/focusdialog.cpp
@@ -1,163 +1,163 @@
 /***************************************************************************
                           focusdialog.cpp  -  description
                              -------------------
     begin                : Sat Mar 23 2002
     copyright            : (C) 2002 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "focusdialog.h"
 
 #include "dms.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "skyobjects/skypoint.h"
 
 #include <KLocalizedString>
 #include <KMessageBox>
 
 #include <QVBoxLayout>
 
 FocusDialogUI::FocusDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 FocusDialog::FocusDialog() : QDialog(KStars::Instance())
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     //initialize point to the current focus position
     Point = SkyMap::Instance()->focus();
 
     fd = new FocusDialogUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(fd);
     setLayout(mainLayout);
 
     setWindowTitle(i18n("Set Coordinates Manually"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(validatePoint()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     okB = buttonBox->button(QDialogButtonBox::Ok);
     okB->setEnabled(false);
 
     fd->epochBox->setValidator(new QDoubleValidator(fd->epochBox));
     fd->raBox->setMinimumWidth(fd->raBox->fontMetrics().boundingRect("00h 00m 00s").width());
     fd->azBox->setMinimumWidth(fd->raBox->fontMetrics().boundingRect("00h 00m 00s").width());
 
     fd->raBox->setDegType(false); //RA box should be HMS-style
     fd->raBox->setFocus();        //set input focus
 
     connect(fd->raBox, SIGNAL(textChanged(QString)), this, SLOT(checkLineEdits()));
     connect(fd->decBox, SIGNAL(textChanged(QString)), this, SLOT(checkLineEdits()));
     connect(fd->azBox, SIGNAL(textChanged(QString)), this, SLOT(checkLineEdits()));
     connect(fd->altBox, SIGNAL(textChanged(QString)), this, SLOT(checkLineEdits()));
 }
 
 void FocusDialog::checkLineEdits()
 {
     bool raOk(false), decOk(false), azOk(false), altOk(false);
 
     fd->raBox->createDms(false, &raOk);
     fd->decBox->createDms(true, &decOk);
     fd->azBox->createDms(true, &azOk);
     fd->altBox->createDms(true, &altOk);
 
     if ((raOk && decOk) || (azOk && altOk))
         okB->setEnabled(true);
     else
         okB->setEnabled(false);
 }
 
 void FocusDialog::validatePoint()
 {
     bool raOk(false), decOk(false), azOk(false), altOk(false);
 
     //false means expressed in hours
     dms ra(fd->raBox->createDms(false, &raOk));
     dms dec(fd->decBox->createDms(true, &decOk));
 
     QString message;
 
     if (raOk && decOk)
     {
         //make sure values are in valid range
         if (ra.Hours() < 0.0 || ra.Hours() > 24.0)
             message = i18n("The Right Ascension value must be between 0.0 and 24.0.");
         if (dec.Degrees() < -90.0 || dec.Degrees() > 90.0)
             message += '\n' + i18n("The Declination value must be between -90.0 and 90.0.");
         if (!message.isEmpty())
         {
-            KMessageBox::sorry(0, message, i18n("Invalid Coordinate Data"));
+            KMessageBox::sorry(nullptr, message, i18n("Invalid Coordinate Data"));
             return;
         }
 
         Point->set(ra, dec);
         bool ok;
 
         double epoch0   = KStarsDateTime::stringToEpoch(fd->epochBox->text(), ok);
         long double jd0 = KStarsDateTime::epochToJd(epoch0);
         Point->apparentCoord(jd0, KStarsData::Instance()->ut().djd());
         Point->EquatorialToHorizontal(KStarsData::Instance()->lst(), KStarsData::Instance()->geo()->lat());
 
         QDialog::accept();
     }
     else
     {
         dms az(fd->azBox->createDms(true, &azOk));
         dms alt(fd->altBox->createDms(true, &altOk));
 
         if (azOk && altOk)
         {
             //make sure values are in valid range
             if (az.Degrees() < 0.0 || az.Degrees() > 360.0)
                 message = i18n("The Azimuth value must be between 0.0 and 360.0.");
             if (alt.Degrees() < -90.0 || alt.Degrees() > 90.0)
                 message += '\n' + i18n("The Altitude value must be between -90.0 and 90.0.");
             if (!message.isEmpty())
             {
-                KMessageBox::sorry(0, message, i18n("Invalid Coordinate Data"));
+                KMessageBox::sorry(nullptr, message, i18n("Invalid Coordinate Data"));
                 return;
             }
 
             Point->setAz(az);
             Point->setAlt(alt);
             Point->HorizontalToEquatorial(KStarsData::Instance()->lst(), KStarsData::Instance()->geo()->lat());
 
             UsedAltAz = true;
 
             QDialog::accept();
         }
         else
         {
             QDialog::reject();
         }
     }
 }
 
 QSize FocusDialog::sizeHint() const
 {
     return QSize(240, 210);
 }
 
 void FocusDialog::activateAzAltPage() const
 {
     fd->fdTab->setCurrentWidget(fd->aaTab);
     fd->azBox->setFocus();
 }
diff --git a/kstars/dialogs/fovdialog.cpp b/kstars/dialogs/fovdialog.cpp
index 438b4c9ce..771a4048c 100644
--- a/kstars/dialogs/fovdialog.cpp
+++ b/kstars/dialogs/fovdialog.cpp
@@ -1,400 +1,400 @@
 /***************************************************************************
                           fovdialog.cpp  -  description
                              -------------------
     begin                : Fri 05 Sept 2003
     copyright            : (C) 2003 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "fovdialog.h"
 
 #include <QFile>
 #include <QFrame>
 #include <QPainter>
 #include <QTextStream>
 #include <QPaintEvent>
 #include <QDebug>
 #include <QPushButton>
 #include <QComboBox>
 #include <QDoubleSpinBox>
 #include <QLineEdit>
 
 #include <KActionCollection>
 #include <KLocalizedString>
 #include <kcolorbutton.h>
 #include <KMessageBox>
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "widgets/fovwidget.h"
 
 // This is needed to make FOV work with QVariant
 Q_DECLARE_METATYPE(FOV *)
 
 int FOVDialog::fovID = -1;
 
 namespace
 {
 // Try to convert text in KLine edit to double
-inline double textToDouble(const QLineEdit *edit, bool *ok = 0)
+inline double textToDouble(const QLineEdit *edit, bool *ok = nullptr)
 {
     return edit->text().replace(QLocale().decimalPoint(), ".").toDouble(ok);
 }
 
 // Extract FOV from QListWidget. No checking is done
 FOV *getFOV(QListWidgetItem *item)
 {
     return item->data(Qt::UserRole).value<FOV *>();
 }
 
 // Convert double to QString
 QString toString(double x, int precision = 2)
 {
     return QString::number(x, 'f', precision).replace('.', QLocale().decimalPoint());
 }
 }
 
 FOVDialogUI::FOVDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 NewFOVUI::NewFOVUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 //---------FOVDialog---------------//
 FOVDialog::FOVDialog(QWidget *p) : QDialog(p)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     // Register FOV* data type
     if (fovID == -1)
         fovID = qRegisterMetaType<FOV *>("FOV*");
     fov = new FOVDialogUI(this);
 
     setWindowTitle(i18n("Set FOV Indicator"));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(fov);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(close()));
 
     connect(fov->FOVListBox, SIGNAL(currentRowChanged(int)), SLOT(slotSelect(int)));
     connect(fov->NewButton, SIGNAL(clicked()), SLOT(slotNewFOV()));
     connect(fov->EditButton, SIGNAL(clicked()), SLOT(slotEditFOV()));
     connect(fov->RemoveButton, SIGNAL(clicked()), SLOT(slotRemoveFOV()));
 
     // Read list of FOVs and for each FOV create listbox entry, which stores it.
     foreach (FOV *f, FOVManager::getFOVs())
     {
         addListWidget(f);
     }
 }
 
 FOVDialog::~FOVDialog()
 {
     // Delete FOVs
     //for(int i = 0; i < fov->FOVListBox->count(); i++) {
     //delete getFOV( fov->FOVListBox->item(i) );
     //}
 }
 
 QListWidgetItem *FOVDialog::addListWidget(FOV *f)
 {
     QListWidgetItem *item = new QListWidgetItem(f->name(), fov->FOVListBox);
     item->setData(Qt::UserRole, QVariant::fromValue<FOV *>(f));
     return item;
 }
 
 void FOVDialog::slotSelect(int irow)
 {
     bool enable = irow >= 0;
     fov->RemoveButton->setEnabled(enable);
     fov->EditButton->setEnabled(enable);
     if (enable)
     {
         //paint dialog with selected FOV symbol
         fov->ViewBox->setFOV(getFOV(fov->FOVListBox->currentItem()));
         fov->ViewBox->update();
     }
 }
 
 void FOVDialog::slotNewFOV()
 {
     QPointer<NewFOV> newfdlg = new NewFOV(this);
     if (newfdlg->exec() == QDialog::Accepted)
     {
         FOV *newfov = new FOV(newfdlg->getFOV());
         FOVManager::addFOV(newfov);
         addListWidget(newfov);
         fov->FOVListBox->setCurrentRow(fov->FOVListBox->count() - 1);
     }
     delete newfdlg;
 }
 
 void FOVDialog::slotEditFOV()
 {
     //Preload current values
     QListWidgetItem *item = fov->FOVListBox->currentItem();
-    if (item == 0)
+    if (item == nullptr)
         return;
     FOV *f = item->data(Qt::UserRole).value<FOV *>();
 
     // Create dialog
     QPointer<NewFOV> newfdlg = new NewFOV(this, f);
     if (newfdlg->exec() == QDialog::Accepted)
     {
         // Overwrite FOV
         *f = newfdlg->getFOV();
         fov->ViewBox->update();
     }
     delete newfdlg;
 }
 
 void FOVDialog::slotRemoveFOV()
 {
     int i = fov->FOVListBox->currentRow();
     if (i >= 0)
     {
         QListWidgetItem *item = fov->FOVListBox->takeItem(i);
         FOVManager::removeFOV(getFOV(item));
         delete item;
     }
 }
 
 //-------------NewFOV------------------//
 
 NewFOV::NewFOV(QWidget *parent, const FOV *fov) : QDialog(parent), f()
 {
     ui = new NewFOVUI(this);
 
     setWindowTitle(i18n("New FOV Indicator"));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(ui);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     okB = buttonBox->button(QDialogButtonBox::Ok);
 
     // Initialize FOV if required
-    if (fov != 0)
+    if (fov != nullptr)
     {
         f = *fov;
         ui->FOVName->setText(f.name());
         ui->FOVEditX->setText(toString(f.sizeX()));
         ui->FOVEditY->setText(toString(f.sizeY()));
         ui->FOVEditOffsetX->setText(toString(f.offsetX()));
         ui->FOVEditOffsetY->setText(toString(f.offsetY()));
         ui->FOVEditRotation->setText(toString(f.rotation()));
         ui->ColorButton->setColor(QColor(f.color()));
         ui->ShapeBox->setCurrentIndex(f.shape());
 
         ui->ViewBox->setFOV(&f);
         ui->ViewBox->update();
     }
 
     connect(ui->FOVName, SIGNAL(textChanged(QString)), SLOT(slotUpdateFOV()));
     connect(ui->FOVEditX, SIGNAL(textChanged(QString)), SLOT(slotUpdateFOV()));
     connect(ui->FOVEditY, SIGNAL(textChanged(QString)), SLOT(slotUpdateFOV()));
     connect(ui->FOVEditOffsetX, SIGNAL(textChanged(QString)), SLOT(slotUpdateFOV()));
     connect(ui->FOVEditOffsetY, SIGNAL(textChanged(QString)), SLOT(slotUpdateFOV()));
     connect(ui->FOVEditRotation, SIGNAL(textChanged(QString)), SLOT(slotUpdateFOV()));
     connect(ui->ColorButton, SIGNAL(changed(QColor)), SLOT(slotUpdateFOV()));
     connect(ui->ShapeBox, SIGNAL(activated(int)), SLOT(slotUpdateFOV()));
     connect(ui->ComputeEyeFOV, SIGNAL(clicked()), SLOT(slotComputeFOV()));
     connect(ui->ComputeCameraFOV, SIGNAL(clicked()), SLOT(slotComputeFOV()));
     connect(ui->ComputeHPBW, SIGNAL(clicked()), SLOT(slotComputeFOV()));
     connect(ui->ComputeBinocularFOV, SIGNAL(clicked()), SLOT(slotComputeFOV()));
     connect(ui->ComputeTLengthFromFNum1, SIGNAL(clicked()), SLOT(slotComputeTelescopeFL()));
     connect(ui->ComputeTLengthFromFNum2, SIGNAL(clicked()), SLOT(slotComputeTelescopeFL()));
 
     // Populate eyepiece AFOV options. The userData field contains the apparent FOV associated with that option
     ui->EyepieceAFOV->insertItem(0, i18nc("Specify the apparent field of view (AFOV) manually", "Specify AFOV"), -1);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Ramsden (Typical)"), 30);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Orthoscopic (Typical)"), 45);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Ploessl (Typical)"), 50);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Erfle (Typical)"), 60);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Tele Vue Radian"), 60);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Baader Hyperion"), 68);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Tele Vue Panoptic"), 68);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Tele Vue Delos"), 72);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Meade UWA"), 82);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Tele Vue Nagler"), 82);
     ui->EyepieceAFOV->addItem(i18nc("Eyepiece Design / Brand / Name; Optional", "Tele Vue Ethos (Typical)"), 100);
 
     connect(ui->EyepieceAFOV, SIGNAL(currentIndexChanged(int)), SLOT(slotEyepieceAFOVChanged(int)));
 
     ui->LinearFOVDistance->insertItem(0, i18n("1000 yards"));
     ui->LinearFOVDistance->insertItem(1, i18n("1000 meters"));
     connect(ui->LinearFOVDistance, SIGNAL(currentIndexChanged(int)), SLOT(slotBinocularFOVDistanceChanged(int)));
 
     slotUpdateFOV();
 }
 
 void NewFOV::slotBinocularFOVDistanceChanged(int index)
 {
     QString text = (index == 0 ? i18n("feet") : i18n("meters"));
     ui->LabelUnits->setText(text);
 }
 
 void NewFOV::slotUpdateFOV()
 {
     bool okX, okY;
     f.setName(ui->FOVName->text());
     float sizeX = textToDouble(ui->FOVEditX, &okX);
     float sizeY = textToDouble(ui->FOVEditY, &okY);
     if (okX && okY)
         f.setSize(sizeX, sizeY);
 
     float xoffset = textToDouble(ui->FOVEditOffsetX, &okX);
     float yoffset = textToDouble(ui->FOVEditOffsetY, &okY);
     if (okX && okY)
         f.setOffset(xoffset, yoffset);
 
     float rot = textToDouble(ui->FOVEditRotation, &okX);
     if (okX)
         f.setRotation(rot);
 
     f.setShape(ui->ShapeBox->currentIndex());
     f.setColor(ui->ColorButton->color().name());
 
     okB->setEnabled(!f.name().isEmpty() && okX && okY);
 
     ui->ViewBox->setFOV(&f);
     ui->ViewBox->update();
 }
 
 void NewFOV::slotComputeFOV()
 {
     if (sender() == ui->ComputeEyeFOV && ui->TLength1->value() > 0.0)
     {
         ui->FOVEditX->setText(toString(60.0 * ui->EyeFOV->value() * ui->EyeLength->value() / ui->TLength1->value()));
         ui->FOVEditY->setText(ui->FOVEditX->text());
     }
     else if (sender() == ui->ComputeCameraFOV && ui->TLength2->value() > 0.0)
     {
         double sx = (double)ui->ChipWidth->value() * 3438.0 / ui->TLength2->value();
         double sy = (double)ui->ChipHeight->value() * 3438.0 / ui->TLength2->value();
         //const double aspectratio = 3.0/2.0; // Use the default aspect ratio for DSLRs / Film (i.e. 3:2)
         ui->FOVEditX->setText(toString(sx));
         ui->FOVEditY->setText(toString(sy));
     }
     else if (sender() == ui->ComputeHPBW && ui->RTDiameter->value() > 0.0 && ui->WaveLength->value() > 0.0)
     {
         ui->FOVEditX->setText(toString(34.34 * 1.2 * ui->WaveLength->value() / ui->RTDiameter->value()));
         // Beam width for an antenna is usually a circle on the sky.
         ui->ShapeBox->setCurrentIndex(4);
         ui->FOVEditY->setText(ui->FOVEditX->text());
         slotUpdateFOV();
     }
     else if (sender() == ui->ComputeBinocularFOV && ui->LinearFOV->value() > 0.0 &&
              ui->LinearFOVDistance->currentIndex() >= 0)
     {
         double sx =
             atan((double)ui->LinearFOV->value() / ((ui->LinearFOVDistance->currentIndex() == 0) ? 3000.0 : 1000.0)) *
             180.0 * 60.0 / dms::PI;
         ui->FOVEditX->setText(toString(sx));
         ui->FOVEditY->setText(ui->FOVEditX->text());
     }
 }
 
 void NewFOV::slotEyepieceAFOVChanged(int index)
 {
     if (index == 0)
     {
         ui->EyeFOV->setEnabled(true);
     }
     else
     {
         bool ok;
         ui->EyeFOV->setEnabled(false);
         ui->EyeFOV->setValue(ui->EyepieceAFOV->itemData(index).toFloat(&ok));
         Q_ASSERT(ok);
     }
 }
 
 void NewFOV::slotComputeTelescopeFL()
 {
     QObject *whichTab              = sender();
     TelescopeFL *telescopeFLDialog = new TelescopeFL(this);
     if (telescopeFLDialog->exec() == QDialog::Accepted)
     {
         Q_ASSERT(whichTab == ui->ComputeTLengthFromFNum1 || whichTab == ui->ComputeTLengthFromFNum2);
         ((whichTab == ui->ComputeTLengthFromFNum1) ? ui->TLength1 : ui->TLength2)
             ->setValue(telescopeFLDialog->computeFL());
     }
     delete telescopeFLDialog;
 }
 
 //-------------TelescopeFL------------------//
 
-TelescopeFL::TelescopeFL(QWidget *parent) : QDialog(parent), aperture(0), fNumber(0), apertureUnit(0)
+TelescopeFL::TelescopeFL(QWidget *parent) : QDialog(parent), aperture(nullptr), fNumber(nullptr), apertureUnit(nullptr)
 {
     setWindowTitle(i18n("Telescope Focal Length Calculator"));
 
     //QWidget *mainWidget = new QWidget( this );
     QGridLayout *mainLayout = new QGridLayout(this);
     setLayout(mainLayout);
 
     aperture = new QDoubleSpinBox();
     aperture->setRange(0.0, 100000.0);
     aperture->setDecimals(2);
     aperture->setSingleStep(0.1);
 
     fNumber = new QDoubleSpinBox();
     fNumber->setRange(0.0, 99.9);
     fNumber->setDecimals(2);
     fNumber->setSingleStep(0.1);
 
     apertureUnit = new QComboBox(this);
     apertureUnit->insertItem(0, i18nc("millimeters", "mm"));
     apertureUnit->insertItem(1, i18n("inch"));
 
     mainLayout->addWidget(new QLabel(i18n("Aperture diameter: "), this), 0, 0);
     mainLayout->addWidget(aperture, 0, 1);
     mainLayout->addWidget(apertureUnit, 0, 2);
     mainLayout->addWidget(new QLabel(i18nc("F-Number or F-Ratio of optical system", "F-Number: "), this), 1, 0);
     mainLayout->addWidget(fNumber, 1, 1);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     show();
 }
 
 double TelescopeFL::computeFL() const
 {
     const double inch_to_mm = 25.4; // 1 inch, by definition, is 25.4 mm
     return (aperture->value() * fNumber->value() *
             ((apertureUnit->currentIndex() == 1) ?
                  inch_to_mm :
                  1.0)); // Focal Length = Aperture * F-Number, by definition of F-Number
 }
 
 unsigned int FOVDialog::currentItem() const
 {
     return fov->FOVListBox->currentRow();
 }
diff --git a/kstars/dialogs/fovdialog.h b/kstars/dialogs/fovdialog.h
index 5e45e6986..d3d80273c 100644
--- a/kstars/dialogs/fovdialog.h
+++ b/kstars/dialogs/fovdialog.h
@@ -1,128 +1,128 @@
 /***************************************************************************
                           fovdialog.h  -  description
                              -------------------
     begin                : Fri 05 Sept 2003
     copyright            : (C) 2003 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef FOVDIALOG_H_
 #define FOVDIALOG_H_
 
 #include <QPaintEvent>
 #include <QDialog>
 #include <QDoubleSpinBox>
 
 #include "fov.h"
 #include "ui_fovdialog.h"
 #include "ui_newfov.h"
 
 class FOVDialogUI : public QFrame, public Ui::FOVDialog
 {
     Q_OBJECT
   public:
-    explicit FOVDialogUI(QWidget *parent = 0);
+    explicit FOVDialogUI(QWidget *parent = nullptr);
 };
 
 class NewFOVUI : public QFrame, public Ui::NewFOV
 {
     Q_OBJECT
   public:
-    explicit NewFOVUI(QWidget *parent = 0);
+    explicit NewFOVUI(QWidget *parent = nullptr);
 };
 
 /** @class FOVDialog
  *  FOVDialog is dialog to select a Field-of-View indicator (or create a new one)
     *@author Jason Harris
     *@version 1.0
     */
 class FOVDialog : public QDialog
 {
     Q_OBJECT
   public:
-    explicit FOVDialog(QWidget *parent = 0);
+    explicit FOVDialog(QWidget *parent = nullptr);
     ~FOVDialog() override;
   private slots:
     void slotNewFOV();
     void slotEditFOV();
     void slotRemoveFOV();
     void slotSelect(int);
 
   private:
     /** Add new widget to list box */
     QListWidgetItem *addListWidget(FOV *f);
 
     unsigned int currentItem() const;
     FOVDialogUI *fov;
     static int fovID;
 };
 
 /** @class NewFOV Dialog for defining a new FOV symbol
 	*@author Jason Harris
 	*@version 1.0
 	*/
 class NewFOV : public QDialog
 {
     Q_OBJECT
   public:
     /** Create new dialog
          * @param parent parent widget
          * @fov widget to copy data from. If it's empty will create empty one.
          */
-    explicit NewFOV(QWidget *parent = 0, const FOV *fov = 0);
+    explicit NewFOV(QWidget *parent = nullptr, const FOV *fov = nullptr);
     ~NewFOV() override {}
     /** Return reference to FOV. */
     const FOV &getFOV() const { return f; }
 
   public slots:
     void slotBinocularFOVDistanceChanged(int index);
     void slotUpdateFOV();
     void slotComputeFOV();
     void slotEyepieceAFOVChanged(int index);
     void slotComputeTelescopeFL();
 
   private:
     FOV f;
     NewFOVUI *ui;
     QPushButton *okB;
 };
 
 /**
  *@class TelescopeFL Dialog for calculating telescope focal length from f-number and diameter
  *@author Akarsh Simha
  *@version 1.0
  */
 
 class TelescopeFL : public QDialog
 {
     Q_OBJECT
   public:
     /**
          * Create a telescope focal length dialog
          * @param parent parent widget
          */
-    explicit TelescopeFL(QWidget *parent = 0);
+    explicit TelescopeFL(QWidget *parent = nullptr);
 
     ~TelescopeFL() override {}
 
     /**
          * Compute and return the focal length in mm
          * @return focal length in mm
          */
     double computeFL() const;
 
   private:
     QDoubleSpinBox *aperture, *fNumber;
     QComboBox *apertureUnit;
 };
 
 #endif
diff --git a/kstars/dialogs/locationdialog.cpp b/kstars/dialogs/locationdialog.cpp
index 472e34b46..1c59e9f29 100644
--- a/kstars/dialogs/locationdialog.cpp
+++ b/kstars/dialogs/locationdialog.cpp
@@ -1,750 +1,750 @@
 /***************************************************************************
                           locationdialog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 11 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "locationdialog.h"
 
 #include "kspaths.h"
 #include "kstarsdata.h"
 #include "kstars_debug.h"
 
 #include <QSqlQuery>
 
 #ifdef HAVE_GEOCLUE2
 #include <QGeoPositionInfoSource>
 #endif
 #include <QJsonArray>
 #include <QJsonDocument>
 #include <QJsonObject>
 #include <QJsonValue>
 #include <QNetworkAccessManager>
 #include <QNetworkConfigurationManager>
 #include <QNetworkReply>
 #include <QNetworkSession>
 #include <QQmlContext>
 #include <QSqlQuery>
 #include <QUrlQuery>
 
 LocationDialogUI::LocationDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
-LocationDialog::LocationDialog(QWidget *parent) : QDialog(parent), timer(0)
+LocationDialog::LocationDialog(QWidget *parent) : QDialog(parent), timer(nullptr)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     KStarsData *data = KStarsData::Instance();
 
     SelectedCity = nullptr;
     ld           = new LocationDialogUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(ld);
     setLayout(mainLayout);
 
     ld->MapView->setLocationDialog(this);
 
     setWindowTitle(i18n("Set Geographic Location"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(slotOk()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     for (int i = 0; i < 25; ++i)
         ld->TZBox->addItem(QLocale().toString((double)(i - 12)));
 
     //Populate DSTRuleBox
     foreach (const QString &key, data->getRulebook().keys())
     {
         if (!key.isEmpty())
             ld->DSTRuleBox->addItem(key);
     }
 
     ld->AddCityButton->setIcon(QIcon::fromTheme("list-add", QIcon(":/icons/breeze/default/list-add.svg")));
     ld->RemoveButton->setIcon(QIcon::fromTheme("list-remove", QIcon(":/icons/breeze/default/list-remove.svg")));
     ld->UpdateButton->setIcon(QIcon::fromTheme("svn-update", QIcon(":/icons/breeze/default/svn-update.svg")));
 
     connect(ld->CityFilter, SIGNAL(textChanged(QString)), this, SLOT(enqueueFilterCity()));
     connect(ld->ProvinceFilter, SIGNAL(textChanged(QString)), this, SLOT(enqueueFilterCity()));
     connect(ld->CountryFilter, SIGNAL(textChanged(QString)), this, SLOT(enqueueFilterCity()));
     connect(ld->NewCityName, SIGNAL(textChanged(QString)), this, SLOT(nameChanged()));
     connect(ld->NewProvinceName, SIGNAL(textChanged(QString)), this, SLOT(nameChanged()));
     connect(ld->NewCountryName, SIGNAL(textChanged(QString)), this, SLOT(nameChanged()));
     connect(ld->NewLong, SIGNAL(textChanged(QString)), this, SLOT(dataChanged()));
     connect(ld->NewLat, SIGNAL(textChanged(QString)), this, SLOT(dataChanged()));
     connect(ld->TZBox, SIGNAL(activated(int)), this, SLOT(dataChanged()));
     connect(ld->DSTRuleBox, SIGNAL(activated(int)), this, SLOT(dataChanged()));
     connect(ld->GeoBox, SIGNAL(itemSelectionChanged()), this, SLOT(changeCity()));
     connect(ld->AddCityButton, SIGNAL(clicked()), this, SLOT(addCity()));
     connect(ld->ClearFieldsButton, SIGNAL(clicked()), this, SLOT(clearFields()));
     connect(ld->RemoveButton, SIGNAL(clicked()), this, SLOT(removeCity()));
     connect(ld->UpdateButton, SIGNAL(clicked()), this, SLOT(updateCity()));
 
 // FIXME Disable this until Qt5 works with Geoclue2
 #ifdef HAVE_GEOCLUE_2
     source = QGeoPositionInfoSource::createDefaultSource(this);
     source->setPreferredPositioningMethods(QGeoPositionInfoSource::SatellitePositioningMethods);
     qDebug() << "Last known position" << source->lastKnownPosition().coordinate();
 
     connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo)));
     connect(source, SIGNAL(error(QGeoPositionInfoSource::Error)), this, SLOT(positionUpdateError(QGeoPositionInfoSource::Error)));
     connect(source, SIGNAL(updateTimeout()), this, SLOT(positionUpdateTimeout()));
 
     connect(ld->GetLocationButton, SIGNAL(clicked()), this, SLOT(requestUpdate()));
 #endif
 
     ld->DSTLabel->setText("<a href=\"showrules\">" + i18n("DST Rule:") + "</a>");
     connect(ld->DSTLabel, SIGNAL(linkActivated(QString)), this, SLOT(showTZRules()));
 
     dataModified = false;
     nameModified = false;
     ld->AddCityButton->setEnabled(false);
 
     ld->errorLabel->setText(QString());
 
 // FIXME Disable this until Qt5 works with Geoclue2
 #ifdef HAVE_GEOCLUE_2
     nam = new QNetworkAccessManager(this);
     connect(nam, SIGNAL(finished(QNetworkReply *)), this, SLOT(processLocationNameData(QNetworkReply *)));
 #endif
 
     initCityList();
     resize(640, 480);
 }
 
 void LocationDialog::initCityList()
 {
     KStarsData *data = KStarsData::Instance();
     foreach (GeoLocation *loc, data->getGeoList())
     {
         ld->GeoBox->addItem(loc->fullName());
         filteredCityList.append(loc);
 
         //If TZ is not an even integer value, add it to listbox
         if (loc->TZ0() - int(loc->TZ0()) && ld->TZBox->findText(QLocale().toString(loc->TZ0())) != -1)
         {
             for (int i = 0; i < ld->TZBox->count(); ++i)
             {
                 if (ld->TZBox->itemText(i).toDouble() > loc->TZ0())
                 {
                     ld->TZBox->addItem(QLocale().toString(loc->TZ0()), i - 1);
                     break;
                 }
             }
         }
     }
 
     //Sort the list of Cities alphabetically...note that filteredCityList may now have a different ordering!
     ld->GeoBox->sortItems();
 
     ld->CountLabel->setText(
         i18np("One city matches search criteria", "%1 cities match search criteria", ld->GeoBox->count()));
 
     // attempt to highlight the current kstars location in the GeoBox
-    ld->GeoBox->setCurrentItem(0);
+    ld->GeoBox->setCurrentItem(nullptr);
     for (int i = 0; i < ld->GeoBox->count(); i++)
     {
         if (ld->GeoBox->item(i)->text() == data->geo()->fullName())
         {
             ld->GeoBox->setCurrentRow(i);
             break;
         }
     }
 }
 
 void LocationDialog::enqueueFilterCity()
 {
     if (timer)
         timer->stop();
     else
     {
         timer = new QTimer(this);
         timer->setSingleShot(true);
         connect(timer, SIGNAL(timeout()), this, SLOT(filterCity()));
     }
     timer->start(500);
 }
 
 void LocationDialog::filterCity()
 {
     KStarsData *data = KStarsData::Instance();
     ld->GeoBox->clear();
     //Do NOT delete members of filteredCityList!
     while (!filteredCityList.isEmpty())
         filteredCityList.takeFirst();
 
     nameModified = false;
     dataModified = false;
     ld->AddCityButton->setEnabled(false);
     ld->UpdateButton->setEnabled(false);
 
     foreach (GeoLocation *loc, data->getGeoList())
     {
         QString sc(loc->translatedName());
         QString ss(loc->translatedCountry());
         QString sp = "";
         if (!loc->province().isEmpty())
             sp = loc->translatedProvince();
 
         if (sc.startsWith(ld->CityFilter->text(), Qt::CaseInsensitive) &&
             sp.startsWith(ld->ProvinceFilter->text(), Qt::CaseInsensitive) &&
             ss.startsWith(ld->CountryFilter->text(), Qt::CaseInsensitive))
         {
             ld->GeoBox->addItem(loc->fullName());
             filteredCityList.append(loc);
         }
     }
 
     ld->GeoBox->sortItems();
 
     ld->CountLabel->setText(
         i18np("One city matches search criteria", "%1 cities match search criteria", ld->GeoBox->count()));
 
     if (ld->GeoBox->count() > 0) // set first item in list as selected
         ld->GeoBox->setCurrentItem(ld->GeoBox->item(0));
 
     ld->MapView->repaint();
 }
 
 void LocationDialog::changeCity()
 {
     KStarsData *data = KStarsData::Instance();
     //when the selected city changes, set newCity, and redraw map
-    SelectedCity = 0L;
+    SelectedCity = nullptr;
     if (ld->GeoBox->currentItem())
     {
         for (int i = 0; i < filteredCityList.size(); ++i)
         {
             GeoLocation *loc = filteredCityList.at(i);
             if (loc->fullName() == ld->GeoBox->currentItem()->text())
             {
                 SelectedCity = loc;
                 break;
             }
         }
     }
 
     ld->MapView->repaint();
 
     //Fill the fields at the bottom of the window with the selected city's data.
     if (SelectedCity)
     {
         ld->NewCityName->setText(SelectedCity->translatedName());
         if (SelectedCity->province().isEmpty())
             ld->NewProvinceName->setText(QString());
         else
             ld->NewProvinceName->setText(SelectedCity->translatedProvince());
 
         ld->NewCountryName->setText(SelectedCity->translatedCountry());
         ld->NewLong->showInDegrees(SelectedCity->lng());
         ld->NewLat->showInDegrees(SelectedCity->lat());
         ld->TZBox->setEditText(QLocale().toString(SelectedCity->TZ0()));
 
         //Pick the City's rule from the rulebook
         for (int i = 0; i < ld->DSTRuleBox->count(); ++i)
         {
             TimeZoneRule tzr = data->getRulebook().value(ld->DSTRuleBox->itemText(i));
             if (tzr.equals(SelectedCity->tzrule()))
             {
                 ld->DSTRuleBox->setCurrentIndex(i);
                 break;
             }
         }
 
         ld->RemoveButton->setEnabled(SelectedCity->isReadOnly() == false);
     }
 
     nameModified = false;
     dataModified = false;
     ld->AddCityButton->setEnabled(false);
     ld->UpdateButton->setEnabled(false);
 }
 
 bool LocationDialog::addCity()
 {
     return updateCity(CITY_ADD);
 }
 
 bool LocationDialog::updateCity()
 {
     if (SelectedCity == nullptr)
         return false;
 
     return updateCity(CITY_UPDATE);
 }
 
 bool LocationDialog::removeCity()
 {
     if (SelectedCity == nullptr)
         return false;
 
     return updateCity(CITY_REMOVE);
 }
 
 bool LocationDialog::updateCity(CityOperation operation)
 {
     if (operation == CITY_REMOVE)
     {
         QString message = i18n("Are you sure you want to remove %1?", selectedCityName());
-        if (KMessageBox::questionYesNo(0, message, i18n("Remove City?")) == KMessageBox::No)
+        if (KMessageBox::questionYesNo(nullptr, message, i18n("Remove City?")) == KMessageBox::No)
             return false; //user answered No.
     }
     else if (!nameModified && !dataModified)
     {
         QString message = i18n("This city already exists in the database.");
-        KMessageBox::sorry(0, message, i18n("Error: Duplicate Entry"));
+        KMessageBox::sorry(nullptr, message, i18n("Error: Duplicate Entry"));
         return false;
     }
 
     bool latOk(false), lngOk(false), tzOk(false);
     dms lat                = ld->NewLat->createDms(true, &latOk);
     dms lng                = ld->NewLong->createDms(true, &lngOk);
     QString TimeZoneString = ld->TZBox->lineEdit()->text();
     TimeZoneString.replace(QLocale().decimalPoint(), ".");
     double TZ = TimeZoneString.toDouble(&tzOk);
 
     if (ld->NewCityName->text().isEmpty() || ld->NewCountryName->text().isEmpty())
     {
         QString message = i18n("All fields (except province) must be filled to add this location.");
-        KMessageBox::sorry(0, message, i18n("Fields are Empty"));
+        KMessageBox::sorry(nullptr, message, i18n("Fields are Empty"));
         return false;
     }
     else if (!latOk || !lngOk)
     {
         QString message = i18n("Could not parse the Latitude/Longitude.");
-        KMessageBox::sorry(0, message, i18n("Bad Coordinates"));
+        KMessageBox::sorry(nullptr, message, i18n("Bad Coordinates"));
         return false;
     }
     else if (!tzOk)
     {
         QString message = i18n("Could not parse coordinates.");
-        KMessageBox::sorry(0, message, i18n("Bad Coordinates"));
+        KMessageBox::sorry(nullptr, message, i18n("Bad Coordinates"));
         return false;
     }
 
     // If name is still the same then it's an update operation
     if (operation == CITY_ADD && !nameModified)
         operation = CITY_UPDATE;
 
     /*if ( !nameModified )
     {
         QString message = i18n( "Really override original data for this city?" );
         if ( KMessageBox::questionYesNo( 0, message, i18n( "Override Existing Data?" ), KGuiItem(i18n("Override Data")), KGuiItem(i18n("Do Not Override"))) == KMessageBox::No )
             return false; //user answered No.
     }*/
 
     QSqlDatabase mycitydb = QSqlDatabase::database("mycitydb");
     QString dbfile        = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "mycitydb.sqlite";
 
     // If it doesn't exist, create it
     if (QFile::exists(dbfile) == false)
     {
         mycitydb.setDatabaseName(dbfile);
         mycitydb.open();
         QSqlQuery create_query(mycitydb);
         QString query("CREATE TABLE city ( "
                       "id INTEGER DEFAULT NULL PRIMARY KEY AUTOINCREMENT, "
                       "Name TEXT DEFAULT NULL, "
                       "Province TEXT DEFAULT NULL, "
                       "Country TEXT DEFAULT NULL, "
                       "Latitude TEXT DEFAULT NULL, "
                       "Longitude TEXT DEFAULT NULL, "
                       "TZ REAL DEFAULT NULL, "
                       "TZRule TEXT DEFAULT NULL)");
         if (create_query.exec(query) == false)
         {
             qCWarning(KSTARS) << create_query.lastError();
             return false;
         }
     }
     else if (mycitydb.open() == false)
     {
         qCWarning(KSTARS) << mycitydb.lastError();
         return false;
     }
 
     //Strip off white space
     QString name     = ld->NewCityName->text().trimmed();
     QString province = ld->NewProvinceName->text().trimmed();
     QString country  = ld->NewCountryName->text().trimmed();
     QString TZrule   = ld->DSTRuleBox->currentText();
     GeoLocation *g   = nullptr;
 
     switch (operation)
     {
         case CITY_ADD:
         {
             QSqlQuery add_query(mycitydb);
             add_query.prepare("INSERT INTO city(Name, Province, Country, Latitude, Longitude, TZ, TZRule) "
                               "VALUES(:Name, :Province, :Country, :Latitude, :Longitude, :TZ, :TZRule)");
             add_query.bindValue(":Name", name);
             add_query.bindValue(":Province", province);
             add_query.bindValue(":Country", country);
             add_query.bindValue(":Latitude", lat.toDMSString());
             add_query.bindValue(":Longitude", lng.toDMSString());
             add_query.bindValue(":TZ", TZ);
             add_query.bindValue(":TZRule", TZrule);
             if (add_query.exec() == false)
             {
                 qCWarning(KSTARS) << add_query.lastError();
                 return false;
             }
 
             //Add city to geoList...don't need to insert it alphabetically, since we always sort GeoList
             g = new GeoLocation(lng, lat, name, province, country, TZ, &KStarsData::Instance()->Rulebook[TZrule]);
             KStarsData::Instance()->getGeoList().append(g);
         }
         break;
 
         case CITY_UPDATE:
         {
             g = SelectedCity;
 
             QSqlQuery update_query(mycitydb);
             update_query.prepare("UPDATE city SET Name = :newName, Province = :newProvince, Country = :newCountry, "
                                  "Latitude = :Latitude, Longitude = :Longitude, TZ = :TZ, TZRule = :TZRule WHERE "
                                  "Name = :Name AND Province = :Province AND Country = :Country");
             update_query.bindValue(":newName", name);
             update_query.bindValue(":newProvince", province);
             update_query.bindValue(":newCountry", country);
             update_query.bindValue(":Name", SelectedCity->name());
             update_query.bindValue(":Province", SelectedCity->province());
             update_query.bindValue(":Country", SelectedCity->country());
             update_query.bindValue(":Latitude", lat.toDMSString());
             update_query.bindValue(":Longitude", lng.toDMSString());
             update_query.bindValue(":TZ", TZ);
             update_query.bindValue(":TZRule", TZrule);
             if (update_query.exec() == false)
             {
                 qCWarning(KSTARS) << update_query.lastError() << endl;
                 return false;
             }
 
             g->setName(name);
             g->setProvince(province);
             g->setCountry(country);
             g->setLat(lat);
             g->setLong(lng);
             g->setTZ(TZ);
             g->setTZRule(&KStarsData::Instance()->Rulebook[TZrule]);
         }
         break;
 
         case CITY_REMOVE:
         {
             g = SelectedCity;
             QSqlQuery delete_query(mycitydb);
             delete_query.prepare("DELETE FROM city WHERE Name = :Name AND Province = :Province AND Country = :Country");
             delete_query.bindValue(":Name", name);
             delete_query.bindValue(":Province", province);
             delete_query.bindValue(":Country", country);
             if (delete_query.exec() == false)
             {
                 qCWarning(KSTARS) << delete_query.lastError() << endl;
                 return false;
             }
 
             filteredCityList.removeOne(g);
             KStarsData::Instance()->getGeoList().removeOne(g);
             delete g;
             g = nullptr;
         }
         break;
     }
 
     //(possibly) insert new city into GeoBox by running filterCity()
     filterCity();
 
     //Attempt to highlight new city in list
-    ld->GeoBox->setCurrentItem(0);
+    ld->GeoBox->setCurrentItem(nullptr);
     if (g && ld->GeoBox->count())
     {
         for (int i = 0; i < ld->GeoBox->count(); i++)
         {
             if (ld->GeoBox->item(i)->text() == g->fullName())
             {
                 ld->GeoBox->setCurrentRow(i);
                 break;
             }
         }
     }
 
     mycitydb.commit();
     mycitydb.close();
 
     return true;
 }
 
 void LocationDialog::findCitiesNear(int lng, int lat)
 {
     KStarsData *data = KStarsData::Instance();
     //find all cities within 3 degrees of (lng, lat); list them in GeoBox
     ld->GeoBox->clear();
     //Remember, do NOT delete members of filteredCityList
     while (!filteredCityList.isEmpty())
         filteredCityList.takeFirst();
 
     foreach (GeoLocation *loc, data->getGeoList())
     {
         if ((abs(lng - int(loc->lng()->Degrees())) < 3) && (abs(lat - int(loc->lat()->Degrees())) < 3))
         {
             ld->GeoBox->addItem(loc->fullName());
             filteredCityList.append(loc);
         }
     }
 
     ld->GeoBox->sortItems();
     ld->CountLabel->setText(
         i18np("One city matches search criteria", "%1 cities match search criteria", ld->GeoBox->count()));
 
     if (ld->GeoBox->count() > 0) // set first item in list as selected
         ld->GeoBox->setCurrentItem(ld->GeoBox->item(0));
 
     repaint();
 }
 
 bool LocationDialog::checkLongLat()
 {
     if (ld->NewLong->text().isEmpty() || ld->NewLat->text().isEmpty())
         return false;
 
     bool ok;
     double lng = ld->NewLong->createDms(true, &ok).Degrees();
     if (!ok)
         return false;
     double lat = ld->NewLat->createDms(true, &ok).Degrees();
     if (!ok)
         return false;
 
     if (fabs(lng) > 180 || fabs(lat) > 90)
         return false;
 
     return true;
 }
 
 void LocationDialog::clearFields()
 {
     ld->CityFilter->clear();
     ld->ProvinceFilter->clear();
     ld->CountryFilter->clear();
     ld->NewCityName->clear();
     ld->NewProvinceName->clear();
     ld->NewCountryName->clear();
     ld->NewLong->clearFields();
     ld->NewLat->clearFields();
     ld->TZBox->lineEdit()->setText(QLocale().toString(0.0));
     ld->DSTRuleBox->setCurrentIndex(0);
     nameModified = true;
     dataModified = false;
     ld->AddCityButton->setEnabled(false);
     ld->UpdateButton->setEnabled(false);
     ld->NewCityName->setFocus();
 }
 
 void LocationDialog::showTZRules()
 {
     QStringList lines;
     lines.append(i18n(" Start Date (Start Time)  /  Revert Date (Revert Time)"));
     lines.append(" ");
     lines.append(i18n("--: No DST correction"));
     lines.append(i18n("AU: last Sun in Oct. (02:00) / last Sun in Mar. (02:00)"));
     lines.append(i18n("BZ:  2nd Sun in Oct. (00:00) /  3rd Sun in Feb. (00:00)"));
     lines.append(i18n("CH:  2nd Sun in Apr. (00:00) /  2nd Sun in Sep. (00:00)"));
     lines.append(i18n("CL:  2nd Sun in Oct. (04:00) /  2nd Sun in Mar. (04:00)"));
     lines.append(i18n("CZ:  1st Sun in Oct. (02:45) /  3rd Sun in Mar. (02:45)"));
     lines.append(i18n("EE: Last Sun in Mar. (00:00) / Last Sun in Oct. (02:00)"));
     lines.append(i18n("EG: Last Fri in Apr. (00:00) / Last Thu in Sep. (00:00)"));
     lines.append(i18n("EU: Last Sun in Mar. (01:00) / Last Sun in Oct. (01:00)"));
     lines.append(i18n("FK:  1st Sun in Sep. (02:00) /  3rd Sun in Apr. (02:00)"));
     lines.append(i18n("HK:  2nd Sun in May  (03:30) /  3rd Sun in Oct. (03:30)"));
     lines.append(i18n("IQ: Apr 1 (03:00) / Oct. 1 (00:00)"));
     lines.append(i18n("IR: Mar 21 (00:00) / Sep. 22 (00:00)"));
     lines.append(i18n("JD: Last Thu in Mar. (00:00) / Last Thu in Sep. (00:00)"));
     lines.append(i18n("LB: Last Sun in Mar. (00:00) / Last Sun in Oct. (00:00)"));
     lines.append(i18n("MX:  1st Sun in May  (02:00) / Last Sun in Sep. (02:00)"));
     lines.append(i18n("NB:  1st Sun in Sep. (02:00) /  1st Sun in Apr. (02:00)"));
     lines.append(i18n("NZ:  1st Sun in Oct. (02:00) /  3rd Sun in Mar. (02:00)"));
     lines.append(i18n("PY:  1st Sun in Oct. (00:00) /  1st Sun in Mar. (00:00)"));
     lines.append(i18n("RU: Last Sun in Mar. (02:00) / Last Sun in Oct. (02:00)"));
     lines.append(i18n("SK:  2nd Sun in May  (00:00) /  2nd Sun in Oct. (00:00)"));
     lines.append(i18n("SY: Apr. 1 (00:00) / Oct. 1 (00:00)"));
     lines.append(i18n("TG:  1st Sun in Nov. (02:00) / Last Sun in Jan. (02:00)"));
     lines.append(i18n("TS:  1st Sun in Oct. (02:00) / Last Sun in Mar. (02:00)"));
     lines.append(i18n("US:  1st Sun in Apr. (02:00) / Last Sun in Oct. (02:00)"));
     lines.append(i18n("ZN: Apr. 1 (01:00) / Oct. 1 (00:00)"));
 
     QString message = i18n("Daylight Saving Time Rules");
 
     QPointer<QDialog> tzd = new QDialog(this);
     tzd->setWindowTitle(message);
 
     QListWidget *lw = new QListWidget(tzd);
     lw->addItems(lines);
     //This is pretty lame...I have to measure the width of the first item in the
     //list widget, in order to set its width properly.  Why doesn't it just resize
     //the widget to fit the contents automatically?  I tried setting the sizePolicy,
     //no joy...
     int w = int(1.1 * lw->visualItemRect(lw->item(0)).width());
     lw->setMinimumWidth(w);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(lw);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), tzd, SLOT(reject()));
 
     tzd->setLayout(mainLayout);
 
     tzd->exec();
 
     delete tzd;
 }
 
 void LocationDialog::nameChanged()
 {
     nameModified = true;
     dataChanged();
 }
 
 //do not enable Add button until all data are present and valid.
 void LocationDialog::dataChanged()
 {
     dataModified = true;
     ld->AddCityButton->setEnabled(nameModified && !ld->NewCityName->text().isEmpty() &&
                                   !ld->NewCountryName->text().isEmpty() && checkLongLat());
     if (SelectedCity)
         ld->UpdateButton->setEnabled(SelectedCity->isReadOnly() == false && !ld->NewCityName->text().isEmpty() &&
                                      !ld->NewCountryName->text().isEmpty() && checkLongLat());
 
     if (!addCityEnabled())
     {
         if (ld->NewCityName->text().isEmpty())
         {
             ld->errorLabel->setText(i18n("Cannot add new location -- city name blank"));
         }
         else if (ld->NewCountryName->text().isEmpty())
         {
             ld->errorLabel->setText(i18n("Cannot add new location -- country name blank"));
         }
         else if (!checkLongLat())
         {
             ld->errorLabel->setText(i18n("Cannot add new location -- invalid latitude / longitude"));
         }
         else
         {
             ld->errorLabel->setText(i18n("Cannot add new location -- please check all fields"));
         }
     }
     else
     {
         ld->errorLabel->setText(QString());
     }
 }
 
 void LocationDialog::slotOk()
 {
     if (addCityEnabled())
     {
         if (addCity())
             accept();
     }
     else
         accept();
 }
 
 bool LocationDialog::addCityEnabled()
 {
     return ld->AddCityButton->isEnabled();
 }
 
 // FIXME Disable this until Qt5 works with Geoclue2
 #ifdef HAVE_GEOCLUE_2
 void LocationDialog::getNameFromCoordinates(double latitude, double longitude)
 {
     QString lat = QString::number(latitude);
     QString lon = QString::number(longitude);
     QString latlng(lat + ", " + lon);
 
     QUrl url("http://maps.googleapis.com/maps/api/geocode/json");
     QUrlQuery query;
     query.addQueryItem("latlng", latlng);
     url.setQuery(query);
     qDebug() << "submitting request";
 
     nam->get(QNetworkRequest(url));
     connect(nam, SIGNAL(finished(QNetworkReply *)), this, SLOT(processLocationNameData(QNetworkReply *)));
 }
 
 void LocationDialog::processLocationNameData(QNetworkReply *networkReply)
 {
     if (!networkReply)
         return;
 
     if (!networkReply->error())
     {
         QJsonDocument document = QJsonDocument::fromJson(networkReply->readAll());
 
         if (document.isObject())
         {
             QJsonObject obj = document.object();
             QJsonValue val;
 
             if (obj.contains(QStringLiteral("results")))
             {
                 val = obj["results"];
 
                 QString city =
                     val.toArray()[0].toObject()["address_components"].toArray()[2].toObject()["long_name"].toString();
                 QString region =
                     val.toArray()[0].toObject()["address_components"].toArray()[3].toObject()["long_name"].toString();
                 QString country =
                     val.toArray()[0].toObject()["address_components"].toArray()[4].toObject()["long_name"].toString();
 
                 //emit newNameFromCoordinates(city, region, country);
             }
             else
             {
             }
         }
     }
     networkReply->deleteLater();
 }
 
 void LocationDialog::requestUpdate()
 {
     source->requestUpdate(15000);
 }
 
 void LocationDialog::positionUpdated(const QGeoPositionInfo &info)
 {
         qDebug() << "Position updated:" << info;
 }
 
 void LocationDialog::positionUpdateError(QGeoPositionInfoSource::Error error)
 {
     qDebug() << "Positon update error: " << error;
 }
 
 void LocationDialog::positionUpdateTimeout()
 {
     qDebug() << "Timed out!";
     qDebug() << source->error();
 }
 #endif
diff --git a/kstars/dialogs/locationdialog.h b/kstars/dialogs/locationdialog.h
index af0cc9ed3..633d66221 100644
--- a/kstars/dialogs/locationdialog.h
+++ b/kstars/dialogs/locationdialog.h
@@ -1,207 +1,207 @@
 /***************************************************************************
                           locationdialog.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 11 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "geolocation.h"
 #include "ui_locationdialog.h"
 
 #include <QPointer>
 #ifdef HAVE_GEOCLUE2
 #include <QGeoPositionInfo>
 #include <QGeoPositionInfoSource>
 #endif
 #include <QDialog>
 #include <QList>
 
 class QTimer;
 class QNetworkAccessManager;
 class QNetworkReply;
 
 class LocationDialogUI : public QFrame, public Ui::LocationDialog
 {
     Q_OBJECT
   public:
-    explicit LocationDialogUI(QWidget *parent = 0);
+    explicit LocationDialogUI(QWidget *parent = nullptr);
 };
 
 /**
  * @class LocationDialog
  * Dialog for changing the geographic location of the observer.  The
  * dialog is divided into two sections.
  *
  * The top section allows the location to be selected from a database
  * of 2000 cities.  It contains a MapCanvas (showing map of the globe
  * with cities overlaid, with a handler for mouse clicks), a QListBox
  * containing the names of cities in the database, and three QLineEdit
  * widgets, which allow the user to filter the List by the name of the
  * City, Province, and Country.  In addition, the List
  * can be filtered by location, by clicking anywhere in the MapCanvas.
  * Doing so will display cities within 2 degrees of the clicked position.
  *
  * The bottom section allows the location to be specified manually.
  * The Longitude, Latitude, City name, Province/State name, and Country name
  * are entered into KLineEdits.  There is also a QPushButton for adding the
  * location to the custom Cities database.  If the user selects "Add" without
  * filling in all of the manual entry fields, an error message is displayed.
  *
  * The user can fetch current geographic location from QtPosition system. The actual
  * underlying location source depends on the OS and what modules are currently available, if any.
  *
  * @short Geographic Location dialog
  * @author Jason Harris
  * @author Jasem Mutlaq
  * @author Artem Fedoskin
  * @version 1.1
  */
 class LocationDialog : public QDialog
 {
     Q_OBJECT
 
   public:
     typedef enum { CITY_ADD, CITY_UPDATE, CITY_REMOVE } CityOperation;
 
     /**
      * Constructor.  Create all widgets, and pack them into QLayouts.
      * Connect Signals to Slots.  Run initCityList().
      */
     explicit LocationDialog(QWidget *parent);
 
     /**
      * Initialize list of cities.  Note that the database is not read in here,
      * that is done in the KStars constructor.  This simply loads the local QListBox
      * with the names of the cities from the kstarsData object.
      */
     void initCityList(void);
 
     /** @return pointer to the highlighted city in the List. */
     GeoLocation *selectedCity() const { return SelectedCity; }
 
     /** @return pointer to the List of filtered city pointers. */
     QList<GeoLocation *> filteredList() { return filteredCityList; }
 
     /**
      * @short Show only cities within 3 degrees of point specified by arguments
      * @param longitude the longitude of the search point (int)
      * @param latitude the latitude of the search point (int)
      */
     void findCitiesNear(int longitude, int latitude);
 
     /** @return the city name of the selected location. */
     QString selectedCityName() const { return SelectedCity->translatedName(); }
 
     /** @return the province name of the selected location. */
     QString selectedProvinceName() const { return SelectedCity->translatedProvince(); }
 
     /** @return the country name of the selected location. */
     QString selectedCountryName() const { return SelectedCity->translatedCountry(); }
 
     /** @return true if the AddCityBUtton is enabled */
     bool addCityEnabled();
 
   public slots:
     /**
      * When text is entered in the City/Province/Country Filter KLineEdits, the List of cities is
      * trimmed to show only cities beginning with the entered text.  Also, the QMemArray of ID
      * numbers is kept in sync with the filtered list.
      */
     void filterCity();
 
     /**
      * @short Filter by city / province / country only after a few milliseconds
      */
     void enqueueFilterCity();
 
     /**
      * When the selected city in the QListBox changes, repaint the MapCanvas
      * so that the crosshairs icon appears on the newly selected city.
      */
     void changeCity();
 
     /**
      * When the "Add new city" QPushButton is clicked, add the manually-entered
      * city information to the user's custom city database.
      * @return true on success
      */
     bool addCity();
 
     /**
      * When the "Update City" QPushButton is clicked, update the city
      * information in the user's custom city database.
      * @return true on success
      */
     bool updateCity();
 
     /**
      * When the "Remove City" QPushButton is clicked, remove the
      * city information from the user's custom city database.
      * @return true on success
      */
     bool removeCity();
 
     /**
      * @brief updateCity Adds, updates, or removes a city from the user's database.
      * @param operation Add, update, or remove city
      * @return true on success
      */
     bool updateCity(CityOperation operation);
 
     /**
      * @brief getNameFromCoordinates Given the current latitude and longitude, use Google Location API services to reverse lookup
      * the city, province, and country located at the requested position.
      * @param latitude Latitude in degrees
      * @param longitude Longitude is degrees
      */
     // FIXME Disable this until Qt5 works with Geoclue2
     #ifdef HAVE_GEOCLUE_2
     void getNameFromCoordinates(double latitude, double longitude);
     #endif
 
     void clearFields();
     void showTZRules();
     void nameChanged();
     void dataChanged();
     void slotOk();
 
 protected slots:
     // FIXME Disable this until Qt5 works with Geoclue2
     #ifdef HAVE_GEOCLUE_2
     void processLocationNameData(QNetworkReply *rep);
     void requestUpdate();
     void positionUpdated(const QGeoPositionInfo &info);
     void positionUpdateError(QGeoPositionInfoSource::Error error);
     void positionUpdateTimeout();
     #endif
 
   private:
     /** Make sure Longitude and Latitude values are valid. */
     bool checkLongLat();
 
     bool dataModified { false };
     bool nameModified { false };
 
     LocationDialogUI *ld { nullptr };
     GeoLocation *SelectedCity { nullptr };
     QList<GeoLocation *> filteredCityList;
     QTimer *timer { nullptr };
     //Retrieve the name of city
 
     #ifdef HAVE_GEOCLUE_2
     QNetworkAccessManager *nam { nullptr };
     QPointer<QGeoPositionInfoSource> source;
     #endif
 };
diff --git a/kstars/dialogs/timedialog.cpp b/kstars/dialogs/timedialog.cpp
index 82c26ac2c..ba9eefb49 100644
--- a/kstars/dialogs/timedialog.cpp
+++ b/kstars/dialogs/timedialog.cpp
@@ -1,126 +1,126 @@
 /***************************************************************************
                           timedialog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 11 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "timedialog.h"
 
 #include <KLocalizedString>
 #include <QPushButton>
 #include <KDatePicker>
 
 #include <QFrame>
 #include <QVBoxLayout>
 #include <QHBoxLayout>
 #include <QKeyEvent>
 #include <QTimeEdit>
 
 #include "kstarsdatetime.h"
 #include "kstarsdata.h"
 #include "simclock.h"
 #include "geolocation.h"
 
 TimeDialog::TimeDialog(const KStarsDateTime &now, GeoLocation *_geo, QWidget *parent, bool UTCFrame)
     : QDialog(parent), geo(_geo)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     UTCNow = UTCFrame;
 
     QFrame *page = new QFrame(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(page);
     setLayout(mainLayout);
 
     if (UTCNow)
         setWindowTitle(i18nc("set clock to a new time", "Set UTC Time"));
     else
         setWindowTitle(i18nc("set clock to a new time", "Set Time"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     vlay = new QVBoxLayout(page);
     vlay->setMargin(2);
     vlay->setSpacing(2);
     hlay = new QHBoxLayout(); //this layout will be added to the VLayout
     hlay->setSpacing(2);
 
     dPicker   = new KDatePicker(now.date(), page);
     tEdit     = new QTimeEdit(now.time(), page);
     NowButton = new QPushButton(page);
     NowButton->setObjectName("NowButton");
     NowButton->setText(UTCNow ? i18n("UTC Now") : i18n("Now"));
 
-    vlay->addWidget(dPicker, 0, 0);
+    vlay->addWidget(dPicker, 0, nullptr);
     vlay->addLayout(hlay, 0);
 
     hlay->addWidget(tEdit);
     hlay->addWidget(NowButton);
 
     vlay->activate();
 
     QObject::connect(NowButton, SIGNAL(clicked()), this, SLOT(setNow()));
 }
 
 //Add handler for Escape key to close window
 //Use keyReleaseEvent because keyPressEvents are already consumed
 //by the KDatePicker.
 void TimeDialog::keyReleaseEvent(QKeyEvent *kev)
 {
     switch (kev->key())
     {
         case Qt::Key_Escape:
         {
             close();
             break;
         }
 
         default:
         {
             kev->ignore();
             break;
         }
     }
 }
 
 void TimeDialog::setNow(void)
 {
     KStarsDateTime dt(KStarsDateTime::currentDateTimeUtc());
     if (!UTCNow)
         dt = geo->UTtoLT(dt);
 
     dPicker->setDate(dt.date());
     tEdit->setTime(dt.time());
 }
 
 QTime TimeDialog::selectedTime(void)
 {
     return tEdit->time();
 }
 
 QDate TimeDialog::selectedDate(void)
 {
     return dPicker->date();
 }
 
 KStarsDateTime TimeDialog::selectedDateTime(void)
 {
     return KStarsDateTime(selectedDate(), selectedTime());
 }
diff --git a/kstars/htmesh/HTMesh.cpp b/kstars/htmesh/HTMesh.cpp
index fd2a6d48f..40109688d 100644
--- a/kstars/htmesh/HTMesh.cpp
+++ b/kstars/htmesh/HTMesh.cpp
@@ -1,279 +1,279 @@
 #include <cstdlib>
 #include <iostream>
 
 #include "HTMesh.h"
 #include "MeshBuffer.h"
 #include "MeshIterator.h"
 
 #include "SpatialVector.h"
 #include "SpatialIndex.h"
 #include "RangeConvex.h"
 #include "HtmRange.h"
 #include "HtmRangeIterator.h"
 
 /******************************************************************************
  * Note: There is "complete" checking for duplicate points in the line and
  * polygon intersection routines below.  This may have a slight performance
  * impact on indexing lines and polygons.
  *
  * -- James B. Bowlin
  *****************************************************************************/
 
 HTMesh::HTMesh(int level, int buildLevel, int numBuffers)
     : m_level(level), m_buildLevel(buildLevel), m_numBuffers(numBuffers), htmDebug(0)
 {
     name = "HTMesh";
     if (m_buildLevel > 0)
     {
         if (m_buildLevel > m_level)
             m_buildLevel = m_level;
         htm = new SpatialIndex(m_level, m_buildLevel);
     }
     else
     {
         htm = new SpatialIndex(m_level);
     }
 
     edge       = 2. / 3.14; //  inverse of roughly 1/4 circle
     numTrixels = 8;
     for (int i = m_level; i--;)
     {
         numTrixels *= 4;
         edge *= 2.0;
     }
     edge   = 1.0 / edge; // roughly length of one edge (radians)
     edge10 = edge / 10.0;
     eps    = 1.0e-6; // arbitrary small number
 
     magicNum   = numTrixels;
     degree2Rad = 3.1415926535897932385E0 / 180.0;
 
     // Allocate MeshBuffers
     m_meshBuffer = (MeshBuffer **)malloc(sizeof(MeshBuffer *) * numBuffers);
     if (m_meshBuffer == nullptr)
     {
         fprintf(stderr, "Out of memory allocating %d MeshBuffers.\n", numBuffers);
         exit(0);
     }
     for (int i = 0; i < numBuffers; i++)
     {
         m_meshBuffer[i] = new MeshBuffer(this);
     }
 }
 
 HTMesh::~HTMesh()
 {
     delete htm;
     for (BufNum i = 0; i < m_numBuffers; i++)
         delete m_meshBuffer[i];
     free(m_meshBuffer);
 }
 
 Trixel HTMesh::index(double ra, double dec) const
 {
     return (Trixel)htm->idByPoint(SpatialVector(ra, dec)) - magicNum;
 }
 
 bool HTMesh::performIntersection(RangeConvex *convex, BufNum bufNum)
 {
     if (!validBufNum(bufNum))
         return false;
 
     convex->setOlevel(m_level);
     HtmRange range;
     convex->intersect(htm, &range);
     HtmRangeIterator iterator(&range);
 
     MeshBuffer *buffer = m_meshBuffer[bufNum];
     buffer->reset();
     while (iterator.hasNext())
     {
         buffer->append((Trixel)iterator.next() - magicNum);
     }
 
     if (buffer->error())
     {
         fprintf(stderr, "%s: trixel overflow.\n", name);
         return false;
     };
 
     return true;
 }
 
 // CIRCLE
 void HTMesh::intersect(double ra, double dec, double radius, BufNum bufNum)
 {
     double d = cos(radius * degree2Rad);
     SpatialConstraint c(SpatialVector(ra, dec), d);
     RangeConvex convex;
     convex.add(c); // [ed:RangeConvex::add]
 
     if (!performIntersection(&convex, bufNum))
         printf("In intersect(%f, %f, %f)\n", ra, dec, radius);
 }
 
 // TRIANGLE
 void HTMesh::intersect(double ra1, double dec1, double ra2, double dec2, double ra3, double dec3, BufNum bufNum)
 {
     if (fabs(ra1 - ra3) + fabs(dec1 - dec3) < eps)
         return intersect(ra1, dec1, ra2, dec2);
 
     else if (fabs(ra1 - ra2) + fabs(dec1 - dec2) < eps)
         return intersect(ra1, dec1, ra3, dec3);
 
     else if (fabs(ra2 - ra3) + fabs(dec2 - dec3) < eps)
         return intersect(ra1, dec1, ra2, dec2);
 
     SpatialVector p1(ra1, dec1);
     SpatialVector p2(ra2, dec2);
     SpatialVector p3(ra3, dec3);
     RangeConvex convex(&p1, &p2, &p3);
 
     if (!performIntersection(&convex, bufNum))
         printf("In intersect(%f, %f, %f, %f, %f, %f)\n", ra1, dec1, ra2, dec2, ra3, dec3);
 }
 
 // QUADRILATERAL
 void HTMesh::intersect(double ra1, double dec1, double ra2, double dec2, double ra3, double dec3, double ra4,
                        double dec4, BufNum bufNum)
 {
     if (fabs(ra1 - ra4) + fabs(dec1 - dec4) < eps)
         return intersect(ra2, dec2, ra3, dec3, ra4, dec4);
 
     else if (fabs(ra1 - ra2) + fabs(dec1 - dec2) < eps)
         return intersect(ra2, dec2, ra3, dec3, ra4, dec4);
 
     else if (fabs(ra2 - ra3) + fabs(dec2 - dec3) < eps)
         return intersect(ra1, dec1, ra2, dec2, ra4, dec4);
 
     else if (fabs(ra3 - ra4) + fabs(dec3 - dec4) < eps)
         return intersect(ra1, dec1, ra2, dec2, ra4, dec4);
 
     SpatialVector p1(ra1, dec1);
     SpatialVector p2(ra2, dec2);
     SpatialVector p3(ra3, dec3);
     SpatialVector p4(ra4, dec4);
     RangeConvex convex(&p1, &p2, &p3, &p4);
 
     if (!performIntersection(&convex, bufNum))
         printf("In intersect(%f, %f, %f, %f, %f, %f, %f, %f)\n", ra1, dec1, ra2, dec2, ra3, dec3, ra4, dec4);
 }
 
 void HTMesh::toXYZ(double ra, double dec, double *x, double *y, double *z)
 {
     ra *= degree2Rad;
     dec *= degree2Rad;
 
     double sinRa  = sin(ra);
     double cosRa  = cos(ra);
     double sinDec = sin(dec);
     double cosDec = cos(dec);
 
     *x = cosDec * cosRa;
     *y = cosDec * sinRa;
     *z = sinDec;
 }
 
 // Intersect a line segment by forming a very thin triangle to use for the
 // intersection.  Use cross product to ensure we have a perpendicular vector.
 
 // LINE
 void HTMesh::intersect(double ra1, double dec1, double ra2, double dec2, BufNum bufNum)
 {
     double x1, y1, z1, x2, y2, z2;
 
     //if (ra1 == 0.0 || ra1 == 180.00) ra1 += 0.1;
     //if (ra2 == 0.0 || ra2 == 180.00) ra2 -= 0.1;
     //if (dec1 == 0.0 ) dec1 += 0.1;
     //if (dec2 == 0.0 ) dec2 -= 0.1;
 
     // convert to Cartesian. Ugh.
     toXYZ(ra1, dec1, &x1, &y1, &z1);
     toXYZ(ra2, dec2, &x2, &y2, &z2);
 
     // Check if points are too close
     double len;
     len = fabs(x1 - x2);
     len += fabs(y1 - y2);
     len += fabs(z1 - z2);
 
     if (htmDebug > 0)
     {
         printf("htmDebug = %d\n", htmDebug);
         printf("p1 = (%f, %f, %f)\n", x1, y1, z1);
         printf("p2 = (%f, %f, %f)\n", x2, y2, z2);
         printf("edge: %f (radians) %f (degrees)\n", edge, edge / degree2Rad);
         printf("len : %f (radians) %f (degrees)\n", len, len / degree2Rad);
     }
 
     if (len < edge10)
         return intersect(ra1, len, bufNum);
 
     // Cartesian cross product => perpendicular!.  Ugh.
     double cx = y1 * z2 - z1 * y2;
     double cy = z1 * x2 - x1 * z2;
     double cz = x1 * y2 - y1 * x2;
 
     if (htmDebug > 0)
         printf("cp  = (%f, %f, %f)\n", cx, cy, cz);
 
     double norm = edge10 / (fabs(cx) + fabs(cy) + fabs(cz));
 
     // give it length edge/10
     cx *= norm;
     cy *= norm;
     cz *= norm;
 
     if (htmDebug > 0)
         printf("cpn  = (%f, %f, %f)\n", cx, cy, cz);
 
     // add it to (ra1, dec1)
     cx += x1;
     cy += y1;
     cz += z1;
 
     if (htmDebug > 0)
         printf("cpf  = (%f, %f, %f)\n", cx, cy, cz);
 
     // back to spherical
     norm        = sqrt(cx * cx + cy * cy + cz * cz);
     double ra0  = atan2(cy, cx) / degree2Rad;
     double dec0 = asin(cz / norm) / degree2Rad;
 
     if (htmDebug > 0)
         printf("new ra, dec = (%f, %f)\n", ra0, dec0);
 
     SpatialVector p1(ra1, dec1);
     SpatialVector p0(ra0, dec0);
     SpatialVector p2(ra2, dec2);
     RangeConvex convex(&p1, &p0, &p2);
 
     if (!performIntersection(&convex, bufNum))
         printf("In intersect(%f, %f, %f, %f)\n", ra1, dec1, ra2, dec2);
 }
 
 MeshBuffer *HTMesh::meshBuffer(BufNum bufNum)
 {
     if (!validBufNum(bufNum))
-        return 0;
+        return nullptr;
     return m_meshBuffer[bufNum];
 }
 
 int HTMesh::intersectSize(BufNum bufNum)
 {
     if (!validBufNum(bufNum))
         return 0;
     return m_meshBuffer[bufNum]->size();
 }
 
 void HTMesh::vertices(Trixel id, double *ra1, double *dec1, double *ra2, double *dec2, double *ra3, double *dec3)
 {
     SpatialVector v1, v2, v3;
     htm->nodeVertex(id + magicNum, v1, v2, v3);
     *ra1  = v1.ra();
     *dec1 = v1.dec();
     *ra2  = v2.ra();
     *dec2 = v2.dec();
     *ra3  = v3.ra();
     *dec3 = v3.dec();
 }
diff --git a/kstars/htmesh/HtmRangeIterator.h b/kstars/htmesh/HtmRangeIterator.h
index a4741e0b1..6263a5244 100644
--- a/kstars/htmesh/HtmRangeIterator.h
+++ b/kstars/htmesh/HtmRangeIterator.h
@@ -1,31 +1,31 @@
 #ifndef _HTMHANGEITERATOR_H_
 #define _HTMHANGEITERATOR_H_
 
 #include <HtmRange.h>
 
 class HtmRangeIterator
 {
   public:
     Key next();
     char *nextSymbolic(char *buffer); /* User responsible for managing it */
     bool hasNext();
     HtmRangeIterator(HtmRange *ran)
     {
         range = ran;
         range->reset();
         range->getNext(&currange[0], &currange[1]);
         nextval = currange[0] - 1;
         getNext();
     }
 
   protected:
     HtmRange *range;
     void getNext();
 
   private:
     Key nextval;
     Key currange[2]; /* Low and High */
-    HtmRangeIterator() : range(0), nextval(-1) {}
+    HtmRangeIterator() : range(nullptr), nextval(-1) {}
 };
 
 #endif
diff --git a/kstars/htmesh/SkipList.cpp b/kstars/htmesh/SkipList.cpp
index 0de7c519d..076ad1e6a 100644
--- a/kstars/htmesh/SkipList.cpp
+++ b/kstars/htmesh/SkipList.cpp
@@ -1,332 +1,332 @@
 /*
   File: SkipList.C
   Author: Bruno Grossniklaus, 13.11.97
   Mod:    Gyorgy Fekete, Oct-09-2002
   Version: 1.0
   History:
   Nov-13-1997; Gro; Version 1.0
   Oct-09-2002; JHU; Version 1.1
 
 */
 
 #include <iostream> // cout
 #include <iomanip>  // setw
 #include <cstdlib>  // rand(), drand48()
 
 #include "SkipListElement.h"
 #include "SkipList.h"
 
 #include <config-htmesh.h>
 
 #ifndef HAVE_DRAND48
 double drand48()
 {
     double result;
 #ifdef _WIN32
     result = static_cast<double>(rand());
     result /= RAND_MAX;
 #else
     result = static_cast<double>(random());
     result /= LONG_MAX;
 #endif
     return result;
 }
 #endif /* HAVE_DRAND48 */
 
 ////////////////////////////////////////////////////////////////////////////////
 // get new element level using given probability
 ////////////////////////////////////////////////////////////////////////////////
 long getNewLevel(long maxLevel, float probability)
 {
     long newLevel = 0;
     while ((newLevel < maxLevel - 1) && (drand48() < probability)) // fast hack. fix later
         newLevel++;
     return (newLevel);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 SkipList::SkipList(float probability) : myProbability(probability)
 {
     myHeader = new SkipListElement(); // get memory for header element
     myHeader->setKey(KEY_MAX);
     myLength = 0;
     iter     = myHeader;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 SkipList::~SkipList()
 {
     delete myHeader; // free memory for header element
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 void SkipList::insert(const Key searchKey, const Value value)
 {
     int i;
     long newLevel;
     SkipListElement *element;
     SkipListElement *nextElement;
     SkipListElement update(SKIPLIST_MAXLEVEL);
 
     // scan all levels while key < searchKey
     // starting with header in his level
     element = myHeader;
     for (i = myHeader->getLevel(); i >= 0; i--)
     {
         nextElement = element->getElement(i);
         while ((nextElement != NIL) && (nextElement->getKey() < searchKey))
         {
             element     = nextElement;
             nextElement = element->getElement(i);
         }
         // save level pointer
         update.setElement(i, element);
     }
 
     // key is < searchKey
     element = element->getElement(0);
 
     if ((element != NIL) && (element->getKey() == searchKey))
     {
         // key exists. set new value
         element->setValue(value);
     }
     else
     {
         // new key. add to list
         // get new level and fix list level
 
         // get new level
         newLevel = getNewLevel(SKIPLIST_MAXLEVEL, myProbability);
         if (newLevel > myHeader->getLevel())
         {
             // adjust header level
             for (i = myHeader->getLevel() + 1; i <= newLevel; i++)
             {
                 // adjust new pointer of new element
                 update.setElement(i, myHeader);
             }
             // set new header level
             myHeader->setLevel(newLevel);
         }
         // make new element [NEW *******]
         myLength++;
         element = new SkipListElement(newLevel, searchKey, value);
         for (i = 0; i <= newLevel; i++) // scan all levels
         {
             // set next pointer of new element
             element->setElement(i, update.getElement(i)->getElement(i));
             update.getElement(i)->setElement(i, element);
         }
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // greatest key less than searchKey.. almost completely, but not
 // quite entirely unlike a search ...
 Key SkipList::findMAX(const Key searchKey) const
 {
     int i;
     SkipListElement *element;
     SkipListElement *nextElement;
     Key retKey;
 
     element = myHeader;
     for (i = myHeader->getLevel(); i >= 0; i--)
     {
         nextElement = element->getElement(i);
         while ((nextElement != NIL) && (nextElement->getKey() < searchKey))
         {
             element     = nextElement;
             nextElement = element->getElement(i);
         }
     }
     // now nextElement is >= searhcKey
     // and element is < searchKey
     // therefore elemnt  key is largest key less than current
 
     // if this were search:
     // element=element->getElement(0); // skip to >=
     if (element != NIL)
     {
         retKey = element->getKey();
         return retKey == KEY_MAX ? (-KEY_MAX) : retKey;
     }
     else
     {
         return ((Key)KEY_MAX);
     }
 }
 
 // smallest greater than searchKey.. almost completely, but not
 // quite entirely unlike a search ...
 Key SkipList::findMIN(const Key searchKey) const
 {
     int i;
     SkipListElement *element(myHeader);
-    SkipListElement *nextElement = 0;
+    SkipListElement *nextElement = nullptr;
     Key retKey;
 
     for (i = myHeader->getLevel(); i >= 0; i--)
     {
         nextElement = element->getElement(i);
         while ((nextElement != NIL) && (nextElement->getKey() <= searchKey))
         {
             element     = nextElement;
             nextElement = element->getElement(i);
         }
     }
     // now nextElement is > searchKey
     // element is <= , make it >
     //
     element = nextElement;
     if (element != NIL)
     {
         retKey = element->getKey();
         return retKey == KEY_MAX ? (-KEY_MAX) : retKey;
     }
     else
     {
         return (Key)KEY_MAX;
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 /* Very similar to free, but frees a range of keys
    from lo to hi, inclusive */
 void SkipList::freeRange(const Key loKey, const Key hiKey)
 {
     int i;
     SkipListElement *element;
     SkipListElement *nextElement;
 
     // scan all levels while key < searchKey
     // starting with header in his level
     element = myHeader;
     for (i = myHeader->getLevel(); i >= 0; i--)
     {
         nextElement = element->getElement(i);
         while ((nextElement != NIL) && (nextElement->getKey() < loKey))
         {
             element     = nextElement;
             nextElement = element->getElement(i);
         }
     }
     // key is < loKey
     element = element->getElement(0);
 
     while ((element != NIL) && (element->getKey() <= hiKey))
     {
         nextElement = element->getElement(0);
         free(element->getKey());
         element = nextElement;
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 void SkipList::free(const Key searchKey)
 {
     int i;
     SkipListElement *element;
     SkipListElement *nextElement;
     SkipListElement update(SKIPLIST_MAXLEVEL);
 
     // scan all levels while key < searchKey
     // starting with header in his level
     element = myHeader;
     for (i = myHeader->getLevel(); i >= 0; i--)
     {
         nextElement = element->getElement(i);
         while ((nextElement != NIL) && (nextElement->getKey() < searchKey))
         {
             element     = nextElement;
             nextElement = element->getElement(i);
         }
         // save level pointer
         update.setElement(i, element);
     }
 
     // key is < searchKey
     element = element->getElement(0);
 
     // if key exists
     if ((element != NIL) && (element->getKey() == searchKey))
     {
         for (i = 0; i <= myHeader->getLevel(); i++) // save next pointers
         {
             if (update.getElement(i)->getElement(i) == element)
             {
                 update.getElement(i)->setElement(i, element->getElement(i));
             }
         }
 
         // free memory of element
         delete element;
         myLength--;
 
         // set new header level
         while ((myHeader->getLevel() > 0) && (myHeader->getElement(myHeader->getLevel()) == NIL))
         {
             myHeader->setLevel(myHeader->getLevel() - 1);
         }
     }
 }
 
 //// STATISTICS on skiplist
 void SkipList::stat()
 {
     int count = 0;
     SkipListElement *element;
     SkipListElement *nextElement;
 
     element     = myHeader;
     nextElement = element->getElement(0);
 
     while ((nextElement != NIL))
     {
         count++;
         element     = nextElement;
         nextElement = element->getElement(0);
     }
     std::cout << "Have number of elements ... " << count << std::endl;
     std::cout << "Size  ..................... " << myLength << std::endl;
     {
         int *hist;
         hist = new int[20];
         int i;
         long totalPointers, usedPointers;
         for (i = 0; i < 20; i++)
         {
             hist[i] = 0;
         }
         element     = myHeader;
         count       = 0;
         nextElement = element->getElement(0);
         while ((nextElement != NIL))
         {
             count++;
             hist[nextElement->getLevel()]++;
             element     = nextElement;
             nextElement = element->getElement(0);
         }
         //
         // There are SKIPLIST_MAXLEVEL * count available pointers
         //
         totalPointers = SKIPLIST_MAXLEVEL * count;
         usedPointers  = 0;
         //
         // of these every node that is not at the max level wastes some
         //
         for (i = 0; i < 20; i++)
         {
             if (hist[i] > 0)
                 std::cout << std::setw(2) << i << ": " << std::setw(6) << hist[i] << std::endl;
             usedPointers += hist[i] * (1 + i);
         }
         std::cout << "Used  pointers " << usedPointers << std::endl;
         std::cout << "Total pointers " << totalPointers
                   << " efficiency = " << (double)usedPointers / (double)totalPointers << std::endl;
         delete[] hist;
     }
     return;
 }
diff --git a/kstars/htmesh/SkipListElement.cpp b/kstars/htmesh/SkipListElement.cpp
index 1a2636ded..ac5482e65 100644
--- a/kstars/htmesh/SkipListElement.cpp
+++ b/kstars/htmesh/SkipListElement.cpp
@@ -1,49 +1,49 @@
 /*
   File: SkipListElement.C
   Author: Bruno Grossniklaus, 13.11.97
   Version: 1.0
   History:
   13.11.97; Gro; Version 1.0
 */
 
 #include <iostream> // cout
 
 #include "SkipListElement.h"
 
 ////////////////////////////////////////////////////////////////////////////////
 SkipListElement::SkipListElement(long level, Key key, Value value) : myLevel(level), myKey(key), myValue(value)
 {
     for (int i = 0; i < SKIPLIST_MAXLEVEL; i++)
-        myNext[i] = 0;
+        myNext[i] = nullptr;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 SkipListElement *SkipListElement::getElement(long level)
 {
     if (level > myLevel)
     {
         std::cerr << "Error in :"
                   << "SkipListElement::getElement() level:";
         std::cerr << level << ", my level:" << myLevel << ", max level: " << SKIPLIST_MAXLEVEL << std::endl;
         return (this);
     }
     else
     {
         return (myNext[level]);
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 void SkipListElement::setElement(long level, SkipListElement *element)
 {
     if (level > myLevel)
     {
         std::cerr << "Error in :"
                   << "SkipListElement::setElement() level:";
         std::cerr << level << ", my level:" << myLevel << ", max level: " << SKIPLIST_MAXLEVEL << std::endl;
     }
     else
     {
         myNext[level] = element;
     }
 }
diff --git a/kstars/htmesh/SpatialException.h b/kstars/htmesh/SpatialException.h
index 9c9630754..c600adb15 100644
--- a/kstars/htmesh/SpatialException.h
+++ b/kstars/htmesh/SpatialException.h
@@ -1,169 +1,169 @@
 //#		Filename:	SpatialException.h
 //#
 //#		Author:		Peter Z Kunszt based on John Doug Reynolds'code
 //#
 //#		Date:		March 1998
 //#
 //#		Copyright (C) 2000  Peter Z. Kunszt, Alex S. Szalay, Aniruddha R. Thakar
 //#                     The Johns Hopkins University
 //#
 //#     Modification History:
 //#
 //#     Oct 18, 2001 : Dennis C. Dinge -- Replaced ValVec with std::vector
 //#
 
 #ifndef _SpatialException_h
 #define _SpatialException_h
 
 #include "SpatialGeneral.h"
 
 /** HTM SpatialIndex Exception base class
     This is the base class for all Science Archive exceptions.  It may
     be used as a generic exception, but programmers are encouraged to
     use the more specific derived classes.  Note that all Spatial
     exceptions are also Standard Library exceptions by
     inheritance.
 */
 
 class LINKAGE SpatialException
 {
   public:
     /** Default and explicit constructor.
             The default constructor
             supplies a generic message indicating the exception type.  The
             explicit constructor sets the message to a copy of the provided
             string.  This behavior is shared by all derived classes.
         */
 
-    SpatialException(const char *what = 0, int defIndex = 1) throw();
+    SpatialException(const char *what = nullptr, int defIndex = 1) throw();
 
     /** Standard constructor.
             The message is assembled from copies of
             the two component strings.  The first indicates where in the
             program the exception was thrown, and the second indicates why.
             The null pointer is used to select standard components according
             to the type of the exception.  This behavior is shared by all
             derived classes.
         */
     SpatialException(const char *context, const char *because, int defIndex = 1) throw();
 
     /// Copy constructor.
     SpatialException(const SpatialException &) throw();
 
     /// Assignment operator.
     SpatialException &operator=(const SpatialException &) throw();
 
     /// Destructor.
     virtual ~SpatialException() throw();
 
     /// Returns the message as set during construction.
     virtual const char *what() const throw();
 
     /// return string length also for null strings
     int slen(const char *) const;
 
     /// deallocate string
     void clear();
 
     /// default error string
     static const char *defaultstr[];
 
   protected:
     /// error string to assemble
     char *str_;
 };
 
 /** SpatialException thrown by unimplemented functions.
     This Exception should be thrown wherever
     important functionality has been left temporarily unimplemented.
     Typically this exception will apply to an entire function.
 */
 
 class LINKAGE SpatialUnimplemented : public SpatialException
 {
   public:
     /// Default and explicit constructors.
-    SpatialUnimplemented(const char *what = 0) throw();
+    SpatialUnimplemented(const char *what = nullptr) throw();
 
     /// Standard constructor.
     SpatialUnimplemented(const char *context, const char *because) throw();
 
     /// Copy constructor.
     SpatialUnimplemented(const SpatialUnimplemented &) throw();
 };
 
 /** SpatialException thrown on operational failure.
     This Exception should be thrown when an operation
     fails unexpectedly.  A special constructor is provided for
     assembling the message from the typical components: program
     context, operation name, resource name, and explanation.  As usual,
     any component may be left out by specifying the null pointer.
 */
 
 class LINKAGE SpatialFailure : public SpatialException
 {
   public:
     /// Default and explicit constructors.
-    SpatialFailure(const char *what = 0) throw();
+    SpatialFailure(const char *what = nullptr) throw();
 
     /// Standard constructor.
     SpatialFailure(const char *context, const char *because) throw();
 
     /// Special constructor.
-    SpatialFailure(const char *context, const char *operation, const char *resource, const char *because = 0) throw();
+    SpatialFailure(const char *context, const char *operation, const char *resource, const char *because = nullptr) throw();
 
     /// Copy constructor.
     SpatialFailure(const SpatialFailure &) throw();
 };
 
 /** SpatialException thrown on violation of array bounds.
     This Exception should be thrown on detection of an
     attempt to access elements beyond the boundaries of an array.  A
     special constructor is provided for assembling the message from the
     typical components: program context, array name, violated boundary,
     and violating index.
 */
 
 class LINKAGE SpatialBoundsError : public SpatialException
 {
   public:
     /// Default and explicit constructors.
-    SpatialBoundsError(const char *what = 0) throw();
+    SpatialBoundsError(const char *what = nullptr) throw();
 
     /** Standard constructor.
             If limit and index are -1, both are
             considered unknown.  Note that the upper limit of a zero-offset
             array is not the same as the number of elements.
         */
     SpatialBoundsError(const char *context, const char *array, int32 limit = -1, int32 index = -1) throw();
 
     /// Copy constructor.
     SpatialBoundsError(const SpatialBoundsError &) throw();
 };
 
 /** SpatialException thrown on violation of interface protocols.
     This Exception should be thrown when a program,
     class, or function interface requirement is breached.
     Specifically, this includes improper usage and invalid arguments.
     For the latter, a special constructor is provided for assembling
     the message from the typical components: program context, argument
     name, and explanation.
 */
 
 class LINKAGE SpatialInterfaceError : public SpatialException
 {
   public:
     /// Default and explicit constructors.
-    SpatialInterfaceError(const char *what = 0) throw();
+    SpatialInterfaceError(const char *what = nullptr) throw();
 
     /// Standard constructor.
     SpatialInterfaceError(const char *context, const char *because) throw();
 
     /// Special constructor.
     SpatialInterfaceError(const char *context, const char *argument, const char *because) throw();
 
     /// Copy constructor.
     SpatialInterfaceError(const SpatialInterfaceError &) throw();
 };
 
 #endif /* _SpatialException_h */
diff --git a/kstars/htmesh/SpatialIndex.cpp b/kstars/htmesh/SpatialIndex.cpp
index 4ff13c962..548e82463 100644
--- a/kstars/htmesh/SpatialIndex.cpp
+++ b/kstars/htmesh/SpatialIndex.cpp
@@ -1,613 +1,613 @@
 //#     Filename:       SpatialIndex.cpp
 //#
 //#     The SpatialIndex class is defined here.
 //#
 //#     Author:         Peter Z. Kunszt based on A. Szalay's code
 //#
 //#     Date:           October 15, 1998
 //#
 //#		Copyright (C) 2000  Peter Z. Kunszt, Alex S. Szalay, Aniruddha R. Thakar
 //#                     The Johns Hopkins University
 //#
 //#     Modification History:
 //#
 //#     Oct 18, 2001 : Dennis C. Dinge -- Replaced ValVec with std::vector
 //#		Jul 25, 2002 : Gyorgy Fekete -- Added pointById()
 //#
 
 #include "SpatialIndex.h"
 #include "SpatialException.h"
 
 #ifdef _WIN32
 #include <malloc.h>
 #else
 #ifdef __APPLE__
 #include <sys/malloc.h>
 #else
 #include <cstdlib>
 #endif
 #endif
 
 #include <cstdio>
 #include <cmath>
 // ===========================================================================
 //
 // Macro definitions for readability
 //
 // ===========================================================================
 
 #define N(x)      nodes_[(x)]
 #define V(x)      vertices_[nodes_[index].v_[(x)]]
 #define IV(x)     nodes_[index].v_[(x)]
 #define W(x)      vertices_[nodes_[index].w_[(x)]]
 #define IW(x)     nodes_[index].w_[(x)]
 #define ICHILD(x) nodes_[index].childID_[(x)]
 
 #define IV_(x)     nodes_[index_].v_[(x)]
 #define IW_(x)     nodes_[index_].w_[(x)]
 #define ICHILD_(x) nodes_[index_].childID_[(x)]
 #define IOFFSET    9
 
 // ===========================================================================
 //
 // Member functions for class SpatialIndex
 //
 // ===========================================================================
 
 /////////////CONSTRUCTOR//////////////////////////////////
 //
 SpatialIndex::SpatialIndex(size_t maxlevel, size_t buildlevel)
     : maxlevel_(maxlevel), buildlevel_((buildlevel == 0 || buildlevel > maxlevel) ? maxlevel : buildlevel)
 {
     size_t nodes, vertices;
 
     vMax(&nodes, &vertices);
     layers_.resize(buildlevel_ + 1); // allocate enough space already
     nodes_.resize(nodes + 1);        // allocate space for all nodes
     vertices_.resize(vertices + 1);  // allocate space for all vertices
 
     N(0).index_ = 0; // initialize invalid node
 
     // initialize first layer
     layers_[0].level_       = 0;
     layers_[0].nVert_       = 6;
     layers_[0].nNode_       = 8;
     layers_[0].nEdge_       = 12;
     layers_[0].firstIndex_  = 1;
     layers_[0].firstVertex_ = 0;
 
     // set the first 6 vertices
     float64 v[6][3] = {
         { 0.0L, 0.0L, 1.0L },  // 0
         { 1.0L, 0.0L, 0.0L },  // 1
         { 0.0L, 1.0L, 0.0L },  // 2
         { -1.0L, 0.0L, 0.0L }, // 3
         { 0.0L, -1.0L, 0.0L }, // 4
         { 0.0L, 0.0L, -1.0L }  // 5
     };
 
     for (int i = 0; i < 6; i++)
         vertices_[i].set(v[i][0], v[i][1], v[i][2]);
 
     // create the first 8 nodes - index 1 through 8
     index_ = 1;
     newNode(1, 5, 2, 8, 0);  // S0
     newNode(2, 5, 3, 9, 0);  // S1
     newNode(3, 5, 4, 10, 0); // S2
     newNode(4, 5, 1, 11, 0); // S3
     newNode(1, 0, 4, 12, 0); // N0
     newNode(4, 0, 3, 13, 0); // N1
     newNode(3, 0, 2, 14, 0); // N2
     newNode(2, 0, 1, 15, 0); // N3
 
     //  loop through buildlevel steps, and build the nodes for each layer
 
     size_t pl    = 0;
     size_t level = buildlevel_;
     while (level-- > 0)
     {
         SpatialEdge edge(*this, pl);
         edge.makeMidPoints();
         makeNewLayer(pl);
         ++pl;
     }
 
     sortIndex();
 }
 
 /////////////NODEVERTEX///////////////////////////////////
 // nodeVertex: return the vectors of the vertices, based on the ID
 //
 void SpatialIndex::nodeVertex(const uint64 id, SpatialVector &v0, SpatialVector &v1, SpatialVector &v2) const
 {
     if (buildlevel_ == maxlevel_)
     {
         uint32 idx = (uint32)id - leaves_ + IOFFSET; // -jbb: Fix segfault.  See "idx =" below.
         v0         = vertices_[nodes_[idx].v_[0]];
         v1         = vertices_[nodes_[idx].v_[1]];
         v2         = vertices_[nodes_[idx].v_[2]];
         return;
     }
 
     // buildlevel < maxlevel
     // get the id of the stored leaf that we are in
     // and get the vertices of the node we want
     uint64 sid = id >> ((maxlevel_ - buildlevel_) * 2);
     uint32 idx = (uint32)(sid - storedleaves_ + IOFFSET);
 
     v0 = vertices_[nodes_[idx].v_[0]];
     v1 = vertices_[nodes_[idx].v_[1]];
     v2 = vertices_[nodes_[idx].v_[2]];
 
     // loop therough additional levels,
     // pick the correct triangle accordingly, storing the
     // vertices in v1,v2,v3
     for (uint32 i = buildlevel_ + 1; i <= maxlevel_; i++)
     {
         uint64 j         = (id >> ((maxlevel_ - i) * 2)) & 3;
         SpatialVector w0 = v1 + v2;
         w0.normalize();
         SpatialVector w1 = v0 + v2;
         w1.normalize();
         SpatialVector w2 = v1 + v0;
         w2.normalize();
 
         switch (j)
         {
             case 0:
                 v1 = w2;
                 v2 = w1;
                 break;
             case 1:
                 v0 = v1;
                 v1 = w0;
                 v2 = w2;
                 break;
             case 2:
                 v0 = v2;
                 v1 = w1;
                 v2 = w0;
                 break;
             case 3:
                 v0 = w0;
                 v1 = w1;
                 v2 = w2;
                 break;
         }
     }
 }
 
 /////////////MAKENEWLAYER/////////////////////////////////
 // makeNewLayer: generate a new layer and the nodes in it
 //
 void SpatialIndex::makeNewLayer(size_t oldlayer)
 {
     uint64 index, id;
     size_t newlayer                = oldlayer + 1;
     layers_[newlayer].level_       = layers_[oldlayer].level_ + 1;
     layers_[newlayer].nVert_       = layers_[oldlayer].nVert_ + layers_[oldlayer].nEdge_;
     layers_[newlayer].nNode_       = 4 * layers_[oldlayer].nNode_;
     layers_[newlayer].nEdge_       = layers_[newlayer].nNode_ + layers_[newlayer].nVert_ - 2;
     layers_[newlayer].firstIndex_  = index_;
     layers_[newlayer].firstVertex_ = layers_[oldlayer].firstVertex_ + layers_[oldlayer].nVert_;
 
     uint64 ioffset = layers_[oldlayer].firstIndex_;
 
     for (index = ioffset; index < ioffset + layers_[oldlayer].nNode_; index++)
     {
         id        = N(index).id_ << 2;
         ICHILD(0) = newNode(IV(0), IW(2), IW(1), id++, index);
         ICHILD(1) = newNode(IV(1), IW(0), IW(2), id++, index);
         ICHILD(2) = newNode(IV(2), IW(1), IW(0), id++, index);
         ICHILD(3) = newNode(IW(0), IW(1), IW(2), id, index);
     }
 }
 
 /////////////NEWNODE//////////////////////////////////////
 // newNode: make a new node
 //
 uint64 SpatialIndex::newNode(size_t v1, size_t v2, size_t v3, uint64 id, uint64 parent)
 {
     IV_(0) = v1; // vertex indices
     IV_(1) = v2;
     IV_(2) = v3;
 
     IW_(0) = 0; // middle point indices
     IW_(1) = 0;
     IW_(2) = 0;
 
     ICHILD_(0) = 0; // child indices
     ICHILD_(1) = 0; // index 0 is invalid node.
     ICHILD_(2) = 0;
     ICHILD_(3) = 0;
 
     N(index_).id_     = id;     // set the id
     N(index_).index_  = index_; // set the index
     N(index_).parent_ = parent; // set the parent
 
     return index_++;
 }
 
 /////////////VMAX/////////////////////////////////////////
 // vMax: compute the maximum number of vertices for the
 //       polyhedron after buildlevel of subdivisions and
 //       the total number of nodes that we store
 //       also, calculate the number of leaf nodes that we eventually have.
 //
 void SpatialIndex::vMax(size_t *nodes, size_t *vertices)
 {
     uint64 nv = 6; // initial values
     uint64 ne = 12;
     uint64 nf = 8;
     int32 i   = buildlevel_;
     *nodes    = (size_t)nf;
 
     while (i-- > 0)
     {
         nv += ne;
         nf *= 4;
         ne = nf + nv - 2;
         *nodes += (size_t)nf;
     }
     *vertices     = (size_t)nv;
     storedleaves_ = nf;
 
     // calculate number of leaves
     i = maxlevel_ - buildlevel_;
     while (i-- > 0)
         nf *= 4;
     leaves_ = nf;
 }
 
 /////////////SORTINDEX////////////////////////////////////
 // sortIndex: sort the index so that the first node is the invalid node
 //            (index 0), the next 8 nodes are the root nodes
 //            and then we put all the leaf nodes in the following block
 //            in ascending id-order.
 //            All the rest of the nodes is at the end.
 void SpatialIndex::sortIndex()
 {
     std::vector<QuadNode> oldnodes(nodes_); // create a copy of the node list
     size_t index;
     size_t nonleaf;
     size_t leaf;
 
 #define ON(x) oldnodes[(x)]
 
     // now refill the nodes_ list according to our sorting.
     for (index = IOFFSET, leaf = IOFFSET, nonleaf = nodes_.size() - 1; index < nodes_.size(); index++)
     {
         if (ON(index).childID_[0] == 0) // childnode
         {
             // set leaf into list
             N(leaf) = ON(index);
             // set parent's pointer to this leaf
             for (size_t i = 0; i < 4; i++)
             {
                 if (N(N(leaf).parent_).childID_[i] == index)
                 {
                     N(N(leaf).parent_).childID_[i] = leaf;
                     break;
                 }
             }
             leaf++;
         }
         else
         {
             // set nonleaf into list from the end
             // set parent of the children already to this
             // index, they come later in the list.
             N(nonleaf)                         = ON(index);
             ON(N(nonleaf).childID_[0]).parent_ = nonleaf;
             ON(N(nonleaf).childID_[1]).parent_ = nonleaf;
             ON(N(nonleaf).childID_[2]).parent_ = nonleaf;
             ON(N(nonleaf).childID_[3]).parent_ = nonleaf;
             // set parent's pointer to this leaf
             for (size_t i = 0; i < 4; i++)
             {
                 if (N(N(nonleaf).parent_).childID_[i] == index)
                 {
                     N(N(nonleaf).parent_).childID_[i] = nonleaf;
                     break;
                 }
             }
             nonleaf--;
         }
     }
 }
 //////////////////IDBYNAME/////////////////////////////////////////////////
 // Translate ascii leaf name to a uint32
 //
 // The following encoding is used:
 //
 // The string leaf name has the always the same structure, it begins with
 // an N or S, indicating north or south cap and then numbers 0-3 follow
 // indicating which child to descend into. So for a depth-5-index we have
 // strings like
 //                 N012023  S000222  N102302  etc
 //
 // Each of the numbers correspond to 2 bits of code (00 01 10 11) in the
 // uint32. The first two bits are 10 for S and 11 for N. For example
 //
 //                 N 0 1 2 0 2 3
 //                 11000110001011  =  12683 (dec)
 //
 // The leading bits are always 0.
 //
 // --- WARNING: This works only up to 15 levels.
 //              (we probably never need more than 7)
 //
 
 uint64 SpatialIndex::idByName(const char *name)
 {
     uint64 out  = 0, i;
     uint32 size = 0;
 
-    if (name == 0) // null pointer-name
+    if (name == nullptr) // null pointer-name
         throw SpatialFailure("SpatialIndex:idByName:no name given");
     if (name[0] != 'N' && name[0] != 'S') // invalid name
         throw SpatialFailure("SpatialIndex:idByName:invalid name", name);
 
     size = strlen(name); // determine string length
     // at least size-2 required, don't exceed max
     if (size < 2)
         throw SpatialFailure("SpatialIndex:idByName:invalid name - too short ", name);
     if (size > HTMNAMEMAX)
         throw SpatialFailure("SpatialIndex:idByName:invalid name - too long ", name);
 
     for (i = size - 1; i > 0; i--) // set bits starting from the end
     {
         if (name[i] > '3' || name[i] < '0') // invalid name
             throw SpatialFailure("SpatialIndex:idByName:invalid name digit ", name);
         out += (uint64(name[i] - '0') << 2 * (size - i - 1));
     }
 
     i = 2; // set first pair of bits, first bit always set
     if (name[0] == 'N')
         i++; // for north set second bit too
     out += (i << (2 * size - 2));
 
     /************************
     // This code may be used later for hashing !
     if(size==2)out -= 8;
     else {
       size -= 2;
       uint32 offset = 0, level4 = 8;
       for(i = size; i > 0; i--) { // calculate 4 ^ (level-1), level = size-2
         offset += level4;
         level4 *= 4;
       }
       out -= level4 - offset;
     }
     **************************/
     return out;
 }
 
 //////////////////NAMEBYID/////////////////////////////////////////////////
 // Translate uint32 to an ascii leaf name
 //
 // The encoding described above may be decoded again using the following
 // procedure:
 //
 //  * Traverse the uint32 from left to right.
 //  * Find the first 'true' bit.
 //  * The first pair gives N (11) or S (10).
 //  * The subsequent bit-pairs give the numbers 0-3.
 //
 
 char *SpatialIndex::nameById(uint64 id, char *name)
 {
     uint32 size = 0, i;
 #ifdef _WIN32
     uint64 IDHIGHBIT  = 1;
     uint64 IDHIGHBIT2 = 1;
     IDHIGHBIT         = IDHIGHBIT << 63;
     IDHIGHBIT2        = IDHIGHBIT2 << 62;
 #endif
 
     /*************
     // This code might be useful for hashing later !!
 
     // calculate the level (i.e. 8*4^level) and add it to the id:
     uint32 level=0, level4=8, offset=8;
     while(id >= offset) {
       if(++level > 13) { ok = false; offset = 0; break; }// level too deep
       level4 *= 4;
       offset += level4;
     }
     id += 2 * level4 - offset;
     **************/
 
     // determine index of first set bit
     for (i = 0; i < IDSIZE; i += 2)
     {
         if ((id << i) & IDHIGHBIT)
             break;
         if ((id << i) & IDHIGHBIT2) // invalid id
             throw SpatialFailure("SpatialIndex:nameById: invalid ID");
     }
     if (id == 0)
         throw SpatialFailure("SpatialIndex:nameById: invalid ID");
 
     size = (IDSIZE - i) >> 1;
     // allocate characters
     if (!name)
         name = new char[size + 1];
 
     // fill characters starting with the last one
     for (i = 0; i < size - 1; i++)
         name[size - i - 1] = '0' + char((id >> i * 2) & 3);
 
     // put in first character
     if ((id >> (size * 2 - 2)) & 1)
     {
         name[0] = 'N';
     }
     else
     {
         name[0] = 'S';
     }
     name[size] = 0; // end string
 
     return name;
 }
 //////////////////POINTBYID////////////////////////////////////////////////
 // Find a vector for the leaf node given by its ID
 //
 void SpatialIndex::pointById(SpatialVector &vec, uint64 ID) const
 {
     //	uint64 index;
     float64 center_x, center_y, center_z, sum;
     char name[HTMNAMEMAX];
 
     SpatialVector v0, v1, v2; //
 
     this->nodeVertex(ID, v0, v1, v2);
 
     nameById(ID, name);
     /*
         I started to go this way until I discovered nameByID...
     	Some docs would be nice for this
 
     	switch(name[1]){
     	case '0':
     		index = name[0] == 'S' ? 1 : 5;
     		break;
     	case '1':
     		index = name[0] == 'S' ? 2 : 6;
     		break;
     	case '2':
     		index = name[0] == 'S' ? 3 : 7;
     		break;
     	case '3':
     		index = name[0] == 'S' ? 4 : 8;
     		break;
     	}
     */
     //    cerr << "---------- Point by id: " << name << endl;
     //	v0.show(); v1.show(); v2.show();
     center_x = v0.x_ + v1.x_ + v2.x_;
     center_y = v0.y_ + v1.y_ + v2.y_;
     center_z = v0.z_ + v1.z_ + v2.z_;
     sum      = center_x * center_x + center_y * center_y + center_z * center_z;
     sum      = sqrt(sum);
     center_x /= sum;
     center_y /= sum;
     center_z /= sum;
     vec.x_ = center_x;
     vec.y_ = center_y;
     vec.z_ = center_z; // I don't want it nomralized or radec to be set,
     //	cerr << " - - - - " << endl;
     //	vec.show();
     //	cerr << "---------- Point by id Retuning" << endl;
 }
 //////////////////IDBYPOINT////////////////////////////////////////////////
 // Find a leaf node where a vector points to
 //
 
 uint64 SpatialIndex::idByPoint(const SpatialVector &v) const
 {
     uint64 index;
 
     // start with the 8 root triangles, find the one which v points to
     for (index = 1; index <= 8; index++)
     {
         if ((V(0) ^ V(1)) * v < -gEpsilon)
             continue;
         if ((V(1) ^ V(2)) * v < -gEpsilon)
             continue;
         if ((V(2) ^ V(0)) * v < -gEpsilon)
             continue;
         break;
     }
     // loop through matching child until leaves are reached
     while (ICHILD(0) != 0)
     {
         uint64 oldindex = index;
         for (size_t i = 0; i < 4; i++)
         {
             index = nodes_[oldindex].childID_[i];
             if ((V(0) ^ V(1)) * v < -gEpsilon)
                 continue;
             if ((V(1) ^ V(2)) * v < -gEpsilon)
                 continue;
             if ((V(2) ^ V(0)) * v < -gEpsilon)
                 continue;
             break;
         }
     }
     // return if we have reached maxlevel
     if (maxlevel_ == buildlevel_)
         return N(index).id_;
 
     // from now on, continue to build name dynamically.
     // until maxlevel_ levels depth, continue to append the
     // correct index, build the index on the fly.
     char name[HTMNAMEMAX];
     nameById(N(index).id_, name);
     size_t len       = strlen(name);
     SpatialVector v0 = V(0);
     SpatialVector v1 = V(1);
     SpatialVector v2 = V(2);
 
     size_t level = maxlevel_ - buildlevel_;
     while (level--)
     {
         SpatialVector w0 = v1 + v2;
         w0.normalize();
         SpatialVector w1 = v0 + v2;
         w1.normalize();
         SpatialVector w2 = v1 + v0;
         w2.normalize();
 
         if (isInside(v, v0, w2, w1))
         {
             name[len++] = '0';
             v1          = w2;
             v2          = w1;
             continue;
         }
         else if (isInside(v, v1, w0, w2))
         {
             name[len++] = '1';
             v0          = v1;
             v1          = w0;
             v2          = w2;
             continue;
         }
         else if (isInside(v, v2, w1, w0))
         {
             name[len++] = '2';
             v0          = v2;
             v1          = w1;
             v2          = w0;
             continue;
         }
         else if (isInside(v, w0, w1, w2))
         {
             name[len++] = '3';
             v0          = w0;
             v1          = w1;
             v2          = w2;
             continue;
         }
     }
     name[len] = '\0';
     return idByName(name);
 }
 
 //////////////////ISINSIDE/////////////////////////////////////////////////
 // Test whether a vector is inside a triangle. Input triangle has
 // to be sorted in a counter-clockwise direction.
 //
 bool SpatialIndex::isInside(const SpatialVector &v, const SpatialVector &v0, const SpatialVector &v1,
                             const SpatialVector &v2) const
 {
     if ((v0 ^ v1) * v < -gEpsilon)
         return false;
     if ((v1 ^ v2) * v < -gEpsilon)
         return false;
     if ((v2 ^ v0) * v < -gEpsilon)
         return false;
     return true;
 }
diff --git a/kstars/htmesh/SpatialIndex.h b/kstars/htmesh/SpatialIndex.h
index 8856a89d2..70ac69b32 100644
--- a/kstars/htmesh/SpatialIndex.h
+++ b/kstars/htmesh/SpatialIndex.h
@@ -1,150 +1,150 @@
 #ifndef _SpatialIndex_h
 #define _SpatialIndex_h
 
 //#     Filename:       SpatialIndex.h
 //#
 //#     SpatialIndex is the class for the sky indexing routines.
 //#
 //#     Author:         Peter Z. Kunszt, based on A. Szalay s code
 //#
 //#     Date:           October 15, 1998
 //#
 //#		Copyright (C) 2000  Peter Z. Kunszt, Alex S. Szalay, Aniruddha R. Thakar
 //#                     The Johns Hopkins University
 //#     Modification History:
 //#
 //#     Oct 18, 2001 : Dennis C. Dinge -- Replaced ValVec with std::vector
 //#	    Sept 9, 2002 : Gyorgy Fekete -- added setMaxlevel()
 //#
 
 #include <cmath>
 #include <string.h>
 #include <time.h>
 #include <SpatialGeneral.h>
 #include <SpatialVector.h>
 #include <SpatialEdge.h>
 
 #include <vector>
 
 //########################################################################
 //#
 //# Spatial Index class
 //#
 
 /** @class SpatialIndex
    SpatialIndex is a quad tree of spherical triangles. The tree
    is built in the following way: Start out with 8 triangles on the
    sphere using the 3 main circles to determine them. Then, every
    triangle can be decomposed into 4 new triangles by drawing main
    circles between midpoints of its edges:
 
 <pre>
 
 .                            /\
 .                           /  \
 .                          /____\
 .                         /\    /\
 .                        /  \  /  \
 .                       /____\/____\
 
 </pre>
    This is how the quad tree is built up to a certain level by
    decomposing every triangle again and again.
 */
 
 class LINKAGE SpatialIndex
 {
   public:
     /** Constructor.
             Give the level of the index and optionally the level to build -
             i.e. the depth to keep in memory.  if maxlevel - buildlevel > 0
             , that many levels are generated on the fly each time the index
             is called. */
     SpatialIndex(size_t maxlevel, size_t buildlevel = 5);
 
     /// NodeName conversion to integer ID
     static uint64 idByName(const char *);
 
     /** int32 conversion to a string (name of database).
             WARNING: if name is already allocated, a size of at least 17 is
             required.  The conversion is done by directly calculating the
             name from a number.  To calculate the name of a certain level,
             the mechanism is that the name is given by (#of nodes in that
             level) + (id of node).  So for example, for the first level,
             there are 8 nodes, and we get the names from numbers 8 through
             15 giving S0,S1,S2,S3,N0,N1,N2,N3.  The order is always
             ascending starting from S0000.. to N3333...  */
-    static char *nameById(uint64 ID, char *name = 0);
+    static char *nameById(uint64 ID, char *name = nullptr);
 
     /** find the vector to the centroid of a triangle represented by
           the ID */
     void pointById(SpatialVector &vector, uint64 ID) const;
 
     /** find a node by giving a vector.
             The ID of the node is returned. */
     uint64 idByPoint(const SpatialVector &vector) const;
 
     /// return the actual vertex vectors
     void nodeVertex(const uint64 id, SpatialVector &v1, SpatialVector &v2, SpatialVector &v3) const;
 
   private:
     // STRUCTURES
 
     struct Layer
     {
         size_t level_;       // layer level
         size_t nVert_;       // number of vertices in this layer
         size_t nNode_;       // number of nodes
         size_t nEdge_;       // number of edges
         uint64 firstIndex_;  // index of first node of this layer
         size_t firstVertex_; // index of first vertex of this layer
     };
 
     struct QuadNode
     {
         uint64 index_;      // its own index
         size_t v_[3];       // The three vertex vector indices
         size_t w_[3];       // The three middlepoint vector indices
         uint64 childID_[4]; // ids of children
         uint64 parent_;     // id of the parent node (needed for sorting)
         uint64 id_;         // numeric id -> name
     };
 
     // FUNCTIONS
 
     // insert a new node_[] into the list. The vertex indices are given by
     // v1,v2,v3 and the id of the node is set.
     uint64 newNode(size_t v1, size_t v2, size_t v3, uint64 id, uint64 parent);
 
     // make new nodes in a new layer.
     void makeNewLayer(size_t oldlayer);
 
     // return the total number of nodes and vertices
     void vMax(size_t *nodes, size_t *vertices);
 
     // sort the index so that the leaf nodes are at the beginning
     void sortIndex();
 
     // Test whether a vector v is inside a triangle v0,v1,v2. Input
     // triangle has to be sorted in a counter-clockwise direction.
     bool isInside(const SpatialVector &v, const SpatialVector &v0, const SpatialVector &v1,
                   const SpatialVector &v2) const;
 
     // VARIABLES
 
     size_t maxlevel_;             // the depth of the Layer
     size_t buildlevel_;           // the depth of the Layer stored
     uint64 leaves_;               // number of leaf nodes
     uint64 storedleaves_;         // number of stored leaf nodes
     std::vector<QuadNode> nodes_; // the array of nodes
     std::vector<Layer> layers_;   // array of layers
 
     std::vector<SpatialVector> vertices_;
     uint64 index_; // the current index_ of vertices
 
     friend class SpatialEdge;
     friend class SpatialConvex;
     friend class RangeConvex;
 };
 
 #endif
diff --git a/kstars/kspopupmenu.cpp b/kstars/kspopupmenu.cpp
index 10c817240..f55567992 100644
--- a/kstars/kspopupmenu.cpp
+++ b/kstars/kspopupmenu.cpp
@@ -1,642 +1,642 @@
 /***************************************************************************
                           kspopupmenu.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sat Feb 27 2003
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "kspopupmenu.h"
 
 #include "config-kstars.h"
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "skyobjects/skyobject.h"
 #include "skyobjects/starobject.h"
 #include "skyobjects/trailobject.h"
 #include "skyobjects/deepskyobject.h"
 #include "skyobjects/ksmoon.h"
 #include "skyobjects/satellite.h"
 #include "skyobjects/supernova.h"
 #include "skycomponents/constellationboundarylines.h"
 #include "skycomponents/flagcomponent.h"
 #include "skycomponents/skymapcomposite.h"
 #include "tools/whatsinteresting/wiview.h"
 
 #include "observinglist.h"
 
 #ifdef HAVE_INDI
 #include "indi/indilistener.h"
 #include "indi/guimanager.h"
 #include "indi/driverinfo.h"
 #include "indi/indistd.h"
 #include "indi/indidevice.h"
 #include "indi/indigroup.h"
 #include "indi/indiproperty.h"
 #include "indi/indielement.h"
 #include <basedevice.h>
 #endif
 
 #include <KLocalizedString>
 
 #include <QSignalMapper>
 #include <QWidgetAction>
 
 namespace
 {
 // Convert magnitude to string representation for QLabel
 QString magToStr(double m)
 {
     if (m > -30 && m < 90)
         return QString("%1<sup>m</sup>").arg(m, 0, 'f', 2);
     else
         return QString();
 }
 
 // Return object name
 QString getObjectName(SkyObject *obj)
 {
     // FIXME: make logic less convoluted.
     if (obj->longname() != obj->name()) // Object has proper name
     {
         return obj->translatedLongName() + ", " + obj->translatedName();
     }
     else
     {
         if (!obj->translatedName2().isEmpty())
             return obj->translatedName() + ", " + obj->translatedName2();
         else
             return obj->translatedName();
     }
 }
 
 // String representation for rise/set time of object. If object
 // doesn't rise/set returns descriptive string.
 //
 // Second parameter choose between raise and set. 'true' for
 // raise, 'false' for set.
 QString riseSetTimeLabel(SkyObject *o, bool isRaise)
 {
     KStarsData *data = KStarsData::Instance();
     QTime t          = o->riseSetTime(data->ut(), data->geo(), isRaise);
     if (t.isValid())
     {
         //We can round to the nearest minute by simply adding 30 seconds to the time.
         QString time = QLocale().toString(t.addSecs(30), QLocale::ShortFormat);
         return isRaise ? i18n("Rise time: %1", time) :
                          i18nc("the time at which an object falls below the horizon", "Set time: %1", time);
     }
     if (o->alt().Degrees() > 0)
         return isRaise ? i18n("No rise time: Circumpolar") : i18n("No set time: Circumpolar");
     else
         return isRaise ? i18n("No rise time: Never rises") : i18n("No set time: Never rises");
 }
 
 // String representation for transit time for object
 QString transitTimeLabel(SkyObject *o)
 {
     KStarsData *data = KStarsData::Instance();
     QTime t          = o->transitTime(data->ut(), data->geo());
     if (t.isValid())
         //We can round to the nearest minute by simply adding 30 seconds to the time.
         return i18n("Transit time: %1", QLocale().toString(t.addSecs(30), QLocale::ShortFormat));
     else
         return "--:--";
 }
 }
 
 KSPopupMenu::KSPopupMenu()
-    : QMenu(KStars::Instance()), m_CurrentFlagIdx(-1), m_EditActionMapping(0), m_DeleteActionMapping(0)
+    : QMenu(KStars::Instance()), m_CurrentFlagIdx(-1), m_EditActionMapping(nullptr), m_DeleteActionMapping(nullptr)
 {
 }
 
 KSPopupMenu::~KSPopupMenu()
 {
     if (m_EditActionMapping)
     {
         delete m_EditActionMapping;
     }
 
     if (m_DeleteActionMapping)
     {
         delete m_DeleteActionMapping;
     }
 }
 
 void KSPopupMenu::createEmptyMenu(SkyPoint *nullObj)
 {
     KStars *ks = KStars::Instance();
     SkyObject o(SkyObject::TYPE_UNKNOWN, nullObj->ra(), nullObj->dec());
     o.setAlt(nullObj->alt());
     o.setAz(nullObj->az());
     initPopupMenu(&o, i18n("Empty sky"), QString(), QString(), false, false);
     addAction(i18nc("Sloan Digital Sky Survey", "Show SDSS Image"), ks->map(), SLOT(slotSDSS()));
     addAction(i18nc("Digitized Sky Survey", "Show DSS Image"), ks->map(), SLOT(slotDSS()));
 }
 
 void KSPopupMenu::slotEditFlag()
 {
     if (m_CurrentFlagIdx != -1)
     {
         KStars::Instance()->map()->slotEditFlag(m_CurrentFlagIdx);
     }
 }
 
 void KSPopupMenu::slotDeleteFlag()
 {
     if (m_CurrentFlagIdx != -1)
     {
         KStars::Instance()->map()->slotDeleteFlag(m_CurrentFlagIdx);
     }
 }
 
 void KSPopupMenu::slotEditFlag(QAction *action)
 {
     int idx = m_EditActionMapping->value(action, -1);
 
     if (idx == -1)
     {
         return;
     }
 
     else
     {
         KStars::Instance()->map()->slotEditFlag(idx);
     }
 }
 
 void KSPopupMenu::slotDeleteFlag(QAction *action)
 {
     int idx = m_DeleteActionMapping->value(action, -1);
 
     if (idx == -1)
     {
         return;
     }
 
     else
     {
         KStars::Instance()->map()->slotDeleteFlag(idx);
     }
 }
 
 void KSPopupMenu::createStarMenu(StarObject *star)
 {
     KStars *ks = KStars::Instance();
     //Add name, rise/set time, center/track, and detail-window items
     QString name;
     if (star->name() != "star")
     {
         name = star->translatedLongName();
     }
     else
     {
         if (star->getHDIndex())
         {
             name = QString("HD%1").arg(QString::number(star->getHDIndex()));
         }
         else
         {
             // FIXME: this should be some catalog name too
             name = "Star";
         }
     }
     initPopupMenu(star, name, i18n("star"), i18n("%1<sup>m</sup>, %2", star->mag(), star->sptype()));
     //If the star is named, add custom items to popup menu based on object's ImageList and InfoList
     if (star->name() != "star")
     {
         addLinksToMenu(star);
     }
     else
     {
         addAction(i18nc("Sloan Digital Sky Survey", "Show SDSS Image"), ks->map(), SLOT(slotSDSS()));
         addAction(i18nc("Digitized Sky Survey", "Show DSS Image"), ks->map(), SLOT(slotDSS()));
     }
 }
 
 void KSPopupMenu::createDeepSkyObjectMenu(DeepSkyObject *obj)
 {
     QString name     = getObjectName(obj);
     QString typeName = obj->typeName();
     // FIXME: information about angular sizes should be added.
     QString info = magToStr(obj->mag());
     initPopupMenu(obj, name, typeName, info);
     addLinksToMenu(obj);
 }
 
 void KSPopupMenu::createPlanetMenu(SkyObject *p)
 {
     QString info = magToStr(p->mag());
     QString type = i18n("Solar system object");
     ;
     initPopupMenu(p, p->translatedName(), type, info);
     addLinksToMenu(p, false); //don't offer DSS images for planets
 }
 
 void KSPopupMenu::createMoonMenu(KSMoon *moon)
 {
     QString info = QString("%1, %2").arg(magToStr(moon->mag()), moon->phaseName());
     initPopupMenu(moon, moon->translatedName(), QString(), info);
     addLinksToMenu(moon, false); //don't offer DSS images for planets
 }
 
 void KSPopupMenu::createSatelliteMenu(Satellite *satellite)
 {
     KStars *ks = KStars::Instance();
     QString velocity, altitude, range;
     velocity.setNum(satellite->velocity());
     altitude.setNum(satellite->altitude());
     range.setNum(satellite->range());
 
     clear();
 
     addFancyLabel(satellite->name());
     addFancyLabel(satellite->id());
     addFancyLabel(i18n("satellite"));
     addFancyLabel(KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(satellite));
 
     addSeparator();
 
     addFancyLabel(i18n("Velocity: %1 km/s", velocity), -2);
     addFancyLabel(i18n("Altitude: %1 km", altitude), -2);
     addFancyLabel(i18n("Range: %1 km", range), -2);
 
     addSeparator();
 
     //Insert item for centering on object
     addAction(i18n("Center && Track"), ks->map(), SLOT(slotCenter()));
     //Insert item for measuring distances
     //FIXME: add key shortcut to menu items properly!
     addAction(i18n("Angular Distance To...            ["), ks->map(), SLOT(slotBeginAngularDistance()));
     addAction(i18n("Starhop from here to...            "), ks->map(), SLOT(slotBeginStarHop()));
 
     //Insert "Add/Remove Label" item
     if (ks->map()->isObjectLabeled(satellite))
         addAction(i18n("Remove Label"), ks->map(), SLOT(slotRemoveObjectLabel()));
     else
         addAction(i18n("Attach Label"), ks->map(), SLOT(slotAddObjectLabel()));
 }
 
 void KSPopupMenu::createSupernovaMenu(Supernova *supernova)
 {
     QString name = supernova->name();
     float mag    = supernova->mag();
     float z      = supernova->getRedShift();
     QString type = supernova->getType();
 
     QString info;
 
     if (mag < 99)
         info += QString("%1<sup>m</sup> ").arg(mag);
     info += type;
     if (z < 99)
         info += QString(" z: %1").arg(QString::number(z, 'f', 2));
 
     initPopupMenu(supernova, name, i18n("supernova"), info);
 }
 
 void KSPopupMenu::initPopupMenu(SkyObject *obj, const QString &name, const QString &type, QString info,
                                 bool showDetails, bool showObsList, bool showFlags)
 {
     KStarsData *data = KStarsData::Instance();
     SkyMap *map      = SkyMap::Instance();
 
     clear();
     bool showLabel = (name != i18n("star") && !name.isEmpty());
     QString Name = name;
 
     if (Name.isEmpty())
         Name = i18n("Empty sky");
 
     addFancyLabel(Name);
     addFancyLabel(type);
     addFancyLabel(info);
     addFancyLabel(KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(obj));
 
     //Insert Rise/Set/Transit labels
     SkyObject *o = obj->clone();
     addSeparator();
     addFancyLabel(riseSetTimeLabel(o, true), -2);
     addFancyLabel(riseSetTimeLabel(o, false), -2);
     addFancyLabel(transitTimeLabel(o), -2);
     addSeparator();
     delete o;
 
     // Show 'Select this object' item when in object pointing mode and when obj is not empty sky
     if (map->isInObjectPointingMode() && obj->type() != 21)
     {
         addAction(i18n("Select this object"), map, SLOT(slotObjectSelected()));
     }
 
     //Insert item for centering on object
     addAction(i18n("Center && Track"), map, SLOT(slotCenter()));
 
     if (showFlags)
     {
         //Insert actions for flag operations
         initFlagActions(obj);
     }
 
     //Insert item for measuring distances
     //FIXME: add key shortcut to menu items properly!
     addAction(i18n("Angular Distance To...            ["), map, SLOT(slotBeginAngularDistance()));
     addAction(i18n("Starhop from here to...            "), map, SLOT(slotBeginStarHop()));
 
     //Insert item for Showing details dialog
     if (showDetails)
         addAction(i18nc("Show Detailed Information Dialog", "Details"), map, SLOT(slotDetail()));
     //Insert "Add/Remove Label" item
     if (showLabel)
     {
         if (map->isObjectLabeled(obj))
         {
             addAction(i18n("Remove Label"), map, SLOT(slotRemoveObjectLabel()));
         }
         else
         {
             addAction(i18n("Attach Label"), map, SLOT(slotAddObjectLabel()));
         }
     }
     // Should show observing list
     if (showObsList)
     {
         if (data->observingList()->contains(obj))
             addAction(i18n("Remove From Observing WishList"), data->observingList(), SLOT(slotRemoveObject()));
         else
             addAction(i18n("Add to Observing WishList"), data->observingList(), SLOT(slotAddObject()));
     }
     // Should we show trail actions
     TrailObject *t = dynamic_cast<TrailObject *>(obj);
     if (t)
     {
         if (t->hasTrail())
             addAction(i18n("Remove Trail"), map, SLOT(slotRemovePlanetTrail()));
         else
             addAction(i18n("Add Trail"), map, SLOT(slotAddPlanetTrail()));
     }
 
     addAction(i18n("Simulate eyepiece view"), map, SLOT(slotEyepieceView()));
 
     addSeparator();
 #ifdef HAVE_XPLANET
     if (obj->isSolarSystem() &&
         obj->type() !=
             SkyObject::COMET) // FIXME: We now have asteroids -- so should this not be isMajorPlanet() || Pluto?
     {
         //QMenu *xplanetSubmenu = new QMenu();
         //xplanetSubmenu->setTitle( i18n( "Print Xplanet view" ) );
         addAction(i18n("View in XPlanet"), map, SLOT(slotXplanetToWindow()));
         //xplanetSubmenu->addAction( i18n( "To file..." ), map, SLOT( slotXplanetToFile() ) );
         //addMenu( xplanetSubmenu );
     }
 #endif
     addSeparator();
     addINDI();
 
     addAction(i18n("View in What's Interesting"), this, SLOT(slotViewInWI()));
 }
 
 void KSPopupMenu::initFlagActions(SkyObject *obj)
 {
     KStars *ks = KStars::Instance();
 
     QList<int> flags = ks->data()->skyComposite()->flags()->getFlagsNearPix(obj, 5);
 
     if (flags.size() == 0)
     {
         // There is no flag around clicked SkyObject
         addAction(i18n("Add flag..."), ks->map(), SLOT(slotAddFlag()));
     }
 
     else if (flags.size() == 1)
     {
         // There is only one flag around clicked SkyObject
         addAction(i18n("Edit flag"), this, SLOT(slotEditFlag()));
         addAction(i18n("Delete flag"), this, SLOT(slotDeleteFlag()));
 
         m_CurrentFlagIdx = flags.first();
     }
 
     else
     {
         // There are more than one flags around clicked SkyObject - we need to create submenus
         QMenu *editMenu   = new QMenu(i18n("Edit flag..."), KStars::Instance());
         QMenu *deleteMenu = new QMenu(i18n("Delete flag..."), KStars::Instance());
 
         connect(editMenu, SIGNAL(triggered(QAction*)), this, SLOT(slotEditFlag(QAction*)));
         connect(deleteMenu, SIGNAL(triggered(QAction*)), this, SLOT(slotDeleteFlag(QAction*)));
 
         if (m_EditActionMapping)
         {
             delete m_EditActionMapping;
         }
 
         if (m_DeleteActionMapping)
         {
             delete m_DeleteActionMapping;
         }
 
         m_EditActionMapping   = new QHash<QAction *, int>;
         m_DeleteActionMapping = new QHash<QAction *, int>;
 
         foreach (int idx, flags)
         {
             QIcon flagIcon(QPixmap::fromImage(ks->data()->skyComposite()->flags()->image(idx)));
 
             QString flagLabel = ks->data()->skyComposite()->flags()->label(idx);
             if (flagLabel.size() > 35)
             {
                 flagLabel = flagLabel.left(35);
                 flagLabel.append("...");
             }
 
             QAction *editAction = new QAction(flagIcon, flagLabel, ks);
             editAction->setIconVisibleInMenu(true);
             editMenu->addAction(editAction);
             m_EditActionMapping->insert(editAction, idx);
 
             QAction *deleteAction = new QAction(flagIcon, flagLabel, ks);
             deleteAction->setIconVisibleInMenu(true);
             deleteMenu->addAction(deleteAction);
             m_DeleteActionMapping->insert(deleteAction, idx);
         }
 
         addMenu(editMenu);
         addMenu(deleteMenu);
     }
 }
 
 void KSPopupMenu::addLinksToMenu(SkyObject *obj, bool showDSS)
 {
     KStars *ks = KStars::Instance();
     QString sURL;
     QStringList::ConstIterator itList, itTitle, itListEnd;
 
     itList    = obj->ImageList().constBegin();
     itTitle   = obj->ImageTitle().constBegin();
     itListEnd = obj->ImageList().constEnd();
     if (!obj->ImageList().isEmpty())
     {
         QMenu *imageLinkSubMenu = new QMenu();
         imageLinkSubMenu->setTitle(i18n("Image Resources"));
         for (; itList != itListEnd; ++itList)
         {
             QString t = QString(*itTitle);
             sURL      = QString(*itList);
             imageLinkSubMenu->addAction(i18nc("Image/info menu item (should be translated)", t.toLocal8Bit()),
                                         ks->map(), SLOT(slotImage()));
             ++itTitle;
         }
         addMenu(imageLinkSubMenu);
     }
 
     if (showDSS)
     {
         addAction(i18nc("Sloan Digital Sky Survey", "Show SDSS Image"), ks->map(), SLOT(slotSDSS()));
         addAction(i18nc("Digitized Sky Survey", "Show DSS Image"), ks->map(), SLOT(slotDSS()));
     }
 
     if (showDSS)
         addSeparator();
 
     itList    = obj->InfoList().constBegin();
     itTitle   = obj->InfoTitle().constBegin();
     itListEnd = obj->InfoList().constEnd();
 
     if (!obj->InfoList().isEmpty())
     {
         QMenu *infoLinkSubMenu = new QMenu();
         infoLinkSubMenu->setTitle(i18n("Information Resources"));
         for (; itList != itListEnd; ++itList)
         {
             QString t = QString(*itTitle);
             sURL      = QString(*itList);
             infoLinkSubMenu->addAction(i18nc("Image/info menu item (should be translated)", t.toLocal8Bit()), ks->map(),
                                        SLOT(slotInfo()));
             ++itTitle;
         }
         addMenu(infoLinkSubMenu);
     }
 }
 
 void KSPopupMenu::addINDI()
 {
 #ifdef HAVE_INDI
 
     if (INDIListener::Instance()->size() == 0)
         return;
 
     foreach (ISD::GDInterface *gd, INDIListener::Instance()->getDevices())
     {
         INDI::BaseDevice *bd = gd->getBaseDevice();
 
         if (bd == nullptr)
             continue;
 
         //if (bd->isConnected() == false)
         //    continue;
 
         QMenu *menuDevice           = nullptr;
         ISD::GDInterface *telescope = nullptr;
 
         foreach (INDI::Property *pp, gd->getProperties())
         {
             if (pp->getType() != INDI_SWITCH || INDIListener::Instance()->isStandardProperty(pp->getName()) == false)
                 continue;
 
             QSignalMapper *sMapper = new QSignalMapper(this);
 
             ISwitchVectorProperty *svp = pp->getSwitch();
 
             for (int i = 0; i < svp->nsp; i++)
             {
                 if (menuDevice == nullptr)
                 {
                     menuDevice = new QMenu(gd->getDeviceName());
                     addMenu(menuDevice);
                 }
 
                 QAction *a = menuDevice->addAction(svp->sp[i].label);
 
                 ISD::GDSetCommand *cmd =
                     new ISD::GDSetCommand(INDI_SWITCH, pp->getName(), svp->sp[i].name, ISS_ON, this);
 
                 sMapper->setMapping(a, cmd);
 
                 connect(a, SIGNAL(triggered()), sMapper, SLOT(map()));
 
                 if (!strcmp(svp->sp[i].name, "SLEW") || !strcmp(svp->sp[i].name, "SYNC") ||
                     !strcmp(svp->sp[i].name, "TRACK"))
                 {
                     telescope = INDIListener::Instance()->getDevice(gd->getDeviceName());
 
                     if (telescope)
                     {
                         QSignalMapper *scopeMapper = new QSignalMapper(this);
                         scopeMapper->setMapping(a, INDI_SEND_COORDS);
 
                         connect(a, SIGNAL(triggered()), scopeMapper, SLOT(map()));
 
                         connect(scopeMapper, SIGNAL(mapped(int)), telescope, SLOT(runCommand(int)));
                     }
                 }
             }
 
             connect(sMapper, SIGNAL(mapped(QObject*)), gd, SLOT(setProperty(QObject*)));
 
             if (menuDevice != nullptr)
                 menuDevice->addSeparator();
         }
 
         if (telescope != nullptr && menuDevice != nullptr)
         {
             menuDevice->addSeparator();
 
             QAction *a = menuDevice->addAction(i18n("Center Crosshair"));
 
             QSignalMapper *scopeMapper = new QSignalMapper(this);
             scopeMapper->setMapping(a, INDI_ENGAGE_TRACKING);
             connect(a, SIGNAL(triggered()), scopeMapper, SLOT(map()));
             connect(scopeMapper, SIGNAL(mapped(int)), telescope, SLOT(runCommand(int)));
         }
     }
 
 #endif
 }
 
 void KSPopupMenu::addFancyLabel(const QString &name, int deltaFontSize)
 {
     if (name.isEmpty())
         return;
     QLabel *label = new QLabel("<b>" + name + "</b>", this);
     label->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
     if (deltaFontSize != 0)
     {
         QFont font = label->font();
         font.setPointSize(font.pointSize() + deltaFontSize);
         label->setFont(font);
     }
     QWidgetAction *act = new QWidgetAction(this);
     act->setDefaultWidget(label);
     addAction(act);
 }
 
 void KSPopupMenu::slotViewInWI()
 {
     if (!KStars::Instance()->map()->clickedObject())
         return;
     if (!KStars::Instance()->isWIVisible())
         KStars::Instance()->slotToggleWIView();
     KStars::Instance()->wiView()->inspectSkyObject(KStars::Instance()->map()->clickedObject());
 }
diff --git a/kstars/kstars.cpp b/kstars/kstars.cpp
index c5fbd5857..e9957da2b 100644
--- a/kstars/kstars.cpp
+++ b/kstars/kstars.cpp
@@ -1,622 +1,622 @@
 /***************************************************************************
                           kstars.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Mon Feb  5 01:11:45 PST 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "kstars.h"
 
 #include "config-kstars.h"
 #include "version.h"
 
 #include "fov.h"
 #include "kactionmenu.h"
 #include "kstarsadaptor.h"
 #include "kstarsdata.h"
 #include "kstarssplash.h"
 #include "observinglist.h"
 #include "Options.h"
 #include "skymap.h"
 #include "skyqpainter.h"
 #include "texturemanager.h"
 #include "dialogs/finddialog.h"
 #include "dialogs/exportimagedialog.h"
 #include "skycomponents/starblockfactory.h"
 #ifdef HAVE_INDI
 #include "ekos/ekosmanager.h"
 #include "indi/drivermanager.h"
 #include "indi/guimanager.h"
 #endif
 
 #ifdef HAVE_CFITSIO
 #include "fitsviewer/fitsviewer.h"
 #endif
 
 #include <KActionCollection>
 #include <KToolBar>
 
 #ifdef Q_OS_WIN
 #include <QProcess>
 #endif
 #include <QStatusBar>
 #include <QMenu>
 
 #include <kstars_debug.h>
 
 KStars *KStars::pinstance = nullptr;
 bool KStars::Closing = false;
 
 KStars::KStars(bool doSplash, bool clockrun, const QString &startdate)
     : KXmlGuiWindow(), StartClockRunning(clockrun), StartDateString(startdate)
 {
     setWindowTitle(i18n("KStars"));
 
 //On OS X, need to launch kdeinit5 so you can get KLauncher and KIOSlave so you can download new data.
 //Note:  You need to make sure the environment variables for KStars are set correctly to get this running properly.
 #ifdef Q_OS_OSX
     QProcess *klauncher = new QProcess(this);
     klauncher->start("kdeinit5");
 #endif
 
     // Initialize logging settings
     if (Options::disableLogging())
         KSUtils::Logging::Disable();
     else if (Options::logToFile())
         KSUtils::Logging::UseFile();
     else
         KSUtils::Logging::UseDefault();
 
     KSUtils::Logging::SyncFilterRules();
 
     qCInfo(KSTARS) << "Welcome to KStars" << KSTARS_VERSION;
     qCInfo(KSTARS) << "Build:" << KSTARS_BUILD_TS;
     qCInfo(KSTARS) << "OS:" << QSysInfo::productType();
     qCInfo(KSTARS) << "API:" << QSysInfo::buildAbi();
     qCInfo(KSTARS) << "Arch:" << QSysInfo::currentCpuArchitecture();
     qCInfo(KSTARS) << "Kernel Type:" << QSysInfo::kernelType();
     qCInfo(KSTARS) << "Kernel Version:" << QSysInfo::kernelVersion();
 
     new KstarsAdaptor(
         this); // NOTE the weird case convention, which cannot be changed as the file is generated by the moc.
 
 #ifdef Q_OS_OSX
 
     QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
     QString path            = env.value("PATH", "");
     env.insert("PATH", "/usr/bin:/usr/local/bin:\"" + QCoreApplication::applicationDirPath() + "\":" + path);
 
     QProcess dbusCheck;
     dbusCheck.setProcessEnvironment(env);
     dbusCheck.start("launchctl list");
     dbusCheck.waitForFinished();
     QString output(dbusCheck.readAllStandardOutput());
 
     QString pluginsDir = QDir(QCoreApplication::applicationDirPath() + "/../PlugIns").absolutePath();
     QString dbusPlist  = pluginsDir + "/dbus/org.freedesktop.dbus-kstars.plist";
     if (!output.contains("homebrew.mxcl.dbus") && !output.contains("org.freedesktop.dbus") &&
         QFileInfo(dbusPlist).exists())
     {
         QFile file(dbusPlist);
         if (file.open(QIODevice::ReadOnly))
         {
             QTextStream in(&file);
             QString pListText = in.readAll();
             file.close();
             int programArgsLeft         = pListText.indexOf("<key>ProgramArguments</key>");
             int programArgsRight        = pListText.indexOf("</array>", programArgsLeft) + 8 - programArgsLeft;
             QString currentProgramArgs  = pListText.mid(programArgsLeft, programArgsRight);
             QString newProgramArguments = ""
                                           "<key>ProgramArguments</key>\n"
                                           "    <array>\n"
                                           "        <string>" +
                                           QCoreApplication::applicationDirPath() +
                                           "/dbus-daemon</string>\n"
                                           "        <string>--nofork</string>\n"
                                           "        <string>--config-file=" +
                                           pluginsDir +
                                           "/dbus/kstars.conf</string>\n"
                                           "    </array>";
             pListText.replace(currentProgramArgs, newProgramArguments);
             if (file.open(QIODevice::WriteOnly))
             {
                 QTextStream stream(&file);
                 stream << pListText;
                 file.close();
 
                 dbusCheck.start("chmod 775 " + dbusPlist);
                 dbusCheck.waitForFinished();
                 dbusCheck.start("launchctl load -w \"" + dbusPlist + "\"");
                 dbusCheck.waitForFinished();
             }
         }
     }
 #endif
 
     QDBusConnection::sessionBus().registerObject("/KStars", this);
     QDBusConnection::sessionBus().registerService("org.kde.kstars");
 
 #ifdef HAVE_CFITSIO
     m_GenericFITSViewer.clear();
 #endif
 
 #ifdef HAVE_INDI
     m_EkosManager.clear();
 #endif
 
     // Set pinstance to yourself
     pinstance = this;
 
     connect(qApp, SIGNAL(aboutToQuit()), this, SLOT(slotAboutToQuit()));
 
     //Initialize QActionGroups
     projectionGroup = new QActionGroup(this);
     cschemeGroup    = new QActionGroup(this);
     hipsGroup       = new QActionGroup(this);
     telescopeGroup  = new QActionGroup(this);
     telescopeGroup->setExclusive(false);
 
     m_KStarsData = KStarsData::Create();
     Q_ASSERT(m_KStarsData);
     //Set Geographic Location from Options
     m_KStarsData->setLocationFromOptions();
 
     //Initialize Time and Date
     bool datetimeSet=false;
     if (StartDateString.isEmpty() == false)
     {
         KStarsDateTime startDate = KStarsDateTime::fromString(StartDateString);
         if (startDate.isValid())
             data()->changeDateTime(data()->geo()->LTtoUT(startDate));
         else
             data()->changeDateTime(KStarsDateTime::currentDateTimeUtc());
 
         datetimeSet=true;
     }
     // JM 2016-11-15: Not need to set it again as it was initialized in the ctor of SimClock
     /*
     else
         data()->changeDateTime( KStarsDateTime::currentDateTimeUtc() );
     */
 
     // Initialize clock. If --paused is not in the comand line, look in options
     if (clockrun)
         StartClockRunning = Options::runClock();
     // If we are starting paused, we need to change datetime in data
     if (StartClockRunning == false)
     {
         qDebug() << "KStars is started in paused state.";
         if (datetimeSet == false)
             data()->changeDateTime(KStarsDateTime::currentDateTimeUtc());
     }
 
     // Setup splash screen
-    KStarsSplash *splash = 0;
+    KStarsSplash *splash = nullptr;
     if (doSplash)
     {
-        splash = new KStarsSplash(0);
+        splash = new KStarsSplash(nullptr);
         connect(m_KStarsData, SIGNAL(progressText(QString)), splash, SLOT(setMessage(QString)));
         splash->show();
     }
     else
     {
         connect(m_KStarsData, SIGNAL(progressText(QString)), m_KStarsData, SLOT(slotConsoleMessage(QString)));
     }
 
     //set up Dark color scheme for application windows
     DarkPalette = QPalette(QColor("black"), QColor("black"));
     DarkPalette.setColor(QPalette::Inactive, QPalette::WindowText, QColor("red"));
     DarkPalette.setColor(QPalette::Normal, QPalette::WindowText, QColor("red"));
     DarkPalette.setColor(QPalette::Normal, QPalette::Base, QColor("black"));
     DarkPalette.setColor(QPalette::Normal, QPalette::Text, QColor(238, 0, 0));
     DarkPalette.setColor(QPalette::Normal, QPalette::Highlight, QColor(238, 0, 0));
     DarkPalette.setColor(QPalette::Normal, QPalette::HighlightedText, QColor("black"));
     DarkPalette.setColor(QPalette::Inactive, QPalette::Text, QColor(238, 0, 0));
     DarkPalette.setColor(QPalette::Inactive, QPalette::Base, QColor(30, 10, 10));
     //store original color scheme
     OriginalPalette = QApplication::palette();
 
     //Initialize data.  When initialization is complete, it will run dataInitFinished()
     if (!m_KStarsData->initialize())
         return;
     delete splash;
     datainitFinished();
 
 #if (__GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1 && !defined(__UCLIBC__))
     qDebug() << "glibc >= 2.1 detected.  Using GNU extension sincos()";
 #else
     qDebug() << "Did not find glibc >= 2.1.  Will use ANSI-compliant sin()/cos() functions.";
 #endif
 }
 
 KStars *KStars::createInstance(bool doSplash, bool clockrun, const QString &startdate)
 {
     delete pinstance;
     // pinstance is set directly in constructor.
     new KStars(doSplash, clockrun, startdate);
     Q_ASSERT(pinstance && "pinstance must be non NULL");
     return pinstance;
 }
 
 KStars::~KStars()
 {
     releaseResources();
     Q_ASSERT(pinstance);
     pinstance = nullptr;
 #ifdef PROFILE_COORDINATE_CONVERSION
     qDebug() << "Spent " << SkyPoint::cpuTime_EqToHz << " seconds in " << SkyPoint::eqToHzCalls
              << " calls to SkyPoint::EquatorialToHorizontal, for an average of "
              << 1000. * (SkyPoint::cpuTime_EqToHz / SkyPoint::eqToHzCalls) << " ms per call";
 #endif
 
 #ifdef COUNT_DMS_SINCOS_CALLS
     qDebug() << "Constructed " << dms::dms_constructor_calls << " dms objects, of which " << dms::dms_with_sincos_called
              << " had trigonometric functions called on them = "
              << (float(dms::dms_with_sincos_called) / float(dms::dms_constructor_calls)) * 100. << "%";
     qDebug() << "Of the " << dms::trig_function_calls << " calls to sin/cos/sincos on dms objects, "
              << dms::redundant_trig_function_calls << " were redundant = "
              << ((float(dms::redundant_trig_function_calls) / float(dms::trig_function_calls)) * 100.) << "%";
     qDebug() << "We had " << CachingDms::cachingdms_bad_uses << " bad uses of CachingDms in all, compared to "
              << CachingDms::cachingdms_constructor_calls << " constructed CachingDms objects = "
              << (float(CachingDms::cachingdms_bad_uses) / float(CachingDms::cachingdms_constructor_calls)) * 100.
              << "% bad uses";
 #endif
 
 /* BUG 366596: Some KDE applications processes remain as background (zombie) processes after closing
      * No solution to this bug so far using Qt 5.8 as of 2016-11-24
      * Therefore, the only way to solve this on Windows is to explicitly kill kstars.exe
      * Hopefully we do not need this hack once the above bug is resolved.
      */
 #ifdef Q_OS_WIN
     QProcess::execute("taskkill /im kstars.exe /f");
 #endif
 }
 
 void KStars::releaseResources()
 {
     delete m_KStarsData;
     m_KStarsData = nullptr;
     delete StarBlockFactory::Instance();
     TextureManager::Release();
     SkyQPainter::releaseImageCache();
     FOVManager::releaseCache();
 
 #ifdef HAVE_INDI
     delete m_EkosManager;
     m_EkosManager = nullptr;
 //    GUIManager::Instance()->close();
 #endif
 
     QSqlDatabase::removeDatabase("userdb");
     QSqlDatabase::removeDatabase("skydb");
 }
 
 void KStars::clearCachedFindDialog()
 {
     if (m_FindDialog) // dialog is cached
     {
         /** Delete findDialog only if it is not opened */
         if (m_FindDialog->isHidden())
         {
             delete m_FindDialog;
-            m_FindDialog     = 0;
+            m_FindDialog     = nullptr;
             DialogIsObsolete = false;
         }
         else
             DialogIsObsolete = true; // dialog was opened so it could not deleted
     }
 }
 
 void KStars::applyConfig(bool doApplyFocus)
 {
     if (Options::isTracking())
     {
         actionCollection()->action("track_object")->setText(i18n("Stop &Tracking"));
         actionCollection()
             ->action("track_object")
             ->setIcon(QIcon::fromTheme("document-encrypt", QIcon(":/icons/breeze/default/document-encrypt.svg")));
     }
 
     actionCollection()
         ->action("coordsys")
         ->setText(Options::useAltAz() ? i18n("Switch to star globe view (Equatorial &Coordinates)") :
                                         i18n("Switch to horizonal view (Horizontal &Coordinates)"));
 
     actionCollection()->action("show_time_box")->setChecked(Options::showTimeBox());
     actionCollection()->action("show_location_box")->setChecked(Options::showGeoBox());
     actionCollection()->action("show_focus_box")->setChecked(Options::showFocusBox());
     actionCollection()->action("show_statusBar")->setChecked(Options::showStatusBar());
     actionCollection()->action("show_sbAzAlt")->setChecked(Options::showAltAzField());
     actionCollection()->action("show_sbRADec")->setChecked(Options::showRADecField());
     actionCollection()->action("show_sbJ2000RADec")->setChecked(Options::showJ2000RADecField());
     actionCollection()->action("show_stars")->setChecked(Options::showStars());
     actionCollection()->action("show_deepsky")->setChecked(Options::showDeepSky());
     actionCollection()->action("show_planets")->setChecked(Options::showSolarSystem());
     actionCollection()->action("show_clines")->setChecked(Options::showCLines());
     actionCollection()->action("show_constellationart")->setChecked(Options::showConstellationArt());
     actionCollection()->action("show_cnames")->setChecked(Options::showCNames());
     actionCollection()->action("show_cbounds")->setChecked(Options::showCBounds());
     actionCollection()->action("show_mw")->setChecked(Options::showMilkyWay());
     actionCollection()->action("show_equatorial_grid")->setChecked(Options::showEquatorialGrid());
     actionCollection()->action("show_horizontal_grid")->setChecked(Options::showHorizontalGrid());
     actionCollection()->action("show_horizon")->setChecked(Options::showGround());
     actionCollection()->action("show_flags")->setChecked(Options::showFlags());
     actionCollection()->action("show_supernovae")->setChecked(Options::showSupernovae());
     actionCollection()->action("show_satellites")->setChecked(Options::showSatellites());
     statusBar()->setVisible(Options::showStatusBar());
 
     //color scheme
     m_KStarsData->colorScheme()->loadFromConfig();
     QApplication::setPalette(Options::darkAppColors() ? DarkPalette : OriginalPalette);
 
 //Note:  This uses style sheets to set the dark colors, this should be cross platform.  Palettes have a different behavior on OS X and Windows as opposed to Linux.
 //It might be a good idea to use stylesheets in the future instead of palettes but this will work for now for OS X.
 //This is also in KStarsDbus.cpp.  If you change it, change it in BOTH places.
 #ifdef Q_OS_OSX
     if (Options::darkAppColors())
         qApp->setStyleSheet(
             "QWidget { background-color: black; color:red; "
             "selection-background-color:rgb(30,30,30);selection-color:white}"
             "QToolBar { border:none }"
             "QTabBar::tab:selected { background-color:rgb(50,50,50) }"
             "QTabBar::tab:!selected { background-color:rgb(30,30,30) }"
             "QPushButton { background-color:rgb(50,50,50);border-width:1px; border-style:solid;border-color:black}"
             "QPushButton::disabled { background-color:rgb(10,10,10);border-width:1px; "
             "border-style:solid;border-color:black }"
             "QToolButton:Checked { background-color:rgb(30,30,30); border:none }"
             "QComboBox { background-color:rgb(30,30,30); }"
             "QComboBox::disabled { background-color:rgb(10,10,10) }"
             "QScrollBar::handle { background: rgb(30,30,30) }"
             "QSpinBox { border-width: 1px; border-style:solid; border-color:rgb(30,30,30) }"
             "QDoubleSpinBox { border-width:1px; border-style:solid; border-color:rgb(30,30,30) }"
             "QLineEdit { border-width: 1px; border-style: solid; border-color:rgb(30,30,30) }"
             "QCheckBox::indicator:unchecked { background-color:rgb(30,30,30);border-width:1px; "
             "border-style:solid;border-color:black }"
             "QCheckBox::indicator:checked { background-color:red;border-width:1px; "
             "border-style:solid;border-color:black }"
             "QRadioButton::indicator:unchecked { background-color:rgb(30,30,30) }"
             "QRadioButton::indicator:checked { background-color:red }"
             "QRoundProgressBar { alternate-background-color:black }"
             "QDateTimeEdit {background-color:rgb(30,30,30); border-width: 1px; border-style:solid; "
             "border-color:rgb(30,30,30) }"
             "QHeaderView { color:red;background-color:black }"
             "QHeaderView::Section { background-color:rgb(30,30,30) }"
             "QTableCornerButton::section{ background-color:rgb(30,30,30) }"
             "");
     else
         qApp->setStyleSheet("");
 #endif
 
     //Set toolbar options from config file
     toolBar("kstarsToolBar")->applySettings(KSharedConfig::openConfig()->group("MainToolBar"));
     toolBar("viewToolBar")->applySettings(KSharedConfig::openConfig()->group("ViewToolBar"));
 
     //Geographic location
     data()->setLocationFromOptions();
 
     //Focus
     if (doApplyFocus)
     {
         SkyObject *fo = data()->objectNamed(Options::focusObject());
         if (fo && fo != map()->focusObject())
         {
             map()->setClickedObject(fo);
             map()->setClickedPoint(fo);
             map()->slotCenter();
         }
 
         if (!fo)
         {
             SkyPoint fp(Options::focusRA(), Options::focusDec());
             if (fp.ra().Degrees() != map()->focus()->ra().Degrees() ||
                 fp.dec().Degrees() != map()->focus()->dec().Degrees())
             {
                 map()->setClickedPoint(&fp);
                 map()->slotCenter();
             }
         }
     }
 }
 
 void KStars::showImgExportDialog()
 {
     if (m_ExportImageDialog)
         m_ExportImageDialog->show();
 }
 
 void KStars::syncFOVActions()
 {
     foreach (QAction *action, fovActionMenu->menu()->actions())
     {
         if (action->text().isEmpty())
         {
             continue;
         }
 
         if (Options::fOVNames().contains(action->text().remove(0, 1)))
         {
             action->setChecked(true);
         }
         else
         {
             action->setChecked(false);
         }
     }
 }
 
 void KStars::hideAllFovExceptFirst()
 {
     // When there is only one visible FOV symbol, we don't need to do anything
     // Also, don't do anything if there are no available FOV symbols.
     if (data()->visibleFOVs.size() == 1 || data()->availFOVs.size() == 0)
     {
         return;
     }
     else
     {
         // If there are no visible FOVs, select first available
         if (data()->visibleFOVs.size() == 0)
         {
             Q_ASSERT(!data()->availFOVs.isEmpty());
             Options::setFOVNames(QStringList(data()->availFOVs.first()->name()));
         }
         else
         {
             Options::setFOVNames(QStringList(data()->visibleFOVs.first()->name()));
         }
 
         // Sync FOV and update skymap
         data()->syncFOV();
         syncFOVActions();
         map()->update(); // SkyMap::forceUpdate() is not required, as FOVs are drawn as overlays
     }
 }
 
 void KStars::selectNextFov()
 {
     if (data()->getVisibleFOVs().isEmpty())
         return;
 
     Q_ASSERT(!data()
                   ->getAvailableFOVs()
                   .isEmpty()); // The available FOVs had better not be empty if the visible ones are not.
 
     FOV *currentFov = data()->getVisibleFOVs().first();
     int currentIdx  = data()->availFOVs.indexOf(currentFov);
 
     // If current FOV is not the available FOV list or there is only 1 FOV available, then return
     if (currentIdx == -1 || data()->availFOVs.size() < 2)
     {
         return;
     }
 
     QStringList nextFovName;
     if (currentIdx == data()->availFOVs.size() - 1)
     {
         nextFovName << data()->availFOVs.first()->name();
     }
     else
     {
         nextFovName << data()->availFOVs.at(currentIdx + 1)->name();
     }
 
     Options::setFOVNames(nextFovName);
     data()->syncFOV();
     syncFOVActions();
     map()->update();
 }
 
 void KStars::selectPreviousFov()
 {
     if (data()->getVisibleFOVs().isEmpty())
         return;
 
     Q_ASSERT(!data()
                   ->getAvailableFOVs()
                   .isEmpty()); // The available FOVs had better not be empty if the visible ones are not.
 
     FOV *currentFov = data()->getVisibleFOVs().first();
     int currentIdx  = data()->availFOVs.indexOf(currentFov);
 
     // If current FOV is not the available FOV list or there is only 1 FOV available, then return
     if (currentIdx == -1 || data()->availFOVs.size() < 2)
     {
         return;
     }
 
     QStringList prevFovName;
     if (currentIdx == 0)
     {
         prevFovName << data()->availFOVs.last()->name();
     }
     else
     {
         prevFovName << data()->availFOVs.at(currentIdx - 1)->name();
     }
 
     Options::setFOVNames(prevFovName);
     data()->syncFOV();
     syncFOVActions();
     map()->update();
 }
 
 //FIXME Port to QML2
 //#if 0
 void KStars::showWISettingsUI()
 {
     slotWISettings();
 }
 //#endif
 
 void KStars::updateTime(const bool automaticDSTchange)
 {
     // Due to frequently use of this function save data and map pointers for speedup.
     // Save options and geo() to a pointer would not speedup because most of time options
     // and geo will accessed only one time.
     KStarsData *Data = data();
     // dms oldLST( Data->lst()->Degrees() );
 
     Data->updateTime(Data->geo(), automaticDSTchange);
 
     //We do this outside of kstarsdata just to get the coordinates
     //displayed in the infobox to update every second.
     //	if ( !Options::isTracking() && LST()->Degrees() > oldLST.Degrees() ) {
     //		int nSec = int( 3600.*( LST()->Hours() - oldLST.Hours() ) );
     //		Map->focus()->setRA( Map->focus()->ra().Hours() + double( nSec )/3600. );
     //		if ( Options::useAltAz() ) Map->focus()->EquatorialToHorizontal( LST(), geo()->lat() );
     //		Map->showFocusCoords();
     //	}
 
     //If time is accelerated beyond slewTimescale, then the clock's timer is stopped,
     //so that it can be ticked manually after each update, in order to make each time
     //step exactly equal to the timeScale setting.
     //Wrap the call to manualTick() in a singleshot timer so that it doesn't get called until
     //the skymap has been completely updated.
     if (Data->clock()->isManualMode() && Data->clock()->isActive())
     {
         QTimer::singleShot(0, Data->clock(), SLOT(manualTick()));
     }
 }
 
 #ifdef HAVE_CFITSIO
 FITSViewer *KStars::genericFITSViewer()
 {
     if (m_GenericFITSViewer.isNull())
     {
         m_GenericFITSViewer = new FITSViewer(Options::independentWindowFITS() ? nullptr : this);
         m_GenericFITSViewer->setAttribute(Qt::WA_DeleteOnClose);
 
         m_FITSViewers.append(m_GenericFITSViewer);
     }
 
     return m_GenericFITSViewer;
 }
 #endif
 
 #ifdef HAVE_INDI
 EkosManager *KStars::ekosManager()
 {
     if (m_EkosManager.isNull())
         m_EkosManager = new EkosManager(Options::independentWindowEkos() ? nullptr : this);
 
     return m_EkosManager;
 }
 
 #endif
 
 void KStars::closeEvent(QCloseEvent *event)
 {
     KStars::Closing = true;
     QWidget::closeEvent(event);
 }
 
diff --git a/kstars/kstarsactions.cpp b/kstars/kstarsactions.cpp
index 40efa97fc..0c1d7158a 100644
--- a/kstars/kstarsactions.cpp
+++ b/kstars/kstarsactions.cpp
@@ -1,1936 +1,1936 @@
 /***************************************************************************
                           kstarsactions.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Mon Feb 25 2002
     copyright            : (C) 2002 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 // This file contains function definitions for Actions declared in kstars.h
 
 #include "kstars.h"
 
 #include "imageexporter.h"
 #include "kstarsdata.h"
 #include "kswizard.h"
 #include "Options.h"
 #include "skymap.h"
 #include "dialogs/exportimagedialog.h"
 #include "dialogs/finddialog.h"
 #include "dialogs/focusdialog.h"
 #include "dialogs/fovdialog.h"
 #include "dialogs/locationdialog.h"
 #include "dialogs/timedialog.h"
 #include "oal/execute.h"
 #include "options/opsadvanced.h"
 #include "options/opscatalog.h"
 #include "options/opscolors.h"
 #include "options/opsguides.h"
 #include "options/opssatellites.h"
 #include "options/opssolarsystem.h"
 #include "options/opssupernovae.h"
 #include "printing/printingwizard.h"
 #include "projections/projector.h"
 #include "skycomponents/asteroidscomponent.h"
 #include "skycomponents/cometscomponent.h"
 #include "skycomponents/satellitescomponent.h"
 #include "skycomponents/skymapcomposite.h"
 #include "skycomponents/solarsystemcomposite.h"
 #include "skycomponents/supernovaecomponent.h"
 #include "tools/adddeepskyobject.h"
 #include "tools/altvstime.h"
 #include "tools/astrocalc.h"
 #include "tools/eyepiecefield.h"
 #include "tools/flagmanager.h"
 #include "tools/horizonmanager.h"
 #include "tools/observinglist.h"
 #include "tools/planetviewer.h"
 #include "tools/scriptbuilder.h"
 #include "tools/skycalendar.h"
 #include "tools/wutdialog.h"
 #include "tools/polarishourangle.h"
 #include "tools/whatsinteresting/wiequipsettings.h"
 #include "tools/whatsinteresting/wilpsettings.h"
 #include "tools/whatsinteresting/wiview.h"
 #include "hips/hipsmanager.h"
 
 #ifdef HAVE_INDI
 #include <basedevice.h>
 #include "indi/telescopewizardprocess.h"
 #include "indi/opsindi.h"
 #include "indi/drivermanager.h"
 #include "indi/guimanager.h"
 #include "indi/indilistener.h"
 #endif
 
 #ifdef HAVE_CFITSIO
 #include "fitsviewer/fitsviewer.h"
 #include "fitsviewer/opsfits.h"
 #ifdef HAVE_INDI
 #include "ekos/ekosmanager.h"
 #include "ekos/opsekos.h"
 #endif
 #endif
 
 #ifdef HAVE_XPLANET
 #include "xplanet/opsxplanet.h"
 #endif
 
 #ifdef HAVE_NOTIFYCONFIG
 #include <KNotifyConfigWidget>
 #endif
 #include <KActionCollection>
 #include <KActionMenu>
 #include <KTipDialog>
 #include <kns3/downloaddialog.h>
 
 #include <QQuickWindow>
 #include <QQuickView>
 
 #include <KToggleAction>
 
 #ifdef _WIN32
 #include <windows.h>
 #undef interface
 #endif
 #include <sys/stat.h>
 
 #include "kstars_debug.h"
 
 /** ViewToolBar Action.  All of the viewToolBar buttons are connected to this slot. **/
 
 void KStars::slotViewToolBar()
 {
     KToggleAction *a   = (KToggleAction *)sender();
     KConfigDialog *kcd = KConfigDialog::exists("settings");
 
     if (a == actionCollection()->action("show_stars"))
     {
         Options::setShowStars(a->isChecked());
         if (kcd)
         {
             opcatalog->kcfg_ShowStars->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_deepsky"))
     {
         Options::setShowDeepSky(a->isChecked());
         if (kcd)
         {
             opcatalog->kcfg_ShowDeepSky->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_planets"))
     {
         Options::setShowSolarSystem(a->isChecked());
         if (kcd)
         {
             opsolsys->kcfg_ShowSolarSystem->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_clines"))
     {
         Options::setShowCLines(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowCLines->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_cnames"))
     {
         Options::setShowCNames(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowCNames->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_cbounds"))
     {
         Options::setShowCBounds(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowCBounds->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_constellationart"))
     {
         Options::setShowConstellationArt(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowConstellationArt->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_mw"))
     {
         Options::setShowMilkyWay(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowMilkyWay->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_equatorial_grid"))
     {
         // if autoSelectGrid is selected and the user clicked the
         // show_equatorial_grid button, he probably wants us to disable
         // the autoSelectGrid and display the equatorial grid.
         Options::setAutoSelectGrid(false);
         Options::setShowEquatorialGrid(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowEquatorialGrid->setChecked(a->isChecked());
             opguides->kcfg_AutoSelectGrid->setChecked(false);
         }
     }
     else if (a == actionCollection()->action("show_horizontal_grid"))
     {
         Options::setAutoSelectGrid(false);
         Options::setShowHorizontalGrid(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowHorizontalGrid->setChecked(a->isChecked());
             opguides->kcfg_AutoSelectGrid->setChecked(false);
         }
     }
     else if (a == actionCollection()->action("show_horizon"))
     {
         Options::setShowGround(a->isChecked());
         if (!a->isChecked() && Options::useRefraction())
         {
             QString caption = i18n("Refraction effects disabled");
             QString message = i18n("When the horizon is switched off, refraction effects are temporarily disabled.");
 
             KMessageBox::information(this, message, caption, "dag_refract_hide_ground");
         }
         if (kcd)
         {
             opguides->kcfg_ShowGround->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_flags"))
     {
         Options::setShowFlags(a->isChecked());
         if (kcd)
         {
             opguides->kcfg_ShowFlags->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_satellites"))
     {
         Options::setShowSatellites(a->isChecked());
         if (kcd)
         {
             opssatellites->kcfg_ShowSatellites->setChecked(a->isChecked());
         }
     }
     else if (a == actionCollection()->action("show_supernovae"))
     {
         Options::setShowSupernovae(a->isChecked());
         if (kcd)
         {
             opssupernovae->kcfg_ShowSupernovae->setChecked(a->isChecked());
         }
     }
 
     // update time for all objects because they might be not initialized
     // it's needed when using horizontal coordinates
     data()->setFullTimeUpdate();
     updateTime();
 
     map()->forceUpdate();
 }
 
 void KStars::slotINDIToolBar()
 {
 #ifdef HAVE_INDI
     KToggleAction *a = (KToggleAction *)sender();
 
     if (a == actionCollection()->action("show_control_panel"))
     {
         if (a->isChecked())
         {
             GUIManager::Instance()->raise();
             GUIManager::Instance()->activateWindow();
             GUIManager::Instance()->showNormal();
         }
         else
             GUIManager::Instance()->hide();
     }
     else if (a == actionCollection()->action("show_ekos"))
     {
         if (a->isChecked())
         {
             ekosManager()->raise();
             ekosManager()->activateWindow();
             ekosManager()->showNormal();
         }
         else
             ekosManager()->hide();
     }
     else if (a == actionCollection()->action("lock_telescope"))
     {
         if (INDIListener::Instance()->size() == 0)
         {
             KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
             return;
         }
 
         ISD::GDInterface *oneScope = nullptr;
 
         foreach (ISD::GDInterface *gd, INDIListener::Instance()->getDevices())
         {
             INDI::BaseDevice *bd = gd->getBaseDevice();
 
             if (gd->getType() != KSTARS_TELESCOPE)
                 continue;
 
             if (bd == nullptr)
                 continue;
 
             if (bd->isConnected() == false)
             {
                 KMessageBox::error(
                     0, i18n("Telescope %1 is offline. Please connect and retry again.", gd->getDeviceName()));
                 return;
             }
 
             oneScope = gd;
             break;
         }
 
         if (oneScope == nullptr)
         {
             KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
             return;
         }
 
         if (a->isChecked())
             oneScope->runCommand(INDI_CENTER_LOCK);
         else
             oneScope->runCommand(INDI_CENTER_UNLOCK);
     }
     else if (a == actionCollection()->action("show_fits_viewer"))
     {
         if (m_FITSViewers.isEmpty())
         {
             a->setEnabled(false);
             return;
         }
 
         if (a->isChecked())
         {
             foreach (FITSViewer *view, m_FITSViewers)
             {
                 if (view->getTabs().empty() == false)
                 {
                     view->raise();
                     view->activateWindow();
                     view->showNormal();
                 }
             }
         }
         else
         {
             foreach (FITSViewer *view, m_FITSViewers)
             {
                 view->hide();
             }
         }
     }
 
 #endif
 }
 
 void KStars::slotSetTelescopeEnabled(bool enable)
 {
     telescopeGroup->setEnabled(enable);
     if (enable == false)
     {
         for(QAction *a : telescopeGroup->actions())
         {
             a->setChecked(false);
         }
     }
 }
 
 /** Major Dialog Window Actions **/
 
 void KStars::slotCalculator()
 {
     if (!m_AstroCalc)
         m_AstroCalc = new AstroCalc(this);
     m_AstroCalc->show();
 }
 
 void KStars::slotWizard()
 {
     QPointer<KSWizard> wizard = new KSWizard(this);
     if (wizard->exec() == QDialog::Accepted)
     {
         Options::setRunStartupWizard(false); //don't run on startup next time
         updateLocationFromWizard(*(wizard->geo()));
     }
     delete wizard;
 }
 
 void KStars::updateLocationFromWizard(const GeoLocation& geo)
 {
     data()->setLocation(geo);
     // adjust local time to keep UT the same.
     // create new LT without DST offset
     KStarsDateTime ltime = data()->geo()->UTtoLT(data()->ut());
 
     // reset timezonerule to compute next dst change
     data()->geo()->tzrule()->reset_with_ltime(ltime, data()->geo()->TZ0(), data()->isTimeRunningForward());
 
     // reset next dst change time
     data()->setNextDSTChange(data()->geo()->tzrule()->nextDSTChange());
 
     // reset local sideral time
     data()->syncLST();
 
     // Make sure Numbers, Moon, planets, and sky objects are updated immediately
     data()->setFullTimeUpdate();
 
     // If the sky is in Horizontal mode and not tracking, reset focus such that
     // Alt/Az remain constant.
     if (!Options::isTracking() && Options::useAltAz())
     {
         map()->focus()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
     }
 
     // recalculate new times and objects
     data()->setSnapNextFocus();
     updateTime();
 }
 
 void KStars::slotDownload()
 {
     // 2017-07-04: Explicitly load kstars.knsrc from resources file
     QPointer<KNS3::DownloadDialog> dlg(new KNS3::DownloadDialog(":/kconfig/kstars.knsrc", this));
     dlg->exec();
 
     // Get the list of all the installed entries.
     KNS3::Entry::List installed_entries;
     KNS3::Entry::List changed_entries;
     if (dlg)
     {
         installed_entries = dlg->installedEntries();
         changed_entries   = dlg->changedEntries();
     }
 
     delete dlg;
 
     foreach (const KNS3::Entry &entry, installed_entries)
     {
         foreach (const QString &name, entry.installedFiles())
         {
             if (name.endsWith(QLatin1String(".cat")))
             {
                 data()->catalogdb()->AddCatalogContents(name);
                 // To start displaying the custom catalog, add it to SkyMapComposite
 
                 QString catalogName = data()->catalogdb()->GetCatalogName(name);
                 Options::setShowCatalogNames(Options::showCatalogNames() << catalogName);
                 Options::setCatalogFile(Options::catalogFile() << name);
                 Options::setShowCatalog(Options::showCatalog() << 1);
             }
         }
 
         KStars::Instance()->data()->skyComposite()->reloadDeepSky();
         // update time for all objects because they might be not initialized
         // it's needed when using horizontal coordinates
         KStars::Instance()->data()->setFullTimeUpdate();
         KStars::Instance()->updateTime();
         KStars::Instance()->map()->forceUpdate();
     }
 
     foreach (const KNS3::Entry &entry, changed_entries)
     {
         foreach (const QString &name, entry.uninstalledFiles())
         {
             if (name.endsWith(QLatin1String(".cat")))
             {
                 data()->catalogdb()->RemoveCatalog(name);
                 // To start displaying the custom catalog, add it to SkyMapComposite
                 QStringList catFile = Options::catalogFile();
                 catFile.removeOne(name);
                 Options::setCatalogFile(catFile);
             }
         }
     }
 }
 
 void KStars::slotAVT()
 {
     if (!m_AltVsTime)
         m_AltVsTime = new AltVsTime(this);
     m_AltVsTime->show();
 }
 
 void KStars::slotWUT()
 {
     if (!m_WUTDialog)
         m_WUTDialog = new WUTDialog(this);
     m_WUTDialog->show();
 }
 
 //FIXME Port to QML2
 //#if 0
 void KStars::slotWISettings()
 {
     if (!m_WIView)
         slotToggleWIView();
     if (m_WIView && !m_wiDock->isVisible())
         slotToggleWIView();
 
     if (KConfigDialog::showDialog("wisettings"))
     {
         m_WIEquipmentSettings->populateScopeListWidget();
         return;
     }
 
     KConfigDialog *dialog = new KConfigDialog(this, "wisettings", Options::self());
 
     connect(dialog, SIGNAL(settingsChanged(QString)), this, SLOT(slotApplyWIConfigChanges()));
 
     m_WISettings          = new WILPSettings(this);
     m_WIEquipmentSettings = new WIEquipSettings();
     dialog->addPage(m_WISettings, i18n("Light Pollution Settings"));
     dialog->addPage(m_WIEquipmentSettings, i18n("Equipment Settings - Equipment Type and Parameters"));
     dialog->exec();
     if (m_WIEquipmentSettings)
         m_WIEquipmentSettings->setAperture(); //Something isn't working with this!
 }
 
 void KStars::slotToggleWIView()
 {
     if (KStars::Closing)
         return;
 
     if (!m_WIView)
     {
-        m_WIView = new WIView(0);
+        m_WIView = new WIView(nullptr);
         m_wiDock = new QDockWidget(this);
         m_wiDock->setStyleSheet("QDockWidget::title{background-color:black;}");
         m_wiDock->setObjectName("What's Interesting");
         m_wiDock->setAllowedAreas(Qt::RightDockWidgetArea);
         QWidget *container = QWidget::createWindowContainer(m_WIView->getWIBaseView());
         m_wiDock->setWidget(container);
         m_wiDock->setMinimumWidth(400);
         addDockWidget(Qt::RightDockWidgetArea, m_wiDock);
         connect(m_wiDock, SIGNAL(visibilityChanged(bool)), actionCollection()->action("show_whatsinteresting"),
                 SLOT(setChecked(bool)));
         m_wiDock->setVisible(true);
     }
     else
     {
         m_wiDock->setVisible(!m_wiDock->isVisible());
     }
 }
 
 void KStars::slotCalendar()
 {
     if (!m_SkyCalendar)
         m_SkyCalendar = new SkyCalendar(this);
     m_SkyCalendar->show();
 }
 
 void KStars::slotGlossary()
 {
     // 	GlossaryDialog *dlg = new GlossaryDialog( this, true );
     // 	QString glossaryfile =data()->stdDirs->findResource( "data", "kstars/glossary.xml" );
     // 	QUrl u = glossaryfile;
     // 	Glossary *g = new Glossary( u );
     // 	g->setName( i18n( "Knowledge" ) );
     // 	dlg->addGlossary( g );
     // 	dlg->show();
 }
 
 void KStars::slotScriptBuilder()
 {
     if (!m_ScriptBuilder)
         m_ScriptBuilder = new ScriptBuilder(this);
     m_ScriptBuilder->show();
 }
 
 void KStars::slotSolarSystem()
 {
     if (!m_PlanetViewer)
         m_PlanetViewer = new PlanetViewer(this);
     m_PlanetViewer->show();
 }
 /*
 void KStars::slotJMoonTool() {
     if ( ! m_JMoonTool ) m_JMoonTool = new JMoonTool(this);
     m_JMoonTool->show();
 }
 */
 
 void KStars::slotMoonPhaseTool()
 {
     //FIXME Port to KF5
     //if( ! mpt ) mpt = new MoonPhaseTool( this );
     //mpt->show();
 }
 
 void KStars::slotFlagManager()
 {
     if (!m_FlagManager)
         m_FlagManager = new FlagManager(this);
     m_FlagManager->show();
 }
 
 void KStars::slotTelescopeWizard()
 {
 #ifdef HAVE_INDI
 #ifndef Q_OS_WIN
 
     QString indiServerDir = Options::indiServer();
 
 #ifdef Q_OS_OSX
     if (Options::indiServerIsInternal())
         indiServerDir = QCoreApplication::applicationDirPath() + "/indi";
     else
         indiServerDir = QFileInfo(Options::indiServer()).dir().path();
 #endif
 
     QStringList paths;
     paths << "/usr/bin"
           << "/usr/local/bin" << indiServerDir;
 
     if (QStandardPaths::findExecutable("indiserver").isEmpty())
     {
         if (QStandardPaths::findExecutable("indiserver", paths).isEmpty())
         {
             KMessageBox::error(nullptr, i18n("Unable to find INDI server. Please make sure the package that provides "
                                              "the 'indiserver' binary is installed."));
             return;
         }
     }
 #endif
 
     QPointer<telescopeWizardProcess> twiz = new telescopeWizardProcess(this);
     twiz->exec();
     delete twiz;
 #endif
 }
 
 void KStars::slotINDIPanel()
 {
 #ifdef HAVE_INDI
 #ifndef Q_OS_WIN
 
     QString indiServerDir = Options::indiServer();
 
 #ifdef Q_OS_OSX
     if (Options::indiServerIsInternal())
         indiServerDir = QCoreApplication::applicationDirPath() + "/indi";
     else
         indiServerDir = QFileInfo(Options::indiServer()).dir().path();
 #endif
 
     QStringList paths;
     paths << "/usr/bin"
           << "/usr/local/bin" << indiServerDir;
 
     if (QStandardPaths::findExecutable("indiserver").isEmpty())
     {
         if (QStandardPaths::findExecutable("indiserver", paths).isEmpty())
         {
             KMessageBox::error(nullptr, i18n("Unable to find INDI server. Please make sure the package that provides "
                                              "the 'indiserver' binary is installed."));
             return;
         }
     }
 #endif
     GUIManager::Instance()->updateStatus(true);
 #endif
 }
 
 void KStars::slotINDIDriver()
 {
 #ifdef HAVE_INDI
 #ifndef Q_OS_WIN
 
     QString indiServerDir = Options::indiServer();
 
 #ifdef Q_OS_OSX
     if (Options::indiServerIsInternal())
         indiServerDir = QCoreApplication::applicationDirPath() + "/indi";
     else
         indiServerDir = QFileInfo(Options::indiServer()).dir().path();
 #endif
 
     QStringList paths;
     paths << "/usr/bin"
           << "/usr/local/bin" << indiServerDir;
 
     if (QStandardPaths::findExecutable("indiserver").isEmpty())
     {
         if (QStandardPaths::findExecutable("indiserver", paths).isEmpty())
         {
             KMessageBox::error(nullptr, i18n("Unable to find INDI server. Please make sure the package that provides "
                                              "the 'indiserver' binary is installed."));
             return;
         }
     }
 #endif
 
     DriverManager::Instance()->raise();
     DriverManager::Instance()->activateWindow();
     DriverManager::Instance()->showNormal();
 
 #endif
 }
 
 void KStars::slotEkos()
 {
 #ifdef HAVE_CFITSIO
 #ifdef HAVE_INDI
 
 #ifndef Q_OS_WIN
 
     QString indiServerDir = Options::indiServer();
 
 #ifdef Q_OS_OSX
     if (Options::indiServerIsInternal())
         indiServerDir = QCoreApplication::applicationDirPath() + "/indi";
     else
         indiServerDir = QFileInfo(Options::indiServer()).dir().path();
 #endif
 
     QStringList paths;
     paths << "/usr/bin"
           << "/usr/local/bin" << indiServerDir;
 
     if (QStandardPaths::findExecutable("indiserver").isEmpty())
     {
         if (QStandardPaths::findExecutable("indiserver", paths).isEmpty())
         {
             KMessageBox::error(nullptr, i18n("Unable to find INDI server. Please make sure the package that provides "
                                              "the 'indiserver' binary is installed."));
             return;
         }
     }
 #endif
 
     if (ekosManager()->isVisible() && ekosManager()->isActiveWindow())
     {
         ekosManager()->hide();
     }
     else
     {
         ekosManager()->raise();
         ekosManager()->activateWindow();
         ekosManager()->showNormal();
     }
 
 #endif
 #endif
 }
 
 void KStars::slotINDITelescopeTrack()
 {
 #ifdef HAVE_INDI
     if (m_KStarsData == nullptr || INDIListener::Instance() == nullptr)
         return;
 
     for (auto *gd : INDIListener::Instance()->getDevices())
     {
         ISD::Telescope* telescope = dynamic_cast<ISD::Telescope*>(gd);
 
         if (telescope != nullptr && telescope->isConnected())
         {
             KToggleAction *a = qobject_cast<KToggleAction*>(sender());
 
             if (a != nullptr)
             {
                 telescope->setTrackEnabled(a->isChecked());
                 return;
             }
         }
     }
 #endif
 }
 
 void KStars::slotINDITelescopeSlew(bool focused_object)
 {
 #ifdef HAVE_INDI
     if (m_KStarsData == nullptr || INDIListener::Instance() == nullptr)
         return;
 
     for (auto *gd : INDIListener::Instance()->getDevices())
     {
         ISD::Telescope* telescope = dynamic_cast<ISD::Telescope*>(gd);
 
         if (telescope != nullptr && telescope->isConnected())
         {
             if (focused_object)
             {
                 if (m_SkyMap->focusObject() != nullptr)
                     telescope->Slew(m_SkyMap->focusObject());
             } else
                 telescope->Slew(m_SkyMap->mousePoint());
 
             return;
         }
     }
 #endif
 }
 
 void KStars::slotINDITelescopeSlewMousePointer()
 {
 #ifdef HAVE_INDI
   slotINDITelescopeSlew(false);
 #endif
 }
 
 void KStars::slotINDITelescopeSync(bool focused_object)
 {
 #ifdef HAVE_INDI
     if (m_KStarsData == nullptr || INDIListener::Instance() == nullptr)
         return;
 
     for (auto *gd : INDIListener::Instance()->getDevices())
     {
         ISD::Telescope* telescope = dynamic_cast<ISD::Telescope*>(gd);
 
         if (telescope != nullptr && telescope->isConnected() && telescope->canSync())
         {
             if (focused_object)
             {
                 if (m_SkyMap->focusObject() != nullptr)
                     telescope->Sync(m_SkyMap->focusObject());
             } else
                 telescope->Sync(m_SkyMap->mousePoint());
 
             return;
         }
     }
 #endif
 }
 
 void KStars::slotINDITelescopeSyncMousePointer()
 {
 #ifdef HAVE_INDI
   slotINDITelescopeSync(false);
 #endif
 }
 
 void KStars::slotINDITelescopeAbort()
 {
 #ifdef HAVE_INDI
     if (m_KStarsData == nullptr || INDIListener::Instance() == nullptr)
         return;
 
     for (auto *gd : INDIListener::Instance()->getDevices())
     {
         ISD::Telescope* telescope = dynamic_cast<ISD::Telescope*>(gd);
 
         if (telescope != nullptr && telescope->isConnected())
         {
             telescope->Abort();
             return;
         }
     }
 #endif
 }
 
 void KStars::slotINDITelescopePark()
 {
 #ifdef HAVE_INDI
     if (m_KStarsData == nullptr || INDIListener::Instance() == nullptr)
         return;
 
     for (auto *gd : INDIListener::Instance()->getDevices())
     {
         ISD::Telescope* telescope = dynamic_cast<ISD::Telescope*>(gd);
 
         if (telescope != nullptr && telescope->isConnected() && telescope->canPark())
         {
             telescope->Park();
             return;
         }
     }
 #endif
 }
 
 void KStars::slotINDITelescopeUnpark()
 {
 #ifdef HAVE_INDI
     if (m_KStarsData == nullptr || INDIListener::Instance() == nullptr)
         return;
 
     for (auto *gd : INDIListener::Instance()->getDevices())
     {
         ISD::Telescope* telescope = dynamic_cast<ISD::Telescope*>(gd);
 
         if (telescope != nullptr && telescope->isConnected() && telescope->canPark())
         {
             telescope->UnPark();
             return;
         }
     }
 #endif
 }
 
 void KStars::slotGeoLocator()
 {
     QPointer<LocationDialog> locationdialog = new LocationDialog(this);
     if (locationdialog->exec() == QDialog::Accepted)
     {
         GeoLocation *newLocation = locationdialog->selectedCity();
         if (newLocation)
         {
             // set new location in options
             data()->setLocation(*newLocation);
 
             // adjust local time to keep UT the same.
             // create new LT without DST offset
             KStarsDateTime ltime = newLocation->UTtoLT(data()->ut());
 
             // reset timezonerule to compute next dst change
             newLocation->tzrule()->reset_with_ltime(ltime, newLocation->TZ0(), data()->isTimeRunningForward());
 
             // reset next dst change time
             data()->setNextDSTChange(newLocation->tzrule()->nextDSTChange());
 
             // reset local sideral time
             data()->syncLST();
 
             // Make sure Numbers, Moon, planets, and sky objects are updated immediately
             data()->setFullTimeUpdate();
 
             // If the sky is in Horizontal mode and not tracking, reset focus such that
             // Alt/Az remain constant.
             if (!Options::isTracking() && Options::useAltAz())
             {
                 map()->focus()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
             }
 
             // recalculate new times and objects
             data()->setSnapNextFocus();
             updateTime();
         }
     }
     delete locationdialog;
 }
 
 void KStars::slotViewOps()
 {
     //An instance of your dialog could be already created and could be cached,
     //in which case you want to display the cached dialog instead of creating
     //another one
     if (KConfigDialog::showDialog("settings"))
         return;
 
     //KConfigDialog didn't find an instance of this dialog, so lets create it :
     KConfigDialog *dialog = new KConfigDialog(this, "settings", Options::self());
     // For some reason the dialog does not resize to contents
     // so we set initial 'resonable' size here. Any better way to do this?
     dialog->resize(800,600);
 #ifdef Q_OS_OSX
     dialog->setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
 
     connect(dialog, SIGNAL(settingsChanged(QString)), this, SLOT(slotApplyConfigChanges()));
 
     opcatalog     = new OpsCatalog();
     opguides      = new OpsGuides();
     opsolsys      = new OpsSolarSystem();
     opssatellites = new OpsSatellites();
     opssupernovae = new OpsSupernovae();
     opcolors      = new OpsColors();
     opadvanced    = new OpsAdvanced();
 
     KPageWidgetItem *page;
 
     page = dialog->addPage(opcatalog, i18n("Catalogs"), "kstars_catalog");
     page->setIcon(QIcon::fromTheme("kstars_catalog", QIcon(":/icons/breeze/default/kstars_catalog.svg")));
 
     page = dialog->addPage(opsolsys, i18n("Solar System"), "kstars_solarsystem");
     page->setIcon(QIcon::fromTheme("kstars_solarsystem", QIcon(":/icons/breeze/default/kstars_solarsystem.svg")));
 
     page = dialog->addPage(opssatellites, i18n("Satellites"), "kstars_satellites");
     page->setIcon(QIcon::fromTheme("kstars_satellites", QIcon(":/icons/breeze/default/kstars_satellites.svg")));
 
     page = dialog->addPage(opssupernovae, i18n("Supernovae"), "kstars_supernovae");
     page->setIcon(QIcon::fromTheme("kstars_supernovae", QIcon(":/icons/breeze/default/kstars_supernovae.svg")));
 
     page = dialog->addPage(opguides, i18n("Guides"), "kstars_guides");
     page->setIcon(QIcon::fromTheme("kstars_guides", QIcon(":/icons/breeze/default/kstars_guides.svg")));
 
     page = dialog->addPage(opcolors, i18n("Colors"), "kstars_colors");
     page->setIcon(QIcon::fromTheme("kstars_colors", QIcon(":/icons/breeze/default/kstars_colors.svg")));
 
 #ifdef HAVE_CFITSIO
     opsfits = new OpsFITS();
     page    = dialog->addPage(opsfits, i18n("FITS"), "kstars_fitsviewer");
     page->setIcon(QIcon::fromTheme("kstars_fitsviewer", QIcon(":/icons/breeze/default/kstars_fitsviewer.svg")));
 #endif
 
 #ifdef HAVE_INDI
     opsindi = new OpsINDI();
     page    = dialog->addPage(opsindi, i18n("INDI"), "kstars_indi");
     page->setIcon(QIcon::fromTheme("kstars_indi", QIcon(":/icons/breeze/default/kstars_indi.svg")));
 #ifdef HAVE_CFITSIO
     opsekos                     = new OpsEkos();
     KPageWidgetItem *ekosOption = dialog->addPage(opsekos, i18n("Ekos"), "kstars_ekos");
     ekosOption->setIcon(QIcon::fromTheme("kstars_ekos", QIcon(":/icons/breeze/default/kstars_ekos.svg")));
     if (m_EkosManager)
         m_EkosManager->setOptionsWidget(ekosOption);
 #endif
 
 #endif
 
 #ifdef HAVE_XPLANET
     opsxplanet = new OpsXplanet(this);
     page       = dialog->addPage(opsxplanet, i18n("Xplanet"), "kstars_xplanet");
     page->setIcon(QIcon::fromTheme("kstars_xplanet", QIcon(":/icons/breeze/default/kstars_xplanet.svg")));
 #endif
 
     page = dialog->addPage(opadvanced, i18n("Advanced"), "kstars_advanced");
     page->setIcon(QIcon::fromTheme("kstars_advanced", QIcon(":/icons/breeze/default/kstars_advanced.svg")));
 
     dialog->show();
 }
 
 void KStars::slotApplyConfigChanges()
 {
     Options::self()->save();
 
     applyConfig();
 
     //data()->setFullTimeUpdate();
     //map()->forceUpdate();
 }
 
 void KStars::slotApplyWIConfigChanges()
 {
     Options::self()->save();
     applyConfig();
     m_WIView->updateObservingConditions();
     m_WIView->onReloadIconClicked();
 }
 
 void KStars::slotSetTime()
 {
     QPointer<TimeDialog> timedialog = new TimeDialog(data()->lt(), data()->geo(), this);
 
     if (timedialog->exec() == QDialog::Accepted)
     {
         data()->changeDateTime(data()->geo()->LTtoUT(timedialog->selectedDateTime()));
 
         if (Options::useAltAz())
         {
             if (map()->focusObject())
             {
                 map()->focusObject()->EquatorialToHorizontal(data()->lst(), data()->geo()->lat());
                 map()->setFocus(map()->focusObject());
             }
             else
                 map()->focus()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
         }
 
         map()->forceUpdateNow();
 
         //If focusObject has a Planet Trail, clear it and start anew.
         KSPlanetBase *planet = dynamic_cast<KSPlanetBase *>(map()->focusObject());
         if (planet && planet->hasTrail())
         {
             planet->clearTrail();
             planet->addToTrail();
         }
     }
     delete timedialog;
 }
 
 //Set Time to CPU clock
 void KStars::slotSetTimeToNow()
 {
     data()->changeDateTime(KStarsDateTime::currentDateTimeUtc());
 
     if (Options::useAltAz())
     {
         if (map()->focusObject())
         {
             map()->focusObject()->EquatorialToHorizontal(data()->lst(), data()->geo()->lat());
             map()->setFocus(map()->focusObject());
         }
         else
             map()->focus()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
     }
 
     map()->forceUpdateNow();
 
     //If focusObject has a Planet Trail, clear it and start anew.
     KSPlanetBase *planet = dynamic_cast<KSPlanetBase *>(map()->focusObject());
     if (planet && planet->hasTrail())
     {
         planet->clearTrail();
         planet->addToTrail();
     }
 }
 
 void KStars::slotFind()
 {
     clearCachedFindDialog();
     if (!m_FindDialog) // create new dialog if no dialog is existing
     {
         m_FindDialog = new FindDialog(this);
     }
 
     if (!m_FindDialog)
         qWarning() << i18n("KStars::slotFind() - Not enough memory for dialog");
     SkyObject *targetObject;
     if (m_FindDialog->exec() == QDialog::Accepted && (targetObject = m_FindDialog->targetObject()))
     {
         map()->setClickedObject(targetObject);
         map()->setClickedPoint(map()->clickedObject());
         map()->slotCenter();
     }
 
     // check if data has changed while dialog was open
     if (DialogIsObsolete)
         clearCachedFindDialog();
 }
 
 void KStars::slotOpenFITS()
 {
 #ifdef HAVE_CFITSIO
 
     static QUrl path = QUrl::fromLocalFile(QDir::homePath());
     QUrl fileURL =
         QFileDialog::getOpenFileUrl(KStars::Instance(), i18n("Open FITS"), path, "FITS (*.fits *.fit *.fts)");
 
     if (fileURL.isEmpty())
         return;
 
     // Remember last directory
     path.setUrl(fileURL.url(QUrl::RemoveFilename));
 
     FITSViewer *fv = new FITSViewer((Options::independentWindowFITS()) ? nullptr : this);
     // Error opening file
     if (fv->addFITS(&fileURL, FITS_NORMAL, FITS_NONE, QString(), false) == -2)
         delete (fv);
     else
         fv->show();
 #endif
 }
 
 void KStars::slotExportImage()
 {
     //TODO Check this
     //For remote files, this returns
     //QFileInfo::absolutePath: QFileInfo::absolutePath: Constructed with empty filename
     //As of 2014-07-19
     //QUrl fileURL = KFileDialog::getSaveUrl( QDir::homePath(), "image/png image/jpeg image/gif image/x-portable-pixmap image/bmp image/svg+xml" );
     QUrl fileURL = QFileDialog::getSaveFileUrl(KStars::Instance(), i18n("Export Image"), QUrl(),
                                                "Images (*.png *.jpeg *.gif *.bmp *.svg)");
 
     //User cancelled file selection dialog - abort image export
     if (fileURL.isEmpty())
     {
         return;
     }
 
     //Warn user if file exists!
     if (QFile::exists(fileURL.toLocalFile()))
     {
         int r = KMessageBox::warningContinueCancel(
             parentWidget(), i18n("A file named \"%1\" already exists. Overwrite it?", fileURL.fileName()),
             i18n("Overwrite File?"), KStandardGuiItem::overwrite());
         if (r == KMessageBox::Cancel)
             return;
     }
 
     // execute image export dialog
 
     // Note: We don't let ExportImageDialog create its own ImageExporter because we want legend settings etc to be remembered between UI use and DBus scripting interface use.
     //if ( !m_ImageExporter )
     //m_ImageExporter = new ImageExporter( this );
 
     if (!m_ExportImageDialog)
     {
         m_ExportImageDialog = new ExportImageDialog(fileURL.toLocalFile(), QSize(map()->width(), map()->height()),
                                                     KStarsData::Instance()->imageExporter());
     }
     else
     {
         m_ExportImageDialog->setOutputUrl(fileURL.toLocalFile());
         m_ExportImageDialog->setOutputSize(QSize(map()->width(), map()->height()));
     }
 
     m_ExportImageDialog->show();
 }
 
 void KStars::slotRunScript()
 {
     QUrl fileURL = QFileDialog::getOpenFileUrl(
         KStars::Instance(), QString(), QUrl(QDir::homePath()),
         "*.kstars|" + i18nc("Filter by file type: KStars Scripts.", "KStars Scripts (*.kstars)"));
     QFile f;
     //QString fname;
 
     if (fileURL.isValid())
     {
         if (fileURL.isLocalFile() == false)
         {
-            KMessageBox::sorry(0, i18n("Executing remote scripts is not supported."));
+            KMessageBox::sorry(nullptr, i18n("Executing remote scripts is not supported."));
             return;
         }
 
         /*
         if ( ! fileURL.isLocalFile() )
         {
             //Warn the user about executing remote code.
             QString message = i18n( "Warning:  You are about to execute a remote shell script on your machine. " );
             message += i18n( "If you absolutely trust the source of this script, press Continue to execute the script; " );
             message += i18n( "to save the file without executing it, press Save; " );
             message += i18n( "to cancel the download, press Cancel. " );
 
             int result = KMessageBox::warningYesNoCancel( 0, message, i18n( "Really Execute Remote Script?" ),
                          KStandardGuiItem::cont(), KStandardGuiItem::save() );
 
             if ( result == KMessageBox::Cancel ) return;
             if ( result == KMessageBox::No )
             { //save file
                 QUrl saveURL = QFileDialog::getSaveFileUrl(KStars::Instance(), QString(), QUrl(QDir::homePath()), "*.kstars|" + i18nc("Filter by file type: KStars Scripts.", "KStars Scripts (*.kstars)") );
                 QTemporaryFile tmpfile;
                 tmpfile.open();
 
                 while ( ! saveURL.isValid() )
                 {
                     message = i18n( "Save location is invalid. Try another location?" );
                     if ( KMessageBox::warningYesNo( 0, message, i18n( "Invalid Save Location" ), KGuiItem(i18n("Try Another")), KGuiItem(i18n("Do Not Try")) ) == KMessageBox::No ) return;
                     saveURL = QFileDialog::getSaveFileUrl(KStars::Instance(), QString(), QUrl(QDir::homePath()), "*.kstars|" + i18nc("Filter by file type: KStars Scripts.", "KStars Scripts (*.kstars)") );
                 }
 
                 if ( saveURL.isLocalFile() )
                 {
                     fname = saveURL.toLocalFile();
                 }
                 else
                 {
                     fname = tmpfile.fileName();
                 }
 
                 //if( KIO::NetAccess::download( fileURL, fname, this ) ) {
                 if (KIO::file_copy(fileURL, QUrl(fname))->exec() == true)
                 {
         #ifndef _WIN32
                     chmod( fname.toLatin1(), S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH ); //make it executable
         #endif
 
                     if ( tmpfile.fileName() == fname )
                     { //upload to remote location
                         //if ( ! KIO::NetAccess::upload( tmpfile.fileName(), fileURL, this ) )
                         QUrl sourceURL(tmpfile.fileName());
                         sourceURL.setScheme("file");
                         if (KIO::file_copy(sourceURL, fileURL)->exec() == false)
                         {
                             QString message = i18n( "Could not upload image to remote location: %1", fileURL.url() );
                             KMessageBox::sorry( 0, message, i18n( "Could not upload file" ) );
                         }
                     }
                 } else
                 {
                     KMessageBox::sorry( 0, i18n( "Could not download the file." ), i18n( "Download Error" ) );
                 }
 
                 return;
             }
         }
         */
 
         //Damn the torpedos and full speed ahead, we're executing the script!
         QTemporaryFile tmpfile;
         tmpfile.open();
 
         /*
         if ( ! fileURL.isLocalFile() )
         {
             fname = tmpfile.fileName();
             //if( KIO::NetAccess::download( fileURL, fname, this ) )
             if (KIO::file_copy(fileURL, QUrl(fname))->exec() == true)
             {
         #ifndef _WIN32
                 chmod( fname.toLatin1(), S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH );
         #endif
                 f.setFileName( fname );
             }
         } else {
             f.setFileName( fileURL.toLocalFile() );
         }*/
 
         f.setFileName(fileURL.toLocalFile());
 
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
 
         // Before we run the script, make sure that it's safe.  Each line must either begin with "#"
         // or begin with "dbus-send". INDI scripts are much more complicated, so this simple test is not
         // suitable. INDI Scripting will return in KDE 4.1
 
         QTextStream istream(&f);
         QString line;
         bool fileOK(true);
 
         while (!istream.atEnd())
         {
             line = istream.readLine();
             if (line.at(0) != '#' && line.left(9) != "dbus-send")
             {
                 fileOK = false;
                 break;
             }
         }
 
         if (!fileOK)
         {
             int answer;
             answer = KMessageBox::warningContinueCancel(
-                0,
+                nullptr,
                 i18n("The selected script contains unrecognized elements, "
                      "indicating that it was not created using the KStars script builder. "
                      "This script may not function properly, and it may even contain malicious code. "
                      "Would you like to execute it anyway?"),
                 i18n("Script Validation Failed"), KGuiItem(i18n("Run Nevertheless")), KStandardGuiItem::cancel(),
                 "daExecuteScript");
             if (answer == KMessageBox::Cancel)
                 return;
         }
 
         //Add statusbar message that script is running
         statusBar()->showMessage(i18n("Running script: %1", fileURL.fileName()));
 
         QProcess p;
         p.start(f.fileName());
         if (!p.waitForStarted())
             return;
 
         while (!p.waitForFinished(10))
         {
             qApp->processEvents(); //otherwise tempfile may get deleted before script completes.
             if (p.state() != QProcess::Running)
                 break;
         }
 
         statusBar()->showMessage(i18n("Script finished."), 0);
     }
 }
 
 void KStars::slotPrint()
 {
     bool switchColors(false);
 
     //Suggest Chart color scheme
     if (data()->colorScheme()->colorNamed("SkyColor") != QColor(255, 255, 255))
     {
         QString message = i18n("You can save printer ink by using the \"Star Chart\" "
                                "color scheme, which uses a white background. Would you like to "
                                "temporarily switch to the Star Chart color scheme for printing?");
 
         int answer;
         answer = KMessageBox::questionYesNoCancel(
-            0, message, i18n("Switch to Star Chart Colors?"), KGuiItem(i18n("Switch Color Scheme")),
+            nullptr, message, i18n("Switch to Star Chart Colors?"), KGuiItem(i18n("Switch Color Scheme")),
             KGuiItem(i18n("Do Not Switch")), KStandardGuiItem::cancel(), "askAgainPrintColors");
 
         if (answer == KMessageBox::Cancel)
             return;
         if (answer == KMessageBox::Yes)
             switchColors = true;
     }
 
     printImage(true, switchColors);
 }
 
 void KStars::slotPrintingWizard()
 {
     if (m_PrintingWizard)
     {
         delete m_PrintingWizard;
     }
 
     m_PrintingWizard = new PrintingWizard(this);
     m_PrintingWizard->show();
 }
 
 void KStars::slotToggleTimer()
 {
     if (data()->clock()->isActive())
     {
         data()->clock()->stop();
         updateTime();
     }
     else
     {
         if (fabs(data()->clock()->scale()) > Options::slewTimeScale())
             data()->clock()->setManualMode(true);
         data()->clock()->start();
         if (data()->clock()->isManualMode())
             map()->forceUpdate();
     }
 
     // Update clock state in options
     Options::setRunClock(data()->clock()->isActive());
 }
 
 void KStars::slotStepForward()
 {
     if (data()->clock()->isActive())
         data()->clock()->stop();
     data()->clock()->manualTick(true);
     map()->forceUpdate();
 }
 
 void KStars::slotStepBackward()
 {
     if (data()->clock()->isActive())
         data()->clock()->stop();
     data()->clock()->manualTick(true, true);
     map()->forceUpdate();
 }
 
 //Pointing
 void KStars::slotPointFocus()
 {
     // In the following cases, we set slewing=true in order to disengage tracking
     map()->stopTracking();
 
     if (sender() == actionCollection()->action("zenith"))
         map()->setDestinationAltAz(dms(90.0), map()->focus()->az());
     else if (sender() == actionCollection()->action("north"))
         map()->setDestinationAltAz(dms(15.0), dms(0.0001));
     else if (sender() == actionCollection()->action("east"))
         map()->setDestinationAltAz(dms(15.0), dms(90.0));
     else if (sender() == actionCollection()->action("south"))
         map()->setDestinationAltAz(dms(15.0), dms(180.0));
     else if (sender() == actionCollection()->action("west"))
         map()->setDestinationAltAz(dms(15.0), dms(270.0));
 }
 
 void KStars::slotTrack()
 {
     if (Options::isTracking())
     {
         Options::setIsTracking(false);
         actionCollection()->action("track_object")->setText(i18n("Engage &Tracking"));
         actionCollection()
             ->action("track_object")
             ->setIcon(QIcon::fromTheme("document-decrypt", QIcon(":/icons/breeze/default/document-encrypt.svg")));
 
         KSPlanetBase *planet = dynamic_cast<KSPlanetBase *>(map()->focusObject());
         if (planet && data()->temporaryTrail)
         {
             planet->clearTrail();
             data()->temporaryTrail = false;
         }
 
         map()->setClickedObject(nullptr);
         map()->setFocusObject(nullptr); //no longer tracking focusObject
         map()->setFocusPoint(nullptr);
     }
     else
     {
         map()->setClickedPoint(map()->focus());
         map()->setClickedObject(nullptr);
         map()->setFocusObject(nullptr); //no longer tracking focusObject
         map()->setFocusPoint(map()->clickedPoint());
         Options::setIsTracking(true);
         actionCollection()->action("track_object")->setText(i18n("Stop &Tracking"));
         actionCollection()
             ->action("track_object")
             ->setIcon(QIcon::fromTheme("document-encrypt", QIcon(":/icons/breeze/default/document-encrypt.svg")));
     }
 
     map()->forceUpdate();
 }
 
 void KStars::slotManualFocus()
 {
     QPointer<FocusDialog> focusDialog = new FocusDialog();
     if (Options::useAltAz())
         focusDialog->activateAzAltPage();
 
     if (focusDialog->exec() == QDialog::Accepted)
     {
         //If the requested position is very near the pole, we need to point first
         //to an intermediate location just below the pole in order to get the longitudinal
         //position (RA/Az) right.
         double realAlt(focusDialog->point()->alt().Degrees());
         double realDec(focusDialog->point()->dec().Degrees());
         if (Options::useAltAz() && realAlt > 89.0)
         {
             focusDialog->point()->setAlt(89.0);
             focusDialog->point()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
         }
         if (!Options::useAltAz() && realDec > 89.0)
         {
             focusDialog->point()->setDec(89.0);
             focusDialog->point()->EquatorialToHorizontal(data()->lst(), data()->geo()->lat());
         }
 
         map()->setClickedPoint(focusDialog->point());
 
         if (Options::isTracking())
             slotTrack();
 
         map()->slotCenter();
 
         //The slew takes some time to complete, and this often causes the final focus point to be slightly
         //offset from the user's requested coordinates (because EquatorialToHorizontal() is called
         //throughout the process, which depends on the sidereal time).  So we now "polish" the final
         //position by resetting the final focus to the focusDialog point.
         //
         //Also, if the requested position was within 1 degree of the coordinate pole, this will
         //automatically correct the final pointing from the intermediate offset position to the final position
         data()->setSnapNextFocus();
         if (Options::useAltAz())
         {
             map()->setDestinationAltAz(focusDialog->point()->alt(), focusDialog->point()->az());
         }
         else
         {
             map()->setDestination(focusDialog->point()->ra(), focusDialog->point()->dec());
         }
 
         //Now, if the requested point was near a pole, we need to reset the Alt/Dec of the focus.
         if (Options::useAltAz() && realAlt > 89.0)
             map()->focus()->setAlt(realAlt);
         if (!Options::useAltAz() && realDec > 89.0)
             map()->focus()->setDec(realAlt);
 
         //Don't track if we set Alt/Az coordinates.  This way, Alt/Az remain constant.
         if (focusDialog->usedAltAz())
             map()->stopTracking();
     }
     delete focusDialog;
 }
 
 void KStars::slotZoomChanged()
 {
     // Enable/disable actions
     actionCollection()->action("zoom_out")->setEnabled(Options::zoomFactor() > MINZOOM);
     actionCollection()->action("zoom_in")->setEnabled(Options::zoomFactor() < MAXZOOM);
     // Update status bar
     map()->setupProjector(); // this needs to be run redundantly, so that the FOV returned below is up-to-date.
     float fov                      = map()->projector()->fov();
     KLocalizedString fovi18nstring = ki18nc("approximate field of view", "Approximate FOV: %1 degrees");
     if (fov < 1.0)
     {
         fov           = fov * 60.0;
         fovi18nstring = ki18nc("approximate field of view", "Approximate FOV: %1 arcminutes");
     }
     if (fov < 1.0)
     {
         fov           = fov * 60.0;
         fovi18nstring = ki18nc("approximate field of view", "Approximate FOV: %1 arcseconds");
     }
     QString fovstring = fovi18nstring.subs(QString::number(fov, 'f', 1)).toString();
 
     statusBar()->showMessage(fovstring, 0);
 }
 
 void KStars::slotSetZoom()
 {
     bool ok;
     double currentAngle = map()->width() / (Options::zoomFactor() * dms::DegToRad);
     double minAngle     = map()->width() / (MAXZOOM * dms::DegToRad);
     double maxAngle     = map()->width() / (MINZOOM * dms::DegToRad);
 
     double angSize = QInputDialog::getDouble(
-        0,
+        nullptr,
         i18nc("The user should enter an angle for the field-of-view of the display",
               "Enter Desired Field-of-View Angle"),
         i18n("Enter a field-of-view angle in degrees: "), currentAngle, minAngle, maxAngle, 1, &ok);
 
     if (ok)
     {
         map()->setZoomFactor(map()->width() / (angSize * dms::DegToRad));
     }
 }
 
 void KStars::slotCoordSys()
 {
     if (Options::useAltAz())
     {
         Options::setUseAltAz(false);
         if (Options::useRefraction())
         {
             if (map()->focusObject()) //simply update focus to focusObject's position
                 map()->setFocus(map()->focusObject());
             else //need to recompute focus for unrefracted position
             {
                 map()->setFocusAltAz(SkyPoint::unrefract(map()->focus()->alt()), map()->focus()->az());
                 map()->focus()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
             }
         }
         actionCollection()->action("coordsys")->setText(i18n("Switch to horizonal view (Horizontal &Coordinates)"));
     }
     else
     {
         Options::setUseAltAz(true);
         if (Options::useRefraction())
         {
             map()->setFocusAltAz(map()->focus()->altRefracted(), map()->focus()->az());
         }
         actionCollection()->action("coordsys")->setText(i18n("Switch to star globe view (Equatorial &Coordinates)"));
     }
     map()->forceUpdate();
 }
 
 void KStars::slotMapProjection()
 {
     if (sender() == actionCollection()->action("project_lambert"))
         Options::setProjection(Projector::Lambert);
     if (sender() == actionCollection()->action("project_azequidistant"))
         Options::setProjection(Projector::AzimuthalEquidistant);
     if (sender() == actionCollection()->action("project_orthographic"))
         Options::setProjection(Projector::Orthographic);
     if (sender() == actionCollection()->action("project_equirectangular"))
         Options::setProjection(Projector::Equirectangular);
     if (sender() == actionCollection()->action("project_stereographic"))
         Options::setProjection(Projector::Stereographic);
     if (sender() == actionCollection()->action("project_gnomonic"))
         Options::setProjection(Projector::Gnomonic);
 
     //DEBUG
     qCDebug(KSTARS) << "Projection system: " << Options::projection();
 
     m_SkyMap->forceUpdate();
 }
 
 //Settings Menu:
 void KStars::slotColorScheme()
 {
     //use mid(3) to exclude the leading "cs_" prefix from the action name
     QString filename = QString(sender()->objectName()).mid(3) + ".colors";
     loadColorScheme(filename);
 }
 
 void KStars::slotTargetSymbol(bool flag)
 {
     qDebug() << QString("slotTargetSymbol: %1 %2").arg(sender()->objectName()).arg(flag);
 
     QStringList names = Options::fOVNames();
     if (flag)
     {
         // Add FOV to list
         names.append(sender()->objectName());
     }
     else
     {
         // Remove FOV from list
         int ix = names.indexOf(sender()->objectName());
         if (ix >= 0)
             names.removeAt(ix);
     }
     Options::setFOVNames(names);
 
     // Sync visibleFOVs with fovNames
     data()->syncFOV();
 
     map()->forceUpdate();
 }
 
 void KStars::slotHIPSSource()
 {
     QAction *selectedAction = qobject_cast<QAction*>(sender());
     Q_ASSERT(selectedAction != nullptr);
 
     HIPSManager::Instance()->setCurrentSource(selectedAction->text().remove("&"));
 
     map()->forceUpdate();
 }
 
 void KStars::slotFOVEdit()
 {
     QPointer<FOVDialog> fovdlg = new FOVDialog(this);
     if (fovdlg->exec() == QDialog::Accepted)
     {
         FOVManager::save();
         repopulateFOV();
     }
     delete fovdlg;
 }
 
 void KStars::slotObsList()
 {
     m_KStarsData->observingList()->show();
 }
 
 void KStars::slotEquipmentWriter()
 {
     QPointer<EquipmentWriter> equipmentdlg = new EquipmentWriter();
     equipmentdlg->loadEquipment();
     equipmentdlg->exec();
     delete equipmentdlg;
 }
 
 void KStars::slotObserverManager()
 {
     QPointer<ObserverAdd> m_observerAdd = new ObserverAdd();
     m_observerAdd->exec();
     delete m_observerAdd;
 }
 
 void KStars::slotHorizonManager()
 {
     if (!m_HorizonManager)
     {
         m_HorizonManager = new HorizonManager(this);
         connect(m_SkyMap, SIGNAL(positionClicked(SkyPoint*)), m_HorizonManager, SLOT(addSkyPoint(SkyPoint*)));
     }
 
     m_HorizonManager->show();
 }
 
 void KStars::slotEyepieceView(SkyPoint *sp, const QString &imagePath)
 {
     if (!m_EyepieceView)
         m_EyepieceView = new EyepieceField(this);
 
     // FIXME: Move FOV choice into the Eyepiece View tool itself.
     bool ok        = true;
-    const FOV *fov = 0;
+    const FOV *fov = nullptr;
     if (!data()->getAvailableFOVs().isEmpty())
     {
         // Ask the user to choose from a list of available FOVs.
         //int index;
         const FOV *f;
         QMap<QString, const FOV *> nameToFovMap;
         foreach (f, data()->getAvailableFOVs())
         {
             nameToFovMap.insert(f->name(), f);
         }
         nameToFovMap.insert(i18n("Attempt to determine from image"), 0);
         fov = nameToFovMap[QInputDialog::getItem(this, i18n("Eyepiece View: Choose a field-of-view"),
                                                  i18n("FOV to render eyepiece view for:"), nameToFovMap.uniqueKeys(), 0,
                                                  false, &ok)];
     }
     if (ok)
         m_EyepieceView->showEyepieceField(sp, fov, imagePath);
 }
 
 void KStars::slotExecute()
 {
     KStarsData::Instance()->executeSession()->init();
     KStarsData::Instance()->executeSession()->show();
 }
 
 void KStars::slotPolarisHourAngle()
 {
     QPointer<PolarisHourAngle> pHourAngle = new PolarisHourAngle(this);
     pHourAngle->exec();
 }
 
 //Help Menu
 void KStars::slotTipOfDay()
 {
     KTipDialog::showTip(this, "kstars/tips", true);
 }
 
 // Toggle to and from full screen mode
 void KStars::slotFullScreen()
 {
     if (topLevelWidget()->isFullScreen())
     {
         topLevelWidget()->setWindowState(topLevelWidget()->windowState() & ~Qt::WindowFullScreen); // reset
     }
     else
     {
         topLevelWidget()->setWindowState(topLevelWidget()->windowState() | Qt::WindowFullScreen); // set
     }
 }
 
 void KStars::slotClearAllTrails()
 {
     //Exclude object with temporary trail
     SkyObject *exOb(nullptr);
     if (map()->focusObject() && map()->focusObject()->isSolarSystem() && data()->temporaryTrail)
     {
         exOb = map()->focusObject();
     }
 
     TrailObject::clearTrailsExcept(exOb);
 
     map()->forceUpdate();
 }
 
 //toggle display of GUI Items on/off
 void KStars::slotShowGUIItem(bool show)
 {
     //Toolbars
     if (sender() == actionCollection()->action("show_statusBar"))
     {
         Options::setShowStatusBar(show);
         statusBar()->setVisible(show);
     }
 
     if (sender() == actionCollection()->action("show_sbAzAlt"))
     {
         Options::setShowAltAzField(show);
         if (!show)
             AltAzField.hide();
         else
             AltAzField.show();
     }
 
     if (sender() == actionCollection()->action("show_sbRADec"))
     {
         Options::setShowRADecField(show);
         if (!show)
             RADecField.hide();
         else
             RADecField.show();
     }
 
     if (sender() == actionCollection()->action("show_sbJ2000RADec"))
     {
         Options::setShowJ2000RADecField(show);
         if (!show)
             J2000RADecField.hide();
         else
             J2000RADecField.show();
     }
 }
 void KStars::addColorMenuItem(const QString &name, const QString &actionName)
 {
     KToggleAction *kta = actionCollection()->add<KToggleAction>(actionName);
     kta->setText(name);
     kta->setObjectName(actionName);
     kta->setActionGroup(cschemeGroup);
 
     colorActionMenu->addAction(kta);
 
     KConfigGroup cg = KSharedConfig::openConfig()->group("Colors");
     if (actionName.mid(3) == cg.readEntry("ColorSchemeFile", "moonless-night.colors").remove(".colors"))
     {
         kta->setChecked(true);
     }
 
     connect(kta, SIGNAL(toggled(bool)), this, SLOT(slotColorScheme()));
 }
 
 void KStars::removeColorMenuItem(const QString &actionName)
 {
     qCDebug(KSTARS) << "removing " << actionName;
     colorActionMenu->removeAction(actionCollection()->action(actionName));
 }
 
 void KStars::slotAboutToQuit()
 {
     // Delete skymap. This required to run destructors and save
     // current state in the option.
     delete m_SkyMap;
 
     //Store Window geometry in Options object
     Options::setWindowWidth(width());
     Options::setWindowHeight(height());
 
     //explicitly save the colorscheme data to the config file
     data()->colorScheme()->saveToConfig();
 
     //synch the config file with the Config object
     writeConfig();
 
 //Terminate Child Processes if on OS X
 #ifdef Q_OS_OSX
     QProcess *quit = new QProcess(this);
     quit->start("killall kdeinit5");
     quit->waitForFinished(1000);
     quit->start("killall klauncher");
     quit->waitForFinished(1000);
     quit->start("killall kioslave");
     quit->waitForFinished(1000);
     quit->start("killall kio_http_cache_cleaner");
     quit->waitForFinished(1000);
     delete quit;
 #endif
 }
 
 void KStars::slotShowPositionBar(SkyPoint *p)
 {
     if (Options::showAltAzField())
     {
         dms a = p->alt();
         if (Options::useAltAz())
             a = p->altRefracted();
         QString s = QString("%1, %2").arg(p->az().toDMSString(true), //true: force +/- symbol
                                           a.toDMSString(true));      //true: force +/- symbol
         //statusBar()->changeItem( s, 1 );
         AltAzField.setText(s);
     }
     if (Options::showRADecField())
     {
         KStarsDateTime lastUpdate;
         lastUpdate.setDJD(KStarsData::Instance()->updateNum()->getJD());
         QString sEpoch = QString::number(lastUpdate.epoch(), 'f', 1);
         QString s      = QString("%1, %2 (J%3)")
                         .arg(p->ra().toHMSString(), p->dec().toDMSString(true), sEpoch); //true: force +/- symbol
         //statusBar()->changeItem( s, 2 );
         RADecField.setText(s);
     }
 
     if (Options::showJ2000RADecField())
     {
         SkyPoint p0;
         p0        = p->deprecess(KStarsData::Instance()->updateNum()); // deprecess to update RA0/Dec0 from RA/Dec
         QString s = QString("%1, %2 (J2000)")
                         .arg(p0.ra().toHMSString(),
                              p0.dec().toDMSString(true)); //true: force +/- symbol
         //statusBar()->changeItem( s, 2 );
         J2000RADecField.setText(s);
     }
 }
 
 void KStars::slotUpdateComets()
 {
     data()->skyComposite()->solarSystemComposite()->cometsComponent()->updateDataFile();
 }
 
 void KStars::slotUpdateAsteroids()
 {
     data()->skyComposite()->solarSystemComposite()->asteroidsComponent()->updateDataFile();
 }
 
 void KStars::slotUpdateSupernovae()
 {
     data()->skyComposite()->supernovaeComponent()->slotTriggerDataFileUpdate();
 }
 
 void KStars::slotUpdateSatellites()
 {
     data()->skyComposite()->satellites()->updateTLEs();
 }
 
 void KStars::slotAddDeepSkyObject()
 {
     if (!m_addDSODialog)
     {
         Q_ASSERT(data() && data()->skyComposite() && data()->skyComposite()->manualAdditionsComponent());
         m_addDSODialog = new AddDeepSkyObject(this, data()->skyComposite()->manualAdditionsComponent());
     }
     m_addDSODialog->show();
 }
 
 void KStars::slotConfigureNotifications()
 {
 #ifdef HAVE_NOTIFYCONFIG
     KNotifyConfigWidget::configure(this);
 #endif
 }
diff --git a/kstars/kstarsdata.cpp b/kstars/kstarsdata.cpp
index 2bd2c4e82..af568a944 100644
--- a/kstars/kstarsdata.cpp
+++ b/kstars/kstarsdata.cpp
@@ -1,1460 +1,1460 @@
 /***************************************************************************
                           kstarsdata.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Jul 29 2001
     copyright            : (C) 2001 by Heiko Evermann
     email                : heiko@evermann.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "kstarsdata.h"
 
 #include "fov.h"
 #include "ksutils.h"
 #include "Options.h"
 #include "auxiliary/kspaths.h"
 #include "skycomponents/supernovaecomponent.h"
 #include "skycomponents/skymapcomposite.h"
 #ifndef KSTARS_LITE
 #include "imageexporter.h"
 #include "kstars.h"
 #include "observinglist.h"
 #include "skymap.h"
 #include "dialogs/detaildialog.h"
 #include "oal/execute.h"
 #endif
 
 #ifndef KSTARS_LITE
 #include <KMessageBox>
 #endif
 
 #include <QSqlQuery>
 #include <QtConcurrent>
 
 #include "kstars_debug.h"
 
 namespace
 {
 // Report fatal error during data loading to user
 // Calls QApplication::exit
 void fatalErrorMessage(QString fname)
 {
 #ifndef KSTARS_LITE
 
-    KMessageBox::sorry(0,
+    KMessageBox::sorry(nullptr,
                        i18n("The file  %1 could not be found. "
                             "KStars cannot run properly without this file. "
                             "KStars searches for this file in following locations:\n\n\t"
                             "%2\n\n"
                             "It appears that your setup is broken.",
                             fname, QStandardPaths::standardLocations(QStandardPaths::DataLocation).join("\n\t")),
                        i18n("Critical File Not Found: %1", fname)); // FIXME: Must list locations depending on file type
 #endif
     qDebug() << i18n("Critical File Not Found: %1", fname);
     qApp->exit(1);
 }
 
 // Report non-fatal error during data loading to user and ask
 // whether he wants to continue.
 // Calls QApplication::exit if he don't
 #if 0
 bool nonFatalErrorMessage(QString fname)
 {
 #ifdef KSTARS_LITE
     Q_UNUSED(fname)
 #else
     int res = KMessageBox::warningContinueCancel(0,
               i18n("The file %1 could not be found. "
                    "KStars can still run without this file. "
                    "KStars search for this file in following locations:\n\n\t"
                    "%2\n\n"
                    "It appears that you setup is broken. Press Continue to run KStars without this file ",
                    fname, QStandardPaths::standardLocations( QStandardPaths::DataLocation ).join("\n\t") ),
               i18n( "Non-Critical File Not Found: %1", fname ));  // FIXME: Must list locations depending on file type
     if( res != KMessageBox::Continue )
         qApp->exit(1);
     return res == KMessageBox::Continue;
 #endif
     return true;
 }
 #endif
 }
 
-KStarsData *KStarsData::pinstance = 0;
+KStarsData *KStarsData::pinstance = nullptr;
 
 KStarsData *KStarsData::Create()
 {
     // This method should never be called twice within a run, since a
     // lot of the code assumes that KStarsData, once created, is never
     // destroyed. They maintain local copies of KStarsData::Instance()
     // for efficiency (maybe this should change, but it is not
     // required to delete and reinstantiate KStarsData). Thus, when we
     // call this method, pinstance MUST be zero, i.e. this must be the
     // first (and last) time we are calling it. -- asimha
     Q_ASSERT(!pinstance);
 
     delete pinstance;
     pinstance = new KStarsData();
     return pinstance;
 }
 
 KStarsData::KStarsData()
     : m_Geo(dms(0), dms(0)), m_ksuserdb(), m_catalogdb(),
       temporaryTrail(false),
       //locale( new KLocale( "kstars" ) ),
       m_preUpdateID(0), m_updateID(0), m_preUpdateNumID(0), m_updateNumID(0), m_preUpdateNum(J2000), m_updateNum(J2000)
 {
 #ifndef KSTARS_LITE
     m_LogObject.reset(new OAL::Log);
 #endif
     // at startup times run forward
     setTimeDirection(0.0);
 }
 
 KStarsData::~KStarsData()
 {
     Q_ASSERT(pinstance);
 
 //delete locale;
     qDeleteAll(geoList);
     geoList.clear();
     qDeleteAll(ADVtreeList);
     ADVtreeList.clear();
 
     pinstance = nullptr;
 }
 
 bool KStarsData::initialize()
 {
     //Initialize CatalogDB//
     catalogdb()->Initialize();
 
     //Load Time Zone Rules//
     emit progressText(i18n("Reading time zone rules"));
     if (!readTimeZoneRulebook())
     {
         fatalErrorMessage("TZrules.dat");
         return false;
     }
 
     //Load Cities//
     emit progressText(i18n("Loading city data"));
     if (!readCityData())
     {
         fatalErrorMessage("citydb.sqlite");
         return false;
     }
 
     //Initialize User Database//
     emit progressText(i18n("Loading User Information"));
     m_ksuserdb.Initialize();
 
     //Initialize SkyMapComposite//
     emit progressText(i18n("Loading sky objects"));
     m_SkyComposite.reset(new SkyMapComposite());
     //Load Image URLs//
     //#ifndef Q_OS_ANDROID
     //On Android these 2 calls produce segfault. WARNING
     emit progressText(i18n("Loading Image URLs"));
 
     //if( !readURLData( "image_url.dat", 0 ) && !nonFatalErrorMessage( "image_url.dat" ) )
     //    return false;
     QtConcurrent::run(this, &KStarsData::readURLData, QString("image_url.dat"), 0, false);
 
     //Load Information URLs//
     emit progressText(i18n("Loading Information URLs"));
     //if( !readURLData( "info_url.dat", 1 ) && !nonFatalErrorMessage( "info_url.dat" ) )
     //    return false;
     QtConcurrent::run(this, &KStarsData::readURLData, QString("info_url.dat"), 1, false);
 
 //#endif
 //emit progressText( i18n("Loading Variable Stars" ) );
 
 #ifndef KSTARS_LITE
     //Initialize Observing List
     m_ObservingList = new ObservingList();
 #endif
 
     readUserLog();
 
 #ifndef KSTARS_LITE
     readADVTreeData();
 #endif
     return true;
 }
 
 void KStarsData::updateTime(GeoLocation *geo, const bool automaticDSTchange)
 {
     // sync LTime with the simulation clock
     LTime = geo->UTtoLT(ut());
     syncLST();
 
     //Only check DST if (1) TZrule is not the empty rule, and (2) if we have crossed
     //the DST change date/time.
     if (!geo->tzrule()->isEmptyRule())
     {
         if (TimeRunsForward)
         {
             // timedirection is forward
             // DST change happens if current date is bigger than next calculated dst change
             if (ut() > NextDSTChange)
                 resetToNewDST(geo, automaticDSTchange);
         }
         else
         {
             // timedirection is backward
             // DST change happens if current date is smaller than next calculated dst change
             if (ut() < NextDSTChange)
                 resetToNewDST(geo, automaticDSTchange);
         }
     }
 
     KSNumbers num(ut().djd());
 
     if (std::abs(ut().djd() - LastNumUpdate.djd()) > 1.0)
     {
         LastNumUpdate = KStarsDateTime(ut().djd());
         m_preUpdateNumID++;
         m_preUpdateNum = KSNumbers(num);
         skyComposite()->update(&num);
     }
 
     if (std::abs(ut().djd() - LastPlanetUpdate.djd()) > 0.01)
     {
         LastPlanetUpdate = KStarsDateTime(ut().djd());
         skyComposite()->updateSolarSystemBodies(&num);
     }
 
     // Moon moves ~30 arcmin/hr, so update its position every minute.
     if (std::abs(ut().djd() - LastMoonUpdate.djd()) > 0.00069444)
     {
         LastMoonUpdate = ut();
         skyComposite()->updateMoons(&num);
     }
 
     //Update Alt/Az coordinates.  Timescale varies with zoom level
     //If Clock is in Manual Mode, always update. (?)
     if (std::abs(ut().djd() - LastSkyUpdate.djd()) > 0.1 / Options::zoomFactor() || clock()->isManualMode())
     {
         LastSkyUpdate = ut();
         m_preUpdateID++;
         skyComposite()
             ->update(); //omit KSNumbers arg == just update Alt/Az coords // <-- Eh? -- asimha. Looks like this behavior / ideology has changed drastically.
 
         emit skyUpdate(clock()->isManualMode());
     }
 }
 
 void KStarsData::syncUpdateIDs()
 {
     m_updateID = m_preUpdateID;
     if (m_updateNumID == m_preUpdateNumID)
         return;
     m_updateNumID = m_preUpdateNumID;
     m_updateNum   = KSNumbers(m_preUpdateNum);
 }
 
 unsigned int KStarsData::incUpdateID()
 {
     m_preUpdateID++;
     m_preUpdateNumID++;
     syncUpdateIDs();
     return m_updateID;
 }
 
 void KStarsData::setFullTimeUpdate()
 {
     //Set the update markers to invalid dates to trigger updates in each category
     LastSkyUpdate    = KStarsDateTime(QDateTime());
     LastPlanetUpdate = KStarsDateTime(QDateTime());
     LastMoonUpdate   = KStarsDateTime(QDateTime());
     LastNumUpdate    = KStarsDateTime(QDateTime());
 }
 
 void KStarsData::syncLST()
 {
     LST = geo()->GSTtoLST(ut().gst());
 }
 
 void KStarsData::changeDateTime(const KStarsDateTime &newDate)
 {
     //Turn off animated slews for the next time step.
     setSnapNextFocus();
 
     clock()->setUTC(newDate);
 
     LTime = geo()->UTtoLT(ut());
     //set local sideral time
     syncLST();
 
     //Make sure Numbers, Moon, planets, and sky objects are updated immediately
     setFullTimeUpdate();
 
     // reset tzrules data with new local time and time direction (forward or backward)
     geo()->tzrule()->reset_with_ltime(LTime, geo()->TZ0(), isTimeRunningForward());
 
     // reset next dst change time
     setNextDSTChange(geo()->tzrule()->nextDSTChange());
 }
 
 void KStarsData::resetToNewDST(GeoLocation *geo, const bool automaticDSTchange)
 {
     // reset tzrules data with local time, timezone offset and time direction (forward or backward)
     // force a DST change with option true for 3. parameter
     geo->tzrule()->reset_with_ltime(LTime, geo->TZ0(), TimeRunsForward, automaticDSTchange);
     // reset next DST change time
     setNextDSTChange(geo->tzrule()->nextDSTChange());
     //reset LTime, because TZoffset has changed
     LTime = geo->UTtoLT(ut());
 }
 
 void KStarsData::setTimeDirection(float scale)
 {
     TimeRunsForward = scale >= 0;
 }
 
 GeoLocation *KStarsData::locationNamed(const QString &city, const QString &province, const QString &country)
 {
     foreach (GeoLocation *loc, geoList)
     {
         if (loc->translatedName() == city && (province.isEmpty() || loc->translatedProvince() == province) &&
             (country.isEmpty() || loc->translatedCountry() == country))
         {
             return loc;
         }
     }
-    return 0;
+    return nullptr;
 }
 
 void KStarsData::setLocationFromOptions()
 {
     setLocation(GeoLocation(dms(Options::longitude()), dms(Options::latitude()), Options::cityName(),
                             Options::provinceName(), Options::countryName(), Options::timeZone(),
                             &(Rulebook[Options::dST()]), false, 4, Options::elevation()));
 }
 
 void KStarsData::setLocation(const GeoLocation &l)
 {
     m_Geo = GeoLocation(l);
     if (m_Geo.lat()->Degrees() >= 90.0)
         m_Geo.setLat(dms(89.99));
     if (m_Geo.lat()->Degrees() <= -90.0)
         m_Geo.setLat(dms(-89.99));
 
     //store data in the Options objects
     Options::setCityName(m_Geo.name());
     Options::setProvinceName(m_Geo.province());
     Options::setCountryName(m_Geo.country());
     Options::setTimeZone(m_Geo.TZ0());
     Options::setElevation(m_Geo.height());
     Options::setLongitude(m_Geo.lng()->Degrees());
     Options::setLatitude(m_Geo.lat()->Degrees());
     // set the rule from rulebook
     foreach (const QString &key, Rulebook.keys())
     {
         if (!key.isEmpty() && m_Geo.tzrule()->equals(&Rulebook[key]))
             Options::setDST(key);
     }
 
     emit geoChanged();
 }
 
 SkyObject *KStarsData::objectNamed(const QString &name)
 {
     if ((name == "star") || (name == "nothing") || name.isEmpty())
-        return 0;
+        return nullptr;
     return skyComposite()->findByName(name);
 }
 
 bool KStarsData::readCityData()
 {
     QSqlDatabase citydb = QSqlDatabase::addDatabase("QSQLITE", "citydb");
     QString dbfile      = KSPaths::locate(QStandardPaths::GenericDataLocation, "citydb.sqlite");
     citydb.setDatabaseName(dbfile);
     if (citydb.open() == false)
     {
         qCCritical(KSTARS) << "Unable to open city database file " << dbfile << citydb.lastError().text();
         return false;
     }
 
     QSqlQuery get_query(citydb);
 
     //get_query.prepare("SELECT * FROM city");
     if (!get_query.exec("SELECT * FROM city"))
     {
         qCCritical(KSTARS) << get_query.lastError();
         return false;
     }
 
     bool citiesFound = false;
     // get_query.size() always returns -1 so we set citiesFound if at least one city is found
     while (get_query.next())
     {
         citiesFound          = true;
         QString name         = get_query.value(1).toString();
         QString province     = get_query.value(2).toString();
         QString country      = get_query.value(3).toString();
         dms lat              = dms(get_query.value(4).toString());
         dms lng              = dms(get_query.value(5).toString());
         double TZ            = get_query.value(6).toDouble();
         TimeZoneRule *TZrule = &(Rulebook[get_query.value(7).toString()]);
 
         // appends city names to list
         geoList.append(new GeoLocation(lng, lat, name, province, country, TZ, TZrule, true));
     }
     citydb.close();
 
     // Reading local database
     QSqlDatabase mycitydb = QSqlDatabase::addDatabase("QSQLITE", "mycitydb");
     dbfile = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + QDir::separator() + "mycitydb.sqlite";
 
     if (QFile::exists(dbfile))
     {
         mycitydb.setDatabaseName(dbfile);
         if (mycitydb.open())
         {
             QSqlQuery get_query(mycitydb);
 
             if (!get_query.exec("SELECT * FROM city"))
             {
                 qDebug() << get_query.lastError();
                 return false;
             }
             while (get_query.next())
             {
                 QString name         = get_query.value(1).toString();
                 QString province     = get_query.value(2).toString();
                 QString country      = get_query.value(3).toString();
                 dms lat              = dms(get_query.value(4).toString());
                 dms lng              = dms(get_query.value(5).toString());
                 double TZ            = get_query.value(6).toDouble();
                 TimeZoneRule *TZrule = &(Rulebook[get_query.value(7).toString()]);
 
                 // appends city names to list
                 geoList.append(new GeoLocation(lng, lat, name, province, country, TZ, TZrule, false));
             }
             mycitydb.close();
         }
     }
 
     return citiesFound;
 }
 
 bool KStarsData::readTimeZoneRulebook()
 {
     QFile file;
 
     if (KSUtils::openDataFile(file, "TZrules.dat"))
     {
         QTextStream stream(&file);
 
         while (!stream.atEnd())
         {
             QString line = stream.readLine().trimmed();
             if (line.length() && !line.startsWith('#')) //ignore commented and blank lines
             {
                 QStringList fields = line.split(' ', QString::SkipEmptyParts);
                 QString id         = fields[0];
                 QTime stime        = QTime(fields[3].leftRef(fields[3].indexOf(':')).toInt(),
                                     fields[3].midRef(fields[3].indexOf(':') + 1, fields[3].length()).toInt());
                 QTime rtime        = QTime(fields[6].leftRef(fields[6].indexOf(':')).toInt(),
                                     fields[6].midRef(fields[6].indexOf(':') + 1, fields[6].length()).toInt());
 
                 Rulebook[id] = TimeZoneRule(fields[1], fields[2], stime, fields[4], fields[5], rtime);
             }
         }
         return true;
     }
     else
     {
         return false;
     }
 }
 
 bool KStarsData::openUrlFile(const QString &urlfile, QFile &file)
 {
     //QFile file;
     QString localFile;
     bool fileFound = false;
     QFile localeFile;
 
     //if ( locale->language() != "en_US" )
     if (QLocale().language() != QLocale::English)
         //localFile = locale->language() + '/' + urlfile;
         localFile = QLocale().languageToString(QLocale().language()) + '/' + urlfile;
 
     if (!localFile.isEmpty() && KSUtils::openDataFile(file, localFile))
     {
         fileFound = true;
     }
     else
     {
         // Try to load locale file, if not successful, load regular urlfile and then copy it to locale.
         file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + urlfile);
         if (file.open(QIODevice::ReadOnly))
         {
             //local file found.  Now, if global file has newer timestamp, then merge the two files.
             //First load local file into QStringList
             bool newDataFound(false);
             QStringList urlData;
             QTextStream lStream(&file);
             while (!lStream.atEnd())
                 urlData.append(lStream.readLine());
 
             //Find global file(s) in findAllResources() list.
             QFileInfo fi_local(file.fileName());
 
             QStringList flist = KSPaths::locateAll(QStandardPaths::DataLocation, urlfile);
 
             for (int i = 0; i < flist.size(); i++)
             {
                 if (flist[i] != file.fileName())
                 {
                     QFileInfo fi_global(flist[i]);
 
                     //Is this global file newer than the local file?
                     if (fi_global.lastModified() > fi_local.lastModified())
                     {
                         //Global file has newer timestamp than local.  Add lines in global file that don't already exist in local file.
                         //be smart about this; in some cases the URL is updated but the image is probably the same if its
                         //label string is the same.  So only check strings up to last ":"
                         QFile globalFile(flist[i]);
                         if (globalFile.open(QIODevice::ReadOnly))
                         {
                             QTextStream gStream(&globalFile);
                             while (!gStream.atEnd())
                             {
                                 QString line = gStream.readLine();
 
                                 //If global-file line begins with "XXX:" then this line should be removed from the local file.
                                 if (line.startsWith(QLatin1String("XXX:")) && urlData.contains(line.mid(4)))
                                 {
                                     urlData.removeAt(urlData.indexOf(line.mid(4)));
                                 }
                                 else
                                 {
                                     //does local file contain the current global file line, up to second ':' ?
 
                                     bool linefound(false);
                                     for (int j = 0; j < urlData.size(); ++j)
                                     {
                                         if (urlData[j].contains(line.left(line.indexOf(':', line.indexOf(':') + 1))))
                                         {
                                             //replace line in urlData with its equivalent in the newer global file.
                                             urlData.replace(j, line);
                                             if (!newDataFound)
                                                 newDataFound = true;
                                             linefound = true;
                                             break;
                                         }
                                     }
                                     if (!linefound)
                                     {
                                         urlData.append(line);
                                         if (!newDataFound)
                                             newDataFound = true;
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
 
             file.close();
 
             //(possibly) write appended local file
             if (newDataFound)
             {
                 if (file.open(QIODevice::WriteOnly))
                 {
                     QTextStream outStream(&file);
                     for (int i = 0; i < urlData.size(); i++)
                     {
                         outStream << urlData[i] << endl;
                     }
                     file.close();
                 }
             }
 
             if (file.open(QIODevice::ReadOnly))
                 fileFound = true;
         }
         else
         {
             if (KSUtils::openDataFile(file, urlfile))
             {
                 if (QLocale().language() != QLocale::English)
                     qDebug() << "No localized URL file; using default English file.";
                 // we found urlfile, we need to copy it to locale
                 localeFile.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + urlfile);
                 if (localeFile.open(QIODevice::WriteOnly))
                 {
                     QTextStream readStream(&file);
                     QTextStream writeStream(&localeFile);
                     while (!readStream.atEnd())
                     {
                         QString line = readStream.readLine();
                         if (!line.startsWith(QLatin1String("XXX:"))) //do not write "deleted" lines
                             writeStream << line << endl;
                     }
 
                     localeFile.close();
                     file.reset();
                 }
                 else
                 {
                     qDebug() << "Failed to copy default URL file to locale folder, modifying default object links is "
                                 "not possible";
                 }
                 fileFound = true;
             }
         }
     }
     return fileFound;
 }
 
 // FIXME: This is a significant contributor to KStars start-up time
 bool KStarsData::readURLData(const QString &urlfile, int type, bool deepOnly)
 {
 #ifndef KSTARS_LITE
     if (KStars::Closing)
         return true;
 #endif
 
     QFile file;
     if (!openUrlFile(urlfile, file))
         return false;
 
     QTextStream stream(&file);
 
     while (!stream.atEnd())
     {
         QString line = stream.readLine();
 
         //ignore comment lines
         if (!line.startsWith('#'))
         {
 #ifndef KSTARS_LITE
             if (KStars::Closing)
             {
                 file.close();
                 return true;
             }
 #endif
 
             int idx      = line.indexOf(':');
             QString name = line.left(idx);
             if (name == "XXX")
                 continue;
             QString sub   = line.mid(idx + 1);
             idx           = sub.indexOf(':');
             QString title = sub.left(idx);
             QString url   = sub.mid(idx + 1);
             // Dirty hack to fix things up for planets
             SkyObject *o;
             if (name == "Mercury" || name == "Venus" || name == "Mars" || name == "Jupiter" || name == "Saturn" ||
                 name == "Uranus" || name == "Neptune" /* || name == "Pluto" */)
                 o = skyComposite()->findByName(i18n(name.toLocal8Bit().data()));
             else
                 o = skyComposite()->findByName(name);
 
             if (!o)
             {
                 qCWarning(KSTARS) << i18n("Object named %1 not found", name);
             }
             else
             {
                 if (!deepOnly || (o->type() > 2 && o->type() < 9))
                 {
                     if (type == 0) //image URL
                     {
                         o->ImageList().append(url);
                         o->ImageTitle().append(title);
                     }
                     else if (type == 1) //info URL
                     {
                         o->InfoList().append(url);
                         o->InfoTitle().append(title);
                     }
                 }
             }
         }
     }
     file.close();
     return true;
 }
 
 // FIXME: Improve the user log system
 
 // Note: It might be very nice to keep the log in plaintext files, for
 // portability, human-readability, and greppability. However, it takes
 // a lot of time to parse and look up, is very messy from the
 // reliability and programming point of view, needs to be parsed at
 // start, can become corrupt easily because of a missing bracket...
 
 // An SQLite database is a good compromise. A user can easily view it
 // using an SQLite browser. There is no need to read at start-up, one
 // can read the log when required. Easy to edit logs / update logs
 // etc. Will not become corrupt. Needn't be parsed.
 
 // However, IMHO, it is best to put these kinds of things in separate
 // databases, instead of unifying them as a table under the user
 // database. This ensures portability and a certain robustness that if
 // a user opens it, they cannot incorrectly edit a part of the DB they
 // did not intend to edit.
 
 // --asimha 2016 Aug 17
 
 // FIXME: This is a significant contributor to KStars startup time.
 bool KStarsData::readUserLog()
 {
     QFile file;
     QString buffer;
     QString sub, name, data;
 
     if (!KSUtils::openDataFile(file, "userlog.dat"))
         return false;
 
     QTextStream stream(&file);
 
     if (!stream.atEnd())
         buffer = stream.readAll();
 
     while (!buffer.isEmpty())
     {
         int startIndex, endIndex;
 
         startIndex = buffer.indexOf(QLatin1String("[KSLABEL:"));
         sub      = buffer.mid(startIndex); // FIXME: This is inefficient because we are making a copy of a huge string!
         endIndex = sub.indexOf(QLatin1String("[KSLogEnd]"));
 
         // Read name after KSLABEL identifer
         name = sub.mid(startIndex + 9, sub.indexOf(']') - (startIndex + 9));
         // Read data and skip new line
         data   = sub.mid(sub.indexOf(']') + 2, endIndex - (sub.indexOf(']') + 2));
         buffer = buffer.mid(endIndex + 11);
 
         //Find the sky object named 'name'.
         //Note that ObjectNameList::find() looks for the ascii representation
         //of star genetive names, so stars are identified that way in the user log.
         SkyObject *o = skyComposite()->findByName(name);
         if (!o)
         {
             qWarning() << name << " not found";
         }
         else
         {
             o->userLog() = data;
         }
 
     } // end while
     file.close();
     return true;
 }
 
 bool KStarsData::readADVTreeData()
 {
     QFile file;
     QString Interface;
     QString Name, Link, subName;
 
     if (!KSUtils::openDataFile(file, "advinterface.dat"))
         return false;
 
     QTextStream stream(&file);
     QString Line;
 
     while (!stream.atEnd())
     {
         int Type, interfaceIndex;
 
         Line = stream.readLine();
 
         if (Line.startsWith(QLatin1String("[KSLABEL]")))
         {
             Name = Line.mid(9);
             Type = 0;
         }
         else if (Line.startsWith(QLatin1String("[END]")))
             Type = 1;
         else if (Line.startsWith(QLatin1String("[KSINTERFACE]")))
         {
             Interface = Line.mid(13);
             continue;
         }
 
         else
         {
             int idx = Line.indexOf(':');
             Name    = Line.left(idx);
             Link    = Line.mid(idx + 1);
 
             // Link is empty, using Interface instead
             if (Link.isEmpty())
             {
                 Link           = Interface;
                 subName        = Name;
                 interfaceIndex = Link.indexOf(QLatin1String("KSINTERFACE"));
                 Link.remove(interfaceIndex, 11);
                 Link = Link.insert(interfaceIndex, subName.replace(' ', '+'));
             }
 
             Type = 2;
         }
 
         ADVTreeData *ADVData = new ADVTreeData;
 
         ADVData->Name = Name;
         ADVData->Link = Link;
         ADVData->Type = Type;
 
         ADVtreeList.append(ADVData);
     }
 
     return true;
 }
 
 //There's a lot of code duplication here, but it's not avoidable because
 //this function is only called from main.cpp when the user is using
 //"dump" mode to produce an image from the command line.  In this mode,
 //there is no KStars object, so none of the DBus functions can be called
 //directly.
 bool KStarsData::executeScript(const QString &scriptname, SkyMap *map)
 {
 #ifndef KSTARS_LITE
     int cmdCount(0);
 
     QFile f(scriptname);
     if (!f.open(QIODevice::ReadOnly))
     {
         qDebug() << "Could not open file " << f.fileName();
         return false;
     }
 
     QTextStream istream(&f);
     while (!istream.atEnd())
     {
         QString line = istream.readLine();
         line.remove("string:");
         line.remove("int:");
         line.remove("double:");
         line.remove("bool:");
 
         //find a dbus line and extract the function name and its arguments
         //The function name starts after the last occurrence of "org.kde.kstars."
         //or perhaps "org.kde.kstars.SimClock.".
         if (line.startsWith(QString("dbus-send")))
         {
             QString funcprefix = "org.kde.kstars.SimClock.";
             int i              = line.lastIndexOf(funcprefix);
             if (i >= 0)
             {
                 i += funcprefix.length();
             }
             else
             {
                 funcprefix = "org.kde.kstars.";
                 i          = line.lastIndexOf(funcprefix);
                 if (i >= 0)
                 {
                     i += funcprefix.length();
                 }
             }
             if (i < 0)
             {
                 qWarning() << "Could not parse line: " << line;
                 return false;
             }
 
             QStringList fn = line.mid(i).split(' ');
 
             //DEBUG
             //qDebug() << fn << endl;
 
             if (fn[0] == "lookTowards" && fn.size() >= 2)
             {
                 double az(-1.0);
                 QString arg = fn[1].toLower();
                 if (arg == "n" || arg == "north")
                     az = 0.0;
                 if (arg == "ne" || arg == "northeast")
                     az = 45.0;
                 if (arg == "e" || arg == "east")
                     az = 90.0;
                 if (arg == "se" || arg == "southeast")
                     az = 135.0;
                 if (arg == "s" || arg == "south")
                     az = 180.0;
                 if (arg == "sw" || arg == "southwest")
                     az = 225.0;
                 if (arg == "w" || arg == "west")
                     az = 270.0;
                 if (arg == "nw" || arg == "northwest")
                     az = 335.0;
                 if (az >= 0.0)
                 {
                     map->setFocusAltAz(dms(90.0), map->focus()->az());
                     map->focus()->HorizontalToEquatorial(&LST, geo()->lat());
                     map->setDestination(*map->focus());
                     cmdCount++;
                 }
 
                 if (arg == "z" || arg == "zenith")
                 {
                     map->setFocusAltAz(dms(90.0), map->focus()->az());
                     map->focus()->HorizontalToEquatorial(&LST, geo()->lat());
                     map->setDestination(*map->focus());
                     cmdCount++;
                 }
 
                 //try a named object.  The name is everything after fn[0],
                 //concatenated with spaces.
                 fn.removeAll(fn.first());
                 QString objname   = fn.join(" ");
                 SkyObject *target = objectNamed(objname);
                 if (target)
                 {
                     map->setFocus(target);
                     map->focus()->EquatorialToHorizontal(&LST, geo()->lat());
                     map->setDestination(*map->focus());
                     cmdCount++;
                 }
             }
             else if (fn[0] == "setRaDec" && fn.size() == 3)
             {
                 bool ok(false);
                 dms r(0.0), d(0.0);
 
                 ok = r.setFromString(fn[1], false); //assume angle in hours
                 if (ok)
                     ok = d.setFromString(fn[2], true); //assume angle in degrees
                 if (ok)
                 {
                     map->setFocus(r, d);
                     map->focus()->EquatorialToHorizontal(&LST, geo()->lat());
                     cmdCount++;
                 }
             }
             else if (fn[0] == "setAltAz" && fn.size() == 3)
             {
                 bool ok(false);
                 dms az(0.0), alt(0.0);
 
                 ok = alt.setFromString(fn[1]);
                 if (ok)
                     ok = az.setFromString(fn[2]);
                 if (ok)
                 {
                     map->setFocusAltAz(alt, az);
                     map->focus()->HorizontalToEquatorial(&LST, geo()->lat());
                     cmdCount++;
                 }
             }
             else if (fn[0] == "loadColorScheme")
             {
                 fn.removeAll(fn.first());
                 QString csName = fn.join(" ").remove('\"');
                 qCDebug(KSTARS) << "Loading Color scheme: " << csName;
 
                 QString filename = csName.toLower().trimmed();
                 bool ok(false);
 
                 //Parse default names which don't follow the regular file-naming scheme
                 if (csName == i18nc("use default color scheme", "Default Colors"))
                     filename = "classic.colors";
                 if (csName == i18nc("use 'star chart' color scheme", "Star Chart"))
                     filename = "chart.colors";
                 if (csName == i18nc("use 'night vision' color scheme", "Night Vision"))
                     filename = "night.colors";
 
                 //Try the filename if it ends with ".colors"
                 if (filename.endsWith(QLatin1String(".colors")))
                     ok = colorScheme()->load(filename);
 
                 //If that didn't work, try assuming that 'name' is the color scheme name
                 //convert it to a filename exactly as ColorScheme::save() does
                 if (!ok)
                 {
                     if (!filename.isEmpty())
                     {
                         for (int i = 0; i < filename.length(); ++i)
                             if (filename.at(i) == ' ')
                                 filename.replace(i, 1, "-");
 
                         filename = filename.append(".colors");
                         ok       = colorScheme()->load(filename);
                     }
 
                     if (!ok)
                         qDebug() << QString("Unable to load color scheme named %1. Also tried %2.")
                                         .arg(csName, filename);
                 }
             }
             else if (fn[0] == "zoom" && fn.size() == 2)
             {
                 bool ok(false);
                 double z = fn[1].toDouble(&ok);
                 if (ok)
                 {
                     if (z > MAXZOOM)
                         z = MAXZOOM;
                     if (z < MINZOOM)
                         z = MINZOOM;
                     Options::setZoomFactor(z);
                     cmdCount++;
                 }
             }
             else if (fn[0] == "zoomIn")
             {
                 if (Options::zoomFactor() < MAXZOOM)
                 {
                     Options::setZoomFactor(Options::zoomFactor() * DZOOM);
                     cmdCount++;
                 }
             }
             else if (fn[0] == "zoomOut")
             {
                 if (Options::zoomFactor() > MINZOOM)
                 {
                     Options::setZoomFactor(Options::zoomFactor() / DZOOM);
                     cmdCount++;
                 }
             }
             else if (fn[0] == "defaultZoom")
             {
                 Options::setZoomFactor(DEFAULTZOOM);
                 cmdCount++;
             }
             else if (fn[0] == "setLocalTime" && fn.size() == 7)
             {
                 bool ok(false);
                 // min is a macro - use mnt
                 int yr(0), mth(0), day(0), hr(0), mnt(0), sec(0);
                 yr = fn[1].toInt(&ok);
                 if (ok)
                     mth = fn[2].toInt(&ok);
                 if (ok)
                     day = fn[3].toInt(&ok);
                 if (ok)
                     hr = fn[4].toInt(&ok);
                 if (ok)
                     mnt = fn[5].toInt(&ok);
                 if (ok)
                     sec = fn[6].toInt(&ok);
                 if (ok)
                 {
                     changeDateTime(geo()->LTtoUT(KStarsDateTime(QDate(yr, mth, day), QTime(hr, mnt, sec))));
                     cmdCount++;
                 }
                 else
                 {
                     qWarning() << ki18n("Could not set time: %1 / %2 / %3 ; %4:%5:%6")
                                       .subs(day)
                                       .subs(mth)
                                       .subs(yr)
                                       .subs(hr)
                                       .subs(mnt)
                                       .subs(sec)
                                       .toString()
                                << endl;
                 }
             }
             else if (fn[0] == "changeViewOption" && fn.size() == 3)
             {
                 bool bOk(false), dOk(false);
 
                 //parse bool value
                 bool bVal(false);
                 if (fn[2].toLower() == "true")
                 {
                     bOk  = true;
                     bVal = true;
                 }
                 if (fn[2].toLower() == "false")
                 {
                     bOk  = true;
                     bVal = false;
                 }
                 if (fn[2] == "1")
                 {
                     bOk  = true;
                     bVal = true;
                 }
                 if (fn[2] == "0")
                 {
                     bOk  = true;
                     bVal = false;
                 }
 
                 //parse double value
                 double dVal = fn[2].toDouble(&dOk);
 
                 // FIXME: REGRESSION
                 //                if ( fn[1] == "FOVName"                ) { Options::setFOVName(       fn[2] ); cmdCount++; }
                 //                if ( fn[1] == "FOVSizeX"         && dOk ) { Options::setFOVSizeX( (float)dVal ); cmdCount++; }
                 //                if ( fn[1] == "FOVSizeY"         && dOk ) { Options::setFOVSizeY( (float)dVal ); cmdCount++; }
                 //                if ( fn[1] == "FOVShape"        && nOk ) { Options::setFOVShape(       nVal ); cmdCount++; }
                 //                if ( fn[1] == "FOVColor"               ) { Options::setFOVColor(      fn[2] ); cmdCount++; }
                 if (fn[1] == "ShowStars" && bOk)
                 {
                     Options::setShowStars(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowMessier" && bOk)
                 {
                     Options::setShowMessier(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowMessierImages" && bOk)
                 {
                     Options::setShowMessierImages(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowCLines" && bOk)
                 {
                     Options::setShowCLines(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowCNames" && bOk)
                 {
                     Options::setShowCNames(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowNGC" && bOk)
                 {
                     Options::setShowNGC(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowIC" && bOk)
                 {
                     Options::setShowIC(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowMilkyWay" && bOk)
                 {
                     Options::setShowMilkyWay(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowEquatorialGrid" && bOk)
                 {
                     Options::setShowEquatorialGrid(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowHorizontalGrid" && bOk)
                 {
                     Options::setShowHorizontalGrid(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowEquator" && bOk)
                 {
                     Options::setShowEquator(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowEcliptic" && bOk)
                 {
                     Options::setShowEcliptic(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowHorizon" && bOk)
                 {
                     Options::setShowHorizon(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowGround" && bOk)
                 {
                     Options::setShowGround(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowSun" && bOk)
                 {
                     Options::setShowSun(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowMoon" && bOk)
                 {
                     Options::setShowMoon(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowMercury" && bOk)
                 {
                     Options::setShowMercury(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowVenus" && bOk)
                 {
                     Options::setShowVenus(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowMars" && bOk)
                 {
                     Options::setShowMars(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowJupiter" && bOk)
                 {
                     Options::setShowJupiter(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowSaturn" && bOk)
                 {
                     Options::setShowSaturn(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowUranus" && bOk)
                 {
                     Options::setShowUranus(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowNeptune" && bOk)
                 {
                     Options::setShowNeptune(bVal);
                     cmdCount++;
                 }
                 //if ( fn[1] == "ShowPluto"       && bOk ) { Options::setShowPluto(    bVal ); cmdCount++; }
                 if (fn[1] == "ShowAsteroids" && bOk)
                 {
                     Options::setShowAsteroids(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowComets" && bOk)
                 {
                     Options::setShowComets(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowSolarSystem" && bOk)
                 {
                     Options::setShowSolarSystem(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowDeepSky" && bOk)
                 {
                     Options::setShowDeepSky(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowSupernovae" && bOk)
                 {
                     Options::setShowSupernovae(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowStarNames" && bOk)
                 {
                     Options::setShowStarNames(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowStarMagnitudes" && bOk)
                 {
                     Options::setShowStarMagnitudes(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowAsteroidNames" && bOk)
                 {
                     Options::setShowAsteroidNames(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowCometNames" && bOk)
                 {
                     Options::setShowCometNames(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowPlanetNames" && bOk)
                 {
                     Options::setShowPlanetNames(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ShowPlanetImages" && bOk)
                 {
                     Options::setShowPlanetImages(bVal);
                     cmdCount++;
                 }
 
                 if (fn[1] == "UseAltAz" && bOk)
                 {
                     Options::setUseAltAz(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "UseRefraction" && bOk)
                 {
                     Options::setUseRefraction(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "UseAutoLabel" && bOk)
                 {
                     Options::setUseAutoLabel(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "UseAutoTrail" && bOk)
                 {
                     Options::setUseAutoTrail(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "UseAnimatedSlewing" && bOk)
                 {
                     Options::setUseAnimatedSlewing(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "FadePlanetTrails" && bOk)
                 {
                     Options::setFadePlanetTrails(bVal);
                     cmdCount++;
                 }
                 if (fn[1] == "SlewTimeScale" && dOk)
                 {
                     Options::setSlewTimeScale(dVal);
                     cmdCount++;
                 }
                 if (fn[1] == "ZoomFactor" && dOk)
                 {
                     Options::setZoomFactor(dVal);
                     cmdCount++;
                 }
                 //                if ( fn[1] == "MagLimitDrawStar"     && dOk ) { Options::setMagLimitDrawStar( dVal ); cmdCount++; }
                 if (fn[1] == "StarDensity" && dOk)
                 {
                     Options::setStarDensity(dVal);
                     cmdCount++;
                 }
                 //                if ( fn[1] == "MagLimitDrawStarZoomOut" && dOk ) { Options::setMagLimitDrawStarZoomOut( dVal ); cmdCount++; }
                 if (fn[1] == "MagLimitDrawDeepSky" && dOk)
                 {
                     Options::setMagLimitDrawDeepSky(dVal);
                     cmdCount++;
                 }
                 if (fn[1] == "MagLimitDrawDeepSkyZoomOut" && dOk)
                 {
                     Options::setMagLimitDrawDeepSkyZoomOut(dVal);
                     cmdCount++;
                 }
                 if (fn[1] == "StarLabelDensity" && dOk)
                 {
                     Options::setStarLabelDensity(dVal);
                     cmdCount++;
                 }
                 if (fn[1] == "MagLimitHideStar" && dOk)
                 {
                     Options::setMagLimitHideStar(dVal);
                     cmdCount++;
                 }
                 if (fn[1] == "MagLimitAsteroid" && dOk)
                 {
                     Options::setMagLimitAsteroid(dVal);
                     cmdCount++;
                 }
                 if (fn[1] == "AsteroidLabelDensity" && dOk)
                 {
                     Options::setAsteroidLabelDensity(dVal);
                     cmdCount++;
                 }
                 if (fn[1] == "MaxRadCometName" && dOk)
                 {
                     Options::setMaxRadCometName(dVal);
                     cmdCount++;
                 }
 
                 //these three are a "radio group"
                 if (fn[1] == "UseLatinConstellationNames" && bOk)
                 {
                     Options::setUseLatinConstellNames(true);
                     Options::setUseLocalConstellNames(false);
                     Options::setUseAbbrevConstellNames(false);
                     cmdCount++;
                 }
                 if (fn[1] == "UseLocalConstellationNames" && bOk)
                 {
                     Options::setUseLatinConstellNames(false);
                     Options::setUseLocalConstellNames(true);
                     Options::setUseAbbrevConstellNames(false);
                     cmdCount++;
                 }
                 if (fn[1] == "UseAbbrevConstellationNames" && bOk)
                 {
                     Options::setUseLatinConstellNames(false);
                     Options::setUseLocalConstellNames(false);
                     Options::setUseAbbrevConstellNames(true);
                     cmdCount++;
                 }
             }
             else if (fn[0] == "setGeoLocation" && (fn.size() == 3 || fn.size() == 4))
             {
                 QString city(fn[1]), province, country(fn[2]);
                 province.clear();
                 if (fn.size() == 4)
                 {
                     province = fn[2];
                     country  = fn[3];
                 }
 
                 bool cityFound(false);
                 foreach (GeoLocation *loc, geoList)
                 {
                     if (loc->translatedName() == city &&
                         (province.isEmpty() || loc->translatedProvince() == province) &&
                         loc->translatedCountry() == country)
                     {
                         cityFound = true;
                         setLocation(*loc);
                         cmdCount++;
                         break;
                     }
                 }
 
                 if (!cityFound)
                     qWarning() << i18n("Could not set location named %1, %2, %3", city, province, country);
             }
         }
     } //end while
 
     if (cmdCount)
         return true;
 #else
     Q_UNUSED(map)
     Q_UNUSED(scriptname)
 #endif
     return false;
 }
 
 void KStarsData::syncFOV()
 {
     visibleFOVs.clear();
     // Add visible FOVs
     foreach (FOV *fov, availFOVs)
     {
         if (Options::fOVNames().contains(fov->name()))
             visibleFOVs.append(fov);
     }
     // Remove unavailable FOVs
     QSet<QString> names = QSet<QString>::fromList(Options::fOVNames());
     QSet<QString> all;
     foreach (FOV *fov, visibleFOVs)
     {
         all.insert(fov->name());
     }
     Options::setFOVNames(all.intersect(names).toList());
 }
 #ifndef KSTARS_LITE
 // FIXME: Why does KStarsData store the Execute instance??? -- asimha
 Execute *KStarsData::executeSession()
 {
     if (!m_Execute.get())
         m_Execute.reset(new Execute());
 
     return m_Execute.get();
 }
 
 // FIXME: Why does KStarsData store the ImageExporer instance??? KStarsData is supposed to work with no reference to KStars -- asimha
 ImageExporter *KStarsData::imageExporter()
 {
     if (!m_ImageExporter.get())
         m_ImageExporter.reset(new ImageExporter(KStars::Instance()));
 
     return m_ImageExporter.get();
 }
 #endif
diff --git a/kstars/kstarsdbus.cpp b/kstars/kstarsdbus.cpp
index b983dae10..faef16445 100644
--- a/kstars/kstarsdbus.cpp
+++ b/kstars/kstarsdbus.cpp
@@ -1,997 +1,997 @@
 /***************************************************************************
                           kstarsdbus.cpp  -  description
                              -------------------
     begin                : Son Apr 7 2002
     copyright            : (C) 2002 by Thomas Kabelmann
     email                : tk78@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 //KStars DBUS functions
 
 #include "kstars.h"
 
 #include "colorscheme.h"
 #include "eyepiecefield.h"
 #include "imageexporter.h"
 #include "ksdssdownloader.h"
 #include "kstarsdata.h"
 #include "observinglist.h"
 #include "Options.h"
 #include "skymap.h"
 #include "skycomponents/constellationboundarylines.h"
 #include "skycomponents/skymapcomposite.h"
 #include "skyobjects/deepskyobject.h"
 #include "skyobjects/ksplanetbase.h"
 #include "skyobjects/starobject.h"
 #include "tools/whatsinteresting/wiview.h"
 
 #ifdef HAVE_CFITSIO
 #include "fitsviewer/fitsviewer.h"
 #ifdef HAVE_INDI
 #include "ekos/ekosmanager.h"
 #endif
 #endif
 
 #include <KActionCollection>
 
 #include <QPrintDialog>
 #include <QPrinter>
 
 #include "kstars_debug.h"
 
 void KStars::setRaDec(double ra, double dec)
 {
     SkyPoint p(ra, dec);
     map()->setDestination(p);
 }
 
 void KStars::setAltAz(double alt, double az)
 {
     map()->setDestinationAltAz(dms(alt), dms(az));
 }
 
 void KStars::lookTowards(const QString &direction)
 {
     QString dir = direction.toLower();
     if (dir == i18n("zenith") || dir == "z")
     {
         actionCollection()->action("zenith")->trigger();
     }
     else if (dir == i18n("north") || dir == "n")
     {
         actionCollection()->action("north")->trigger();
     }
     else if (dir == i18n("east") || dir == "e")
     {
         actionCollection()->action("east")->trigger();
     }
     else if (dir == i18n("south") || dir == "s")
     {
         actionCollection()->action("south")->trigger();
     }
     else if (dir == i18n("west") || dir == "w")
     {
         actionCollection()->action("west")->trigger();
     }
     else if (dir == i18n("northeast") || dir == "ne")
     {
         map()->stopTracking();
         map()->clickedPoint()->setAlt(15.0);
         map()->clickedPoint()->setAz(45.0);
         map()->clickedPoint()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
         map()->slotCenter();
     }
     else if (dir == i18n("southeast") || dir == "se")
     {
         map()->stopTracking();
         map()->clickedPoint()->setAlt(15.0);
         map()->clickedPoint()->setAz(135.0);
         map()->clickedPoint()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
         map()->slotCenter();
     }
     else if (dir == i18n("southwest") || dir == "sw")
     {
         map()->stopTracking();
         map()->clickedPoint()->setAlt(15.0);
         map()->clickedPoint()->setAz(225.0);
         map()->clickedPoint()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
         map()->slotCenter();
     }
     else if (dir == i18n("northwest") || dir == "nw")
     {
         map()->stopTracking();
         map()->clickedPoint()->setAlt(15.0);
         map()->clickedPoint()->setAz(315.0);
         map()->clickedPoint()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
         map()->slotCenter();
     }
     else
     {
         SkyObject *target = data()->objectNamed(direction);
         if (target != nullptr)
         {
             map()->setClickedObject(target);
             map()->setClickedPoint(target);
             map()->slotCenter();
         }
     }
 }
 
 void KStars::addLabel(const QString &name)
 {
     SkyObject *target = data()->objectNamed(name);
     if (target != nullptr)
     {
         data()->skyComposite()->addNameLabel(target);
         map()->forceUpdate();
     }
 }
 
 void KStars::removeLabel(const QString &name)
 {
     SkyObject *target = data()->objectNamed(name);
     if (target != nullptr)
     {
         data()->skyComposite()->removeNameLabel(target);
         map()->forceUpdate();
     }
 }
 
 void KStars::addTrail(const QString &name)
 {
     TrailObject *target = dynamic_cast<TrailObject *>(data()->objectNamed(name));
     if (target)
     {
         target->addToTrail();
         map()->forceUpdate();
     }
 }
 
 void KStars::removeTrail(const QString &name)
 {
     TrailObject *target = dynamic_cast<TrailObject *>(data()->objectNamed(name));
     if (target)
     {
         target->clearTrail();
         map()->forceUpdate();
     }
 }
 
 void KStars::zoom(double z)
 {
     map()->setZoomFactor(z);
 }
 
 void KStars::zoomIn()
 {
     map()->slotZoomIn();
 }
 
 void KStars::zoomOut()
 {
     map()->slotZoomOut();
 }
 
 void KStars::defaultZoom()
 {
     map()->slotZoomDefault();
 }
 
 void KStars::setLocalTime(int yr, int mth, int day, int hr, int min, int sec)
 {
     data()->changeDateTime(data()->geo()->LTtoUT(KStarsDateTime(QDate(yr, mth, day), QTime(hr, min, sec))));
 }
 
 void KStars::setTimeToNow()
 {
     slotSetTimeToNow();
 }
 
 void KStars::waitFor(double sec)
 {
     QTime tm;
     tm.start();
     while (tm.elapsed() < int(1000. * sec))
     {
         qApp->processEvents();
     }
 }
 
 void KStars::waitForKey(const QString &k)
 {
     data()->resumeKey = QKeySequence::fromString(k);
     if (!data()->resumeKey.isEmpty())
     {
         //When the resumeKey is pressed, resumeKey is set to empty
         while (!data()->resumeKey.isEmpty())
             qApp->processEvents();
     }
     else
     {
         qDebug() << "Error [D-Bus waitForKey()]: Invalid key requested.";
     }
 }
 
 void KStars::setTracking(bool track)
 {
     if (track != Options::isTracking())
         slotTrack();
 }
 
 void KStars::popupMessage(int /*x*/, int /*y*/, const QString & /*message*/)
 {
     //Show a small popup window at (x,y) with a text message
 }
 
 void KStars::drawLine(int /*x1*/, int /*y1*/, int /*x2*/, int /*y2*/, int /*speed*/)
 {
     //Draw a line on the skymap display
 }
 
 bool KStars::setGeoLocation(const QString &city, const QString &province, const QString &country)
 {
     //Set the geographic location
     bool cityFound(false);
 
     foreach (GeoLocation *loc, data()->geoList)
     {
         if (loc->translatedName() == city && (province.isEmpty() || loc->translatedProvince() == province) &&
             loc->translatedCountry() == country)
         {
             cityFound = true;
 
             data()->setLocation(*loc);
 
             //configure time zone rule
             KStarsDateTime ltime = loc->UTtoLT(data()->ut());
             loc->tzrule()->reset_with_ltime(ltime, loc->TZ0(), data()->isTimeRunningForward());
             data()->setNextDSTChange(loc->tzrule()->nextDSTChange());
 
             //reset LST
             data()->syncLST();
 
             //make sure planets, etc. are updated immediately
             data()->setFullTimeUpdate();
 
             // If the sky is in Horizontal mode and not tracking, reset focus such that
             // Alt/Az remain constant.
             if (!Options::isTracking() && Options::useAltAz())
             {
                 map()->focus()->HorizontalToEquatorial(data()->lst(), data()->geo()->lat());
             }
 
             // recalculate new times and objects
             data()->setSnapNextFocus();
             updateTime();
 
             //no need to keep looking, we're done.
             break;
         }
     }
 
     if (!cityFound)
     {
         if (province.isEmpty())
             qDebug()
                 << QString("Error [D-Bus setGeoLocation]: city %1, %2 not found in database.").arg(city, country);
         else
             qDebug() << QString("Error [D-Bus setGeoLocation]: city %1, %2, %3 not found in database.")
                             .arg(city, province, country);
     }
 
     return cityFound;
 }
 
 void KStars::readConfig()
 {
     //Load config file values into Options object
     Options::self()->load();
 
     applyConfig();
 
     //Reset date, if one was stored
     if (data()->StoredDate.isValid())
     {
         data()->changeDateTime(data()->geo()->LTtoUT(data()->StoredDate));
         data()->StoredDate = KStarsDateTime(QDateTime()); //invalidate StoredDate
     }
 
     map()->forceUpdate();
 }
 
 void KStars::writeConfig()
 {
     Options::self()->save();
 
     //Store current simulation time
     data()->StoredDate = data()->lt();
 }
 
 QString KStars::getOption(const QString &name)
 {
     //Some config items are not stored in the Options object while
     //the program is running; catch these here and returntheir current value.
     if (name == "FocusRA")
     {
         return QString::number(map()->focus()->ra().Hours(), 'f', 6);
     }
     if (name == "FocusDec")
     {
         return QString::number(map()->focus()->dec().Degrees(), 'f', 6);
     }
 
     KConfigSkeletonItem *it = Options::self()->findItem(name);
     if (it)
         return it->property().toString();
     else
         return QString();
 }
 
 void KStars::changeViewOption(const QString &op, const QString &val)
 {
     bool bOk(false), dOk(false);
 
     //parse bool value
     bool bVal(false);
     if (val.toLower() == "true")
     {
         bOk  = true;
         bVal = true;
     }
     if (val.toLower() == "false")
     {
         bOk  = true;
         bVal = false;
     }
     if (val == "1")
     {
         bOk  = true;
         bVal = true;
     }
     if (val == "0")
     {
         bOk  = true;
         bVal = false;
     }
 
     //parse double value
     double dVal = val.toDouble(&dOk);
 
     //[GUI]
     if (op == "ShowInfoBoxes" && bOk)
         Options::setShowInfoBoxes(bVal);
     if (op == "ShowTimeBox" && bOk)
         Options::setShowTimeBox(bVal);
     if (op == "ShowGeoBox" && bOk)
         Options::setShowGeoBox(bVal);
     if (op == "ShowFocusBox" && bOk)
         Options::setShowFocusBox(bVal);
     if (op == "ShadeTimeBox" && bOk)
         Options::setShadeTimeBox(bVal);
     if (op == "ShadeGeoBox" && bOk)
         Options::setShadeGeoBox(bVal);
     if (op == "ShadeFocusBox" && bOk)
         Options::setShadeFocusBox(bVal);
 
     //[View]
     // FIXME: REGRESSION
     //     if ( op == "FOVName"                ) Options::setFOVName(         val );
     //     if ( op == "FOVSizeX"         && dOk ) Options::setFOVSizeX( (float)dVal );
     //     if ( op == "FOVSizeY"         && dOk ) Options::setFOVSizeY( (float)dVal );
     //     if ( op == "FOVShape"        && nOk ) Options::setFOVShape(       nVal );
     //     if ( op == "FOVColor"               ) Options::setFOVColor(        val );
     if (op == "ShowStars" && bOk)
         Options::setShowStars(bVal);
     if (op == "ShowMessier" && bOk)
         Options::setShowMessier(bVal);
     if (op == "ShowMessierImages" && bOk)
         Options::setShowMessierImages(bVal);
     if (op == "ShowNGC" && bOk)
         Options::setShowNGC(bVal);
     if (op == "ShowIC" && bOk)
         Options::setShowIC(bVal);
     if (op == "ShowCLines" && bOk)
         Options::setShowCLines(bVal);
     if (op == "ShowCBounds" && bOk)
         Options::setShowCBounds(bVal);
     if (op == "ShowCNames" && bOk)
         Options::setShowCNames(bVal);
     if (op == "ShowMilkyWay" && bOk)
         Options::setShowMilkyWay(bVal);
     if (op == "AutoSelectGrid" && bOk)
         Options::setAutoSelectGrid(bVal);
     if (op == "ShowEquatorialGrid" && bOk)
         Options::setShowEquatorialGrid(bVal);
     if (op == "ShowHorizontalGrid" && bOk)
         Options::setShowHorizontalGrid(bVal);
     if (op == "ShowEquator" && bOk)
         Options::setShowEquator(bVal);
     if (op == "ShowEcliptic" && bOk)
         Options::setShowEcliptic(bVal);
     if (op == "ShowHorizon" && bOk)
         Options::setShowHorizon(bVal);
     if (op == "ShowGround" && bOk)
         Options::setShowGround(bVal);
     if (op == "ShowSun" && bOk)
         Options::setShowSun(bVal);
     if (op == "ShowMoon" && bOk)
         Options::setShowMoon(bVal);
     if (op == "ShowMercury" && bOk)
         Options::setShowMercury(bVal);
     if (op == "ShowVenus" && bOk)
         Options::setShowVenus(bVal);
     if (op == "ShowMars" && bOk)
         Options::setShowMars(bVal);
     if (op == "ShowJupiter" && bOk)
         Options::setShowJupiter(bVal);
     if (op == "ShowSaturn" && bOk)
         Options::setShowSaturn(bVal);
     if (op == "ShowUranus" && bOk)
         Options::setShowUranus(bVal);
     if (op == "ShowNeptune" && bOk)
         Options::setShowNeptune(bVal);
     //if ( op == "ShowPluto"       && bOk ) Options::setShowPluto(    bVal );
     if (op == "ShowAsteroids" && bOk)
         Options::setShowAsteroids(bVal);
     if (op == "ShowComets" && bOk)
         Options::setShowComets(bVal);
     if (op == "ShowSolarSystem" && bOk)
         Options::setShowSolarSystem(bVal);
     if (op == "ShowDeepSky" && bOk)
         Options::setShowDeepSky(bVal);
     if (op == "ShowSupernovae" && bOk)
         Options::setShowSupernovae(bVal);
     if (op == "ShowStarNames" && bOk)
         Options::setShowStarNames(bVal);
     if (op == "ShowStarMagnitudes" && bOk)
         Options::setShowStarMagnitudes(bVal);
     if (op == "ShowAsteroidNames" && bOk)
         Options::setShowAsteroidNames(bVal);
     if (op == "ShowCometNames" && bOk)
         Options::setShowCometNames(bVal);
     if (op == "ShowPlanetNames" && bOk)
         Options::setShowPlanetNames(bVal);
     if (op == "ShowPlanetImages" && bOk)
         Options::setShowPlanetImages(bVal);
     if (op == "HideOnSlew" && bOk)
         Options::setHideOnSlew(bVal);
     if (op == "HideStars" && bOk)
         Options::setHideStars(bVal);
     if (op == "HidePlanets" && bOk)
         Options::setHidePlanets(bVal);
     if (op == "HideMessier" && bOk)
         Options::setHideMessier(bVal);
     if (op == "HideNGC" && bOk)
         Options::setHideNGC(bVal);
     if (op == "HideIC" && bOk)
         Options::setHideIC(bVal);
     if (op == "HideMilkyWay" && bOk)
         Options::setHideMilkyWay(bVal);
     if (op == "HideCNames" && bOk)
         Options::setHideCNames(bVal);
     if (op == "HideCLines" && bOk)
         Options::setHideCLines(bVal);
     if (op == "HideCBounds" && bOk)
         Options::setHideCBounds(bVal);
     if (op == "HideGrids" && bOk)
         Options::setHideGrids(bVal);
     if (op == "HideLabels" && bOk)
         Options::setHideLabels(bVal);
 
     if (op == "UseAltAz" && bOk)
         Options::setUseAltAz(bVal);
     if (op == "UseRefraction" && bOk)
         Options::setUseRefraction(bVal);
     if (op == "UseAutoLabel" && bOk)
         Options::setUseAutoLabel(bVal);
     if (op == "UseHoverLabel" && bOk)
         Options::setUseHoverLabel(bVal);
     if (op == "UseAutoTrail" && bOk)
         Options::setUseAutoTrail(bVal);
     if (op == "UseAnimatedSlewing" && bOk)
         Options::setUseAnimatedSlewing(bVal);
     if (op == "FadePlanetTrails" && bOk)
         Options::setFadePlanetTrails(bVal);
     if (op == "SlewTimeScale" && dOk)
         Options::setSlewTimeScale(dVal);
     if (op == "ZoomFactor" && dOk)
         Options::setZoomFactor(dVal);
     //    if ( op == "MagLimitDrawStar"     && dOk )    Options::setMagLimitDrawStar(    dVal );
     if (op == "MagLimitDrawDeepSky" && dOk)
         Options::setMagLimitDrawDeepSky(dVal);
     if (op == "StarDensity" && dOk)
         Options::setStarDensity(dVal);
     //    if ( op == "MagLimitDrawStarZoomOut" && dOk ) Options::setMagLimitDrawStarZoomOut(        dVal );
     if (op == "MagLimitDrawDeepSkyZoomOut" && dOk)
         Options::setMagLimitDrawDeepSkyZoomOut(dVal);
     if (op == "StarLabelDensity" && dOk)
         Options::setStarLabelDensity(dVal);
     if (op == "MagLimitHideStar" && dOk)
         Options::setMagLimitHideStar(dVal);
     if (op == "MagLimitAsteroid" && dOk)
         Options::setMagLimitAsteroid(dVal);
     if (op == "AsteroidLabelDensity" && dOk)
         Options::setAsteroidLabelDensity(dVal);
     if (op == "MaxRadCometName" && dOk)
         Options::setMaxRadCometName(dVal);
 
     //these three are a "radio group"
     if (op == "UseLatinConstellationNames" && bOk)
     {
         Options::setUseLatinConstellNames(true);
         Options::setUseLocalConstellNames(false);
         Options::setUseAbbrevConstellNames(false);
     }
     if (op == "UseLocalConstellationNames" && bOk)
     {
         Options::setUseLatinConstellNames(false);
         Options::setUseLocalConstellNames(true);
         Options::setUseAbbrevConstellNames(false);
     }
     if (op == "UseAbbrevConstellationNames" && bOk)
     {
         Options::setUseLatinConstellNames(false);
         Options::setUseLocalConstellNames(false);
         Options::setUseAbbrevConstellNames(true);
     }
 
     map()->forceUpdate();
 }
 
 void KStars::setColor(const QString &name, const QString &value)
 {
     ColorScheme *cs = data()->colorScheme();
     if (cs->hasColorNamed(name))
     {
         cs->setColor(name, value);
         map()->forceUpdate();
     }
 }
 
 void KStars::loadColorScheme(const QString &name)
 {
     bool ok = data()->colorScheme()->load(name);
     //QString filename = data()->colorScheme()->fileName();
 
     if (ok)
     {
         //set the application colors for the Night Vision scheme
         if (Options::darkAppColors())
         {
             //OriginalPalette = QApplication::palette();
             QApplication::setPalette(DarkPalette);
             if (KStars::Instance()->wiView())
                 KStars::Instance()->wiView()->setNightVisionOn(true);
 //Note:  This uses style sheets to set the dark colors, this is cross platform.  Palettes have a different behavior on OS X and Windows as opposed to Linux.
 //It might be a good idea to use stylesheets in the future instead of palettes but this will work for now for OS X.
 //This is also in KStars.cpp.  If you change it, change it in BOTH places.
 #ifdef Q_OS_OSX
             qDebug() << "setting dark stylesheet";
             qApp->setStyleSheet(
                 "QWidget { background-color: black; color:red; "
                 "selection-background-color:rgb(30,30,30);selection-color:white}"
                 "QToolBar { border:none }"
                 "QTabBar::tab:selected { background-color:rgb(50,50,50) }"
                 "QTabBar::tab:!selected { background-color:rgb(30,30,30) }"
                 "QPushButton { background-color:rgb(50,50,50);border-width:1px; border-style:solid;border-color:black}"
                 "QPushButton::disabled { background-color:rgb(10,10,10);border-width:1px; "
                 "border-style:solid;border-color:black }"
                 "QToolButton:Checked { background-color:rgb(30,30,30); border:none }"
                 "QComboBox { background-color:rgb(30,30,30); }"
                 "QComboBox::disabled { background-color:rgb(10,10,10) }"
                 "QScrollBar::handle { background: rgb(30,30,30) }"
                 "QSpinBox { border-width: 1px; border-style:solid; border-color:rgb(30,30,30) }"
                 "QDoubleSpinBox { border-width:1px; border-style:solid; border-color:rgb(30,30,30) }"
                 "QLineEdit { border-width: 1px; border-style: solid; border-color:rgb(30,30,30) }"
                 "QCheckBox::indicator:unchecked { background-color:rgb(30,30,30);border-width:1px; "
                 "border-style:solid;border-color:black }"
                 "QCheckBox::indicator:checked { background-color:red;border-width:1px; "
                 "border-style:solid;border-color:black }"
                 "QRadioButton::indicator:unchecked { background-color:rgb(30,30,30) }"
                 "QRadioButton::indicator:checked { background-color:red }"
                 "QRoundProgressBar { alternate-background-color:black }"
                 "QDateTimeEdit {background-color:rgb(30,30,30); border-width: 1px; border-style:solid; "
                 "border-color:rgb(30,30,30) }"
                 "QHeaderView { color:red;background-color:black }"
                 "QHeaderView::Section { background-color:rgb(30,30,30) }"
                 "QTableCornerButton::section{ background-color:rgb(30,30,30) }"
                 "");
             qDebug() << "stylesheet set";
 #endif
         }
         else
         {
             if (KStars::Instance()->wiView())
                 KStars::Instance()->wiView()->setNightVisionOn(false);
             QApplication::setPalette(OriginalPalette);
 #ifdef Q_OS_OSX
             qDebug() << "setting light stylesheet";
             qApp->setStyleSheet("");
             qDebug() << "stylesheet set";
 #endif
         }
 #ifdef HAVE_INDI
         if (KStars::Instance()->ekosManager())
         {
             if (KStars::Instance()->ekosManager()->guideModule())
             {
                 KStars::Instance()->ekosManager()->guideModule()->refreshColorScheme();
             }
         }
 #endif
 
         Options::setColorSchemeFile(name);
 
         map()->forceUpdate();
     }
 }
 
 void KStars::exportImage(const QString &url, int w, int h, bool includeLegend)
 {
     ImageExporter *m_ImageExporter = m_KStarsData->imageExporter();
 
     if (w <= 0)
         w = map()->width();
     if (h <= 0)
         h = map()->height();
 
     QSize size(w, h);
 
     m_ImageExporter->includeLegend(includeLegend);
     m_ImageExporter->setRasterOutputSize(&size);
     m_ImageExporter->exportImage(url);
 }
 
 QString KStars::getDSSURL(const QString &objectName)
 {
     SkyObject *target = data()->objectNamed(objectName);
     if (!target)
     {
         return QString("ERROR");
     }
     else
     {
         return KSDssDownloader::getDSSURL(target);
     }
 }
 
 QString KStars::getDSSURL(double RA_J2000, double Dec_J2000, float width, float height)
 {
     dms ra(RA_J2000), dec(Dec_J2000);
     return KSDssDownloader::getDSSURL(ra, dec, width, height);
 }
 
 QString KStars::getObjectDataXML(const QString &objectName)
 {
     SkyObject *target = data()->objectNamed(objectName);
     if (!target)
     {
         return QString("<xml></xml>");
     }
     QString output;
     QXmlStreamWriter stream(&output);
     stream.setAutoFormatting(true);
     stream.writeStartDocument();
     stream.writeStartElement("object");
     stream.writeTextElement("Name", target->name());
     stream.writeTextElement("Alt_Name", target->name2());
     stream.writeTextElement("Long_Name", target->longname());
     stream.writeTextElement("Constellation",
                             KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(target));
     stream.writeTextElement("RA_Dec_Epoch_JD", QString::number(target->getLastPrecessJD(), 'f', 3));
     stream.writeTextElement("RA_HMS", target->ra().toHMSString());
     stream.writeTextElement("Dec_DMS", target->dec().toDMSString());
     stream.writeTextElement("RA_J2000_HMS", target->ra0().toHMSString());
     stream.writeTextElement("Dec_J2000_DMS", target->dec0().toDMSString());
     stream.writeTextElement("RA_Degrees", QString::number(target->ra().Degrees()));
     stream.writeTextElement("Dec_Degrees", QString::number(target->dec().Degrees()));
     stream.writeTextElement("RA_J2000_Degrees", QString::number(target->ra0().Degrees()));
     stream.writeTextElement("Dec_J2000_Degrees", QString::number(target->dec0().Degrees()));
     stream.writeTextElement("Type", target->typeName());
     stream.writeTextElement("Magnitude", QString::number(target->mag(), 'g', 2));
     stream.writeTextElement("Position_Angle", QString::number(target->pa(), 'g', 3));
     StarObject *star   = dynamic_cast<StarObject *>(target);
     DeepSkyObject *dso = dynamic_cast<DeepSkyObject *>(target);
     if (star)
     {
         stream.writeTextElement("Spectral_Type", star->sptype());
         stream.writeTextElement("Genetive_Name", star->gname());
         stream.writeTextElement("Greek_Letter", star->greekLetter());
         stream.writeTextElement("Proper_Motion", QString::number(star->pmMagnitude()));
         stream.writeTextElement("Proper_Motion_RA", QString::number(star->pmRA()));
         stream.writeTextElement("Proper_Motion_Dec", QString::number(star->pmDec()));
         stream.writeTextElement("Parallax_mas", QString::number(star->parallax()));
         stream.writeTextElement("Distance_pc", QString::number(star->distance()));
         stream.writeTextElement("Henry_Draper", QString::number(star->getHDIndex()));
         stream.writeTextElement("BV_Index", QString::number(star->getBVIndex()));
     }
     else if (dso)
     {
         stream.writeTextElement("Catalog", dso->catalog());
         stream.writeTextElement("Major_Axis", QString::number(dso->a()));
         stream.writeTextElement("Minor_Axis", QString::number(dso->a() * dso->e()));
     }
     stream.writeEndElement(); // object
     stream.writeEndDocument();
     return output;
 }
 
 QString KStars::getObjectPositionInfo(const QString &objectName)
 {
     Q_ASSERT(data());
     const SkyObject *obj = data()->objectNamed(objectName); // make sure we work with a clone
     if (!obj)
     {
         return QString("<xml></xml>");
     }
     SkyObject *target = obj->clone();
     if (!target) // should not happen
     {
         qWarning() << "ERROR: Could not clone SkyObject " << objectName << "!";
         return QString("<xml></xml>");
     }
 
     const KSNumbers *updateNum = data()->updateNum();
     const KStarsDateTime ut    = data()->ut();
     const GeoLocation *geo     = data()->geo();
     QString riseTimeString, setTimeString, transitTimeString;
     QString riseAzString, setAzString, transitAltString;
 
     // Make sure the coordinates of the SkyObject are updated
     target->updateCoords(updateNum, true, geo->lat(), data()->lst(), true);
     target->EquatorialToHorizontal(data()->lst(), geo->lat());
 
     // Compute rise, set and transit times and parameters -- Code pulled from DetailDialog
     QTime riseTime    = target->riseSetTime(ut, geo, true);   //true = use rise time
     dms riseAz        = target->riseSetTimeAz(ut, geo, true); //true = use rise time
     QTime transitTime = target->transitTime(ut, geo);
     dms transitAlt    = target->transitAltitude(ut, geo);
     if (transitTime < riseTime)
     {
         transitTime = target->transitTime(ut.addDays(1), geo);
         transitAlt  = target->transitAltitude(ut.addDays(1), geo);
     }
     //If set time is before rise time, use set time for tomorrow
     QTime setTime = target->riseSetTime(ut, geo, false);   //false = use set time
     dms setAz     = target->riseSetTimeAz(ut, geo, false); //false = use set time
     if (setTime < riseTime)
     {
         setTime = target->riseSetTime(ut.addDays(1), geo, false);   //false = use set time
         setAz   = target->riseSetTimeAz(ut.addDays(1), geo, false); //false = use set time
     }
     if (riseTime.isValid())
     {
         riseTimeString = QString().sprintf("%02d:%02d", riseTime.hour(), riseTime.minute());
         setTimeString  = QString().sprintf("%02d:%02d", setTime.hour(), setTime.minute());
         riseAzString   = riseAz.toDMSString(true, true);
         setAzString    = setAz.toDMSString(true, true);
     }
     else
     {
         if (target->alt().Degrees() > 0.0)
         {
             riseTimeString = setTimeString = QString("Circumpolar");
         }
         else
         {
             riseTimeString = setTimeString = QString("Never Rises");
         }
         riseAzString = setAzString = QString("N/A");
     }
 
     transitTimeString = QString().sprintf("%02d:%02d", transitTime.hour(), transitTime.minute());
     transitAltString  = transitAlt.toDMSString(true, true);
 
     QString output;
     QXmlStreamWriter stream(&output);
     stream.setAutoFormatting(true);
     stream.writeStartDocument();
     stream.writeStartElement("object");
     stream.writeTextElement("Name", target->name());
     stream.writeTextElement("RA_Dec_Epoch_JD", QString::number(target->getLastPrecessJD(), 'f', 3));
     stream.writeTextElement("AltAz_JD", QString::number(data()->ut().djd(), 'f', 3));
     stream.writeTextElement("RA_HMS", target->ra().toHMSString(true));
     stream.writeTextElement("Dec_DMS", target->dec().toDMSString(true, true));
     stream.writeTextElement("RA_J2000_HMS", target->ra0().toHMSString(true));
     stream.writeTextElement("Dec_J2000_DMS", target->dec0().toDMSString(true, true));
     stream.writeTextElement("RA_Degrees", QString::number(target->ra().Degrees()));
     stream.writeTextElement("Dec_Degrees", QString::number(target->dec().Degrees()));
     stream.writeTextElement("RA_J2000_Degrees", QString::number(target->ra0().Degrees()));
     stream.writeTextElement("Dec_J2000_Degrees", QString::number(target->dec0().Degrees()));
     stream.writeTextElement("Altitude_DMS", target->alt().toDMSString(true, true));
     stream.writeTextElement("Azimuth_DMS", target->az().toDMSString(true, true));
     stream.writeTextElement("Altitude_Degrees", QString::number(target->alt().Degrees()));
     stream.writeTextElement("Azimuth_Degrees", QString::number(target->az().Degrees()));
     stream.writeTextElement("Rise", riseTimeString);
     stream.writeTextElement("Rise_Az_DMS", riseAzString);
     stream.writeTextElement("Set", setTimeString);
     stream.writeTextElement("Set_Az_DMS", setAzString);
     stream.writeTextElement("Transit", transitTimeString);
     stream.writeTextElement("Transit_Alt_DMS", transitAltString);
     stream.writeTextElement("Time_Zone_Offset", QString().sprintf("%02.2f", geo->TZ()));
 
     stream.writeEndElement(); // object
     stream.writeEndDocument();
     return output;
 }
 
 void KStars::renderEyepieceView(const QString &objectName, const QString &destPathChart, const double fovWidth,
                                 const double fovHeight, const double rotation, const double scale, const bool flip,
                                 const bool invert, QString imagePath, const QString &destPathImage, const bool overlay,
                                 const bool invertColors)
 {
     const SkyObject *obj = data()->objectNamed(objectName);
     if (!obj)
     {
         qCWarning(KSTARS) << "Object named " << objectName << " was not found!";
         return;
     }
     SkyObject *target          = obj->clone();
     const KSNumbers *updateNum = data()->updateNum();
     const KStarsDateTime ut    = data()->ut();
     const GeoLocation *geo     = data()->geo();
     QPixmap *renderChart       = new QPixmap();
-    QPixmap *renderImage       = 0;
+    QPixmap *renderImage       = nullptr;
     QTemporaryFile tempFile;
     if (overlay || (!destPathImage.isEmpty()))
     {
         if (!QFile::exists(imagePath))
         {
             // We must download a DSS image
             tempFile.open();
             QEventLoop loop;
             std::function<void(bool)> slot = [&loop](bool unused) {
                 Q_UNUSED(unused);
                 loop.quit();
             };
             new KSDssDownloader(target, tempFile.fileName(), slot, this);
             qDebug() << "DSS download requested. Waiting for download to complete...";
             loop.exec(); // wait for download to complete
             imagePath = tempFile.fileName();
         }
         if (QFile::exists(imagePath)) // required because DSS Download may fail
             renderImage = new QPixmap();
     }
 
     // Make sure the coordinates of the SkyObject are updated
     target->updateCoords(updateNum, true, geo->lat(), data()->lst(), true);
     target->EquatorialToHorizontal(data()->lst(), geo->lat());
 
     EyepieceField::renderEyepieceView(target, renderChart, fovWidth, fovHeight, rotation, scale, flip, invert,
                                       imagePath, renderImage, overlay, invertColors);
     renderChart->save(destPathChart);
     delete renderChart;
     if (renderImage)
     {
         renderImage->save(destPathImage);
         delete renderImage;
     }
 }
 QString KStars::getObservingWishListObjectNames()
 {
     QString output;
 
     for (auto &object : KStarsData::Instance()->observingList()->obsList())
     {
         output.append(object->name() + '\n');
     }
     return output;
 }
 
 QString KStars::getObservingSessionPlanObjectNames()
 {
     QString output;
 
     for (auto &object : KStarsData::Instance()->observingList()->sessionList())
     {
         output.append(object->name() + '\n');
     }
     return output;
 }
 
 void KStars::setApproxFOV(double FOV_Degrees)
 {
     zoom(map()->width() / (FOV_Degrees * dms::DegToRad));
 }
 
 QString KStars::getSkyMapDimensions()
 {
     return (QString::number(map()->width()) + 'x' + QString::number(map()->height()));
 }
 void KStars::printImage(bool usePrintDialog, bool useChartColors)
 {
     //QPRINTER_FOR_NOW
     //    KPrinter printer( true, QPrinter::HighResolution );
     QPrinter printer(QPrinter::HighResolution);
     printer.setFullPage(false);
 
     //Set up the printer (either with the Print Dialog,
     //or using the default settings)
     bool ok(false);
     if (usePrintDialog)
     {
         //QPRINTER_FOR_NOW
         //        ok = printer.setup( this, i18n("Print Sky") );
         //QPrintDialog *dialog = KdePrint::createPrintDialog(&printer, this);
         QPrintDialog *dialog = new QPrintDialog(&printer, this);
         dialog->setWindowTitle(i18n("Print Sky"));
         if (dialog->exec() == QDialog::Accepted)
             ok = true;
         delete dialog;
     }
     else
     {
         //QPRINTER_FOR_NOW
         //        ok = printer.autoConfigure();
         ok = true;
     }
 
     if (ok)
     {
         QApplication::setOverrideCursor(Qt::WaitCursor);
 
         //Save current ColorScheme file name and switch to Star Chart
         //scheme (if requested)
         QString schemeName = data()->colorScheme()->fileName();
         if (useChartColors)
         {
             loadColorScheme("chart.colors");
         }
 
         map()->setupProjector();
         map()->exportSkyImage(&printer, true);
 
         //Restore old color scheme if necessary
         //(if printing was aborted, the ColorScheme is still restored)
         if (useChartColors)
         {
             loadColorScheme(schemeName);
             map()->forceUpdate();
         }
 
         QApplication::restoreOverrideCursor();
     }
 }
 
 bool KStars::openFITS(const QString &imageURL)
 {
     QUrl url(imageURL);
     return openFITS(url);
 }
 
 bool KStars::openFITS(const QUrl &imageURL)
 {
 #ifndef HAVE_CFITSIO
     qWarning() << "KStars does not support loading FITS. Please recompile KStars with FITS support.";
     return false;
 #else
     FITSViewer *fv = nullptr;
     if (Options::singleWindowOpenedFITS())
         fv = genericFITSViewer();
     else
     {
         fv = new FITSViewer((Options::independentWindowFITS()) ? nullptr : this);
         KStars::Instance()->getFITSViewersList().append(fv);
     }
     // Error opening file
     if (fv->addFITS(&imageURL) == -2)
     {
         delete (fv);
         return false;
     }
     else
     {
         fv->show();
         return true;
     }
 #endif
 }
diff --git a/kstars/oal/execute.cpp b/kstars/oal/execute.cpp
index 0bd80ff0e..da4b23349 100644
--- a/kstars/oal/execute.cpp
+++ b/kstars/oal/execute.cpp
@@ -1,483 +1,483 @@
 /***************************************************************************
                           execute.cpp  -  description
 
                              -------------------
     begin                : Friday July 21, 2009
     copyright            : (C) 2009 by Prakash Mohan
     email                : prakash.mohan@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "oal/execute.h"
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "observinglist.h"
 #include "dialogs/finddialog.h"
 #include "dialogs/locationdialog.h"
 #include "oal/observeradd.h"
 #include "skycomponents/skymapcomposite.h"
 #include "skyobjects/starobject.h"
 
 #include <QFileDialog>
 
 Execute::Execute()
 {
     QWidget *w = new QWidget;
     ui.setupUi(w);
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(w);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     QPushButton *execB  = new QPushButton(i18n("End Session"));
     QPushButton *addObs = new QPushButton(i18n("Manage Observers"));
     execB->setToolTip(i18n("Save and End the current session"));
     buttonBox->addButton(execB, QDialogButtonBox::ActionRole);
     buttonBox->addButton(addObs, QDialogButtonBox::ActionRole);
     connect(execB, SIGNAL(clicked()), this, SLOT(slotEndSession()));
     connect(addObs, SIGNAL(clicked()), this, SLOT(slotObserverAdd()));
 
     setWindowTitle(i18n("Execute Session"));
 
     //initialize the global logObject
     logObject = KStarsData::Instance()->logObject();
 
     //initialize the lists and parameters
     init();
     ui.Target->hide();
     ui.AddObject->hide();
     ui.RemoveObject->hide();
     ui.NextButton->hide();
     ui.NextButton->setEnabled(false);
     ui.Slew->setEnabled(false);
 
     //make connections
     connect(ui.NextButton, SIGNAL(clicked()), this, SLOT(slotNext()));
     connect(ui.Slew, SIGNAL(clicked()), this, SLOT(slotSlew()));
     connect(ui.Location, SIGNAL(clicked()), this, SLOT(slotLocation()));
     connect(ui.Target, SIGNAL(currentTextChanged(QString)), this, SLOT(slotSetTarget(QString)));
     connect(ui.SessionURL, SIGNAL(leftClickedUrl()), this, SLOT(slotShowSession()));
     connect(ui.ObservationsURL, SIGNAL(leftClickedUrl()), this, SLOT(slotShowTargets()));
     connect(ui.AddObject, SIGNAL(leftClickedUrl()), this, SLOT(slotAddObject()));
     connect(ui.RemoveObject, SIGNAL(leftClickedUrl()), this, SLOT(slotRemoveObject()));
 }
 
 void Execute::init()
 {
     //initialize geo to current location of the ObservingList
     geo = KStarsData::Instance()->geo();
     ui.Location->setText(geo->fullName());
 
     // JM: Aren't we suppose to take KStars time? The one returned by the OL is the time of the LAST object
     // in the list which doesn't make sense.
 
     /*
     //set the date time to the dateTime from the OL
     ui.Begin->setDateTime( ks->observingList()->dateTime() );
     */
     ui.Begin->setDateTime(KStarsData::Instance()->geo()->UTtoLT(KStarsData::Instance()->clock()->utc()));
 
     KStarsData::Instance()->logObject()->readAll();
 
     //load Targets
     loadTargets();
 
     //load Equipment
     loadEquipment();
 
     //load Observers
     loadObservers();
 
     if (logObject->scopeList()->isEmpty() || logObject->observerList()->isEmpty())
     {
         ui.hintLabel->show();
     }
     else
     {
         ui.hintLabel->hide();
     }
 
     //set Current Items
     loadCurrentItems();
 }
 void Execute::loadCurrentItems()
 {
     //Set the current target, equipments and observer
     if (currentTarget)
         ui.Target->setCurrentRow(findIndexOfTarget(currentTarget->name()), QItemSelectionModel::SelectCurrent);
     else
         ui.Target->setCurrentRow(0, QItemSelectionModel::SelectCurrent);
 
     if (currentObserver)
         ui.Observer->setCurrentIndex(ui.Observer->findText(currentObserver->name() + ' ' + currentObserver->surname()));
     if (currentScope)
         ui.Scope->setCurrentIndex(ui.Scope->findText(currentScope->name()));
     if (currentEyepiece)
         ui.Eyepiece->setCurrentIndex(ui.Eyepiece->findText(currentEyepiece->name()));
     if (currentLens)
         ui.Lens->setCurrentIndex(ui.Lens->findText(currentLens->name()));
     if (currentFilter)
         ui.Filter->setCurrentIndex(ui.Filter->findText(currentFilter->name()));
 }
 
 int Execute::findIndexOfTarget(QString name)
 {
     for (int i = 0; i < ui.Target->count(); i++)
         if (ui.Target->item(i)->text() == name)
             return i;
     return -1;
 }
 
 void Execute::slotNext()
 {
     switch (ui.stackedWidget->currentIndex())
     {
         case 0:
         {
             saveSession();
             break;
         }
         case 1:
         {
             addTargetNotes();
             break;
         }
         case 2:
         {
             addObservation();
             ui.stackedWidget->setCurrentIndex(1);
             ui.NextButton->setText(i18n("Next Page >"));
             QString prevTarget = currentTarget->name();
             loadTargets();
             ui.Target->setCurrentRow(findIndexOfTarget(prevTarget), QItemSelectionModel::SelectCurrent);
             selectNextTarget();
             break;
         }
     }
 }
 
 bool Execute::saveSession()
 {
     OAL::Site *site = logObject->findSiteByName(geo->fullName());
     if (!site)
     {
         while (logObject->findSiteById(i18n("site_") + QString::number(nextSite)))
             nextSite++;
         site = new OAL::Site(geo, i18n("site_") + QString::number(nextSite++));
         logObject->siteList()->append(site);
     }
     if (currentSession)
     {
         currentSession->setSession(currentSession->id(), site->id(), KStarsDateTime(ui.Begin->dateTime()),
                                    KStarsDateTime(ui.Begin->dateTime()), ui.Weather->toPlainText(),
                                    ui.Equipment->toPlainText(), ui.Comment->toPlainText(),
                                    ui.Language->text());
     }
     else
     {
         while (logObject->findSessionByName(i18n("session_") + QString::number(nextSession)))
             nextSession++;
         currentSession = new OAL::Session(i18n("session_") + QString::number(nextSession++), site->id(),
                                           KStarsDateTime(ui.Begin->dateTime()), KStarsDateTime(ui.Begin->dateTime()),
                                           ui.Weather->toPlainText(), ui.Equipment->toPlainText(),
                                           ui.Comment->toPlainText(), ui.Language->text());
         logObject->sessionList()->append(currentSession);
     }
     ui.stackedWidget->setCurrentIndex(1); //Move to the next page
     return true;
 }
 
 void Execute::slotLocation()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
     if (ld->exec() == QDialog::Accepted)
     {
         geo = ld->selectedCity();
         ui.Location->setText(geo->fullName());
     }
     delete ld;
 }
 
 void Execute::loadTargets()
 {
     ui.Target->clear();
     sortTargetList();
 
     for (auto &o : KStarsData::Instance()->observingList()->sessionList())
     {
         ui.Target->addItem(getObjectName(o.data(), false));
     }
 }
 
 void Execute::loadEquipment()
 {
     ui.Scope->clear();
     ui.Eyepiece->clear();
     ui.Lens->clear();
     ui.Filter->clear();
     foreach (OAL::Scope *s, *(logObject->scopeList()))
         ui.Scope->addItem(s->name());
     foreach (OAL::Eyepiece *e, *(logObject->eyepieceList()))
         ui.Eyepiece->addItem(e->name());
     foreach (OAL::Lens *l, *(logObject->lensList()))
         ui.Lens->addItem(l->name());
     foreach (OAL::Filter *f, *(logObject->filterList()))
         ui.Filter->addItem(f->name());
 }
 
 void Execute::loadObservers()
 {
     ui.Observer->clear();
     foreach (OAL::Observer *o, *(logObject->observerList()))
         ui.Observer->addItem(o->name() + ' ' + o->surname());
 }
 
 void Execute::sortTargetList()
 {
     auto timeLessThan = [](QSharedPointer<SkyObject> o1, QSharedPointer<SkyObject> o2) {
         QTime t1 = KStarsData::Instance()->observingList()->scheduledTime(o1.data());
         QTime t2 = KStarsData::Instance()->observingList()->scheduledTime(o2.data());
 
         if (t1 < QTime(12, 0, 0))
             t1.setHMS(t1.hour() + 12, t1.minute(), t1.second());
         else
             t1.setHMS(t1.hour() - 12, t1.minute(), t1.second());
         if (t2 < QTime(12, 0, 0))
             t2.setHMS(t2.hour() + 12, t2.minute(), t2.second());
         else
             t2.setHMS(t2.hour() - 12, t2.minute(), t2.second());
         return (t1 < t2);
     };
 
     qSort(KStarsData::Instance()->observingList()->sessionList().begin(),
           KStarsData::Instance()->observingList()->sessionList().end(), timeLessThan);
 }
 
 void Execute::addTargetNotes()
 {
     if (!ui.Target->count())
         return;
     SkyObject *o = KStarsData::Instance()->observingList()->findObjectByName(ui.Target->currentItem()->text());
     if (o)
     {
         currentTarget = o;
         o->setNotes(ui.Notes->toPlainText());
         ui.Notes->clear();
         loadObservationTab();
     }
 }
 
 void Execute::loadObservationTab()
 {
     ui.Time->setTime(KStarsDateTime::currentDateTime().time());
     ui.stackedWidget->setCurrentIndex(2);
     ui.NextButton->setText(i18n("Next Target >"));
 }
 
 bool Execute::addObservation()
 {
     slotSetCurrentObjects();
     while (logObject->findObservationByName(i18n("observation_") + QString::number(nextObservation)))
         nextObservation++;
     KStarsDateTime dt = currentSession->begin();
     dt.setTime(ui.Time->time());
     OAL::Observation *o = new OAL::Observation(
         i18n("observation_") + QString::number(nextObservation++), currentObserver, currentSession, currentTarget, dt,
         ui.FaintestStar->value(), ui.Seeing->value(), currentScope, currentEyepiece, currentLens, currentFilter,
         ui.Description->toPlainText(), ui.Language->text());
     logObject->observationList()->append(o);
     ui.Description->clear();
     return true;
 }
 void Execute::slotEndSession()
 {
     if (currentSession)
     {
         currentSession->setSession(currentSession->id(), currentSession->site(), KStarsDateTime(ui.Begin->dateTime()),
                                    KStarsDateTime::currentDateTime(), ui.Weather->toPlainText(),
                                    ui.Equipment->toPlainText(), ui.Comment->toPlainText(), ui.Language->text());
 
-        QUrl fileURL = QFileDialog::getSaveFileUrl(0, i18n("Save Session"), QUrl(QDir::homePath()), "*.xml");
+        QUrl fileURL = QFileDialog::getSaveFileUrl(nullptr, i18n("Save Session"), QUrl(QDir::homePath()), "*.xml");
 
         if (fileURL.isEmpty())
         {
             // Cancel
             return;
         }
 
         if (fileURL.isValid())
         {
             QFile f(fileURL.toLocalFile());
             if (!f.open(QIODevice::WriteOnly))
             {
                 QString message = i18n("Could not open file %1", f.fileName());
-                KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+                KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
                 return;
             }
             QTextStream ostream(&f);
             ostream << logObject->writeLog(false);
             f.close();
         }
     }
     hide();
     ui.stackedWidget->setCurrentIndex(0);
     logObject->observationList()->clear();
     logObject->sessionList()->clear();
     delete currentSession;
     currentTarget  = nullptr;
     currentSession = nullptr;
 }
 void Execute::slotObserverAdd()
 {
     QPointer<ObserverAdd> m_observerAdd = new ObserverAdd();
     m_observerAdd->exec();
     delete m_observerAdd;
 }
 
 void Execute::slotSetTarget(const QString &name)
 {
     currentTarget = KStarsData::Instance()->observingList()->findObjectByName(name);
     if (!currentTarget)
     {
         ui.NextButton->setEnabled(false);
         ui.Slew->setEnabled(false);
         return;
     }
     else
     {
         ui.NextButton->setEnabled(true);
         ui.Slew->setEnabled(true);
         KStarsData::Instance()->observingList()->selectObject(currentTarget);
         KStarsData::Instance()->observingList()->slotCenterObject();
         QString smag = "--";
         if (-30.0 < currentTarget->mag() && currentTarget->mag() < 90.0)
             smag = QString::number(currentTarget->mag(), 'g',
                                    2); // The lower limit to avoid display of unrealistic comet magnitudes
         ui.Mag->setText(smag);
         ui.Type->setText(currentTarget->typeName());
         ui.SchTime->setText(
             KStarsData::Instance()->observingList()->scheduledTime(currentTarget).toString("h:mm:ss AP"));
         SkyPoint p = currentTarget->recomputeCoords(KStarsDateTime::currentDateTime(), geo);
         dms lst(geo->GSTtoLST(KStarsDateTime::currentDateTime().gst()));
         p.EquatorialToHorizontal(&lst, geo->lat());
         ui.RA->setText(p.ra().toHMSString());
         ui.Dec->setText(p.dec().toDMSString());
         ui.Alt->setText(p.alt().toDMSString());
         ui.Az->setText(p.az().toDMSString());
         ui.Notes->setText(currentTarget->notes());
     }
 }
 
 void Execute::slotSlew()
 {
     KStarsData::Instance()->observingList()->slotSlewToObject();
 }
 
 void Execute::selectNextTarget()
 {
     int i = findIndexOfTarget(currentTarget->name()) + 1;
     if (i < ui.Target->count())
     {
         ui.Target->selectionModel()->clear();
         ui.Target->setCurrentRow(i, QItemSelectionModel::SelectCurrent);
     }
 }
 
 void Execute::slotSetCurrentObjects()
 {
     currentScope    = logObject->findScopeByName(ui.Scope->currentText());
     currentEyepiece = logObject->findEyepieceByName(ui.Eyepiece->currentText());
     currentLens     = logObject->findLensByName(ui.Lens->currentText());
     currentFilter   = logObject->findFilterByName(ui.Filter->currentText());
     currentObserver = logObject->findObserverByName(ui.Observer->currentText());
 }
 
 void Execute::slotShowSession()
 {
     ui.Target->hide();
     ui.stackedWidget->setCurrentIndex(0);
     ui.NextButton->hide();
     ui.AddObject->hide();
     ui.RemoveObject->hide();
 }
 
 void Execute::slotShowTargets()
 {
     if (saveSession())
     {
         ui.Target->show();
         ui.AddObject->show();
         ui.RemoveObject->show();
         ui.stackedWidget->setCurrentIndex(1);
         ui.NextButton->show();
         ui.NextButton->setText(i18n("Next Page >"));
     }
 }
 
 void Execute::slotAddObject()
 {
     QPointer<FindDialog> fd = new FindDialog(KStars::Instance());
     if (fd->exec() == QDialog::Accepted)
     {
         SkyObject *o = fd->targetObject();
-        if (o != 0)
+        if (o != nullptr)
         {
             KStarsData::Instance()->observingList()->slotAddObject(o, true);
             init();
         }
     }
     delete fd;
 }
 
 void Execute::slotRemoveObject()
 {
     QModelIndex i  = ui.Target->currentIndex();
     SkyObject *obj = nullptr;
 
     if (i.isValid())
     {
         QString ObjName = i.data().toString();
 
         obj = KStarsData::Instance()->skyComposite()->findByName(ObjName);
     }
 
     if (obj != nullptr)
     {
         KStarsData::Instance()->observingList()->slotRemoveObject(obj, true);
         loadTargets();
     }
 }
 
 QString Execute::getObjectName(const SkyObject *o, bool translated)
 {
     QString finalObjectName;
 
     if (o->name() == "star")
     {
         StarObject *s = (StarObject *)o;
 
         // JM: Enable HD Index stars to be added to the observing list.
         if (s->getHDIndex() != 0)
             finalObjectName = QString("HD %1").arg(QString::number(s->getHDIndex()));
     }
     else
         finalObjectName = translated ? o->translatedName() : o->name();
 
     return finalObjectName;
 }
diff --git a/kstars/oal/oal.h b/kstars/oal/oal.h
index 0bca812f1..6eef88587 100644
--- a/kstars/oal/oal.h
+++ b/kstars/oal/oal.h
@@ -1,63 +1,63 @@
 /***************************************************************************
                           oal.h  -  description
 
                              -------------------
     begin                : Friday June 19, 2009
     copyright            : (C) 2009 by Prakash Mohan
     email                : prakash.mohan@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef OAL_H_
 #define OAL_H_
 
 #include <QString>
 #include <QLocale>
 #ifndef KSTARS_LITE
 #include <kmessagebox.h>
 #endif
 #include <KLocalizedString>
 #include <KStandardGuiItem>
 
 /**
  * @namespace OAL
  *
  * Open Astronomy Log (OAL) is a free and open XML schema definition for all kinds of astronomical observations.
  * KStars supports this schema and enables an observer to share observations with other observers or move observations among software products.
  *
  * The Schema was developed by the German "Fachgruppe für Computerastronomie" (section for computerastronomy) which is a subsection of Germany's largest
  * astronomy union (VDS - Vereinigung der Sternfreunde e.V.)
  */
 namespace OAL
 {
 class Log;
 class Observer;
 class Observation;
 class Equipment;
 class Eyepiece;
 class Scope;
 class Filter;
 class Imager;
 class Site;
 class Session;
 class Target;
 class Lens;
 inline int warningOverwrite(QString message)
 {
 #ifndef KSTARS_LITE
-    return KMessageBox::warningYesNo(0, message, xi18n("Overwrite"), KStandardGuiItem::overwrite(),
+    return KMessageBox::warningYesNo(nullptr, message, xi18n("Overwrite"), KStandardGuiItem::overwrite(),
                                      KStandardGuiItem::cancel());
 #else
     return 0;
 #endif
 }
 }
 #endif
diff --git a/kstars/oal/observeradd.cpp b/kstars/oal/observeradd.cpp
index 5ac9f2403..db7f7b6fb 100644
--- a/kstars/oal/observeradd.cpp
+++ b/kstars/oal/observeradd.cpp
@@ -1,125 +1,125 @@
 /***************************************************************************
                           observeradd.cpp  -  description
 
                              -------------------
     begin                : Sunday July 26, 2009
     copyright            : (C) 2009 by Prakash Mohan
     email                : prakash.mohan@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "observeradd.h"
 
 #include "kstarsdata.h"
 
 #include <QSqlTableModel>
 
 ObserverAdd::ObserverAdd()
 {
     // Setting up the widget from the .ui file and adding it to the QDialog
     QWidget *widget = new QWidget;
 
     ui.setupUi(widget);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(widget);
     setLayout(mainLayout);
 
     setWindowTitle(i18n("Manage Observers"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     ui.AddObserverB->setIcon(QIcon::fromTheme("list-add", QIcon(":/icons/breeze/default/list-add.svg")));
     ui.RemoveObserverB->setIcon(QIcon::fromTheme("list-remove", QIcon(":/icons/breeze/default/list-remove.svg")));
 
     // Load the observers list from the file
     loadObservers();
     QSqlDatabase db       = KStarsData::Instance()->userdb()->GetDatabase();
-    QSqlTableModel *users = new QSqlTableModel(0, db);
+    QSqlTableModel *users = new QSqlTableModel(nullptr, db);
     users->setTable("user");
     users->select();
     ui.tableView->setModel(users);
     ui.tableView->setColumnHidden(0, true);
     ui.tableView->horizontalHeader()->resizeContentsPrecision();
     ui.tableView->viewport()->update();
     ui.AddObserverB->setEnabled(false);
     ui.RemoveObserverB->setEnabled(false);
     ui.tableView->setSelectionMode(QAbstractItemView::SingleSelection);
     // Make connections
     connect(ui.AddObserverB, SIGNAL(clicked()), this, SLOT(slotAddObserver()));
     connect(ui.RemoveObserverB, SIGNAL(clicked()), this, SLOT(slotRemoveObserver()));
     connect(ui.Name, SIGNAL(textChanged(QString)), this, SLOT(checkObserverInfo()));
     connect(ui.Surname, SIGNAL(textChanged(QString)), this, SLOT(checkObserverInfo()));
     //connect (ui.tableView->verticalHeader(),SIGNAL(sectionClicked(int)),this,SLOT(checkTableInfo()));
     connect(ui.tableView, SIGNAL(clicked(QModelIndex)), this, SLOT(auxSlot()));
 }
 void ObserverAdd::auxSlot()
 {
     ui.RemoveObserverB->setEnabled(true);
 }
 
 void ObserverAdd::checkObserverInfo()
 {
     if (ui.Name->text().isEmpty() || ui.Surname->text().isEmpty())
         ui.AddObserverB->setEnabled(false);
     else
         ui.AddObserverB->setEnabled(true);
 }
 
 void ObserverAdd::slotUpdateModel()
 {
     QSqlDatabase db       = KStarsData::Instance()->userdb()->GetDatabase();
-    QSqlTableModel *users = new QSqlTableModel(0, db);
+    QSqlTableModel *users = new QSqlTableModel(nullptr, db);
     users->setTable("user");
     users->select();
     ui.tableView->setModel(users);
     ui.tableView->setColumnHidden(0, true);
     ui.tableView->horizontalHeader()->resizeContentsPrecision();
     ui.tableView->viewport()->update();
 }
 
 void ObserverAdd::slotRemoveObserver()
 {
     QModelIndex index = ui.tableView->currentIndex();
     int nr            = index.row();
     QString s         = ui.tableView->model()->data(ui.tableView->model()->index(nr, 0)).toString();
 
     KStarsData::Instance()->userdb()->DeleteObserver(s);
     ui.RemoveObserverB->setEnabled(false);
     slotUpdateModel();
 }
 
 void ObserverAdd::slotAddObserver()
 {
     if (KStarsData::Instance()->userdb()->FindObserver(ui.Name->text(), ui.Surname->text()))
     {
         if (OAL::warningOverwrite(
                 i18n("Another Observer already exists with the given Name and Surname, Overwrite?")) == KMessageBox::No)
             return;
     }
 
     KStarsData::Instance()->userdb()->AddObserver(ui.Name->text(), ui.Surname->text(), ui.Contact->text());
 
     //Reload observers into OAL::m_observers
     loadObservers();
     // Reset the UI for a fresh addition
     ui.Name->clear();
     ui.Surname->clear();
     ui.Contact->clear();
     slotUpdateModel();
 }
 
 void ObserverAdd::loadObservers()
 {
     KStarsData::Instance()->logObject()->readObservers();
 }
diff --git a/kstars/options/opscatalog.cpp b/kstars/options/opscatalog.cpp
index 40bd01b2a..0888b77e4 100644
--- a/kstars/options/opscatalog.cpp
+++ b/kstars/options/opscatalog.cpp
@@ -1,394 +1,394 @@
 /***************************************************************************
                           opscatalog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 29  2004
     copyright            : (C) 2004 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "opscatalog.h"
 
 #include <QList>
 #include <QListWidgetItem>
 #include <QTextStream>
 #include <QFileDialog>
 
 #include <KActionCollection>
 #include <KConfigDialog>
 
 #include "Options.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "dialogs/addcatdialog.h"
 #include "widgets/magnitudespinbox.h"
 #include "skycomponents/catalogcomponent.h"
 #include "skycomponents/skymapcomposite.h"
 
 OpsCatalog::OpsCatalog() : QFrame(KStars::Instance())
 {
     setupUi(this);
 
     //Get a pointer to the KConfigDialog
     m_ConfigDialog = KConfigDialog::exists("settings");
 
     //Populate CatalogList
     populateInbuiltCatalogs();
 
     m_ShowMessier    = Options::showMessier();
     m_ShowMessImages = Options::showMessierImages();
     m_ShowNGC        = Options::showNGC();
     m_ShowIC         = Options::showIC();
 
     //    kcfg_MagLimitDrawStar->setValue( Options::magLimitDrawStar() );
     kcfg_StarDensity->setValue(Options::starDensity());
     //    kcfg_MagLimitDrawStarZoomOut->setValue( Options::magLimitDrawStarZoomOut() );
     //    m_MagLimitDrawStar = kcfg_MagLimitDrawStar->value();
     m_StarDensity = kcfg_StarDensity->value();
     //    m_MagLimitDrawStarZoomOut = kcfg_MagLimitDrawStarZoomOut->value();
 
     //    kcfg_MagLimitDrawStar->setMinimum( Options::magLimitDrawStarZoomOut() );
     //    kcfg_MagLimitDrawStarZoomOut->setMaximum( 12.0 );
 
     kcfg_MagLimitDrawDeepSky->setMaximum(16.0);
     kcfg_MagLimitDrawDeepSkyZoomOut->setMaximum(16.0);
 
     //disable star-related widgets if not showing stars
     if (!kcfg_ShowStars->isChecked())
         slotStarWidgets(false);
 
     //Add custom catalogs, if necessary
     /*
      * 1) Get the list from DB and add it as unchecked
      * 2) If the showCatalogNames list has any of the items, check it
     */
     m_CustomCatalogFile   = KStars::Instance()->data()->catalogdb()->Catalogs();
     m_CheckedCatalogNames = Options::showCatalogNames();
     populateCustomCatalogs();
 
     connect(CatalogList, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(updateCustomCatalogs()));
     connect(CatalogList, SIGNAL(itemSelectionChanged()), this, SLOT(selectCatalog()));
     connect(AddCatalog, SIGNAL(clicked()), this, SLOT(slotAddCatalog()));
     connect(LoadCatalog, SIGNAL(clicked()), this, SLOT(slotLoadCatalog()));
     connect(RemoveCatalog, SIGNAL(clicked()), this, SLOT(slotRemoveCatalog()));
 
     /*
     connect( kcfg_MagLimitDrawStar, SIGNAL( valueChanged(double) ),
              SLOT( slotSetDrawStarMagnitude(double) ) );
     connect( kcfg_MagLimitDrawStarZoomOut, SIGNAL( valueChanged(double) ),
              SLOT( slotSetDrawStarZoomOutMagnitude(double) ) );
     */
     connect(kcfg_ShowStars, SIGNAL(toggled(bool)), SLOT(slotStarWidgets(bool)));
     connect(kcfg_ShowDeepSky, SIGNAL(toggled(bool)), SLOT(slotDeepSkyWidgets(bool)));
     connect(kcfg_ShowDeepSkyNames, SIGNAL(toggled(bool)), kcfg_DeepSkyLongLabels, SLOT(setEnabled(bool)));
     connect(m_ConfigDialog->button(QDialogButtonBox::Apply), SIGNAL(clicked()), SLOT(slotApply()));
     connect(m_ConfigDialog->button(QDialogButtonBox::Ok), SIGNAL(clicked()), SLOT(slotApply()));
     connect(m_ConfigDialog->button(QDialogButtonBox::Cancel), SIGNAL(clicked()), SLOT(slotCancel()));
 
     // Keep track of changes
     connect(CatalogList, &QListWidget::itemChanged, this, [&]() { isDirty = true; });
     connect(catalogButtonGroup, static_cast<void (QButtonGroup::*)(int)>(&QButtonGroup::buttonPressed), this,
             [&]() { isDirty = true; });
 
     isDirty = false;
 }
 
 //empty destructor
 OpsCatalog::~OpsCatalog()
 {
 }
 
 void OpsCatalog::updateCustomCatalogs()
 {
     m_ShowMessier    = showMessier->checkState();
     m_ShowMessImages = showMessImages->checkState();
     m_ShowNGC        = showNGC->checkState();
     m_ShowIC         = showIC->checkState();
 
     int limit = m_CustomCatalogFile->size();
     for (int i = 0; i < limit; ++i)
     {
         QString name               = m_CustomCatalogFile->at(i);
         QList<QListWidgetItem *> l = CatalogList->findItems(name, Qt::MatchExactly);
 
         /*
          * Options::CatalogNames contains the list of those custom catalog
          * names which are to be checked.
          * For every checked item, we check if the option CatalogNames has
          * the name. If not, we add it.
          * For every unchecked item, we check if the option CatalogNames does
          * not contain the name. If it does, we remove it.
         */
         if (l.count() == 0)
             continue; // skip the name if no match found
         if (l[0]->checkState() == Qt::Checked)
         {
             if (!m_CheckedCatalogNames.contains(name))
             {
                 m_CheckedCatalogNames.append(name);
                 //isDirty = true;
             }
         }
         else if (l[0]->checkState() == Qt::Unchecked)
         {
             if (m_CheckedCatalogNames.contains(name))
             {
                 m_CheckedCatalogNames.removeAll(name);
                 //isDirty = true;
             }
         }
     }
 
     m_ConfigDialog->button(QDialogButtonBox::Apply)->setEnabled(false);
 }
 
 void OpsCatalog::selectCatalog()
 {
     //If selected item is a custom catalog, enable the remove button (otherwise, disable it)
     RemoveCatalog->setEnabled(false);
 
     if (!CatalogList->currentItem())
         return;
 
     //isDirty = true;
 
     foreach (SkyComponent *sc, KStars::Instance()->data()->skyComposite()->customCatalogs())
     {
         CatalogComponent *cc = (CatalogComponent *)sc;
         if (CatalogList->currentItem()->text() == cc->name())
         {
             RemoveCatalog->setEnabled(true);
             break;
         }
     }
 }
 
 void OpsCatalog::slotAddCatalog()
 {
     QPointer<AddCatDialog> ac = new AddCatDialog(KStars::Instance());
     if (ac->exec() == QDialog::Accepted)
     {
         KStars::Instance()->data()->catalogdb()->AddCatalogContents(ac->filename());
         refreshCatalogList();
         isDirty = true;
     }
     delete ac;
 }
 
 void OpsCatalog::slotLoadCatalog()
 {
     //Get the filename from the user
     QString filename = QFileDialog::getOpenFileName(KStars::Instance(), QString(), QDir::homePath(), "*");
     if (!filename.isEmpty())
     {
         KStars::Instance()->data()->catalogdb()->AddCatalogContents(filename);
         isDirty = true;
         refreshCatalogList();
     }
 
     m_ConfigDialog->button(QDialogButtonBox::Apply)->setEnabled(false);
 }
 
 void OpsCatalog::refreshCatalogList()
 {
     KStars::Instance()->data()->catalogdb()->Catalogs();
     populateCustomCatalogs();
 }
 
 void OpsCatalog::slotRemoveCatalog()
 {
     if (KMessageBox::warningYesNo(
-            0, i18n("The selected database will be removed. This action cannot be reversed! Delete Catalog?"),
+            nullptr, i18n("The selected database will be removed. This action cannot be reversed! Delete Catalog?"),
             i18n("Delete Catalog?")) == KMessageBox::No)
     {
-        KMessageBox::information(0, "Catalog deletion cancelled.");
+        KMessageBox::information(nullptr, "Catalog deletion cancelled.");
         return;
     }
 
     isDirty = true;
 
     //Ask DB to remove catalog
     KStars::Instance()->data()->catalogdb()->RemoveCatalog(CatalogList->currentItem()->text());
 
     // Remove from Options if it exists in it (i.e. was marked as visible)
     // This does not remove it from the database or from the widget in Options
     QList<QString> checkedlist = Options::showCatalogNames();
     if (checkedlist.contains(CatalogList->currentItem()->text()))
     {
         checkedlist.removeAll(CatalogList->currentItem()->text());
         Options::setShowCatalogNames(checkedlist);
     }
 
     //Remove entry in the QListView
     QListWidgetItem *todelete = CatalogList->takeItem(CatalogList->row(CatalogList->currentItem()));
     delete todelete;
     refreshCatalogList();
     m_ConfigDialog->button(QDialogButtonBox::Apply)->setEnabled(false);
     KStars::Instance()->data()->skyComposite()->reloadDeepSky();
 }
 
 /*
 void OpsCatalog::slotSetDrawStarMagnitude(double newValue) {
     m_MagLimitDrawStar = newValue;
     kcfg_MagLimitDrawStarZoomOut->setMaximum( newValue );
     m_ConfigDialog->enableButtonApply( true );
 }
 
 void OpsCatalog::slotSetDrawStarZoomOutMagnitude(double newValue) {
     m_MagLimitDrawStarZoomOut = newValue;
     kcfg_MagLimitDrawStar->setMinimum( newValue );
     m_ConfigDialog->enableButtonApply( true );
 }
 */
 
 void OpsCatalog::slotApply()
 {
     if (isDirty == false)
         return;
 
     isDirty = false;
 
     refreshCatalogList();
 
     Options::setStarDensity(kcfg_StarDensity->value());
     //    Options::setMagLimitDrawStarZoomOut( kcfg_MagLimitDrawStarZoomOut->value() );
 
     //FIXME: need to add the ShowDeepSky meta-option to the config dialog!
     //For now, I'll set showDeepSky to true if any catalog options changed
     if (m_ShowMessier != Options::showMessier() || m_ShowMessImages != Options::showMessierImages() ||
         m_ShowNGC != Options::showNGC() || m_ShowIC != Options::showIC())
     {
         Options::setShowDeepSky(true);
     }
 
     updateCustomCatalogs();
 
     KStars::Instance()->data()->skyComposite()->reloadDeepSky();
 
     // update time for all objects because they might be not initialized
     // it's needed when using horizontal coordinates
     KStars::Instance()->data()->setFullTimeUpdate();
     KStars::Instance()->updateTime();
     KStars::Instance()->map()->forceUpdate();
 
     Options::setShowCatalogNames(m_CheckedCatalogNames);
 
     Options::setShowMessier(m_ShowMessier);
     Options::setShowMessierImages(m_ShowMessImages);
     Options::setShowNGC(m_ShowNGC);
     Options::setShowIC(m_ShowIC);
 }
 
 void OpsCatalog::slotCancel()
 {
     //Revert all local option placeholders to the values in the global config object
     //    m_MagLimitDrawStar = Options::magLimitDrawStar();
     m_StarDensity = Options::starDensity();
     //    m_MagLimitDrawStarZoomOut = Options::magLimitDrawStarZoomOut();
 
     m_ShowMessier    = Options::showMessier();
     m_ShowMessImages = Options::showMessierImages();
     m_ShowNGC        = Options::showNGC();
     m_ShowIC         = Options::showIC();
 
     m_ShowCustomCatalog = Options::showCatalog();
 }
 
 void OpsCatalog::slotStarWidgets(bool on)
 {
     //    LabelMagStars->setEnabled(on);
     LabelStarDensity->setEnabled(on);
     //    LabelMagStarsZoomOut->setEnabled(on);
     LabelDensity->setEnabled(on);
     //    LabelMag1->setEnabled(on);
     //    LabelMag2->setEnabled(on);
     //    kcfg_MagLimitDrawStar->setEnabled(on);
     kcfg_StarDensity->setEnabled(on);
     LabelStarDensity->setEnabled(on);
     //    kcfg_MagLimitDrawStarZoomOut->setEnabled(on);
     kcfg_StarLabelDensity->setEnabled(on);
     kcfg_ShowStarNames->setEnabled(on);
     kcfg_ShowStarMagnitudes->setEnabled(on);
 }
 
 void OpsCatalog::slotDeepSkyWidgets(bool on)
 {
     CatalogList->setEnabled(on);
     AddCatalog->setEnabled(on);
     LoadCatalog->setEnabled(on);
     LabelMagDeepSky->setEnabled(on);
     LabelMagDeepSkyZoomOut->setEnabled(on);
     kcfg_MagLimitDrawDeepSky->setEnabled(on);
     kcfg_MagLimitDrawDeepSkyZoomOut->setEnabled(on);
     kcfg_ShowDeepSkyNames->setEnabled(on);
     kcfg_ShowDeepSkyMagnitudes->setEnabled(on);
     kcfg_DeepSkyLabelDensity->setEnabled(on);
     kcfg_DeepSkyLongLabels->setEnabled(on);
     LabelMag3->setEnabled(on);
     LabelMag4->setEnabled(on);
     if (on)
     {
         //Enable RemoveCatalog if the selected catalog is custom
         selectCatalog();
     }
     else
     {
         RemoveCatalog->setEnabled(on);
     }
 }
 
 void OpsCatalog::populateInbuiltCatalogs()
 {
     showIC = new QListWidgetItem(i18n("Index Catalog (IC)"), CatalogList);
     showIC->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
     showIC->setCheckState(Options::showIC() ? Qt::Checked : Qt::Unchecked);
 
     showNGC = new QListWidgetItem(i18n("New General Catalog (NGC)"), CatalogList);
     showNGC->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
     showNGC->setCheckState(Options::showNGC() ? Qt::Checked : Qt::Unchecked);
 
     showMessImages = new QListWidgetItem(i18n("Messier Catalog (images)"), CatalogList);
     showMessImages->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
     showMessImages->setCheckState(Options::showMessierImages() ? Qt::Checked : Qt::Unchecked);
 
     showMessier = new QListWidgetItem(i18n("Messier Catalog (symbols)"), CatalogList);
     showMessier->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
     showMessier->setCheckState(Options::showMessier() ? Qt::Checked : Qt::Unchecked);
 }
 
 void OpsCatalog::populateCustomCatalogs()
 {
     QStringList toggleNames = Options::showCatalogNames();
     QStringList customList  = *m_CustomCatalogFile; // Create a copy
     QStringListIterator catalogIter(customList);
 
     while (catalogIter.hasNext())
     {
         QString catalogname = catalogIter.next();
         //Skip already existing items
         if (CatalogList->findItems(catalogname, Qt::MatchExactly).length() > 0)
             continue;
 
         //Allocate new catalog list item
         QListWidgetItem *newItem = new QListWidgetItem(catalogname, CatalogList);
         newItem->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
 
         if (toggleNames.contains(catalogname))
         {
             newItem->setCheckState(Qt::Checked);
         }
         else
         {
             newItem->setCheckState(Qt::Unchecked);
         }
     }
 }
diff --git a/kstars/options/opscolors.cpp b/kstars/options/opscolors.cpp
index c7e599a19..ee7d48ec8 100644
--- a/kstars/options/opscolors.cpp
+++ b/kstars/options/opscolors.cpp
@@ -1,338 +1,338 @@
 /***************************************************************************
                           opscolors.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 29  2004
     copyright            : (C) 2004 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "opscolors.h"
 
 #include <config-kstars.h>
 
 #include <QFile>
 #include <QPixmap>
 #include <QTextStream>
 #include <QDoubleSpinBox>
 #include <QComboBox>
 #include <QPushButton>
 #include <QStandardPaths>
 #include <QColorDialog>
 #include <QInputDialog>
 
 #include <KActionCollection>
 #include <KLocalizedString>
 #include <KMessageBox>
 
 #include "kspaths.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "colorscheme.h"
 
 #ifdef HAVE_CFITSIO
 #include "fitsviewer/fitsviewer.h"
 #include "fitsviewer/fitsview.h"
 #endif
 
 #include "skyobjects/starobject.h"
 
 static int ItemColorData = Qt::UserRole + 1;
 
 OpsColors::OpsColors() : QFrame(KStars::Instance())
 {
     setupUi(this);
 
     //Populate list of adjustable colors
     for (unsigned int i = 0; i < KStarsData::Instance()->colorScheme()->numberOfColors(); ++i)
     {
         QPixmap col(30, 20);
         QColor itemColor(KStarsData::Instance()->colorScheme()->colorAt(i));
         col.fill(itemColor);
         QListWidgetItem *item = new QListWidgetItem(KStarsData::Instance()->colorScheme()->nameAt(i), ColorPalette);
         item->setData(Qt::DecorationRole, col);
         item->setData(ItemColorData, itemColor);
     }
 
     PresetBox->addItem(i18nc("use default color scheme", "Default Colors"));
     PresetBox->addItem(i18nc("use 'star chart' color scheme", "Star Chart"));
     PresetBox->addItem(i18nc("use 'night vision' color scheme", "Night Vision"));
     PresetBox->addItem(i18nc("use 'moonless night' color scheme", "Moonless Night"));
 
     PresetFileList.append("classic.colors");
     PresetFileList.append("chart.colors");
     PresetFileList.append("night.colors");
     PresetFileList.append("moonless-night.colors");
 
     QFile file;
     QString line, schemeName, filename;
     file.setFileName(KSPaths::locate(QStandardPaths::GenericDataLocation, "colors.dat"));
     if (file.exists() && file.open(QIODevice::ReadOnly))
     {
         QTextStream stream(&file);
 
         while (!stream.atEnd())
         {
             line       = stream.readLine();
             schemeName = line.left(line.indexOf(':'));
             filename   = line.mid(line.indexOf(':') + 1, line.length());
             PresetBox->addItem(schemeName);
             PresetFileList.append(filename);
         }
         file.close();
     }
 
     kcfg_StarColorIntensity->setValue(KStarsData::Instance()->colorScheme()->starColorIntensity());
     kcfg_StarColorMode->addItem(i18nc("use realistic star colors", "Real Colors"));
     kcfg_StarColorMode->addItem(i18nc("show stars as red circles", "Solid Red"));
     kcfg_StarColorMode->addItem(i18nc("show stars as black circles", "Solid Black"));
     kcfg_StarColorMode->addItem(i18nc("show stars as white circles", "Solid White"));
     kcfg_StarColorMode->addItem(i18nc("show stars as colored circles", "Solid Colors"));
     kcfg_StarColorMode->setCurrentIndex(KStarsData::Instance()->colorScheme()->starColorMode());
 
     if (KStarsData::Instance()->colorScheme()->starColorMode() != 0) //mode is not "Real Colors"
         kcfg_StarColorIntensity->setEnabled(false);
     else
         kcfg_StarColorIntensity->setEnabled(true);
 
     kcfg_DarkAppColors->setChecked(KStarsData::Instance()->colorScheme()->useDarkPalette());
 
     connect(ColorPalette, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(newColor(QListWidgetItem*)));
     connect(kcfg_StarColorIntensity, SIGNAL(valueChanged(int)), this, SLOT(slotStarColorIntensity(int)));
     connect(kcfg_StarColorMode, SIGNAL(activated(int)), this, SLOT(slotStarColorMode(int)));
     connect(kcfg_DarkAppColors, SIGNAL(toggled(bool)), this, SLOT(slotDarkAppColors(bool)));
     connect(PresetBox, SIGNAL(currentRowChanged(int)), this, SLOT(slotPreset(int)));
     connect(AddPreset, SIGNAL(clicked()), this, SLOT(slotAddPreset()));
     connect(RemovePreset, SIGNAL(clicked()), this, SLOT(slotRemovePreset()));
     connect(SavePreset, SIGNAL(clicked()), this, SLOT(slotSavePreset()));
 
     RemovePreset->setEnabled(false);
     SavePreset->setEnabled(false);
 }
 
 //empty destructor
 OpsColors::~OpsColors()
 {
 }
 
 void OpsColors::newColor(QListWidgetItem *item)
 {
     if (!item)
         return;
 
     QPixmap pixmap(30, 20);
     QColor NewColor;
 
     int index = ColorPalette->row(item);
     if (index < 0 || index >= ColorPalette->count())
         return;
     QColor col = item->data(ItemColorData).value<QColor>();
     NewColor   = QColorDialog::getColor(col);
 
     //NewColor will only be valid if the above if statement was found to be true during one of the for loop iterations
     if (NewColor.isValid())
     {        
         pixmap.fill(NewColor);
         item->setData(Qt::DecorationRole, pixmap);
         item->setData(ItemColorData, NewColor);
         KStarsData::Instance()->colorScheme()->setColor(KStarsData::Instance()->colorScheme()->keyAt(index),
                                                         NewColor.name());
     }
 
     if (PresetBox->currentRow() > 3)
         SavePreset->setEnabled(true);
 
     KStars::Instance()->map()->forceUpdate();
 
 #ifdef HAVE_CFITSIO
     QList<FITSViewer *> viewers = KStars::Instance()->findChildren<FITSViewer *>();
     foreach (FITSViewer *viewer, viewers)
         viewer->getCurrentView()->updateFrame();
 #endif
 }
 
 void OpsColors::slotPreset(int index)
 {
     QString sPreset = PresetFileList.at(index);    
     setColors(sPreset);
 }
 
 bool OpsColors::setColors(const QString &filename)
 {
     QPixmap temp(30, 20);
 
     //check if colorscheme is removable...
     QFile test;
      //try filename in local user KDE directory tree.
     test.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + filename);
     if (test.exists())
     {
         RemovePreset->setEnabled(true);
         SavePreset->setEnabled(true);
     }
     else
     {
         RemovePreset->setEnabled(false);
         SavePreset->setEnabled(false);
     }
     test.close();
 
     QString actionName = QString("cs_" + filename.left(filename.indexOf(".colors"))).toUtf8();
     QAction *a         = KStars::Instance()->actionCollection()->action(actionName);
     if (a)
         a->setChecked(true);
     qApp->processEvents();
 
     kcfg_StarColorMode->setCurrentIndex(KStarsData::Instance()->colorScheme()->starColorMode());
     kcfg_StarColorIntensity->setValue(KStarsData::Instance()->colorScheme()->starColorIntensity());
     kcfg_DarkAppColors->setChecked(KStarsData::Instance()->colorScheme()->useDarkPalette());
 
     for (unsigned int i = 0; i < KStarsData::Instance()->colorScheme()->numberOfColors(); ++i)
     {
         QColor itemColor(KStarsData::Instance()->colorScheme()->colorAt(i));
         temp.fill(itemColor);
         ColorPalette->item(i)->setData(Qt::DecorationRole, temp);
         ColorPalette->item(i)->setData(ItemColorData, itemColor);
     }
 
     KStars::Instance()->map()->forceUpdate();
 #ifdef HAVE_CFITSIO
     QList<FITSViewer *> viewers = KStars::Instance()->findChildren<FITSViewer *>();
     foreach (FITSViewer *viewer, viewers)
         viewer->getCurrentView()->updateFrame();
 #endif
 
     return true;
 }
 
 void OpsColors::slotAddPreset()
 {
     bool okPressed = false;
     QString schemename =
-        QInputDialog::getText(0, i18n("New Color Scheme"), i18n("Enter a name for the new color scheme:"),
-                              QLineEdit::Normal, QString(), &okPressed, 0);
+        QInputDialog::getText(nullptr, i18n("New Color Scheme"), i18n("Enter a name for the new color scheme:"),
+                              QLineEdit::Normal, QString(), &okPressed, nullptr);
 
     if (okPressed && !schemename.isEmpty())
     {
         if (KStarsData::Instance()->colorScheme()->save(schemename))
         {
             QListWidgetItem *item = new QListWidgetItem(schemename, PresetBox);
             QString fname         = KStarsData::Instance()->colorScheme()->fileName();
             PresetFileList.append(fname);
             QString actionName = QString("cs_" + fname.left(fname.indexOf(".colors"))).toUtf8();
             KStars::Instance()->addColorMenuItem(schemename, actionName);
 
             QAction *a = KStars::Instance()->actionCollection()->action(actionName);
             if (a)
                 a->setChecked(true);
             PresetBox->setCurrentItem(item);
         }
     }
 }
 
 void OpsColors::slotSavePreset()
 {
     QString schemename = PresetBox->currentItem()->text();
     KStarsData::Instance()->colorScheme()->save(schemename);
     SavePreset->setEnabled(false);
 }
 
 void OpsColors::slotRemovePreset()
 {
     QListWidgetItem *current = PresetBox->currentItem();
     if (!current)
         return;
     QString name     = current->text();
     QString filename = PresetFileList[PresetBox->currentRow()];
     QFile cdatFile;
     cdatFile.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) +
                          "colors.dat"); //determine filename in local user KDE directory tree.
 
     //Remove action from color-schemes menu
     KStars::Instance()->removeColorMenuItem(QString("cs_" + filename.left(filename.indexOf(".colors"))).toUtf8());
 
     if (!cdatFile.exists() || !cdatFile.open(QIODevice::ReadWrite))
     {
         QString message = i18n("Local color scheme index file could not be opened.\nScheme cannot be removed.");
-        KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+        KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
     }
     else
     {
         //Remove entry from the ListBox and from the QStringList holding filenames.
         //There seems to be no way to set no item selected, so select
         // the first item.
         PresetBox->setCurrentRow(0);
         PresetFileList.removeOne(filename);
         delete current;
         RemovePreset->setEnabled(false);
 
         //Read the contents of colors.dat into a QStringList, except for the entry to be removed.
         QTextStream stream(&cdatFile);
         QStringList slist;
         bool removed = false;
 
         while (!stream.atEnd())
         {
             QString line = stream.readLine();
             if (line.left(line.indexOf(':')) != name)
                 slist.append(line);
             else
                 removed = true;
         }
 
         if (removed) //Entry was removed; delete the corresponding .colors file.
         {
             QFile colorFile;
             colorFile.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) +
                                   filename); //determine filename in local user KDE directory tree.
             if (!colorFile.remove())
             {
                 QString message = i18n("Could not delete the file: %1", colorFile.fileName());
-                KMessageBox::sorry(0, message, i18n("Error Deleting File"));
+                KMessageBox::sorry(nullptr, message, i18n("Error Deleting File"));
             }
 
             //remove the old colors.dat file, and rebuild it with the modified string list.
             cdatFile.remove();
             cdatFile.open(QIODevice::ReadWrite);
             QTextStream stream2(&cdatFile);
             for (int i = 0; i < slist.count(); ++i)
                 stream << slist[i] << endl;
         }
         else
         {
             QString message = i18n("Could not find an entry named %1 in colors.dat.", name);
-            KMessageBox::sorry(0, message, i18n("Scheme Not Found"));
+            KMessageBox::sorry(nullptr, message, i18n("Scheme Not Found"));
         }
         cdatFile.close();
     }
 }
 
 void OpsColors::slotStarColorMode(int i)
 {
     KStarsData::Instance()->colorScheme()->setStarColorMode(i);
 
     if (KStarsData::Instance()->colorScheme()->starColorMode() != 0) //mode is not "Real Colors"
         kcfg_StarColorIntensity->setEnabled(false);
     else
         kcfg_StarColorIntensity->setEnabled(true);
 }
 
 void OpsColors::slotStarColorIntensity(int i)
 {
     KStarsData::Instance()->colorScheme()->setStarColorIntensity(i);
 }
 
 void OpsColors::slotDarkAppColors(bool enable)
 {
     KStarsData::Instance()->colorScheme()->setDarkPalette(enable);
     KStars::Instance()->loadColorScheme(KStars::Instance()->data()->colorScheme()->fileName());
 }
diff --git a/kstars/options/opssatellites.cpp b/kstars/options/opssatellites.cpp
index e1e4f8892..bf57d8f4c 100644
--- a/kstars/options/opssatellites.cpp
+++ b/kstars/options/opssatellites.cpp
@@ -1,299 +1,299 @@
 /***************************************************************************
                           opssatellites.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Mon 21 Mar 2011
     copyright            : (C) 2011 by Jérôme SONRIER
     email                : jsid@emor3j.fr.eu.org
  ***************************************************************************/
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "opssatellites.h"
 
 #include <QStandardItemModel>
 #include <QStatusBar>
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #include "satellite.h"
 #include "skymapcomposite.h"
 #include "skycomponents/satellitescomponent.h"
 #include "skymap.h"
 
 static const char *satgroup_strings_context = "Satellite group name";
 
 SatelliteSortFilterProxyModel::SatelliteSortFilterProxyModel(QObject *parent) : QSortFilterProxyModel(parent)
 {
 }
 
 bool SatelliteSortFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
 {
     QModelIndex index = sourceModel()->index(sourceRow, 0, sourceParent);
 
     if (sourceModel()->hasChildren(index))
     {
         for (int i = 0; i < sourceModel()->rowCount(index); ++i)
             if (filterAcceptsRow(i, index))
                 return true;
         return false;
     }
 
     return sourceModel()->data(index).toString().contains(filterRegExp());
 }
 
 OpsSatellites::OpsSatellites() : QFrame(KStars::Instance())
 {
     setupUi(this);
 
     m_ConfigDialog = KConfigDialog::exists("settings");
 
     //Set up the Table Views
     m_Model     = new QStandardItemModel(0, 1, this);
     m_SortModel = new SatelliteSortFilterProxyModel(this);
     m_SortModel->setSourceModel(m_Model);
     SatListTreeView->setModel(m_SortModel);
     SatListTreeView->setEditTriggers(QTreeView::NoEditTriggers);
     SatListTreeView->setSortingEnabled(false);
 
     // Populate satellites list
     updateListView();
 
     // Signals and slots connections
     connect(UpdateTLEButton, SIGNAL(clicked()), this, SLOT(slotUpdateTLEs()));
     connect(kcfg_ShowSatellites, SIGNAL(toggled(bool)), SLOT(slotShowSatellites(bool)));
     connect(m_ConfigDialog->button(QDialogButtonBox::Apply), SIGNAL(clicked()), SLOT(slotApply()));
     connect(m_ConfigDialog->button(QDialogButtonBox::Ok), SIGNAL(clicked()), SLOT(slotApply()));
     connect(m_ConfigDialog->button(QDialogButtonBox::Cancel), SIGNAL(clicked()), SLOT(slotCancel()));
     connect(FilterEdit, SIGNAL(textChanged(QString)), this, SLOT(slotFilterReg(QString)));
     connect(m_Model, SIGNAL(itemChanged(QStandardItem*)), this, SLOT(slotItemChanged(QStandardItem*)));
 
     connect(satelliteButtonGroup, static_cast<void (QButtonGroup::*)(int)>(&QButtonGroup::buttonPressed), this,
             [&]() { isDirty = true; });
 
     isDirty = false;
 }
 
 OpsSatellites::~OpsSatellites()
 {
 }
 
 void OpsSatellites::slotUpdateTLEs()
 {
     // Save existing satellites
     saveSatellitesList();
 
     // Get new data files
     KStarsData::Instance()->skyComposite()->satellites()->updateTLEs();
 
     isDirty = true;
 
     // Refresh satellites list
     updateListView();
 }
 
 void OpsSatellites::updateListView()
 {
     KStarsData *data = KStarsData::Instance();
 
     // Clear satellites list
     m_Model->clear();
     SatListTreeView->reset();
 
     m_Model->setHorizontalHeaderLabels(QStringList(i18n("Satellite name")));
 
     // Add each groups and satellites in the list
     foreach (SatelliteGroup *sat_group, data->skyComposite()->satellites()->groups())
     {
         QStandardItem *group_item;
         QStandardItem *sat_item;
         bool all_sat_checked   = true;
         bool all_sat_unchecked = true;
 
         // Add the group
         group_item = new QStandardItem(i18nc(satgroup_strings_context, sat_group->name().toUtf8()));
         group_item->setCheckable(true);
         m_Model->appendRow(group_item);
 
         // Add all satellites of the group
         for (int i = 0; i < sat_group->count(); ++i)
         {
             sat_item = new QStandardItem(sat_group->at(i)->name());
             sat_item->setCheckable(true);
             if (Options::selectedSatellites().contains(sat_group->at(i)->name()))
             {
                 sat_item->setCheckState(Qt::Checked);
                 all_sat_unchecked = false;
             }
             else
                 all_sat_checked = false;
             group_item->setChild(i, sat_item);
         }
 
         // If all satellites of the group are selected, select the group
         if (all_sat_checked)
             group_item->setCheckState(Qt::Checked);
         else if (all_sat_unchecked)
             group_item->setCheckState(Qt::Unchecked);
         else
             group_item->setCheckState(Qt::PartiallyChecked);
     }
 }
 
 void OpsSatellites::saveSatellitesList()
 {
     KStarsData *data = KStarsData::Instance();
     QString sat_name;
     QStringList selected_satellites;
     QModelIndex group_index, sat_index;
     QStandardItem *group_item;
     QStandardItem *sat_item;
 
     // Retrieve each satellite in the list and select it if checkbox is checked
     for (int i = 0; i < m_Model->rowCount(SatListTreeView->rootIndex()); ++i)
     {
         group_index = m_Model->index(i, 0, SatListTreeView->rootIndex());
         group_item  = m_Model->itemFromIndex(group_index);
 
         for (int j = 0; j < m_Model->rowCount(group_item->index()); ++j)
         {
             sat_index = m_Model->index(j, 0, group_index);
             sat_item  = m_Model->itemFromIndex(sat_index);
             sat_name  = sat_item->data(0).toString();
 
             Satellite *sat = data->skyComposite()->satellites()->findSatellite(sat_name);
             if (sat)
             {
                 if (sat_item->checkState() == Qt::Checked)
                 {
                     int rc = sat->updatePos();
                     // If position calculation fails, unselect it
                     if (rc == 0)
                     {
                         sat->setSelected(true);
                         selected_satellites.append(sat_name);
                     }
                     else
                     {
                         KStars::Instance()->statusBar()->showMessage(
                             i18n("%1 position calculation error: %2.", sat->name(), sat->sgp4ErrorString(rc)), 0);
                         sat->setSelected(false);
                         sat_item->setCheckState(Qt::Unchecked);
                     }
                 }
                 else
                 {
                     sat->setSelected(false);
                 }
             }
         }
     }
 
     Options::setSelectedSatellites(selected_satellites);
 }
 
 void OpsSatellites::slotApply()
 {
     if (isDirty == false)
         return;
 
     isDirty = false;
 
     saveSatellitesList();
 
     // update time for all objects because they might be not initialized
     // it's needed when using horizontal coordinates
     KStars::Instance()->data()->setFullTimeUpdate();
     KStars::Instance()->updateTime();
     KStars::Instance()->map()->forceUpdate();
 }
 
 void OpsSatellites::slotCancel()
 {
     // Update satellites list
     updateListView();
 }
 
 void OpsSatellites::slotShowSatellites(bool on)
 {
     isDirty = true;
     kcfg_ShowVisibleSatellites->setEnabled(on);
     kcfg_ShowSatellitesLabels->setEnabled(on);
     kcfg_DrawSatellitesLikeStars->setEnabled(on);
 }
 
 void OpsSatellites::slotFilterReg(const QString &filter)
 {
     m_SortModel->setFilterRegExp(QRegExp(filter, Qt::CaseInsensitive, QRegExp::RegExp));
     m_SortModel->setFilterKeyColumn(-1);
 
     isDirty = true;
 
     // Expand all categories when the user use filter
     if (filter.length() > 0)
         SatListTreeView->expandAll();
     else
         SatListTreeView->collapseAll();
 }
 
 void OpsSatellites::slotItemChanged(QStandardItem *item)
 {
-    if (item->parent() == 0 && !item->hasChildren())
+    if (item->parent() == nullptr && !item->hasChildren())
     {
         return;
     }
 
     isDirty = true;
 
     QModelIndex sat_index;
     QStandardItem *sat_item;
 
     disconnect(m_Model, SIGNAL(itemChanged(QStandardItem *)), this, SLOT(slotItemChanged(QStandardItem *)));
 
     // If a group has been (un)checked, (un)check all satellites of the group
     // else a satellite has been (un)checked, (un)check his group
     if (item->hasChildren())
     {
         for (int i = 0; i < m_Model->rowCount(item->index()); ++i)
         {
             sat_index = m_Model->index(i, 0, item->index());
             sat_item  = m_Model->itemFromIndex(sat_index);
 
             if (item->checkState() == Qt::Checked)
                 sat_item->setCheckState(Qt::Checked);
             else
                 sat_item->setCheckState(Qt::Unchecked);
         }
     }
     else
     {
         bool all_sat_checked   = true;
         bool all_sat_unchecked = true;
 
         for (int i = 0; i < item->parent()->model()->rowCount(item->parent()->index()); ++i)
         {
             sat_index = m_Model->index(i, 0, item->parent()->index());
             sat_item  = m_Model->itemFromIndex(sat_index);
 
             if (sat_item->checkState() == Qt::Checked)
                 all_sat_unchecked = false;
             else
                 all_sat_checked = false;
         }
 
         if (all_sat_checked)
             item->parent()->setCheckState(Qt::Checked);
         else if (all_sat_unchecked)
             item->parent()->setCheckState(Qt::Unchecked);
         else
             item->parent()->setCheckState(Qt::PartiallyChecked);
     }
 
     connect(m_Model, SIGNAL(itemChanged(QStandardItem*)), this, SLOT(slotItemChanged(QStandardItem*)));
 }
diff --git a/kstars/printing/detailstable.cpp b/kstars/printing/detailstable.cpp
index d8413c4c9..21f3346cf 100644
--- a/kstars/printing/detailstable.cpp
+++ b/kstars/printing/detailstable.cpp
@@ -1,729 +1,729 @@
 /***************************************************************************
                           detailstable.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Fri Jul 29 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "detailstable.h"
 
 #include <QTextDocument>
 #include <QTextTable>
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "ksplanetbase.h"
 #include "starobject.h"
 #include "skymapcomposite.h"
 #include "constellationboundarylines.h"
 #include "deepskyobject.h"
 #include "catalogcomponent.h"
 #include "ksmoon.h"
 #include "ksasteroid.h"
 #include "kscomet.h"
 
 DetailsTable::DetailsTable()
 {
     m_Document = new QTextDocument(KStars::Instance());
 
     setDefaultFormatting();
 }
 
 DetailsTable::~DetailsTable()
 {
     if (m_Document)
     {
         delete m_Document;
     }
 }
 
 void DetailsTable::createGeneralTable(SkyObject *obj)
 {
     clearContents();
 
     QTextCursor cursor = m_Document->rootFrame()->firstCursorPosition();
 
     //Fill in the data fields
     //Contents depend on type of object
-    StarObject *s      = 0;
-    DeepSkyObject *dso = 0;
-    KSPlanetBase *ps   = 0;
+    StarObject *s      = nullptr;
+    DeepSkyObject *dso = nullptr;
+    KSPlanetBase *ps   = nullptr;
     QString pname, oname;
 
     QString objNamesVal, objTypeVal, objDistVal, objSizeVal, objMagVal, objBvVal, objIllumVal;
     QString objSizeLabel, objMagLabel;
 
     switch (obj->type())
     {
         case SkyObject::STAR:
         {
             s = (StarObject *)obj;
 
             objNamesVal = s->longname();
 
             if (s->getHDIndex() != 0)
             {
                 if (!s->longname().isEmpty())
                 {
                     objNamesVal = s->longname() + QString(", HD%1").arg(QString::number(s->getHDIndex()));
                 }
 
                 else
                 {
                     objNamesVal = QString(", HD%1").arg(QString::number(s->getHDIndex()));
                 }
             }
 
             objTypeVal = s->sptype() + ' ' + i18n("star");
             objMagVal = i18nc("number in magnitudes", "%1 mag", QLocale().toString(s->mag(), 1)); //show to tenths place
 
             if (s->getBVIndex() < 30.0)
             {
                 objBvVal = QString::number(s->getBVIndex(), 'g', 2);
             }
 
             //distance
             if (s->distance() > 2000. || s->distance() < 0.) // parallax < 0.5 mas
             {
                 objDistVal = i18nc("larger than 2000 parsecs", "> 2000 pc");
             }
 
             else if (s->distance() > 50.0) //show to nearest integer
             {
                 objDistVal = i18nc("number in parsecs", "%1 pc", QLocale().toString(s->distance(), 0));
             }
 
             else if (s->distance() > 10.0) //show to tenths place
             {
                 objDistVal = i18nc("number in parsecs", "%1 pc", QLocale().toString(s->distance(), 1));
             }
 
             else //show to hundredths place
             {
                 objDistVal = i18nc("number in parsecs", "%1 pc", QLocale().toString(s->distance(), 2));
             }
 
             //Note multiplicity/variablility in angular size label
             if (s->isMultiple() && s->isVariable())
             {
                 objSizeLabel = i18nc("the star is a multiple star", "multiple") + ',';
                 objSizeVal   = i18nc("the star is a variable star", "variable");
             }
 
             else if (s->isMultiple())
             {
                 objSizeLabel = i18nc("the star is a multiple star", "multiple");
             }
 
             else if (s->isVariable())
             {
                 objSizeLabel = i18nc("the star is a variable star", "variable");
             }
 
             objIllumVal = "--";
 
             break; //End of stars case
         }
 
         case SkyObject::ASTEROID: //[fall through to planets]
 
         case SkyObject::COMET: //[fall through to planets]
 
         case SkyObject::MOON: //[fall through to planets]
 
         case SkyObject::PLANET:
         {
             ps = (KSPlanetBase *)obj;
 
             objNamesVal = ps->longname();
             //Type is "G5 star" for Sun
             if (ps->name() == "Sun")
             {
                 objTypeVal = i18n("G5 star");
             }
 
             else if (ps->name() == "Moon")
             {
                 objTypeVal = ps->translatedName();
             }
 
             else if (ps->name() == i18n("Pluto") || ps->name() == "Ceres" ||
                      ps->name() == "Eris") // TODO: Check if Ceres / Eris have translations and i18n() them
             {
                 objTypeVal = i18n("Dwarf planet");
             }
 
             else
             {
                 objTypeVal = ps->typeName();
             }
 
             //Magnitude: The moon displays illumination fraction instead
             if (obj->name() == "Moon")
             {
                 objIllumVal = QString("%1 %").arg(QLocale().toString(((KSMoon *)obj)->illum() * 100., 0));
             }
 
             objMagVal =
                 i18nc("number in magnitudes", "%1 mag", QLocale().toString(ps->mag(), 1)); //show to tenths place
 
             //Distance from Earth.  The moon requires a unit conversion
             if (ps->name() == "Moon")
             {
                 objDistVal = i18nc("distance in kilometers", "%1 km", QLocale().toString(ps->rearth() * AU_KM));
             }
 
             else
             {
                 objDistVal = i18nc("distance in Astronomical Units", "%1 AU", QLocale().toString(ps->rearth()));
             }
 
             //Angular size; moon and sun in arcmin, others in arcsec
             if (ps->angSize())
             {
                 if (ps->name() == "Sun" || ps->name() == "Moon")
                 {
                     // Needn't be a plural form because sun / moon will never contract to 1 arcminute
                     objSizeVal = i18nc("angular size in arcminutes", "%1 arcmin", QLocale().toString(ps->angSize()));
                 }
 
                 else
                 {
                     objSizeVal =
                         i18nc("angular size in arcseconds", "%1 arcsec", QLocale().toString(ps->angSize() * 60.0));
                 }
             }
 
             else
             {
                 objSizeVal = "--";
             }
 
             break; //End of planets/comets/asteroids case
         }
 
         default: //Deep-sky objects
         {
             dso = (DeepSkyObject *)obj;
 
             //Show all names recorded for the object
             if (!dso->longname().isEmpty() && dso->longname() != dso->name())
             {
                 pname = dso->translatedLongName();
                 oname = dso->translatedName();
             }
 
             else
             {
                 pname = dso->translatedName();
             }
 
             if (!dso->translatedName2().isEmpty())
             {
                 if (oname.isEmpty())
                 {
                     oname = dso->translatedName2();
                 }
 
                 else
                 {
                     oname += ", " + dso->translatedName2();
                 }
             }
 
             if (dso->ugc() != 0)
             {
                 if (!oname.isEmpty())
                 {
                     oname += ", ";
                 }
 
                 oname += "UGC " + QString::number(dso->ugc());
             }
             if (dso->pgc() != 0)
             {
                 if (!oname.isEmpty())
                 {
                     oname += ", ";
                 }
 
                 oname += "PGC " + QString::number(dso->pgc());
             }
 
             if (!oname.isEmpty())
             {
                 pname += ", " + oname;
             }
 
             objNamesVal = pname;
 
             objTypeVal = dso->typeName();
 
             if (dso->type() == SkyObject::RADIO_SOURCE)
             {
                 Q_ASSERT(dso->customCatalog());
                 objMagLabel =
                     i18nc("integrated flux at a frequency", "Flux(%1):", dso->customCatalog()->fluxFrequency());
                 objMagVal = i18nc("integrated flux value", "%1 %2", QLocale().toString(dso->flux(), 1),
                                   dso->customCatalog()->fluxUnit()); //show to tenths place
             }
 
             else if (dso->mag() > 90.0)
             {
                 objMagVal = "--";
             }
 
             else
             {
                 objMagVal =
                     i18nc("number in magnitudes", "%1 mag", QLocale().toString(dso->mag(), 1)); //show to tenths place
             }
 
             //No distances at this point...
             objDistVal = "--";
 
             //Only show decimal place for small angular sizes
             if (dso->a() > 10.0)
             {
                 objSizeVal = i18nc("angular size in arcminutes", "%1 arcmin", QLocale().toString(dso->a(), 0));
             }
 
             else if (dso->a())
             {
                 objSizeVal = i18nc("angular size in arcminutes", "%1 arcmin", QLocale().toString(dso->a(), 1));
             }
 
             else
             {
                 objSizeVal = "--";
             }
 
             break; //End of deep-space objects case
         }
     }
 
     //Common to all types:
     if (obj->type() == SkyObject::CONSTELLATION)
     {
         objTypeVal = KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(obj);
     }
 
     else
     {
         objTypeVal =
             i18nc("%1 type of sky object (planet, asteroid etc), %2 name of a constellation", "%1 in %2", objTypeVal,
                   KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(obj));
     }
 
     QVector<QTextLength> constraints;
     constraints << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25)
                 << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25);
     m_TableFormat.setColumnWidthConstraints(constraints);
 
     QTextTable *table = cursor.insertTable(5, 4, m_TableFormat);
     table->mergeCells(0, 0, 1, 4);
     QTextBlockFormat centered;
     centered.setAlignment(Qt::AlignCenter);
     table->cellAt(0, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(0, 0).firstCursorPosition().insertText(i18n("General"), m_TableTitleCharFormat);
 
     table->mergeCells(1, 1, 1, 3);
     table->cellAt(1, 0).firstCursorPosition().insertText(i18n("Names:"), m_ItemNameCharFormat);
     table->cellAt(1, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(1, 1).firstCursorPosition().insertText(objNamesVal, m_ItemValueCharFormat);
 
     table->cellAt(2, 0).firstCursorPosition().insertText(i18n("Type:"), m_ItemNameCharFormat);
     table->cellAt(2, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(2, 1).firstCursorPosition().insertText(objTypeVal, m_ItemValueCharFormat);
 
     table->cellAt(3, 0).firstCursorPosition().insertText(i18n("Distance:"), m_ItemNameCharFormat);
     table->cellAt(3, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(3, 1).firstCursorPosition().insertText(objDistVal, m_ItemValueCharFormat);
 
     table->cellAt(4, 0).firstCursorPosition().insertText(i18n("Size:"), m_ItemNameCharFormat);
     table->cellAt(4, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(4, 1).firstCursorPosition().insertText(objSizeVal, m_ItemValueCharFormat);
 
     table->cellAt(2, 2).firstCursorPosition().insertText(i18n("Magnitude:"), m_ItemNameCharFormat);
     table->cellAt(2, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(2, 3).firstCursorPosition().insertText(objMagVal, m_ItemValueCharFormat);
 
     table->cellAt(3, 2).firstCursorPosition().insertText(i18n("B-V index:"), m_ItemNameCharFormat);
     table->cellAt(3, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(3, 3).firstCursorPosition().insertText(objBvVal, m_ItemValueCharFormat);
 
     table->cellAt(4, 2).firstCursorPosition().insertText(i18n("Illumination:"), m_ItemNameCharFormat);
     table->cellAt(4, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(4, 3).firstCursorPosition().insertText(objIllumVal, m_ItemValueCharFormat);
 }
 
 void DetailsTable::createAsteroidCometTable(SkyObject *obj)
 {
     clearContents();
 
     QTextCursor cursor = m_Document->rootFrame()->firstCursorPosition();
 
     QString perihelionVal, orbitIdVal, neoVal, diamVal, rotPeriodVal, moidVal;
     QString orbitClassVal, albedoVal, dimVal, periodVal;
 
     // Add specifics data
     switch (obj->type())
     {
         case SkyObject::ASTEROID:
         {
             KSAsteroid *ast = (KSAsteroid *)obj;
 
             // Perihelion
             perihelionVal = QString::number(ast->getPerihelion()) + " AU";
 
             // Earth MOID
             moidVal = ast->getEarthMOID() == 0 ? QString("--") : QString::number(ast->getEarthMOID()) + QString(" AU");
 
             // Orbit ID
             orbitIdVal = ast->getOrbitID();
 
             // Orbit Class
             orbitClassVal = ast->getOrbitClass();
 
             // NEO
             neoVal = ast->isNEO() ? i18n("Yes") : i18n("No");
 
             // Albedo
             albedoVal = ast->getAlbedo() == 0 ? QString("--") : QString::number(ast->getAlbedo());
 
             // Diameter
             diamVal = ast->getDiameter() == 0 ? QString("--") : QString::number(ast->getDiameter()) + QString(" km");
 
             // Dimensions
             dimVal = ast->getDimensions().isEmpty() ? QString("--") : ast->getDimensions() + QString(" km");
 
             // Rotation period
             rotPeriodVal = ast->getRotationPeriod() == 0 ? QString("--") :
                                                            QString::number(ast->getRotationPeriod()) + QString(" h");
 
             // Period
             periodVal = ast->getPeriod() == 0 ? QString("--") : QString::number(ast->getPeriod()) + QString(" y");
 
             break;
         }
 
         case SkyObject::COMET:
         {
             KSComet *com = (KSComet *)obj;
 
             // Perihelion
             perihelionVal = QString::number(com->getPerihelion()) + " AU";
 
             // Earth MOID
             moidVal = com->getEarthMOID() == 0 ? QString("--") : QString::number(com->getEarthMOID()) + QString(" AU");
 
             // Orbit ID
             orbitIdVal = com->getOrbitID();
 
             // Orbit Class
             orbitClassVal = com->getOrbitClass();
 
             // NEO
             neoVal = com->isNEO() ? i18n("Yes") : i18n("No");
 
             // Albedo
             albedoVal = com->getAlbedo() == 0 ? QString("--") : QString::number(com->getAlbedo());
 
             // Diameter
             diamVal = com->getDiameter() == 0 ? QString("--") : QString::number(com->getDiameter()) + QString(" km");
 
             // Dimensions
             dimVal = com->getDimensions().isEmpty() ? QString("--") : com->getDimensions() + QString(" km");
 
             // Rotation period
             rotPeriodVal = com->getRotationPeriod() == 0 ? QString("--") :
                                                            QString::number(com->getRotationPeriod()) + QString(" h");
 
             // Period
             periodVal = com->getPeriod() == 0 ? QString("--") : QString::number(com->getPeriod()) + QString(" y");
 
             break;
         }
 
         default:
         {
             return;
         }
     }
 
     // Set column width constraints
     QVector<QTextLength> constraints;
     constraints << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25)
                 << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25);
     m_TableFormat.setColumnWidthConstraints(constraints);
 
     QTextTable *table = cursor.insertTable(6, 4, m_TableFormat);
     table->mergeCells(0, 0, 1, 4);
     QTextBlockFormat centered;
     centered.setAlignment(Qt::AlignCenter);
     table->cellAt(0, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(0, 0).firstCursorPosition().insertText(i18n("Asteroid/Comet details"), m_TableTitleCharFormat);
 
     table->cellAt(1, 0).firstCursorPosition().insertText(i18n("Perihelion:"), m_ItemNameCharFormat);
     table->cellAt(1, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(1, 1).firstCursorPosition().insertText(perihelionVal, m_ItemValueCharFormat);
 
     table->cellAt(2, 0).firstCursorPosition().insertText(i18n("Orbit ID:"), m_ItemNameCharFormat);
     table->cellAt(2, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(2, 1).firstCursorPosition().insertText(orbitIdVal, m_ItemValueCharFormat);
 
     table->cellAt(3, 0).firstCursorPosition().insertText(i18n("NEO:"), m_ItemNameCharFormat);
     table->cellAt(3, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(3, 1).firstCursorPosition().insertText(neoVal, m_ItemValueCharFormat);
 
     table->cellAt(4, 0).firstCursorPosition().insertText(i18n("Diameter:"), m_ItemNameCharFormat);
     table->cellAt(4, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(4, 1).firstCursorPosition().insertText(diamVal, m_ItemValueCharFormat);
 
     table->cellAt(5, 0).firstCursorPosition().insertText(i18n("Rotation period:"), m_ItemNameCharFormat);
     table->cellAt(5, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(5, 1).firstCursorPosition().insertText(rotPeriodVal, m_ItemValueCharFormat);
 
     table->cellAt(1, 2).firstCursorPosition().insertText(i18n("Earth MOID:"), m_ItemNameCharFormat);
     table->cellAt(1, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(1, 3).firstCursorPosition().insertText(moidVal, m_ItemValueCharFormat);
 
     table->cellAt(2, 2).firstCursorPosition().insertText(i18n("Orbit class:"), m_ItemNameCharFormat);
     table->cellAt(2, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(2, 3).firstCursorPosition().insertText(orbitClassVal, m_ItemValueCharFormat);
 
     table->cellAt(3, 2).firstCursorPosition().insertText(i18n("Albedo:"), m_ItemNameCharFormat);
     table->cellAt(3, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(3, 3).firstCursorPosition().insertText(albedoVal, m_ItemValueCharFormat);
 
     table->cellAt(4, 2).firstCursorPosition().insertText(i18n("Dimensions:"), m_ItemNameCharFormat);
     table->cellAt(4, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(4, 3).firstCursorPosition().insertText(dimVal, m_ItemValueCharFormat);
 
     table->cellAt(5, 2).firstCursorPosition().insertText(i18n("Period:"), m_ItemNameCharFormat);
     table->cellAt(5, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(5, 3).firstCursorPosition().insertText(periodVal, m_ItemValueCharFormat);
 }
 
 void DetailsTable::createCoordinatesTable(SkyObject *obj, const KStarsDateTime &ut, GeoLocation *geo)
 {
     clearContents();
 
     QTextCursor cursor = m_Document->rootFrame()->firstCursorPosition();
 
     // Set column width constraints
     QVector<QTextLength> constraints;
     constraints << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25)
                 << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25);
     m_TableFormat.setColumnWidthConstraints(constraints);
 
     // Insert table & row containing table name
     QTextTable *table = cursor.insertTable(4, 4, m_TableFormat);
     table->mergeCells(0, 0, 1, 4);
     QTextBlockFormat centered;
     centered.setAlignment(Qt::AlignCenter);
     table->cellAt(0, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(0, 0).firstCursorPosition().insertText(i18n("Coordinates"), m_TableTitleCharFormat);
 
     //Coordinates Section:
     //Don't use KLocale::formatNumber() for the epoch string,
     //because we don't want a thousands-place separator!
     QString sEpoch = QString::number(ut.epoch(), 'f', 1);
     //Replace the decimal point with localized decimal symbol
     sEpoch.replace('.', QLocale().decimalPoint());
 
     table->cellAt(1, 0).firstCursorPosition().insertText(i18n("RA (%1):", sEpoch), m_ItemNameCharFormat);
     table->cellAt(1, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(1, 1).firstCursorPosition().insertText(obj->ra().toHMSString(), m_ItemValueCharFormat);
 
     table->cellAt(2, 0).firstCursorPosition().insertText(i18n("Dec (%1):", sEpoch), m_ItemNameCharFormat);
     table->cellAt(2, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(2, 1).firstCursorPosition().insertText(obj->dec().toDMSString(), m_ItemValueCharFormat);
 
     table->cellAt(3, 0).firstCursorPosition().insertText(i18n("Hour angle:"), m_ItemNameCharFormat);
     table->cellAt(3, 0).firstCursorPosition().setBlockFormat(centered);
     //Hour Angle can be negative, but dms HMS expressions cannot.
     //Here's a kludgy workaround:
     dms lst = geo->GSTtoLST(ut.gst());
     dms ha(lst.Degrees() - obj->ra().Degrees());
     QChar sgn('+');
     if (ha.Hours() > 12.0)
     {
         ha.setH(24.0 - ha.Hours());
         sgn = '-';
     }
     table->cellAt(3, 1).firstCursorPosition().insertText(QString("%1%2").arg(sgn).arg(ha.toHMSString()),
                                                          m_ItemValueCharFormat);
 
     table->cellAt(1, 2).firstCursorPosition().insertText(i18n("Azimuth:"), m_ItemNameCharFormat);
     table->cellAt(1, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(1, 3).firstCursorPosition().insertText(obj->az().toDMSString(), m_ItemValueCharFormat);
 
     table->cellAt(2, 2).firstCursorPosition().insertText(i18n("Altitude:"), m_ItemNameCharFormat);
     table->cellAt(2, 2).firstCursorPosition().setBlockFormat(centered);
     dms a;
     if (Options::useAltAz())
     {
         a = obj->alt();
     }
 
     else
     {
         a = obj->altRefracted();
     }
     table->cellAt(2, 3).firstCursorPosition().insertText(a.toDMSString(), m_ItemValueCharFormat);
 
     table->cellAt(3, 2).firstCursorPosition().insertText(i18n("Airmass:"), m_ItemNameCharFormat);
     table->cellAt(3, 2).firstCursorPosition().setBlockFormat(centered);
     //Airmass is approximated as the secant of the zenith distance,
     //equivalent to 1./sin(Alt).  Beware of Inf at Alt=0!
     QString aMassStr;
     if (obj->alt().Degrees() > 0.0)
     {
         aMassStr = QLocale().toString(1. / sin(obj->alt().radians()), 2);
     }
 
     else
     {
         aMassStr = "--";
     }
     table->cellAt(3, 3).firstCursorPosition().insertText(aMassStr, m_ItemValueCharFormat);
 
     // Restore the position and other time-dependent parameters
     obj->recomputeCoords(ut, geo);
 }
 
 void DetailsTable::createRSTTAble(SkyObject *obj, const KStarsDateTime &ut, GeoLocation *geo)
 {
     clearContents();
 
     QTextCursor cursor = m_Document->rootFrame()->firstCursorPosition();
 
     QString rtValue, stValue;   // Rise/Set time values
     QString azRValue, azSValue; // Rise/Set azimuth values
 
     //Prepare time/position variables
     QTime rt = obj->riseSetTime(ut, geo, true);   //true = use rise time
     dms raz  = obj->riseSetTimeAz(ut, geo, true); //true = use rise time
 
     //If transit time is before rise time, use transit time for tomorrow
     QTime tt = obj->transitTime(ut, geo);
     dms talt = obj->transitAltitude(ut, geo);
     if (tt < rt)
     {
         tt   = obj->transitTime(ut.addDays(1), geo);
         talt = obj->transitAltitude(ut.addDays(1), geo);
     }
 
     //If set time is before rise time, use set time for tomorrow
     QTime st = obj->riseSetTime(ut, geo, false);   //false = use set time
     dms saz  = obj->riseSetTimeAz(ut, geo, false); //false = use set time
     if (st < rt)
     {
         st  = obj->riseSetTime(ut.addDays(1), geo, false);   //false = use set time
         saz = obj->riseSetTimeAz(ut.addDays(1), geo, false); //false = use set time
     }
 
     if (rt.isValid())
     {
         rtValue  = QString().sprintf("%02d:%02d", rt.hour(), rt.minute());
         stValue  = QString().sprintf("%02d:%02d", st.hour(), st.minute());
         azRValue = raz.toDMSString();
         azSValue = saz.toDMSString();
     }
 
     else
     {
         if (obj->alt().Degrees() > 0.0)
         {
             rtValue = i18n("Circumpolar");
             stValue = i18n("Circumpolar");
         }
 
         else
         {
             rtValue = i18n("Never rises");
             stValue = i18n("Never rises");
         }
 
         azRValue = i18nc("Not Applicable", "N/A");
         azSValue = i18nc("Not Applicable", "N/A");
     }
 
     // Set column width constraints
     QVector<QTextLength> constraints;
     constraints << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25)
                 << QTextLength(QTextLength::PercentageLength, 25) << QTextLength(QTextLength::PercentageLength, 25);
     m_TableFormat.setColumnWidthConstraints(constraints);
 
     // Insert table & row containing table name
     QTextTable *table = cursor.insertTable(4, 4, m_TableFormat);
     table->mergeCells(0, 0, 1, 4);
     QTextBlockFormat centered;
     centered.setAlignment(Qt::AlignCenter);
     table->cellAt(0, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(0, 0).firstCursorPosition().insertText(i18n("Rise/Set/Transit"), m_TableTitleCharFormat);
 
     // Insert cell names & values
     table->cellAt(1, 0).firstCursorPosition().insertText(i18n("Rise time:"), m_ItemNameCharFormat);
     table->cellAt(1, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(1, 1).firstCursorPosition().insertText(rtValue, m_ItemValueCharFormat);
 
     table->cellAt(2, 0).firstCursorPosition().insertText(i18n("Transit time:"), m_ItemNameCharFormat);
     table->cellAt(2, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(2, 1).firstCursorPosition().insertText(QString().sprintf("%02d:%02d", tt.hour(), tt.minute()),
                                                          m_ItemValueCharFormat);
 
     table->cellAt(3, 0).firstCursorPosition().insertText(i18n("Set time:"), m_ItemNameCharFormat);
     table->cellAt(3, 0).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(3, 1).firstCursorPosition().insertText(stValue, m_ItemValueCharFormat);
 
     table->cellAt(1, 2).firstCursorPosition().insertText(i18n("Azimuth at rise:"), m_ItemNameCharFormat);
     table->cellAt(1, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(1, 3).firstCursorPosition().insertText(azRValue, m_ItemValueCharFormat);
 
     table->cellAt(2, 2).firstCursorPosition().insertText(i18n("Altitude at transit:"), m_ItemNameCharFormat);
     table->cellAt(2, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(2, 3).firstCursorPosition().insertText(talt.toDMSString(), m_ItemValueCharFormat);
 
     table->cellAt(3, 2).firstCursorPosition().insertText(i18n("Azimuth at set:"), m_ItemNameCharFormat);
     table->cellAt(3, 2).firstCursorPosition().setBlockFormat(centered);
     table->cellAt(3, 3).firstCursorPosition().insertText(azSValue, m_ItemValueCharFormat);
 
     // Restore the position and other time-dependent parameters
     obj->recomputeCoords(ut, geo);
 }
 
 void DetailsTable::clearContents()
 {
     m_Document->clear();
 }
 
 void DetailsTable::setDefaultFormatting()
 {
     // Set default table format
     m_TableFormat.setAlignment(Qt::AlignCenter);
     m_TableFormat.setBorder(4);
     m_TableFormat.setCellPadding(2);
     m_TableFormat.setCellSpacing(2);
 
     // Set default table title character format
     m_TableTitleCharFormat.setFont(QFont("Times", 12, QFont::Bold));
     m_TableTitleCharFormat.setFontCapitalization(QFont::Capitalize);
 
     // Set default table item name character format
     m_ItemNameCharFormat.setFont(QFont("Times", 10, QFont::Bold));
 
     // Set default table item value character format
     m_ItemValueCharFormat.setFont(QFont("Times", 10));
 }
diff --git a/kstars/printing/foveditordialog.cpp b/kstars/printing/foveditordialog.cpp
index 4334734e9..9e0c3d17e 100644
--- a/kstars/printing/foveditordialog.cpp
+++ b/kstars/printing/foveditordialog.cpp
@@ -1,274 +1,274 @@
 /***************************************************************************
                           foveditordialog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Fri Aug 12 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "foveditordialog.h"
 
 #include "kstars.h"
 #include "printingwizard.h"
 
 #include <KJob>
 #include <KMessageBox>
 #include <KIO/StoredTransferJob>
 
 #include <QDebug>
 #include <QFileDialog>
 #include <QTemporaryFile>
 
 FovEditorDialogUI::FovEditorDialogUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
 
     setWindowTitle(i18n("Field of View Snapshot Browser"));
 }
 
 FovEditorDialog::FovEditorDialog(PrintingWizard *wizard, QWidget *parent)
     : QDialog(parent), m_ParentWizard(wizard), m_CurrentIndex(0)
 {
     m_EditorUi = new FovEditorDialogUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(m_EditorUi);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     setupWidgets();
     setupConnections();
 }
 
 void FovEditorDialog::slotNextFov()
 {
     slotSaveDescription();
 
     if (m_CurrentIndex < m_ParentWizard->getFovSnapshotList()->size() - 1)
     {
         m_CurrentIndex++;
 
         updateFovImage();
         updateButtons();
         updateDescriptions();
     }
 }
 
 void FovEditorDialog::slotPreviousFov()
 {
     slotSaveDescription();
 
     if (m_CurrentIndex > 0)
     {
         m_CurrentIndex--;
 
         updateFovImage();
         updateButtons();
         updateDescriptions();
     }
 }
 
 void FovEditorDialog::slotCaptureAgain()
 {
     hide();
     m_ParentWizard->recaptureFov(m_CurrentIndex);
 }
 
 void FovEditorDialog::slotDelete()
 {
     if (m_CurrentIndex > m_ParentWizard->getFovSnapshotList()->size() - 1)
     {
         return;
     }
 
     delete m_ParentWizard->getFovSnapshotList()->at(m_CurrentIndex);
     m_ParentWizard->getFovSnapshotList()->removeAt(m_CurrentIndex);
 
     if (m_CurrentIndex == m_ParentWizard->getFovSnapshotList()->size())
     {
         m_CurrentIndex--;
     }
 
     updateFovImage();
     updateButtons();
     updateDescriptions();
 }
 
 void FovEditorDialog::slotSaveDescription()
 {
     if (m_CurrentIndex < m_ParentWizard->getFovSnapshotList()->size())
     {
         m_ParentWizard->getFovSnapshotList()->at(m_CurrentIndex)->setDescription(m_EditorUi->descriptionEdit->text());
     }
 }
 
 void FovEditorDialog::slotSaveImage()
 {
     if (m_CurrentIndex >= m_ParentWizard->getFovSnapshotList()->size())
     {
         return;
     }
 
     //If the filename string contains no "/" separators, assume the
     //user wanted to place a file in their home directory.
     QString url = QFileDialog::getSaveFileUrl(KStars::Instance(), i18n("Save Image"), QUrl(QDir::homePath()),
                                               "image/png image/jpeg image/gif image/x-portable-pixmap image/bmp")
                       .url();
     QUrl fileUrl;
     if (!url.contains(QDir::separator()))
     {
         fileUrl = QUrl::fromLocalFile(QDir::homePath() + '/' + url);
     }
 
     else
     {
         fileUrl = QUrl::fromLocalFile(url);
     }
 
     QTemporaryFile tmpfile;
     tmpfile.open();
     QString fname;
 
     if (fileUrl.isValid())
     {
         if (fileUrl.isLocalFile())
         {
             fname = fileUrl.toLocalFile();
         }
 
         else
         {
             fname = tmpfile.fileName();
         }
 
         //Determine desired image format from filename extension
         QString ext = fname.mid(fname.lastIndexOf(".") + 1);
         // export as raster graphics
         const char *format = "PNG";
 
         if (ext.toLower() == "png")
         {
             format = "PNG";
         }
         else if (ext.toLower() == "jpg" || ext.toLower() == "jpeg")
         {
             format = "JPG";
         }
         else if (ext.toLower() == "gif")
         {
             format = "GIF";
         }
         else if (ext.toLower() == "pnm")
         {
             format = "PNM";
         }
         else if (ext.toLower() == "bmp")
         {
             format = "BMP";
         }
         else
         {
             qWarning() << i18n("Could not parse image format of %1; assuming PNG.", fname);
         }
 
         if (!m_ParentWizard->getFovSnapshotList()->at(m_CurrentIndex)->getPixmap().save(fname, format))
         {
             qDebug() << "Error: Unable to save image: " << fname;
         }
 
         else
         {
             qDebug() << "Image saved to file: " << fname;
         }
     }
 
     if (tmpfile.fileName() == fname)
     {
         //attempt to upload image to remote location
         KIO::TransferJob *uploadJob = KIO::storedHttpPost(&tmpfile, fileUrl);
         //if(!KIO::NetAccess::upload(tmpfile.fileName(), fileUrl, this))
         if (uploadJob->exec() == false)
         {
             QString message = i18n("Could not upload image to remote location: %1", fileUrl.url());
-            KMessageBox::sorry(0, message, i18n("Could not upload file"));
+            KMessageBox::sorry(nullptr, message, i18n("Could not upload file"));
         }
         uploadJob->kill();
     }
 }
 
 void FovEditorDialog::setupWidgets()
 {
     if (m_ParentWizard->getFovSnapshotList()->size() > 0)
     {
         m_EditorUi->imageLabel->setPixmap(m_ParentWizard->getFovSnapshotList()->first()->getPixmap());
     }
 
     updateButtons();
     updateDescriptions();
 }
 
 void FovEditorDialog::setupConnections()
 {
     connect(m_EditorUi->previousButton, SIGNAL(clicked()), this, SLOT(slotPreviousFov()));
     connect(m_EditorUi->nextButton, SIGNAL(clicked()), this, SLOT(slotNextFov()));
     connect(m_EditorUi->recaptureButton, SIGNAL(clicked()), this, SLOT(slotCaptureAgain()));
     connect(m_EditorUi->deleteButton, SIGNAL(clicked()), this, SLOT(slotDelete()));
     connect(m_EditorUi->descriptionEdit, SIGNAL(editingFinished()), this, SLOT(slotSaveDescription()));
     connect(m_EditorUi->saveButton, SIGNAL(clicked()), this, SLOT(slotSaveImage()));
 }
 
 void FovEditorDialog::updateButtons()
 {
     m_EditorUi->previousButton->setEnabled(m_CurrentIndex > 0);
     m_EditorUi->nextButton->setEnabled(m_CurrentIndex < m_ParentWizard->getFovSnapshotList()->size() - 1);
 }
 
 void FovEditorDialog::updateDescriptions()
 {
     if (m_ParentWizard->getFovSnapshotList()->size() == 0)
     {
         m_EditorUi->imageLabel->setText("No captured field of view images.");
         m_EditorUi->fovInfoLabel->setText(QString());
         m_EditorUi->recaptureButton->setEnabled(false);
         m_EditorUi->deleteButton->setEnabled(false);
         m_EditorUi->descriptionEdit->setEnabled(false);
         m_EditorUi->saveButton->setEnabled(false);
     }
 
     else
     {
         FOV *fov = m_ParentWizard->getFovSnapshotList()->at(m_CurrentIndex)->getFov();
 
         QString fovDescription = i18n("FOV (%1/%2): %3 (%4' x %5')", QString::number(m_CurrentIndex + 1),
                                       QString::number(m_ParentWizard->getFovSnapshotList()->size()), fov->name(),
                                       QString::number(fov->sizeX()), QString::number(fov->sizeY()));
 
         m_EditorUi->fovInfoLabel->setText(fovDescription);
 
         m_EditorUi->descriptionEdit->setText(
             m_ParentWizard->getFovSnapshotList()->at(m_CurrentIndex)->getDescription());
     }
 }
 
 void FovEditorDialog::updateFovImage()
 {
     if (m_CurrentIndex < m_ParentWizard->getFovSnapshotList()->size())
     {
         m_EditorUi->imageLabel->setPixmap(m_ParentWizard->getFovSnapshotList()->at(m_CurrentIndex)->getPixmap());
     }
 }
diff --git a/kstars/printing/foveditordialog.h b/kstars/printing/foveditordialog.h
index 641267e3f..19df20020 100644
--- a/kstars/printing/foveditordialog.h
+++ b/kstars/printing/foveditordialog.h
@@ -1,117 +1,117 @@
 /***************************************************************************
                           foveditordialog.h  -  K Desktop Planetarium
                              -------------------
     begin                : Fri Aug 12 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "ui_foveditordialog.h"
 
 #include <QDialog>
 #include <QFrame>
 
 class PrintingWizard;
 
 /**
  * \class FovEditorDialogUI
  * \brief User interface for FOV Editor Dialog.
  * \author Rafał Kułaga
  */
 class FovEditorDialogUI : public QFrame, public Ui::FovEditorDialog
 {
     Q_OBJECT
   public:
     /**
      * \brief Constructor.
      */
-    explicit FovEditorDialogUI(QWidget *parent = 0);
+    explicit FovEditorDialogUI(QWidget *parent = nullptr);
 };
 
 /**
  * \class FovEditorDialog
  * \brief Class representing FOV Editor Dialog which enables user to edit FOV snapshots.
  * \author Rafał Kułaga
  */
 class FovEditorDialog : public QDialog
 {
     Q_OBJECT
   public:
     /**
      * \brief Constructor.
      */
-    explicit FovEditorDialog(PrintingWizard *wizard, QWidget *parent = 0);
+    explicit FovEditorDialog(PrintingWizard *wizard, QWidget *parent = nullptr);
 
   private slots:
     /**
      * \brief Slot: switch to next FOV snapshot.
      */
     void slotNextFov();
 
     /**
      * \brief Slot: switch to previous FOV snapshot.
      */
     void slotPreviousFov();
 
     /**
      * \brief Slot: recapture current FOV snapshot.
      */
     void slotCaptureAgain();
 
     /**
      * \brief Slot: delete current FOV snapshot.
      */
     void slotDelete();
 
     /**
      * \brief Slot: save description of the current FOV snapshot.
      */
     void slotSaveDescription();
 
     /**
      * \brief Slot: open "Save file" dialog to choose file name and format to save image.
      */
     void slotSaveImage();
 
   private:
     /**
      * \brief Setup widget properties.
      */
     void setupWidgets();
 
     /**
      * \brief Setup signal-slot connections.
      */
     void setupConnections();
 
     /**
      * \brief Update buttons.
      */
     void updateButtons();
 
     /**
      * \brief Update image description.
      */
     void updateDescriptions();
 
     /**
      * \brief Update FOV image.
      */
     void updateFovImage();
 
     PrintingWizard *m_ParentWizard { nullptr };
     FovEditorDialogUI *m_EditorUi { nullptr };
 
     int m_CurrentIndex { 0 };
 };
diff --git a/kstars/printing/legend.cpp b/kstars/printing/legend.cpp
index 7180941b6..6accf24e6 100644
--- a/kstars/printing/legend.cpp
+++ b/kstars/printing/legend.cpp
@@ -1,596 +1,596 @@
 /***************************************************************************
                           legend.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Thu May 26 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "legend.h"
 
 #include "colorscheme.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "skyqpainter.h"
 #include "Options.h"
 
 #include <QBrush>
 
 namespace
 {
 const int symbolSize      = 15;
 const int bRectWidth      = 100;
 const int bRectHeight     = 45;
 const int maxHScalePixels = 200;
 const int maxVScalePixels = 100;
 const int xSymbolSpacing  = 100;
 const int ySymbolSpacing  = 70;
 }
 
 Legend::Legend(LEGEND_ORIENTATION orientation, LEGEND_POSITION pos)
     : m_SkyMap(SkyMap::Instance()), m_Orientation(orientation),
       m_Position(pos), m_PositionFloating(QPoint(0, 0)), m_cScheme(KStarsData::Instance()->colorScheme()),
       m_SymbolSize(symbolSize), m_BRectWidth(bRectWidth), m_BRectHeight(bRectHeight),
       m_MaxHScalePixels(maxHScalePixels), m_MaxVScalePixels(maxVScalePixels), m_XSymbolSpacing(xSymbolSpacing),
       m_YSymbolSpacing(ySymbolSpacing)
 {
     m_BgColor = m_cScheme->colorNamed("SkyColor");
 }
 
 Legend::~Legend()
 {
     if (m_Painter != nullptr && m_DeletePainter)
     {
         delete m_Painter;
     }
 }
 
 QSize Legend::calculateSize()
 {
     int width  = 0;
     int height = 0;
 
     switch (m_Orientation)
     {
         case LO_HORIZONTAL:
         {
             switch (m_Type)
             {
                 case LT_SCALE_ONLY:
                 {
                     width  = 40 + m_MaxHScalePixels;
                     height = 60;
                     break;
                 }
 
                 case LT_MAGNITUDES_ONLY:
                 {
                     width  = 140;
                     height = 70;
                     break;
                 }
 
                 case LT_SYMBOLS_ONLY:
                 {
                     width  = 7 * m_XSymbolSpacing;
                     height = 20 + m_SymbolSize + m_BRectHeight;
                     break;
                 }
 
                 case LT_SCALE_MAGNITUDES:
                 {
                     width  = 160 + m_MaxHScalePixels;
                     height = 70;
                     break;
                 }
 
                 case LT_FULL:
                 {
                     width  = 7 * m_XSymbolSpacing;
                     height = 20 + m_SymbolSize + m_BRectHeight + 70;
                     break;
                 }
 
                 default:
                     break; // should never happen
             }
         }
 
         break;
 
         case LO_VERTICAL:
         {
             switch (m_Type)
             {
                 case LT_SCALE_ONLY:
                 {
                     width  = 120;
                     height = 40 + m_MaxVScalePixels;
                     break;
                 }
 
                 case LT_MAGNITUDES_ONLY:
                 {
                     width  = 140;
                     height = 70;
                     break;
                 }
 
                 case LT_SYMBOLS_ONLY:
                 {
                     width  = 120;
                     height = 7 * m_YSymbolSpacing;
                     break;
                 }
 
                 case LT_SCALE_MAGNITUDES:
                 {
                     width  = 120;
                     height = 100 + m_MaxVScalePixels;
                     break;
                 }
 
                 case LT_FULL:
                 {
                     width  = 120;
                     height = 100 + 7 * m_YSymbolSpacing + m_MaxVScalePixels;
                     break;
                 }
 
                 default:
                     break; // should never happen
             }
 
             break;
         }
 
         default:
         {
             return QSize();
         }
     }
 
     return QSize(width, height);
 }
 
 void Legend::paintLegend(QPaintDevice *pd)
 {
     if (m_Painter)
     {
         delete m_Painter;
     }
 
     m_Painter       = new SkyQPainter(m_SkyMap, pd);
     m_DeletePainter = true;
     m_Painter->begin();
 
     paintLegend(m_Painter);
 
     m_Painter->end();
 }
 
 void Legend::paintLegend(SkyQPainter *painter)
 {
     if (!m_DeletePainter)
     {
         m_Painter = painter;
     }
 
     if (m_Position != LP_FLOATING)
     {
         m_PositionFloating = positionToDeviceCoord(painter->device());
     }
 
     m_Painter->translate(m_PositionFloating.x(), m_PositionFloating.y());
 
     m_Painter->setFont(m_Font);
 
     QBrush backgroundBrush(m_BgColor, Qt::SolidPattern);
     QPen backgroundPen(m_cScheme->colorNamed("SNameColor"));
     backgroundPen.setStyle(Qt::SolidLine);
 
     // set brush & pen
     m_Painter->setBrush(backgroundBrush);
     m_Painter->setPen(backgroundPen);
 
     QSize size = calculateSize();
     if (m_DrawFrame)
     {
         m_Painter->drawRect(1, 1, size.width(), size.height());
     }
 
     else
     {
         QPen noLinePen;
         noLinePen.setStyle(Qt::NoPen);
 
         m_Painter->setPen(noLinePen);
         m_Painter->drawRect(1, 1, size.width(), size.height());
 
         m_Painter->setPen(backgroundPen);
     }
 
     switch (m_Orientation)
     {
         case LO_HORIZONTAL:
         {
             switch (m_Type)
             {
                 case LT_SCALE_ONLY:
                 {
                     paintScale(QPointF(20, 20));
                     break;
                 }
 
                 case LT_MAGNITUDES_ONLY:
                 {
                     paintMagnitudes(QPointF(20, 20));
                     break;
                 }
 
                 case LT_SYMBOLS_ONLY:
                 {
                     paintSymbols(QPointF(20, 20));
                     break;
                 }
 
                 case LT_SCALE_MAGNITUDES:
                 {
                     paintMagnitudes(QPointF(20, 20));
                     paintScale(QPointF(150, 20));
                     break;
                 }
 
                 case LT_FULL:
                 {
                     paintSymbols(QPointF(20, 20));
                     paintMagnitudes(QPointF(10, 40 + m_SymbolSize + m_BRectHeight));
                     paintScale(QPointF(200, 40 + m_SymbolSize + m_BRectHeight));
                     break;
                 }
 
                 default:
                     break; // should never happen
             }
 
             break;
         }
 
         case LO_VERTICAL:
         {
             switch (m_Type)
             {
                 case LT_SCALE_ONLY:
                 {
                     paintScale(QPointF(20, 20));
                     break;
                 }
 
                 case LT_MAGNITUDES_ONLY:
                 {
                     paintMagnitudes(QPointF(20, 20));
                     break;
                 }
 
                 case LT_SYMBOLS_ONLY:
                 {
                     paintSymbols(QPointF(20, 20));
                     break;
                 }
 
                 case LT_SCALE_MAGNITUDES:
                 {
                     paintMagnitudes(QPointF(7, 20));
                     paintScale(QPointF(20, 80));
                     break;
                 }
 
                 case LT_FULL:
                 {
                     paintSymbols(QPointF(30, 20));
                     paintMagnitudes(QPointF(7, 30 + 7 * m_YSymbolSpacing));
                     paintScale(QPointF(20, 90 + 7 * m_YSymbolSpacing));
                     break;
                 }
 
                 default:
                     break; // should never happen
             }
 
             break;
         }
 
         default:
             break; // should never happen
     }
 }
 
 void Legend::paintLegend(QPaintDevice *pd, LEGEND_TYPE type, LEGEND_POSITION pos)
 {
     LEGEND_TYPE prevType    = m_Type;
     LEGEND_POSITION prevPos = m_Position;
 
     m_Type     = type;
     m_Position = pos;
 
     paintLegend(pd);
 
     m_Type     = prevType;
     m_Position = prevPos;
 }
 
 void Legend::paintLegend(SkyQPainter *painter, LEGEND_TYPE type, LEGEND_POSITION pos)
 {
     LEGEND_TYPE prevType    = m_Type;
     LEGEND_POSITION prevPos = m_Position;
 
     m_Type     = type;
     m_Position = pos;
 
     paintLegend(painter);
 
     m_Type     = prevType;
     m_Position = prevPos;
 }
 
 void Legend::paintSymbols(QPointF pos)
 {
     qreal x = pos.x();
     qreal y = pos.y();
 
     x += 30;
 
     switch (m_Orientation)
     {
         case Legend::LO_HORIZONTAL:
         {
             // paint Open Cluster/Asterism symbol
             QString label1 = i18n("Open Cluster") + '\n' + i18n("Asterism");
             paintSymbol(QPointF(x, y), 3, 1, 0, label1);
             x += m_XSymbolSpacing;
 
             // paint Globular Cluster symbol
             paintSymbol(QPointF(x, y), 4, 1, 0, i18n("Globular Cluster"));
             x += m_XSymbolSpacing;
 
             // paint Gaseous Nebula/Dark Nebula symbol
             QString label3 = i18n("Gaseous Nebula") + '\n' + i18n("Dark Nebula");
             paintSymbol(QPointF(x, y), 5, 1, 0, label3);
             x += m_XSymbolSpacing;
 
             // paint Planetary Nebula symbol
             paintSymbol(QPointF(x, y), 6, 1, 0, i18n("Planetary Nebula"));
             x += m_XSymbolSpacing;
 
             // paint Supernova Remnant
             paintSymbol(QPointF(x, y), 7, 1, 0, i18n("Supernova Remnant"));
             x += m_XSymbolSpacing;
 
             // paint Galaxy/Quasar
             QString label6 = i18n("Galaxy") + '\n' + i18n("Quasar");
             paintSymbol(QPointF(x, y), 8, 0.5, 60, label6);
             x += m_XSymbolSpacing;
 
             // paint Galaxy Cluster
             paintSymbol(QPointF(x, y), 14, 1, 0, i18n("Galactic Cluster"));
 
             break;
         }
 
         case Legend::LO_VERTICAL:
         {
             // paint Open Cluster/Asterism symbol
             QString label1 = i18n("Open Cluster") + '\n' + i18n("Asterism");
             paintSymbol(QPointF(x, y), 3, 1, 0, label1);
             y += m_YSymbolSpacing;
 
             // paint Globular Cluster symbol
             paintSymbol(QPointF(x, y), 4, 1, 0, i18n("Globular Cluster"));
             y += m_YSymbolSpacing;
 
             // paint Gaseous Nebula/Dark Nebula symbol
             QString label3 = i18n("Gaseous Nebula") + '\n' + i18n("Dark Nebula");
             paintSymbol(QPointF(x, y), 5, 1, 0, label3);
             y += m_YSymbolSpacing;
 
             // paint Planetary Nebula symbol
             paintSymbol(QPointF(x, y), 6, 1, 0, i18n("Planetary Nebula"));
             y += m_YSymbolSpacing;
 
             // paint Supernova Remnant
             paintSymbol(QPointF(x, y), 7, 1, 0, i18n("Supernova Remnant"));
             y += m_YSymbolSpacing;
 
             // paint Galaxy/Quasar
             QString label6 = i18n("Galaxy") + '\n' + i18n("Quasar");
             paintSymbol(QPointF(x, y), 8, 0.5, 60, label6);
             y += m_YSymbolSpacing;
 
             // paint Galaxy Cluster
             paintSymbol(QPointF(x, y), 14, 1, 0, i18n("Galactic Cluster"));
 
             break;
         }
         default:
             return; // should never happen
     }
 }
 
 void Legend::paintSymbol(QPointF pos, int type, float e, float angle, QString label)
 {
     qreal x              = pos.x();
     qreal y              = pos.y();
     qreal bRectHalfWidth = (qreal)m_BRectWidth / 2;
 
     // paint symbol
     m_Painter->drawDeepSkySymbol(pos, type, m_SymbolSize, e, angle);
     QRectF bRect(QPoint(x - bRectHalfWidth, y + m_SymbolSize),
                  QPoint(x + bRectHalfWidth, y + m_SymbolSize + m_BRectHeight));
     //m_Painter->drawRect(bRect);
     // paint label
     m_Painter->drawText(bRect, label, QTextOption(Qt::AlignHCenter));
 }
 
 void Legend::paintMagnitudes(QPointF pos)
 {
     qreal x = pos.x();
     qreal y = pos.y();
 
     m_Painter->drawText(x, y, i18n("Star Magnitudes:"));
     y += 15;
 
     for (int i = 1; i <= 9; i += 2)
     {
         m_Painter->drawPointSource(QPointF(x + i * 10, y), m_Painter->starWidth(i));
         m_Painter->drawText(x + i * 10 - 4, y + 20, QString::number(i));
     }
 }
 
 void Legend::paintScale(QPointF pos)
 {
     qreal maxScalePixels;
 
     switch (m_Orientation)
     {
         case LO_HORIZONTAL:
         {
             maxScalePixels = m_MaxHScalePixels;
             break;
         }
 
         case LO_VERTICAL:
         {
             maxScalePixels = m_MaxVScalePixels;
             break;
         }
 
         default:
             return; // should never happen
     }
 
     qreal maxArcsec = maxScalePixels * 57.3 * 3600 / Options::zoomFactor();
 
     int deg    = 0;
     int arcmin = 0;
     int arcsec = 0;
 
     QString lab;
     if (maxArcsec >= 3600)
     {
         deg = maxArcsec / 3600;
         lab = QString::number(deg) + QString::fromWCharArray(L"\u00B0");
     }
 
     else if (maxArcsec >= 60)
     {
         arcmin = maxArcsec / 60;
         lab    = QString::number(arcmin) + '\'';
     }
 
     else
     {
         arcsec = maxArcsec;
         lab    = QString::number(arcsec) + "\"";
     }
 
     int actualArcsec = 3600 * deg + 60 * arcmin + arcsec;
 
     qreal size = actualArcsec * Options::zoomFactor() / 57.3 / 3600;
 
     qreal x = pos.x();
     qreal y = pos.y();
 
     switch (m_Orientation)
     {
         case LO_HORIZONTAL:
         {
             m_Painter->drawText(pos, i18n("Chart Scale:"));
             y += 15;
 
             m_Painter->drawLine(x, y, x + size, y);
             // paint line endings
             m_Painter->drawLine(x, y - 5, x, y + 5);
             m_Painter->drawLine(x + size, y - 5, x + size, y + 5);
 
             // paint scale text
             QRectF bRect(QPoint(x, y), QPoint(x + size, y + 20));
             m_Painter->drawText(bRect, lab, QTextOption(Qt::AlignHCenter));
 
             break;
         }
 
         case LO_VERTICAL:
         {
             m_Painter->drawText(pos, i18n("Chart Scale:"));
             y += 10;
             x += 40;
 
             m_Painter->drawLine(x, y, x, y + size);
             // paint line endings
             m_Painter->drawLine(x - 5, y, x + 5, y);
             m_Painter->drawLine(x - 5, y + size, x + 5, y + size);
 
             // paint scale text
             QRectF bRect(QPoint(x + 5, y), QPoint(x + 20, y + size));
             //m_Painter->drawRect(bRect);
             m_Painter->drawText(bRect, lab, QTextOption(Qt::AlignVCenter));
 
             break;
         }
 
         default:
             return; // should never happen
     }
 }
 
 QPoint Legend::positionToDeviceCoord(QPaintDevice *pd)
 {
     QSize legendSize = calculateSize();
 
     switch (m_Position)
     {
         case LP_UPPER_LEFT: // position: upper left corner
         {
             return QPoint(0, 0);
         }
 
         case LP_UPPER_RIGHT: // position: upper right corner
         {
             return QPoint(pd->width() - legendSize.width(), 0);
         }
 
         case LP_LOWER_LEFT: // position: lower left corner
         {
             return QPoint(0, pd->height() - legendSize.height());
         }
 
         case LP_LOWER_RIGHT: // position: lower right corner
         {
             return QPoint(pd->width() - legendSize.width(), pd->height() - legendSize.height());
         }
 
         default: // legend is floating
         {
             return QPoint();
         }
     }
 }
 
 Legend::Legend(const Legend &o)
-    : m_Painter(0), m_SkyMap(o.m_SkyMap), m_DeletePainter(o.m_DeletePainter), m_Type(o.m_Type),
+    : m_Painter(nullptr), m_SkyMap(o.m_SkyMap), m_DeletePainter(o.m_DeletePainter), m_Type(o.m_Type),
       m_Orientation(o.m_Orientation), m_Position(o.m_Position), m_PositionFloating(o.m_PositionFloating),
       m_cScheme(o.m_cScheme), m_Font(o.m_Font), m_BgColor(o.m_BgColor), m_DrawFrame(o.m_DrawFrame),
       m_SymbolSize(o.m_SymbolSize), m_BRectWidth(o.m_BRectWidth), m_BRectHeight(o.m_BRectHeight),
       m_MaxHScalePixels(o.m_MaxHScalePixels), m_MaxVScalePixels(o.m_MaxVScalePixels),
       m_XSymbolSpacing(o.m_XSymbolSpacing), m_YSymbolSpacing(o.m_YSymbolSpacing)
 {
 }
diff --git a/kstars/printing/printingwizard.cpp b/kstars/printing/printingwizard.cpp
index 2ce7118b4..7902d67f7 100644
--- a/kstars/printing/printingwizard.cpp
+++ b/kstars/printing/printingwizard.cpp
@@ -1,601 +1,601 @@
 /***************************************************************************
                           printingwizard.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Tue Aug 2 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "printingwizard.h"
 
 #include <QStackedWidget>
 #include <QtPrintSupport/QPrinter>
 #include <QStandardPaths>
 
 #include "finderchart.h"
 #include "loggingform.h"
 #include "detailstable.h"
 #include "pwizobjectselection.h"
 #include "pwizchartconfig.h"
 #include "pwizfovbrowse.h"
 #include "pwizfovconfig.h"
 #include "pwizfovtypeselection.h"
 #include "pwizfovmanual.h"
 #include "pwizfovsh.h"
 #include "pwizchartcontents.h"
 #include "pwizprint.h"
 #include "projections/projector.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "legend.h"
 #include "shfovexporter.h"
 #include "Options.h"
 #include "kspaths.h"
 
 PWizWelcomeUI::PWizWelcomeUI(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 }
 
 PrintingWizard::PrintingWizard(QWidget *parent)
-    : QDialog(parent), m_KStars(KStars::Instance()), m_FinderChart(0), m_SkyObject(0), m_FovType(FT_UNDEFINED),
-      m_FovImageSize(QSize(500, 500)), m_ShBeginObject(0), m_PointingShBegin(false), m_SwitchColors(false),
+    : QDialog(parent), m_KStars(KStars::Instance()), m_FinderChart(nullptr), m_SkyObject(nullptr), m_FovType(FT_UNDEFINED),
+      m_FovImageSize(QSize(500, 500)), m_ShBeginObject(nullptr), m_PointingShBegin(false), m_SwitchColors(false),
       m_RecapturingFov(false), m_RecaptureIdx(-1)
 {
     m_Printer = new QPrinter(QPrinter::ScreenResolution);
 
     setupWidgets();
 }
 
 PrintingWizard::~PrintingWizard()
 {
     // Clean up
     if (m_Printer)
     {
         delete m_Printer;
     }
     if (m_FinderChart)
     {
         delete m_FinderChart;
     }
 
     qDeleteAll(m_FovSnapshots);
 }
 
 void PrintingWizard::updateStepButtons()
 {
     switch (m_WizardStack->currentIndex())
     {
         case PW_OBJECT_SELECTION: // object selection
         {
             nextB->setEnabled(m_SkyObject != nullptr);
             break;
         }
     }
 }
 
 void PrintingWizard::beginPointing()
 {
     // If there is sky object already selected, center sky map around it
     if (m_SkyObject)
     {
         m_KStars->map()->setClickedObject(m_SkyObject);
         m_KStars->map()->slotCenter();
     }
 
     m_KStars->map()->setObjectPointingMode(true);
     hide();
 }
 
 void PrintingWizard::beginShBeginPointing()
 {
     m_PointingShBegin = true;
 
     if (m_ShBeginObject)
     {
         m_KStars->map()->setClickedObject(m_SkyObject);
         m_KStars->map()->slotCenter();
     }
 
     m_KStars->map()->setObjectPointingMode(true);
     hide();
 }
 
 void PrintingWizard::pointingDone(SkyObject *obj)
 {
     if (m_PointingShBegin)
     {
         m_ShBeginObject = obj;
         m_WizFovShUI->setBeginObject(obj);
         m_PointingShBegin = false;
     }
     else
     {
         m_SkyObject = obj;
         m_WizObjectSelectionUI->setSkyObject(obj);
     }
 
     show();
 }
 
 void PrintingWizard::beginFovCapture()
 {
     if (m_SkyObject)
     {
         slewAndBeginCapture(m_SkyObject);
     }
 }
 
 void PrintingWizard::beginFovCapture(SkyPoint *center, FOV *fov)
 {
     slewAndBeginCapture(center, fov);
 }
 
 void PrintingWizard::captureFov()
 {
     if (m_KStars->data()->getVisibleFOVs().isEmpty())
     {
         return;
     }
 
     QPixmap pixmap(m_FovImageSize);
     m_SimpleFovExporter.exportFov(m_KStars->data()->getVisibleFOVs().first(), &pixmap);
     if (m_WizFovConfigUI->isLegendEnabled())
     {
         // Set legend position, orientation and type
         Legend legend(m_WizFovConfigUI->getLegendOrientation(), m_WizFovConfigUI->getLegendPosition());
         legend.setType(m_WizFovConfigUI->getLegendType());
 
         // Check if alpha blending is enabled
         if (m_WizFovConfigUI->isAlphaBlendingEnabled())
         {
             QColor bgColor = legend.getBgColor();
             bgColor.setAlpha(200);
             legend.setBgColor(bgColor);
         }
 
         // Paint legend
         legend.paintLegend(&pixmap);
     }
     FovSnapshot *snapshot = new FovSnapshot(pixmap, QString(), m_KStars->data()->getVisibleFOVs().first(),
                                             m_KStars->map()->getCenterPoint());
 
     if (m_RecapturingFov)
     {
         delete m_FovSnapshots.at(m_RecaptureIdx);
         m_FovSnapshots.replace(m_RecaptureIdx, snapshot);
         m_KStars->map()->setFovCaptureMode(false);
         m_RecapturingFov = false;
         m_RecaptureIdx   = -1;
         fovCaptureDone();
     }
     else
     {
         m_FovSnapshots.append(snapshot);
     }
 }
 
 void PrintingWizard::fovCaptureDone()
 {
     //Restore old color scheme if necessary
     //(if printing was aborted, the ColorScheme is still restored)
     if (m_SwitchColors)
     {
         m_KStars->loadColorScheme(m_PrevSchemeName);
         m_KStars->map()->forceUpdate();
     }
 
     if (m_RecapturingFov)
     {
         m_RecapturingFov = false;
         m_RecaptureIdx   = -1;
     }
 
     show();
 }
 
 void PrintingWizard::beginShFovCapture()
 {
     if (!m_ShBeginObject)
     {
         return;
     }
 
     ShFovExporter exporter(this, KStars::Instance()->map());
 
     // Get selected FOV symbol
     double fovArcmin(0);
     foreach (FOV *fov, KStarsData::Instance()->getAvailableFOVs())
     {
         if (fov->name() == m_WizFovShUI->getFovName())
         {
             fovArcmin = qMin(fov->sizeX(), fov->sizeY());
             break;
         }
     }
 
     // Calculate path and check if it's not empty
     if (!exporter.calculatePath(*m_SkyObject, *m_ShBeginObject, fovArcmin / 60, m_WizFovShUI->getMaglim()))
     {
         KMessageBox::information(this,
                                  i18n("Star hopper returned empty path. We advise you to change star hopping settings "
                                       "or use manual capture mode."),
                                  i18n("Star hopper failed to find path"));
         return;
     }
 
     // If FOV shape should be overridden, do this now
     m_SimpleFovExporter.setFovShapeOverriden(m_WizFovConfigUI->isFovShapeOverriden());
     m_SimpleFovExporter.setFovSymbolDrawn(m_WizFovConfigUI->isFovShapeOverriden());
 
     // If color scheme should be switched, save previous scheme name and switch to "sky chart" color scheme
     m_SwitchColors   = m_WizFovConfigUI->isSwitchColorsEnabled();
     m_PrevSchemeName = m_KStars->data()->colorScheme()->fileName();
     if (m_SwitchColors)
     {
         m_KStars->loadColorScheme("chart.colors");
     }
 
     // Save previous FOV symbol names and switch to symbol selected by user
     QStringList prevFovNames = Options::fOVNames();
     Options::setFOVNames(QStringList(m_WizFovShUI->getFovName()));
     KStarsData::Instance()->syncFOV();
     if (KStarsData::Instance()->getVisibleFOVs().isEmpty())
     {
         return;
     }
 
     // Hide Printing Wizard
     hide();
 
     // Draw and export path
     exporter.exportPath();
 
     // Restore old color scheme if necessary
     if (m_SwitchColors)
     {
         m_KStars->loadColorScheme(m_PrevSchemeName);
         m_KStars->map()->forceUpdate();
     }
 
     // Update skymap
     m_KStars->map()->forceUpdate(true);
 
     // Restore previous FOV symbol names
     Options::setFOVNames(prevFovNames);
     KStarsData::Instance()->syncFOV();
 
     //FIXME: this is _dirty_ workaround to get PrintingWizard displayed in its previous position.
     QTimer::singleShot(50, this, SLOT(show()));
 }
 
 void PrintingWizard::recaptureFov(int idx)
 {
     // Set recapturing flag and index of the FOV snapshot to replace
     m_RecapturingFov = true;
     m_RecaptureIdx   = idx;
 
     // Begin FOV snapshot capture
     SkyPoint p = m_FovSnapshots.at(m_RecaptureIdx)->getCentralPoint();
     slewAndBeginCapture(&p, m_FovSnapshots.at(m_RecaptureIdx)->getFov());
 }
 
 void PrintingWizard::slotPrevPage()
 {
     int currentIdx = m_WizardStack->currentIndex();
     switch (currentIdx)
     {
         case PW_FOV_BROWSE:
         {
             switch (m_FovType)
             {
                 case FT_MANUAL:
                 {
                     m_WizardStack->setCurrentIndex(PW_FOV_MANUAL);
                     break;
                 }
 
                 case FT_STARHOPPER:
                 {
                     m_WizardStack->setCurrentIndex(PW_FOV_SH);
                     break;
                 }
 
                 default:
                 {
                     return;
                 }
             }
 
             break;
         }
 
         case PW_FOV_SH:
         {
             m_WizardStack->setCurrentIndex(PW_FOV_CONFIG);
             break;
         }
 
         default:
         {
             m_WizardStack->setCurrentIndex(currentIdx - 1);
             break;
         }
     }
 
     updateStepButtons();
     updateButtons();
 }
 
 void PrintingWizard::slotNextPage()
 {
     int currentIdx = m_WizardStack->currentIndex();
     switch (currentIdx)
     {
         case PW_FOV_TYPE:
         {
             m_FovType = m_WizFovTypeSelectionUI->getFovExportType();
             m_WizardStack->setCurrentIndex(PW_FOV_CONFIG);
             break;
         }
 
         case PW_FOV_CONFIG:
         {
             switch (m_FovType)
             {
                 case FT_MANUAL:
                 {
                     m_WizardStack->setCurrentIndex(PW_FOV_MANUAL);
                     break;
                 }
 
                 case FT_STARHOPPER:
                 {
                     m_WizardStack->setCurrentIndex(PW_FOV_SH);
                     break;
                 }
 
                 default: // Undefined FOV type - do nothing
                 {
                     return;
                 }
             }
 
             break;
         }
 
         case PW_FOV_MANUAL:
         {
             m_WizardStack->setCurrentIndex(PW_FOV_BROWSE);
             break;
         }
 
         case PW_FOV_BROWSE:
         {
             m_WizChartContentsUI->entered();
             m_WizardStack->setCurrentIndex(PW_CHART_CONTENTS);
             break;
         }
 
         case PW_CHART_CONTENTS:
         {
             createFinderChart();
             m_WizardStack->setCurrentIndex(PW_CHART_PRINT);
             break;
         }
 
         default:
         {
             m_WizardStack->setCurrentIndex(currentIdx + 1);
         }
     }
 
     updateButtons();
     updateStepButtons();
 }
 
 void PrintingWizard::setupWidgets()
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     m_WizardStack = new QStackedWidget(this);
 
     setWindowTitle(i18n("Printing Wizard"));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(m_WizardStack);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     nextB = new QPushButton(i18n("&Next >"));
     nextB->setToolTip(i18n("Go to next Wizard page"));
     nextB->setDefault(true);
     backB = new QPushButton(i18n("< &Back"));
     backB->setToolTip(i18n("Go to previous Wizard page"));
     backB->setEnabled(false);
 
     buttonBox->addButton(backB, QDialogButtonBox::ActionRole);
     buttonBox->addButton(nextB, QDialogButtonBox::ActionRole);
 
     connect(nextB, SIGNAL(clicked()), this, SLOT(slotNextPage()));
     connect(backB, SIGNAL(clicked()), this, SLOT(slotPrevPage()));
 
     // Create step widgets
     m_WizWelcomeUI          = new PWizWelcomeUI(m_WizardStack);
     m_WizObjectSelectionUI  = new PWizObjectSelectionUI(this, m_WizardStack);
     m_WizChartConfigUI      = new PWizChartConfigUI(this);
     m_WizFovTypeSelectionUI = new PWizFovTypeSelectionUI(this, m_WizardStack);
     m_WizFovConfigUI        = new PWizFovConfigUI(m_WizardStack);
     m_WizFovManualUI        = new PWizFovManualUI(this, m_WizardStack);
     m_WizFovShUI            = new PWizFovShUI(this, m_WizardStack);
     m_WizFovBrowseUI        = new PWizFovBrowseUI(this, m_WizardStack);
     m_WizChartContentsUI    = new PWizChartContentsUI(this, m_WizardStack);
     m_WizPrintUI            = new PWizPrintUI(this, m_WizardStack);
 
     // Add step widgets to m_WizardStack
     m_WizardStack->addWidget(m_WizWelcomeUI);
     m_WizardStack->addWidget(m_WizObjectSelectionUI);
     m_WizardStack->addWidget(m_WizChartConfigUI);
     m_WizardStack->addWidget(m_WizFovTypeSelectionUI);
     m_WizardStack->addWidget(m_WizFovConfigUI);
     m_WizardStack->addWidget(m_WizFovManualUI);
     m_WizardStack->addWidget(m_WizFovShUI);
     m_WizardStack->addWidget(m_WizFovBrowseUI);
     m_WizardStack->addWidget(m_WizChartContentsUI);
     m_WizardStack->addWidget(m_WizPrintUI);
 
     // Set banner images for steps
     QPixmap bannerImg;
     if (bannerImg.load(KSPaths::locate(QStandardPaths::GenericDataLocation, "wzstars.png")))
     {
         m_WizWelcomeUI->banner->setPixmap(bannerImg);
         m_WizObjectSelectionUI->banner->setPixmap(bannerImg);
         m_WizChartConfigUI->banner->setPixmap(bannerImg);
         m_WizFovTypeSelectionUI->banner->setPixmap(bannerImg);
         m_WizFovConfigUI->banner->setPixmap(bannerImg);
         m_WizFovManualUI->banner->setPixmap(bannerImg);
         m_WizFovShUI->banner->setPixmap(bannerImg);
         m_WizFovBrowseUI->banner->setPixmap(bannerImg);
         m_WizChartContentsUI->banner->setPixmap(bannerImg);
         m_WizPrintUI->banner->setPixmap(bannerImg);
     }
 
     backB->setEnabled(false);
 }
 
 void PrintingWizard::updateButtons()
 {
     nextB->setEnabled(m_WizardStack->currentIndex() < m_WizardStack->count() - 1);
     backB->setEnabled(m_WizardStack->currentIndex() > 0);
 }
 
 void PrintingWizard::slewAndBeginCapture(SkyPoint *center, FOV *fov)
 {
     if (!center)
     {
         return;
     }
 
     // If pointer to FOV is passed...
     if (fov)
     {
         // Switch to appropriate FOV symbol
         Options::setFOVNames(QStringList(fov->name()));
         m_KStars->data()->syncFOV();
 
         // Adjust map's zoom level
         double zoom = m_FovImageSize.width() > m_FovImageSize.height() ?
                           SimpleFovExporter::calculateZoomLevel(m_FovImageSize.width(), fov->sizeX()) :
                           SimpleFovExporter::calculateZoomLevel(m_FovImageSize.height(), fov->sizeY());
         m_KStars->map()->setZoomFactor(zoom);
     }
 
     m_SimpleFovExporter.setFovShapeOverriden(m_WizFovConfigUI->isFovShapeOverriden());
     m_SimpleFovExporter.setFovSymbolDrawn(m_WizFovConfigUI->isFovShapeOverriden());
 
     m_SwitchColors   = m_WizFovConfigUI->isSwitchColorsEnabled();
     m_PrevSchemeName = m_KStars->data()->colorScheme()->fileName();
     if (m_SwitchColors)
     {
         m_KStars->loadColorScheme("chart.colors");
     }
 
     m_KStars->hideAllFovExceptFirst();
     m_KStars->map()->setClickedPoint(center);
     m_KStars->map()->slotCenter();
     m_KStars->map()->setFovCaptureMode(true);
     hide();
 }
 
 void PrintingWizard::createFinderChart()
 {
     // Delete old (if needed) and create new FinderChart
     if (m_FinderChart)
     {
         delete m_FinderChart;
     }
     m_FinderChart = new FinderChart;
 
     // Insert title and subtitle
     m_FinderChart->insertTitleSubtitle(m_WizChartConfigUI->titleEdit->text(), m_WizChartConfigUI->subtitleEdit->text());
 
     // Insert description
     if (!m_WizChartConfigUI->descriptionTextEdit->toPlainText().isEmpty())
     {
         m_FinderChart->insertDescription(m_WizChartConfigUI->descriptionTextEdit->toPlainText());
     }
 
     // Insert simple finder chart logging form
     if (m_WizChartContentsUI->isLoggingFormChecked())
     {
         LoggingForm chartLogger;
         chartLogger.createFinderChartLogger();
         m_FinderChart->insertSectionTitle(i18n("Logging Form"));
         m_FinderChart->insertLoggingForm(&chartLogger);
     }
 
     m_FinderChart->insertSectionTitle(i18n("Field of View Snapshots"));
 
     // Insert FOV images and descriptions
     for (int i = 0; i < m_FovSnapshots.size(); i++)
     {
         FOV *fov = m_FovSnapshots.at(i)->getFov();
         QString fovDescription =
             i18nc("%1 = FOV index, %2 = FOV count, %3 = FOV name, %4 = FOV X size, %5 = FOV Y size",
                   "FOV (%1/%2): %3 (%4' x %5')", QString::number(i + 1), QString::number(m_FovSnapshots.size()),
                   fov->name(), QString::number(fov->sizeX()), QString::number(fov->sizeY())) +
             "\n";
         m_FinderChart->insertImage(m_FovSnapshots.at(i)->getPixmap().toImage(),
                                    fovDescription + m_FovSnapshots.at(i)->getDescription(), true);
     }
 
     if (m_WizChartContentsUI->isGeneralTableChecked() || m_WizChartContentsUI->isPositionTableChecked() ||
         m_WizChartContentsUI->isRSTTableChecked() || m_WizChartContentsUI->isAstComTableChecked())
     {
         m_FinderChart->insertSectionTitle(i18n("Details About Object"));
         m_FinderChart->insertGeoTimeInfo(KStarsData::Instance()->ut(), KStarsData::Instance()->geo());
     }
 
     // Insert details table : general
     DetailsTable detTable;
     if (m_WizChartContentsUI->isGeneralTableChecked())
     {
         detTable.createGeneralTable(m_SkyObject);
         m_FinderChart->insertDetailsTable(&detTable);
     }
 
     // Insert details table : position
     if (m_WizChartContentsUI->isPositionTableChecked())
     {
         detTable.createCoordinatesTable(m_SkyObject, m_KStars->data()->ut(), m_KStars->data()->geo());
         m_FinderChart->insertDetailsTable(&detTable);
     }
 
     // Insert details table : RST
     if (m_WizChartContentsUI->isRSTTableChecked())
     {
         detTable.createRSTTAble(m_SkyObject, m_KStars->data()->ut(), m_KStars->data()->geo());
         m_FinderChart->insertDetailsTable(&detTable);
     }
 
     // Insert details table : Asteroid/Comet
     if (m_WizChartContentsUI->isAstComTableChecked())
     {
         detTable.createAsteroidCometTable(m_SkyObject);
         m_FinderChart->insertDetailsTable(&detTable);
     }
 }
diff --git a/kstars/printing/printingwizard.h b/kstars/printing/printingwizard.h
index 913b1338e..c872f8c69 100644
--- a/kstars/printing/printingwizard.h
+++ b/kstars/printing/printingwizard.h
@@ -1,287 +1,287 @@
 /***************************************************************************
                           printingwizard.h  -  K Desktop Planetarium
                              -------------------
     begin                : Tue Aug 2 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PRINTINGWIZARD_H
 #define PRINTINGWIZARD_H
 
 #include "ui_pwizwelcome.h"
 
 #include "QDialog"
 #include "simplefovexporter.h"
 #include "fovsnapshot.h"
 #include "QSize"
 
 class KStars;
 class PWizObjectSelectionUI;
 class PWizFovBrowseUI;
 class PWizFovTypeSelectionUI;
 class PWizFovConfigUI;
 class PWizFovManualUI;
 class PWizFovShUI;
 class PWizChartConfigUI;
 class PWizChartContentsUI;
 class PWizPrintUI;
 class FinderChart;
 class SkyObject;
 class QStackedWidget;
 class QPrinter;
 
 /**
   * \class PWizWelcomeUI
   * \brief User interface for the first step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizWelcomeUI : public QFrame, public Ui::PWizWelcome
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizWelcomeUI(QWidget *parent = 0);
+    explicit PWizWelcomeUI(QWidget *parent = nullptr);
 };
 
 /**
   * \class PrintingWizard
   * \brief Class representing Printing Wizard for KStars printed documents (currently only finder charts).
   * \author Rafał Kułaga
   */
 class PrintingWizard : public QDialog
 {
     Q_OBJECT
   public:
     /**
           * \brief Wizard steps enumeration.
           */
     enum WIZARD_STEPS
     {
         PW_WELCOME          = 0,
         PW_OBJECT_SELECTION = 1,
         PW_CHART_CONFIG     = 2,
         PW_FOV_TYPE         = 3,
         PW_FOV_CONFIG       = 4,
         PW_FOV_MANUAL       = 5,
         PW_FOV_SH           = 6,
         PW_FOV_BROWSE       = 7,
         PW_CHART_CONTENTS   = 8,
         PW_CHART_PRINT      = 9
     };
 
     /**
           * \brief FOV export method type enumeration.
           */
     enum FOV_TYPE
     {
         FT_MANUAL,
         FT_STARHOPPER,
         FT_UNDEFINED
     };
 
     /**
           * \brief Constructor.
           */
-    explicit PrintingWizard(QWidget *parent = 0);
+    explicit PrintingWizard(QWidget *parent = nullptr);
 
     /**
           * \brief Destructor.
           */
     ~PrintingWizard() override;
 
     /**
           * \brief Get used FOV export method.
           * \return Selected FOV export method.
           */
     FOV_TYPE getFovType() { return m_FovType; }
 
     /**
           * \brief Get printer used by Printing Wizard.
           * \return Used printer.
           */
     QPrinter *getPrinter() { return m_Printer; }
 
     /**
           * \brief Get used FinderChart document.
           * \return Used FinderChart document.
           */
     FinderChart *getFinderChart() { return m_FinderChart; }
 
     /**
           * \brief Get selected SkyObject, for which FinderChart is created.
           * \return Selected SkyObject.
           */
     SkyObject *getSkyObject() { return m_SkyObject; }
 
     /**
           * \brief Get FovSnapshot list.
           * \return Used FovSnapshot list.
           */
     QList<FovSnapshot *> *getFovSnapshotList() { return &m_FovSnapshots; }
 
     /**
           * \brief Get FOV snapshot image size.
           * \return Size of the FOV snapshot image.
           */
     QSize getFovImageSize() { return m_FovImageSize; }
 
     /**
           * \brief Get pointer to the SimpleFovExporter class instance.
           * \return Pointer to the SimpleFovExporter instance used by Printing Wizard.
           */
     SimpleFovExporter *getFovExporter() { return &m_SimpleFovExporter; }
 
     /**
           * \brief Get object at which star hopping will begin.
           * \return Source object for star hopper.
           */
     SkyObject *getShBeginObject() { return m_ShBeginObject; }
 
     /**
           * \brief Set SkyObject for which FinderChart is created.
           * \return SkyObject for which finder chart is created.
           */
     void setSkyObject(SkyObject *obj) { m_SkyObject = obj; }
 
     /**
           * \brief Set SkyObject at which star hopper will begin.
           * \return SkyObject at which star hopper will begin.
           */
     void setShBeginObject(SkyObject *obj) { m_ShBeginObject = obj; }
 
     /**
           * \brief Update Next/Previous step buttons.
           */
     void updateStepButtons();
 
     /**
           * \brief Set SkyMap to pointing mode and hide Printing Wizard.
           */
     void beginPointing();
 
     /**
           * \brief Enter star hopping begin pointing mode.
           */
     void beginShBeginPointing();
 
     /**
           * \brief Quit object pointing mode and set the pointed object.
           * \param obj Pointer to the SkyObject that was pointed on SkyMap.
           */
     void pointingDone(SkyObject *obj);
 
     /**
           * \brief Hide Printing Wizard and put SkyMap in FOV capture mode.
           */
     void beginFovCapture();
 
     /**
           * \brief Hide Printing Wizard and put SkyMap in FOV capture mode.
           * \param center Point at which SkyMap should be centered.
           * \param fov Field of view symbol, used to calculate zoom factor.
           */
-    void beginFovCapture(SkyPoint *center, FOV *fov = 0);
+    void beginFovCapture(SkyPoint *center, FOV *fov = nullptr);
 
     /**
           * \brief Capture current contents of FOV symbol.
           */
     void captureFov();
 
     /**
           * \brief Disable FOV capture mode.
           */
     void fovCaptureDone();
 
     /**
           * \brief Capture FOV snapshots using star hopper-based method.
           */
     void beginShFovCapture();
 
     /**
           * \brief Recapture FOV snapshot of passed index.
           * \param idx Index of the element to be recaptured.
           */
     void recaptureFov(int idx);
 
   private slots:
     /**
           * \brief Slot: go to the previous page of Printing Wizard.
           */
     void slotPrevPage();
 
     /**
           * \brief Slot: go to the next page of Printing Wizard.
           */
     void slotNextPage();
 
   private:
     /**
           * \brief Setup widget properties.
           */
     void setupWidgets();
 
     /**
           * \brief Update Previous/Next buttons.
           */
     void updateButtons();
 
     /**
           * \brief Private method, used to center SkyMap around passed SkyPoint, and enter FOV capture mode.
           * \param center Point at which SkyMap should be centered.
           * \param fov Field of view symbol, used to calculate zoom factor.
           */
-    void slewAndBeginCapture(SkyPoint *center, FOV *fov = 0);
+    void slewAndBeginCapture(SkyPoint *center, FOV *fov = nullptr);
 
     /**
           * \brief Create finder chart using settings from all steps.
           */
     void createFinderChart();
 
     KStars *m_KStars;
     FinderChart *m_FinderChart;
     SkyObject *m_SkyObject;
     QStackedWidget *m_WizardStack;
     QPrinter *m_Printer;
 
     FOV_TYPE m_FovType;
     QSize m_FovImageSize;
     SimpleFovExporter m_SimpleFovExporter;
 
     QList<FovSnapshot *> m_FovSnapshots;
 
     SkyObject *m_ShBeginObject;
     bool m_PointingShBegin;
 
     bool m_SwitchColors;
     QString m_PrevSchemeName;
 
     bool m_RecapturingFov;
     int m_RecaptureIdx;
 
     QPushButton *nextB, *backB;
 
     PWizWelcomeUI *m_WizWelcomeUI;
     PWizObjectSelectionUI *m_WizObjectSelectionUI;
     PWizFovTypeSelectionUI *m_WizFovTypeSelectionUI;
     PWizFovConfigUI *m_WizFovConfigUI;
     PWizFovManualUI *m_WizFovManualUI;
     PWizFovShUI *m_WizFovShUI;
     PWizFovBrowseUI *m_WizFovBrowseUI;
     PWizChartConfigUI *m_WizChartConfigUI;
     PWizChartContentsUI *m_WizChartContentsUI;
     PWizPrintUI *m_WizPrintUI;
 };
 
 #endif // PRINTINGWIZARD_H
diff --git a/kstars/printing/pwizchartconfig.h b/kstars/printing/pwizchartconfig.h
index 215e7353e..f0d16623b 100644
--- a/kstars/printing/pwizchartconfig.h
+++ b/kstars/printing/pwizchartconfig.h
@@ -1,56 +1,56 @@
 /***************************************************************************
                           pwizchartconfig.h  -  K Desktop Planetarium
                              -------------------
     begin                : Wed Aug 10 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZCHARTCONFIG_H
 #define PWIZCHARTCONFIG_H
 
 #include "ui_pwizchartconfig.h"
 
 /**
   * \class PWizChartConfigUI
   * \brief User interface for "Configure basic finder chart settings" step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizChartConfigUI : public QFrame, public Ui::PWizChartConfig
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizChartConfigUI(QWidget *parent = 0);
+    explicit PWizChartConfigUI(QWidget *parent = nullptr);
 
     /**
           * \brief Get entered chart title.
           * \return Chart title.
           */
     QString getChartTitle() { return titleEdit->text(); }
 
     /**
           * \brief Get entered chart subtitle.
           * \return Chart subtitle.
           */
     QString getChartSubtitle() { return subtitleEdit->text(); }
 
     /**
           * \brief Get entered chart description.
           * \return Chart description.
           */
     QString getChartDescription() { return descriptionTextEdit->toPlainText(); }
 };
 
 #endif // PWIZCHARTCONFIG_H
diff --git a/kstars/printing/pwizchartcontents.h b/kstars/printing/pwizchartcontents.h
index 891d2ad93..5da8b8c76 100644
--- a/kstars/printing/pwizchartcontents.h
+++ b/kstars/printing/pwizchartcontents.h
@@ -1,78 +1,78 @@
 /***************************************************************************
                           pwizchartcontents.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Aug 7 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZCHARTCONTENTS_H
 #define PWIZCHARTCONTENTS_H
 
 #include "ui_pwizchartcontents.h"
 
 class PrintingWizard;
 
 /**
   * \class PWizChartContentsUI
   * \brief User interface for "Configure chart contents" step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizChartContentsUI : public QFrame, public Ui::PWizChartContents
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizChartContentsUI(PrintingWizard *wizard, QWidget *parent = 0);
+    explicit PWizChartContentsUI(PrintingWizard *wizard, QWidget *parent = nullptr);
 
     /**
           * \brief Enable or disable specific fields depending on the type of selected object.
           */
     void entered();
 
     /**
           * \brief Check if general details table is enabled.
           * \return True if general details table is enabled.
           */
     bool isGeneralTableChecked();
 
     /**
           * \brief Check if position details table is enabled.
           * \return True if position details table is enabled.
           */
     bool isPositionTableChecked();
 
     /**
           * \brief Check if Rise/Set/Transit details table is enabled.
           * \return True if Rise/Set/Transit details table is enabled.
           */
     bool isRSTTableChecked();
 
     /**
           * \brief Check if Asteroid/Comet details table is enabled.
           * \return True if Asteroid/Comet details table is enabled.
           */
     bool isAstComTableChecked();
 
     /**
           * \brief Check if logging form is enabled.
           * \return True if logging form is enabled.
           */
     bool isLoggingFormChecked();
 
   private:
     PrintingWizard *m_ParentWizard;
 };
 
 #endif // PWIZCHARTCONTENTS_H
diff --git a/kstars/printing/pwizfovbrowse.h b/kstars/printing/pwizfovbrowse.h
index d2765e06e..5c94ed2ea 100644
--- a/kstars/printing/pwizfovbrowse.h
+++ b/kstars/printing/pwizfovbrowse.h
@@ -1,49 +1,49 @@
 /***************************************************************************
                           pwizfovbrowse.h  -  K Desktop Planetarium
                              -------------------
     begin                : Fri Aug 12 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZFOVBROWSER_H
 #define PWIZFOVBROWSER_H
 
 #include "ui_pwizfovbrowse.h"
 
 class PrintingWizard;
 
 /**
   * \class PWizFovBrowseUI
   * \brief User interface for "Browse captured FOV images" step of Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizFovBrowseUI : public QFrame, public Ui::PWizFovBrowse
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizFovBrowseUI(PrintingWizard *wizard, QWidget *parent = 0);
+    explicit PWizFovBrowseUI(PrintingWizard *wizard, QWidget *parent = nullptr);
 
   private slots:
     /**
           * \brief Slot: open FOV editor window.
           */
     void slotOpenFovEditor();
 
   private:
     PrintingWizard *m_ParentWizard;
 };
 
 #endif // PWIZFOVBROWSER_H
diff --git a/kstars/printing/pwizfovconfig.h b/kstars/printing/pwizfovconfig.h
index 0c2d2d7ea..c3bd8b5ab 100644
--- a/kstars/printing/pwizfovconfig.h
+++ b/kstars/printing/pwizfovconfig.h
@@ -1,105 +1,105 @@
 /***************************************************************************
                           pwizfovconfig.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Aug 14 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZFOVCONFIG_H
 #define PWIZFOVCONFIG_H
 
 #include "ui_pwizfovconfig.h"
 #include "legend.h"
 
 /**
   * \class PWizFovConfigUI
   * \brief User interface for "Configure common FOV export options" step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizFovConfigUI : public QFrame, public Ui::PWizFovConfig
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizFovConfigUI(QWidget *parent = 0);
+    explicit PWizFovConfigUI(QWidget *parent = nullptr);
 
     /**
           * \brief Check if switching to "Sky Chart" color scheme is enabled.
           * \return True if color scheme switching is enabled.
           */
     bool isSwitchColorsEnabled() { return switchColorsBox->isChecked(); }
 
     /**
           * \brief Check if FOV shape is always rectangular.
           * \return True if FOV shape is always rectangular.
           */
     bool isFovShapeOverriden() { return overrideShapeBox->isChecked(); }
 
     /**
           * \brief Check if legend will be added to FOV images.
           * \return True if legend will be added to FOV images.
           */
     bool isLegendEnabled() { return addLegendBox->isChecked(); }
 
     /**
           * \brief Check if alpha blending is enabled.
           * \return True if alpha blending is enabled.
           */
     bool isAlphaBlendingEnabled() { return useAlphaBlendBox->isChecked(); }
 
     /**
           * \brief Get selected legend type.
           * \return Selected legend type.
           */
     Legend::LEGEND_TYPE getLegendType();
 
     /**
           * \brief Get selected legend orientation.
           * \return Selected legend orientation.
           */
     Legend::LEGEND_ORIENTATION getLegendOrientation()
     {
         return static_cast<Legend::LEGEND_ORIENTATION>(orientationCombo->currentIndex());
     }
 
     /**
           * \brief Get selected legend position.
           * \return Selected legend position.
           */
     Legend::LEGEND_POSITION getLegendPosition()
     {
         return static_cast<Legend::LEGEND_POSITION>(positionCombo->currentIndex());
     }
 
   private slots:
     /**
           * \brief Slot: enable or disable legend configuration fields.
           * \param enabled True if legend configuration fields should be enabled.
           */
     void slotUpdateLegendFields(bool enabled);
 
   private:
     /**
           * \brief Configure widgets.
           */
     void setupWidgets();
 
     /**
           * \brief Configure signal-slot connections.
           */
     void setupConnections();
 };
 
 #endif // PWIZFOVCONFIG_H
diff --git a/kstars/printing/pwizfovmanual.h b/kstars/printing/pwizfovmanual.h
index ef845d4e6..f2f13d8ba 100644
--- a/kstars/printing/pwizfovmanual.h
+++ b/kstars/printing/pwizfovmanual.h
@@ -1,49 +1,49 @@
 /***************************************************************************
                           pwizfovmanual.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Aug 7 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZFOVMANUAL_H
 #define PWIZFOVMANUAL_H
 
 #include "ui_pwizfovmanual.h"
 
 class PrintingWizard;
 
 /**
   * \class PWizFovManualUI
   * \brief User interface for "Manual FOV capture" step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizFovManualUI : public QFrame, public Ui::PWizFovManual
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizFovManualUI(PrintingWizard *wizard, QWidget *parent = 0);
+    explicit PWizFovManualUI(PrintingWizard *wizard, QWidget *parent = nullptr);
 
   private slots:
     /**
           * \brief Slot: enter manual FOV capture mode.
           */
     void slotExportFov();
 
   private:
     PrintingWizard *m_ParentWizard;
 };
 
 #endif // PWIZFOVMANUAL_H
diff --git a/kstars/printing/pwizfovsh.h b/kstars/printing/pwizfovsh.h
index 955c2a77e..e9daefa04 100644
--- a/kstars/printing/pwizfovsh.h
+++ b/kstars/printing/pwizfovsh.h
@@ -1,93 +1,93 @@
 /***************************************************************************
                           pwizfovsh.h  -  K Desktop Planetarium
                              -------------------
     begin                : Mon Aug 15 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZFOVSH_H
 #define PWIZFOVSH_H
 
 #include "ui_pwizfovsh.h"
 
 class PrintingWizard;
 class SkyObject;
 
 /**
   * \class PWizFovShUI
   * \brief User interface for "Star hopper FOV snapshot capture" step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizFovShUI : public QFrame, public Ui::PWizFovSh
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizFovShUI(PrintingWizard *wizard, QWidget *parent = 0);
+    explicit PWizFovShUI(PrintingWizard *wizard, QWidget *parent = nullptr);
 
     /**
           * \brief Get magnitude limit set by user.
           * \return Magnitude limit set by user.
           */
     double getMaglim() { return maglimSpinBox->value(); }
 
     /**
           * \brief Get FOV name set by user.
           * \return FOV name set by user.
           */
     QString getFovName() { return fovCombo->currentText(); }
 
     /**
           * \brief Set object at which star hopper will begin.
           * \param obj Beginning object.
           */
     void setBeginObject(SkyObject *obj);
 
   private slots:
     /**
           * \brief Slot: select beginning object from list.
           */
     void slotSelectFromList();
 
     /**
           * \brief Slot: point beginning object on SkyMap.
           */
     void slotPointObject();
 
     /**
           * \brief Slot: open details window.
           */
     void slotDetails();
 
     /**
           * \brief Slot: begin capture.
           */
     void slotBeginCapture();
 
   private:
     /**
           * \brief Setup widgets.
           */
     void setupWidgets();
 
     /**
           * \brief Setup signal-slot connections.
           */
     void setupConnections();
 
     PrintingWizard *m_ParentWizard;
 };
 
 #endif // PWIZFOVSH_H
diff --git a/kstars/printing/pwizfovtypeselection.h b/kstars/printing/pwizfovtypeselection.h
index ca67cb400..4e189ccd2 100644
--- a/kstars/printing/pwizfovtypeselection.h
+++ b/kstars/printing/pwizfovtypeselection.h
@@ -1,48 +1,48 @@
 /***************************************************************************
                           pwizfovtypeselection.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Aug 7 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZFOVTYPESELECTION_H
 #define PWIZFOVTYPESELECTION_H
 
 #include "ui_pwizfovtypeselection.h"
 #include "printingwizard.h"
 
 /**
   * \class PWizFovTypeSelectionUI
   * \brief User interface for "Select FOV capture method" step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizFovTypeSelectionUI : public QFrame, public Ui::PWizFovTypeSelection
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizFovTypeSelectionUI(PrintingWizard *wizard, QWidget *parent = 0);
+    explicit PWizFovTypeSelectionUI(PrintingWizard *wizard, QWidget *parent = nullptr);
 
     /**
           * \brief Get selected FOV export method.
           * \return Selected FOV export method.
           */
     PrintingWizard::FOV_TYPE getFovExportType();
 
   private:
     PrintingWizard *m_ParentWizard;
 };
 
 #endif // PWIZFOVTYPESELECTION_H
diff --git a/kstars/printing/pwizobjectselection.h b/kstars/printing/pwizobjectselection.h
index 9a215a710..c4227a12a 100644
--- a/kstars/printing/pwizobjectselection.h
+++ b/kstars/printing/pwizobjectselection.h
@@ -1,72 +1,72 @@
 /***************************************************************************
                           pwizobjectselection.h  -  K Desktop Planetarium
                              -------------------
     begin                : Wed Aug 3 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef PWIZOBJECTSELECTION_H
 #define PWIZOBJECTSELECTION_H
 
 #include "ui_pwizobjectselection.h"
 
 class PrintingWizard;
 class SkyObject;
 
 /**
   * \class PWizObjectSelectionUI
   * \brief User interface for "Select observed object" step of the Printing Wizard.
   * \author Rafał Kułaga
   */
 class PWizObjectSelectionUI : public QFrame, public Ui::PWizObjectSelection
 {
     Q_OBJECT
   public:
     /**
           * \brief Constructor.
           */
-    explicit PWizObjectSelectionUI(PrintingWizard *wizard, QWidget *parent = 0);
+    explicit PWizObjectSelectionUI(PrintingWizard *wizard, QWidget *parent = nullptr);
 
     /**
           * \brief Update UI elements for newly selected SkyObject.
           * \param obj Selected SkyObject.
           */
     void setSkyObject(SkyObject *obj);
 
     /**
           * \brief Static function: get QString with basic information about SkyObject.
           * \param obj Selected SkyObject.
           */
     static QString objectInfoString(SkyObject *obj);
 
   private slots:
     /**
           * \brief Slot: open "Find Object" dialog to select SkyObject.
           */
     void slotSelectFromList();
 
     /**
           * \brief Slot: enter object pointing mode to select SkyObject.
           */
     void slotPointObject();
 
     /**
           * \brief Slot: show "Details" window for selected object.
           */
     void slotShowDetails();
 
   private:
     PrintingWizard *m_ParentWizard;
 };
 
 #endif // PWIZOBJECTSELECTION_H
diff --git a/kstars/printing/pwizprint.cpp b/kstars/printing/pwizprint.cpp
index 174324394..3c1bb4411 100644
--- a/kstars/printing/pwizprint.cpp
+++ b/kstars/printing/pwizprint.cpp
@@ -1,140 +1,140 @@
 /***************************************************************************
                           pwizprint.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Wed Aug 3 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "pwizprint.h"
 
 #include "finderchart.h"
 #include "kstars.h"
 #include "printingwizard.h"
 
 #include <KMessageBox>
 #include <KIO/StoredTransferJob>
 
 #include <QFileDialog>
 #include <QTemporaryFile>
 #include <QtPrintSupport/QPrintPreviewDialog>
 #include <QtPrintSupport/QPrinter>
 #include <QtPrintSupport/QPrintDialog>
 #include <QPointer>
 
 PWizPrintUI::PWizPrintUI(PrintingWizard *wizard, QWidget *parent) : QFrame(parent), m_ParentWizard(wizard)
 {
     setupUi(this);
 
     connect(previewButton, SIGNAL(clicked()), this, SLOT(slotPreview()));
     connect(printButton, SIGNAL(clicked()), this, SLOT(slotPrint()));
     connect(exportButton, SIGNAL(clicked()), this, SLOT(slotExport()));
 }
 
 void PWizPrintUI::slotPreview()
 {
     QPointer<QPrintPreviewDialog> previewDlg(new QPrintPreviewDialog(m_ParentWizard->getPrinter(), KStars::Instance()));
     connect(previewDlg, SIGNAL(paintRequested(QPrinter*)), SLOT(slotPrintPreview(QPrinter*)));
     previewDlg->exec();
     delete previewDlg;
 }
 
 void PWizPrintUI::slotPrintPreview(QPrinter *printer)
 {
     printDocument(printer);
 }
 
 void PWizPrintUI::slotPrint()
 {
     QPointer<QPrintDialog> dialog(new QPrintDialog(m_ParentWizard->getPrinter(), KStars::Instance()));
     if (dialog->exec() == QDialog::Accepted)
     {
         printDocument(m_ParentWizard->getPrinter());
     }
     delete dialog;
 }
 
 void PWizPrintUI::printDocument(QPrinter *printer)
 {
     m_ParentWizard->getFinderChart()->print(printer);
 }
 
 void PWizPrintUI::slotExport()
 {
     QUrl url =
         QFileDialog::getSaveFileUrl(KStars::Instance(), i18n("Export"), QUrl(QDir::homePath()),
                                     "application/pdf application/postscript application/vnd.oasis.opendocument.text");
     //User cancelled file selection dialog - abort image export
     if (url.isEmpty())
     {
         return;
     }
 
     //Warn user if file exists!
     if (QFile::exists(url.toLocalFile()))
     {
         int r = KMessageBox::warningContinueCancel(
             parentWidget(), i18n("A file named \"%1\" already exists. Overwrite it?", url.fileName()),
             i18n("Overwrite File?"), KStandardGuiItem::overwrite());
         if (r == KMessageBox::Cancel)
             return;
     }
 
     QString urlStr = url.url();
     if (!urlStr.contains(QDir::separator()))
     {
         urlStr = QDir::homePath() + '/' + urlStr;
     }
 
     QTemporaryFile tmpfile;
     tmpfile.open();
     QString fname;
 
     if (url.isValid())
     {
         if (url.isLocalFile())
         {
             fname = url.toLocalFile();
         }
 
         else
         {
             fname = tmpfile.fileName();
         }
 
         //Determine desired image format from filename extension
         QString ext = fname.mid(fname.lastIndexOf(".") + 1);
         if (ext == "pdf" || ext == "ps")
         {
             m_ParentWizard->getFinderChart()->writePsPdf(fname);
         }
         else if (ext == "odt")
         {
             m_ParentWizard->getFinderChart()->writeOdt(fname);
         }
         else
         {
             return;
         }
 
         if (tmpfile.fileName() == fname)
         {
             //attempt to upload image to remote location
             if (KIO::storedHttpPost(&tmpfile, url)->exec() == false)
             //if(!KIO::NetAccess::upload(tmpfile.fileName(), url, this))
             {
                 QString message = i18n("Could not upload file to remote location: %1", url.url());
-                KMessageBox::sorry(0, message, i18n("Could not upload file"));
+                KMessageBox::sorry(nullptr, message, i18n("Could not upload file"));
             }
         }
     }
 }
diff --git a/kstars/printing/simplefovexporter.cpp b/kstars/printing/simplefovexporter.cpp
index 03acf6bf2..d78e66286 100644
--- a/kstars/printing/simplefovexporter.cpp
+++ b/kstars/printing/simplefovexporter.cpp
@@ -1,216 +1,216 @@
 /***************************************************************************
                           simplefovexporter.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Thu Jul 7 2011
     copyright            : (C) 2011 by Rafał Kułaga
     email                : rl.kulaga@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "simplefovexporter.h"
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "skyqpainter.h"
 #include "fov.h"
 #include "skymapcomposite.h"
 #include "kstars/Options.h"
 
 SimpleFovExporter::SimpleFovExporter()
     : m_KSData(KStarsData::Instance()), m_Map(KStars::Instance()->map()), m_StopClock(false), m_OverrideFovShape(false),
-      m_DrawFovSymbol(false), m_PrevClockState(false), m_PrevSlewing(false), m_PrevPoint(0), m_PrevZoom(0)
+      m_DrawFovSymbol(false), m_PrevClockState(false), m_PrevSlewing(false), m_PrevPoint(nullptr), m_PrevZoom(0)
 {
 }
 
 void SimpleFovExporter::exportFov(SkyPoint *point, FOV *fov, QPaintDevice *pd)
 {
     saveState(true);
     pExportFov(point, fov, pd);
     restoreState(true);
 }
 
 void SimpleFovExporter::exportFov(FOV *fov, QPaintDevice *pd)
 {
-    pExportFov(0, fov, pd);
+    pExportFov(nullptr, fov, pd);
 }
 
 void SimpleFovExporter::exportFov(QPaintDevice *pd)
 {
     SkyQPainter painter(m_Map, pd);
     painter.begin();
 
     painter.drawSkyBackground();
 
     // translate painter coordinates - it's necessary to extract only the area of interest (FOV)
     int dx = (m_Map->width() - pd->width()) / 2;
     int dy = (m_Map->height() - pd->height()) / 2;
     painter.translate(-dx, -dy);
 
     m_KSData->skyComposite()->draw(&painter);
     m_Map->getSkyMapDrawAbstract()->drawOverlays(painter, false);
 }
 
 void SimpleFovExporter::exportFov(const QList<SkyPoint *> &points, const QList<FOV *> &fovs,
                                   const QList<QPaintDevice *> &pds)
 {
     Q_ASSERT(points.size() == fovs.size() && fovs.size() == pds.size());
 
     saveState(true);
 
     for (int i = 0; i < points.size(); i++)
     {
         exportFov(points.value(i), fovs.at(i), pds.value(i));
     }
 
     restoreState(true);
 }
 
 void SimpleFovExporter::exportFov(const QList<SkyPoint *> &points, FOV *fov, const QList<QPaintDevice *> &pds)
 {
     Q_ASSERT(points.size() == pds.size());
 
     saveState(true);
 
     for (int i = 0; i < points.size(); i++)
     {
         exportFov(points.at(i), fov, pds.at(i));
     }
 
     restoreState(true);
 }
 
 void SimpleFovExporter::pExportFov(SkyPoint *point, FOV *fov, QPaintDevice *pd)
 {
     if (point)
     {
         // center sky map on selected point
         m_Map->setClickedPoint(point);
         m_Map->slotCenter();
     }
 
     // this is temporary 'solution' that will be changed during the implementation of printing
     // on large paper sizes (>A4), in which case it'll be desirable to export high-res FOV
     // representations
     if (pd->height() > m_Map->height() || pd->width() > m_Map->width())
     {
         return;
     }
 
     // calculate zoom factor
     double zoom = 0;
     QRegion region;
     int regionX(0), regionY(0);
     double fovSizeX(0), fovSizeY(0);
     if (fov->sizeX() > fov->sizeY())
     {
         zoom = calculateZoomLevel(pd->width(), fov->sizeX());
 
         // calculate clipping region size
         fovSizeX = calculatePixelSize(fov->sizeX(), zoom);
         fovSizeY = calculatePixelSize(fov->sizeY(), zoom);
         regionX  = 0;
         regionY  = 0.5 * (pd->height() - fovSizeY);
     }
 
     else
     {
         zoom = calculateZoomLevel(pd->height(), fov->sizeY());
 
         // calculate clipping region size
         fovSizeX = calculatePixelSize(fov->sizeX(), zoom);
         fovSizeY = calculatePixelSize(fov->sizeY(), zoom);
         regionX  = 0.5 * (pd->width() - fovSizeX);
         regionY  = 0;
     }
 
     if (fov->shape() == FOV::SQUARE)
     {
         region = QRegion(regionX, regionY, fovSizeX, fovSizeY, QRegion::Rectangle);
     }
 
     else
     {
         region = QRegion(regionX, regionY, fovSizeX, fovSizeY, QRegion::Ellipse);
     }
 
     m_Map->setZoomFactor(zoom);
 
     SkyQPainter painter(m_Map, pd);
     painter.begin();
 
     painter.drawSkyBackground();
 
     if (!m_OverrideFovShape)
     {
         painter.setClipRegion(region);
     }
     // translate painter coordinates - it's necessary to extract only the area of interest (FOV)
     int dx = (m_Map->width() - pd->width()) / 2;
     int dy = (m_Map->height() - pd->height()) / 2;
     painter.translate(-dx, -dy);
 
     m_KSData->skyComposite()->draw(&painter);
     m_Map->getSkyMapDrawAbstract()->drawOverlays(painter, false);
 
     // reset painter coordinate transform to paint FOV symbol in the center
     painter.resetTransform();
 
     if (m_DrawFovSymbol)
     {
         fov->draw(painter, zoom);
     }
 }
 
 void SimpleFovExporter::saveState(bool savePos)
 {
     // stop simulation if it's not already stopped
     m_PrevClockState = m_KSData->clock()->isActive();
     if (m_StopClock && m_PrevClockState)
     {
         m_KSData->clock()->stop();
     }
 
     // disable useAnimatedSlewing option
     m_PrevSlewing = Options::useAnimatedSlewing();
     if (m_PrevSlewing)
     {
         Options::setUseAnimatedSlewing(false);
     }
 
     // save current central point and zoom level
-    m_PrevPoint = savePos ? m_Map->focusPoint() : 0;
+    m_PrevPoint = savePos ? m_Map->focusPoint() : nullptr;
     m_PrevZoom  = Options::zoomFactor();
 }
 
 void SimpleFovExporter::restoreState(bool restorePos)
 {
     // restore previous useAnimatedSlewing option
     if (m_PrevSlewing)
     {
         Options::setUseAnimatedSlewing(true);
     }
 
     if (restorePos)
     {
         // restore previous central point
         m_Map->setClickedPoint(m_PrevPoint);
         m_Map->slotCenter();
     }
     // restore previous zoom level
     m_Map->setZoomFactor(m_PrevZoom);
 
     // restore clock state (if it was stopped)
     if (m_StopClock && m_PrevClockState)
     {
         m_KSData->clock()->start();
     }
 }
diff --git a/kstars/projections/equirectangularprojector.h b/kstars/projections/equirectangularprojector.h
index 68dfd96ad..efc423fc6 100644
--- a/kstars/projections/equirectangularprojector.h
+++ b/kstars/projections/equirectangularprojector.h
@@ -1,44 +1,44 @@
 /*
     Copyright (C) 2010 Henry de Valence <hdevalence@gmail.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License along
     with this program; if not, write to the Free Software Foundation, Inc.,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 */
 
 #ifndef EQUIRECTANGULARPROJECTOR_H
 #define EQUIRECTANGULARPROJECTOR_H
 
 #include "projector.h"
 
 /**
  * @class EquirectangularProjector
  *
  * Implememntation of <a href="http://en.wikipedia.org/wiki/Equirectangular_projection">Equirectangular projection</a>
  *
  */
 class EquirectangularProjector : public Projector
 {
   public:
     explicit EquirectangularProjector(const ViewParams &p);
     Projection type() const override;
     double radius() const override;
     bool unusablePoint(const QPointF &p) const override;
-    Vector2f toScreenVec(const SkyPoint *o, bool oRefract = true, bool *onVisibleHemisphere = 0) const override;
+    Vector2f toScreenVec(const SkyPoint *o, bool oRefract = true, bool *onVisibleHemisphere = nullptr) const override;
     SkyPoint fromScreen(const QPointF &p, dms *LST, const dms *lat) const override;
-    QVector<Vector2f> groundPoly(SkyPoint *labelpoint = 0, bool *drawLabel = 0) const override;
+    QVector<Vector2f> groundPoly(SkyPoint *labelpoint = nullptr, bool *drawLabel = nullptr) const override;
     void updateClipPoly() override;
 };
 
 #endif // EQUIRECTANGULARPROJECTOR_H
diff --git a/kstars/projections/projector.h b/kstars/projections/projector.h
index 87481df5f..72583a340 100644
--- a/kstars/projections/projector.h
+++ b/kstars/projections/projector.h
@@ -1,296 +1,296 @@
 /*
     Copyright (C) 2010 Henry de Valence <hdevalence@gmail.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License along
     with this program; if not, write to the Free Software Foundation, Inc.,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 */
 
 #pragma once
 
 #ifdef KSTARS_LITE
 #include "skymaplite.h"
 #else
 #include "skymap.h"
 #endif
 #include "skyobjects/skypoint.h"
 
 #if __GNUC__ > 5
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wignored-attributes"
 #endif
 #if __GNUC__ > 6
 #pragma GCC diagnostic ignored "-Wint-in-bool-context"
 #endif
 #include <Eigen/Core>
 #if __GNUC__ > 5
 #pragma GCC diagnostic pop
 #endif
 
 #include <QPointF>
 
 #include <cstddef>
 #include <cmath>
 
 using namespace Eigen;
 
 class KStarsData;
 
 /** This is just a container that holds infromation needed to do projections. */
 class ViewParams
 {
   public:
     float width, height;
     float zoomFactor;
     bool useRefraction;
     bool useAltAz;
     bool fillGround; ///<If the ground is filled, then points below horizon are invisible
     SkyPoint *focus;
 };
 
 /**
  * @class Projector
  *
  * The Projector class is the primary class that serves as an interface to handle projections.
  */
 class Projector
 {
     Q_GADGET
   public:
     /**
      * Constructor.
      * @param p the ViewParams for this projection
      */
     explicit Projector(const ViewParams &p);
 
     virtual ~Projector();
 
     /** Update cached values for projector */
     void setViewParams(const ViewParams &p);
 
     enum Projection
     {
         Lambert,
         AzimuthalEquidistant,
         Orthographic,
         Equirectangular,
         Stereographic,
         Gnomonic,
         UnknownProjection
     };
     Q_ENUM(Projection)
 
     /** Return the type of this projection */
     Q_INVOKABLE virtual Projection type() const = 0;
 
     /** Return the FOV of this projection */
     double fov() const;
 
     /**
      * Check if the current point on screen is a valid point on the sky. This is needed
      * to avoid a crash of the program if the user clicks on a point outside the sky (the
      * corners of the sky map at the lowest zoom level are the invalid points).
      * @param p the screen pixel position
      */
     virtual bool unusablePoint(const QPointF &p) const;
 
     /**
      * Given the coordinates of the SkyPoint argument, determine the
      * pixel coordinates in the SkyMap.
      *
      * Since most of the projections used by KStars are very similar,
      * if this function were to be reimplemented in each projection subclass
      * we would end up changing maybe 5 or 6 lines out of 150.
      * Instead, we have a default implementation that uses the projectionK
      * and projectionL functions to take care of the differences between
      * e.g. Orthographic and Stereographic. There is also the cosMaxFieldAngle
      * function, which is used for testing whether a point is on the visible
      * part of the projection, and the radius function which gives the radius of
      * the projection in screen coordinates.
      *
      * While this seems ugly, it is less ugly than duplicating 150 loc to change 5.
      *
      * @return Vector2f containing screen pixel x, y coordinates of SkyPoint.
      * @param o pointer to the SkyPoint for which to calculate x, y coordinates.
      * @param oRefract true = use Options::useRefraction() value.
      *   false = do not use refraction.  This argument is only needed
      *   for the Horizon, which should never be refracted.
      * @param onVisibleHemisphere pointer to a bool to indicate whether the point is
      *   on the visible part of the Celestial Sphere.
      */
-    virtual Vector2f toScreenVec(const SkyPoint *o, bool oRefract = true, bool *onVisibleHemisphere = 0) const;
+    virtual Vector2f toScreenVec(const SkyPoint *o, bool oRefract = true, bool *onVisibleHemisphere = nullptr) const;
 
     /**
      * This is exactly the same as toScreenVec but it returns a QPointF.
      * It just calls toScreenVec and converts the result.
      * @see toScreenVec()
      */
-    QPointF toScreen(const SkyPoint *o, bool oRefract = true, bool *onVisibleHemisphere = 0) const;
+    QPointF toScreen(const SkyPoint *o, bool oRefract = true, bool *onVisibleHemisphere = nullptr) const;
 
     /**
      * @short Determine RA, Dec coordinates of the pixel at (dx, dy), which are the
      * screen pixel coordinate offsets from the center of the Sky pixmap.
      * @param the screen pixel position to convert
      * @param LST pointer to the local sidereal time, as a dms object.
      * @param lat pointer to the current geographic laitude, as a dms object
      */
     virtual SkyPoint fromScreen(const QPointF &p, dms *LST, const dms *lat) const;
 
     /**
      * ASSUMES *p1 did not clip but *p2 did.  Returns the QPointF on the line
      * between *p1 and *p2 that just clips.
      */
     QPointF clipLine(SkyPoint *p1, SkyPoint *p2) const;
 
     /**
      * ASSUMES *p1 did not clip but *p2 did.  Returns the Vector2f on the line
      * between *p1 and *p2 that just clips.
      */
     Vector2f clipLineVec(SkyPoint *p1, SkyPoint *p2) const;
 
     /** Check whether the projected point is on-screen */
     bool onScreen(const QPointF &p) const;
     bool onScreen(const Vector2f &p) const;
 
     /**
      * @short Determine if the skypoint p is likely to be visible in the display window.
      *
      * checkVisibility() is an optimization function.  It determines whether an object
      * appears within the bounds of the skymap window, and therefore should be drawn.
      * The idea is to save time by skipping objects which are off-screen, so it is
      * absolutely essential that checkVisibility() is significantly faster than
      * the computations required to draw the object to the screen.
      *
      * If the ground is to be filled, the function first checks whether the point is
      * below the horizon, because they will be covered by the ground anyways.
      * Importantly, it does not call the expensive EquatorialToHorizontal function.
      * This means that the horizontal coordinates MUST BE CORRECT! The vast majority
      * of points are already synchronized, so recomputing the horizontal coordinates is
      * a waste.
      *
      * The function then checks the difference between the Declination/Altitude
      * coordinate of the Focus position, and that of the point p.  If the absolute
      * value of this difference is larger than fov, then the function returns false.
      * For most configurations of the sky map window, this simple check is enough to
      * exclude a large number of objects.
      *
      * Next, it determines if one of the poles of the current Coordinate System
      * (Equatorial or Horizontal) is currently inside the sky map window.  This is
      * stored in the member variable 'bool SkyMap::isPoleVisible, and is set by the
      * function SkyMap::setMapGeometry(), which is called by SkyMap::paintEvent().
      * If a Pole is visible, then it will return true immediately.  The idea is that
      * when a pole is on-screen it is computationally expensive to determine whether
      * a particular position is on-screen or not: for many valid Dec/Alt values, *all*
      * values of RA/Az will indeed be onscreen, but for other valid Dec/Alt values,
      * only *most* RA/Az values are onscreen.  It is cheaper to simply accept all
      * "horizontal" RA/Az values, since we have already determined that they are
      * on-screen in the "vertical" Dec/Alt coordinate.
      *
      * Finally, if no Pole is onscreen, it checks the difference between the Focus
      * position's RA/Az coordinate and that of the point p.  If the absolute value of
      * this difference is larger than XMax, the function returns false.  Otherwise,
      * it returns true.
      *
      * @param p pointer to the skypoint to be checked.
      * @return true if the point p was found to be inside the Sky map window.
      * @see SkyMap::setMapGeometry()
      * @see SkyMap::fov()
      * @note If you are creating skypoints using equatorial coordinates, then
      * YOU MUST CALL EQUATORIALTOHORIZONTAL BEFORE THIS FUNCTION!
      */
     bool checkVisibility(const SkyPoint *p) const;
 
     /**
      * Determine the on-screen position angle of a SkyPont with recept with NCP.
      * This is the object's sky position angle (w.r.t. North).
      * of "North" at the position of the object (w.r.t. the screen Y-axis).
      * The latter is determined by constructing a test point with the same RA but
      * a slightly increased Dec as the object, and calculating the angle w.r.t. the
      * Y-axis of the line connecing the object to its test point.
      */
     double findNorthPA(SkyPoint *o, float x, float y) const;
 
     /**
      * Determine the on-screen position angle of a SkyObject.  This is the sum
      * of the object's sky position angle (w.r.t. North), and the position angle
      * of "North" at the position of the object (w.r.t. the screen Y-axis).
      * The latter is determined by constructing a test point with the same RA but
      * a slightly increased Dec as the object, and calculating the angle w.r.t. the
      * Y-axis of the line connecing the object to its test point.
      */
     double findPA(SkyObject *o, float x, float y) const;
 
     /**
      * Get the ground polygon
      * @param labelpoint This point will be set to something suitable for attaching a label
      * @param drawLabel this tells whether to draw a label.
      * @return the ground polygon
      */
-    virtual QVector<Vector2f> groundPoly(SkyPoint *labelpoint = 0, bool *drawLabel = 0) const;
+    virtual QVector<Vector2f> groundPoly(SkyPoint *labelpoint = nullptr, bool *drawLabel = nullptr) const;
 
     /**
      * @brief updateClipPoly calculate the clipping polygen given the current FOV.
      */
     virtual void updateClipPoly();
 
     /**
      * @return the clipping polygen covering the visible sky area. Anything outside this polygon is
      * clipped by QPainter.
      */
     virtual QPolygonF clipPoly() const;
 
   protected:
     /**
      * Get the radius of this projection's sky circle.
      * @return the radius in radians
      */
     virtual double radius() const { return 2 * M_PI; }
 
     /**
      * This function handles some of the projection-specific code.
      * @see toScreen()
      */
     virtual double projectionK(double x) const { return x; }
 
     /**
      * This function handles some of the projection-specific code.
      * @see toScreen()
      */
     virtual double projectionL(double x) const { return x; }
 
     /**
      * This function returns the cosine of the maximum field angle, i.e., the maximum angular
      * distance from the focus for which a point should be projected. Default is 0, i.e.,
      * 90 degrees.
      */
     virtual double cosMaxFieldAngle() const { return 0; }
 
     /**
      * Helper function for drawing ground.
      * @return the point with Alt = 0, az = @p az
      */
     static SkyPoint pointAt(double az);
 
     KStarsData *m_data { nullptr };
     ViewParams m_vp;
     double m_sinY0 { 0 };
     double m_cosY0 { 0 };
     double m_fov { 0 };
     QPolygonF m_clipPolygon;
 
   private:
     //Used by CheckVisibility
     double m_xrange { 0 };
     bool m_isPoleVisible { false };
 };
diff --git a/kstars/skycomponents/asteroidscomponent.cpp b/kstars/skycomponents/asteroidscomponent.cpp
index 72955e684..beaff9b5a 100644
--- a/kstars/skycomponents/asteroidscomponent.cpp
+++ b/kstars/skycomponents/asteroidscomponent.cpp
@@ -1,319 +1,319 @@
 /***************************************************************************
                           asteroidscomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/30/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include <cmath>
 #include <QDebug>
 #include <QStandardPaths>
 #include <QHttpMultiPart>
 #include <QPen>
 
 #include <KLocalizedString>
 
 #include "asteroidscomponent.h"
 
 #ifndef KSTARS_LITE
 #include "kstars.h"
 #endif
 #include "auxiliary/filedownloader.h"
 #include "projections/projector.h"
 #include "solarsystemcomposite.h"
 #include "skycomponent.h"
 #include "skylabeler.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #else
 #include "kstarslite.h"
 #endif
 #include "skypainter.h"
 #include "Options.h"
 #include "skyobjects/ksasteroid.h"
 #include "kstarsdata.h"
 #include "ksfilereader.h"
 #include "auxiliary/kspaths.h"
 #include "auxiliary/ksnotification.h"
 
 AsteroidsComponent::AsteroidsComponent(SolarSystemComposite *parent) : SolarSystemListComponent(parent)
 {
     loadData();
 }
 
 AsteroidsComponent::~AsteroidsComponent()
 {
 }
 
 bool AsteroidsComponent::selected()
 {
     return Options::showAsteroids();
 }
 
 /*
  *@short Initialize the asteroids list.
  *Reads in the asteroids data from the asteroids.dat file.
  *
  * The data file is a CSV file with the following columns :
  * @li 1 full name [string]
  * @li 2 Modified Julian Day of orbital elements [int]
  * @li 3 perihelion distance in AU [double]
  * @li 4 semi-major axis
  * @li 5 eccentricity of orbit [double]
  * @li 6 inclination angle of orbit in degrees [double]
  * @li 7 argument of perihelion in degrees [double]
  * @li 8 longitude of the ascending node in degrees [double]
  * @li 9 mean anomaly
  * @li 10 time of perihelion passage (YYYYMMDD.DDD) [double]
  * @li 11 orbit solution ID [string]
  * @li 12 absolute magnitude [float]
  * @li 13 slope parameter [float]
  * @li 14 Near-Earth Object (NEO) flag [bool]
  * @li 15 comet total magnitude parameter [float] (we should remove this column)
  * @li 16 comet nuclear magnitude parameter [float] (we should remove this column)
  * @li 17 object diameter (from equivalent sphere) [float]
  * @li 18 object bi/tri-axial ellipsoid dimensions [string]
  * @li 19 geometric albedo [float]
  * @li 20 rotation period [float]
  * @li 21 orbital period [float]
  * @li 22 earth minimum orbit intersection distance [double]
  * @li 23 orbit classification [string]
  */
 void AsteroidsComponent::loadData()
 {
     QString name, full_name, orbit_id, orbit_class, dimensions;
     int mJD;
     double q, a, e, dble_i, dble_w, dble_N, dble_M, H, G, earth_moid;
     long double JD;
     float diameter, albedo, rot_period, period;
     bool neo;
 
     emitProgressText(i18n("Loading asteroids"));
 
     // Clear lists
     qDeleteAll(m_ObjectList);
     m_ObjectList.clear();
 
     objectLists(SkyObject::ASTEROID).clear();
     objectNames(SkyObject::ASTEROID).clear();
 
     QList<QPair<QString, KSParser::DataTypes>> sequence;
     sequence.append(qMakePair(QString("full name"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("epoch_mjd"), KSParser::D_INT));
     sequence.append(qMakePair(QString("q"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("a"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("e"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("i"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("w"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("om"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("ma"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("tp_calc"), KSParser::D_SKIP));
     sequence.append(qMakePair(QString("orbit_id"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("H"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("G"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("neo"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("tp_calc"), KSParser::D_SKIP));
     sequence.append(qMakePair(QString("M2"), KSParser::D_SKIP));
     sequence.append(qMakePair(QString("diameter"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("extent"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("albedo"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("rot_period"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("per_y"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("moid"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("class"), KSParser::D_QSTRING));
 
     //QString file_name = KSPaths::locate( QStandardPaths::DataLocation,  );
     QString file_name = KSPaths::locate(QStandardPaths::GenericDataLocation, QString("asteroids.dat"));
     KSParser asteroid_parser(file_name, '#', sequence);
 
     QHash<QString, QVariant> row_content;
     while (asteroid_parser.HasNextRow())
     {
         row_content = asteroid_parser.ReadNextRow();
         full_name   = row_content["full name"].toString();
         full_name   = full_name.trimmed();
         int catN    = full_name.section(' ', 0, 0).toInt();
 
         name = full_name.section(' ', 1, -1);
 
         //JM temporary hack to avoid Europa,Io, and Asterope duplication
         if (name == "Europa" || name == "Io" || name == "Asterope")
             name += i18n(" (Asteroid)");
 
         mJD         = row_content["epoch_mjd"].toInt();
         q           = row_content["q"].toDouble();
         a           = row_content["a"].toDouble();
         e           = row_content["e"].toDouble();
         dble_i      = row_content["i"].toDouble();
         dble_w      = row_content["w"].toDouble();
         dble_N      = row_content["om"].toDouble();
         dble_M      = row_content["ma"].toDouble();
         orbit_id    = row_content["orbit_id"].toString();
         H           = row_content["H"].toDouble();
         G           = row_content["G"].toDouble();
         neo         = row_content["neo"].toString() == "Y";
         diameter    = row_content["diameter"].toFloat();
         dimensions  = row_content["extent"].toString();
         albedo      = row_content["albedo"].toFloat();
         rot_period  = row_content["rot_period"].toFloat();
         period      = row_content["per_y"].toFloat();
         earth_moid  = row_content["moid"].toDouble();
         orbit_class = row_content["class"].toString();
 
         JD = static_cast<double>(mJD) + 2400000.5;
 
         KSAsteroid *new_asteroid = nullptr;
 
         // JM: Hack since asteroid file (Generated by JPL) is missing important Pluto data
         // I emailed JPL and this hack will be removed once they update the data!
         if (name == "Pluto")
         {
             diameter = 2368;
             new_asteroid =
                 new KSAsteroid(catN, name, "pluto", JD, a, e, dms(dble_i), dms(dble_w), dms(dble_N), dms(dble_M), H, G);
         }
         else
             new_asteroid = new KSAsteroid(catN, name, QString(), JD, a, e, dms(dble_i), dms(dble_w), dms(dble_N),
                                           dms(dble_M), H, G);
 
         new_asteroid->setPerihelion(q);
         new_asteroid->setOrbitID(orbit_id);
         new_asteroid->setNEO(neo);
         new_asteroid->setDiameter(diameter);
         new_asteroid->setDimensions(dimensions);
         new_asteroid->setAlbedo(albedo);
         new_asteroid->setRotationPeriod(rot_period);
         new_asteroid->setPeriod(period);
         new_asteroid->setEarthMOID(earth_moid);
         new_asteroid->setOrbitClass(orbit_class);
         new_asteroid->setPhysicalSize(diameter);
         //new_asteroid->setAngularSize(0.005);
 
         m_ObjectList.append(new_asteroid);
         // Add name to the list of object names
         objectNames(SkyObject::ASTEROID).append(name);
         objectLists(SkyObject::ASTEROID).append(QPair<QString, const SkyObject *>(name, new_asteroid));
     }
 }
 
 void AsteroidsComponent::draw(SkyPainter *skyp)
 {
     Q_UNUSED(skyp)
 #ifndef KSTARS_LITE
     if (!selected())
         return;
 
     bool hideLabels = !Options::showAsteroidNames() || (SkyMap::Instance()->isSlewing() && Options::hideLabels());
 
     double lgmin         = log10(MINZOOM);
     double lgmax         = log10(MAXZOOM);
     double lgz           = log10(Options::zoomFactor());
     double labelMagLimit = 2.5 + Options::asteroidLabelDensity() / 5.0;
     labelMagLimit += (15.0 - labelMagLimit) * (lgz - lgmin) / (lgmax - lgmin);
     if (labelMagLimit > 10.0)
         labelMagLimit = 10.0;
     //printf("labelMagLim = %.1f\n", labelMagLimit );
 
     skyp->setBrush(QBrush(QColor("gray")));
 
     foreach (SkyObject *so, m_ObjectList)
     {
         // FIXME: God help us!
         KSAsteroid *ast = (KSAsteroid *)so;
 
         if (ast->mag() > Options::magLimitAsteroid() || std::isnan(ast->mag()) != 0)
             continue;
 
         bool drawn = false;
 
         if (ast->image().isNull() == false)
             drawn = skyp->drawPlanet(ast);
         else
             drawn = skyp->drawPointSource(ast, ast->mag());
 
         if (drawn && !(hideLabels || ast->mag() >= labelMagLimit))
             SkyLabeler::AddLabel(ast, SkyLabeler::ASTEROID_LABEL);
     }
 #endif
 }
 
 SkyObject *AsteroidsComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
-    SkyObject *oBest = 0;
+    SkyObject *oBest = nullptr;
 
     if (!selected())
-        return 0;
+        return nullptr;
 
     foreach (SkyObject *o, m_ObjectList)
     {
         if (o->mag() > Options::magLimitAsteroid())
             continue;
 
         double r = o->angularDistanceTo(p).Degrees();
         if (r < maxrad)
         {
             oBest  = o;
             maxrad = r;
         }
     }
 
     return oBest;
 }
 
 void AsteroidsComponent::updateDataFile()
 {
     downloadJob = new FileDownloader();
 
     downloadJob->setProgressDialogEnabled(true, i18n("Asteroid Update"), i18n("Downloading asteroids updates..."));
     downloadJob->registerDataVerification([&](const QByteArray &data) { return data.startsWith("full_name");});
 
     QObject::connect(downloadJob, SIGNAL(downloaded()), this, SLOT(downloadReady()));
     QObject::connect(downloadJob, SIGNAL(error(QString)), this, SLOT(downloadError(QString)));
 
     QUrl url = QUrl("https://ssd.jpl.nasa.gov/sbdb_query.cgi");
 
     QByteArray mag       = QString::number(Options::magLimitAsteroidDownload()).toUtf8();
     QByteArray post_data = KSUtils::getJPLQueryString("ast", "AcBdBiBhBgBjBlBkBmBqBbAiAjAgAkAlApAqArAsBsBtCh",
                                                       QVector<KSUtils::JPLFilter>{ { "Ai", "<", mag } });
 
     downloadJob->post(url, post_data);
 }
 
 void AsteroidsComponent::downloadReady()
 {
     // Comment the first line
     QByteArray data = downloadJob->downloadedData();
     data.insert(0, '#');
 
     // Write data to asteroids.dat
     QFile file(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "asteroids.dat");
     file.open(QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text);
     file.write(data);
     file.close();
 
     // Reload asteroids
     loadData();
 #ifdef KSTARS_LITE
     KStarsLite::Instance()->data()->setFullTimeUpdate();
 #else
     KStars::Instance()->data()->setFullTimeUpdate();
 #endif
     downloadJob->deleteLater();
 }
 
 void AsteroidsComponent::downloadError(const QString &errorString)
 {
     KSNotification::error(i18n("Error downloading asteroids data: %1", errorString));
     qDebug() << i18n("Error downloading asteroids data: %1", errorString);
     downloadJob->deleteLater();
 }
diff --git a/kstars/skycomponents/catalogcomponent.cpp b/kstars/skycomponents/catalogcomponent.cpp
index 60eaa9457..f12e0d179 100644
--- a/kstars/skycomponents/catalogcomponent.cpp
+++ b/kstars/skycomponents/catalogcomponent.cpp
@@ -1,241 +1,241 @@
 /***************************************************************************
                     catalogcomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/17/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "catalogcomponent.h"
 
 #include "catalogdata.h"
 #include "kstarsdata.h"
 #include "skypainter.h"
 #include "skyobjects/starobject.h"
 #include "skyobjects/deepskyobject.h"
 
 CatalogComponent::CatalogComponent(SkyComposite *parent, const QString &catname, bool showerrs, int index,
                                    bool callLoadData)
     : ListComponent(parent), m_catName(catname), m_Showerrs(showerrs), m_ccIndex(index)
 {
     if (callLoadData)
         loadData();
 }
 
 CatalogComponent::~CatalogComponent()
 {
     // EH? WHY IS THIS EMPTY? -- AS
 
     // FIXME: Check this and implement it properly when you're not as
     // desperate to sleep as I am right now. -- AS
 
     /*
     auto removeFromContainer = []( auto &thingToRemove, auto &container ) {
         container.remove( container.indexOf( thingToRemove ) );
     };
 
     foreach ( SkyObject *obj, m_ObjectList ) {
         // FIXME: Should the name removal be done here!? What part of this giant edifice of code is supposed to take care of this? SkyMapComposite? -- AS
         // FIXME: Removing from any of these containers is VERY SLOW (QList will be O(N) to find and O(1) to remove, whereas QVector will be O(N) to find and O(N) to remove...) -- AS
         removeFromComtainer( objectNames( obj->type() ), obj->name() );
         removeFromContainer( objectLists(obj->type()), QPair<QString, const SkyObject *>(obj->name(), obj) );
         removeFromContainer( objectLists(obj->type()), QPair<QString, const SkyObject *>(obj->longname(), obj) );
 
         delete obj;
     }
     */
 }
 
 void CatalogComponent::_loadData(bool includeCatalogDesignation)
 {
     if (includeCatalogDesignation)
         emitProgressText(i18n("Loading custom catalog: %1", m_catName));
     else
         emitProgressText(i18n("Loading internal catalog: %1", m_catName));
 
     QList<QPair<int, QString>> names;
 
     KStarsData::Instance()->catalogdb()->GetAllObjects(m_catName, m_ObjectList, names, this, includeCatalogDesignation);
     for (int iter = 0; iter < names.size(); ++iter)
     {
         if (names.at(iter).first <= SkyObject::TYPE_UNKNOWN)
         {
             //FIXME JM 2016-06-02: inefficient and costly check
             // Need better way around this
             //if (!objectNames(names.at(iter).first).contains(names.at(iter).second))
 
             // AS: FIXME -- after Artem Fedoskin introduced the
             // objectLists, which is definitely better, we should
             // really work towards doing away with this.
 
             // N.B. It might be better to use a std::multiset instead
             // of QVector<QPair<>>, because it allows for inexpensive
             // O(log N) lookups, but the filter and find will be very
             // quick because of the binary search tree. HOWEVER, it
             // will come at the cost of a lot of code complexity,
             // since std:: containers may not work well out of the box
             // with Qt's MVC system, so this would be desirable only
             // if N (number of named objects in KStars) becomes very
             // very large such that the filtering in Find Dialog takes
             // too long. -- AS
 
             objectNames(names.at(iter).first).append(names.at(iter).second);
         }
     }
 
     //FIXME - get rid of objectNames completely. For now only KStars Lite uses objectLists
     for (int iter = 0; iter < m_ObjectList.size(); ++iter)
     {
         SkyObject *obj = m_ObjectList[iter];
         Q_ASSERT(obj);
         if (obj->type() <= SkyObject::TYPE_UNKNOWN)
         {
             QVector<QPair<QString, const SkyObject *>> &objects = objectLists(obj->type());
             bool dupName                                        = false;
             bool dupLongname                                    = false;
 
             QString name     = obj->name();
             QString longname = obj->longname();
 
             //FIXME - find a better way to check for duplicates
 
             // FIXME: AS: There is an argument for why we may not want
             // to remove duplicates -- when the object is removed, all
             // names seem to be removed, so if there are two objects
             // in KStars with the same name in two different catalogs
             // (e.g. Arp 148 from Arp catalog, and Arp 148 from some
             // miscellaneous catalog), then disabling one catalog
             // removes the name entirely from the list.
 
             for (int i = 0; i < objects.size(); ++i)
             {
                 if (name == objects.at(i).first)
                     dupName = true;
                 if (longname == objects.at(i).first)
                     dupLongname = true;
             }
 
             if (!dupName)
             {
                 objectLists(obj->type()).append(QPair<QString, const SkyObject *>(name, obj));
             }
 
             if (!longname.isEmpty() && !dupLongname && name != longname)
             {
                 objectLists(obj->type()).append(QPair<QString, const SkyObject *>(longname, obj));
             }
         }
     }
 
     // Remove Duplicates (see FIXME by AS above)
     for (auto &list : objectNames())
         list.removeDuplicates();
 
     CatalogData loaded_catalog_data;
     KStarsData::Instance()->catalogdb()->GetCatalogData(m_catName, loaded_catalog_data);
     m_catColor    = loaded_catalog_data.color;
     m_catFluxFreq = loaded_catalog_data.fluxfreq;
     m_catFluxUnit = loaded_catalog_data.fluxunit;
 }
 
 void CatalogComponent::update(KSNumbers *)
 {
     if (selected())
     {
         KStarsData *data = KStarsData::Instance();
         foreach (SkyObject *obj, m_ObjectList)
         {
             DeepSkyObject *dso = dynamic_cast<DeepSkyObject *>(obj);
             StarObject *so     = dynamic_cast<StarObject *>(obj);
             Q_ASSERT(dso || so); // We either have stars, or deep sky objects
             if (dso)
             {
                 // Update the deep sky object if need be
                 if (dso->updateID != data->updateID())
                 {
                     dso->updateID = data->updateID();
                     if (dso->updateNumID != data->updateNumID())
                     {
                         dso->updateCoords(data->updateNum());
                     }
                     dso->EquatorialToHorizontal(data->lst(), data->geo()->lat());
                 }
             }
             else
             {
                 // Do exactly the same thing for stars
                 if (so->updateID != data->updateID())
                 {
                     so->updateID = data->updateID();
                     if (so->updateNumID != data->updateNumID())
                     {
                         so->updateCoords(data->updateNum());
                     }
                     so->EquatorialToHorizontal(data->lst(), data->geo()->lat());
                 }
             }
         }
         this->updateID = data->updateID();
     }
 }
 
 void CatalogComponent::draw(SkyPainter *skyp)
 {
     if (!selected())
         return;
 
     skyp->setBrush(Qt::NoBrush);
     skyp->setPen(QColor(m_catColor));
 
     // Check if the coordinates have been updated
     if (updateID != KStarsData::Instance()->updateID())
-        update(0);
+        update(nullptr);
 
     //Draw Custom Catalog objects
     // FIXME: Improve using HTM!
     foreach (SkyObject *obj, m_ObjectList)
     {
         if (obj->type() == 0)
         {
             StarObject *starobj = static_cast<StarObject *>(obj);
             // FIXME SKYPAINTER
             skyp->drawPointSource(starobj, starobj->mag(), starobj->spchar());
         }
         else
         {
             // FIXME: this PA calc is totally different from the one that was
             // in DeepSkyComponent which is now in SkyPainter .... O_o
             //      --hdevalence
             // PA for Deep-Sky objects is 90 + PA because major axis is
             // horizontal at PA=0
             // double pa = 90. + map->findPA( dso, o.x(), o.y() );
             //
             // ^ Not sure if above is still valid -- asimha 2016/08/16
             DeepSkyObject *dso = static_cast<DeepSkyObject *>(obj);
             skyp->drawDeepSkyObject(dso, true);
         }
     }
 }
 
 bool CatalogComponent::getVisibility()
 {
     return (Options::showCatalog().at(m_ccIndex) > 0) ? true : false;
 }
 
 bool CatalogComponent::selected()
 {
     // Do not draw / update custom catalogs if show deep-sky is turned off, even if they are chosen.
     if (Options::showCatalogNames().contains(m_catName) && Options::showDeepSky())
         return true;
 
     return false;
 }
diff --git a/kstars/skycomponents/cometscomponent.cpp b/kstars/skycomponents/cometscomponent.cpp
index 0764a5e11..76d8993a5 100644
--- a/kstars/skycomponents/cometscomponent.cpp
+++ b/kstars/skycomponents/cometscomponent.cpp
@@ -1,270 +1,270 @@
 /***************************************************************************
                           cometscomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/24/09
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include <cmath>
 #include <QStandardPaths>
 #include <QDebug>
 #include <QFile>
 #include <QPen>
 #include <QHttpMultiPart>
 
 #include "cometscomponent.h"
 #include "solarsystemcomposite.h"
 
 #include "Options.h"
 #include "skyobjects/kscomet.h"
 #include "ksutils.h"
 #ifndef KSTARS_LITE
 #include "kstars.h"
 #endif
 #include "kstarsdata.h"
 #include "ksfilereader.h"
 #include "auxiliary/kspaths.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #else
 #include "kstarslite.h"
 #endif
 #include "skylabeler.h"
 #include "skypainter.h"
 #include "projections/projector.h"
 #include "auxiliary/filedownloader.h"
 #include "kspaths.h"
 #include "ksutils.h"
 
 CometsComponent::CometsComponent(SolarSystemComposite *parent) : SolarSystemListComponent(parent)
 {
     loadData();
 }
 
 CometsComponent::~CometsComponent()
 {
 }
 
 bool CometsComponent::selected()
 {
     return Options::showComets();
 }
 
 /*
  * @short Initialize the comets list.
  * Reads in the comets data from the comets.dat file.
  *
  * Populate the list of Comets from the data file.
  * The data file is a CSV file with the following columns :
  * @li 1 full name [string]
  * @li 2 modified julian day of orbital elements [int]
  * @li 3 perihelion distance in AU [double]
  * @li 4 eccentricity of orbit [double]
  * @li 5 inclination angle of orbit in degrees [double]
  * @li 6 argument of perihelion in degrees [double]
  * @li 7 longitude of the ascending node in degrees [double]
  * @li 8 time of perihelion passage (YYYYMMDD.DDD) [double]
  * @li 9 orbit solution ID [string]
  * @li 10 Near-Earth Object (NEO) flag [bool]
  * @li 11 comet total magnitude parameter [float]
  * @li 12 comet nuclear magnitude parameter [float]
  * @li 13 object diameter (from equivalent sphere) [float]
  * @li 14 object bi/tri-axial ellipsoid dimensions [string]
  * @li 15 geometric albedo [float]
  * @li 16 rotation period [float]
  * @li 17 orbital period [float]
  * @li 18 earth minimum orbit intersection distance [double]
  * @li 19 orbit classification [string]
  * @li 20 comet total magnitude slope parameter
  * @li 21 comet nuclear magnitude slope parameter
  * @note See KSComet constructor for more details.
  */
 void CometsComponent::loadData()
 {
     QString name, orbit_id, orbit_class, dimensions;
     bool neo;
     int mJD;
     double q, e, dble_i, dble_w, dble_N, Tp, earth_moid;
     long double JD;
     float M1, M2, K1, K2, diameter, albedo, rot_period, period;
 
     emitProgressText(i18n("Loading comets"));
 
     qDeleteAll(m_ObjectList);
     m_ObjectList.clear();
 
     objectNames(SkyObject::COMET).clear();
     objectLists(SkyObject::COMET).clear();
 
     QList<QPair<QString, KSParser::DataTypes>> sequence;
     sequence.append(qMakePair(QString("full name"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("epoch_mjd"), KSParser::D_INT));
     sequence.append(qMakePair(QString("q"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("e"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("i"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("w"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("om"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("tp_calc"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("orbit_id"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("neo"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("M1"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("M2"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("diameter"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("extent"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("albedo"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("rot_period"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("per_y"), KSParser::D_FLOAT));
     sequence.append(qMakePair(QString("moid"), KSParser::D_DOUBLE));
     sequence.append(qMakePair(QString("class"), KSParser::D_QSTRING));
     sequence.append(qMakePair(QString("H"), KSParser::D_SKIP));
     sequence.append(qMakePair(QString("G"), KSParser::D_SKIP));
 
     QString file_name = KSPaths::locate(QStandardPaths::GenericDataLocation, QString("comets.dat"));
     KSParser cometParser(file_name, '#', sequence);
 
     QHash<QString, QVariant> row_content;
     while (cometParser.HasNextRow())
     {
-        KSComet *com = 0;
+        KSComet *com = nullptr;
         row_content  = cometParser.ReadNextRow();
         name         = row_content["full name"].toString();
         name         = name.trimmed();
         mJD          = row_content["epoch_mjd"].toInt();
         q            = row_content["q"].toDouble();
         e            = row_content["e"].toDouble();
         dble_i       = row_content["i"].toDouble();
         dble_w       = row_content["w"].toDouble();
         dble_N       = row_content["om"].toDouble();
         Tp           = row_content["tp_calc"].toDouble();
         orbit_id     = row_content["orbit_id"].toString();
         neo          = row_content["neo"] == "Y";
 
         if (row_content["M1"].toFloat() == 0.0)
             M1 = 101.0;
         else
             M1 = row_content["M1"].toFloat();
 
         if (row_content["M2"].toFloat() == 0.0)
             M2 = 101.0;
         else
             M2 = row_content["M2"].toFloat();
 
         diameter    = row_content["diameter"].toFloat();
         dimensions  = row_content["extent"].toString();
         albedo      = row_content["albedo"].toFloat();
         rot_period  = row_content["rot_period"].toFloat();
         period      = row_content["per_y"].toFloat();
         earth_moid  = row_content["moid"].toDouble();
         orbit_class = row_content["class"].toString();
         K1          = row_content["H"].toFloat();
         K2          = row_content["G"].toFloat();
 
         JD = static_cast<double>(mJD) + 2400000.5;
 
         com = new KSComet(name, QString(), JD, q, e, dms(dble_i), dms(dble_w), dms(dble_N), Tp, M1, M2, K1, K2);
         com->setOrbitID(orbit_id);
         com->setNEO(neo);
         com->setDiameter(diameter);
         com->setDimensions(dimensions);
         com->setAlbedo(albedo);
         com->setRotationPeriod(rot_period);
         com->setPeriod(period);
         com->setEarthMOID(earth_moid);
         com->setOrbitClass(orbit_class);
         com->setAngularSize(0.005);
         m_ObjectList.append(com);
 
         // Add *short* name to the list of object names
         objectNames(SkyObject::COMET).append(com->name());
         objectLists(SkyObject::COMET).append(QPair<QString, const SkyObject *>(com->name(), com));
     }
 }
 
 void CometsComponent::draw(SkyPainter *skyp)
 {
     Q_UNUSED(skyp)
 #ifndef KSTARS_LITE
     if (!selected() || Options::zoomFactor() < 10 * MINZOOM)
         return;
 
     bool hideLabels       = !Options::showCometNames() || (SkyMap::Instance()->isSlewing() && Options::hideLabels());
     double rsunLabelLimit = Options::maxRadCometName();
 
     //FIXME: Should these be config'able?
     skyp->setPen(QPen(QColor("transparent")));
     skyp->setBrush(QBrush(QColor("white")));
 
     foreach (SkyObject *so, m_ObjectList)
     {
         KSComet *com = (KSComet *)so;
         double mag   = com->mag();
         if (std::isnan(mag) == 0)
         {
             bool drawn = skyp->drawComet(com);
             if (drawn && !(hideLabels || com->rsun() >= rsunLabelLimit))
                 SkyLabeler::AddLabel(com, SkyLabeler::COMET_LABEL);
         }
     }
 #endif
 }
 
 void CometsComponent::updateDataFile()
 {
     downloadJob = new FileDownloader();
 
     downloadJob->setProgressDialogEnabled(true, i18n("Comets Update"), i18n("Downloading comets updates..."));
     downloadJob->registerDataVerification([&](const QByteArray &data) { return data.startsWith("full_name");});
 
     connect(downloadJob, SIGNAL(downloaded()), this, SLOT(downloadReady()));
     connect(downloadJob, SIGNAL(error(QString)), this, SLOT(downloadError(QString)));
 
     QUrl url             = QUrl("https://ssd.jpl.nasa.gov/sbdb_query.cgi");
     QByteArray post_data = KSUtils::getJPLQueryString("com", "AcBdBiBgBjBlBkBqBbAgAkAlApAqArAsBsBtChAmAn",
                                                       QVector<KSUtils::JPLFilter>{ { "Af", "!=", "D" } });
 
     downloadJob->post(url, post_data);
 }
 
 void CometsComponent::downloadReady()
 {
     // Comment the first line
     QByteArray data = downloadJob->downloadedData();
     data.insert(0, '#');
 
     // Write data to asteroids.dat
     QFile file(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "comets.dat");
     file.open(QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text);
     file.write(data);
     file.close();
 
     // Reload asteroids
     loadData();
 
 #ifdef KSTARS_LITE
     KStarsLite::Instance()->data()->setFullTimeUpdate();
 #else
     KStars::Instance()->data()->setFullTimeUpdate();
 #endif
 
     downloadJob->deleteLater();
 }
 
 void CometsComponent::downloadError(const QString &errorString)
 {
 #ifndef KSTARS_LITE
-    KMessageBox::error(0, i18n("Error downloading asteroids data: %1", errorString));
+    KMessageBox::error(nullptr, i18n("Error downloading asteroids data: %1", errorString));
 #else
     qDebug() << i18n("Error downloading comets data: %1", errorString);
 #endif
     downloadJob->deleteLater();
 }
diff --git a/kstars/skycomponents/constellationboundarylines.cpp b/kstars/skycomponents/constellationboundarylines.cpp
index 41a003827..214262615 100644
--- a/kstars/skycomponents/constellationboundarylines.cpp
+++ b/kstars/skycomponents/constellationboundarylines.cpp
@@ -1,291 +1,291 @@
 /***************************************************************************
                  constellationboundarylines.cpp -  K Desktop Planetarium
                              -------------------
     begin                : 25 Oct. 2005
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "constellationboundarylines.h"
 
 #include "ksfilereader.h"
 #include "kstarsdata.h"
 #include "linelist.h"
 #include "Options.h"
 #include "polylist.h"
 #ifdef KSTARS_LITE
 #include "skymaplite.h"
 #else
 #include "skymap.h"
 #endif
 #include "skypainter.h"
 #include "htmesh/MeshIterator.h"
 #include "skycomponents/skymapcomposite.h"
 
 #include <QHash>
 
 ConstellationBoundaryLines::ConstellationBoundaryLines(SkyComposite *parent)
     : NoPrecessIndex(parent, i18n("Constellation Boundaries"))
 {
     m_skyMesh      = SkyMesh::Instance();
     m_polyIndexCnt = 0;
     for (int i = 0; i < m_skyMesh->size(); i++)
     {
         m_polyIndex.append(std::shared_ptr<PolyListList>(new PolyListList()));
     }
 
     KStarsData *data = KStarsData::Instance();
     int verbose      = 0; // -1 => create cbounds-$x.idx on stdout
     //  0 => normal
     const char *fname = "cbounds.dat";
     int flag = 0;
     double ra, dec = 0, lastRa, lastDec;
     std::shared_ptr<LineList> lineList;
     std::shared_ptr<PolyList> polyList;
     bool ok = false;
 
     intro();
 
     // Open the .idx file and skip past the first line
-    KSFileReader idxReader, *idxFile = 0;
+    KSFileReader idxReader, *idxFile = nullptr;
     QString idxFname = QString("cbounds-%1.idx").arg(SkyMesh::Instance()->level());
     if (idxReader.open(idxFname))
     {
         idxReader.readLine();
         idxFile = &idxReader;
     }
 
     // now open the file that contains the points
     KSFileReader fileReader;
     if (!fileReader.open(fname))
         return;
 
     fileReader.setProgress(i18n("Loading Constellation Boundaries"), 13124, 10);
 
     lastRa = lastDec = -1000.0;
 
     while (fileReader.hasMoreLines())
     {
         QString line = fileReader.readLine();
         fileReader.showProgress();
 
         if (line.at(0) == '#')
             continue;          // ignore comments
         if (line.at(0) == ':') // :constellation line
         {
             if (lineList.get())
                 appendLine(lineList);
             lineList.reset();
 
             if (polyList.get())
                 appendPoly(polyList, idxFile, verbose);
             QString cName = line.mid(1);
             polyList.reset(new PolyList(cName));
             if (verbose == -1)
                 printf(":\n");
             lastRa = lastDec = -1000.0;
             continue;
         }
 
         // read in the data from the line
         ra = line.midRef(0, 12).toDouble(&ok);
         if (ok)
             dec = line.midRef(13, 12).toDouble(&ok);
         if (ok)
             flag = line.midRef(26, 1).toInt(&ok);
         if (!ok)
         {
             fprintf(stderr, "%s: conversion error on line: %d\n", fname, fileReader.lineNumber());
             continue;
         }
 
         if (ra == lastRa && dec == lastDec)
         {
             fprintf(stderr, "%s: tossing dupe on line %4d: (%f, %f)\n", fname, fileReader.lineNumber(), ra, dec);
             continue;
         }
 
         // always add the point to the boundary (and toss dupes)
 
         // By the time we come here, we should have polyList. Else we aren't doing good
         Q_ASSERT(polyList); // Is this the right fix?
 
         polyList->append(QPointF(ra, dec));
         if (ra < 0)
             polyList->setWrapRA(true);
 
         if (flag)
         {
             if (!lineList.get())
                 lineList.reset(new LineList());
 
             std::shared_ptr<SkyPoint> point(new SkyPoint(ra, dec));
 
             point->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             lineList->append(std::move(point));
             lastRa  = ra;
             lastDec = dec;
         }
         else
         {
             if (lineList.get())
                 appendLine(lineList);
             lineList.reset();
             lastRa = lastDec = -1000.0;
         }
     }
 
     if (lineList.get())
         appendLine(lineList);
     if (polyList.get())
         appendPoly(polyList, idxFile, verbose);
 }
 
 ConstellationBoundaryLines::~ConstellationBoundaryLines()
 {
 }
 
 bool ConstellationBoundaryLines::selected()
 {
 #ifndef KSTARS_LITE
     return Options::showCBounds() && !(Options::hideOnSlew() && Options::hideCBounds() && SkyMap::IsSlewing());
 #else
     return Options::showCBounds() && !(Options::hideOnSlew() && Options::hideCBounds() && SkyMapLite::IsSlewing());
 #endif
 }
 
 void ConstellationBoundaryLines::preDraw(SkyPainter *skyp)
 {
     QColor color = KStarsData::Instance()->colorScheme()->colorNamed("CBoundColor");
     skyp->setPen(QPen(QBrush(color), 1, Qt::SolidLine));
 }
 
 void ConstellationBoundaryLines::appendPoly(std::shared_ptr<PolyList> &polyList, KSFileReader *file, int debug)
 {
     if (!file || debug == -1)
         return appendPoly(polyList, debug);
 
     while (file->hasMoreLines())
     {
         QString line = file->readLine();
         if (line.at(0) == ':')
             return;
         Trixel trixel = line.toInt();
 
         m_polyIndex[trixel]->append(polyList);
     }
 }
 
 void ConstellationBoundaryLines::appendPoly(const std::shared_ptr<PolyList> &polyList, int debug)
 {
     if (debug >= 0 && debug < m_skyMesh->debug())
         debug = m_skyMesh->debug();
 
     const IndexHash &indexHash     = m_skyMesh->indexPoly(polyList->poly());
     IndexHash::const_iterator iter = indexHash.constBegin();
     while (iter != indexHash.constEnd())
     {
         Trixel trixel = iter.key();
         iter++;
 
         if (debug == -1)
             printf("%d\n", trixel);
 
         m_polyIndex[trixel]->append(polyList);
     }
 
     if (debug > 9)
         printf("PolyList: %3d: %d\n", ++m_polyIndexCnt, indexHash.size());
 }
 
 PolyList *ConstellationBoundaryLines::ContainingPoly(SkyPoint *p)
 {
     //printf("called ContainingPoly(p)\n");
 
     // we save the pointers in a hash because most often there is only one
     // constellation and we can avoid doing the expensive boundary calculations
     // and just return it if we know it is unique.  We can avoid this minor
     // complication entirely if we use index(p) instead of aperture(p, r)
     // because index(p) always returns a single trixel index.
 
     QHash<PolyList *, bool> polyHash;
     QHash<PolyList *, bool>::const_iterator iter;
 
     //printf("\n");
 
     // the boundaries don't precess so we use index() not aperture()
     m_skyMesh->index(p, 1.0, IN_CONSTELL_BUF);
     MeshIterator region(m_skyMesh, IN_CONSTELL_BUF);
     while (region.hasNext())
     {
         Trixel trixel = region.next();
         //printf("Trixel: %4d %s\n", trixel, m_skyMesh->indexToName( trixel ) );
 
         std::shared_ptr<PolyListList> polyListList = m_polyIndex[trixel];
 
         //printf("    size: %d\n", polyListList->size() );
 
         for (int i = 0; i < polyListList->size(); i++)
         {
             polyHash.insert(polyListList->at(i).get(), true);
         }
     }
 
     iter = polyHash.constBegin();
 
     // Don't bother with boundaries if there is only one
     if (polyHash.size() == 1)
         return iter.key();
 
     QPointF point(p->ra().Hours(), p->dec().Degrees());
     QPointF wrapPoint(p->ra().Hours() - 24.0, p->dec().Degrees());
     bool wrapRA = p->ra().Hours() > 12.0;
 
     while (iter != polyHash.constEnd())
     {
         PolyList *polyList = iter.key();
         iter++;
 
         //qDebug() << QString("checking %1 boundary\n").arg( polyList->name() );
 
         const QPolygonF *poly = polyList->poly();
         if (wrapRA && polyList->wrapRA())
         {
             if (poly->containsPoint(wrapPoint, Qt::OddEvenFill))
                 return polyList;
         }
         else
         {
             if (poly->containsPoint(point, Qt::OddEvenFill))
                 return polyList;
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 //-------------------------------------------------------------------
 // The routines for providing public access to the boundary index
 // start here.  (Some of them may not be needed (or working)).
 //-------------------------------------------------------------------
 
 QString ConstellationBoundaryLines::constellationName(SkyPoint *p)
 {
     PolyList *polyList = ContainingPoly(p);
     if (polyList)
     {
         return (Options::useLocalConstellNames() ?
                     i18nc("Constellation name (optional)", polyList->name().toUpper().toLocal8Bit().data()) :
                     polyList->name());
     }
     return i18n("Unknown");
 }
diff --git a/kstars/skycomponents/deepskycomponent.cpp b/kstars/skycomponents/deepskycomponent.cpp
index 1ef259d80..a9abbc4a0 100644
--- a/kstars/skycomponents/deepskycomponent.cpp
+++ b/kstars/skycomponents/deepskycomponent.cpp
@@ -1,755 +1,755 @@
 /***************************************************************************
                           deepskycomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/15/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "deepskycomponent.h"
 
 #include "ksfilereader.h"
 #include "kspaths.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #include "skylabeler.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #endif
 #include "skymesh.h"
 #include "skypainter.h"
 #include "htmesh/MeshIterator.h"
 #include "projections/projector.h"
 #include "skyobjects/deepskyobject.h"
 
 DeepSkyComponent::DeepSkyComponent(SkyComposite *parent) : SkyComponent(parent)
 {
     m_skyMesh = SkyMesh::Instance();
     // Add labels
     for (int i = 0; i <= MAX_LINENUMBER_MAG; i++)
         m_labelList[i] = new LabelList;
     loadData();
 }
 
 DeepSkyComponent::~DeepSkyComponent()
 {
     clearList(m_MessierList);
     clearList(m_NGCList);
     clearList(m_ICList);
     clearList(m_OtherList);
     qDeleteAll(m_DeepSkyIndex);
     m_DeepSkyIndex.clear();
     qDeleteAll(m_MessierIndex);
     m_MessierIndex.clear();
     qDeleteAll(m_NGCIndex);
     m_NGCIndex.clear();
     qDeleteAll(m_ICIndex);
     m_ICIndex.clear();
     qDeleteAll(m_OtherIndex);
     m_OtherIndex.clear();
     for (int i = 0; i <= MAX_LINENUMBER_MAG; i++)
         delete m_labelList[i];
 }
 
 bool DeepSkyComponent::selected()
 {
     return Options::showDeepSky();
 }
 
 void DeepSkyComponent::update(KSNumbers *)
 {
 }
 
 void DeepSkyComponent::loadData()
 {
     KStarsData *data = KStarsData::Instance();
     //Check whether we need to concatenate a split NGC/IC catalog
     //(i.e., if user has downloaded the Steinicke catalog)
     mergeSplitFiles();
 
     QList<QPair<QString, KSParser::DataTypes>> sequence;
     QList<int> widths;
     sequence.append(qMakePair(QString("Flag"), KSParser::D_QSTRING));
     widths.append(1);
 
     sequence.append(qMakePair(QString("ID"), KSParser::D_INT));
     widths.append(4);
 
     sequence.append(qMakePair(QString("suffix"), KSParser::D_QSTRING));
     widths.append(1);
 
     sequence.append(qMakePair(QString("RA_H"), KSParser::D_INT));
     widths.append(2);
 
     sequence.append(qMakePair(QString("RA_M"), KSParser::D_INT));
     widths.append(2);
 
     sequence.append(qMakePair(QString("RA_S"), KSParser::D_FLOAT));
     widths.append(4);
 
     sequence.append(qMakePair(QString("D_Sign"), KSParser::D_QSTRING));
     widths.append(2);
 
     sequence.append(qMakePair(QString("Dec_d"), KSParser::D_INT));
     widths.append(2);
 
     sequence.append(qMakePair(QString("Dec_m"), KSParser::D_INT));
     widths.append(2);
 
     sequence.append(qMakePair(QString("Dec_s"), KSParser::D_INT));
     widths.append(2);
 
     sequence.append(qMakePair(QString("BMag"), KSParser::D_QSTRING));
     widths.append(6);
 
     sequence.append(qMakePair(QString("type"), KSParser::D_INT));
     widths.append(2);
 
     sequence.append(qMakePair(QString("a"), KSParser::D_FLOAT));
     widths.append(6);
 
     sequence.append(qMakePair(QString("b"), KSParser::D_FLOAT));
     widths.append(6);
 
     sequence.append(qMakePair(QString("pa"), KSParser::D_QSTRING));
     widths.append(4);
 
     sequence.append(qMakePair(QString("PGC"), KSParser::D_INT));
     widths.append(7);
 
     sequence.append(qMakePair(QString("other cat"), KSParser::D_QSTRING));
     widths.append(4);
 
     sequence.append(qMakePair(QString("other1"), KSParser::D_QSTRING));
     widths.append(6);
 
     sequence.append(qMakePair(QString("other2"), KSParser::D_QSTRING));
     widths.append(6);
 
     sequence.append(qMakePair(QString("Messr"), KSParser::D_QSTRING));
     widths.append(2);
 
     sequence.append(qMakePair(QString("MessrNum"), KSParser::D_INT));
     widths.append(4);
 
     sequence.append(qMakePair(QString("Longname"), KSParser::D_QSTRING));
     //No width to be appended for last sequence object
 
     QString file_name = KSPaths::locate(QStandardPaths::GenericDataLocation, QString("ngcic.dat"));
     KSParser deep_sky_parser(file_name, '#', sequence, widths);
 
     deep_sky_parser.SetProgress(i18n("Loading NGC/IC objects"), 13444, 10);
     qDebug() << "Loading NGC/IC objects";
 
     QHash<QString, QVariant> row_content;
     while (deep_sky_parser.HasNextRow())
     {
         row_content = deep_sky_parser.ReadNextRow();
 
         QString iflag;
         QString cat;
         iflag = row_content["Flag"].toString().mid(0, 1); //check for NGC/IC catalog flag
         /*
         Q_ASSERT(iflag == "I" || iflag == "N" || iflag == " ");
         // (spacetime): ^ Why an assert? Change in implementation of ksparser
         //  might result in crash for no reason.
         // n.b. We also allow non-NGC/IC objects which have a blank iflag
         */
 
         float mag(1000.0);
         int type, ingc, imess(-1), pa;
         int pgc, ugc;
         QString ss, name, name2, longname;
         QString cat2;
 
         // Designation
         if (iflag == "I")
             cat = "IC";
         else if (iflag == "N")
             cat = "NGC";
 
         ingc = row_content["ID"].toInt(); // NGC/IC catalog number
         if (ingc == 0)
             cat.clear(); //object is not in NGC or IC catalogs
 
         QString suffix = row_content["suffix"].toString(); // multipliticity suffixes, eg: the 'A' in NGC 4945A
 
         Q_ASSERT(suffix.isEmpty() || (suffix.at(0) >= QChar('A') && suffix.at(0) <= QChar('Z')) ||
                  (suffix.at(0) >= QChar('a') && suffix.at(0) <= QChar('z')));
 
         //coordinates
         int rah     = row_content["RA_H"].toInt();
         int ram     = row_content["RA_M"].toInt();
         float ras   = row_content["RA_S"].toFloat();
         QString sgn = row_content["D_Sign"].toString();
         int dd      = row_content["Dec_d"].toInt();
         int dm      = row_content["Dec_m"].toInt();
         int ds      = row_content["Dec_s"].toInt();
 
         if (!((0.0 <= rah && rah < 24.0) || (0.0 <= ram && ram < 60.0) || (0.0 <= ras && ras < 60.0) ||
               (0.0 <= dd && dd <= 90.0) || (0.0 <= dm && dm < 60.0) || (0.0 <= ds && ds < 60.0)))
         {
             qDebug() << "Bad coordinates while processing NGC/IC object: " << cat << ingc;
             qDebug() << "RA H:M:S = " << rah << ":" << ram << ":" << ras << "; Dec D:M:S = " << dd << ":" << dm << ":"
                      << ds;
             Q_ASSERT(false);
         }
 
         //Ignore lines with no coordinate values if not debugging
         if (rah == 0 && ram == 0 && ras == 0)
             continue;
 
         //B magnitude
         ss = row_content["BMag"].toString();
         if (ss.isEmpty())
         {
             mag = 99.9f;
         }
         else
         {
             mag = ss.toFloat();
         }
 
         //object type
         type = row_content["type"].toInt();
 
         //major and minor axes
         float a = row_content["a"].toFloat();
         float b = row_content["b"].toFloat();
 
         //position angle.  The catalog PA is zero when the Major axis
         //is horizontal.  But we want the angle measured from North, so
         //we set PA = 90 - pa.
         ss = row_content["pa"].toString();
         if (ss.isEmpty())
         {
             pa = 90;
         }
         else
         {
             pa = 90 - ss.toInt();
         }
 
         //PGC number
         pgc = row_content["PGC"].toInt();
 
         //UGC number
         if (row_content["other cat"].toString().trimmed() == "UGC")
         {
             ugc = row_content["other1"].toString().toInt();
         }
         else
         {
             ugc = 0;
         }
 
         //Messier number
         if (row_content["Messr"].toString().trimmed() == "M")
         {
             cat2 = cat;
             if (ingc == 0)
                 cat2.clear();
             cat   = 'M';
             imess = row_content["MessrNum"].toInt();
         }
 
         longname = row_content["Longname"].toString();
 
         dms r;
         r.setH(rah, ram, int(ras));
         dms d(dd, dm, ds);
 
         if (sgn == "-")
         {
             d.setD(-1.0 * d.Degrees());
         }
 
         bool hasName = true;
         QString snum;
         if (cat == "IC" || cat == "NGC")
         {
             snum.setNum(ingc);
             name = cat + ' ' + ((suffix.isEmpty()) ? snum : (snum + suffix));
         }
         else if (cat == "M")
         {
             snum.setNum(imess);
             name = cat + ' ' + snum; // Note: Messier has no suffixes
             if (cat2 == "NGC" || cat2 == "IC")
             {
                 snum.setNum(ingc);
                 name2 = cat2 + ' ' + ((suffix.isEmpty()) ? snum : (snum + suffix));
             }
             else
             {
                 name2.clear();
             }
         }
         else
         {
             if (!longname.isEmpty())
                 name = longname;
             else
             {
                 hasName = false;
                 name    = i18n("Unnamed Object");
             }
         }
 
         name = i18nc("object name (optional)", name.toLatin1().constData());
         if (!longname.isEmpty())
             longname = i18nc("object name (optional)", longname.toLatin1().constData());
 
         // create new deepskyobject
-        DeepSkyObject *o = 0;
+        DeepSkyObject *o = nullptr;
         if (type == 0)
             type = 1; //Make sure we use CATALOG_STAR, not STAR
         o = new DeepSkyObject(type, r, d, mag, name, name2, longname, cat, a, b, pa, pgc, ugc);
         o->EquatorialToHorizontal(data->lst(), data->geo()->lat());
 
         // Add the name(s) to the nameHash for fast lookup -jbb
         if (hasName)
         {
             nameHash[name.toLower()] = o;
             if (!longname.isEmpty())
                 nameHash[longname.toLower()] = o;
             if (!name2.isEmpty())
                 nameHash[name2.toLower()] = o;
         }
 
         Trixel trixel = m_skyMesh->index(o);
 
         //Assign object to general DeepSkyObjects list,
         //and a secondary list based on its catalog.
         m_DeepSkyList.append(o);
         appendIndex(o, &m_DeepSkyIndex, trixel);
 
         if (o->isCatalogM())
         {
             m_MessierList.append(o);
             appendIndex(o, &m_MessierIndex, trixel);
         }
         else if (o->isCatalogNGC())
         {
             m_NGCList.append(o);
             appendIndex(o, &m_NGCIndex, trixel);
         }
         else if (o->isCatalogIC())
         {
             m_ICList.append(o);
             appendIndex(o, &m_ICIndex, trixel);
         }
         else
         {
             m_OtherList.append(o);
             appendIndex(o, &m_OtherIndex, trixel);
         }
 
         // JM: VERY INEFFICIENT. Disabling for now until we figure out how to deal with dups. QSet?
         //if ( ! name.isEmpty() && !objectNames(type).contains(name))
         if (!name.isEmpty())
         {
             objectNames(type).append(name);
             objectLists(type).append(QPair<QString, SkyObject *>(name, o));
         }
 
         //Add long name to the list of object names
         //if ( ! longname.isEmpty() && longname != name  && !objectNames(type).contains(longname))
         if (!longname.isEmpty() && longname != name)
         {
             objectNames(type).append(longname);
             objectLists(type).append(QPair<QString, SkyObject *>(longname, o));
         }
 
         deep_sky_parser.ShowProgress();
     }
 
     for (auto &list : objectNames())
         list.removeDuplicates();
 }
 
 void DeepSkyComponent::mergeSplitFiles()
 {
     //If user has downloaded the Steinicke NGC/IC catalog, then it is
     //split into multiple files.  Concatenate these into a single file.
     QString firstFile = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "ngcic01.dat";
     if (!QFile::exists(firstFile))
         return;
     QDir localDir        = QFileInfo(firstFile).absoluteDir();
     QStringList catFiles = localDir.entryList(QStringList("ngcic??.dat"));
 
     qDebug() << "Merging split NGC/IC files" << endl;
 
     QString buffer;
     for (auto &fname : catFiles)
     {
         QFile f(localDir.absoluteFilePath(fname));
         if (f.open(QIODevice::ReadOnly))
         {
             QTextStream stream(&f);
             buffer += stream.readAll();
 
             f.close();
         }
         else
         {
             qDebug() << QString("Error: Could not open %1 for reading").arg(fname) << endl;
         }
     }
 
     QFile fout(localDir.absoluteFilePath("ngcic.dat"));
     if (fout.open(QIODevice::WriteOnly))
     {
         QTextStream oStream(&fout);
         oStream << buffer;
         fout.close();
 
         //Remove the split-files
         foreach (const QString &fname, catFiles)
         {
             QString fullname = localDir.absoluteFilePath(fname);
             //DEBUG
             qDebug() << "Removing " << fullname << " ..." << endl;
             QFile::remove(fullname);
         }
     }
 }
 
 void DeepSkyComponent::appendIndex(DeepSkyObject *o, DeepSkyIndex *dsIndex, Trixel trixel)
 {
     if (!dsIndex->contains(trixel))
     {
         dsIndex->insert(trixel, new DeepSkyList());
     }
     dsIndex->value(trixel)->append(o);
 }
 
 void DeepSkyComponent::draw(SkyPainter *skyp)
 {
 #ifndef KSTARS_LITE
     if (!selected())
         return;
 
     bool drawFlag;
 
     drawFlag = Options::showMessier() && !(Options::hideOnSlew() && Options::hideMessier() && SkyMap::IsSlewing());
 
     drawDeepSkyCatalog(skyp, drawFlag, &m_MessierIndex, "MessColor", Options::showMessierImages() && !Options::showHIPS());
 
     drawFlag = Options::showNGC() && !(Options::hideOnSlew() && Options::hideNGC() && SkyMap::IsSlewing());
 
     drawDeepSkyCatalog(skyp, drawFlag, &m_NGCIndex, "NGCColor");
 
     drawFlag = Options::showIC() && !(Options::hideOnSlew() && Options::hideIC() && SkyMap::IsSlewing());
 
     drawDeepSkyCatalog(skyp, drawFlag, &m_ICIndex, "ICColor");
 
     drawFlag = Options::showOther() && !(Options::hideOnSlew() && Options::hideOther() && SkyMap::IsSlewing());
 
     drawDeepSkyCatalog(skyp, drawFlag, &m_OtherIndex, "NGCColor");
 #else
     Q_UNUSED(skyp)
 #endif
 }
 
 void DeepSkyComponent::drawDeepSkyCatalog(SkyPainter *skyp, bool drawObject, DeepSkyIndex *dsIndex,
                                           const QString &colorString, bool drawImage)
 {
 #ifndef KSTARS_LITE
     if (!(drawObject || drawImage))
         return;
 
     SkyMap *map           = SkyMap::Instance();
     const Projector *proj = map->projector();
     KStarsData *data      = KStarsData::Instance();
 
     UpdateID updateID    = data->updateID();
     UpdateID updateNumID = data->updateNumID();
 
     skyp->setPen(data->colorScheme()->colorNamed(colorString));
     skyp->setBrush(Qt::NoBrush);
 
     m_hideLabels = (map->isSlewing() && Options::hideOnSlew()) ||
                    !(Options::showDeepSkyMagnitudes() || Options::showDeepSkyNames());
 
     double maglim              = Options::magLimitDrawDeepSky();
     bool showUnknownMagObjects = Options::showUnknownMagObjects();
 
     //adjust maglimit for ZoomLevel
     double lgmin = log10(MINZOOM);
     double lgmax = log10(MAXZOOM);
     double lgz   = log10(Options::zoomFactor());
     if (lgz <= 0.75 * lgmax)
         maglim -= (Options::magLimitDrawDeepSky() - Options::magLimitDrawDeepSkyZoomOut()) * (0.75 * lgmax - lgz) /
                   (0.75 * lgmax - lgmin);
     m_zoomMagLimit = maglim;
 
     double labelMagLim = Options::deepSkyLabelDensity();
     labelMagLim += (Options::magLimitDrawDeepSky() - labelMagLim) * (lgz - lgmin) / (lgmax - lgmin);
     if (labelMagLim > Options::magLimitDrawDeepSky())
         labelMagLim = Options::magLimitDrawDeepSky();
 
     //DrawID drawID = m_skyMesh->drawID();
     MeshIterator region(m_skyMesh, DRAW_BUF);
 
     while (region.hasNext())
     {
         Trixel trixel       = region.next();
         DeepSkyList *dsList = dsIndex->value(trixel);
-        if (dsList == 0)
+        if (dsList == nullptr)
             continue;
         for (int j = 0; j < dsList->size(); j++)
         {
             DeepSkyObject *obj = dsList->at(j);
 
             //if ( obj->drawID == drawID ) continue;  // only draw each line once
             //obj->drawID = drawID;
 
             if (obj->updateID != updateID)
             {
                 obj->updateID = updateID;
                 if (obj->updateNumID != updateNumID)
                 {
                     obj->updateCoords(data->updateNum());
                 }
                 obj->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             }
 
             float mag  = obj->mag();
             float size = obj->a() * dms::PI * Options::zoomFactor() / 10800.0;
 
             //only draw objects if flags set, it's bigger than 1 pixel (unless
             //zoom > 2000.), and it's brighter than maglim (unless mag is
             //undefined (=99.9)
             bool sizeCriterion = (size > 1.0 || Options::zoomFactor() > 2000.);
             bool magCriterion  = (mag < (float)maglim) || (showUnknownMagObjects && (std::isnan(mag) || mag > 36.0));
             if (sizeCriterion && magCriterion)
             {
                 bool drawn = skyp->drawDeepSkyObject(obj, drawImage);
                 if (drawn && !(m_hideLabels || mag > labelMagLim))
                     addLabel(proj->toScreen(obj), obj);
                 //FIXME: find a better way to do above
             }
         }
     }
 #else
     Q_UNUSED(skyp)
     Q_UNUSED(drawObject)
     Q_UNUSED(dsIndex)
     Q_UNUSED(colorString)
     Q_UNUSED(drawImage)
 #endif
 }
 
 void DeepSkyComponent::addLabel(const QPointF &p, DeepSkyObject *obj)
 {
     int idx = int(obj->mag() * 10.0);
     if (idx < 0)
         idx = 0;
     if (idx > MAX_LINENUMBER_MAG)
         idx = MAX_LINENUMBER_MAG;
     m_labelList[idx]->append(SkyLabel(p, obj));
 }
 
 void DeepSkyComponent::drawLabels()
 {
 #ifndef KSTARS_LITE
     if (m_hideLabels)
         return;
 
     SkyLabeler *labeler = SkyLabeler::Instance();
     labeler->setPen(QColor(KStarsData::Instance()->colorScheme()->colorNamed("DSNameColor")));
 
     int max = int(m_zoomMagLimit * 10.0);
     if (max < 0)
         max = 0;
     if (max > MAX_LINENUMBER_MAG)
         max = MAX_LINENUMBER_MAG;
 
     for (int i = 0; i <= max; i++)
     {
         LabelList *list = m_labelList[i];
         for (int j = 0; j < list->size(); j++)
         {
             labeler->drawNameLabel(list->at(j).obj, list->at(j).o);
         }
         list->clear();
     }
 #endif
 }
 
 SkyObject *DeepSkyComponent::findByName(const QString &name)
 {
     return nameHash[name.toLower()];
 }
 
 void DeepSkyComponent::objectsInArea(QList<SkyObject *> &list, const SkyRegion &region)
 {
     for (SkyRegion::const_iterator it = region.constBegin(); it != region.constEnd(); ++it)
     {
         Trixel trixel = it.key();
         if (m_DeepSkyIndex.contains(trixel))
         {
             DeepSkyList *dsoList = m_DeepSkyIndex.value(trixel);
             for (DeepSkyList::iterator dsit = dsoList->begin(); dsit != dsoList->end(); ++dsit)
                 list.append(*dsit);
         }
     }
 }
 
 //we multiply each catalog's smallest angular distance by the
 //following factors before selecting the final nearest object:
 // IC catalog = 0.8
 // NGC catalog = 0.5
 // "other" catalog = 0.4
 // Messier object = 0.25
 SkyObject *DeepSkyComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
     if (!selected())
-        return 0;
+        return nullptr;
 
-    SkyObject *oTry  = 0;
-    SkyObject *oBest = 0;
+    SkyObject *oTry  = nullptr;
+    SkyObject *oBest = nullptr;
     double rTry      = maxrad;
     double rBest     = maxrad;
     double r;
     DeepSkyList *dsList;
     SkyObject *obj;
 
     MeshIterator region(m_skyMesh, OBJ_NEAREST_BUF);
     while (region.hasNext())
     {
         dsList = m_ICIndex[region.next()];
         if (!dsList)
             continue;
         for (int i = 0; i < dsList->size(); ++i)
         {
             obj = dsList->at(i);
             r   = obj->angularDistanceTo(p).Degrees();
             if (r < rTry)
             {
                 rTry = r;
                 oTry = obj;
             }
         }
     }
 
     rTry *= 0.8;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
     region.reset();
     while (region.hasNext())
     {
         dsList = m_NGCIndex[region.next()];
         if (!dsList)
             continue;
         for (int i = 0; i < dsList->size(); ++i)
         {
             obj = dsList->at(i);
             r   = obj->angularDistanceTo(p).Degrees();
             if (r < rTry)
             {
                 rTry = r;
                 oTry = obj;
             }
         }
     }
 
     rTry *= 0.6;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
 
     region.reset();
     while (region.hasNext())
     {
         dsList = m_OtherIndex[region.next()];
         if (!dsList)
             continue;
         for (int i = 0; i < dsList->size(); ++i)
         {
             obj = dsList->at(i);
             r   = obj->angularDistanceTo(p).Degrees();
             if (r < rTry)
             {
                 rTry = r;
                 oTry = obj;
             }
         }
     }
 
     rTry *= 0.6;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
 
     region.reset();
     while (region.hasNext())
     {
         dsList = m_MessierIndex[region.next()];
         if (!dsList)
             continue;
         for (int i = 0; i < dsList->size(); ++i)
         {
             obj = dsList->at(i);
             r   = obj->angularDistanceTo(p).Degrees();
             if (r < rTry)
             {
                 rTry = r;
                 oTry = obj;
             }
         }
     }
 
     // -jbb: this is the template of the non-indexed way
     //
     //foreach ( SkyObject *o, m_MessierList ) {
     //  r = o->angularDistanceTo( p ).Degrees();
     //  if ( r < rTry ) {
     //          rTry = r;
     //          oTry = o;
     //  }
     //}
 
     rTry *= 0.5;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     maxrad = rBest;
     return oBest;
 }
 
 void DeepSkyComponent::clearList(QList<DeepSkyObject *> &list)
 {
     while (!list.isEmpty())
     {
         SkyObject *o = list.takeFirst();
         removeFromNames(o);
         delete o;
     }
 }
diff --git a/kstars/skycomponents/deepskycomponent.h b/kstars/skycomponents/deepskycomponent.h
index 2d51a3e68..bb542d325 100644
--- a/kstars/skycomponents/deepskycomponent.h
+++ b/kstars/skycomponents/deepskycomponent.h
@@ -1,169 +1,169 @@
 /***************************************************************************
                           deepskycomponent.h  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/15/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "skycomponent.h"
 #include "skylabel.h"
 
 class QPointF;
 
 #ifdef KSTARS_LITE
 class DeepSkyItem;
 #endif
 class DeepSkyObject;
 class KSNumbers;
 class SkyMap;
 class SkyMesh;
 class SkyPoint;
 
 // NOTE: Although the following symbol has nothing to do with line
 // number in any file, we use this name to keep consistency in naming
 // conventions with StarComponent
 #define MAX_LINENUMBER_MAG 90
 
 typedef QVector<DeepSkyObject *> DeepSkyList;
 typedef QHash<int, DeepSkyList *> DeepSkyIndex;
 
 /**
  * @class DeepSkyComponent
  * Represents the deep sky objects separated by catalogs.
  * Custom Catalogs are a standalone component.
  * @note this Component is similar to ListComponent, but
  * the deep sky objects are stored in four separate QLists.
  * @author Thomas Kabelmann
  * @version 0.1
  */
 class DeepSkyComponent : public SkyComponent
 {
 #ifdef KSTARS_LITE
     friend class DeepSkyItem;
 #endif
 
   public:
     explicit DeepSkyComponent(SkyComposite *);
 
     ~DeepSkyComponent() override;
 
     void draw(SkyPainter *skyp) override;
 
     /**
      * @short draw all the labels in the prioritized LabelLists and then
      * clear the LabelLists.
      */
     void drawLabels();
 
     /**
      * @short Update the sky positions of this component.  FIXME -jbb does nothing now
      *
      * This function usually just updates the Horizontal (Azimuth/Altitude) coordinates of the
      * objects in this component.  If the KSNumbers argument is not nullptr, this function also
      * recomputes precession and nutation for the date in KSNumbers.
      * @p num Pointer to the KSNumbers object
      * @note By default, the num parameter is nullptr, indicating that Precession/Nutation
      * computation should be skipped; this computation is only occasionally required.
      */
-    void update(KSNumbers *num = 0) override;
+    void update(KSNumbers *num = nullptr) override;
 
     /**
      * @short Search the children of this SkyComponent for a SkyObject whose name matches the argument
      * @p name the name to be matched
      * @return a pointer to the SkyObject whose name matches the argument, or a nullptr pointer
      * if no match was found.
      */
     SkyObject *findByName(const QString &name) override;
 
     /**
      * @short Searches the region(s) and appends the SkyObjects found to the list of sky objects
      *
      * Look for a SkyObject that is in one of the regions
      * If found, then append to the list of sky objects
      * @p list list of SkyObject to which matching list has to be appended to
      * @p region defines the regions in which the search for SkyObject should be done within
      * @return void
      */
     void objectsInArea(QList<SkyObject *> &list, const SkyRegion &region) override;
 
     SkyObject *objectNearest(SkyPoint *p, double &maxrad) override;
 
     const QList<DeepSkyObject *> &objectList() const { return m_DeepSkyList; }
 
     bool selected() override;
 
   private:
     /**
      * @short Read the ngcic.dat deep-sky database.
      * Parse all lines from the deep-sky object catalog files. Construct a DeepSkyObject
      * from the data in each line, and add it to the DeepSkyComponent.
      *
      * Each line in the file is parsed according to column position:
      * @li 0        IC indicator [char]  If 'I' then IC object; if ' ' then NGC object
      * @li 1-4      Catalog number [int]  The NGC/IC catalog ID number
      * @li 6-8      Constellation code (IAU abbreviation)
      * @li 10-11    RA hours [int]
      * @li 13-14    RA minutes [int]
      * @li 16-19    RA seconds [float]
      * @li 21       Dec sign [char; '+' or '-']
      * @li 22-23    Dec degrees [int]
      * @li 25-26    Dec minutes [int]
      * @li 28-29    Dec seconds [int]
      * @li 31       Type ID [int]  Indicates object type; see TypeName array in kstars.cpp
      * @li 33-36    Type details [string] (not yet used)
      * @li 38-41    Magnitude [float] can be blank
      * @li 43-48    Major axis length, in arcmin [float] can be blank
      * @li 50-54    Minor axis length, in arcmin [float] can be blank
      * @li 56-58    Position angle, in degrees [int] can be blank
      * @li 60-62    Messier catalog number [int] can be blank
      * @li 64-69    PGC Catalog number [int] can be blank
      * @li 71-75    UGC Catalog number [int] can be blank
      * @li 77-END   Common name [string] can be blank
      * @return true if data file is successfully read.
      */
     void loadData();
 
     void clearList(QList<DeepSkyObject *> &list);
 
     void mergeSplitFiles();
 
     void drawDeepSkyCatalog(SkyPainter *skyp, bool drawObject, DeepSkyIndex *dsIndex, const QString &colorString,
                             bool drawImage = false);
 
     QList<DeepSkyObject *> m_DeepSkyList;
 
     QList<DeepSkyObject *> m_MessierList;
     QList<DeepSkyObject *> m_NGCList;
     QList<DeepSkyObject *> m_ICList;
     QList<DeepSkyObject *> m_OtherList;
 
     LabelList *m_labelList[MAX_LINENUMBER_MAG + 1];
     bool m_hideLabels { false };
     double m_zoomMagLimit { 0 };
 
     SkyMesh *m_skyMesh { nullptr };
     DeepSkyIndex m_DeepSkyIndex;
     DeepSkyIndex m_MessierIndex;
     DeepSkyIndex m_NGCIndex;
     DeepSkyIndex m_ICIndex;
     DeepSkyIndex m_OtherIndex;
 
     void appendIndex(DeepSkyObject *o, DeepSkyIndex *dsIndex, Trixel trixel);
 
     QHash<QString, DeepSkyObject *> nameHash;
 
     /** @short adds a label to the lists of labels to be drawn prioritized by magnitude. */
     void addLabel(const QPointF &p, DeepSkyObject *obj);
 };
diff --git a/kstars/skycomponents/deepstarcomponent.cpp b/kstars/skycomponents/deepstarcomponent.cpp
index 0e45980c7..172f660e4 100644
--- a/kstars/skycomponents/deepstarcomponent.cpp
+++ b/kstars/skycomponents/deepstarcomponent.cpp
@@ -1,659 +1,659 @@
 /***************************************************************************
                         deepstarcomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Fri 1st Aug 2008
     copyright            : (C) 2008 Akarsh Simha, Thomas Kabelmann
     email                : akarshsimha@gmail.com, thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "deepstarcomponent.h"
 
 #include "byteorder.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #endif
 #include "skymesh.h"
 #include "skypainter.h"
 #include "starblock.h"
 #include "starcomponent.h"
 #include "htmesh/MeshIterator.h"
 #include "projections/projector.h"
 
 #include <qplatformdefs.h>
 #include <QtConcurrent>
 
 #include <kstars_debug.h>
 
 #ifdef _WIN32
 #include <windows.h>
 #endif
 
 DeepStarComponent::DeepStarComponent(SkyComposite *parent, QString fileName, float trigMag, bool staticstars)
     : ListComponent(parent), m_reindexNum(J2000), triggerMag(trigMag), m_FaintMagnitude(-5.0), staticStars(staticstars),
       dataFileName(fileName)
 {
     fileOpened = false;
     openDataFile();
     if (staticStars)
         loadStaticStars();
     qCInfo(KSTARS) << "Loaded DSO catalog file: " << dataFileName;
 }
 
 DeepStarComponent::~DeepStarComponent()
 {
     if (fileOpened)
         starReader.closeFile();
     fileOpened = false;
 }
 
 bool DeepStarComponent::loadStaticStars()
 {
     FILE *dataFile;
 
     if (!staticStars)
         return true;
     if (!fileOpened)
         return false;
 
     dataFile = starReader.getFileHandle();
     rewind(dataFile);
 
     if (!starReader.readHeader())
     {
         qCCritical(KSTARS) << "Error reading header of catalog file " << dataFileName << ": " << starReader.getErrorNumber()
                  << ": " << starReader.getError() << endl;
         return false;
     }
 
     quint8 recordSize = starReader.guessRecordSize();
 
     if (recordSize != 16 && recordSize != 32)
     {
         qCCritical(KSTARS) << "Cannot understand catalog file " << dataFileName << endl;
         return false;
     }
 
     //KDE_fseek(dataFile, starReader.getDataOffset(), SEEK_SET);
     QT_FSEEK(dataFile, starReader.getDataOffset(), SEEK_SET);
 
     qint16 faintmag;
     quint8 htm_level;
     quint16 t_MSpT;
     int ret = 0;
 
     ret = fread(&faintmag, 2, 1, dataFile);
     if (starReader.getByteSwap())
         faintmag = bswap_16(faintmag);
     ret = fread(&htm_level, 1, 1, dataFile);
     ret = fread(&t_MSpT, 2, 1, dataFile); // Unused
     if (starReader.getByteSwap())
         faintmag = bswap_16(faintmag);
 
     // TODO: Read the multiplying factor from the dataFile
     m_FaintMagnitude = faintmag / 100.0;
 
     if (htm_level != m_skyMesh->level())
         qCWarning(KSTARS) << "HTM Level in shallow star data file and HTM Level in m_skyMesh do not match. EXPECT TROUBLE!";
 
     // JM 2012-12-05: Breaking into 2 loops instead of one previously with multiple IF checks for recordSize
     // While the CPU branch prediction might not suffer any penalities since the branch prediction after a few times
     // should always gets it right. It's better to do it this way to avoid any chances since the compiler might not optimize it.
     if (recordSize == 32)
     {
         for (Trixel i = 0; i < m_skyMesh->size(); ++i)
         {
             Trixel trixel   = i;
             quint64 records = starReader.getRecordCount(i);
             std::shared_ptr<StarBlock> SB(new StarBlock(records));
 
             if (!SB.get())
                 qCCritical(KSTARS) << "ERROR: Could not allocate new StarBlock to hold shallow unnamed stars for trixel "
                          << trixel;
 
             m_starBlockList.at(trixel)->setStaticBlock(SB);
 
             for (quint64 j = 0; j < records; ++j)
             {
                 bool fread_success = fread(&stardata, sizeof(StarData), 1, dataFile);
 
                 if (!fread_success)
                 {
                     qCCritical(KSTARS) << "ERROR: Could not read StarData structure for star #" << j << " under trixel #"
                              << trixel;
                 }
 
                 /* Swap Bytes when required */
                 if (starReader.getByteSwap())
                     byteSwap(&stardata);
 
                 /* Initialize star with data just read. */
                 StarObject *star;
 #ifdef KSTARS_LITE
                 star = &(SB->addStar(stardata)->star);
 #else
                 star = SB->addStar(stardata);
 #endif
                 if (star)
                 {
                     //KStarsData* data = KStarsData::Instance();
                     //star->EquatorialToHorizontal( data->lst(), data->geo()->lat() );
                     //if( star->getHDIndex() != 0 )
                     if (stardata.HD)
                         m_CatalogNumber.insert(stardata.HD, star);
                 }
                 else
                 {
                     qCCritical(KSTARS) << "CODE ERROR: More unnamed static stars in trixel " << trixel
                              << " than we allocated space for!";
                 }
             }
         }
     }
     else
     {
         for (Trixel i = 0; i < m_skyMesh->size(); ++i)
         {
             Trixel trixel   = i;
             quint64 records = starReader.getRecordCount(i);
             std::shared_ptr<StarBlock> SB(new StarBlock(records));
 
             if (!SB.get())
                 qCCritical(KSTARS) << "Could not allocate new StarBlock to hold shallow unnamed stars for trixel "
                          << trixel;
 
             m_starBlockList.at(trixel)->setStaticBlock(SB);
 
             for (quint64 j = 0; j < records; ++j)
             {
                 bool fread_success = false;
                 fread_success      = fread(&deepstardata, sizeof(DeepStarData), 1, dataFile);
 
                 if (!fread_success)
                 {
                     qCCritical(KSTARS) << "Could not read StarData structure for star #" << j << " under trixel #"
                              << trixel;
                 }
 
                 /* Swap Bytes when required */
                 if (starReader.getByteSwap())
                     byteSwap(&deepstardata);
 
                 /* Initialize star with data just read. */
                 StarObject *star;
 #ifdef KSTARS_LITE
                 star = &(SB->addStar(stardata)->star);
 #else
                 star = SB->addStar(deepstardata);
 #endif
                 if (star)
                 {
                     //KStarsData* data = KStarsData::Instance();
                     //star->EquatorialToHorizontal( data->lst(), data->geo()->lat() );
                     //if( star->getHDIndex() != 0 )
                     if (stardata.HD)
                         m_CatalogNumber.insert(stardata.HD, star);
                 }
                 else
                 {
                     qCCritical(KSTARS) << "CODE ERROR: More unnamed static stars in trixel " << trixel
                              << " than we allocated space for!";
                 }
             }
         }
     }
 
     return true;
 }
 
 bool DeepStarComponent::selected()
 {
     return Options::showStars() && fileOpened;
 }
 
 bool openIndexFile()
 {
     // TODO: Work out the details
     /*
     if( hdidxReader.openFile( "Henry-Draper.idx" ) )
         qDebug() << "Could not open HD Index file. Search by HD numbers for deep stars will not work." << endl;
     */
     return 0;
 }
 
 //This function is empty for a reason; we override the normal
 //update function in favor of JiT updates for stars.
 void DeepStarComponent::update(KSNumbers *)
 {
 }
 
 // TODO: Optimize draw, if it is worth it.
 void DeepStarComponent::draw(SkyPainter *skyp)
 {
 #ifndef KSTARS_LITE
     if (!fileOpened)
         return;
 
 #ifdef PROFILE_SINCOS
     long trig_calls_here      = -dms::trig_function_calls;
     long trig_redundancy_here = -dms::redundant_trig_function_calls;
     long cachingdms_bad_uses  = -CachingDms::cachingdms_bad_uses;
     dms::seconds_in_trig      = 0.;
 #endif
 
 #ifdef PROFILE_UPDATECOORDS
     StarObject::updateCoordsCpuTime = 0.;
     StarObject::starsUpdated        = 0;
 #endif
     SkyMap *map       = SkyMap::Instance();
     KStarsData *data  = KStarsData::Instance();
     UpdateID updateID = data->updateID();
 
     //FIXME_FOV -- maybe not clamp like that...
     float radius = map->projector()->fov();
     if (radius > 90.0)
         radius = 90.0;
 
     if (m_skyMesh != SkyMesh::Instance() && m_skyMesh->inDraw())
     {
         printf("Warning: aborting concurrent DeepStarComponent::draw()");
     }
     bool checkSlewing = (map->isSlewing() && Options::hideOnSlew());
 
     //shortcuts to inform whether to draw different objects
     bool hideFaintStars(checkSlewing && Options::hideStars());
     double hideStarsMag = Options::magLimitHideStar();
 
     //adjust maglimit for ZoomLevel
     //    double lgmin = log10(MINZOOM);
     //    double lgmax = log10(MAXZOOM);
     //    double lgz = log10(Options::zoomFactor());
     // TODO: Enable hiding of faint stars
 
     float maglim = StarComponent::zoomMagnitudeLimit();
 
     if (maglim < triggerMag)
         return;
 
     m_zoomMagLimit = maglim;
 
     m_skyMesh->inDraw(true);
 
     SkyPoint *focus = map->focus();
     m_skyMesh->aperture(focus, radius + 1.0, DRAW_BUF); // divide by 2 for testing
 
     MeshIterator region(m_skyMesh, DRAW_BUF);
 
     // If we are to hide the fainter stars (eg: while slewing), we set the magnitude limit to hideStarsMag.
     if (hideFaintStars && maglim > hideStarsMag)
         maglim = hideStarsMag;
 
     StarBlockFactory *m_StarBlockFactory = StarBlockFactory::Instance();
     //    m_StarBlockFactory->drawID = m_skyMesh->drawID();
     //    qDebug() << "Mesh size = " << m_skyMesh->size() << "; drawID = " << m_skyMesh->drawID();
     QTime t;
     int nTrixels = 0;
 
     t_dynamicLoad = 0;
     t_updateCache = 0;
     t_drawUnnamed = 0;
 
     visibleStarCount = 0;
 
     t.start();
 
     // Mark used blocks in the LRU Cache. Not required for static stars
     if (!staticStars)
     {
         while (region.hasNext())
         {
             Trixel currentRegion = region.next();
             for (int i = 0; i < m_starBlockList.at(currentRegion)->getBlockCount(); ++i)
             {
                 std::shared_ptr<StarBlock> prevBlock = ((i >= 1) ? m_starBlockList.at(currentRegion)->block(i - 1) : std::shared_ptr<StarBlock>());
                 std::shared_ptr<StarBlock> block     = m_starBlockList.at(currentRegion)->block(i);
 
                 if (i == 0 && !m_StarBlockFactory->markFirst(block))
                     qCWarning(KSTARS) << "markFirst failed in trixel" << currentRegion;
                 if (i > 0 && !m_StarBlockFactory->markNext(prevBlock, block))
                     qCWarning(KSTARS) << "markNext failed in trixel" << currentRegion << "while marking block" << i;
                 if (i < m_starBlockList.at(currentRegion)->getBlockCount() &&
                     m_starBlockList.at(currentRegion)->block(i)->getFaintMag() < maglim)
                     break;
             }
         }
         t_updateCache = t.restart();
         region.reset();
     }
 
     while (region.hasNext())
     {
         ++nTrixels;
         Trixel currentRegion = region.next();
 
         // NOTE: We are guessing that the last 1.5/16 magnitudes in the catalog are just additions and the star catalog
         //       is actually supposed to reach out continuously enough only to mag m_FaintMagnitude * ( 1 - 1.5/16 )
         // TODO: Is there a better way? We may have to change the magnitude tolerance if the catalog changes
         // Static stars need not execute fillToMag
 
         // Safety check if the current region is in star block list
         if ((int)currentRegion >= m_starBlockList.size())
             continue;
 
         if (!staticStars && !m_starBlockList.at(currentRegion)->fillToMag(maglim) &&
             maglim <= m_FaintMagnitude * (1 - 1.5 / 16))
         {
             qCWarning(KSTARS) << "SBL::fillToMag( " << maglim << " ) failed for trixel " << currentRegion;
         }
 
         t_dynamicLoad += t.restart();
 
         //        qDebug() << "Drawing SBL for trixel " << currentRegion << ", SBL has "
         //                 <<  m_starBlockList[ currentRegion ]->getBlockCount() << " blocks" << endl;
 
         // REMARK: The following should never carry state, except for const parameters like updateID and maglim
         std::function<void(std::shared_ptr<StarBlock>)> mapFunction = [&updateID, &maglim](std::shared_ptr<StarBlock> myBlock) {
             for (StarObject &star : myBlock->contents())
             {
                 if (star.updateID != updateID)
                     star.JITupdate();
                 if (star.mag() > maglim)
                     break;
             }
         };
 
         QtConcurrent::blockingMap(m_starBlockList.at(currentRegion)->contents(), mapFunction);
 
         for (int i = 0; i < m_starBlockList.at(currentRegion)->getBlockCount(); ++i)
         {
             std::shared_ptr<StarBlock> block = m_starBlockList.at(currentRegion)->block(i);
             //            qDebug() << "---> Drawing stars from block " << i << " of trixel " <<
             //                currentRegion << ". SB has " << block->getStarCount() << " stars" << endl;
             for (int j = 0; j < block->getStarCount(); j++)
             {
                 StarObject *curStar = block->star(j);
 
                 //                qDebug() << "We claim that he's from trixel " << currentRegion
                 //<< ", and indexStar says he's from " << m_skyMesh->indexStar( curStar );
 
                 float mag = curStar->mag();
 
                 if (mag > maglim)
                     break;
 
                 if (skyp->drawPointSource(curStar, mag, curStar->spchar()))
                     visibleStarCount++;
             }
         }
 
         // DEBUG: Uncomment to identify problems with Star Block Factory / preservation of Magnitude Order in the LRU Cache
         //        verifySBLIntegrity();
         t_drawUnnamed += t.restart();
     }
     m_skyMesh->inDraw(false);
 #ifdef PROFILE_SINCOS
     trig_calls_here += dms::trig_function_calls;
     trig_redundancy_here += dms::redundant_trig_function_calls;
     cachingdms_bad_uses += CachingDms::cachingdms_bad_uses;
     qDebug() << "Spent " << dms::seconds_in_trig << " seconds doing " << trig_calls_here
              << " trigonometric function calls amounting to an average of "
              << 1000.0 * dms::seconds_in_trig / double(trig_calls_here) << " ms per call";
     qDebug() << "Redundancy of trig calls in this draw: "
              << double(trig_redundancy_here) / double(trig_calls_here) * 100. << "%";
     qDebug() << "CachedDms constructor calls so far: " << CachingDms::cachingdms_constructor_calls;
     qDebug() << "Caching has prevented " << CachingDms::cachingdms_delta << " redundant trig function calls";
     qDebug() << "Bad cache uses in this draw: " << cachingdms_bad_uses;
 #endif
 #ifdef PROFILE_UPDATECOORDS
     qDebug() << "Spent " << StarObject::updateCoordsCpuTime << " seconds updating " << StarObject::starsUpdated
              << " stars' coordinates (StarObject::updateCoords) for an average of "
              << double(StarObject::updateCoordsCpuTime) / double(StarObject::starsUpdated) * 1.e6 << " us per star.";
 #endif
 
 #else
     Q_UNUSED(skyp)
 #endif
 }
 
 bool DeepStarComponent::openDataFile()
 {
     if (starReader.getFileHandle())
         return true;
 
     starReader.openFile(dataFileName);
     fileOpened = false;
     if (!starReader.getFileHandle())
         qCWarning(KSTARS) << "Failed to open deep star catalog " << dataFileName << ". Disabling it.";
     else if (!starReader.readHeader())
         qCWarning(KSTARS) << "Header read error for deep star catalog " << dataFileName << "!! Disabling it!" << endl;
     else
     {
         qint16 faintmag;
         quint8 htm_level;
         int ret = 0;
 
         ret = fread(&faintmag, 2, 1, starReader.getFileHandle());
         if (starReader.getByteSwap())
             faintmag = bswap_16(faintmag);
         if (starReader.guessRecordSize() == 16)
             m_FaintMagnitude = faintmag / 1000.0;
         else
             m_FaintMagnitude = faintmag / 100.0;
         ret = fread(&htm_level, 1, 1, starReader.getFileHandle());
         qCInfo(KSTARS) << "Processing " << dataFileName << ", HTMesh Level" << htm_level;
         m_skyMesh = SkyMesh::Instance(htm_level);
         if (!m_skyMesh)
         {
             if (!(m_skyMesh = SkyMesh::Create(htm_level)))
             {
                 qCWarning(KSTARS) << "Could not create HTMesh of level " << htm_level << " for catalog " << dataFileName
                          << ". Skipping it.";
                 return false;
             }
         }
         ret = fread(&MSpT, 2, 1, starReader.getFileHandle());
         if (starReader.getByteSwap())
             MSpT = bswap_16(MSpT);
         fileOpened = true;
         qCInfo(KSTARS) << "  Sky Mesh Size: " << m_skyMesh->size();
         for (long int i = 0; i < m_skyMesh->size(); i++)
         {
             std::shared_ptr<StarBlockList> sbl(new StarBlockList(i, this));
 
             if (!sbl.get())
             {
                 qCWarning(KSTARS) << "nullptr starBlockList. Expect trouble!";
             }
             m_starBlockList.append(sbl);
         }
         m_zoomMagLimit = 0.06;
     }
 
     return fileOpened;
 }
 
 StarObject *DeepStarComponent::findByHDIndex(int HDnum)
 {
     // Currently, we only handle HD catalog indexes
     return m_CatalogNumber.value(HDnum, nullptr); // TODO: Maybe, make this more general.
 }
 
 // This uses the main star index for looking up nearby stars but then
 // filters out objects with the generic name "star".  We could easily
 // build an index for just the named stars which would make this go
 // much faster still.  -jbb
 //
 
 SkyObject *DeepStarComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
-    StarObject *oBest = 0;
+    StarObject *oBest = nullptr;
 
 #ifdef KSTARS_LITE
     m_zoomMagLimit = StarComponent::zoomMagnitudeLimit();
 #endif
     if (!fileOpened)
         return nullptr;
 
     m_skyMesh->index(p, maxrad + 1.0, OBJ_NEAREST_BUF);
 
     MeshIterator region(m_skyMesh, OBJ_NEAREST_BUF);
 
     while (region.hasNext())
     {
         Trixel currentRegion = region.next();
 
         // Safety check if the current region is in star block list
         if ((int)currentRegion >= m_starBlockList.size())
             continue;
 
         for (int i = 0; i < m_starBlockList.at(currentRegion)->getBlockCount(); ++i)
         {
             std::shared_ptr<StarBlock> block = m_starBlockList.at(currentRegion)->block(i);
             for (int j = 0; j < block->getStarCount(); ++j)
             {
 #ifdef KSTARS_LITE
                 StarObject *star = &(block->star(j)->star);
 #else
                 StarObject *star = block->star(j);
 #endif
                 if (!star)
                     continue;
                 if (star->mag() > m_zoomMagLimit)
                     continue;
 
                 double r = star->angularDistanceTo(p).Degrees();
                 if (r < maxrad)
                 {
                     oBest  = star;
                     maxrad = r;
                 }
             }
         }
     }
 
     // TODO: What if we are looking around a point that's not on
     // screen? objectNearest() will need to keep on filling up all
     // trixels around the SkyPoint to find the best match in case it
     // has not been found. Ideally, this should be implemented in a
     // different method and should be called after all other
     // candidates (eg: DeepSkyObject::objectNearest()) have been
     // called.
 
     return oBest;
 }
 
 bool DeepStarComponent::starsInAperture(QList<StarObject *> &list, const SkyPoint &center, float radius, float maglim)
 {
     if (maglim < triggerMag)
         return false;
 
     // For DeepStarComponents, whether we use ra0() and dec0(), or
     // ra() and dec(), should not matter, because the stars are
     // repeated in all trixels that they will pass through, although
     // the factuality of this statement needs to be verified
 
     // Ensure that we have deprecessed the (RA, Dec) to (RA0, Dec0)
     Q_ASSERT(center.ra0().Degrees() >= 0.0);
     Q_ASSERT(center.dec0().Degrees() <= 90.0);
 
     m_skyMesh->intersect(center.ra0().Degrees(), center.dec0().Degrees(), radius, (BufNum)OBJ_NEAREST_BUF);
 
     MeshIterator region(m_skyMesh, OBJ_NEAREST_BUF);
 
     if (maglim < -28)
         maglim = m_FaintMagnitude;
 
     while (region.hasNext())
     {
         Trixel currentRegion = region.next();
         // FIXME: Build a better way to iterate over all stars.
         // Ideally, StarBlockList should have such a facility.
         std::shared_ptr<StarBlockList> sbl = m_starBlockList[currentRegion];
         sbl->fillToMag(maglim);
         for (int i = 0; i < sbl->getBlockCount(); ++i)
         {
             std::shared_ptr<StarBlock> block = sbl->block(i);
             for (int j = 0; j < block->getStarCount(); ++j)
             {
 #ifdef KSTARS_LITE
                 StarObject *star = &(block->star(j)->star);
 #else
                 StarObject *star = block->star(j);
 #endif
                 if (star->mag() > maglim)
                     break; // Stars are organized by magnitude, so this should work
                 if (star->angularDistanceTo(&center).Degrees() <= radius)
                     list.append(star);
             }
         }
     }
 
     return true;
 }
 
 void DeepStarComponent::byteSwap(DeepStarData *stardata)
 {
     stardata->RA   = bswap_32(stardata->RA);
     stardata->Dec  = bswap_32(stardata->Dec);
     stardata->dRA  = bswap_16(stardata->dRA);
     stardata->dDec = bswap_16(stardata->dDec);
     stardata->B    = bswap_16(stardata->B);
     stardata->V    = bswap_16(stardata->V);
 }
 
 void DeepStarComponent::byteSwap(StarData *stardata)
 {
     stardata->RA       = bswap_32(stardata->RA);
     stardata->Dec      = bswap_32(stardata->Dec);
     stardata->dRA      = bswap_32(stardata->dRA);
     stardata->dDec     = bswap_32(stardata->dDec);
     stardata->parallax = bswap_32(stardata->parallax);
     stardata->HD       = bswap_32(stardata->HD);
     stardata->mag      = bswap_16(stardata->mag);
     stardata->bv_index = bswap_16(stardata->bv_index);
 }
 
 bool DeepStarComponent::verifySBLIntegrity()
 {
     float faintMag = -5.0;
     bool integrity = true;
 
     for (Trixel trixel = 0; trixel < m_skyMesh->size(); ++trixel)
     {
         for (int i = 0; i < m_starBlockList[trixel]->getBlockCount(); ++i)
         {
             std::shared_ptr<StarBlock> block = m_starBlockList[trixel]->block(i);
 
             if (i == 0)
                 faintMag = block->getBrightMag();
             // NOTE: Assumes 2 decimal places in magnitude field. TODO: Change if it ever does change
             if (block->getBrightMag() != faintMag && (block->getBrightMag() - faintMag) > 0.5)
             {
                 qCWarning(KSTARS) << "Trixel " << trixel << ": ERROR: faintMag of prev block = " << faintMag
                          << ", brightMag of block #" << i << " = " << block->getBrightMag();
                 integrity = false;
             }
             if (i > 1 && (!block->prev))
                 qCWarning(KSTARS) << "Trixel " << trixel << ": ERROR: Block" << i << "is unlinked in LRU Cache";
             if (block->prev && block->prev->parent == m_starBlockList[trixel].get() &&
                 block->prev != m_starBlockList[trixel]->block(i - 1))
             {
                 qCWarning(KSTARS) << "Trixel " << trixel
                          << ": ERROR: SBF LRU Cache linked list seems to be broken at before block " << i << endl;
                 integrity = false;
             }
             faintMag = block->getFaintMag();
         }
     }
     return integrity;
 }
diff --git a/kstars/skycomponents/flagcomponent.h b/kstars/skycomponents/flagcomponent.h
index 420cf3030..79104c583 100644
--- a/kstars/skycomponents/flagcomponent.h
+++ b/kstars/skycomponents/flagcomponent.h
@@ -1,185 +1,185 @@
 /***************************************************************************
                           flagcomponent.h  -  K Desktop Planetarium
                              -------------------
     begin                : Fri 16 Jan 2009
     copyright            : (C) 2009 by Jerome SONRIER
     email                : jsid@emor3j.fr.eu.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "pointlistcomponent.h"
 
 #include <QColor>
 #include <QImage>
 #include <QObject>
 #include <QStringList>
 
 class SkyPainter;
 
 /**
  * @class FlagComponent
  * @short Represents a flag on the sky map.
  * Each flag is composed by a SkyPoint where coordinates are stored, an
  * epoch and a label. This class also stores flag images and associates
  * each flag with an image.
  * When FlagComponent is created, it seeks all file names beginning with
  * "_flag" in the user directory and *considere them as flag images.
  *
  * The file flags.dat stores coordinates, epoch, image name and label of each
  * flags and is read to init FlagComponent
  *
  * @author Jerome SONRIER
  * @version 1.1
  */
 class FlagComponent : public QObject, public PointListComponent
 {
     Q_OBJECT
 
   public:
     /** @short Constructor. */
     explicit FlagComponent(SkyComposite *);
 
     /** @short Destructor. */
     ~FlagComponent() override;
 
     void draw(SkyPainter *skyp) override;
 
     bool selected() override;
 
-    void update(KSNumbers *num = 0) override;
+    void update(KSNumbers *num = nullptr) override;
 
     /**
      * @short Add a flag.
      * @param SkyPoint Sky point in epoch coordinates
      * @param epoch Moment for which celestial coordinates are specified
      * @param image Image name
      * @param label Label of the flag
      */
     void add(const SkyPoint &flagPoint, QString epoch, QString image, QString label, QColor labelColor);
 
     /**
      * @short Remove a flag.
      * @param index Index of the flag to be remove.
      */
     void remove(int index);
 
     /**
      * @short Update a flag.
      * @param index index of the flag to be updated.
      * @param epoch new flag epoch.
      * @param image new flag image.
      * @param label new flag label.
      * @param labelColor new flag label color.
      */
     void updateFlag(int index, const SkyPoint &flagPoint, QString epoch, QString image, QString label,
                     QColor labelColor);
 
     /**
      * @short Return image names.
      * @return the list of all image names
      */
     QStringList getNames();
 
     /**
      * @short Return the numbers of flags.
      * @return the size of m_PointList
      */
     int size();
 
     /**
      * @short Get epoch.
      * @return the epoch as a string
      * @param index Index of the flag
      */
     QString epoch(int index);
 
     /**
      * @short Get label.
      * @return the label as a string
      * @param index Index of the flag
      */
     QString label(int index);
 
     /**
      * @short Get label color.
      * @return the label color
      * @param index Index of the flag
      */
     QColor labelColor(int index);
 
     /**
      * @short Get image.
      * @return the image associated with the flag
      * @param index Index of the flag
      */
     QImage image(int index);
 
     /**
      * @short Get image name.
      * @return the name of the image associated with the flag
      * @param index Index of the flag
      */
     QString imageName(int index);
 
     /**
      * @short Get images.
      * @return all images that can be use
      */
     QList<QImage> imageList();
 
     /**
      * @short Get image.
      * @param index Index of the image in m_Images
      * @return an image from m_Images
      */
     QImage imageList(int index);
 
     /**
      * @brief epochCoords return coordinates recorded in original epoch
      * @param index index of the flag
      * @return pair of RA/DEC in original epoch
      */
     QPair<double, double> epochCoords(int index);
 
     /**
      * @short Get list of flag indexes near specified SkyPoint with radius specified in pixels.
      * @param point central SkyPoint.
      * @param pixelRadius radius in pixels.
      */
     QList<int> getFlagsNearPix(SkyPoint *point, int pixelRadius);
 
     /** @short Load flags from flags.dat file. */
     void loadFromFile();
 
     /** @short Save flags to flags.dat file. */
     void saveToFile();
 
   private:
     // Convert from given epoch to J2000. If epoch is already J2000, do nothing
     void toJ2000(SkyPoint *p, QString epoch);
 
     /// List of epochs
     QStringList m_Epoch;
     /// RA/DEC stored in original epoch
     QList<QPair<double, double>> m_EpochCoords;
     /// List of image index
     QList<int> m_FlagImages;
     /// List of label
     QStringList m_Labels;
     /// List of label colors
     QList<QColor> m_LabelColors;
     /// List of image names
     QStringList m_Names;
     /// List of flag images
     QList<QImage> m_Images;
 };
diff --git a/kstars/skycomponents/linelistindex.cpp b/kstars/skycomponents/linelistindex.cpp
index b43786126..75449912a 100644
--- a/kstars/skycomponents/linelistindex.cpp
+++ b/kstars/skycomponents/linelistindex.cpp
@@ -1,269 +1,269 @@
     /***************************************************************************
                  linelistindex.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2007-07-04
     copyright            : (C) 2007 by James B. Bowlin
     email                : bowlin@mindspring.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 /****************************************************************************
  * The filled polygon code in the innermost loops below in drawFilled*() below
  * implements the Sutherland-Hodgman's Polygon clipping algorithm.  Please
  * don't mess with it unless you ensure that the Milky Way clipping continues
  * to work.  The line clipping uses a similar but slightly less complicated
  * algorithm.
  *
  * Since the clipping code is a bit messy, there are four versions of the
  * inner loop for Filled/Outline * Integer/Float.  This moved these two
  * decisions out of the inner loops to make them a bit faster and less
  * messy.
  *
  * -- James B. Bowlin
  *
  ****************************************************************************/
 
 #include "linelistindex.h"
 
 #include "Options.h"
 #include "kstarsdata.h"
 #include "linelist.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #endif
 #include "skypainter.h"
 #include "htmesh/MeshIterator.h"
 
 LineListIndex::LineListIndex(SkyComposite *parent, const QString &name) : SkyComponent(parent), m_name(name)
 {
     m_skyMesh   = SkyMesh::Instance();
     m_lineIndex.reset(new LineListHash());
     m_polyIndex.reset(new LineListHash());
 }
 
 LineListIndex::~LineListIndex()
 {
 }
 
 // This is a callback for the indexLines() function below
 const IndexHash &LineListIndex::getIndexHash(LineList *lineList)
 {
     return skyMesh()->indexLine(lineList->points());
 }
 
 void LineListIndex::removeLine(const std::shared_ptr<LineList> &lineList)
 {
     const IndexHash &indexHash     = getIndexHash(lineList.get());
     IndexHash::const_iterator iter = indexHash.constBegin();
 
     while (iter != indexHash.constEnd())
     {
         Trixel trixel = iter.key();
         iter++;
 
         if (m_lineIndex->contains(trixel))
             m_lineIndex->value(trixel)->removeOne(lineList);
     }
     m_listList.removeOne(lineList);
 }
 
 void LineListIndex::appendLine(const std::shared_ptr<LineList> &lineList)
 {
     const IndexHash &indexHash     = getIndexHash(lineList.get());
     IndexHash::const_iterator iter = indexHash.constBegin();
 
     while (iter != indexHash.constEnd())
     {
         Trixel trixel = iter.key();
 
         iter++;
         if (!m_lineIndex->contains(trixel))
         {
             m_lineIndex->insert(trixel, std::shared_ptr<LineListList>(new LineListList()));
         }
         m_lineIndex->value(trixel)->append(lineList);
     }
     m_listList.append(lineList);
 }
 
 void LineListIndex::appendPoly(const std::shared_ptr<LineList> &lineList)
 {
     const IndexHash &indexHash     = skyMesh()->indexPoly(lineList->points());
     IndexHash::const_iterator iter = indexHash.constBegin();
 
     while (iter != indexHash.constEnd())
     {
         Trixel trixel = iter.key();
         iter++;
 
         if (!m_polyIndex->contains(trixel))
         {
             m_polyIndex->insert(trixel, std::shared_ptr<LineListList>(new LineListList()));
         }
         m_polyIndex->value(trixel)->append(lineList);
     }
 }
 
 void LineListIndex::appendBoth(const std::shared_ptr<LineList> &lineList)
 {
     QMutexLocker m1(&mutex);
 
     appendLine(lineList);
     appendPoly(lineList);
 }
 
 void LineListIndex::reindexLines()
 {
     LineListHash *oldIndex = m_lineIndex.release();
     DrawID drawID = skyMesh()->incDrawID();
 
     m_lineIndex.reset(new LineListHash());
     for (auto &listList : *oldIndex)
     {
         for (auto &item : *listList)
         {
             if (item->drawID == drawID)
                 continue;
 
             item->drawID = drawID;
             appendLine(item);
         }
         listList.reset();
     }
     delete oldIndex;
 }
 
 void LineListIndex::JITupdate(LineList *lineList)
 {
     KStarsData *data   = KStarsData::Instance();
     lineList->updateID = data->updateID();
     SkyList *points    = lineList->points();
 
     if (lineList->updateNumID != data->updateNumID())
     {
         lineList->updateNumID = data->updateNumID();
         KSNumbers *num        = data->updateNum();
         for (int i = 0; i < points->size(); i++)
         {
             points->at(i)->updateCoords(num);
         }
     }
 
     for (int i = 0; i < points->size(); i++)
     {
         points->at(i)->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     }
 }
 
 // This is a callback used in draw() below
 void LineListIndex::preDraw(SkyPainter *skyp)
 {
     skyp->setPen(QPen(QBrush(QColor("white")), 1, Qt::SolidLine));
 }
 
 void LineListIndex::draw(SkyPainter *skyp)
 {
     if (!selected())
         return;
     preDraw(skyp);
     drawLines(skyp);
 }
 
 #ifdef KSTARS_LITE
 MeshIterator LineListIndex::visibleTrixels()
 {
     return MeshIterator(skyMesh(), drawBuffer());
 }
 #endif
 
 // This is a callback used int drawLinesInt() and drawLinesFloat()
 SkipHashList *LineListIndex::skipList(LineList *lineList)
 {
     Q_UNUSED(lineList)
-    return 0;
+    return nullptr;
 }
 
 void LineListIndex::drawLines(SkyPainter *skyp)
 {
     DrawID drawID     = skyMesh()->drawID();
     UpdateID updateID = KStarsData::Instance()->updateID();
 
     for (auto &lineListList : m_lineIndex->values())
     {
         for (int i = 0; i < lineListList->size(); i++)
         {
             std::shared_ptr<LineList> lineList = lineListList->at(i);
 
             if (lineList->drawID == drawID)
                 continue;
             lineList->drawID = drawID;
 
             if (lineList->updateID != updateID)
                 JITupdate(lineList.get());
 
             skyp->drawSkyPolyline(lineList.get(), skipList(lineList.get()), label());
         }
     }
 }
 
 void LineListIndex::drawFilled(SkyPainter *skyp)
 {
     DrawID drawID     = skyMesh()->drawID();
     UpdateID updateID = KStarsData::Instance()->updateID();
 
     MeshIterator region(skyMesh(), drawBuffer());
 
     while (region.hasNext())
     {
         std::shared_ptr<LineListList> lineListList = m_polyIndex->value(region.next());
 
-        if (lineListList == 0)
+        if (lineListList == nullptr)
             continue;
 
         for (int i = 0; i < lineListList->size(); i++)
         {
             std::shared_ptr<LineList> lineList = lineListList->at(i);
 
             // draw each Linelist at most once
             if (lineList->drawID == drawID)
                 continue;
             lineList->drawID = drawID;
 
             if (lineList->updateID != updateID)
                 JITupdate(lineList.get());
 
             skyp->drawSkyPolygon(lineList.get());
         }
     }
 }
 
 void LineListIndex::intro()
 {
     emitProgressText(i18n("Loading %1", m_name));
     if (skyMesh()->debug() >= 1)
         qDebug() << QString("Loading %1 ...").arg(m_name);
 }
 
 void LineListIndex::summary()
 {
     if (skyMesh()->debug() < 2)
         return;
 
     int total    = skyMesh()->size();
     int polySize = m_polyIndex->size();
     int lineSize = m_lineIndex->size();
 
     if (lineSize > 0)
         printf("%4d out of %4d trixels in line index %3d%%\n", lineSize, total, 100 * lineSize / total);
 
     if (polySize > 0)
         printf("%4d out of %4d trixels in poly index %3d%%\n", polySize, total, 100 * polySize / total);
 }
diff --git a/kstars/skycomponents/linelistindex.h b/kstars/skycomponents/linelistindex.h
index 50734f850..8f012ba3c 100644
--- a/kstars/skycomponents/linelistindex.h
+++ b/kstars/skycomponents/linelistindex.h
@@ -1,188 +1,188 @@
 /***************************************************************************
                linelistindex.h  -  K Desktop Planetarium
                              -------------------
     begin                : 2007-07-04
     copyright            : (C) 2007 James B. Bowlin
     email                : bowlin@mindspring.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "skycomponent.h"
 #include "skymesh.h"
 
 #include <QMutex>
 
 #include <memory>
 #include <set>
 
 class LineList;
 class LineListLabel;
 class SkipHashList;
 class SkyPainter;
 
 /**
  * @class LineListIndex
  * Contains almost all the code needed for indexing and drawing and clipping
  * lines and polygons.
  *
  * @author James B. Bowlin @version 0.1
  */
 class LineListIndex : public SkyComponent
 {
     friend class LinesItem; //Needs access to reindexLines
   public:
     /**
      * @short Constructor
      * Simply set the internal skyMesh, parent, and name.
      * @param parent Pointer to the parent SkyComponent object
      * @param mesh Pointer to the universal SkyMesh instance
      * @param name name of the subclass used for debugging
      */
     explicit LineListIndex(SkyComposite *parent, const QString &name = "");
 
     /** @short Destructor */
     ~LineListIndex() override;
 
     /**
      * @short The top level draw routine.  Draws all the LineLists for any
      * subclass in one fell swoop which minimizes some of the loop overhead.
      * Overridden by MilkWay so it can decide whether to draw outlines or
      * filled.  Therefore MilkyWay does not need to override preDraw().  The
      * MilkyWay draw() routine calls all of the more specific draw()
      * routines below.
      */
     void draw(SkyPainter *skyp) override;
 
 #ifdef KSTARS_LITE
     /**
      * @short KStars Lite needs direct access to m_lineIndex for drawing the lines
      */
     inline LineListHash *lineIndex() const { return m_lineIndex.get(); }
     inline LineListHash *polyIndex() const { return m_polyIndex.get(); }
 
     /** @short returns MeshIterator for currently visible trixels */
     MeshIterator visibleTrixels();
 
 #endif
     //Moved to public because KStars Lite uses it
     /**
      * @short this is called from within the draw routines when the updateID
      * of the lineList is stale.  It is virtual because different subclasses
      * have different update routines.  NoPrecessIndex doesn't precess in
      * the updates and ConstellationLines must update its points as stars,
      * not points.  that doesn't precess the points.
      */
     virtual void JITupdate(LineList *lineList);
 
   protected:
     /**
      * @short as the name says, recreates the lineIndex using the LineLists
      * in the previous index.  Since we are indexing everything at J2000
      * this is only used by ConstellationLines which needs to reindex
      * because of the proper motion of the stars.
      */
     void reindexLines();
 
     /** @short retrieve name of object */
     QString name() const { return m_name; }
 
     /**
      * @short displays a message that we are loading m_name.  Also prints
      * out the message if skyMesh debug is greater than zero.
      */
     void intro();
 
     /**
      * @short prints out some summary statistics if the skyMesh debug is
      * greater than 1.
      */
     void summary();
 
     /** @short Returns the SkyMesh object. */
     SkyMesh *skyMesh() { return m_skyMesh; }
 
     /**
      * @short Typically called from within a subclasses constructors.
      * Adds the trixels covering the outline of lineList to the lineIndex.
      */
     void appendLine(const std::shared_ptr<LineList> &lineList);
 
     void removeLine(const std::shared_ptr<LineList> &lineList);
 
     /**
      * @short Typically called from within a subclasses constructors.
      * Adds the trixels covering the full lineList to the polyIndex.
      */
     void appendPoly(const std::shared_ptr<LineList> &lineList);
 
     /**
      * @short a convenience method that adds a lineList to both the lineIndex and the polyIndex.
      */
     void appendBoth(const std::shared_ptr<LineList> &lineList);
 
     /**
      * @short Draws all the lines in m_listList as simple lines in float mode.
      */
     void drawLines(SkyPainter *skyp);
 
     /**
      * @short Draws all the lines in m_listList as filled polygons in float
      * mode.
      */
     void drawFilled(SkyPainter *skyp);
 
     /**
      * @short Gives the subclasses access to the top of the draw() method.
      * Typically used for setting the QPen, etc. in the QPainter being
      * passed in.  Defaults to setting a thin white pen.
      */
     virtual void preDraw(SkyPainter *skyp);
 
     /**
      * @short a callback overridden by NoPrecessIndex so it can use the
      * drawing code with the non-reverse-precessed mesh buffer.
      */
     virtual MeshBufNum_t drawBuffer() { return DRAW_BUF; }
 
     /**
      * @short Returns an IndexHash from the SkyMesh that contains the set of
      * trixels that cover lineList.  Overridden by SkipListIndex so it can
      * pass SkyMesh an IndexHash indicating which line segments should not
      * be indexed @param lineList contains the list of points to be covered.
      */
     virtual const IndexHash &getIndexHash(LineList *lineList);
 
     /**
      * @short Also overridden by SkipListIndex.
      * Controls skipping inside of the draw() routines.  The default behavior
      * is to simply return a null pointer.
      *
      * FIXME: I don't think that the SkipListIndex class even exists -- hdevalence
      */
     virtual SkipHashList *skipList(LineList *lineList);
 
-    virtual LineListLabel *label() { return 0; }
+    virtual LineListLabel *label() { return nullptr; }
 
     inline LineListList listList() const { return m_listList; }
 
   private:
     QString m_name;
 
     SkyMesh *m_skyMesh { nullptr };
     std::unique_ptr<LineListHash> m_lineIndex;
     std::unique_ptr<LineListHash> m_polyIndex;
 
     LineListList m_listList;
 
     QMutex mutex;
 };
diff --git a/kstars/skycomponents/linelistlabel.cpp b/kstars/skycomponents/linelistlabel.cpp
index c926e537d..5781194da 100644
--- a/kstars/skycomponents/linelistlabel.cpp
+++ b/kstars/skycomponents/linelistlabel.cpp
@@ -1,207 +1,207 @@
 /***************************************************************************
 					linelistlabel.cpp -  K Desktop Planetarium
 							 -------------------
 	begin				: 2007-08-08
 	copyright			: (C) 2007 James B. Bowlin
 	email				: bowlin@mindspring.com
  ***************************************************************************/
 
 /***************************************************************************
  *																		 *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or	 *
  *   (at your option) any later version.								   *
  *																		 *
  ***************************************************************************/
 
 #include "linelistlabel.h"
 
 #include "linelist.h"
 #include "Options.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #endif
 #include "skylabeler.h"
 #include "projections/projector.h"
 
 LineListLabel::LineListLabel(const QString &text) : m_text(text)
 {
     m_skyLabeler = SkyLabeler::Instance();
 
     // prevent a crash if drawGuideLabel() is called before reset()
     for (int i = 0; i < 4; i++)
     {
         m_labList[i]  = nullptr;
         m_labIndex[i] = 0;
     }
 }
 
 void LineListLabel::reset()
 {
     // These are the indices of the farthest left point, farthest right point,
     // etc.  The are data members so the drawLabels() routine can use them.
     // Zero indicates an index that was never set and is considered invalid
     // inside of drawLabels().
     for (int i = 0; i < 4; i++)
     {
-        m_labList[i]  = 0;
+        m_labList[i]  = nullptr;
         m_labIndex[i] = 0;
     }
 
     // These are used to keep track of the element that is farthest left,
     // farthest right, etc.
     m_farLeft  = 100000.0;
     m_farRight = 0.0;
     m_farTop   = 100000.0;
     m_farBot   = 0.0;
 
     m_skyLabeler->getMargins(m_text, &m_marginLeft, &m_marginRight, &m_marginTop, &m_marginBot);
 }
 
 void LineListLabel::updateLabelCandidates(qreal x, qreal y, LineList *lineList, int i)
 {
     if (i < 1)
         return;
 
     if (x < m_marginLeft || x > m_marginRight || y < m_marginTop || y > m_marginBot)
         return;
 
     if (x < m_farLeft)
     {
         m_labIndex[LeftCandidate] = i;
         m_labList[LeftCandidate]  = lineList;
         m_farLeft                 = x;
     }
     if (x > m_farRight)
     {
         m_labIndex[RightCandidate] = i;
         m_labList[RightCandidate]  = lineList;
         m_farRight                 = x;
     }
     if (y > m_farBot)
     {
         m_labIndex[BotCandidate] = i;
         m_labList[BotCandidate]  = lineList;
         m_farBot                 = x;
     }
     if (y < m_farTop)
     {
         m_labIndex[TopCandidate] = i;
         m_labList[TopCandidate]  = lineList;
         m_farTop                 = x;
     }
 }
 
 void LineListLabel::draw()
 {
 #ifndef KSTARS_LITE
     const Projector *proj = SkyMap::Instance()->projector();
 
     double comfyAngle = 40.0; // the first valid candidate with an angle
     // smaller than this gets displayed.  If you set
     // this to > 90. then the first valid candidate
     // will be displayed, regardless of angle.
 
     // We store info about the four candidate points in arrays to make several
     // of the steps easier, particularly choosing the valid candidate with the
     // smallest angle from the horizontal.
 
     int idx[4];                                   // index of candidate
     LineList *list[4];                            // LineList of candidate
     double a[4] = { 360.0, 360.0, 360.0, 360.0 }; // angle, default to large value
     QPointF o[4];                                 // candidate point
     bool okay[4] = { true, true, true, true };    // flag  candidate false if it
     // overlaps a previous label.
 
     // We no longer adjust the order but if we were to it would be here
     static int Order[4] = { LeftCandidate, BotCandidate, TopCandidate, LeftCandidate };
 
     for (int j = 0; j < 4; j++)
     {
         idx[j]  = m_labIndex[Order[j]];
         list[j] = m_labList[Order[j]];
     }
 
     // Make sure start with a valid candidate
     int first = 0;
     for (; first < 4; first++)
     {
         if (idx[first])
             break;
     }
 
     // return if there are no valid candidates
     if (first >= 4)
         return;
 
     // Try the points in order and print the label if we can draw it at
     // a comfortable angle for viewing;
     for (int j = first; j < 4; j++)
     {
         o[j] = angleAt(proj, list[j], idx[j], &a[j]);
 
         if (!idx[j] || !proj->checkVisibility(list[j]->at(idx[j]).get()))
         {
             okay[j] = false;
             continue;
         }
 
         if (fabs(a[j]) > comfyAngle)
             continue;
 
         if (m_skyLabeler->drawGuideLabel(o[j], m_text, a[j]))
             return;
 
         okay[j] = false;
     }
 
     //--- No angle was comfy so pick the one with the smallest angle ---
 
     // Index of the index/angle/point that gets displayed
     int best = first;
 
     // find first valid candidate that does not overlap existing labels
     for (; best < 4; best++)
     {
         if (idx[best] && okay[best])
             break;
     }
 
     // return if all candiates either overlap or are invalid
     if (best >= 4)
         return;
 
     // find the valid non-overlap candidate with the smallest angle
     for (int j = best + 1; j < 4; j++)
     {
         if (idx[j] && okay[j] && fabs(a[j]) < fabs(a[best]))
             best = j;
     }
 
     m_skyLabeler->drawGuideLabel(o[best], m_text, a[best]);
 #endif
 }
 
 QPointF LineListLabel::angleAt(const Projector *proj, LineList *list, int i, double *angle)
 {
     const SkyPoint *pThis = list->at(i).get();
     const SkyPoint *pLast = list->at(i-1).get();
 
     QPointF oThis = proj->toScreen(pThis);
     QPointF oLast = proj->toScreen(pLast);
 
     double sx = double(oThis.x() - oLast.x());
     double sy = double(oThis.y() - oLast.y());
 
     *angle = atan2(sy, sx) * 180.0 / dms::PI;
 
     // FIXME: use clamp in KSUtils
     // Never draw the label upside down
     if (*angle < -90.0)
         *angle += 180.0;
     if (*angle > 90.0)
         *angle -= 180.0;
 
     return oThis;
 }
diff --git a/kstars/skycomponents/listcomponent.cpp b/kstars/skycomponents/listcomponent.cpp
index a2e252f56..f36a1e14f 100644
--- a/kstars/skycomponents/listcomponent.cpp
+++ b/kstars/skycomponents/listcomponent.cpp
@@ -1,88 +1,88 @@
 /***************************************************************************
                           listcomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/10/01
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "listcomponent.h"
 
 #include "kstarsdata.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #endif
 
 ListComponent::ListComponent(SkyComposite *parent) : SkyComponent(parent)
 {
 }
 
 ListComponent::~ListComponent()
 {
     qDeleteAll(m_ObjectList);
     m_ObjectList.clear();
     clear();
 }
 
 void ListComponent::clear()
 {
     while (!m_ObjectList.isEmpty())
     {
         SkyObject *o = m_ObjectList.takeFirst();
         removeFromNames(o);
         delete o;
     }
 }
 
 void ListComponent::update(KSNumbers *num)
 {
     if (!selected())
         return;
     KStarsData *data = KStarsData::Instance();
     foreach (SkyObject *o, m_ObjectList)
     {
         if (num)
             o->updateCoords(num);
         o->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     }
 }
 
 SkyObject *ListComponent::findByName(const QString &name)
 {
     foreach (SkyObject *o, m_ObjectList)
     {
         if (QString::compare(o->name(), name, Qt::CaseInsensitive) == 0 ||
             QString::compare(o->longname(), name, Qt::CaseInsensitive) == 0 ||
             QString::compare(o->name2(), name, Qt::CaseInsensitive) == 0)
             return o;
     }
     //No object found
-    return 0;
+    return nullptr;
 }
 
 SkyObject *ListComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
     if (!selected())
-        return 0;
+        return nullptr;
 
-    SkyObject *oBest = 0;
+    SkyObject *oBest = nullptr;
     foreach (SkyObject *o, m_ObjectList)
     {
         double r = o->angularDistanceTo(p).Degrees();
         if (r < maxrad)
         {
             oBest  = o;
             maxrad = r;
         }
     }
     return oBest;
 }
diff --git a/kstars/skycomponents/listcomponent.h b/kstars/skycomponents/listcomponent.h
index b1b4fc5f0..7e92e7f6f 100644
--- a/kstars/skycomponents/listcomponent.h
+++ b/kstars/skycomponents/listcomponent.h
@@ -1,64 +1,64 @@
 /***************************************************************************
                           listcomponent.h  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/10/01
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "skycomponent.h"
 
 #include <QList>
 
 class SkyComposite;
 class SkyMap;
 
 /**
  * @class ListComponent
  * An abstract parent class, to be inherited by SkyComponents that store a QList of SkyObjects.
  *
  * @author Jason Harris
  * @version 0.1
  */
 class ListComponent : public SkyComponent
 {
   public:
     explicit ListComponent(SkyComposite *parent);
 
     ~ListComponent() override;
 
     /**
      * @short Update the sky positions of this component.
      *
      * This function usually just updates the Horizontal (Azimuth/Altitude)
      * coordinates of the objects in this component.  If the KSNumbers*
      * argument is not nullptr, this function also recomputes precession and
      * nutation for the date in KSNumbers.
      * @p num Pointer to the KSNumbers object
      * @note By default, the num parameter is nullptr, indicating that
      * Precession/Nutation computation should be skipped; this computation
      * is only occasionally required.
      */
-    void update(KSNumbers *num = 0) override;
+    void update(KSNumbers *num = nullptr) override;
 
     SkyObject *findByName(const QString &name) override;
     SkyObject *objectNearest(SkyPoint *p, double &maxrad) override;
 
     void clear();
 
     const QList<SkyObject *> &objectList() const { return m_ObjectList; }
 
   protected:
     QList<SkyObject *> m_ObjectList;
 };
diff --git a/kstars/skycomponents/planetmoonscomponent.cpp b/kstars/skycomponents/planetmoonscomponent.cpp
index 591c6db60..3b6946bdd 100644
--- a/kstars/skycomponents/planetmoonscomponent.cpp
+++ b/kstars/skycomponents/planetmoonscomponent.cpp
@@ -1,174 +1,174 @@
 /***************************************************************************
                          planetmoonscomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sat Mar 13 2009
     copyright            : (C) 2009 by Vipul Kumar Singh, Médéric Boquien
     email                : vipulkrsingh@gmail.com, mboquien@free.fr
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "planetmoonscomponent.h"
 
 #include "Options.h"
 #include "kstarsdata.h"
 #include "skylabeler.h"
 #include "skypainter.h"
 #include "solarsystemcomposite.h"
 #include "solarsystemsinglecomponent.h"
 #include "projections/projector.h"
 #include "skyobjects/jupitermoons.h"
 
 PlanetMoonsComponent::PlanetMoonsComponent(SkyComposite *p, SolarSystemSingleComponent *planetComponent,
                                            KSPlanetBase::Planets& _planet)
     : SkyComponent(p), planet(_planet), m_Planet(planetComponent)
 {
     /*
     if (planet == KSPlanetBase::JUPITER)
         pmoons = new JupiterMoons();
     else
         pmoons = new SaturnMoons();
     */
     Q_ASSERT(planet == KSPlanetBase::JUPITER);
 //    delete pmoons;
     //    pmoons = new JupiterMoons();
 //    int nmoons = pmoons->nMoons();
 
 //    for (int i = 0; i < nmoons; ++i)
 //    {
         //        objectNames(SkyObject::MOON).append( pmoons->name(i) );
         //        objectLists(SkyObject::MOON).append( QPair<QString, const SkyObject*>(pmoons->name(i),pmoons->moon(i)) );
 //    }
 }
 
 PlanetMoonsComponent::~PlanetMoonsComponent()
 {
 }
 
 bool PlanetMoonsComponent::selected()
 {
     return m_Planet->selected();
 }
 
 #ifndef KSTARS_LITE
 void PlanetMoonsComponent::update(KSNumbers *)
 {
     KStarsData *data = KStarsData::Instance();
     if (selected())
         pmoons->EquatorialToHorizontal(data->lst(), data->geo()->lat());
 }
 #endif
 
 void PlanetMoonsComponent::updateMoons(KSNumbers *num)
 {
     //FIXME: evil cast
     if (selected())
         pmoons->findPosition(num, m_Planet->planet(), (KSSun *)(parent()->findByName("Sun")));
 }
 
 SkyObject *PlanetMoonsComponent::findByName(const QString &name)
 {
     int nmoons = pmoons->nMoons();
 
     for (int i = 0; i < nmoons; ++i)
     {
         TrailObject *moon = pmoons->moon(i);
         if (QString::compare(moon->name(), name, Qt::CaseInsensitive) == 0 ||
             QString::compare(moon->longname(), name, Qt::CaseInsensitive) == 0 ||
             QString::compare(moon->name2(), name, Qt::CaseInsensitive) == 0)
             return moon;
     }
 
-    return 0;
+    return nullptr;
 }
 
 #ifdef KSTARS_LITE
 KSPlanetBase *PlanetMoonsComponent::getPlanet() const
 {
     return m_Planet->planet();
 }
 #endif
 
 SkyObject *PlanetMoonsComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
     SkyObject *oBest = nullptr;
     int nmoons       = pmoons->nMoons();
 
     if (Options::zoomFactor() < 3000)
         return nullptr;
 
     for (int i = 0; i < nmoons; ++i)
     {
         SkyObject *moon = pmoons->moon(i);
         double r        = moon->angularDistanceTo(p).Degrees();
         if (r < maxrad)
         {
             maxrad = r;
             oBest  = moon;
         }
     }
     return oBest;
 }
 
 void PlanetMoonsComponent::draw(SkyPainter *skyp)
 {
     if (!(planet == KSPlanetBase::JUPITER && Options::showJupiter()))
         return;
 
     //In order to get the z-order right for the moons and the planet,
     //we need to first draw the moons that are further away than the planet,
     //then re-draw the planet, then draw the moons nearer than the planet.
     QList<TrailObject *> frontMoons;
     int nmoons = pmoons->nMoons();
 
     for (int i = 0; i < nmoons; ++i)
     {
         if (pmoons->z(i) < 0.0) //Moon is nearer than the planet
         {
             frontMoons.append(pmoons->moon(i));
         }
         else
         {
             //Draw Moons that are further than the planet
             skyp->drawPointSource(pmoons->moon(i), pmoons->moon(i)->mag());
         }
     }
 
     //Now redraw the planet
     m_Planet->draw(skyp);
 
     //Now draw the remaining moons, as stored in frontMoons
     foreach (TrailObject *moon, frontMoons)
     {
         skyp->drawPointSource(moon, moon->mag());
     }
 
     //Draw Moon name labels if at high zoom
     if (!(Options::showPlanetNames() && Options::zoomFactor() > 50. * MINZOOM))
         return;
     for (int i = 0; i < nmoons; ++i)
     {
         /*
         if (planet ==KSPlanetBase::SATURN)
             SkyLabeler::AddLabel( pmoons->moon(i), SkyLabeler::SATURN_MOON_LABEL );
         else
         */
         SkyLabeler::AddLabel(pmoons->moon(i), SkyLabeler::JUPITER_MOON_LABEL);
     }
 }
 
 void PlanetMoonsComponent::drawTrails(SkyPainter *skyp)
 {
     if (!selected())
         return;
     int nmoons = pmoons->nMoons();
     for (int i = 0; i < nmoons; ++i)
         pmoons->moon(i)->drawTrail(skyp);
 }
diff --git a/kstars/skycomponents/pointlistcomponent.h b/kstars/skycomponents/pointlistcomponent.h
index 479cce870..5e36d4821 100644
--- a/kstars/skycomponents/pointlistcomponent.h
+++ b/kstars/skycomponents/pointlistcomponent.h
@@ -1,62 +1,62 @@
 /***************************************************************************
                           pointlistcomponent.h  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/10/01
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #define NCIRCLE 360 //number of points used to define equator, ecliptic and horizon
 
 #include "skycomponent.h"
 
 #include <QList>
 
 #include <memory>
 
 class SkyPoint;
 
 /**
  * @class PointListComponent
  * An abstract parent class, to be inherited by SkyComponents that store a QList of SkyPoints.
  *
  * @author Jason Harris
  * @version 0.1
  */
 class PointListComponent : public SkyComponent
 {
   public:
     explicit PointListComponent(SkyComposite *parent);
 
     ~PointListComponent() override;
 
     /**
      * @short Update the sky positions of this component.
      *
      * This function usually just updates the Horizontal (Azimuth/Altitude)
      * coordinates of the objects in this component.  However, the precession
      * and nutation must also be recomputed periodically.  Requests to do
      * so are sent through the doPrecess parameter.
      * @p num Pointer to the KSNumbers object
      * @note By default, the num parameter is nullptr, indicating that
      * Precession/Nutation computation should be skipped; this computation
      * is only occasionally required.
      */
-    void update(KSNumbers *num = 0) override;
+    void update(KSNumbers *num = nullptr) override;
 
     QList<std::shared_ptr<SkyPoint>> &pointList() { return m_PointList; }
 
   private:
     QList<std::shared_ptr<SkyPoint>> m_PointList;
 };
diff --git a/kstars/skycomponents/satellitescomponent.cpp b/kstars/skycomponents/satellitescomponent.cpp
index 252acdfc1..48e997a8f 100644
--- a/kstars/skycomponents/satellitescomponent.cpp
+++ b/kstars/skycomponents/satellitescomponent.cpp
@@ -1,260 +1,260 @@
 /***************************************************************************
                           satellitescomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Tue 02 Mar 2011
     copyright            : (C) 2009 by Jerome SONRIER
     email                : jsid@emor3j.fr.eu.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "satellitescomponent.h"
 
 #include "ksfilereader.h"
 #include "ksnotification.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #include "skylabeler.h"
 #include "skymap.h"
 #include "skypainter.h"
 #include "skyobjects/satellite.h"
 
 #include <QNetworkAccessManager>
 #include <QNetworkReply>
 #include <QProgressDialog>
 #include <QtConcurrent>
 
 SatellitesComponent::SatellitesComponent(SkyComposite *parent) : SkyComponent(parent)
 {
     QtConcurrent::run(this, &SatellitesComponent::loadData);
 }
 
 SatellitesComponent::~SatellitesComponent()
 {
     qDeleteAll(m_groups);
     m_groups.clear();
 }
 
 void SatellitesComponent::loadData()
 {
     KSFileReader fileReader;
     QString line;
     QStringList group_infos;
 
     if (!fileReader.open("satellites.dat"))
         return;
 
     emitProgressText(i18n("Loading satellites"));
 
     while (fileReader.hasMoreLines())
     {
         line = fileReader.readLine();
         if (line.trimmed().isEmpty() || line.at(0) == '#')
             continue;
         group_infos = line.split(';');
         m_groups.append(new SatelliteGroup(group_infos.at(0), group_infos.at(1), QUrl(group_infos.at(2))));
     }
 
     objectNames(SkyObject::SATELLITE).clear();
     objectLists(SkyObject::SATELLITE).clear();
 
     foreach (SatelliteGroup *group, m_groups)
     {
         for (int i = 0; i < group->size(); i++)
         {
             Satellite *sat = group->at(i);
 
             if (sat->selected() && nameHash.contains(sat->name().toLower()) == false)
             {
                 objectNames(SkyObject::SATELLITE).append(sat->name());
                 objectLists(SkyObject::SATELLITE).append(QPair<QString, const SkyObject *>(sat->name(), sat));
                 nameHash[sat->name().toLower()] = sat;
             }
         }
     }
 }
 
 bool SatellitesComponent::selected()
 {
     return Options::showSatellites();
 }
 
 void SatellitesComponent::update(KSNumbers *)
 {
     // Return if satellites must not be draw
     if (!selected())
         return;
 
     foreach (SatelliteGroup *group, m_groups)
     {
         group->updateSatellitesPos();
     }
 }
 
 void SatellitesComponent::draw(SkyPainter *skyp)
 {
 #ifndef KSTARS_LITE
     // Return if satellites must not be draw
     if (!selected())
         return;
 
     bool hideLabels = (!Options::showSatellitesLabels() || (SkyMap::Instance()->isSlewing() && Options::hideLabels()));
 
     foreach (SatelliteGroup *group, m_groups)
     {
         for (int i = 0; i < group->size(); i++)
         {
             Satellite *sat = group->at(i);
 
             if (sat->selected())
             {
                 bool drawn = false;
                 if (Options::showVisibleSatellites())
                 {
                     if (sat->isVisible())
                         drawn = skyp->drawSatellite(sat);
                 }
                 else
                 {
                     drawn = skyp->drawSatellite(sat);
                 }
 
                 if (drawn && !hideLabels)
                     SkyLabeler::AddLabel(sat, SkyLabeler::SATELLITE_LABEL);
             }
         }
     }
 #else
     Q_UNUSED(skyp);
 #endif
 }
 
 void SatellitesComponent::drawLabel(Satellite *sat, const QPointF& pos)
 {
     SkyLabeler *labeler = SkyLabeler::Instance();
     labeler->setPen(KStarsData::Instance()->colorScheme()->colorNamed("SatLabelColor"));
     labeler->drawNameLabel(sat, pos);
 }
 
 void SatellitesComponent::drawTrails(SkyPainter *skyp)
 {
     Q_UNUSED(skyp);
 }
 
 void SatellitesComponent::updateTLEs()
 {
     int i = 0;
     QProgressDialog progressDlg(i18n("Update TLEs..."), i18n("Abort"), 0, m_groups.count());
     progressDlg.setWindowModality(Qt::WindowModal);
     progressDlg.setValue(0);
 
     foreach (SatelliteGroup *group, m_groups)
     {
         if (progressDlg.wasCanceled())
             return;
 
         if (group->tleUrl().isEmpty())
             continue;
 
         progressDlg.setLabelText(i18n("Update %1 satellites", group->name()));
         progressDlg.setWindowTitle(i18n("Satellite Orbital Elements Update"));
 
         QNetworkAccessManager manager;
         QNetworkReply *response = manager.get(QNetworkRequest(group->tleUrl()));
 
         // Wait synchronously
         QEventLoop event;
         QObject::connect(response, SIGNAL(finished()), &event, SLOT(quit()));
         event.exec();
 
         if (response->error() == QNetworkReply::NoError)
         {
             QFile file(group->tleFilename().toLocalFile());
             if (file.open(QFile::WriteOnly))
             {
                 file.write(response->readAll());
                 file.close();
                 group->readTLE();
                 group->updateSatellitesPos();
                 progressDlg.setValue(++i);
             }
             else
             {
                 KSNotification::error(file.errorString());
                 return;
             }
         }
         else
         {
             KSNotification::error(response->errorString());
             return;
         }
     }
 }
 
 QList<SatelliteGroup *> SatellitesComponent::groups()
 {
     return m_groups;
 }
 
 Satellite *SatellitesComponent::findSatellite(QString name)
 {
     foreach (SatelliteGroup *group, m_groups)
     {
         for (int i = 0; i < group->size(); i++)
         {
             Satellite *sat = group->at(i);
             if (sat->name() == name)
                 return sat;
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 SkyObject *SatellitesComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
     if (!selected())
-        return 0;
+        return nullptr;
 
     //KStarsData* data = KStarsData::Instance();
 
-    SkyObject *oBest = 0;
+    SkyObject *oBest = nullptr;
     double rBest     = maxrad;
     double r;
 
     foreach (SatelliteGroup *group, m_groups)
     {
         for (int i = 0; i < group->size(); i++)
         {
             Satellite *sat = group->at(i);
             if (!sat->selected())
                 continue;
 
             r = sat->angularDistanceTo(p).Degrees();
             //qDebug() << sat->name();
             //qDebug() << "r = " << r << " - max = " << rBest;
             //qDebug() << "ra2=" << sat->ra().Degrees() << " - dec2=" << sat->dec().Degrees();
             if (r < rBest)
             {
                 rBest = r;
                 oBest = sat;
             }
         }
     }
 
     maxrad = rBest;
     return oBest;
 }
 
 SkyObject *SatellitesComponent::findByName(const QString &name)
 {
     return nameHash[name.toLower()];
 }
diff --git a/kstars/skycomponents/skycomponent.cpp b/kstars/skycomponents/skycomponent.cpp
index 8dafe19cc..7c65045fc 100644
--- a/kstars/skycomponents/skycomponent.cpp
+++ b/kstars/skycomponents/skycomponent.cpp
@@ -1,104 +1,104 @@
 /***************************************************************************
                           skycomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/07/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "skycomponent.h"
 
 #include "Options.h"
 #include "skycomposite.h"
 #include "skyobjects/skyobject.h"
 
 SkyComponent::SkyComponent(SkyComposite *parent) : m_parent(parent)
 {
 }
 
 SkyComponent::~SkyComponent()
 {
 }
 
 //Hand the message up to SkyMapComposite
 void SkyComponent::emitProgressText(const QString &message)
 {
     parent()->emitProgressText(message);
 }
 
 SkyObject *SkyComponent::findByName(const QString &)
 {
-    return 0;
+    return nullptr;
 }
 
 SkyObject *SkyComponent::objectNearest(SkyPoint *, double &)
 {
-    return 0;
+    return nullptr;
 }
 
 void SkyComponent::drawTrails(SkyPainter *)
 {
 }
 
 void SkyComponent::objectsInArea(QList<SkyObject *> &, const SkyRegion &)
 {
 }
 
 QHash<int, QStringList> &SkyComponent::getObjectNames()
 {
     if (!parent())
     {
         // Use a fake list if there is no parent object
         static QHash<int, QStringList> temp;
 
         return temp;
     }
     return parent()->objectNames();
 }
 
 QHash<int, QVector<QPair<QString, const SkyObject *>>> &SkyComponent::getObjectLists()
 {
     if (!parent())
     {
         // Use a fake list if there is no parent object
         static QHash<int, QVector<QPair<QString, const SkyObject *>>> temp;
 
         return temp;
     }
     return parent()->objectLists();
 }
 
 void SkyComponent::removeFromNames(const SkyObject *obj)
 {
     QStringList &names = getObjectNames()[obj->type()];
     int i;
     i = names.indexOf(obj->name());
     if (i >= 0)
         names.removeAt(i);
 
     i = names.indexOf(obj->longname());
     if (i >= 0)
         names.removeAt(i);
 }
 
 void SkyComponent::removeFromLists(const SkyObject *obj)
 {
     QVector<QPair<QString, const SkyObject *>> &names = getObjectLists()[obj->type()];
     int i;
     i = names.indexOf(QPair<QString, const SkyObject *>(obj->name(), obj));
     if (i >= 0)
         names.removeAt(i);
 
     i = names.indexOf(QPair<QString, const SkyObject *>(obj->longname(), obj));
     if (i >= 0)
         names.removeAt(i);
 }
diff --git a/kstars/skycomponents/skycomposite.cpp b/kstars/skycomponents/skycomposite.cpp
index d9b0b3663..fa63aae28 100644
--- a/kstars/skycomponents/skycomposite.cpp
+++ b/kstars/skycomponents/skycomposite.cpp
@@ -1,105 +1,105 @@
 /***************************************************************************
                           skycomposite.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/07/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "skycomposite.h"
 
 #include "skyobjects/skyobject.h"
 
 SkyComposite::SkyComposite(SkyComposite *parent) : SkyComponent(parent)
 {
 }
 
 SkyComposite::~SkyComposite()
 {
     qDeleteAll(components());
     m_Components.clear();
 }
 
 void SkyComposite::addComponent(SkyComponent *component, int priority)
 {
     //qDebug() << "Adding sky component " << component << " of type " << typeid( *component ).name() << " with priority " << priority;
     m_Components.insertMulti(priority, component);
     /*
     foreach( SkyComponent *p, components() ) {
         qDebug() << "List now has: " << p << " of type " << typeid( *p ).name();
     }
     */
 }
 
 void SkyComposite::removeComponent(SkyComponent *const component)
 {
     // qDebug() << "Removing sky component " << component << " of type " << typeid( *component ).name();
     QMap<int, SkyComponent *>::iterator it;
     for (it = m_Components.begin(); it != m_Components.end();)
     {
         if (it.value() == component)
             it = m_Components.erase(it);
         else
             ++it;
     }
     /*
     foreach( SkyComponent *p, components() ) {
         qDebug() << "List now has: " << p << " of type " << typeid( *p ).name();
     }
     */
 }
 
 void SkyComposite::draw(SkyPainter *skyp)
 {
     if (selected())
         foreach (SkyComponent *component, components())
             component->draw(skyp);
 }
 
 void SkyComposite::update(KSNumbers *num)
 {
     foreach (SkyComponent *component, components())
         component->update(num);
 }
 
 SkyObject *SkyComposite::findByName(const QString &name)
 {
     foreach (SkyComponent *comp, components())
     {
         SkyObject *o = comp->findByName(name);
         if (o)
             return o;
     }
-    return 0;
+    return nullptr;
 }
 
 SkyObject *SkyComposite::objectNearest(SkyPoint *p, double &maxrad)
 {
     if (!selected())
-        return 0;
-    SkyObject *oBest = 0;
+        return nullptr;
+    SkyObject *oBest = nullptr;
     foreach (SkyComponent *comp, components())
     {
         // qDebug() << "Checking " << typeid( *comp ).name() <<" for oBest";
         SkyObject *oTry = comp->objectNearest(p, maxrad);
         if (oTry)
         {
             oBest = oTry;
             maxrad =
                 p->angularDistanceTo(oBest).Degrees() *
                 0.95; // Set a new maxrad, smaller than original to give priority to the earlier objects in the list.
             // qDebug() << "oBest = " << oBest << " of type " << typeid( *oTry ).name() << "; updated maxrad = " << maxrad;
         }
     }
     // qDebug() << "Returning best match: oBest = " << oBest;
     return oBest; //will be 0 if no object nearer than maxrad was found
 }
diff --git a/kstars/skycomponents/skycomposite.h b/kstars/skycomponents/skycomposite.h
index 98dc9a198..eab366d59 100644
--- a/kstars/skycomponents/skycomposite.h
+++ b/kstars/skycomponents/skycomposite.h
@@ -1,112 +1,112 @@
 /***************************************************************************
                           skycomposite.h  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/07/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include <QList>
 #include <QMap>
 
 #include "skycomponent.h"
 
 class KSNumbers;
 
 /**
  * @class SkyComposite
  * SkyComposite is a kind of container class for SkyComponent objects. The SkyComposite is
  * responsible for distributing calls to functions like draw() and update() to its children,
  * which can be SkyComponents or other SkyComposites with their own children. This is based
  * on the "composite/component" design pattern.
  *
  * Performance tuning: Sometimes it will be better to override a virtual function and do
  * the work in the composite instead of delegating the request to all sub components.
  *
  * @author Thomas Kabelmann
  * @version 0.1
  */
 class SkyComposite : public SkyComponent
 {
   public:
     /**
      * @short Constructor
      * @p parent pointer to the parent SkyComponent
      */
     explicit SkyComposite(SkyComposite *parent = nullptr);
 
     /** *@short Destructor */
     ~SkyComposite() override;
 
     /**
      * @short Delegate draw requests to all sub components
      * @p psky Reference to the QPainter on which to paint
      */
     void draw(SkyPainter *skyp) override;
 
     /**
      * @short Delegate update-position requests to all sub components
      *
      * This function usually just updates the Horizontal (Azimuth/Altitude) coordinates.
      * However, the precession and nutation must also be recomputed periodically. Requests to
      * do so are sent through the doPrecess parameter.
      * @p num Pointer to the KSNumbers object
      * @sa updatePlanets()
      * @sa updateMoons()
      * @note By default, the num parameter is nullptr, indicating that Precession/Nutation
      * computation should be skipped; this computation is only occasionally required.
      */
-    void update(KSNumbers *num = 0) override;
+    void update(KSNumbers *num = nullptr) override;
 
     /**
      * @short Add a new sub component to the composite
      * @p comp Pointer to the SkyComponent to be added
      * @p priority A priority ordering for various operations on the list of all sky components
      * (notably objectNearest())
      */
     void addComponent(SkyComponent *comp, int priority = 1024);
 
     /**
      * @short Remove a sub component from the composite
      * @p comp Pointer to the SkyComponent to be removed.
      */
     void removeComponent(SkyComponent *const comp);
 
     /**
      * @short Search the children of this SkyComposite for a SkyObject whose name matches
      * the argument.
      *
      * The objects' primary, secondary and long-form names will all be checked for a match.
      * @p name the name to be matched
      * @return a pointer to the SkyObject whose name matches
      * the argument, or a nullptr pointer if no match was found.
      */
     SkyObject *findByName(const QString &name) override;
 
     /**
      * @short Identify the nearest SkyObject to the given SkyPoint, among the children of
      * this SkyComposite
      * @p p pointer to the SkyPoint around which to search.
      * @p maxrad reference to current search radius
      * @return a pointer to the nearest SkyObject
      */
     SkyObject *objectNearest(SkyPoint *p, double &maxrad) override;
 
     QList<SkyComponent *> components() { return m_Components.values(); }
 
     QMap<int, SkyComponent *> &componentsWithPriorities() { return m_Components; }
 
   private:
     QMap<int, SkyComponent *> m_Components;
 };
diff --git a/kstars/skycomponents/skymapcomposite.cpp b/kstars/skycomponents/skymapcomposite.cpp
index f92cf30b7..5f7ebd49f 100644
--- a/kstars/skycomponents/skymapcomposite.cpp
+++ b/kstars/skycomponents/skymapcomposite.cpp
@@ -1,934 +1,934 @@
 /***************************************************************************
                           skymapcomposite.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/07/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "skymapcomposite.h"
 
 #include "artificialhorizoncomponent.h"
 #include "catalogcomponent.h"
 #include "constellationartcomponent.h"
 #include "constellationboundarylines.h"
 #include "constellationlines.h"
 #include "constellationnamescomponent.h"
 #include "culturelist.h"
 #include "deepskycomponent.h"
 #include "deepstarcomponent.h"
 #include "ecliptic.h"
 #include "equator.h"
 #include "equatorialcoordinategrid.h"
 #include "horizoncomponent.h"
 #include "horizontalcoordinategrid.h"
 #include "ksasteroid.h"
 #include "kscomet.h"
 #ifndef KSTARS_LITE
 #include "kstars.h"
 #endif
 #include "kstarsdata.h"
 #include "milkyway.h"
 #include "satellitescomponent.h"
 #include "skylabeler.h"
 #include "skypainter.h"
 #include "solarsystemcomposite.h"
 #include "starcomponent.h"
 #include "supernovaecomponent.h"
 #include "syncedcatalogcomponent.h"
 #include "targetlistcomponent.h"
 #include "projections/projector.h"
 #include "skyobjects/deepskyobject.h"
 #include "skyobjects/ksplanet.h"
 #include "skyobjects/constellationsart.h"
 
 #ifndef KSTARS_LITE
 #include "flagcomponent.h"
 #include "ksutils.h"
 #include "observinglist.h"
 #include "skymap.h"
 #include "hipscomponent.h"
 #endif
 
 #include <QApplication>
 
 #include <kstars_debug.h>
 
 SkyMapComposite::SkyMapComposite(SkyComposite *parent) : SkyComposite(parent), m_reindexNum(J2000)
 {
     m_skyLabeler.reset(SkyLabeler::Instance());
     m_skyMesh.reset(SkyMesh::Create(3)); // level 5 mesh = 8192 trixels
     m_skyMesh->debug(0);
 //  1 => print "indexing ..."
 //  2 => prints totals too
 // 10 => prints detailed lists
 // You can also set the debug level of individual
 // appendLine() and appendPoly() calls.
 
 //Add all components
 //Stars must come before constellation lines
 #ifdef KSTARS_LITE
     addComponent(m_MilkyWay = new MilkyWay(this), 50);
     addComponent(m_Stars = StarComponent::Create(this), 10);
     addComponent(m_EquatorialCoordinateGrid = new EquatorialCoordinateGrid(this));
     addComponent(m_HorizontalCoordinateGrid = new HorizontalCoordinateGrid(this));
 
     // Do add to components.
     addComponent(m_CBoundLines = new ConstellationBoundaryLines(this), 80);
     m_Cultures.reset(new CultureList());
     addComponent(m_CLines = new ConstellationLines(this, m_Cultures.get()), 85);
     addComponent(m_CNames = new ConstellationNamesComponent(this, m_Cultures.get()), 90);
     addComponent(m_Equator = new Equator(this), 95);
     addComponent(m_Ecliptic = new Ecliptic(this), 95);
     addComponent(m_Horizon = new HorizonComponent(this), 100);
     addComponent(m_DeepSky = new DeepSkyComponent(this), 5);
     addComponent(m_ConstellationArt = new ConstellationArtComponent(this, m_Cultures.get()), 100);
 
     addComponent(m_ArtificialHorizon = new ArtificialHorizonComponent(this), 110);
 
     m_internetResolvedCat = "_Internet_Resolved";
     m_manualAdditionsCat  = "_Manual_Additions";
     addComponent(m_internetResolvedComponent = new SyncedCatalogComponent(this, m_internetResolvedCat, true, 0), 6);
     addComponent(m_manualAdditionsComponent = new SyncedCatalogComponent(this, m_manualAdditionsCat, true, 0), 6);
     m_CustomCatalogs.reset(new SkyComposite(this));
     QStringList allcatalogs = Options::showCatalogNames();
 
     if (!allcatalogs.contains(m_internetResolvedCat))
     {
         allcatalogs.append(m_internetResolvedCat);
     }
     if (!allcatalogs.contains(m_manualAdditionsCat))
     {
         allcatalogs.append(m_manualAdditionsCat);
     }
     Options::setShowCatalogNames(allcatalogs);
 
     for (int i = 0; i < allcatalogs.size(); ++i)
     {
         if (allcatalogs.at(i) == m_internetResolvedCat ||
             allcatalogs.at(i) == m_manualAdditionsCat) // This is a special catalog
             continue;
         m_CustomCatalogs->addComponent(new CatalogComponent(this, allcatalogs.at(i), false, i),
                                        6); // FIXME: Should this be 6 or 5? See SkyMapComposite::reloadDeepSky()
     }
 
     addComponent(m_SolarSystem = new SolarSystemComposite(this), 2);
 
     //addComponent( m_ObservingList = new TargetListComponent( this , 0, QPen(),
     //                                                       &Options::obsListSymbol, &Options::obsListText ), 120 );
     addComponent(m_StarHopRouteList = new TargetListComponent(this, 0, QPen()), 130);
     addComponent(m_Satellites = new SatellitesComponent(this), 7);
     addComponent(m_Supernovae = new SupernovaeComponent(this), 7);
     SkyMapLite::Instance()->loadingFinished();
 #else
     addComponent(m_MilkyWay = new MilkyWay(this), 50);
     addComponent(m_Stars = StarComponent::Create(this), 10);
     addComponent(m_EquatorialCoordinateGrid = new EquatorialCoordinateGrid(this));
     addComponent(m_HorizontalCoordinateGrid = new HorizontalCoordinateGrid(this));
 
     // Do add to components.
     addComponent(m_CBoundLines = new ConstellationBoundaryLines(this), 80);
     m_Cultures.reset(new CultureList());
     addComponent(m_CLines = new ConstellationLines(this, m_Cultures.get()), 85);
     addComponent(m_CNames = new ConstellationNamesComponent(this, m_Cultures.get()), 90);
     addComponent(m_Equator = new Equator(this), 95);
     addComponent(m_Ecliptic = new Ecliptic(this), 95);
     addComponent(m_Horizon = new HorizonComponent(this), 100);
     addComponent(m_DeepSky = new DeepSkyComponent(this), 5);
     addComponent(m_ConstellationArt = new ConstellationArtComponent(this, m_Cultures.get()), 100);
 
     // Hips
     addComponent(m_HiPS = new HIPSComponent(this));
 
     addComponent(m_ArtificialHorizon = new ArtificialHorizonComponent(this), 110);
 
     m_internetResolvedCat = "_Internet_Resolved";
     m_manualAdditionsCat  = "_Manual_Additions";
     addComponent(m_internetResolvedComponent = new SyncedCatalogComponent(this, m_internetResolvedCat, true, 0), 6);
     addComponent(m_manualAdditionsComponent = new SyncedCatalogComponent(this, m_manualAdditionsCat, true, 0), 6);
     m_CustomCatalogs.reset(new SkyComposite(this));
     QStringList allcatalogs = Options::showCatalogNames();
     for (int i = 0; i < allcatalogs.size(); ++i)
     {
         if (allcatalogs.at(i) == m_internetResolvedCat ||
             allcatalogs.at(i) == m_manualAdditionsCat) // This is a special catalog
             continue;
         m_CustomCatalogs->addComponent(new CatalogComponent(this, allcatalogs.at(i), false, i),
                                        6); // FIXME: Should this be 6 or 5? See SkyMapComposite::reloadDeepSky()
     }
 
     addComponent(m_SolarSystem = new SolarSystemComposite(this), 2);
 
     addComponent(m_Flags = new FlagComponent(this), 4);       
 
     addComponent(m_ObservingList =
-                     new TargetListComponent(this, 0, QPen(), &Options::obsListSymbol, &Options::obsListText),
+                     new TargetListComponent(this, nullptr, QPen(), &Options::obsListSymbol, &Options::obsListText),
                  120);
-    addComponent(m_StarHopRouteList = new TargetListComponent(this, 0, QPen()), 130);
+    addComponent(m_StarHopRouteList = new TargetListComponent(this, nullptr, QPen()), 130);
     addComponent(m_Satellites = new SatellitesComponent(this), 7);
     addComponent(m_Supernovae = new SupernovaeComponent(this), 7);
 #endif
     connect(this, SIGNAL(progressText(QString)), KStarsData::Instance(), SIGNAL(progressText(QString)));
 }
 
 SkyMapComposite::~SkyMapComposite()
 {
 }
 
 void SkyMapComposite::update(KSNumbers *num)
 {
     //printf("updating SkyMapComposite\n");
     //1. Milky Way
     //m_MilkyWay->update( data, num );
     //2. Coordinate grid
     //m_EquatorialCoordinateGrid->update( num );
     m_HorizontalCoordinateGrid->update(num);
     //3. Constellation boundaries
     //m_CBounds->update( data, num );
     //4. Constellation lines
     //m_CLines->update( data, num );
     //5. Constellation names
     if (m_CNames)
         m_CNames->update(num);
     //6. Equator
     //m_Equator->update( data, num );
     //7. Ecliptic
     //m_Ecliptic->update( data, num );
     //8. Deep sky
     //m_DeepSky->update( data, num );
     //9. Custom catalogs
     m_CustomCatalogs->update(num);
     m_internetResolvedComponent->update(num);
     m_manualAdditionsComponent->update(num);
     //10. Stars
     //m_Stars->update( data, num );
     //m_CLines->update( data, num );  // MUST follow stars.
 
     //12. Solar system
     m_SolarSystem->update(num);
     //13. Satellites
     m_Satellites->update(num);
     //14. Supernovae
     m_Supernovae->update(num);
     //15. Horizon
     m_Horizon->update(num);
 #ifndef KSTARS_LITE
     //16. Flags
     m_Flags->update(num);
 #endif
 }
 
 void SkyMapComposite::updateSolarSystemBodies(KSNumbers *num)
 {
     m_SolarSystem->updateSolarSystemBodies(num);
 }
 
 /*
 void SkyMapComposite::updateMoons(KSNumbers *num )
 {
     m_SolarSystem->updateMoons( num );
 }
 */
 
 //Reimplement draw function so that we have control over the order of
 //elements, and we can add object labels
 //
 //The order in which components are drawn naturally determines the
 //z-ordering (the layering) of the components.  Objects which
 //should appear "behind" others should be drawn first.
 void SkyMapComposite::draw(SkyPainter *skyp)
 {
     Q_UNUSED(skyp)
 #ifndef KSTARS_LITE
     SkyMap *map      = SkyMap::Instance();
     KStarsData *data = KStarsData::Instance();
 
     // We delay one draw cycle before re-indexing
     // we MUST ensure CLines do not get re-indexed while we use DRAW_BUF
     // so we do it here.
     m_CLines->reindex(&m_reindexNum);
     // This queues re-indexing for the next draw cycle
     m_reindexNum = KSNumbers(data->updateNum()->julianDay());
 
     // This ensures that the JIT updates are synchronized for the entire draw
     // cycle so the sky moves as a single sheet.  May not be needed.
     data->syncUpdateIDs();
 
     // prepare the aperture
     // FIXME_FOV: We may want to rejigger this to allow
     // wide-angle views --hdevalence
     float radius = map->projector()->fov();
     if (radius > 180.0)
         radius = 180.0;
 
     if (m_skyMesh->inDraw())
     {
         printf("Warning: aborting concurrent SkyMapComposite::draw()\n");
         return;
     }
 
     m_skyMesh->inDraw(true);
     SkyPoint *focus = map->focus();
     m_skyMesh->aperture(focus, radius + 1.0, DRAW_BUF); // divide by 2 for testing
 
     // create the no-precess aperture if needed
     if (Options::showEquatorialGrid() || Options::showHorizontalGrid() || Options::showCBounds() ||
         Options::showEquator())
     {
         m_skyMesh->index(focus, radius + 1.0, NO_PRECESS_BUF);
     }
 
     // clear marks from old labels and prep fonts
     m_skyLabeler->reset(map);
     m_skyLabeler->useStdFont();
 
     // info boxes have highest label priority
     // FIXME: REGRESSION. Labeler now know nothing about infoboxes
     // map->infoBoxes()->reserveBoxes( psky );
 
     // JM 2016-12-01: Why is this done this way?!! It's too inefficient
     if (KStars::Instance())
     {
         auto &obsList = KStarsData::Instance()->observingList()->sessionList();
 
         if (Options::obsListText())
             for (auto &obj_clone : obsList)
             {
                 // Find the "original" obj
                 SkyObject *o = findByName(obj_clone->name()); // FIXME: This is sloww.... and can also fail!!!
                 if (!o)
                     continue;
                 SkyLabeler::AddLabel(o, SkyLabeler::RUDE_LABEL);
             }
     }
 
     m_MilkyWay->draw(skyp);
 
     // Draw HIPS after milky way but before everything else
     m_HiPS->draw(skyp);
 
     m_EquatorialCoordinateGrid->draw(skyp);
     m_HorizontalCoordinateGrid->draw(skyp);
 
     //Draw constellation boundary lines only if we draw western constellations
     if (m_Cultures->current() == "Western")
     {
         m_CBoundLines->draw(skyp);
         m_ConstellationArt->draw(skyp);
     }
     else if (m_Cultures->current() == "Inuit")
     {
         m_ConstellationArt->draw(skyp);
     }
 
     m_CLines->draw(skyp);
 
     m_Equator->draw(skyp);
 
     m_Ecliptic->draw(skyp);
 
     m_DeepSky->draw(skyp);
 
     m_CustomCatalogs->draw(skyp);
     m_internetResolvedComponent->draw(skyp);
     m_manualAdditionsComponent->draw(skyp);
 
     m_Stars->draw(skyp);
 
     m_SolarSystem->drawTrails(skyp);
     m_SolarSystem->draw(skyp);
 
     m_Satellites->draw(skyp);
 
     m_Supernovae->draw(skyp);
 
     map->drawObjectLabels(labelObjects());
 
     m_skyLabeler->drawQueuedLabels();
     m_CNames->draw(skyp);
     m_Stars->drawLabels();
     m_DeepSky->drawLabels();
 
     m_ObservingList->pen = QPen(QColor(data->colorScheme()->colorNamed("ObsListColor")), 1.);
     if (KStars::Instance() && !m_ObservingList->list)
         m_ObservingList->list.reset(new SkyObjectList(KSUtils::makeVanillaPointerList(
             KStarsData::Instance()
                 ->observingList()
                 ->sessionList()))); // Make sure we never delete the pointers in m_ObservingList->list!
 
     m_ObservingList->draw(skyp);
 
     m_Flags->draw(skyp);
 
     m_StarHopRouteList->pen = QPen(QColor(data->colorScheme()->colorNamed("StarHopRouteColor")), 1.);
     m_StarHopRouteList->draw(skyp);
 
     m_ArtificialHorizon->draw(skyp);
 
     m_Horizon->draw(skyp);
 
     m_skyMesh->inDraw(false);
 
 // DEBUG Edit. Keywords: Trixel boundaries. Currently works only in QPainter mode
 // -jbb uncomment these to see trixel outlines:
 /*
     QPainter *psky = dynamic_cast< QPainter *>( skyp );
     if( psky ) {
         qCDebug(KSTARS) << "Drawing trixel boundaries for debugging.";
         psky->setPen(  QPen( QBrush( QColor( "yellow" ) ), 1, Qt::SolidLine ) );
         m_skyMesh->draw( *psky, OBJ_NEAREST_BUF );
         SkyMesh *p;
         if( p = SkyMesh::Instance( 6 ) ) {
             qCDebug(KSTARS) << "We have a deep sky mesh to draw";
             p->draw( *psky, OBJ_NEAREST_BUF );
         }
 
         psky->setPen( QPen( QBrush( QColor( "green" ) ), 1, Qt::SolidLine ) );
         m_skyMesh->draw( *psky, NO_PRECESS_BUF );
         if( p )
             p->draw( *psky, NO_PRECESS_BUF );
     }
     */
 #endif
 }
 
 //Select nearest object to the given skypoint, but give preference
 //to certain object types.
 //we multiply each object type's smallest angular distance by the
 //following factors before selecting the final nearest object:
 // faint stars = 1.0 (not weighted)
 // stars brighter than 4th mag = 0.75
 // IC catalog = 0.8
 // NGC catalog = 0.6
 // "other" catalog = 0.6
 // Messier object = 0.5
 // custom object = 0.5
 // Solar system = 0.25
 SkyObject *SkyMapComposite::objectNearest(SkyPoint *p, double &maxrad)
 {
     double rTry      = maxrad;
     double rBest     = maxrad;
-    SkyObject *oTry  = 0;
-    SkyObject *oBest = 0;
+    SkyObject *oTry  = nullptr;
+    SkyObject *oBest = nullptr;
 
     //printf("%.1f %.1f\n", p->ra().Degrees(), p->dec().Degrees() );
     m_skyMesh->aperture(p, maxrad + 1.0, OBJ_NEAREST_BUF);
 
     oBest = m_Stars->objectNearest(p, rBest);
     //reduce rBest by 0.75 for stars brighter than 4th mag
     if (oBest && oBest->mag() < 4.0)
         rBest *= 0.75;
     else if (oBest && oBest->mag() > 12.0)
         rBest *= 1.25;
 
     // TODO: Add support for deep star catalogs
 
     //m_DeepSky internally discriminates among deepsky catalogs
     //and renormalizes rTry
     oTry = m_DeepSky->objectNearest(p, rTry);
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     for (int i = 0; i < m_DeepStars.size(); ++i)
     {
         rTry = maxrad;
         oTry = m_DeepStars.at(i)->objectNearest(p, rTry);
         if (rTry < rBest)
         {
             rBest = rTry;
             oBest = oTry;
         }
     }
 
     rTry = maxrad;
     oTry = m_CustomCatalogs->objectNearest(p, rTry);
     rTry *= 0.5;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
     oTry = m_internetResolvedComponent->objectNearest(p, rTry);
     rTry *= 0.5;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
     oTry = m_manualAdditionsComponent->objectNearest(p, rTry);
     rTry *= 0.5;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
     oTry = m_SolarSystem->objectNearest(p, rTry);
     if (!dynamic_cast<KSComet *>(oTry) &&
         !dynamic_cast<KSAsteroid *>(
             oTry)) // There are gazillions of faint asteroids and comets; we want to prevent them from getting precedence
     {
         rTry *= 0.25; // this is either sun, moon, or one of the major planets or their moons.
     }
     else
     {
         if (std::isfinite(oTry->mag()) && oTry->mag() < 12.0)
         {
             rTry *= 0.75; // Bright comets / asteroids get some precedence.
         }
     }
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
     oTry = m_Satellites->objectNearest(p, rTry);
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     rTry = maxrad;
     oTry = m_Supernovae->objectNearest(p, rTry);
     //qCDebug(KSTARS)<<rTry<<rBest<<maxrad;
     if (rTry < rBest)
     {
         rBest = rTry;
         oBest = oTry;
     }
 
     //if ( oBest && Options::verboseLogging())
     //qCDebug(KSTARS) << "OBEST=" << oBest->name() << " - " << oBest->name2();
     maxrad = rBest;
     return oBest; //will be 0 if no object nearer than maxrad was found
 }
 
 SkyObject *SkyMapComposite::starNearest(SkyPoint *p, double &maxrad)
 {
     double rtry     = maxrad;
-    SkyObject *star = 0;
+    SkyObject *star = nullptr;
 
     m_skyMesh->aperture(p, maxrad + 1.0, OBJ_NEAREST_BUF);
 
     star = m_Stars->objectNearest(p, rtry);
     //reduce rBest by 0.75 for stars brighter than 4th mag
     if (star && star->mag() < 4.0)
         rtry *= 0.75;
 
     // TODO: Add Deep Star Catalog support
 
     maxrad = rtry;
     return star;
 }
 
 bool SkyMapComposite::addNameLabel(SkyObject *o)
 {
     if (!o)
         return false;
     labelObjects().append(o);
     return true;
 }
 
 bool SkyMapComposite::removeNameLabel(SkyObject *o)
 {
     if (!o)
         return false;
     int index = labelObjects().indexOf(o);
     if (index < 0)
         return false;
     labelObjects().removeAt(index);
     return true;
 }
 
 QHash<int, QStringList> &SkyMapComposite::getObjectNames()
 {
     return m_ObjectNames;
 }
 
 QHash<int, QVector<QPair<QString, const SkyObject *>>> &SkyMapComposite::getObjectLists()
 {
     return m_ObjectLists;
 }
 
 QList<SkyObject *> SkyMapComposite::findObjectsInArea(const SkyPoint &p1, const SkyPoint &p2)
 {
     const SkyRegion &region = m_skyMesh->skyRegion(p1, p2);
     QList<SkyObject *> list;
     // call objectsInArea( QList<SkyObject*>&, const SkyRegion& ) for each of the
     // components of the SkyMapComposite
     if (m_Stars->selected())
         m_Stars->objectsInArea(list, region);
     if (m_DeepSky->selected())
         m_DeepSky->objectsInArea(list, region);
     return list;
 }
 
 SkyObject *SkyMapComposite::findByName(const QString &name)
 {
 #ifndef KSTARS_LITE
     if (KStars::Closing)
         return nullptr;
 #endif
 
     //We search the children in an "intelligent" order (most-used
     //object types first), in order to avoid wasting too much time
     //looking for a match.  The most important part of this ordering
     //is that stars should be last (because the stars list is so long)
-    SkyObject *o = 0;
+    SkyObject *o = nullptr;
     o            = m_SolarSystem->findByName(name);
     if (o)
         return o;
     o = m_DeepSky->findByName(name);
     if (o)
         return o;
     o = m_CustomCatalogs->findByName(name);
     if (o)
         return o;
     o = m_internetResolvedComponent->findByName(name);
     if (o)
         return o;
     o = m_manualAdditionsComponent->findByName(name);
     if (o)
         return o;
     o = m_CNames->findByName(name);
     if (o)
         return o;
     o = m_Stars->findByName(name);
     if (o)
         return o;
     o = m_Supernovae->findByName(name);
     if (o)
         return o;
     o = m_Satellites->findByName(name);
     if (o)
         return o;
 
-    return 0;
+    return nullptr;
 }
 
 SkyObject *SkyMapComposite::findStarByGenetiveName(const QString name)
 {
     return m_Stars->findStarByGenetiveName(name);
 }
 
 KSPlanetBase *SkyMapComposite::planet(int n)
 {
     if (n == KSPlanetBase::SUN)
         return (KSPlanetBase *)(m_SolarSystem->findByName("Sun"));
     if (n == KSPlanetBase::MERCURY)
         return (KSPlanetBase *)(m_SolarSystem->findByName(i18n("Mercury")));
     if (n == KSPlanetBase::VENUS)
         return (KSPlanetBase *)(m_SolarSystem->findByName(i18n("Venus")));
     if (n == KSPlanetBase::MOON)
         return (KSPlanetBase *)(m_SolarSystem->findByName("Moon"));
     if (n == KSPlanetBase::MARS)
         return (KSPlanetBase *)(m_SolarSystem->findByName(i18n("Mars")));
     if (n == KSPlanetBase::JUPITER)
         return (KSPlanetBase *)(m_SolarSystem->findByName(i18n("Jupiter")));
     if (n == KSPlanetBase::SATURN)
         return (KSPlanetBase *)(m_SolarSystem->findByName(i18n("Saturn")));
     if (n == KSPlanetBase::URANUS)
         return (KSPlanetBase *)(m_SolarSystem->findByName(i18n("Uranus")));
     if (n == KSPlanetBase::NEPTUNE)
         return (KSPlanetBase *)(m_SolarSystem->findByName(i18n("Neptune")));
     //if ( n == KSPlanetBase::PLUTO ) return (KSPlanetBase*)(m_SolarSystem->findByName( i18n( "Pluto" ) ) );
 
-    return 0;
+    return nullptr;
 }
 
 void SkyMapComposite::addCustomCatalog(const QString &filename, int index)
 {
     CatalogComponent *cc = new CatalogComponent(this, filename, false, index);
     if (cc->objectList().size())
     {
         m_CustomCatalogs->addComponent(cc);
     }
     else
     {
         delete cc;
     }
 }
 
 void SkyMapComposite::removeCustomCatalog(const QString &name)
 {
     foreach (SkyComponent *sc, m_CustomCatalogs->components())
     {
         CatalogComponent *ccc = (CatalogComponent *)sc;
 
         if (ccc->name() == name)
         {
             m_CustomCatalogs->removeComponent(ccc);
             return;
         }
     }
 
     qWarning() << i18n("Could not find custom catalog component named %1.", name);
 }
 
 void SkyMapComposite::reloadCLines()
 {
 #ifndef KSTARS_LITE
     Q_ASSERT(!SkyMapDrawAbstract::drawLock());
     SkyMapDrawAbstract::setDrawLock(
         true); // This is not (yet) multithreaded, so I think we don't have to worry about overwriting the state of an existing lock --asimha
     removeComponent(m_CLines);
     delete m_CLines;
     addComponent(m_CLines = new ConstellationLines(this, m_Cultures.get()));
     SkyMapDrawAbstract::setDrawLock(false);
 #endif
 }
 
 void SkyMapComposite::reloadCNames()
 {
     //     Q_ASSERT( !SkyMapDrawAbstract::drawLock() );
     //     SkyMapDrawAbstract::setDrawLock( true ); // This is not (yet) multithreaded, so I think we don't have to worry about overwriting the state of an existing lock --asimha
     //     objectNames(SkyObject::CONSTELLATION).clear();
     //     delete m_CNames;
     //     m_CNames = 0;
     //     m_CNames = new ConstellationNamesComponent( this, m_Cultures.get() );
     //     SkyMapDrawAbstract::setDrawLock( false );
     objectNames(SkyObject::CONSTELLATION).clear();
     removeComponent(m_CNames);
     delete m_CNames;
     addComponent(m_CNames = new ConstellationNamesComponent(this, m_Cultures.get()));
 }
 
 void SkyMapComposite::reloadConstellationArt()
 {
 #ifndef KSTARS_LITE
     Q_ASSERT(!SkyMapDrawAbstract::drawLock());
     SkyMapDrawAbstract::setDrawLock(true);
     removeComponent(m_ConstellationArt);
     delete m_ConstellationArt;
     addComponent(m_ConstellationArt = new ConstellationArtComponent(this, m_Cultures.get()));
     SkyMapDrawAbstract::setDrawLock(false);
 #endif
 }
 
 void SkyMapComposite::reloadDeepSky()
 {
 #ifndef KSTARS_LITE
     Q_ASSERT(!SkyMapDrawAbstract::drawLock());
 
     // Deselect object if selected! If not deselected then InfoBox tries to
     // get the name of an object which may not exist (getLongName)
     // FIXME (spacetime): Is there a better way?
     // Current Solution: Look for the nearest star in the region and select it.
 
     SkyMap *current_map   = KStars::Instance()->map();
     double maxrad         = 30.0;
     SkyPoint center_point = current_map->getCenterPoint();
 
     current_map->setClickedObject(KStars::Instance()->data()->skyComposite()->starNearest(&center_point, maxrad));
     current_map->setClickedPoint(current_map->clickedObject());
     current_map->slotCenter();
 
     // Remove and Regenerate set of catalog objects
     //
     // FIXME: Why should we do this? Because it messes up observing
     // list really bad to delete and regenerate SkyObjects.
     SkyMapDrawAbstract::setDrawLock(true);
     m_CustomCatalogs.reset(new SkyComposite(this));
     removeComponent(m_internetResolvedComponent);
     delete m_internetResolvedComponent;
     addComponent(m_internetResolvedComponent = new SyncedCatalogComponent(this, m_internetResolvedCat, true, 0), 6);
     removeComponent(m_manualAdditionsComponent);
     delete m_manualAdditionsComponent;
     addComponent(m_manualAdditionsComponent = new SyncedCatalogComponent(this, m_manualAdditionsCat, true, 0), 6);
     QStringList allcatalogs = Options::showCatalogNames();
 
     for (int i = 0; i < allcatalogs.size(); ++i)
     {
         if (allcatalogs.at(i) == m_internetResolvedCat ||
             allcatalogs.at(i) == m_manualAdditionsCat) // These are special catalogs
             continue;
         m_CustomCatalogs->addComponent(new CatalogComponent(this, allcatalogs.at(i), false, i),
                                        5); // FIXME: Should this be 6 or 5? See SkyMapComposite::SkyMapComposite()
     }
 
     // FIXME: We should also reload anything that refers to SkyObject
     // * in memory, because all the old SkyObjects are now gone! This
     // includes the observing list. Otherwise, expect a bad, bad crash
     // that is hard to debug! -- AS
 
     SkyMapDrawAbstract::setDrawLock(false);
 #endif
 }
 
 bool SkyMapComposite::isLocalCNames()
 {
     return m_CNames->isLocalCNames();
 }
 
 void SkyMapComposite::emitProgressText(const QString &message)
 {
     emit progressText(message);
 #ifndef Q_OS_ANDROID
     //Can cause crashes on Android, investigate it
     qApp->processEvents(); // -jbb: this seemed to make it work.
 #endif
     //qCDebug(KSTARS) << QString("PROGRESS TEXT: %1\n").arg( message );
 }
 
 const QList<DeepSkyObject *> &SkyMapComposite::deepSkyObjects() const
 {
     return m_DeepSky->objectList();
 }
 
 const QList<SkyObject *> &SkyMapComposite::constellationNames() const
 {
     return m_CNames->objectList();
 }
 
 // Returns only named stars, and should not be used
 const QList<SkyObject *> &SkyMapComposite::stars() const
 {
     return m_Stars->objectList();
 }
 
 const QList<SkyObject *> &SkyMapComposite::asteroids() const
 {
     return m_SolarSystem->asteroids();
 }
 
 const QList<SkyObject *> &SkyMapComposite::comets() const
 {
     return m_SolarSystem->comets();
 }
 
 const QList<SkyObject *> &SkyMapComposite::supernovae() const
 {
     return m_Supernovae->objectList();
 }
 
 QList<SkyObject *> SkyMapComposite::planets()
 {
     return solarSystemComposite()->planetObjects();
 }
 
 //Store it permanently
 /*
 QList<SkyObject*> SkyMapComposite::moons()
 {
     QList<SkyObject*> skyObjects;
     foreach(PlanetMoonsComponent *pMoons, m_SolarSystem->planetMoonsComponent()) {
         PlanetMoons *moons = pMoons->getMoons();
         for(int i = 0; i < moons->nMoons(); ++i) {
             skyObjects.append(moons->moon(i));
         }
     }
     return skyObjects;
 }
 */
 
 const QList<SkyObject *> *SkyMapComposite::getSkyObjectsList(SkyObject::TYPE t)
 {
     switch (t)
     {
         case SkyObject::STAR:
             return &m_Stars->objectList();
             break;
         case SkyObject::CATALOG_STAR:
             return nullptr;
             break;
         case SkyObject::PLANET:
             return &m_SolarSystem->planetObjects();
             break;
         case SkyObject::COMET:
             return &comets();
             break;
         case SkyObject::ASTEROID:
             return &asteroids();
             break;
         case SkyObject::MOON:
             return &m_SolarSystem->moons();
             break;
         case SkyObject::GALAXY:
         case SkyObject::PLANETARY_NEBULA:
         case SkyObject::GASEOUS_NEBULA:
         case SkyObject::GLOBULAR_CLUSTER:
         case SkyObject::OPEN_CLUSTER:
             return nullptr;
             break;
         case SkyObject::CONSTELLATION:
             return &constellationNames();
             break;
         case SkyObject::SUPERNOVA:
             return &supernovae();
             break;
         default:
             return nullptr;
     }
     //return nullptr;
 }
 
 KSPlanet *SkyMapComposite::earth()
 {
     return m_SolarSystem->earth();
 }
 
 QList<SkyComponent *> SkyMapComposite::customCatalogs()
 {
     return m_CustomCatalogs->components();
 }
 
 QStringList SkyMapComposite::getCultureNames()
 {
     return m_Cultures->getNames();
 }
 
 QString SkyMapComposite::getCultureName(int index)
 {
     return m_Cultures->getName(index);
 }
 
 void SkyMapComposite::setCurrentCulture(QString culture)
 {
     m_Cultures->setCurrent(culture);
 }
 
 QString SkyMapComposite::currentCulture()
 {
     return m_Cultures->current();
 }
 #ifndef KSTARS_LITE
 FlagComponent *SkyMapComposite::flags()
 {
     return m_Flags;
 }
 #endif
 
 SatellitesComponent *SkyMapComposite::satellites()
 {
     return m_Satellites;
 }
 
 SupernovaeComponent *SkyMapComposite::supernovaeComponent()
 {
     return m_Supernovae;
 }
 
 ArtificialHorizonComponent *SkyMapComposite::artificialHorizon()
 {
     return m_ArtificialHorizon;
 }
diff --git a/kstars/skycomponents/skymapcomposite.h b/kstars/skycomponents/skymapcomposite.h
index 9de4df102..6a3347881 100644
--- a/kstars/skycomponents/skymapcomposite.h
+++ b/kstars/skycomponents/skymapcomposite.h
@@ -1,280 +1,280 @@
 /***************************************************************************
                           skymapcomposite.h  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/07/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "skycomposite.h"
 #include "ksnumbers.h"
 #include "skyobject.h"
 
 #include <QList>
 
 #include <memory>
 
 class QPolygonF;
 
 class ArtificialHorizonComponent;
 class ConstellationArtComponent;
 class ConstellationBoundaryLines;
 class ConstellationLines;
 class ConstellationNamesComponent;
 class ConstellationsArt;
 class CultureList;
 class DeepSkyComponent;
 class DeepSkyObject;
 class DeepStarComponent;
 class Ecliptic;
 class Equator;
 class EquatorialCoordinateGrid;
 class FlagComponent;
 class HorizontalCoordinateGrid;
 class HorizonComponent;
 class KSPlanet;
 class KSPlanetBase;
 class MilkyWay;
 class SatellitesComponent;
 class SkyLabeler;
 class SkyMap;
 class SkyMesh;
 class SkyObject;
 class SolarSystemComposite;
 class StarComponent;
 class SupernovaeComponent;
 class SyncedCatalogComponent;
 class TargetListComponent;
 class HIPSComponent;
 
 /**
  * @class SkyMapComposite
  * SkyMapComposite is the root object in the object hierarchy of the sky map.
  * All requests to update, init, draw etc. will be done with this class.
  * The requests will be delegated to it's children.
  * The object hierarchy will created by adding new objects via addComponent().
  *
  * @author Thomas Kabelmann
  * @version 0.1
  */
 class SkyMapComposite : public QObject, public SkyComposite
 {
     Q_OBJECT
 
   public:
     /**
      * Constructor
      * @p parent pointer to the parent SkyComponent
      */
     explicit SkyMapComposite(SkyComposite *parent = nullptr);
 
     ~SkyMapComposite() override;
 
-    void update(KSNumbers *num = 0) override;
+    void update(KSNumbers *num = nullptr) override;
 
     /**
      * @short Delegate planet position updates to the SolarSystemComposite
      *
      * Planet positions change over time, so they need to be recomputed
      * periodically, but not on every call to update().  This function
      * will recompute the positions of all solar system bodies except the
      * Earth's Moon, Jupiter's Moons AND Saturn Moons (because these objects' positions
      * change on a much more rapid timescale).
      * @p num Pointer to the KSNumbers object
      * @sa update()
      * @sa updateMoons()
      * @sa SolarSystemComposite::updatePlanets()
      */
     void updateSolarSystemBodies(KSNumbers *num) override;
 
     /**
      * @short Delegate moon position updates to the SolarSystemComposite
      *
      * Planet positions change over time, so they need to be recomputed
      * periodically, but not on every call to update().  This function
      * will recompute the positions of the Earth's Moon and Jupiter's four
      * Galilean moons.  These objects are done separately from the other
      * solar system bodies, because their positions change more rapidly,
      * and so updateMoons() must be called more often than updatePlanets().
      * @p num Pointer to the KSNumbers object
      * @sa update()
      * @sa updatePlanets()
      * @sa SolarSystemComposite::updateMoons()
      */
     //    virtual void updateMoons( KSNumbers *num );
 
     /**
      * @short Delegate draw requests to all sub components
      * @p psky Reference to the QPainter on which to paint
      */
     void draw(SkyPainter *skyp) override;
 
     /**
      * @return the object nearest a given point in the sky.
      * @param p The point to find an object near
      * @param maxrad The maximum search radius, in Degrees
      * @note the angular separation to the matched object is returned
      * through the maxrad variable.
      */
     SkyObject *objectNearest(SkyPoint *p, double &maxrad) override;
 
     /**
      * @return the star nearest a given point in the sky.
      * @param p The point to find a star near
      * @param maxrad The maximum search radius, in Degrees
      * @note the angular separation to the matched star is returned
      * through the maxrad variable.
      */
     SkyObject *starNearest(SkyPoint *p, double &maxrad);
 
     /**
      * @short Search the children of this SkyMapComposite for
      * a SkyObject whose name matches the argument.
      *
      * The objects' primary, secondary and long-form names will
      * all be checked for a match.
      * @note Overloaded from SkyComposite.  In this version, we search
      * the most likely object classes first to be more efficient.
      * @p name the name to be matched
      * @return a pointer to the SkyObject whose name matches
      * the argument, or a nullptr pointer if no match was found.
      */
     SkyObject *findByName(const QString &name) override;
 
     /**
      * @return the list of objects in the region defined by skypoints
      * @param p1 first sky point (top-left vertex of rectangular region)
      * @param p2 second sky point (bottom-right vertex of rectangular region)
      */
     QList<SkyObject *> findObjectsInArea(const SkyPoint &p1, const SkyPoint &p2);
 
     void addCustomCatalog(const QString &filename, int index);
     void removeCustomCatalog(const QString &name);
 
     bool addNameLabel(SkyObject *o);
     bool removeNameLabel(SkyObject *o);
 
     void reloadDeepSky();
     void reloadAsteroids();
     void reloadComets();
     void reloadCLines();
     void reloadCNames();
     void reloadConstellationArt();
 #ifndef KSTARS_LITE
     FlagComponent *flags();
 #endif
     SatellitesComponent *satellites();
     SupernovaeComponent *supernovaeComponent();
     ArtificialHorizonComponent *artificialHorizon();
 
     /** Getters for SkyComponents **/
     inline HorizonComponent *horizon() { return m_Horizon; }
 
     inline ConstellationBoundaryLines *constellationBoundary() { return m_CBoundLines; }
     inline ConstellationLines *constellationLines() { return m_CLines; }
 
     inline Ecliptic *ecliptic() { return m_Ecliptic; }
     inline Equator *equator() { return m_Equator; }
 
     inline EquatorialCoordinateGrid *equatorialCoordGrid() { return m_EquatorialCoordinateGrid; }
     inline HorizontalCoordinateGrid *horizontalCoordGrid() { return m_HorizontalCoordinateGrid; }
 
     inline ConstellationArtComponent *constellationArt() { return m_ConstellationArt; }
 
     inline SolarSystemComposite *solarSystemComposite() { return m_SolarSystem; }
 
     inline ConstellationNamesComponent *constellationNamesComponent() { return m_CNames; }
 
     inline DeepSkyComponent *deepSkyComponent() { return m_DeepSky; }
 
     inline MilkyWay *milkyWay() { return m_MilkyWay; }
 
     inline SyncedCatalogComponent *internetResolvedComponent() { return m_internetResolvedComponent; }
     inline SyncedCatalogComponent *manualAdditionsComponent() { return m_manualAdditionsComponent; }
 
     //Accessors for StarComponent
     SkyObject *findStarByGenetiveName(const QString name);
     void emitProgressText(const QString &message) override;
     QList<SkyObject *> &labelObjects() { return m_LabeledObjects; }
 
     const QList<DeepSkyObject *> &deepSkyObjects() const;
     const QList<SkyObject *> &constellationNames() const;
     const QList<SkyObject *> &stars() const;
     const QList<SkyObject *> &asteroids() const;
     const QList<SkyObject *> &comets() const;
     const QList<SkyObject *> &supernovae() const;
     QList<SkyObject *> planets();
     //    QList<SkyObject*> moons();
 
     const QList<SkyObject *> *getSkyObjectsList(SkyObject::TYPE t);
 
     KSPlanet *earth();
     KSPlanetBase *planet(int n);
     QStringList getCultureNames();
     QString getCultureName(int index);
     QString currentCulture();
     void setCurrentCulture(QString culture);
     bool isLocalCNames();
 
     QList<SkyComponent *> customCatalogs();
 
     inline TargetListComponent *getStarHopRouteList() { return m_StarHopRouteList; }
   signals:
     void progressText(const QString &message);
 
   private:
     QHash<int, QStringList> &getObjectNames() override;
     QHash<int, QVector<QPair<QString, const SkyObject *>>> &getObjectLists() override;
 
     std::unique_ptr<CultureList> m_Cultures;
     ConstellationBoundaryLines *m_CBoundLines { nullptr };
     ConstellationNamesComponent *m_CNames { nullptr };
     ConstellationLines *m_CLines { nullptr };
     ConstellationArtComponent *m_ConstellationArt { nullptr };
     EquatorialCoordinateGrid *m_EquatorialCoordinateGrid { nullptr };
     HorizontalCoordinateGrid *m_HorizontalCoordinateGrid { nullptr };
     DeepSkyComponent *m_DeepSky { nullptr };
     Equator *m_Equator { nullptr };
     ArtificialHorizonComponent *m_ArtificialHorizon { nullptr };
     Ecliptic *m_Ecliptic { nullptr };
     HorizonComponent *m_Horizon { nullptr };
     MilkyWay *m_MilkyWay { nullptr };
     SolarSystemComposite *m_SolarSystem { nullptr };
     std::unique_ptr<SkyComposite> m_CustomCatalogs;
     StarComponent *m_Stars { nullptr };
 #ifndef KSTARS_LITE
     FlagComponent *m_Flags { nullptr };
     HIPSComponent *m_HiPS { nullptr };
 #endif
     TargetListComponent *m_ObservingList { nullptr };
     TargetListComponent *m_StarHopRouteList { nullptr };
     SatellitesComponent *m_Satellites { nullptr };
     SupernovaeComponent *m_Supernovae { nullptr };
     SyncedCatalogComponent *m_internetResolvedComponent { nullptr };
     SyncedCatalogComponent *m_manualAdditionsComponent { nullptr };
 
     std::unique_ptr<SkyMesh> m_skyMesh;
     std::unique_ptr<SkyLabeler> m_skyLabeler;
 
     KSNumbers m_reindexNum;
 
     QList<DeepStarComponent *> m_DeepStars;
 
     QList<SkyObject *> m_LabeledObjects;
     QHash<int, QStringList> m_ObjectNames;
     QHash<int, QVector<QPair<QString, const SkyObject *>>> m_ObjectLists;
     QHash<QString, QString> m_ConstellationNames;
     QString m_internetResolvedCat; // Holds the name of the internet resolved catalog
     QString m_manualAdditionsCat;
 };
diff --git a/kstars/skycomponents/solarsystemcomposite.cpp b/kstars/skycomponents/solarsystemcomposite.cpp
index 25c3b7381..08563635f 100644
--- a/kstars/skycomponents/solarsystemcomposite.cpp
+++ b/kstars/skycomponents/solarsystemcomposite.cpp
@@ -1,197 +1,197 @@
 /***************************************************************************
                           solarsystemcomposite.h  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/01/09
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "solarsystemcomposite.h"
 
 #include "asteroidscomponent.h"
 #include "cometscomponent.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #endif
 #include "solarsystemsinglecomponent.h"
 #include "skyobjects/ksmoon.h"
 #include "skyobjects/ksplanet.h"
 #include "skyobjects/kssun.h"
 
 SolarSystemComposite::SolarSystemComposite(SkyComposite *parent) : SkyComposite(parent)
 {
     emitProgressText(i18n("Loading solar system"));
     m_Earth = new KSPlanet(I18N_NOOP("Earth"), QString(), QColor("white"), 12756.28 /*diameter in km*/);
 
     m_Sun                           = new KSSun();
     SolarSystemSingleComponent *sun = new SolarSystemSingleComponent(this, m_Sun, Options::showSun);
     addComponent(sun, 2);
     m_Moon                           = new KSMoon();
     SolarSystemSingleComponent *moon = new SolarSystemSingleComponent(this, m_Moon, Options::showMoon);
     addComponent(moon, 3);
     SolarSystemSingleComponent *mercury =
         new SolarSystemSingleComponent(this, new KSPlanet(KSPlanetBase::MERCURY), Options::showMercury);
     addComponent(mercury, 4);
     SolarSystemSingleComponent *venus =
         new SolarSystemSingleComponent(this, new KSPlanet(KSPlanetBase::VENUS), Options::showVenus);
     addComponent(venus, 4);
     SolarSystemSingleComponent *mars =
         new SolarSystemSingleComponent(this, new KSPlanet(KSPlanetBase::MARS), Options::showMars);
     addComponent(mars, 4);
     SolarSystemSingleComponent *jup =
         new SolarSystemSingleComponent(this, new KSPlanet(KSPlanetBase::JUPITER), Options::showJupiter);
     addComponent(jup, 4);
     /*
     m_JupiterMoons = new PlanetMoonsComponent( this, jup, KSPlanetBase::JUPITER);
     addComponent( m_JupiterMoons, 5 );
     */
     SolarSystemSingleComponent *sat =
         new SolarSystemSingleComponent(this, new KSPlanet(KSPlanetBase::SATURN), Options::showSaturn);
     addComponent(sat, 4);
     SolarSystemSingleComponent *uranus =
         new SolarSystemSingleComponent(this, new KSPlanet(KSPlanetBase::URANUS), Options::showUranus);
     addComponent(uranus, 4);
     SolarSystemSingleComponent *nep =
         new SolarSystemSingleComponent(this, new KSPlanet(KSPlanetBase::NEPTUNE), Options::showNeptune);
     addComponent(nep, 4);
     //addComponent( new SolarSystemSingleComponent( this, new KSPluto(), Options::showPluto ) );
 
     m_planets.append(sun);
     m_planets.append(moon);
     m_planets.append(mercury);
     m_planets.append(venus);
     m_planets.append(mars);
     m_planets.append(sat);
     m_planets.append(jup);
     m_planets.append(uranus);
     m_planets.append(nep);
 
     /*m_planetObjects.append(sun->planet());
     m_planetObjects.append(moon->planet());
     m_planetObjects.append(mercury->planet());
     m_planetObjects.append(venus->planet());
     m_planetObjects.append(mars->planet());
     m_planetObjects.append(sat->planet());
     m_planetObjects.append(jup->planet());
     m_planetObjects.append(uranus->planet());
     m_planetObjects.append(nep->planet());
 
     foreach(PlanetMoonsComponent *pMoons, planetMoonsComponent()) {
         PlanetMoons *moons = pMoons->getMoons();
         for(int i = 0; i < moons->nMoons(); ++i) {
             SkyObject *moon = moons->moon(i);
             objectLists(SkyObject::MOON).append(QPair<QString, const SkyObject*>(moon->name(), moon));
         }
     }*/
 
     addComponent(m_AsteroidsComponent = new AsteroidsComponent(this), 7);
     addComponent(m_CometsComponent = new CometsComponent(this), 7);
 }
 
 SolarSystemComposite::~SolarSystemComposite()
 {
     delete m_Earth;
 }
 
 bool SolarSystemComposite::selected()
 {
 #ifndef KSTARS_LITE
     return Options::showSolarSystem() && !(Options::hideOnSlew() && Options::hidePlanets() && SkyMap::IsSlewing());
 #else
     return Options::showSolarSystem() && !(Options::hideOnSlew() && Options::hidePlanets());
 #endif
 }
 
 void SolarSystemComposite::update(KSNumbers *num)
 {
     //    if ( ! selected() ) return;
 
     KStarsData *data = KStarsData::Instance();
     m_Sun->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     m_Moon->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     //    m_JupiterMoons->update( num );
 
     foreach (SkyComponent *comp, components())
     {
         comp->update(num);
     }
 }
 
 void SolarSystemComposite::updateSolarSystemBodies(KSNumbers *num)
 {
     m_Earth->findPosition(num);
     foreach (SkyComponent *comp, components())
     {
         comp->updateSolarSystemBodies(num);
     }
 }
 
 void SolarSystemComposite::updateMoons(KSNumbers *num)
 {
     //    if ( ! selected() ) return;
     KStarsData *data = KStarsData::Instance();
     m_Sun->findPosition(num);
     m_Moon->findPosition(num, data->geo()->lat(), data->lst());
-    m_Moon->findPhase(0);
+    m_Moon->findPhase(nullptr);
     //    m_JupiterMoons->updateMoons( num );
 }
 
 void SolarSystemComposite::drawTrails(SkyPainter *skyp)
 {
     if (selected())
         foreach (SkyComponent *comp, components())
             comp->drawTrails(skyp);
 }
 
 const QList<SkyObject *> &SolarSystemComposite::asteroids() const
 {
     return m_AsteroidsComponent->objectList();
 }
 
 const QList<SkyObject *> &SolarSystemComposite::comets() const
 {
     return m_CometsComponent->objectList();
 }
 
 const QList<SkyObject *> &SolarSystemComposite::planetObjects() const
 {
     return m_planetObjects;
 }
 
 const QList<SkyObject *> &SolarSystemComposite::moons() const
 {
     return m_moons;
 }
 
 CometsComponent *SolarSystemComposite::cometsComponent()
 {
     return m_CometsComponent;
 }
 
 AsteroidsComponent *SolarSystemComposite::asteroidsComponent()
 {
     return m_AsteroidsComponent;
 }
 
 const QList<SolarSystemSingleComponent *> &SolarSystemComposite::planets() const
 {
     return m_planets;
 }
 
 /*
 QList<PlanetMoonsComponent *> SolarSystemComposite::planetMoonsComponent() const
 {
     return QList <PlanetMoonsComponent *>({m_JupiterMoons});
 }
 */
diff --git a/kstars/skycomponents/solarsystemsinglecomponent.cpp b/kstars/skycomponents/solarsystemsinglecomponent.cpp
index 1e2a2e3a1..fbdc8c4fb 100644
--- a/kstars/skycomponents/solarsystemsinglecomponent.cpp
+++ b/kstars/skycomponents/solarsystemsinglecomponent.cpp
@@ -1,124 +1,124 @@
 /***************************************************************************
                           solarsystemsinglecomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/30/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "solarsystemsinglecomponent.h"
 #include "solarsystemcomposite.h"
 #include "skycomponent.h"
 
 #include "dms.h"
 #include "kstarsdata.h"
 #include "skyobjects/starobject.h"
 #include "skyobjects/ksplanetbase.h"
 #include "skyobjects/ksplanet.h"
 #ifdef KSTARS_LITE
 #include "skymaplite.h"
 #else
 #include "skymap.h"
 #endif
 
 #include "Options.h"
 #include "skylabeler.h"
 
 #include "skypainter.h"
 #include "projections/projector.h"
 
 SolarSystemSingleComponent::SolarSystemSingleComponent(SolarSystemComposite *parent, KSPlanetBase *kspb,
                                                        bool (*visibleMethod)())
     : SkyComponent(parent), visible(visibleMethod), m_Earth(parent->earth()), m_Planet(kspb)
 {
     m_Planet->loadData();
     if (!m_Planet->name().isEmpty())
     {
         objectNames(m_Planet->type()).append(m_Planet->name());
         objectLists(m_Planet->type()).append(QPair<QString, const SkyObject *>(m_Planet->name(), m_Planet));
     }
     if (!m_Planet->longname().isEmpty() && m_Planet->longname() != m_Planet->name())
     {
         objectNames(m_Planet->type()).append(m_Planet->longname());
         objectLists(m_Planet->type()).append(QPair<QString, const SkyObject *>(m_Planet->longname(), m_Planet));
     }
 }
 
 SolarSystemSingleComponent::~SolarSystemSingleComponent()
 {
     removeFromNames(m_Planet);
     removeFromLists(m_Planet);
     delete m_Planet;
 }
 
 bool SolarSystemSingleComponent::selected()
 {
     return visible();
 }
 
 SkyObject *SolarSystemSingleComponent::findByName(const QString &name)
 {
     if (QString::compare(m_Planet->name(), name, Qt::CaseInsensitive) == 0 ||
         QString::compare(m_Planet->longname(), name, Qt::CaseInsensitive) == 0 ||
         QString::compare(m_Planet->name2(), name, Qt::CaseInsensitive) == 0)
         return m_Planet;
-    return 0;
+    return nullptr;
 }
 
 SkyObject *SolarSystemSingleComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
     double r = m_Planet->angularDistanceTo(p).Degrees();
     if (r < maxrad)
     {
         maxrad = r;
         return m_Planet;
     }
-    return 0;
+    return nullptr;
 }
 
 void SolarSystemSingleComponent::update(KSNumbers *)
 {
     KStarsData *data = KStarsData::Instance();
     if (selected())
         m_Planet->EquatorialToHorizontal(data->lst(), data->geo()->lat());
 }
 
 void SolarSystemSingleComponent::updateSolarSystemBodies(KSNumbers *num)
 {
     if (selected())
     {
         KStarsData *data = KStarsData::Instance();
         m_Planet->findPosition(num, data->geo()->lat(), data->lst(), m_Earth);
         m_Planet->EquatorialToHorizontal(data->lst(), data->geo()->lat());
         if (m_Planet->hasTrail())
             m_Planet->updateTrail(data->lst(), data->geo()->lat());
     }
 }
 
 void SolarSystemSingleComponent::draw(SkyPainter *skyp)
 {
     if (!selected())
         return;
 
     skyp->setPen(m_Planet->color());
     skyp->setBrush(m_Planet->color());
 
     bool drawn = skyp->drawPlanet(m_Planet);
     if (drawn && Options::showPlanetNames())
         SkyLabeler::AddLabel(m_Planet, SkyLabeler::PLANET_LABEL);
 }
 
 void SolarSystemSingleComponent::drawTrails(SkyPainter *skyp)
 {
     if (selected())
         m_Planet->drawTrail(skyp);
 }
diff --git a/kstars/skycomponents/starblock.cpp b/kstars/skycomponents/starblock.cpp
index 88a89d7c0..5e82ffba4 100644
--- a/kstars/skycomponents/starblock.cpp
+++ b/kstars/skycomponents/starblock.cpp
@@ -1,127 +1,127 @@
 /***************************************************************************
                    starblock.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 9 Jun 2008
     copyright            : (C) 2008 by Akarsh Simha
     email                : akarshsimha@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include <QDebug>
 
 #include "starblock.h"
 #include "skyobjects/starobject.h"
 #include "starcomponent.h"
 #include "skyobjects/stardata.h"
 #include "skyobjects/deepstardata.h"
 
 #ifdef KSTARS_LITE
 #include "skymaplite.h"
 #include "kstarslite/skyitems/skynodes/pointsourcenode.h"
 
 StarNode::StarNode() : starNode(0)
 {
 }
 
 StarNode::~StarNode()
 {
     if (starNode)
     {
         SkyMapLite::Instance()->deleteSkyNode(starNode);
         qDebug() << "REAL NODE DESTRUCTOR";
     }
 }
 #endif
 
 StarBlock::StarBlock(int nstars)
-    : faintMag(-5), brightMag(35), parent(0), prev(0), next(0), drawID(0), nStars(0),
+    : faintMag(-5), brightMag(35), parent(nullptr), prev(nullptr), next(nullptr), drawID(0), nStars(0),
 #ifdef KSTARS_LITE
       stars(nstars, StarNode())
 #else
       stars(nstars, StarObject())
 #endif
 {
 }
 
 void StarBlock::reset()
 {
     if (parent)
         parent->releaseBlock(this);
 
     parent    = nullptr;
     faintMag  = -5.0;
     brightMag = 35.0;
     nStars    = 0;
 }
 
 StarBlock::~StarBlock()
 {
 }
 
 #ifdef KSTARS_LITE
 StarNode *StarBlock::addStar(const StarData &data)
 {
     if (isFull())
         return 0;
     StarNode &node   = stars[nStars++];
     StarObject &star = node.star;
 
     star.init(&data);
     if (star.mag() > faintMag)
         faintMag = star.mag();
     if (star.mag() < brightMag)
         brightMag = star.mag();
     return &node;
 }
 
 StarNode *StarBlock::addStar(const DeepStarData &data)
 {
     if (isFull())
         return 0;
     StarNode &node   = stars[nStars++];
     StarObject &star = node.star;
 
     star.init(&data);
     if (star.mag() > faintMag)
         faintMag = star.mag();
     if (star.mag() < brightMag)
         brightMag = star.mag();
     return &node;
 }
 #else
 StarObject *StarBlock::addStar(const StarData &data)
 {
     if (isFull())
-        return 0;
+        return nullptr;
     StarObject &star = stars[nStars++];
 
     star.init(&data);
     if (star.mag() > faintMag)
         faintMag = star.mag();
     if (star.mag() < brightMag)
         brightMag = star.mag();
     return &star;
 }
 
 StarObject *StarBlock::addStar(const DeepStarData &data)
 {
     if (isFull())
-        return 0;
+        return nullptr;
     StarObject &star = stars[nStars++];
 
     star.init(&data);
     if (star.mag() > faintMag)
         faintMag = star.mag();
     if (star.mag() < brightMag)
         brightMag = star.mag();
     return &star;
 }
 #endif
diff --git a/kstars/skycomponents/starblockfactory.cpp b/kstars/skycomponents/starblockfactory.cpp
index 6a8bbe016..aea5f777d 100644
--- a/kstars/skycomponents/starblockfactory.cpp
+++ b/kstars/skycomponents/starblockfactory.cpp
@@ -1,319 +1,319 @@
 /***************************************************************************
                starblockfactory.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 7 Jun 2008
     copyright            : (C) 2008 by Akarsh Simha
     email                : akarshsimha@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "starblockfactory.h"
 
 #include "starblock.h"
 #include "starobject.h"
 
 #include <kstars_debug.h>
 
 // TODO: Implement a better way of deciding this
 #define DEFAULT_NCACHE 12
 
-StarBlockFactory *StarBlockFactory::pInstance = 0;
+StarBlockFactory *StarBlockFactory::pInstance = nullptr;
 
 StarBlockFactory *StarBlockFactory::Instance()
 {
     if (!pInstance)
         pInstance = new StarBlockFactory();
     return pInstance;
 }
 
 StarBlockFactory::StarBlockFactory()
 {
     first   = nullptr;
     last    = nullptr;
     nBlocks = 0;
     drawID  = 0;
     nCache  = DEFAULT_NCACHE;
 }
 
 StarBlockFactory::~StarBlockFactory()
 {
     deleteBlocks(nBlocks);
     if (pInstance)
         pInstance = nullptr;
 }
 
 std::shared_ptr<StarBlock> StarBlockFactory::getBlock()
 {
     std::shared_ptr<StarBlock> freeBlock;
 
     if (nBlocks < nCache)
     {
         freeBlock.reset(new StarBlock);
         if (freeBlock.get())
         {
             ++nBlocks;
             return freeBlock;
         }
     }
     if (last && (last->drawID != drawID || last->drawID == 0))
     {
         //        qCDebug(KSTARS) << "Recycling block with drawID =" << last->drawID << "and current drawID =" << drawID;
         if (last->parent->block(last->parent->getBlockCount() - 1) != last)
             qCDebug(KSTARS) << "ERROR: Goof up here!";
         freeBlock = last;
         last      = last->prev;
         if (last)
         {
             last->next = nullptr;
         }
         if (freeBlock == first)
         {
             first = nullptr;
         }
         freeBlock->reset();
         freeBlock->prev = nullptr;
         freeBlock->next = nullptr;
         return freeBlock;
     }
     freeBlock.reset(new StarBlock);
     if (freeBlock.get())
         ++nBlocks;
 
     return freeBlock;
 }
 
 bool StarBlockFactory::markFirst(std::shared_ptr<StarBlock>& block)
 {
     if (!block.get())
         return false;
 
     //    fprintf(stderr, "markFirst()!\n");
     if (!first)
     {
         //        qCDebug(KSTARS) << "INFO: Linking in first block" << endl;
         last = first = block;
         first->prev = first->next = nullptr;
         first->drawID             = drawID;
         return true;
     }
 
     if (block == first) // Block is already in the front
     {
         block->drawID = drawID;
         return true;
     }
 
     if (block == last)
         last = block->prev;
 
     if (block->prev)
         block->prev->next = block->next;
 
     if (block->next)
         block->next->prev = block->prev;
 
     first->prev = block;
     block->next = first;
     block->prev = nullptr;
     first       = block;
 
     block->drawID = drawID;
 
     return true;
 }
 
 bool StarBlockFactory::markNext(std::shared_ptr<StarBlock>& after, std::shared_ptr<StarBlock>& block)
 {
     //    fprintf(stderr, "markNext()!\n");
     if (!block.get() || !after.get())
     {
         qCDebug(KSTARS) << "WARNING: markNext called with nullptr argument" << endl;
         return false;
     }
 
     if (!first.get())
     {
         qCDebug(KSTARS) << "WARNING: markNext called without an existing linked list" << endl;
         return false;
     }
 
     if (block == after)
     {
         qCDebug(KSTARS) << "ERROR: Trying to mark a block after itself!" << endl;
         return false;
     }
 
     if (block->prev == after) // Block is already after 'after'
     {
         block->drawID = drawID;
         return true;
     }
 
     if (block == first)
     {
         if (block->next == nullptr)
         {
             qCDebug(KSTARS) << "ERROR: Trying to mark only block after some other block";
             return false;
         }
         first = block->next;
     }
 
     if (after->getFaintMag() > block->getFaintMag() && block->getFaintMag() != -5)
     {
         qCDebug(KSTARS) << "WARNING: Marking block with faint mag = " << block->getFaintMag() << " after block with faint mag "
                  << after->getFaintMag() << "in trixel" << block->parent->getTrixel();
     }
 
     if (block == last)
         last = block->prev;
 
     if (block->prev)
         block->prev->next = block->next;
     if (block->next)
         block->next->prev = block->prev;
 
     block->next = after->next;
     if (block->next)
         block->next->prev = block;
     block->prev = after;
     after->next = block;
 
     if (after == last)
         last = block;
 
     block->drawID = drawID;
 
     return true;
 }
 
 /*
 bool StarBlockFactory::groupMove( StarBlock *start, const int nblocks ) {
 
     StarBlock * end = nullptr;
 
     // Check for trivial cases
     if( !start || nblocks < 0 )
         return false;
 
     if( nblocks == 0 )
         return true;
 
     if( !first )
         return false;
 
     // Check for premature end
     end = start;
     for( int i = 1; i < nblocks; ++i ) {
         if( end == nullptr )
             return false;
         end = end->next;
     }
     if( end == nullptr )
         return false;
 
     // Update drawIDs
     end = start;
     for( int i = 1; i < nblocks; ++i ) {
         end->drawID = drawID;
         end = end->next;
     }
     end->drawID = drawID;
 
     // Check if we are already in the front
     if( !start->prev )
         return true;
 
     start->prev->next = end->next;
     end->next->prev = start->prev;
 
     first->prev = end;
     end->next = first;
     start->prev = nullptr;
     first = start;
 }
 */
 
 int StarBlockFactory::deleteBlocks(int nblocks)
 {
     int i           = 0;
     std::shared_ptr<StarBlock> temp;
 
     while (last != nullptr && i != nblocks)
     {
         temp = last->prev;
         last.reset();
         last = temp;
         i++;
     }
     if (last)
         last->next = nullptr;
     else
         first = nullptr;
 
     qCDebug(KSTARS) << nblocks << "StarBlocks freed from StarBlockFactory";
 
     nBlocks -= i;
     return i;
 }
 
 void StarBlockFactory::printStructure() const
 {
     std::shared_ptr<StarBlock> cur;
     Trixel curTrixel = 513; // TODO: Change if we change HTMesh level
     int index        = 0;
     bool draw        = false;
 
     cur = first;
     do
     {
         if (curTrixel != cur->parent->getTrixel())
         {
             qCDebug(KSTARS) << "Trixel" << cur->parent->getTrixel() << "starts at index" << index << endl;
             curTrixel = cur->parent->getTrixel();
         }
         if (cur->drawID == drawID && !draw)
         {
             qCDebug(KSTARS) << "Blocks from index" << index << "are drawn";
             draw = true;
         }
         if (cur->drawID != drawID && draw)
         {
             qCDebug(KSTARS) << "Blocks from index" << index << "are not drawn";
             draw = false;
         }
         cur = cur->next;
         ++index;
     } while (cur != last);
 }
 
 int StarBlockFactory::freeUnused()
 {
     int i           = 0;
     std::shared_ptr<StarBlock> temp;
 
     while (last != nullptr && last->drawID < drawID && i != nBlocks)
     {
         temp = last->prev;
         last.reset();
         last = temp;
         i++;
     }
     if (last)
         last->next = nullptr;
     else
         first = nullptr;
 
     qCDebug(KSTARS) << i << "StarBlocks freed from StarBlockFactory";
 
     nBlocks -= i;
     return i;
 }
diff --git a/kstars/skycomponents/starcomponent.cpp b/kstars/skycomponents/starcomponent.cpp
index 55639e5d5..f5673c4e3 100644
--- a/kstars/skycomponents/starcomponent.cpp
+++ b/kstars/skycomponents/starcomponent.cpp
@@ -1,844 +1,844 @@
 /***************************************************************************
                           starcomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2005/14/08
     copyright            : (C) 2005 by Thomas Kabelmann
     email                : thomas.kabelmann@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "starcomponent.h"
 
 #include "binfilehelper.h"
 #include "deepstarcomponent.h"
 #include "highpmstarlist.h"
 #ifndef KSTARS_LITE
 #include "kstars.h"
 #endif
 #include "kstarsdata.h"
 #include "kstarssplash.h"
 #include "Options.h"
 #include "skylabeler.h"
 #include "skymap.h"
 #include "skymesh.h"
 #ifndef KSTARS_LITE
 #include "skyqpainter.h"
 #endif
 #include "htmesh/MeshIterator.h"
 #include "projections/projector.h"
 
 #include <qplatformdefs.h>
 
 #ifdef _WIN32
 #include <windows.h>
 #endif
 
 #if defined(Q_OS_FREEBSD) || defined(Q_OS_NETBSD)
 #include <sys/endian.h>
 #define bswap_16(x) bswap16(x)
 #define bswap_32(x) bswap32(x)
 #else
 #include "byteorder.h"
 #endif
 
-StarComponent *StarComponent::pinstance = 0;
+StarComponent *StarComponent::pinstance = nullptr;
 
 StarComponent::StarComponent(SkyComposite *parent)
     : ListComponent(parent), m_reindexNum(J2000)
 {
     m_skyMesh          = SkyMesh::Instance();
     m_StarBlockFactory = StarBlockFactory::Instance();
 
     m_starIndex.reset(new StarIndex());
     for (int i = 0; i < m_skyMesh->size(); i++)
         m_starIndex->append(new StarList());
     m_highPMStars.append(new HighPMStarList(840.0));
     m_highPMStars.append(new HighPMStarList(304.0));
     m_reindexInterval = StarObject::reindexInterval(304.0);
 
     for (int i = 0; i <= MAX_LINENUMBER_MAG; i++)
         m_labelList[i] = new LabelList;
 
     // Actually load data
     emitProgressText(i18n("Loading stars"));
 
     loadStaticData();
     // Load any deep star catalogs that are available
     loadDeepStarCatalogs();
 
 // The following works but can cause crashes sometimes
 //QtConcurrent::run(this, &StarComponent::loadDeepStarCatalogs);
 
 //In KStars Lite star images are initialized in SkyMapLite
 #ifndef KSTARS_LITE
     SkyQPainter::initStarImages();
 #endif
 }
 
 StarComponent::~StarComponent()
 {
     qDeleteAll(*m_starIndex);
     m_starIndex->clear();
     qDeleteAll(m_DeepStarComponents);
     m_DeepStarComponents.clear();
     qDeleteAll(m_highPMStars);
     m_highPMStars.clear();
     for (int i = 0; i <= MAX_LINENUMBER_MAG; i++)
         delete m_labelList[i];
 }
 
 StarComponent *StarComponent::Create(SkyComposite *parent)
 {
     delete pinstance;
     pinstance = new StarComponent(parent);
     return pinstance;
 }
 
 bool StarComponent::selected()
 {
     return Options::showStars();
 }
 
 bool StarComponent::addDeepStarCatalogIfExists(const QString &fileName, float trigMag, bool staticstars)
 {
     if (BinFileHelper::testFileExists(fileName))
     {
         m_DeepStarComponents.append(new DeepStarComponent(parent(), fileName, trigMag, staticstars));
         return true;
     }
     return false;
 }
 
 int StarComponent::loadDeepStarCatalogs()
 {
     // Look for the basic unnamed star catalog to mag 8.0
     if (!addDeepStarCatalogIfExists("unnamedstars.dat", -5.0, true))
         return 0;
 
     // Look for the Tycho-2 add-on with 2.5 million stars to mag 12.5
     if (!addDeepStarCatalogIfExists("tycho2.dat", 8.0) && !addDeepStarCatalogIfExists("deepstars.dat", 8.0))
         return 1;
 
     // Look for the USNO NOMAD 1e8 star catalog add-on with stars to mag 16
     if (!addDeepStarCatalogIfExists("USNO-NOMAD-1e8.dat", 11.0))
         return 2;
 
     return 3;
 }
 
 //This function is empty for a reason; we override the normal
 //update function in favor of JiT updates for stars.
 void StarComponent::update(KSNumbers *)
 {
 }
 
 // We use the update hook to re-index all the stars when the date has changed by
 // more than 150 years.
 
 bool StarComponent::reindex(KSNumbers *num)
 {
     if (!num)
         return false;
 
     // for large time steps we re-index all points
     if (fabs(num->julianCenturies() - m_reindexNum.julianCenturies()) > m_reindexInterval)
     {
         reindexAll(num);
         return true;
     }
 
     bool highPM = true;
     // otherwise we just re-index fast movers as needed
     for (int j = 0; j < m_highPMStars.size(); j++)
         highPM &= !(m_highPMStars.at(j)->reindex(num, m_starIndex.get()));
     return !(highPM);
 }
 
 void StarComponent::reindexAll(KSNumbers *num)
 {
     if (0 && !m_reindexSplash)
     {
         m_reindexSplash = new KStarsSplash(i18n("Please wait while re-indexing stars..."));
         QObject::connect(KStarsData::Instance(), SIGNAL(progressText(QString)), m_reindexSplash,
                          SLOT(setMessage(QString)));
 
         m_reindexSplash->show();
         m_reindexSplash->raise();
         return;
     }
 
     printf("Re-indexing Stars to year %4.1f...\n", 2000.0 + num->julianCenturies() * 100.0);
 
     m_reindexNum = KSNumbers(*num);
     m_skyMesh->setKSNumbers(num);
 
     // clear out the old index
     for (int i = 0; i < m_starIndex->size(); i++)
     {
         m_starIndex->at(i)->clear();
     }
 
     // re-populate it from the objectList
     int size = m_ObjectList.size();
     for (int i = 0; i < size; i++)
     {
         StarObject *star = (StarObject *)m_ObjectList[i];
         Trixel trixel    = m_skyMesh->indexStar(star);
         m_starIndex->at(trixel)->append(star);
     }
 
     // Let everyone else know we have re-indexed to num
     for (int j = 0; j < m_highPMStars.size(); j++)
     {
         m_highPMStars.at(j)->setIndexTime(num);
     }
 
     //delete m_reindexSplash;
     //m_reindexSplash = 0;
 
     printf("Done.\n");
 }
 
 float StarComponent::faintMagnitude() const
 {
     float faintmag = m_FaintMagnitude;
     for (int i = 0; i < m_DeepStarComponents.size(); ++i)
     {
         if (faintmag < m_DeepStarComponents.at(i)->faintMagnitude())
             faintmag = m_DeepStarComponents.at(i)->faintMagnitude();
     }
     return faintmag;
 }
 
 float StarComponent::zoomMagnitudeLimit()
 {
     //adjust maglimit for ZoomLevel
     double lgmin = log10(MINZOOM);
     double lgz   = log10(Options::zoomFactor());
 
     // Old formula:
     //    float maglim = ( 2.000 + 2.444 * Options::memUsage() / 10.0 ) * ( lgz - lgmin ) + Options::magLimitDrawStarZoomOut();
 
     /*
      Explanation for the following formula:
      --------------------------------------
      Estimates from a sample of 125000 stars shows that, magnitude
      limit vs. number of stars follows the formula:
        nStars = 10^(.45 * maglim + .95)
      (A better formula is available here: http://www.astro.uu.nl/~strous/AA/en/antwoorden/magnituden.html
       which we do not implement for simplicity)
      We want to keep the star density on screen a constant. This is directly proportional to the number of stars
      and directly proportional to the area on screen. The area is in turn inversely proportional to the square
      of the zoom factor ( zoomFactor / MINZOOM ). This means that (taking logarithms):
        0.45 * maglim + 0.95 - 2 * log( ZoomFactor ) - log( Star Density ) - log( Some proportionality constant )
      hence the formula. We've gathered together all the constants and set it to 3.5, so as to set the minimum
      possible value of maglim to 3.5
     */
 
     //    float maglim = 4.444 * ( lgz - lgmin ) + 2.222 * log10( Options::starDensity() ) + 3.5;
 
     // Reducing the slope w.r.t zoom factor to avoid the extremely fast increase in star density with zoom
     // that 4.444 gives us (although that is what the derivation gives us)
 
     return 3.5 + 3.7 * (lgz - lgmin) + 2.222 * log10(static_cast<float>(Options::starDensity()));
 }
 
 void StarComponent::draw(SkyPainter *skyp)
 {
 #ifndef KSTARS_LITE
     if (!selected())
         return;
 
     SkyMap *map           = SkyMap::Instance();
     const Projector *proj = map->projector();
     KStarsData *data      = KStarsData::Instance();
     UpdateID updateID     = data->updateID();
 
     bool checkSlewing = (map->isSlewing() && Options::hideOnSlew());
     m_hideLabels      = checkSlewing || !(Options::showStarMagnitudes() || Options::showStarNames());
 
     //shortcuts to inform whether to draw different objects
     bool hideFaintStars = checkSlewing && Options::hideStars();
     double hideStarsMag = Options::magLimitHideStar();
     reindex(data->updateNum());
 
     double lgmin = log10(MINZOOM);
     double lgmax = log10(MAXZOOM);
     double lgz   = log10(Options::zoomFactor());
 
     double maglim;
     m_zoomMagLimit = maglim = zoomMagnitudeLimit();
 
     double labelMagLim = Options::starLabelDensity() / 5.0;
     labelMagLim += (12.0 - labelMagLim) * (lgz - lgmin) / (lgmax - lgmin);
     if (labelMagLim > 8.0)
         labelMagLim = 8.0;
 
     //Calculate sizeMagLim
     // Old formula:
     //    float sizeMagLim = ( 2.000 + 2.444 * Options::memUsage() / 10.0 ) * ( lgz - lgmin ) + 5.8;
 
     // Using the maglim to compute the sizes of stars reduces
     // discernability between brighter and fainter stars at high zoom
     // levels. To fix that, we use an "arbitrary" constant in place of
     // the variable star density.
     // Not using this formula now.
     //    float sizeMagLim = 4.444 * ( lgz - lgmin ) + 5.0;
 
     float sizeMagLim = zoomMagnitudeLimit();
     if (sizeMagLim > faintMagnitude() * (1 - 1.5 / 16))
         sizeMagLim = faintMagnitude() * (1 - 1.5 / 16);
     skyp->setSizeMagLimit(sizeMagLim);
 
     //Loop for drawing star images
 
     MeshIterator region(m_skyMesh, DRAW_BUF);
     magLim = maglim;
 
     // If we are hiding faint stars, then maglim is really the brighter of hideStarsMag and maglim
     if (hideFaintStars && maglim > hideStarsMag)
         maglim = hideStarsMag;
 
     m_StarBlockFactory->drawID = m_skyMesh->drawID();
 
     int nTrixels = 0;
 
     while (region.hasNext())
     {
         ++nTrixels;
         Trixel currentRegion = region.next();
         StarList *starList   = m_starIndex->at(currentRegion);
 
         for (int i = 0; i < starList->size(); ++i)
         {
             StarObject *curStar = starList->at(i);
             if (!curStar)
                 continue;
 
             float mag = curStar->mag();
 
             // break loop if maglim is reached
             if (mag > maglim)
                 break;
 
             if (curStar->updateID != updateID)
                 curStar->JITupdate();
 
             bool drawn = skyp->drawPointSource(curStar, mag, curStar->spchar());
 
             //FIXME_SKYPAINTER: find a better way to do this.
             if (drawn && !(m_hideLabels || mag > labelMagLim))
                 addLabel(proj->toScreen(curStar), curStar);
         }
     }
 
     // Draw focusStar if not null
     if (focusStar)
     {
         if (focusStar->updateID != updateID)
             focusStar->JITupdate();
         float mag = focusStar->mag();
         skyp->drawPointSource(focusStar, mag, focusStar->spchar());
     }
 
     // Now draw each of our DeepStarComponents
     for (int i = 0; i < m_DeepStarComponents.size(); ++i)
     {
         m_DeepStarComponents.at(i)->draw(skyp);
     }
 #else
     Q_UNUSED(skyp)
 #endif
 }
 
 void StarComponent::addLabel(const QPointF &p, StarObject *star)
 {
     int idx = int(star->mag() * 10.0);
     if (idx < 0)
         idx = 0;
     if (idx > MAX_LINENUMBER_MAG)
         idx = MAX_LINENUMBER_MAG;
     m_labelList[idx]->append(SkyLabel(p, star));
 }
 
 void StarComponent::drawLabels()
 {
     if (m_hideLabels)
         return;
 
     SkyLabeler *labeler = SkyLabeler::Instance();
     labeler->setPen(QColor(KStarsData::Instance()->colorScheme()->colorNamed("SNameColor")));
 
     int max = int(m_zoomMagLimit * 10.0);
     if (max < 0)
         max = 0;
     if (max > MAX_LINENUMBER_MAG)
         max = MAX_LINENUMBER_MAG;
 
     for (int i = 0; i <= max; i++)
     {
         LabelList *list = m_labelList[i];
         for (int j = 0; j < list->size(); j++)
         {
             labeler->drawNameLabel(list->at(j).obj, list->at(j).o);
         }
         list->clear();
     }
 }
 
 bool StarComponent::loadStaticData()
 {
     // We break from Qt / KDE API and use traditional file handling here, to obtain speed.
     // We also avoid C++ constructors for the same reason.
     FILE *dataFile, *nameFile;
     bool swapBytes = false, named = false, gnamed = false;
     BinFileHelper dataReader, nameReader;
     QString name, gname, visibleName;
     StarObject *star;
 
     if (starsLoaded)
         return true;
 
     // prepare to index stars to this date
     m_skyMesh->setKSNumbers(&m_reindexNum);
 
     /* Open the data files */
     // TODO: Maybe we don't want to hardcode the filename?
     if ((dataFile = dataReader.openFile("namedstars.dat")) == nullptr)
     {
         qDebug() << "Could not open data file namedstars.dat" << endl;
         return false;
     }
 
     if (!(nameFile = nameReader.openFile("starnames.dat")))
     {
         qDebug() << "Could not open data file starnames.dat" << endl;
         return false;
     }
 
     if (!dataReader.readHeader())
     {
         qDebug() << "Error reading namedstars.dat header : " << dataReader.getErrorNumber() << " : "
                  << dataReader.getError() << endl;
         return false;
     }
 
     if (!nameReader.readHeader())
     {
         qDebug() << "Error reading starnames.dat header : " << nameReader.getErrorNumber() << " : "
                  << nameReader.getError() << endl;
         return false;
     }
     //KDE_fseek(nameFile, nameReader.getDataOffset(), SEEK_SET);
     QT_FSEEK(nameFile, nameReader.getDataOffset(), SEEK_SET);
     swapBytes = dataReader.getByteSwap();
 
     long int nstars = 0;
 
     //KDE_fseek(dataFile, dataReader.getDataOffset(), SEEK_SET);
     QT_FSEEK(dataFile, dataReader.getDataOffset(), SEEK_SET);
 
     qint16 faintmag;
     quint8 htm_level;
     quint16 t_MSpT;
     int ret = 0;
 
     ret = fread(&faintmag, 2, 1, dataFile);
     if (swapBytes)
         faintmag = bswap_16(faintmag);
     ret = fread(&htm_level, 1, 1, dataFile);
     ret = fread(&t_MSpT, 2, 1, dataFile); // Unused
     if (swapBytes)
         faintmag = bswap_16(faintmag);
 
     if (faintmag / 100.0 > m_FaintMagnitude)
         m_FaintMagnitude = faintmag / 100.0;
 
     if (htm_level != m_skyMesh->level())
         qDebug()
             << "WARNING: HTM Level in shallow star data file and HTM Level in m_skyMesh do not match. EXPECT TROUBLE"
             << endl;
 
     for (int i = 0; i < m_skyMesh->size(); ++i)
     {
         Trixel trixel = i; // = ( ( i >= 256 ) ? ( i - 256 ) : ( i + 256 ) );
         for (unsigned long j = 0; j < (unsigned long)dataReader.getRecordCount(i); ++j)
         {
             if (!fread(&stardata, sizeof(StarData), 1, dataFile))
             {
                 qDebug() << "FILE FORMAT ERROR: Could not read StarData structure for star #" << j << " under trixel #"
                          << trixel << endl;
             }
 
             /* Swap Bytes when required */
             if (swapBytes)
                 byteSwap(&stardata);
 
             named  = false;
             gnamed = false;
 
             /* Named Star - Read the nameFile */
             if (stardata.flags & 0x01)
             {
                 visibleName = "";
                 if (!fread(&starname, sizeof(starName), 1, nameFile))
                     qDebug() << "ERROR: fread() call on nameFile failed in trixel " << trixel << " star " << j << endl;
 
                 name  = QByteArray(starname.longName, 32);
                 named = !name.isEmpty();
 
                 gname  = QByteArray(starname.bayerName, 8);
                 gnamed = !gname.isEmpty();
 
                 if (gnamed && starname.bayerName[0] != '.')
                     visibleName = gname;
 
                 if (named)
                 {
                     // HEV: look up star name in internationalization filesource
                     name = i18nc("star name", name.toLocal8Bit().data());
                 }
                 else
                 {
                     name = i18n("star");
                 }
             }
             else
                 qDebug() << "ERROR: Named star file contains unnamed stars! Expect trouble." << endl;
 
             /* Create the new StarObject */
             star = new StarObject;
             star->init(&stardata);
             //if( star->getHDIndex() != 0 && name == i18n("star"))
             if (stardata.HD)
             {
                 m_HDHash.insert(stardata.HD, star);
                 if (named == false)
                 {
                     name  = QString("HD %1").arg(stardata.HD);
                     named = true;
                 }
             }
 
             star->setNames(name, visibleName);
             //star->EquatorialToHorizontal( data->lst(), data->geo()->lat() );
             ++nstars;
 
             if (gnamed)
                 m_genName.insert(gname, star);
 
             //if ( ! name.isEmpty() && name != i18n("star"))
             if (named)
             {
                 objectNames(SkyObject::STAR).append(name);
                 objectLists(SkyObject::STAR).append(QPair<QString, const SkyObject *>(name, star));
             }
 
             if (!visibleName.isEmpty() && gname != name)
             {
                 QString gName = star->gname(false);
                 objectNames(SkyObject::STAR).append(gName);
                 objectLists(SkyObject::STAR).append(QPair<QString, const SkyObject *>(gName, star));
             }
 
             m_ObjectList.append(star);
 
             m_starIndex->at(trixel)->append(star);
             double pm = star->pmMagnitude();
             for (int z = 0; z < m_highPMStars.size(); z++)
             {
                 HighPMStarList *list = m_highPMStars.at(z);
                 if (list->append(trixel, star, pm))
                     break;
             }
         }
     }
 
     dataReader.closeFile();
     nameReader.closeFile();
 
     starsLoaded = true;
     return true;
 }
 
 SkyObject *StarComponent::findStarByGenetiveName(const QString name)
 {
     if (name.startsWith(QLatin1String("HD")))
     {
         QStringList fields = name.split(' ', QString::SkipEmptyParts);
         bool Ok            = false;
         unsigned int HDNum = fields[1].toInt(&Ok);
         if (Ok)
             return findByHDIndex(HDNum);
     }
     return m_genName.value(name);
 }
 
 // Overrides ListComponent::findByName() to include genetive name and HD index also in the search
 SkyObject *StarComponent::findByName(const QString &name)
 {
 #ifndef KSTARS_LITE
     if (KStars::Closing)
         return nullptr;
 #endif
 
     foreach (SkyObject *o, m_ObjectList)
     {
 #ifndef KSTARS_LITE
         if (KStars::Closing)
             return nullptr;
 #endif
 
         if (QString::compare(o->name(), name, Qt::CaseInsensitive) == 0 ||
             QString::compare(o->longname(), name, Qt::CaseInsensitive) == 0 ||
             QString::compare(o->name2(), name, Qt::CaseInsensitive) == 0 ||
             QString::compare(((StarObject *)o)->gname(false), name, Qt::CaseInsensitive) == 0)
             return o;
     }
     return nullptr;
 }
 
 void StarComponent::objectsInArea(QList<SkyObject *> &list, const SkyRegion &region)
 {
     for (SkyRegion::const_iterator it = region.constBegin(); it != region.constEnd(); ++it)
     {
         Trixel trixel      = it.key();
         StarList *starlist = m_starIndex->at(trixel);
         for (int i = 0; starlist && i < starlist->size(); i++)
             if (starlist->at(i) && starlist->at(i)->name() != QString("star"))
                 list.push_back(starlist->at(i));
     }
 }
 
 StarObject *StarComponent::findByHDIndex(int HDnum)
 {
     KStarsData *data = KStarsData::Instance();
     StarObject *o = nullptr;
     BinFileHelper hdidxReader;
 
     // First check the hash to see if we have a corresponding StarObject already
     if ((o = m_HDHash.value(HDnum, nullptr)))
         return o;
     // If we don't have the StarObject here, try it in the DeepStarComponents' hashes
     if (m_DeepStarComponents.size() >= 1)
         if ((o = m_DeepStarComponents.at(0)->findByHDIndex(HDnum)))
             return o;
     if (m_DeepStarComponents.size() >= 2)
     {
         qint32 offset = 0;
         int ret = 0;
         FILE *hdidxFile = hdidxReader.openFile("Henry-Draper.idx");
         FILE *dataFile = nullptr;
 
         if (!hdidxFile)
-            return 0;
+            return nullptr;
         //KDE_fseek( hdidxFile, (HDnum - 1) * 4, SEEK_SET );
         QT_FSEEK(hdidxFile, (HDnum - 1) * 4, SEEK_SET);
         // TODO: Offsets need to be byteswapped if this is a big endian machine.
         // This means that the Henry Draper Index needs a endianness indicator.
         ret = fread(&offset, 4, 1, hdidxFile);
         if (offset <= 0)
-            return 0;
+            return nullptr;
         dataFile = m_DeepStarComponents.at(1)->getStarReader()->getFileHandle();
         //KDE_fseek( dataFile, offset, SEEK_SET );
         QT_FSEEK(dataFile, offset, SEEK_SET);
         ret = fread(&stardata, sizeof(StarData), 1, dataFile);
         if (m_DeepStarComponents.at(1)->getStarReader()->getByteSwap())
         {
             byteSwap(&stardata);
         }
         m_starObject.init(&stardata);
         m_starObject.EquatorialToHorizontal(data->lst(), data->geo()->lat());
         m_starObject.JITupdate();
         focusStar = m_starObject.clone();
         m_HDHash.insert(HDnum, focusStar);
         hdidxReader.closeFile();
         return focusStar;
     }
 
-    return 0;
+    return nullptr;
 }
 
 // This uses the main star index for looking up nearby stars but then
 // filters out objects with the generic name "star".  We could easily
 // build an index for just the named stars which would make this go
 // much faster still.  -jbb
 //
 SkyObject *StarComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
     m_zoomMagLimit = zoomMagnitudeLimit();
 
-    SkyObject *oBest = 0;
+    SkyObject *oBest = nullptr;
 
     MeshIterator region(m_skyMesh, OBJ_NEAREST_BUF);
 
     while (region.hasNext())
     {
         Trixel currentRegion = region.next();
         StarList *starList   = m_starIndex->at(currentRegion);
         for (int i = 0; i < starList->size(); ++i)
         {
             StarObject *star = starList->at(i);
             if (!star)
                 continue;
             if (star->mag() > m_zoomMagLimit)
                 continue;
 
             double r = star->angularDistanceTo(p).Degrees();
             if (r < maxrad)
             {
                 oBest  = star;
                 maxrad = r;
             }
         }
     }
 
     // Check up with our Deep Star Components too!
     double rTry, rBest;
     SkyObject *oTry;
     // JM 2016-03-30: Multiply rBest by a factor of 0.5 so that named stars are preferred to unnamed stars searched below
     rBest = maxrad * 0.5;
     rTry  = maxrad;
     for (int i = 0; i < m_DeepStarComponents.size(); ++i)
     {
         oTry = m_DeepStarComponents.at(i)->objectNearest(p, rTry);
         if (rTry < rBest)
         {
             rBest = rTry;
             oBest = oTry;
         }
     }
     maxrad = rBest;
 
     return oBest;
 }
 
 void StarComponent::starsInAperture(QList<StarObject *> &list, const SkyPoint &center, float radius, float maglim)
 {
     // Ensure that we have deprecessed the (RA, Dec) to (RA0, Dec0)
     Q_ASSERT(center.ra0().Degrees() >= 0.0);
     Q_ASSERT(center.dec0().Degrees() <= 90.0);
 
     m_skyMesh->intersect(center.ra0().Degrees(), center.dec0().Degrees(), radius, (BufNum)OBJ_NEAREST_BUF);
 
     MeshIterator region(m_skyMesh, OBJ_NEAREST_BUF);
 
     if (maglim < -28)
         maglim = m_FaintMagnitude;
 
     while (region.hasNext())
     {
         Trixel currentRegion = region.next();
         StarList *starList   = m_starIndex->at(currentRegion);
         for (int i = 0; i < starList->size(); ++i)
         {
             StarObject *star = starList->at(i);
             if (!star)
                 continue;
             if (star->mag() > m_FaintMagnitude)
                 continue;
             if (star->angularDistanceTo(&center).Degrees() <= radius)
                 list.append(star);
         }
     }
 
     // Add stars from the DeepStarComponents as well
     for (int i = 0; i < m_DeepStarComponents.size(); ++i)
     {
         m_DeepStarComponents.at(i)->starsInAperture(list, center, radius, maglim);
     }
 }
 
 void StarComponent::byteSwap(StarData *stardata)
 {
     stardata->RA       = bswap_32(stardata->RA);
     stardata->Dec      = bswap_32(stardata->Dec);
     stardata->dRA      = bswap_32(stardata->dRA);
     stardata->dDec     = bswap_32(stardata->dDec);
     stardata->parallax = bswap_32(stardata->parallax);
     stardata->HD       = bswap_32(stardata->HD);
     stardata->mag      = bswap_16(stardata->mag);
     stardata->bv_index = bswap_16(stardata->bv_index);
 }
 /*
 void StarComponent::printDebugInfo() {
 
     int nTrixels = 0;
     int nBlocks = 0;
     long int nStars = 0;
     float faintMag = -5.0;
 
     MeshIterator trixels( m_skyMesh, DRAW_BUF );
     Trixel trixel;
 
     while( trixels.hasNext() ) {
         trixel = trixels.next();
         nTrixels++;
         for(int i = 0; i < m_starBlockList[ trixel ]->getBlockCount(); ++i) {
             nBlocks++;
             StarBlock *block = m_starBlockList[ trixel ]->block( i );
             for(int j = 0; j < block->getStarCount(); ++j) {
                 nStars++;
             }
             if( block->getFaintMag() > faintMag ) {
                 faintMag = block->getFaintMag();
             }
         }
     }
 
     printf( "========== UNNAMED STAR MEMORY ALLOCATION INFORMATION ==========\n" );
     printf( "Number of visible trixels                    = %8d\n", nTrixels );
     printf( "Number of visible StarBlocks                 = %8d\n", nBlocks );
     printf( "Number of StarBlocks allocated via SBF       = %8d\n", m_StarBlockFactory.getBlockCount() );
     printf( "Number of unnamed stars in memory            = %8ld\n", nStars );
     printf( "Magnitude of the faintest star in memory     = %8.2f\n", faintMag );
     printf( "Target magnitude limit                       = %8.2f\n", magLim );
     printf( "Size of each StarBlock                       = %8d bytes\n", sizeof( StarBlock ) );
     printf( "Size of each StarObject                      = %8d bytes\n", sizeof( StarObject ) );
     printf( "Memory use due to visible unnamed stars      = %8.2f MB\n", ( sizeof( StarObject ) * nStars / 1048576.0 ) );
     printf( "Memory use due to visible StarBlocks         = %8d bytes\n", sizeof( StarBlock ) * nBlocks );
     printf( "Memory use due to StarBlocks in SBF          = %8d bytes\n", sizeof( StarBlock ) * m_StarBlockFactory.getBlockCount() );
     printf( "=============== STAR DRAW LOOP TIMING INFORMATION ==============\n" );
     printf( "Time taken for drawing named stars           = %8ld ms\n", t_drawNamed );
     printf( "Time taken for dynamic load of data          = %8ld ms\n", t_dynamicLoad );
     printf( "Time taken for updating LRU cache            = %8ld ms\n", t_updateCache );
     printf( "Time taken for drawing unnamed stars         = %8ld ms\n", t_drawUnnamed );
     printf( "================================================================\n" );
 }
 
 bool StarComponent::verifySBLIntegrity() {
 
     float faintMag = -5.0;
     bool integrity = true;
     for(Trixel trixel = 0; trixel < m_skyMesh->size(); ++trixel) {
         for(int i = 0; i < m_starBlockList[ trixel ]->getBlockCount(); ++i) {
             StarBlock *block = m_starBlockList[ trixel ]->block( i );
             if( i == 0 )
                 faintMag = block->getBrightMag();
             // NOTE: Assumes 2 decimal places in magnitude field. TODO: Change if it ever does change
             if( block->getBrightMag() != faintMag && ( block->getBrightMag() - faintMag ) > 0.016) {
                 qDebug() << "Trixel " << trixel << ": ERROR: faintMag of prev block = " << faintMag
                          << ", brightMag of block #" << i << " = " << block->getBrightMag();
                 integrity = false;
             }
             if( i > 1 && ( !block->prev ) )
                 qDebug() << "Trixel " << trixel << ": ERROR: Block" << i << "is unlinked in LRU Cache";
             if( block->prev && block->prev->parent == m_starBlockList[ trixel ]
                 && block->prev != m_starBlockList[ trixel ]->block( i - 1 ) ) {
                 qDebug() << "Trixel " << trixel << ": ERROR: SBF LRU Cache linked list seems to be broken at before block " << i << endl;
                 integrity = false;
             }
             faintMag = block->getFaintMag();
         }
     }
     return integrity;
 }
 */
diff --git a/kstars/skycomponents/supernovaecomponent.cpp b/kstars/skycomponents/supernovaecomponent.cpp
index 399121d69..662e9f55b 100644
--- a/kstars/skycomponents/supernovaecomponent.cpp
+++ b/kstars/skycomponents/supernovaecomponent.cpp
@@ -1,273 +1,273 @@
 /*  Supernova Component
     Copyright (C) 2016 Jasem Mutlaq <mutlaqja@ikarustech.com>
 
     Based on Samikshan Bairagya GSoC work.
 
     This application is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
  */
 
 #include "supernovaecomponent.h"
 
 #include <QtConcurrent>
 #include <QJsonDocument>
 #include <QJsonValue>
 
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #else
 #include "kstarslite.h"
 #endif
 #include "skypainter.h"
 #include "skymesh.h"
 #include "skylabeler.h"
 #include "projections/projector.h"
 #include "dms.h"
 #include "Options.h"
 #include "auxiliary/filedownloader.h"
 #include "ksnotification.h"
 //#include "notifyupdatesui.h"
 
 #ifndef KSTARS_LITE
 #include "kstars.h"
 #endif
 #include "kstarsdata.h"
 #include "auxiliary/kspaths.h"
 
 SupernovaeComponent::SupernovaeComponent(SkyComposite *parent) : ListComponent(parent)
 {
     QtConcurrent::run(this, &SupernovaeComponent::loadData);
     //loadData();
 }
 
 SupernovaeComponent::~SupernovaeComponent()
 {
 }
 
 void SupernovaeComponent::update(KSNumbers *num)
 {
     if (!selected())
         return;
 
     KStarsData *data = KStarsData::Instance();
     foreach (SkyObject *so, m_ObjectList)
     {
         if (num)
             so->updateCoords(num);
         so->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     }
 }
 
 bool SupernovaeComponent::selected()
 {
     return Options::showSupernovae();
 }
 
 void SupernovaeComponent::loadData()
 {
     qDeleteAll(m_ObjectList);
     m_ObjectList.clear();
 
     objectNames(SkyObject::SUPERNOVA).clear();
     objectLists(SkyObject::SUPERNOVA).clear();
 
     QString name, type, host, date, ra, de;
     float z, mag;
 
     QString sFileName = KSPaths::locate(QStandardPaths::GenericDataLocation, QString("catalog.min.json"));
 
     QFile sNovaFile(sFileName);
 
     if (sNovaFile.open(QIODevice::ReadOnly) == false)
     {
         qCritical() << "Unable to open supernova file" << sFileName;
         return;
     }
 
     QJsonParseError pError;
     QJsonDocument sNova = QJsonDocument::fromJson(sNovaFile.readAll(), &pError);
 
     if (pError.error != QJsonParseError::NoError)
     {
         qCritical() << "Error parsing json document" << pError.errorString();
         return;
     }
 
     if (sNova.isArray() == false)
     {
         qCritical() << "Invalid document format! No JSON array.";
         return;
     }
 
     QJsonArray sArray = sNova.array();
     bool ok           = false;
 
     foreach (const QJsonValue &snValue, sArray)
     {
         const QJsonObject propObject = snValue.toObject();
         mag                          = 99.9;
         z                            = 0;
         name.clear();
         type.clear();
         host.clear();
         date.clear();
 
         if (propObject.contains("ra") == false || propObject.contains("dec") == false)
             continue;
         ra = ((propObject["ra"].toArray()[0]).toObject()["value"]).toString();
         de = ((propObject["dec"].toArray()[0]).toObject()["value"]).toString();
 
         name = propObject["name"].toString();
         if (propObject.contains("claimedtype"))
             type = ((propObject["claimedtype"].toArray()[0]).toObject()["value"]).toString();
         if (propObject.contains("host"))
             host = ((propObject["host"].toArray()[0]).toObject()["value"]).toString();
         if (propObject.contains("discoverdate"))
             date = ((propObject["discoverdate"].toArray()[0]).toObject()["value"]).toString();
         if (propObject.contains("redshift"))
             z = ((propObject["redshift"].toArray()[0]).toObject()["value"]).toString().toDouble(&ok);
         if (ok == false)
             z = 99.9;
         if (propObject.contains("maxappmag"))
             mag = ((propObject["maxappmag"].toArray()[0]).toObject()["value"]).toString().toDouble(&ok);
         if (ok == false)
             mag = 99.9;
 
         Supernova *sup =
             new Supernova(name, dms::fromString(ra, false), dms::fromString(de, true), type, host, date, z, mag);
 
         objectNames(SkyObject::SUPERNOVA).append(name);
 
         m_ObjectList.append(sup);
         objectLists(SkyObject::SUPERNOVA).append(QPair<QString, const SkyObject *>(name, sup));
     }
 }
 
 SkyObject *SupernovaeComponent::findByName(const QString &name)
 {
     foreach (SkyObject *o, m_ObjectList)
     {
         if (QString::compare(o->name(), name, Qt::CaseInsensitive) == 0)
             return o;
     }
     //if no object is found then..
     return nullptr;
 }
 
 SkyObject *SupernovaeComponent::objectNearest(SkyPoint *p, double &maxrad)
 {
-    SkyObject *oBest = 0;
+    SkyObject *oBest = nullptr;
     double rBest     = maxrad;
 
     foreach (SkyObject *so, m_ObjectList)
     {
         double r = so->angularDistanceTo(p).Degrees();
         //qDebug()<<r;
         if (r < rBest)
         {
             oBest = so;
             rBest = r;
         }
     }
     maxrad = rBest;
     return oBest;
 }
 
 float SupernovaeComponent::zoomMagnitudeLimit()
 {
     //adjust maglimit for ZoomLevel
     double lgmin = log10(MINZOOM);
     double lgz   = log10(Options::zoomFactor());
 
     return 14.0 + 2.222 * (lgz - lgmin) + 2.222 * log10(static_cast<double>(Options::starDensity()));
 }
 
 void SupernovaeComponent::draw(SkyPainter *skyp)
 {
     //qDebug()<<"selected()="<<selected();
     if (!selected())
         return;
 
     double maglim = zoomMagnitudeLimit();
 
     foreach (SkyObject *so, m_ObjectList)
     {
         Supernova *sup = (Supernova *)so;
         float mag      = sup->mag();
 
         if (mag > float(Options::magnitudeLimitShowSupernovae()))
             continue;
 
         //Do not draw if mag>maglim
         if (mag > maglim)
             continue;
         skyp->drawSupernova(sup);
     }
 }
 
 #if 0
 void SupernovaeComponent::notifyNewSupernovae()
 {
 #ifndef KSTARS_LITE
     //qDebug()<<"New Supernovae discovered";
     QList<SkyObject *> latestList;
     foreach (SkyObject * so, latest)
     {
         Supernova * sup = (Supernova *)so;
 
         if (sup->getMagnitude() > float(Options::magnitudeLimitAlertSupernovae()))
         {
             //qDebug()<<"Not Bright enough to be notified";
             continue;
         }
 
         //qDebug()<<"Bright enough to be notified";
         latestList.append(so);
     }
     if (!latestList.empty())
     {
         NotifyUpdatesUI * ui = new NotifyUpdatesUI(0);
         ui->addItems(latestList);
         ui->show();
     }
 //     if (!latest.empty())
 //         KMessageBox::informationList(0, i18n("New Supernovae discovered!"), latestList, i18n("New Supernovae discovered!"));
 #endif
 }
 #endif
 
 void SupernovaeComponent::slotTriggerDataFileUpdate()
 {
     downloadJob = new FileDownloader();
 
     downloadJob->setProgressDialogEnabled(true, i18n("Supernovae Update"), i18n("Downloading Supernovae updates..."));
 
     QObject::connect(downloadJob, SIGNAL(downloaded()), this, SLOT(downloadReady()));
     QObject::connect(downloadJob, SIGNAL(error(QString)), this, SLOT(downloadError(QString)));
 
     QString output = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "catalog.min.json";
 
     downloadJob->setDownloadedFileURL(QUrl::fromLocalFile(output));
 
     downloadJob->get(QUrl("https://sne.space/astrocats/astrocats/supernovae/output/catalog.min.json"));
 }
 
 void SupernovaeComponent::downloadReady()
 {
     // Reload Supernova
     loadData();
 #ifdef KSTARS_LITE
     KStarsLite::Instance()->data()->setFullTimeUpdate();
 #else
     KStars::Instance()->data()->setFullTimeUpdate();
 #endif
     downloadJob->deleteLater();
 }
 
 void SupernovaeComponent::downloadError(const QString &errorString)
 {
     KSNotification::error(i18n("Error downloading asteroids data: %1", errorString));
     downloadJob->deleteLater();
 }
diff --git a/kstars/skycomponents/supernovaecomponent.h b/kstars/skycomponents/supernovaecomponent.h
index e76aefdee..7dbb45777 100644
--- a/kstars/skycomponents/supernovaecomponent.h
+++ b/kstars/skycomponents/supernovaecomponent.h
@@ -1,73 +1,73 @@
 /*  Supernova Component
     Copyright (C) 2016 Jasem Mutlaq <mutlaqja@ikarustech.com>
 
     Based on Samikshan Bairagya GSoC work.
 
     This application is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
  */
 
 #ifndef SUPERNOVAE_COMPONENT_H
 #define SUPERNOVAE_COMPONENT_H
 
 #include "listcomponent.h"
 #include "skyobjects/supernova.h"
 
 #include "ksnumbers.h"
 
 #include <QList>
 
 /**
  * @class SupernovaeComponent This class encapsulates Supernovae.
  *
  * @author Jasem Mutlaq, Samikshan Bairagya
  *
  * @version 0.2
  */
 
 class Supernova;
 class FileDownloader;
 
 class SupernovaeComponent : public QObject, public ListComponent
 {
     Q_OBJECT
 
   public:
     explicit SupernovaeComponent(SkyComposite *parent);
     ~SupernovaeComponent() override;
     bool selected() override;
-    void update(KSNumbers *num = 0) override;
+    void update(KSNumbers *num = nullptr) override;
     SkyObject *findByName(const QString &name) override;
     SkyObject *objectNearest(SkyPoint *p, double &maxrad) override;
 
     /**
          * @note This should actually be implemented in a better manner.
          * Possibly by checking if the host galaxy for the supernova is drawn.
          */
     void draw(SkyPainter *skyp) override;
 
     //virtual void notifyNewSupernovae();
     /**
          * @note Basically copy pasted from StarComponent::zoomMagnitudeLimit()
          */
     static float zoomMagnitudeLimit();
 
   public slots:
     /**
          * @short This initiates updating of the data file
          */
     void slotTriggerDataFileUpdate();
 
   protected slots:
     void downloadReady();
     void downloadError(const QString &errorString);
 
   private:
     void loadData();
 
     FileDownloader *downloadJob = nullptr;
 };
 
 #endif
diff --git a/kstars/skycomponents/syncedcatalogcomponent.cpp b/kstars/skycomponents/syncedcatalogcomponent.cpp
index 82004e0a5..a71b01628 100644
--- a/kstars/skycomponents/syncedcatalogcomponent.cpp
+++ b/kstars/skycomponents/syncedcatalogcomponent.cpp
@@ -1,115 +1,115 @@
 /***************************************************************************
             syncedcatalogcomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Tue 16 Aug 2016 04:19:00 CDT
     copyright            : (c) 2016 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 /* Project Includes */
 #include "syncedcatalogcomponent.h"
 #include "kstarsdata.h"
 #include "deepskyobject.h"
 #include "Options.h"
 #include "catalogdata.h"
 
 /* KDE Includes */
 
 /* Qt Includes */
 
 SyncedCatalogComponent::SyncedCatalogComponent(SkyComposite *parent, const QString &catname, bool showerrs, int index)
     : CatalogComponent(parent, catname, showerrs, index, false)
 {
     // First check if the catalog exists
     CatalogDB *db = KStarsData::Instance()->catalogdb();
     Q_ASSERT(db);
     m_catId = db->FindCatalog(catname);
     if (m_catId >= 0)
         loadData();
     else
     {
         // Create the catalog
         qWarning() << "Creating new catalog " << catname;
         CatalogData catData;
         catData.color =
             "#ff0000"; // FIXME: Allow users to change the color of these catalogs (eg: for resolved objects)
         catData.epoch        = 2000.0;
         catData.fluxfreq     = "400 nm";
         catData.fluxunit     = "mag";
         catData.author       = "KStars";
         catData.license      = "Unknown";
         catData.catalog_name = catname;
         catData.prefix       = catname;
         db->AddCatalog(catData);
         m_catId = db->FindCatalog(catname);
         loadData();
         Options::setShowCatalogNames(Options::showCatalogNames() << catname);
     }
     Q_ASSERT(m_catId >= 0);
     m_catColor = "#ff0000"; // FIXME: HARDCODED!
     m_catCount = m_ObjectList.count();
 }
 
 /*
 SyncedCatalogComponent::~SyncedCatalogComponent() {
 }
 */
 /*
 void SyncedCatalogComponent::draw( SkyPainter *skyp ) {
     qDebug() << "in SyncedCatalogComponent::draw()!";
     CatalogComponent::draw( skyp );
 }
 */
 
 DeepSkyObject *SyncedCatalogComponent::addObject(CatalogEntryData catalogEntry)
 {
     if (std::isnan(catalogEntry.major_axis))
         catalogEntry.major_axis = 0.0;
     if (std::isnan(catalogEntry.minor_axis))
         catalogEntry.minor_axis = 0.0;
     CatalogEntryData dbEntry = catalogEntry;
     if (dbEntry.catalog_name != m_catName)
     {
         qWarning() << "Trying to add object " << catalogEntry.catalog_name << catalogEntry.ID << " to catalog "
                    << m_catName << " will over-write catalog name with " << m_catName
                    << " in the database and assign an arbitrary ID";
         dbEntry.catalog_name = m_catName;
     }
     dbEntry.ID    = m_catCount;
     CatalogDB *db = KStarsData::Instance()->catalogdb();
     if (!(db->AddEntry(dbEntry, m_catId)))
-        return 0;
+        return nullptr;
     m_catCount++;
     qDebug() << "Added object " << catalogEntry.long_name << " into database!";
     DeepSkyObject *newObj = new DeepSkyObject(
         catalogEntry,
         this); // FIXME: What about stars? Are they treated as DeepSkyObjects, type CATALOG_STAR? -- asimha
     Q_ASSERT(newObj);
 
     qDebug() << "Created new DSO for " << catalogEntry.long_name;
     if (newObj->hasLongName())
     {
         //        newObj->setName( newObj->longname() );
         objectNames()[newObj->type()].append(newObj->longname());
         objectLists()[newObj->type()].append(QPair<QString, const SkyObject *>(newObj->longname(), newObj));
     }
     else
     {
         qWarning() << "Created object with name " << newObj->name() << " which is probably fake!";
         objectNames()[newObj->type()].append(newObj->name());
         objectLists()[newObj->type()].append(QPair<QString, const SkyObject *>(newObj->name(), newObj));
     }
     m_ObjectList.append(newObj);
     qDebug() << "Added new SkyObject " << newObj->name() << " to synced catalog " << m_catName << " which now contains "
              << m_ObjectList.count() << " objects.";
     return newObj;
 }
diff --git a/kstars/skycomponents/targetlistcomponent.cpp b/kstars/skycomponents/targetlistcomponent.cpp
index 11e5b3b31..b638672aa 100644
--- a/kstars/skycomponents/targetlistcomponent.cpp
+++ b/kstars/skycomponents/targetlistcomponent.cpp
@@ -1,56 +1,56 @@
 /***************************************************************************
               targetlistcomponent.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Oct 14 2010 9:59 PM CDT
     copyright            : (C) 2010 Akarsh Simha
     email                : akarsh.simha@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "targetlistcomponent.h"
 
 #ifndef KSTARS_LITE
 #include "skymap.h"
 #endif
 #include "skypainter.h"
 
 TargetListComponent::TargetListComponent(SkyComposite *parent) : SkyComponent(parent)
 {
-    drawSymbols = 0;
-    drawLabels  = 0;
+    drawSymbols = nullptr;
+    drawLabels  = nullptr;
 }
 
 TargetListComponent::TargetListComponent(SkyComposite *parent, SkyObjectList *objectList, QPen _pen,
                                          bool (*optionDrawSymbols)(void), bool (*optionDrawLabels)(void))
     : SkyComponent(parent), list(objectList), pen(_pen)
 {
     drawSymbols = optionDrawSymbols;
     drawLabels  = optionDrawLabels;
 }
 
 TargetListComponent::~TargetListComponent()
 {
     if (list.get())
     {
         qDeleteAll(*list);
     }
 }
 
 void TargetListComponent::draw(SkyPainter *skyp)
 {
     if (drawSymbols && !(*drawSymbols)())
         return;
     if (!list || list->count() <= 0)
         return;
 
     skyp->setPen(pen);
     skyp->drawObservingList(*list);
 }
diff --git a/kstars/skycomponents/targetlistcomponent.h b/kstars/skycomponents/targetlistcomponent.h
index 92d48db97..c432a84bc 100644
--- a/kstars/skycomponents/targetlistcomponent.h
+++ b/kstars/skycomponents/targetlistcomponent.h
@@ -1,88 +1,88 @@
 /***************************************************************************
                targetlistcomponent.h  -  K Desktop Planetarium
                              -------------------
     begin                : Oct 14 2010 9:59 PM CDT
     copyright            : (C) 2010 Akarsh Simha
     email                : akarsh.simha@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "skycomponent.h"
 
 #include <QPen>
 
 /**
  * @class TargetListComponent
  * @short Highlights objects present in certain lists by drawing "target" symbols around them.
  *
  * To represent lists of specific objects on the skymap (eg: A star
  * hopping route, or a list of planned observation targets), one would
  * typically like to draw over the skymap, a bunch of symbols
  * highlighting the locations of these objects. This class manages
  * drawing of such lists. Along with the list, we also associate a pen
  * to use to represent objects from that list. Once this class is made
  * aware of a list to plot (which is stored somewhere else), it does
  * so when called from the SkyMapComposite. The class may be supplied
  * with pointers to two methods that tell it whether to draw symbols /
  * labels or not. Disabling symbol drawing is equivalent to disabling
  * the list. If the pointers are nullptr, the symbols are always drawn,
  * but the labels are not drawn.
  *
  * @note This does not inherit from ListComponent because it is not
  * necessary. ListComponent has extra methods like objectNearest(),
  * which we don't want. Also, ListComponent maintains its own list,
  * whereas this class merely holds a pointer to a list that's
  * manipulated from elsewhere.
  */
 
 class TargetListComponent : public SkyComponent
 {
   public:
     /**
      * @short Default constructor.
      */
     explicit TargetListComponent(SkyComposite *parent);
 
     /**
      * @short Constructor that sets up this target list
      */
     TargetListComponent(SkyComposite *parent, QList<SkyObject *> *objectList, QPen _pen,
-                        bool (*optionDrawSymbols)(void) = 0, bool (*optionDrawLabels)(void) = 0);
+                        bool (*optionDrawSymbols)(void) = nullptr, bool (*optionDrawLabels)(void) = nullptr);
 
     ~TargetListComponent() override;
 
     /**
      * @short Draw this component by iterating over the list.
      *
      * @note This method does not bother refreshing the coordinates of
      * the objects on the list. So this must be called only after the
      * objects are drawn in a given draw cycle.
      */
     void draw(SkyPainter *skyp) override;
 
     // FIXME: Maybe we should make these member objects private / protected?
     std::unique_ptr<SkyObjectList> list; // Pointer to list of objects to draw
     QPen pen;            // Pen to use to draw
 
     /**
      * @short Pointer to static method that tells us whether to draw this list or not
      * @note If the pointer is nullptr, the list is drawn nevertheless
      */
     bool (*drawSymbols)(void);
 
     /**
      * @short Pointer to static method that tells us whether to draw labels for this list or not
      * @note If the pointer is nullptr, labels are not drawn
      */
     bool (*drawLabels)(void);
 };
diff --git a/kstars/skyglpainter.h b/kstars/skyglpainter.h
index 563dd2afa..a475bd6d9 100644
--- a/kstars/skyglpainter.h
+++ b/kstars/skyglpainter.h
@@ -1,81 +1,81 @@
 /*
     Copyright (C) 2010 Henry de Valence <hdevalence@gmail.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License along
     with this program; if not, write to the Free Software Foundation, Inc.,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 */
 
 #ifndef SKYGLPAINTER_H
 #define SKYGLPAINTER_H
 
 #include <cstddef>
 #include <Eigen/Core>
 using namespace Eigen;
 
 #include "skypainter.h"
 #include "skyobjects/skyobject.h"
 #include "projections/projector.h"
 
 class QGLWidget;
 
 class SkyGLPainter : public SkyPainter
 {
   public:
     explicit SkyGLPainter(QGLWidget *widget);
     bool drawPlanet(KSPlanetBase *planet) override;
     bool drawDeepSkyObject(DeepSkyObject *obj, bool drawImage = false) override;
     bool drawPointSource(SkyPoint *loc, float mag, char sp = 'A') override;
     void drawSkyPolygon(LineList *list, bool forceClip = true) override;
-    void drawSkyPolyline(LineList *list, SkipHashList *skipList = 0, LineListLabel *label = 0) override;
+    void drawSkyPolyline(LineList *list, SkipHashList *skipList = nullptr, LineListLabel *label = nullptr) override;
     void drawSkyLine(SkyPoint *a, SkyPoint *b) override;
     void drawSkyBackground() override;
     void drawObservingList(const QList<SkyObject *> &obs) override;
     void drawFlags() override;
     void end() override;
     void begin() override;
     void setBrush(const QBrush &brush) override;
     void setPen(const QPen &pen) override;
-    void drawHorizon(bool filled, SkyPoint *labelPoint = 0, bool *drawLabel = 0) override;
+    void drawHorizon(bool filled, SkyPoint *labelPoint = nullptr, bool *drawLabel = nullptr) override;
     bool drawSatellite(Satellite *sat) override;
     bool drawSupernova(Supernova *sup) override;
     void drawText(int x, int y, const QString text, QFont font, QColor color);
     bool drawConstellationArtImage(ConstellationsArt *obj) override;
     bool drawHips() override;
 
   private:
     bool addItem(SkyPoint *p, int type, float width, char sp = 'a');
     void drawBuffer(int type);
     void drawPolygon(const QVector<Vector2f> &poly, bool convex = true, bool flush_buffers = true);
 
     /** Render textured rectangle on screeen. Parameters are texture
          *  to be used, position, orientation and size of rectangle*/
     void drawTexturedRectangle(const QImage &img, const Vector2f &pos, const float angle, const float sizeX,
                                const float sizeY);
 
     const Projector *m_proj;
 
     Vector4f m_pen;
     static const int BUFSIZE = 512;
     ///FIXME: what kind of TYPE_UNKNOWN objects are there?
     static const int NUMTYPES = (int)SkyObject::TYPE_UNKNOWN + 1;
     static Vector2f m_vertex[NUMTYPES][6 * BUFSIZE];
     static Vector2f m_texcoord[NUMTYPES][6 * BUFSIZE];
     static Vector3f m_color[NUMTYPES][6 * BUFSIZE];
     static int m_idx[NUMTYPES];
     static bool m_init;  ///< keep track of whether we have filled the texcoord array
     QGLWidget *m_widget; // Pointer to (GL) widget on which we are painting
 };
 
 #endif // SKYGLPAINTER_H
diff --git a/kstars/skymap.cpp b/kstars/skymap.cpp
index 8581d9c54..71674563a 100644
--- a/kstars/skymap.cpp
+++ b/kstars/skymap.cpp
@@ -1,1419 +1,1419 @@
 /**************************************************************************
                           skymap.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sat Feb 10 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifdef _WIN32
 #include <windows.h>
 #endif
 
 #include "skymap.h"
 
 #include "fov.h"
 #include "imageviewer.h"
 #include "ksdssdownloader.h"
 #include "kspaths.h"
 #include "kspopupmenu.h"
 #include "kstars.h"
 #include "ksutils.h"
 #include "Options.h"
 #include "skymapcomposite.h"
 #ifdef HAVE_OPENGL
 #include "skymapgldraw.h"
 #endif
 #include "skymapqdraw.h"
 #include "starhopperdialog.h"
 #include "starobject.h"
 #include "texturemanager.h"
 #include "dialogs/detaildialog.h"
 #include "printing/printingwizard.h"
 #include "skycomponents/flagcomponent.h"
 #include "skyobjects/deepskyobject.h"
 #include "skyobjects/ksplanetbase.h"
 #include "tools/flagmanager.h"
 #include "widgets/infoboxwidget.h"
 #include "projections/azimuthalequidistantprojector.h"
 #include "projections/equirectangularprojector.h"
 #include "projections/lambertprojector.h"
 #include "projections/gnomonicprojector.h"
 #include "projections/orthographicprojector.h"
 #include "projections/stereographicprojector.h"
 
 #include <KActionCollection>
 #include <KToolBar>
 #include <KToolInvocation>
 
 #include <QBitmap>
 #include <QToolTip>
 #include <QInputDialog>
 #include <QDesktopServices>
 
 #ifdef HAVE_XPLANET
 #include <QProcess>
 #include <QFileDialog>
 #endif
 
 #include <cmath>
 
 namespace
 {
 // Draw bitmap for zoom cursor. Width is size of pen to draw with.
 QBitmap zoomCursorBitmap(int width)
 {
     QBitmap b(32, 32);
     b.fill(Qt::color0);
     int mx = 16, my = 16;
     // Begin drawing
     QPainter p;
     p.begin(&b);
     p.setPen(QPen(Qt::color1, width));
     p.drawEllipse(mx - 7, my - 7, 14, 14);
     p.drawLine(mx + 5, my + 5, mx + 11, my + 11);
     p.end();
     return b;
 }
 
 // Draw bitmap for default cursor. Width is size of pen to draw with.
 QBitmap defaultCursorBitmap(int width)
 {
     QBitmap b(32, 32);
     b.fill(Qt::color0);
     int mx = 16, my = 16;
     // Begin drawing
     QPainter p;
     p.begin(&b);
     p.setPen(QPen(Qt::color1, width));
     // 1. diagonal
     p.drawLine(mx - 2, my - 2, mx - 8, mx - 8);
     p.drawLine(mx + 2, my + 2, mx + 8, mx + 8);
     // 2. diagonal
     p.drawLine(mx - 2, my + 2, mx - 8, mx + 8);
     p.drawLine(mx + 2, my - 2, mx + 8, mx - 8);
     p.end();
     return b;
 }
 }
 
-SkyMap *SkyMap::pinstance = 0;
+SkyMap *SkyMap::pinstance = nullptr;
 
 SkyMap *SkyMap::Create()
 {
     delete pinstance;
     pinstance = new SkyMap();
     return pinstance;
 }
 
 SkyMap *SkyMap::Instance()
 {
     return pinstance;
 }
 
 SkyMap::SkyMap()
-    : QGraphicsView(KStars::Instance()), computeSkymap(true), rulerMode(false), data(KStarsData::Instance()), pmenu(0),
-      ClickedObject(0), FocusObject(0), m_proj(0), m_previewLegend(false), m_objPointingMode(false)
+    : QGraphicsView(KStars::Instance()), computeSkymap(true), rulerMode(false), data(KStarsData::Instance()), pmenu(nullptr),
+      ClickedObject(nullptr), FocusObject(nullptr), m_proj(nullptr), m_previewLegend(false), m_objPointingMode(false)
 {
     m_Scale = 1.0;
 
     ZoomRect = QRect();
 
     setDefaultMouseCursor(); // set the cross cursor
 
     QPalette p = palette();
     p.setColor(QPalette::Window, QColor(data->colorScheme()->colorNamed("SkyColor")));
     setPalette(p);
 
     setFocusPolicy(Qt::StrongFocus);
     setMinimumSize(380, 250);
     setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding));
     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     setStyleSheet("QGraphicsView { border-style: none; }");
 
     setMouseTracking(true); //Generate MouseMove events!
     midMouseButtonDown = false;
     mouseButtonDown    = false;
     slewing            = false;
     clockSlewing       = false;
 
     ClickedObject = nullptr;
     FocusObject   = nullptr;
 
-    m_SkyMapDraw = 0;
+    m_SkyMapDraw = nullptr;
 
     pmenu = new KSPopupMenu();
 
     setupProjector();
 
     //Initialize Transient label stuff
     m_HoverTimer.setSingleShot(true); // using this timer as a single shot timer
 
     connect(&m_HoverTimer, SIGNAL(timeout()), this, SLOT(slotTransientLabel()));
     connect(this, SIGNAL(destinationChanged()), this, SLOT(slewFocus()));
     connect(KStarsData::Instance(), SIGNAL(skyUpdate(bool)), this, SLOT(slotUpdateSky(bool)));
 
     // Time infobox
     m_timeBox = new InfoBoxWidget(Options::shadeTimeBox(), Options::positionTimeBox(), Options::stickyTimeBox(),
                                   QStringList(), this);
     m_timeBox->setVisible(Options::showTimeBox());
     connect(data->clock(), SIGNAL(timeChanged()), m_timeBox, SLOT(slotTimeChanged()));
     connect(data->clock(), SIGNAL(timeAdvanced()), m_timeBox, SLOT(slotTimeChanged()));
 
     // Geo infobox
     m_geoBox = new InfoBoxWidget(Options::shadeGeoBox(), Options::positionGeoBox(), Options::stickyGeoBox(),
                                  QStringList(), this);
     m_geoBox->setVisible(Options::showGeoBox());
     connect(data, SIGNAL(geoChanged()), m_geoBox, SLOT(slotGeoChanged()));
 
     // Object infobox
     m_objBox = new InfoBoxWidget(Options::shadeFocusBox(), Options::positionFocusBox(), Options::stickyFocusBox(),
                                  QStringList(), this);
     m_objBox->setVisible(Options::showFocusBox());
     connect(this, SIGNAL(objectChanged(SkyObject*)), m_objBox, SLOT(slotObjectChanged(SkyObject*)));
     connect(this, SIGNAL(positionChanged(SkyPoint*)), m_objBox, SLOT(slotPointChanged(SkyPoint*)));
 
     m_SkyMapDraw = new SkyMapQDraw(this);
     m_SkyMapDraw->setMouseTracking(true);
 
     m_SkyMapDraw->setParent(this->viewport());
     m_SkyMapDraw->show();
 
     m_iboxes = new InfoBoxes(m_SkyMapDraw);
 
     m_iboxes->setVisible(Options::showInfoBoxes());
     m_iboxes->addInfoBox(m_timeBox);
     m_iboxes->addInfoBox(m_geoBox);
     m_iboxes->addInfoBox(m_objBox);
 }
 
 void SkyMap::slotToggleGeoBox(bool flag)
 {
     m_geoBox->setVisible(flag);
 }
 
 void SkyMap::slotToggleFocusBox(bool flag)
 {
     m_objBox->setVisible(flag);
 }
 
 void SkyMap::slotToggleTimeBox(bool flag)
 {
     m_timeBox->setVisible(flag);
 }
 
 void SkyMap::slotToggleInfoboxes(bool flag)
 {
     m_iboxes->setVisible(flag);
 }
 
 SkyMap::~SkyMap()
 {
     /* == Save infoxes status into Options == */
     Options::setShowInfoBoxes(m_iboxes->isVisibleTo(parentWidget()));
     // Time box
     Options::setPositionTimeBox(m_timeBox->pos());
     Options::setShadeTimeBox(m_timeBox->shaded());
     Options::setStickyTimeBox(m_timeBox->sticky());
     Options::setShowTimeBox(m_timeBox->isVisibleTo(m_iboxes));
     // Geo box
     Options::setPositionGeoBox(m_geoBox->pos());
     Options::setShadeGeoBox(m_geoBox->shaded());
     Options::setStickyGeoBox(m_geoBox->sticky());
     Options::setShowGeoBox(m_geoBox->isVisibleTo(m_iboxes));
     // Obj box
     Options::setPositionFocusBox(m_objBox->pos());
     Options::setShadeFocusBox(m_objBox->shaded());
     Options::setStickyFocusBox(m_objBox->sticky());
     Options::setShowFocusBox(m_objBox->isVisibleTo(m_iboxes));
 
     //store focus values in Options
     //If not tracking and using Alt/Az coords, stor the Alt/Az coordinates
     if (Options::useAltAz() && !Options::isTracking())
     {
         Options::setFocusRA(focus()->az().Degrees());
         Options::setFocusDec(focus()->alt().Degrees());
     }
     else
     {
         Options::setFocusRA(focus()->ra().Hours());
         Options::setFocusDec(focus()->dec().Degrees());
     }
 
 #ifdef HAVE_OPENGL
     delete m_SkyMapGLDraw;
     delete m_SkyMapQDraw;
     m_SkyMapDraw = 0; // Just a formality
 #else
     delete m_SkyMapDraw;
 #endif
 
     delete pmenu;
 
     delete m_proj;
 
-    pinstance = 0;
+    pinstance = nullptr;
 }
 
 void SkyMap::showFocusCoords()
 {
     if (focusObject() && Options::isTracking())
         emit objectChanged(focusObject());
     else
         emit positionChanged(focus());
 }
 
 void SkyMap::slotTransientLabel()
 {
     //This function is only called if the HoverTimer manages to timeout.
     //(HoverTimer is restarted with every mouseMoveEvent; so if it times
     //out, that means there was no mouse movement for HOVER_INTERVAL msec.)
     if (hasFocus() && !slewing &&
         !(Options::useAltAz() && Options::showGround() && SkyPoint::refract(m_MousePoint.alt()).Degrees() < 0.0))
     {
         double maxrad = 1000.0 / Options::zoomFactor();
         SkyObject *so = data->skyComposite()->objectNearest(&m_MousePoint, maxrad);
 
         if (so && !isObjectLabeled(so))
         {
             QToolTip::showText(QCursor::pos(),
                                i18n("%1: %2<sup>m</sup>", so->translatedLongName(), QString::number(so->mag(), 'f', 1)),
                                this);
         }
     }
 }
 
 //Slots
 
 void SkyMap::setClickedObject(SkyObject *o)
 {
     ClickedObject = o;
 }
 
 void SkyMap::setFocusObject(SkyObject *o)
 {
     FocusObject = o;
     if (FocusObject)
         Options::setFocusObject(FocusObject->name());
     else
         Options::setFocusObject(i18n("nothing"));
 }
 
 void SkyMap::slotCenter()
 {
     KStars *kstars        = KStars::Instance();
     TrailObject *trailObj = dynamic_cast<TrailObject *>(focusObject());
 
     setFocusPoint(clickedPoint());
     if (Options::useAltAz())
     {
         // JM 2016-09-12: Following call has problems when ra0/dec0 of an object are not valid for example
         // because they're solar system bodies. So it creates a lot of issues. It is disabled and centering
         // works correctly for all different body types as I tested.
         DeepSkyObject *dso = dynamic_cast<DeepSkyObject *>(focusObject());
         if (dso)
             focusPoint()->updateCoords(data->updateNum(), true, data->geo()->lat(), data->lst(), false);
         focusPoint()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     }
     else
         focusPoint()->updateCoords(data->updateNum(), true, data->geo()->lat(), data->lst(), false);
     qDebug() << "Centering on " << focusPoint()->ra().toHMSString() << " " << focusPoint()->dec().toDMSString();
 
     //clear the planet trail of old focusObject, if it was temporary
     if (trailObj && data->temporaryTrail)
     {
         trailObj->clearTrail();
         data->temporaryTrail = false;
     }
 
     //If the requested object is below the opaque horizon, issue a warning message
     //(unless user is already pointed below the horizon)
     if (Options::useAltAz() && Options::showGround() && focus()->alt().Degrees() > -1.0 &&
         focusPoint()->alt().Degrees() < -1.0)
     {
         QString caption = i18n("Requested Position Below Horizon");
         QString message = i18n("The requested position is below the horizon.\nWould you like to go there anyway?");
         if (KMessageBox::warningYesNo(this, message, caption, KGuiItem(i18n("Go Anyway")),
                                       KGuiItem(i18n("Keep Position")), "dag_focus_below_horiz") == KMessageBox::No)
         {
             setClickedObject(nullptr);
             setFocusObject(nullptr);
             Options::setIsTracking(false);
 
             return;
         }
     }
 
     //set FocusObject before slewing.  Otherwise, KStarsData::updateTime() can reset
     //destination to previous object...
     setFocusObject(ClickedObject);
     Options::setIsTracking(true);
     if (kstars)
     {
         kstars->actionCollection()
             ->action("track_object")
             ->setIcon(QIcon::fromTheme("document-encrypt", QIcon(":/icons/breeze/default/document-encrypt.svg")));
         kstars->actionCollection()->action("track_object")->setText(i18n("Stop &Tracking"));
     }
 
     //If focusObject is a SS body and doesn't already have a trail, set the temporaryTrail
 
     if (Options::useAutoTrail() && trailObj && trailObj->hasTrail())
     {
         trailObj->addToTrail();
         data->temporaryTrail = true;
     }
 
     //update the destination to the selected coordinates
     if (Options::useAltAz())
     {
         setDestinationAltAz(focusPoint()->altRefracted(), focusPoint()->az());
     }
     else
     {
         setDestination(*focusPoint());
     }
 
     focusPoint()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
 
     //display coordinates in statusBar
     emit mousePointChanged(focusPoint());
     showFocusCoords(); //update FocusBox
 }
 
 void SkyMap::slotUpdateSky(bool now)
 {
     // Code moved from KStarsData::updateTime()
     //Update focus
     updateFocus();
 
     if (now)
         QTimer::singleShot(
             0, this,
             SLOT(forceUpdateNow())); // Why is it done this way rather than just calling forceUpdateNow()? -- asimha
     else
         forceUpdate();
 }
 
 void SkyMap::slotDSS()
 {
     dms ra(0.0), dec(0.0);
     QString urlstring;
 
     //ra and dec must be the coordinates at J2000.  If we clicked on an object, just use the object's ra0, dec0 coords
     //if we clicked on empty sky, we need to precess to J2000.
     if (clickedObject())
     {
         urlstring = KSDssDownloader::getDSSURL(clickedObject());
     }
     else
     {
         SkyPoint deprecessedPoint = clickedPoint()->deprecess(data->updateNum());
         ra                        = deprecessedPoint.ra();
         dec                       = deprecessedPoint.dec();
         urlstring                 = KSDssDownloader::getDSSURL(ra, dec); // Use default size for non-objects
     }
 
     QUrl url(urlstring);
 
     KStars *kstars = KStars::Instance();
     if (kstars)
     {
         new ImageViewer(
             url, i18n("Digitized Sky Survey image provided by the Space Telescope Science Institute [public domain]."),
             this);
         //iv->show();
     }
 }
 
 void SkyMap::slotSDSS()
 {
     // TODO: Remove code duplication -- we have the same stuff
     // implemented in ObservingList::setCurrentImage() etc. in
     // tools/observinglist.cpp; must try to de-duplicate as much as
     // possible.
     QString URLprefix("http://casjobs.sdss.org/ImgCutoutDR6/getjpeg.aspx?");
     QString URLsuffix("&scale=1.0&width=600&height=600&opt=GST&query=SR(10,20)");
     dms ra(0.0), dec(0.0);
     QString RAString, DecString;
 
     //ra and dec must be the coordinates at J2000.  If we clicked on an object, just use the object's ra0, dec0 coords
     //if we clicked on empty sky, we need to precess to J2000.
     if (clickedObject())
     {
         ra  = clickedObject()->ra0();
         dec = clickedObject()->dec0();
     }
     else
     {
         SkyPoint deprecessedPoint = clickedPoint()->deprecess(data->updateNum());
         ra                        = deprecessedPoint.ra();
         dec                       = deprecessedPoint.dec();
     }
 
     RAString  = RAString.sprintf("ra=%f", ra.Degrees());
     DecString = DecString.sprintf("&dec=%f", dec.Degrees());
 
     //concat all the segments into the kview command line:
     QUrl url(URLprefix + RAString + DecString + URLsuffix);
 
     KStars *kstars = KStars::Instance();
     if (kstars)
     {
         new ImageViewer(url,
                         i18n("Sloan Digital Sky Survey image provided by the Astrophysical Research Consortium [free "
                              "for non-commercial use]."),
                         this);
         //iv->show();
     }
 }
 
 void SkyMap::slotEyepieceView()
 {
     KStars::Instance()->slotEyepieceView((clickedObject() ? clickedObject() : clickedPoint()));
 }
 void SkyMap::slotBeginAngularDistance()
 {
     beginRulerMode(false);
 }
 
 void SkyMap::slotBeginStarHop()
 {
     beginRulerMode(true);
 }
 
 void SkyMap::beginRulerMode(bool starHopRuler)
 {
     rulerMode         = true;
     starHopDefineMode = starHopRuler;
     AngularRuler.clear();
 
     //If the cursor is near a SkyObject, reset the AngularRuler's
     //start point to the position of the SkyObject
     double maxrad = 1000.0 / Options::zoomFactor();
     SkyObject *so = data->skyComposite()->objectNearest(clickedPoint(), maxrad);
     if (so)
     {
         AngularRuler.append(so);
         AngularRuler.append(so);
         m_rulerStartPoint = so;
     }
     else
     {
         AngularRuler.append(clickedPoint());
         AngularRuler.append(clickedPoint());
         m_rulerStartPoint = clickedPoint();
     }
 
     AngularRuler.update(data);
 }
 
 void SkyMap::slotEndRulerMode()
 {
     if (!rulerMode)
         return;
     if (!starHopDefineMode) // Angular Ruler
     {
         QString sbMessage;
 
         //If the cursor is near a SkyObject, reset the AngularRuler's
         //end point to the position of the SkyObject
         double maxrad = 1000.0 / Options::zoomFactor();
         SkyPoint *rulerEndPoint;
         SkyObject *so = data->skyComposite()->objectNearest(clickedPoint(), maxrad);
         if (so)
         {
             AngularRuler.setPoint(1, so);
             sbMessage     = so->translatedLongName() + "   ";
             rulerEndPoint = so;
         }
         else
         {
             AngularRuler.setPoint(1, clickedPoint());
             rulerEndPoint = clickedPoint();
         }
 
         rulerMode = false;
         AngularRuler.update(data);
         dms angularDistance = AngularRuler.angularSize();
 
         sbMessage += i18n("Angular distance: %1", angularDistance.toDMSString());
 
         const StarObject *p1 = dynamic_cast<const StarObject *>(m_rulerStartPoint);
         const StarObject *p2 = dynamic_cast<const StarObject *>(rulerEndPoint);
         qDebug() << "Starobjects? " << p1 << p2;
         if (p1 && p2)
             qDebug() << "Distances: " << p1->distance() << "pc; " << p2->distance() << "pc";
         if (p1 && p2 && std::isfinite(p1->distance()) && std::isfinite(p2->distance()) && p1->distance() > 0 &&
             p2->distance() > 0)
         {
             double dist = sqrt(p1->distance() * p1->distance() + p2->distance() * p2->distance() -
                                2 * p1->distance() * p2->distance() * cos(angularDistance.radians()));
             qDebug() << "Could calculate physical distance: " << dist << " pc";
             sbMessage += i18n("; Physical distance: %1 pc", QString::number(dist));
         }
 
         AngularRuler.clear();
 
         // Create unobsructive message box with suicidal tendencies
         // to display result.
         InfoBoxWidget *box = new InfoBoxWidget(true, mapFromGlobal(QCursor::pos()), 0, QStringList(sbMessage), this);
         connect(box, SIGNAL(clicked()), box, SLOT(deleteLater()));
         QTimer::singleShot(5000, box, SLOT(deleteLater()));
         box->adjust();
         box->show();
     }
     else // Star Hop
     {
         StarHopperDialog *shd    = new StarHopperDialog(this);
         const SkyPoint &startHop = *AngularRuler.point(0);
         const SkyPoint &stopHop  = *clickedPoint();
         double fov; // Field of view in arcminutes
         bool ok;    // true if user did not cancel the operation
         if (data->getAvailableFOVs().size() == 1)
         {
             // Exactly 1 FOV symbol visible, so use that. Also assume a circular FOV of size min{sizeX, sizeY}
             FOV *f = data->getAvailableFOVs().first();
             fov    = ((f->sizeX() >= f->sizeY() && f->sizeY() != 0) ? f->sizeY() : f->sizeX());
             ok     = true;
         }
         else if (!data->getAvailableFOVs().isEmpty())
         {
             // Ask the user to choose from a list of available FOVs.
             FOV const *f;
             QMap<QString, double> nameToFovMap;
             foreach (f, data->getAvailableFOVs())
             {
                 nameToFovMap.insert(f->name(),
                                     ((f->sizeX() >= f->sizeY() && f->sizeY() != 0) ? f->sizeY() : f->sizeX()));
             }
             fov = nameToFovMap[QInputDialog::getItem(this, i18n("Star Hopper: Choose a field-of-view"),
                                                      i18n("FOV to use for star hopping:"), nameToFovMap.uniqueKeys(), 0,
                                                      false, &ok)];
         }
         else
         {
             // Ask the user to enter a field of view
             fov =
                 QInputDialog::getDouble(this, i18n("Star Hopper: Enter field-of-view to use"),
                                         i18n("FOV to use for star hopping (in arcminutes):"), 60.0, 1.0, 600.0, 1, &ok);
         }
 
         Q_ASSERT(fov > 0.0);
 
         if (ok)
         {
             qDebug() << "fov = " << fov;
 
             shd->starHop(startHop, stopHop, fov / 60.0, 9.0); //FIXME: Hardcoded maglimit value
             shd->show();
         }
 
         rulerMode = false;
     }
 }
 
 void SkyMap::slotCancelRulerMode(void)
 {
     rulerMode = false;
     AngularRuler.clear();
 }
 
 void SkyMap::slotAddFlag()
 {
     KStars *ks = KStars::Instance();
 
     // popup FlagManager window and update coordinates
     ks->slotFlagManager();
     ks->flagManager()->clearFields();
 
     //ra and dec must be the coordinates at J2000.  If we clicked on an object, just use the object's ra0, dec0 coords
     //if we clicked on empty sky, we need to precess to J2000.
 
     dms J2000RA, J2000DE;
 
     if (clickedObject())
     {
         J2000RA = clickedObject()->ra0();
         J2000DE = clickedObject()->dec0();
     }
     else
     {
         SkyPoint deprecessedPoint = clickedPoint()->deprecess(data->updateNum());
         J2000RA                   = deprecessedPoint.ra();
         J2000DE                   = deprecessedPoint.dec();
     }
 
     ks->flagManager()->setRaDec(J2000RA, J2000DE);
 }
 
 void SkyMap::slotEditFlag(int flagIdx)
 {
     KStars *ks = KStars::Instance();
 
     // popup FlagManager window and switch to selected flag
     ks->slotFlagManager();
     ks->flagManager()->showFlag(flagIdx);
 }
 
 void SkyMap::slotDeleteFlag(int flagIdx)
 {
     KStars *ks = KStars::Instance();
 
     ks->data()->skyComposite()->flags()->remove(flagIdx);
     ks->data()->skyComposite()->flags()->saveToFile();
 
     // if there is FlagManager created, update its flag model
     if (ks->flagManager())
     {
         ks->flagManager()->deleteFlagItem(flagIdx);
     }
 }
 
 void SkyMap::slotImage()
 {
     QString message = ((QAction *)sender())->text();
     message         = message.remove('&'); //Get rid of accelerator markers
 
     // Need to do this because we are comparing translated strings
     int index = -1;
     for (int i = 0; i < clickedObject()->ImageTitle().size(); ++i)
     {
         if (i18nc("Image/info menu item (should be translated)",
                   clickedObject()->ImageTitle().at(i).toLocal8Bit().data()) == message)
         {
             index = i;
             break;
         }
     }
 
     QString sURL;
     if (index >= 0 && index < clickedObject()->ImageList().size())
     {
         sURL = clickedObject()->ImageList()[index];
     }
     else
     {
         qWarning() << "ImageList index out of bounds: " << index;
         if (index == -1)
         {
             qWarning() << "Message string \"" << message << "\" not found in ImageTitle.";
             qDebug() << clickedObject()->ImageTitle();
         }
     }
 
     QUrl url(sURL);
     if (!url.isEmpty())
         new ImageViewer(url, clickedObject()->messageFromTitle(message), this);
 }
 
 void SkyMap::slotInfo()
 {
     QString message = ((QAction *)sender())->text();
     message         = message.remove('&'); //Get rid of accelerator markers
 
     // Need to do this because we are comparing translated strings
     int index = -1;
     for (int i = 0; i < clickedObject()->InfoTitle().size(); ++i)
     {
         if (i18nc("Image/info menu item (should be translated)",
                   clickedObject()->InfoTitle().at(i).toLocal8Bit().data()) == message)
         {
             index = i;
             break;
         }
     }
 
     QString sURL;
     if (index >= 0 && index < clickedObject()->InfoList().size())
     {
         sURL = clickedObject()->InfoList()[index];
     }
     else
     {
         qWarning() << "InfoList index out of bounds: " << index;
         if (index == -1)
         {
             qWarning() << "Message string \"" << message << "\" not found in InfoTitle.";
             qDebug() << clickedObject()->InfoTitle();
         }
     }
 
     QUrl url(sURL);
     if (!url.isEmpty())
         QDesktopServices::openUrl(url);
 }
 
 bool SkyMap::isObjectLabeled(SkyObject *object)
 {
     return data->skyComposite()->labelObjects().contains(object);
 }
 
 SkyPoint SkyMap::getCenterPoint()
 {
     SkyPoint retVal;
     // FIXME: subtraction of these 0.00001 is a simple workaround, because wrong
     // SkyPoint is returned when _exact_ center of SkyMap is passed to the projector.
     retVal = projector()->fromScreen(QPointF((qreal)width() / 2 - 0.00001, (qreal)height() / 2 - 0.00001), data->lst(),
                                      data->geo()->lat());
     return retVal;
 }
 
 void SkyMap::slotRemoveObjectLabel()
 {
     data->skyComposite()->removeNameLabel(clickedObject());
     forceUpdate();
 }
 
 void SkyMap::slotAddObjectLabel()
 {
     data->skyComposite()->addNameLabel(clickedObject());
     forceUpdate();
 }
 
 void SkyMap::slotRemovePlanetTrail()
 {
     TrailObject *tobj = dynamic_cast<TrailObject *>(clickedObject());
     if (tobj)
     {
         tobj->clearTrail();
         forceUpdate();
     }
 }
 
 void SkyMap::slotAddPlanetTrail()
 {
     TrailObject *tobj = dynamic_cast<TrailObject *>(clickedObject());
     if (tobj)
     {
         tobj->addToTrail();
         forceUpdate();
     }
 }
 
 void SkyMap::slotDetail()
 {
     // check if object is selected
     if (!clickedObject())
     {
         KMessageBox::sorry(this, i18n("No object selected."), i18n("Object Details"));
         return;
     }
     DetailDialog *detail = new DetailDialog(clickedObject(), data->ut(), data->geo(), KStars::Instance());
     detail->setAttribute(Qt::WA_DeleteOnClose);
     detail->show();
 }
 
 void SkyMap::slotObjectSelected()
 {
     if (m_objPointingMode && KStars::Instance()->printingWizard())
     {
         KStars::Instance()->printingWizard()->pointingDone(clickedObject());
         m_objPointingMode = false;
     }
 }
 
 void SkyMap::slotCancelLegendPreviewMode()
 {
     m_previewLegend = false;
     forceUpdate(true);
     KStars::Instance()->showImgExportDialog();
 }
 
 void SkyMap::slotFinishFovCaptureMode()
 {
     if (m_fovCaptureMode && KStars::Instance()->printingWizard())
     {
         KStars::Instance()->printingWizard()->fovCaptureDone();
         m_fovCaptureMode = false;
     }
 }
 
 void SkyMap::slotCaptureFov()
 {
     if (KStars::Instance()->printingWizard())
     {
         KStars::Instance()->printingWizard()->captureFov();
     }
 }
 
 void SkyMap::slotClockSlewing()
 {
     //If the current timescale exceeds slewTimeScale, set clockSlewing=true, and stop the clock.
     if ((fabs(data->clock()->scale()) > Options::slewTimeScale()) ^ clockSlewing)
     {
         data->clock()->setManualMode(!clockSlewing);
         clockSlewing = !clockSlewing;
         // don't change automatically the DST status
         KStars *kstars = KStars::Instance();
         if (kstars)
             kstars->updateTime(false);
     }
 }
 
 void SkyMap::setFocus(SkyPoint *p)
 {
     setFocus(p->ra(), p->dec());
 }
 
 void SkyMap::setFocus(const dms &ra, const dms &dec)
 {
     Options::setFocusRA(ra.Hours());
     Options::setFocusDec(dec.Degrees());
 
     focus()->set(ra, dec);
     focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
 }
 
 void SkyMap::setFocusAltAz(const dms &alt, const dms &az)
 {
     Options::setFocusRA(focus()->ra().Hours());
     Options::setFocusDec(focus()->dec().Degrees());
     focus()->setAlt(alt);
     focus()->setAz(az);
     focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
 
     slewing = false;
     forceUpdate(); //need a total update, or slewing with the arrow keys doesn't work.
 }
 
 void SkyMap::setDestination(const SkyPoint &p)
 {
     setDestination(p.ra(), p.dec());
 }
 
 void SkyMap::setDestination(const dms &ra, const dms &dec)
 {
     destination()->set(ra, dec);
     destination()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     emit destinationChanged();
 }
 
 void SkyMap::setDestinationAltAz(const dms &alt, const dms &az)
 {
     destination()->setAlt(alt);
     destination()->setAz(az);
     destination()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
     emit destinationChanged();
 }
 
 void SkyMap::setClickedPoint(SkyPoint *f)
 {
     ClickedPoint = *f;
 }
 
 void SkyMap::updateFocus()
 {
     if (slewing)
         return;
 
     //Tracking on an object
     if (Options::isTracking() && focusObject() != nullptr)
     {
         if (Options::useAltAz())
         {
             //Tracking any object in Alt/Az mode requires focus updates
             focusObject()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             setFocusAltAz(focusObject()->altRefracted(), focusObject()->az());
             focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
             setDestination(*focus());
         }
         else
         {
             //Tracking in equatorial coords
             setFocus(focusObject());
             focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             setDestination(*focus());
         }
 
         //Tracking on empty sky
     }
     else if (Options::isTracking() && focusPoint() != nullptr)
     {
         if (Options::useAltAz())
         {
             //Tracking on empty sky in Alt/Az mode
             setFocus(focusPoint());
             focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             setDestination(*focus());
         }
 
         // Not tracking and not slewing, let sky drift by
         // This means that horizontal coordinates are constant.
     }
     else
     {
         focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
     }
 }
 
 void SkyMap::slewFocus()
 {
     //Don't slew if the mouse button is pressed
     //Also, no animated slews if the Manual Clock is active
     //08/2002: added possibility for one-time skipping of slew with snapNextFocus
     if (!mouseButtonDown)
     {
         bool goSlew = (Options::useAnimatedSlewing() && !data->snapNextFocus()) &&
                       !(data->clock()->isManualMode() && data->clock()->isActive());
         if (goSlew)
         {
             double dX, dY;
             double maxstep = 10.0;
             if (Options::useAltAz())
             {
                 dX = destination()->az().Degrees() - focus()->az().Degrees();
                 dY = destination()->alt().Degrees() - focus()->alt().Degrees();
             }
             else
             {
                 dX = destination()->ra().Degrees() - focus()->ra().Degrees();
                 dY = destination()->dec().Degrees() - focus()->dec().Degrees();
             }
 
             //switch directions to go the short way around the celestial sphere, if necessary.
             dX = KSUtils::reduceAngle(dX, -180.0, 180.0);
 
             double r0 = sqrt(dX * dX + dY * dY);
             if (r0 < 20.0) //smaller slews have smaller maxstep
             {
                 maxstep *= (10.0 + 0.5 * r0) / 20.0;
             }
             double step = 0.5;
             double r    = r0;
             while (r > step)
             {
                 //DEBUG
                 //qDebug() << step << ": " << r << ": " << r0 << endl;
                 double fX = dX / r;
                 double fY = dY / r;
 
                 if (Options::useAltAz())
                 {
                     focus()->setAlt(focus()->alt().Degrees() + fY * step);
                     focus()->setAz(dms(focus()->az().Degrees() + fX * step).reduce());
                     focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
                 }
                 else
                 {
                     fX = fX / 15.; //convert RA degrees to hours
                     SkyPoint newFocus(focus()->ra().Hours() + fX * step, focus()->dec().Degrees() + fY * step);
                     setFocus(&newFocus);
                     focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
                 }
 
                 slewing = true;
 
                 forceUpdate();
                 qApp->processEvents(); //keep up with other stuff
 
                 if (Options::useAltAz())
                 {
                     dX = destination()->az().Degrees() - focus()->az().Degrees();
                     dY = destination()->alt().Degrees() - focus()->alt().Degrees();
                 }
                 else
                 {
                     dX = destination()->ra().Degrees() - focus()->ra().Degrees();
                     dY = destination()->dec().Degrees() - focus()->dec().Degrees();
                 }
 
                 //switch directions to go the short way around the celestial sphere, if necessary.
                 dX = KSUtils::reduceAngle(dX, -180.0, 180.0);
                 r  = sqrt(dX * dX + dY * dY);
 
                 //Modify step according to a cosine-shaped profile
                 //centered on the midpoint of the slew
                 //NOTE: don't allow the full range from -PI/2 to PI/2
                 //because the slew will never reach the destination as
                 //the speed approaches zero at the end!
                 double t = dms::PI * (r - 0.5 * r0) / (1.05 * r0);
                 step     = cos(t) * maxstep;
             }
         }
 
         //Either useAnimatedSlewing==false, or we have slewed, and are within one step of destination
         //set focus=destination.
         if (Options::useAltAz())
         {
             setFocusAltAz(destination()->alt(), destination()->az());
             focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
         }
         else
         {
             setFocus(destination());
             focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
         }
 
         slewing = false;
 
         //Turn off snapNextFocus, we only want it to happen once
         if (data->snapNextFocus())
         {
             data->setSnapNextFocus(false);
         }
 
         //Start the HoverTimer. if the user leaves the mouse in place after a slew,
         //we want to attach a label to the nearest object.
         if (Options::useHoverLabel())
             m_HoverTimer.start(HOVER_INTERVAL);
 
         forceUpdate();
     }
 }
 
 void SkyMap::slotZoomIn()
 {
     setZoomFactor(Options::zoomFactor() * DZOOM);
 }
 
 void SkyMap::slotZoomOut()
 {
     setZoomFactor(Options::zoomFactor() / DZOOM);
 }
 
 void SkyMap::slotZoomDefault()
 {
     setZoomFactor(DEFAULTZOOM);
 }
 
 void SkyMap::setZoomFactor(double factor)
 {
     Options::setZoomFactor(KSUtils::clamp(factor, MINZOOM, MAXZOOM));
     forceUpdate();
     emit zoomChanged();
 }
 
 // force a new calculation of the skymap (used instead of update(), which may skip the redraw)
 // if now=true, SkyMap::paintEvent() is run immediately, rather than being added to the event queue
 // also, determine new coordinates of mouse cursor.
 void SkyMap::forceUpdate(bool now)
 {
     QPoint mp(mapFromGlobal(QCursor::pos()));
     if (!projector()->unusablePoint(mp))
     {
         //determine RA, Dec of mouse pointer
         m_MousePoint = projector()->fromScreen(mp, data->lst(), data->geo()->lat());
     }
 
     computeSkymap = true;
 
     // Ensure that stars are recomputed
     data->incUpdateID();
 
     if (now)
         m_SkyMapDraw->repaint();
     else
         m_SkyMapDraw->update();
 }
 
 float SkyMap::fov()
 {
     float diagonalPixels = sqrt(static_cast<double>(width() * width() + height() * height()));
     return diagonalPixels / (2 * Options::zoomFactor() * dms::DegToRad);
 }
 
 void SkyMap::setupProjector()
 {
     //Update View Parameters for projection
     ViewParams p;
     p.focus         = focus();
     p.height        = height();
     p.width         = width();
     p.useAltAz      = Options::useAltAz();
     p.useRefraction = Options::useRefraction();
     p.zoomFactor    = Options::zoomFactor();
     p.fillGround    = Options::showGround();
     //Check if we need a new projector
     if (m_proj && Options::projection() == m_proj->type())
         m_proj->setViewParams(p);
     else
     {
         delete m_proj;
         switch (Options::projection())
         {
             case Gnomonic:
                 m_proj = new GnomonicProjector(p);
                 break;
             case Stereographic:
                 m_proj = new StereographicProjector(p);
                 break;
             case Orthographic:
                 m_proj = new OrthographicProjector(p);
                 break;
             case AzimuthalEquidistant:
                 m_proj = new AzimuthalEquidistantProjector(p);
                 break;
             case Equirectangular:
                 m_proj = new EquirectangularProjector(p);
                 break;
             case Lambert:
             default:
                 //TODO: implement other projection classes
                 m_proj = new LambertProjector(p);
                 break;
         }
     }
 }
 
 void SkyMap::setZoomMouseCursor()
 {
     mouseMoveCursor = false; // no mousemove cursor
     QBitmap cursor  = zoomCursorBitmap(2);
     QBitmap mask    = zoomCursorBitmap(4);
     setCursor(QCursor(cursor, mask));
 }
 
 void SkyMap::setDefaultMouseCursor()
 {
     mouseMoveCursor = false; // no mousemove cursor
     QBitmap cursor  = defaultCursorBitmap(2);
     QBitmap mask    = defaultCursorBitmap(3);
     setCursor(QCursor(cursor, mask));
 }
 
 void SkyMap::setMouseMoveCursor()
 {
     if (mouseButtonDown)
     {
         setCursor(Qt::SizeAllCursor); // cursor shape defined in qt
         mouseMoveCursor = true;
     }
 }
 
 void SkyMap::updateAngleRuler()
 {
     if (rulerMode && (!pmenu || !pmenu->isVisible()))
         AngularRuler.setPoint(1, &m_MousePoint);
     AngularRuler.update(data);
 }
 
 bool SkyMap::isSlewing() const
 {
     return (slewing || (clockSlewing && data->clock()->isActive()));
 }
 
 #ifdef HAVE_XPLANET
 void SkyMap::startXplanet(const QString &outputFile)
 {
     QString year, month, day, hour, minute, seconde, fov;
 
     // If Options::xplanetPath() is empty, return
     if (Options::xplanetPath().isEmpty())
     {
-        KMessageBox::error(0, i18n("Xplanet binary path is empty in config panel."));
+        KMessageBox::error(nullptr, i18n("Xplanet binary path is empty in config panel."));
         return;
     }
 
     // Format date
     if (year.setNum(data->ut().date().year()).size() == 1)
         year.push_front('0');
     if (month.setNum(data->ut().date().month()).size() == 1)
         month.push_front('0');
     if (day.setNum(data->ut().date().day()).size() == 1)
         day.push_front('0');
     if (hour.setNum(data->ut().time().hour()).size() == 1)
         hour.push_front('0');
     if (minute.setNum(data->ut().time().minute()).size() == 1)
         minute.push_front('0');
     if (seconde.setNum(data->ut().time().second()).size() == 1)
         seconde.push_front('0');
 
     // Create xplanet process
     QProcess *xplanetProc = new QProcess;
 
     // Add some options
     QStringList args;
     args << "-body" << clickedObject()->name().toLower() << "-geometry"
          << Options::xplanetWidth() + 'x' + Options::xplanetHeight() << "-date"
          << year + month + day + '.' + hour + minute + seconde << "-glare" << Options::xplanetGlare()
          << "-base_magnitude" << Options::xplanetMagnitude() << "-light_time"
          << "-window";
 
     // General options
     if (!Options::xplanetTitle().isEmpty())
         args << "-window_title"
              << "\"" + Options::xplanetTitle() + "\"";
     if (Options::xplanetFOV())
         args << "-fov" << fov.setNum(this->fov()).replace('.', ',');
     if (Options::xplanetConfigFile())
         args << "-config" << Options::xplanetConfigFilePath();
     if (Options::xplanetStarmap())
         args << "-starmap" << Options::xplanetStarmapPath();
     if (Options::xplanetArcFile())
         args << "-arc_file" << Options::xplanetArcFilePath();
     if (Options::xplanetWait())
         args << "-wait" << Options::xplanetWaitValue();
     if (!outputFile.isEmpty())
         args << "-output" << outputFile << "-quality" << Options::xplanetQuality();
 
     // Labels
     if (Options::xplanetLabel())
     {
         args << "-fontsize" << Options::xplanetFontSize() << "-color"
              << "0x" + Options::xplanetColor().mid(1) << "-date_format" << Options::xplanetDateFormat();
 
         if (Options::xplanetLabelGMT())
             args << "-gmtlabel";
         else
             args << "-label";
         if (!Options::xplanetLabelString().isEmpty())
             args << "-label_string"
                  << "\"" + Options::xplanetLabelString() + "\"";
         if (Options::xplanetLabelTL())
             args << "-labelpos"
                  << "+15+15";
         else if (Options::xplanetLabelTR())
             args << "-labelpos"
                  << "-15+15";
         else if (Options::xplanetLabelBR())
             args << "-labelpos"
                  << "-15-15";
         else if (Options::xplanetLabelBL())
             args << "-labelpos"
                  << "+15-15";
     }
 
     // Markers
     if (Options::xplanetMarkerFile())
         args << "-marker_file" << Options::xplanetMarkerFilePath();
     if (Options::xplanetMarkerBounds())
         args << "-markerbounds" << Options::xplanetMarkerBoundsPath();
 
     // Position
     if (Options::xplanetRandom())
         args << "-random";
     else
         args << "-latitude" << Options::xplanetLatitude() << "-longitude" << Options::xplanetLongitude();
 
     // Projection
     if (Options::xplanetProjection())
     {
         switch (Options::xplanetProjection())
         {
             case 1:
                 args << "-projection"
                      << "ancient";
                 break;
             case 2:
                 args << "-projection"
                      << "azimuthal";
                 break;
             case 3:
                 args << "-projection"
                      << "bonne";
                 break;
             case 4:
                 args << "-projection"
                      << "gnomonic";
                 break;
             case 5:
                 args << "-projection"
                      << "hemisphere";
                 break;
             case 6:
                 args << "-projection"
                      << "lambert";
                 break;
             case 7:
                 args << "-projection"
                      << "mercator";
                 break;
             case 8:
                 args << "-projection"
                      << "mollweide";
                 break;
             case 9:
                 args << "-projection"
                      << "orthographic";
                 break;
             case 10:
                 args << "-projection"
                      << "peters";
                 break;
             case 11:
                 args << "-projection"
                      << "polyconic";
                 break;
             case 12:
                 args << "-projection"
                      << "rectangular";
                 break;
             case 13:
                 args << "-projection"
                      << "tsc";
                 break;
             default:
                 break;
         }
         if (Options::xplanetBackground())
         {
             if (Options::xplanetBackgroundImage())
                 args << "-background" << Options::xplanetBackgroundImagePath();
             else
                 args << "-background"
                      << "0x" + Options::xplanetBackgroundColorValue().mid(1);
         }
     }
 
     // We add this option at the end otherwise it does not work (???)
     args << "-origin"
          << "earth";
 
     // Run xplanet
     //qDebug() << "Run:" << xplanetProc->program().join(" ");
 
     QString xPlanetLocation = Options::xplanetPath();
 
 #ifdef Q_OS_OSX
     if (Options::xplanetIsInternal())
     {
         xPlanetLocation   = QCoreApplication::applicationDirPath() + "/xplanet/bin/xplanet";
         QString searchDir = QCoreApplication::applicationDirPath() + "/xplanet/share/xplanet/";
         args << "-searchdir" << searchDir;
     }
 #endif
     xplanetProc->start(xPlanetLocation, args);
     if (xplanetProc)
     {
         xplanetProc->waitForFinished(1000);
         new ImageViewer(QUrl::fromLocalFile(outputFile),
                         "XPlanet View: " + clickedObject()->name() + ",  " + data->lt().date().toString() + ",  " +
                             data->lt().time().toString(),
                         this);
         //iv->show();
     }
     else
     {
         KMessageBox::sorry(this, i18n("XPlanet Program Error"));
     }
 }
 
 void SkyMap::slotXplanetToWindow()
 {
     QDir writableDir;
     QString xPlanetDirPath = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "xplanet";
     writableDir.mkpath(xPlanetDirPath);
     QString xPlanetPath = xPlanetDirPath + QDir::separator() + clickedObject()->name() + ".png";
     startXplanet(xPlanetPath);
 }
 
 void SkyMap::slotXplanetToFile()
 {
     QString filename = QFileDialog::getSaveFileName();
     if (!filename.isEmpty())
     {
         startXplanet(filename);
     }
 }
 #endif
diff --git a/kstars/skymapevents.cpp b/kstars/skymapevents.cpp
index 66d7096d7..e7b4417d8 100644
--- a/kstars/skymapevents.cpp
+++ b/kstars/skymapevents.cpp
@@ -1,742 +1,742 @@
 /***************************************************************************
                           skymapevents.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sat Feb 10 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 //This file contains Event handlers for the SkyMap class.
 
 #include "skymap.h"
 
 #include "ksplanetbase.h"
 #include "kspopupmenu.h"
 #include "kstars.h"
 #include "observinglist.h"
 #include "Options.h"
 #include "skyglpainter.h"
 #include "skyqpainter.h"
 #include "printing/simplefovexporter.h"
 #include "skycomponents/skylabeler.h"
 #include "skycomponents/skymapcomposite.h"
 #include "skycomponents/starcomponent.h"
 #include "widgets/infoboxwidget.h"
 
 #include <QStatusBar>
 #include <QToolTip>
 
 void SkyMap::resizeEvent(QResizeEvent *)
 {
     computeSkymap = true; // skymap must be new computed
 
     //FIXME: No equivalent for this line in Qt4 ??
     //	if ( testWState( Qt::WState_AutoMask ) ) updateMask();
 
     // Resize the widget that draws the sky map.
     // FIXME: The resize event doesn't pass to children. Any better way of doing this?
     m_SkyMapDraw->resize(size());
 
     // Resize infoboxes container.
     // FIXME: this is not really pretty. Maybe there are some better way to this???
     m_iboxes->resize(size());
 }
 
 void SkyMap::keyPressEvent(QKeyEvent *e)
 {
     bool arrowKeyPressed(false);
     bool shiftPressed(false);
     float step = 1.0;
     if (e->modifiers() & Qt::ShiftModifier)
     {
         step         = 10.0;
         shiftPressed = true;
     }
 
     //If the DBus resume key is not empty, then DBus processing is
     //paused while we wait for a keypress
     if (!data->resumeKey.isEmpty() && QKeySequence(e->key()) == data->resumeKey)
     {
         //The resumeKey was pressed.  Signal that it was pressed by
         //resetting it to empty; this will break the loop in
         //KStars::waitForKey()
         data->resumeKey = QKeySequence();
         return;
     }
 
     if (m_previewLegend)
     {
         slotCancelLegendPreviewMode();
     }
 
     switch (e->key())
     {
         case Qt::Key_Left:
             if (Options::useAltAz())
             {
                 focus()->setAz(dms(focus()->az().Degrees() - step * MINZOOM / Options::zoomFactor()).reduce());
                 focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
             }
             else
             {
                 focus()->setRA(focus()->ra().Hours() + 0.05 * step * MINZOOM / Options::zoomFactor());
                 focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             }
 
             arrowKeyPressed = true;
             slewing         = true;
             break;
 
         case Qt::Key_Right:
             if (Options::useAltAz())
             {
                 focus()->setAz(dms(focus()->az().Degrees() + step * MINZOOM / Options::zoomFactor()).reduce());
                 focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
             }
             else
             {
                 focus()->setRA(focus()->ra().Hours() - 0.05 * step * MINZOOM / Options::zoomFactor());
                 focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             }
 
             arrowKeyPressed = true;
             slewing         = true;
             break;
 
         case Qt::Key_Up:
             if (Options::useAltAz())
             {
                 focus()->setAlt(focus()->alt().Degrees() + step * MINZOOM / Options::zoomFactor());
                 if (focus()->alt().Degrees() > 90.0)
                     focus()->setAlt(90.0);
                 focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
             }
             else
             {
                 focus()->setDec(focus()->dec().Degrees() + step * MINZOOM / Options::zoomFactor());
                 if (focus()->dec().Degrees() > 90.0)
                     focus()->setDec(90.0);
                 focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             }
 
             arrowKeyPressed = true;
             slewing         = true;
             break;
 
         case Qt::Key_Down:
             if (Options::useAltAz())
             {
                 focus()->setAlt(focus()->alt().Degrees() - step * MINZOOM / Options::zoomFactor());
                 if (focus()->alt().Degrees() < -90.0)
                     focus()->setAlt(-90.0);
                 focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
             }
             else
             {
                 focus()->setDec(focus()->dec().Degrees() - step * MINZOOM / Options::zoomFactor());
                 if (focus()->dec().Degrees() < -90.0)
                     focus()->setDec(-90.0);
                 focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             }
 
             arrowKeyPressed = true;
             slewing         = true;
             break;
 
         case Qt::Key_Plus: //Zoom in
         case Qt::Key_Equal:
             zoomInOrMagStep(e->modifiers());
             break;
 
         case Qt::Key_Minus: //Zoom out
         case Qt::Key_Underscore:
             zoomOutOrMagStep(e->modifiers());
             break;
 
         case Qt::Key_0: //center on Sun
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::SUN));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_1: //center on Mercury
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::MERCURY));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_2: //center on Venus
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::VENUS));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_3: //center on Moon
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::MOON));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_4: //center on Mars
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::MARS));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_5: //center on Jupiter
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::JUPITER));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_6: //center on Saturn
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::SATURN));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_7: //center on Uranus
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::URANUS));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         case Qt::Key_8: //center on Neptune
             setClickedObject(data->skyComposite()->planet(KSPlanetBase::NEPTUNE));
             setClickedPoint(clickedObject());
             slotCenter();
             break;
 
         /*case Qt::Key_9: //center on Pluto
             setClickedObject( data->skyComposite()->planet( KSPlanetBase::PLUTO ) );
             setClickedPoint( clickedObject() );
             slotCenter();
             break;*/
 
         case Qt::Key_BracketLeft: // Begin measuring angular distance
             if (!rulerMode)
                 slotBeginAngularDistance();
             break;
         case Qt::Key_Escape: // Cancel angular distance measurement
         {
             if (rulerMode)
                 slotCancelRulerMode();
 
             if (m_fovCaptureMode)
                 slotFinishFovCaptureMode();
             break;
         }
 
         case Qt::Key_C: //Center clicked object
             if (clickedObject())
                 slotCenter();
             break;
 
         case Qt::Key_D: //Details window for Clicked/Centered object
         {
-            SkyObject *orig = 0;
+            SkyObject *orig = nullptr;
             if (shiftPressed)
             {
                 orig = clickedObject();
                 setClickedObject(focusObject());
             }
 
             if (clickedObject())
             {
                 slotDetail();
             }
 
             if (orig)
             {
                 setClickedObject(orig);
             }
             break;
         }
 
         case Qt::Key_P: //Show Popup menu for Clicked/Centered object
             if (shiftPressed)
             {
                 if (focusObject())
                     focusObject()->showPopupMenu(pmenu, QCursor::pos());
             }
             else
             {
                 if (clickedObject())
                     clickedObject()->showPopupMenu(pmenu, QCursor::pos());
             }
             break;
 
         case Qt::Key_O: //Add object to Observing List
         {
-            SkyObject *orig = 0;
+            SkyObject *orig = nullptr;
             if (shiftPressed)
             {
                 orig = clickedObject();
                 setClickedObject(focusObject());
             }
 
             if (clickedObject())
             {
                 data->observingList()->slotAddObject();
             }
 
             if (orig)
             {
                 setClickedObject(orig);
             }
             break;
         }
 
         case Qt::Key_L: //Toggle User label on Clicked/Centered object
         {
-            SkyObject *orig = 0;
+            SkyObject *orig = nullptr;
             if (shiftPressed)
             {
                 orig = clickedObject();
                 setClickedObject(focusObject());
             }
 
             if (clickedObject())
             {
                 if (isObjectLabeled(clickedObject()))
                     slotRemoveObjectLabel();
                 else
                     slotAddObjectLabel();
             }
 
             if (orig)
             {
                 setClickedObject(orig);
             }
             break;
         }
 
         case Qt::Key_T: //Toggle planet trail on Clicked/Centered object (if solsys)
         {
-            SkyObject *orig = 0;
+            SkyObject *orig = nullptr;
             if (shiftPressed)
             {
                 orig = clickedObject();
                 setClickedObject(focusObject());
             }
 
             KSPlanetBase *planet = dynamic_cast<KSPlanetBase *>(clickedObject());
             if (planet)
             {
                 if (planet->hasTrail())
                     slotRemovePlanetTrail();
                 else
                     slotAddPlanetTrail();
             }
 
             if (orig)
             {
                 setClickedObject(orig);
             }
             break;
         }
 
         case Qt::Key_R:
         {
             // Toggle relativistic corrections
             Options::setUseRelativistic(!Options::useRelativistic());
             qDebug() << "Relativistc corrections: " << Options::useRelativistic();
             forceUpdate();
             break;
         }
 
         case Qt::Key_A:
             Options::setUseAntialias(!Options::useAntialias());
             qDebug() << "Use Antialiasing: " << Options::useAntialias();
             forceUpdate();
             break;
 
         case Qt::Key_K:
         {
             if (m_fovCaptureMode)
                 slotCaptureFov();
             break;
         }
 
         case Qt::Key_PageUp:
         {
             KStars::Instance()->selectPreviousFov();
             break;
         }
 
         case Qt::Key_PageDown:
         {
             KStars::Instance()->selectNextFov();
             break;
         }
 
         default:
             // We don't want to do anything in this case. Key is unknown
             return;
     }
 
     if (arrowKeyPressed)
     {
         stopTracking();
         setDestination(*focus());
     }
 
     forceUpdate(); //need a total update, or slewing with the arrow keys doesn't work.
 }
 
 void SkyMap::stopTracking()
 {
     KStars *kstars = KStars::Instance();
     emit positionChanged(focus());
     if (kstars && Options::isTracking())
         kstars->slotTrack();
 }
 
 void SkyMap::keyReleaseEvent(QKeyEvent *e)
 {
     switch (e->key())
     {
         case Qt::Key_Plus: //Zoom in
         case Qt::Key_Equal:
         case Qt::Key_Minus: //Zoom out
         case Qt::Key_Underscore:
 
         case Qt::Key_Left:  //no break; continue to Qt::Key_Down
         case Qt::Key_Right: //no break; continue to Qt::Key_Down
         case Qt::Key_Up:    //no break; continue to Qt::Key_Down
         case Qt::Key_Down:
             slewing = false;
 
             if (Options::useAltAz())
                 setDestinationAltAz(focus()->alt(), focus()->az());
             else
                 setDestination(*focus());
 
             showFocusCoords();
             forceUpdate(); // Need a full update to draw faint objects that are not drawn while slewing.
             break;
     }
 }
 
 void SkyMap::mouseMoveEvent(QMouseEvent *e)
 {
     if (Options::useHoverLabel())
     {
         //Start a single-shot timer to monitor whether we are currently hovering.
         //The idea is that whenever a moveEvent occurs, the timer is reset.  It
         //will only timeout if there are no move events for HOVER_INTERVAL ms
         m_HoverTimer.start(HOVER_INTERVAL);
         QToolTip::hideText();
     }
 
     //Are we defining a ZoomRect?
     if (ZoomRect.center().x() > 0 && ZoomRect.center().y() > 0)
     {
         //cancel operation if the user let go of CTRL
         if (!(e->modifiers() & Qt::ControlModifier))
         {
             ZoomRect = QRect(); //invalidate ZoomRect
             update();
         }
         else
         {
             //Resize the rectangle so that it passes through the cursor position
             QPoint pcenter = ZoomRect.center();
             int dx         = abs(e->x() - pcenter.x());
             int dy         = abs(e->y() - pcenter.y());
             if (dx == 0 || float(dy) / float(dx) > float(height()) / float(width()))
             {
                 //Size rect by height
                 ZoomRect.setHeight(2 * dy);
                 ZoomRect.setWidth(2 * dy * width() / height());
             }
             else
             {
                 //Size rect by height
                 ZoomRect.setWidth(2 * dx);
                 ZoomRect.setHeight(2 * dx * height() / width());
             }
             ZoomRect.moveCenter(pcenter); //reset center
 
             update();
             return;
         }
     }
 
     if (projector()->unusablePoint(e->pos()))
         return; // break if point is unusable
 
     //determine RA, Dec of mouse pointer
     m_MousePoint = projector()->fromScreen(e->pos(), data->lst(), data->geo()->lat());
 
     double dyPix = 0.5 * height() - e->y();
     if (midMouseButtonDown) //zoom according to y-offset
     {
         float yoff = dyPix - y0;
         if (yoff > 10)
         {
             y0 = dyPix;
             slotZoomIn();
         }
         if (yoff < -10)
         {
             y0 = dyPix;
             slotZoomOut();
         }
     }
 
     if (mouseButtonDown)
     {
         // set the mouseMoveCursor and set slewing=true, if they are not set yet
         if (!mouseMoveCursor)
             setMouseMoveCursor();
         if (!slewing)
         {
             slewing = true;
             stopTracking(); //toggle tracking off
         }
 
         //Update focus such that the sky coords at mouse cursor remain approximately constant
         if (Options::useAltAz())
         {
             m_MousePoint.EquatorialToHorizontal(data->lst(), data->geo()->lat());
             clickedPoint()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             dms dAz  = m_MousePoint.az() - clickedPoint()->az();
             dms dAlt = m_MousePoint.alt() - clickedPoint()->alt();
             focus()->setAz(focus()->az().Degrees() - dAz.Degrees()); //move focus in opposite direction
             focus()->setAz(focus()->az().reduce());
             focus()->setAlt(KSUtils::clamp(focus()->alt().Degrees() - dAlt.Degrees(), -90.0, 90.0));
             focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
         }
         else
         {
             dms dRA  = m_MousePoint.ra() - clickedPoint()->ra();
             dms dDec = m_MousePoint.dec() - clickedPoint()->dec();
             focus()->setRA(focus()->ra().Hours() - dRA.Hours()); //move focus in opposite direction
             focus()->setRA(focus()->ra().reduce());
             focus()->setDec(KSUtils::clamp(focus()->dec().Degrees() - dDec.Degrees(), -90.0, 90.0));
             focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
         }
         showFocusCoords();
 
         //redetermine RA, Dec of mouse pointer, using new focus
         m_MousePoint = projector()->fromScreen(e->pos(), data->lst(), data->geo()->lat());
         setClickedPoint(&m_MousePoint);
 
         forceUpdate(); // must be new computed
     }
     else //mouse button not down
     {
         if (Options::useAltAz())
             m_MousePoint.EquatorialToHorizontal(data->lst(), data->geo()->lat());
         emit mousePointChanged(&m_MousePoint);
     }
 }
 
 void SkyMap::wheelEvent(QWheelEvent *e)
 {
     if (e->delta() > 0)
         zoomInOrMagStep(e->modifiers());
     else if (e->delta() < 0)
         zoomOutOrMagStep(e->modifiers());
 }
 
 void SkyMap::mouseReleaseEvent(QMouseEvent *)
 {
     if (ZoomRect.isValid())
     {
         stopTracking();
         SkyPoint newcenter = projector()->fromScreen(ZoomRect.center(), data->lst(), data->geo()->lat());
         setFocus(&newcenter);
         setDestination(newcenter);
 
         //Zoom in on center of Zoom Circle, by a factor equal to the ratio
         //of the sky pixmap's width to the Zoom Circle's diameter
         float factor = float(width()) / float(ZoomRect.width());
         setZoomFactor(Options::zoomFactor() * factor);
     }
     setDefaultMouseCursor();
     ZoomRect = QRect(); //invalidate ZoomRect
 
     if (m_previewLegend)
     {
         slotCancelLegendPreviewMode();
     }
 
     //false if double-clicked, because it's unset there.
     if (mouseButtonDown)
     {
         mouseButtonDown = false;
         if (slewing)
         {
             slewing = false;
             if (Options::useAltAz())
                 setDestinationAltAz(focus()->alt(), focus()->az());
             else
                 setDestination(*focus());
         }
         forceUpdate(); // is needed because after moving the sky not all stars are shown
     }
     // if middle button was pressed unset here
     midMouseButtonDown = false;
 }
 
 void SkyMap::mousePressEvent(QMouseEvent *e)
 {
     KStars *kstars = KStars::Instance();
 
     if ((e->modifiers() & Qt::ControlModifier) && (e->button() == Qt::LeftButton))
     {
         ZoomRect.moveCenter(e->pos());
         setZoomMouseCursor();
         update(); //refresh without redrawing skymap
         return;
     }
 
     // if button is down and cursor is not moved set the move cursor after 500 ms
     QTimer::singleShot(500, this, SLOT(setMouseMoveCursor()));
 
     // break if point is unusable
     if (projector()->unusablePoint(e->pos()))
         return;
 
     if (!midMouseButtonDown && e->button() == Qt::MidButton)
     {
         y0                 = 0.5 * height() - e->y(); //record y pixel coordinate for middle-button zooming
         midMouseButtonDown = true;
     }
 
     if (!mouseButtonDown)
     {
         if (e->button() == Qt::LeftButton)
         {
             mouseButtonDown = true;
         }
 
         //determine RA, Dec of mouse pointer
         m_MousePoint = projector()->fromScreen(e->pos(), data->lst(), data->geo()->lat());
         setClickedPoint(&m_MousePoint);
 
         //Find object nearest to clickedPoint()
         double maxrad  = 1000.0 / Options::zoomFactor();
         SkyObject *obj = data->skyComposite()->objectNearest(clickedPoint(), maxrad);
         setClickedObject(obj);
         if (obj)
             setClickedPoint(obj);
 
         switch (e->button())
         {
             case Qt::LeftButton:
             {
                 QString name;
                 if (clickedObject())
                 {
                     name = clickedObject()->translatedLongName();
                     emit objectClicked(clickedObject());
                 }
                 else
                     name = i18n("Empty sky");
                 //kstars->statusBar()->changeItem(name, 0 );
                 kstars->statusBar()->showMessage(name, 0);
 
                 emit positionClicked(&m_MousePoint);
             }
 
             break;
             case Qt::RightButton:
                 if (rulerMode)
                 {
                     // Compute angular distance.
                     slotEndRulerMode();
                 }
                 else
                 {
                     // Show popup menu
                     if (clickedObject())
                     {
                         clickedObject()->showPopupMenu(pmenu, QCursor::pos());
                     }
                     else
                     {
                         pmenu->createEmptyMenu(clickedPoint());
                         pmenu->popup(QCursor::pos());
                     }
                 }
                 break;
             default:;
         }
     }
 }
 
 void SkyMap::mouseDoubleClickEvent(QMouseEvent *e)
 {
     if (e->button() == Qt::LeftButton && !projector()->unusablePoint(e->pos()))
     {
         mouseButtonDown = false;
         if (e->x() != width() / 2 || e->y() != height() / 2)
             slotCenter();
     }
 }
 
 double SkyMap::zoomFactor(const int modifier)
 {
     double factor = (modifier & Qt::ControlModifier) ? DZOOM : (Options::zoomScrollFactor() + 1);
     if (modifier & Qt::ShiftModifier)
         factor = sqrt(factor);
     return factor;
 }
 
 void SkyMap::zoomInOrMagStep(const int modifier)
 {
     if (modifier & Qt::AltModifier)
         incMagLimit(modifier);
     else
         setZoomFactor(Options::zoomFactor() * zoomFactor(modifier));
 }
 
 void SkyMap::zoomOutOrMagStep(const int modifier)
 {
     if (modifier & Qt::AltModifier)
         decMagLimit(modifier);
     else
         setZoomFactor(Options::zoomFactor() / zoomFactor(modifier));
 }
 
 double SkyMap::magFactor(const int modifier)
 {
     double factor = (modifier & Qt::ControlModifier) ? 0.1 : 0.5;
     if (modifier & Qt::ShiftModifier)
         factor *= 2.0;
     return factor;
 }
 
 void SkyMap::incMagLimit(const int modifier)
 {
     double limit = 2.222 * log10(static_cast<double>(Options::starDensity())) + 0.35;
     limit += magFactor(modifier);
     if (limit > 5.75954)
         limit = 5.75954;
     Options::setStarDensity(pow(10, (limit - 0.35) / 2.222));
     //printf("maglim set to %3.1f\n", limit);
     forceUpdate();
 }
 
 void SkyMap::decMagLimit(const int modifier)
 {
     double limit = 2.222 * log10(static_cast<double>(Options::starDensity())) + 0.35;
     limit -= magFactor(modifier);
     if (limit < 1.18778)
         limit = 1.18778;
     Options::setStarDensity(pow(10, (limit - 0.35) / 2.222));
     //printf("maglim set to %3.1f\n", limit);
     forceUpdate();
 }
diff --git a/kstars/skyobjects/ksplanetbase.cpp b/kstars/skyobjects/ksplanetbase.cpp
index 5fc3724b7..60dfa77a2 100644
--- a/kstars/skyobjects/ksplanetbase.cpp
+++ b/kstars/skyobjects/ksplanetbase.cpp
@@ -1,309 +1,309 @@
 /***************************************************************************
                           ksplanetbase.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Jul 22 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "ksplanetbase.h"
 
 #include "ksnumbers.h"
 #include "kstarsdata.h"
 #include "ksutils.h"
 #include "Options.h"
 #include "skymap.h"
 #include "ksasteroid.h"
 #include "kscomet.h"
 #include "ksmoon.h"
 #include "ksplanet.h"
 #include "kssun.h"
 #include "texturemanager.h"
 #include "skycomponents/skymapcomposite.h"
 
 QVector<QColor> KSPlanetBase::planetColor = QVector<QColor>() << QColor("slateblue") << //Mercury
                                             QColor("lightgreen") <<                     //Venus
                                             QColor("red") <<                            //Mars
                                             QColor("goldenrod") <<                      //Jupiter
                                             QColor("khaki") <<                          //Saturn
                                             QColor("lightseagreen") <<                  //Uranus
                                             QColor("skyblue") <<                        //Neptune
                                             QColor("grey") <<                           //Pluto
                                             QColor("yellow") <<                         //Sun
                                             QColor("white");                            //Moon
 
 const SkyObject::UID KSPlanetBase::UID_SOL_BIGOBJ   = 0;
 const SkyObject::UID KSPlanetBase::UID_SOL_ASTEROID = 1;
 const SkyObject::UID KSPlanetBase::UID_SOL_COMET    = 2;
 
 KSPlanetBase::KSPlanetBase(const QString &s, const QString &image_file, const QColor &c, double pSize)
     : TrailObject(2, 0.0, 0.0, 0.0, s), Rearth(NaN::d)
 {
     init(s, image_file, c, pSize);
 }
 
 void KSPlanetBase::init(const QString &s, const QString &image_file, const QColor &c, double pSize)
 {
     m_image       = TextureManager::getImage(image_file);
     PositionAngle = 0.0;
     PhysicalSize  = pSize;
     m_Color       = c;
     setName(s);
     setLongName(s);
 }
 
 KSPlanetBase *KSPlanetBase::createPlanet(int n)
 {
     switch (n)
     {
         case KSPlanetBase::MERCURY:
         case KSPlanetBase::VENUS:
         case KSPlanetBase::MARS:
         case KSPlanetBase::JUPITER:
         case KSPlanetBase::SATURN:
         case KSPlanetBase::URANUS:
         case KSPlanetBase::NEPTUNE:
             return new KSPlanet(n);
             break;
         /*case KSPlanetBase::PLUTO:
             return new KSPluto();
             break;*/
         case KSPlanetBase::SUN:
             return new KSSun();
             break;
         case KSPlanetBase::MOON:
             return new KSMoon();
             break;
     }
-    return 0;
+    return nullptr;
 }
 
 void KSPlanetBase::EquatorialToEcliptic(const CachingDms *Obliquity)
 {
     findEcliptic(Obliquity, ep.longitude, ep.latitude);
 }
 
 void KSPlanetBase::EclipticToEquatorial(const CachingDms *Obliquity)
 {
     setFromEcliptic(Obliquity, ep.longitude, ep.latitude);
 }
 
 void KSPlanetBase::updateCoords(const KSNumbers *num, bool includePlanets, const CachingDms *lat, const CachingDms *LST,
                                 bool)
 {
     KStarsData *kd = KStarsData::Instance();
 
     if (kd == nullptr || !includePlanets)
         return;
 
     kd->skyComposite()->earth()->findPosition(num); //since we don't pass lat & LST, localizeCoords will be skipped
 
     if (lat && LST)
     {
         findPosition(num, lat, LST, kd->skyComposite()->earth());
         // Don't add to the trail this time
         if (hasTrail())
             Trail.takeLast();
     }
     else
     {
         findGeocentricPosition(num, kd->skyComposite()->earth());
     }
 }
 
 void KSPlanetBase::findPosition(const KSNumbers *num, const CachingDms *lat, const CachingDms *LST,
                                 const KSPlanetBase *Earth)
 {
     // DEBUG edit
     findGeocentricPosition(num, Earth); //private function, reimplemented in each subclass
     findPhase();
     setAngularSize(asin(physicalSize() / Rearth / AU_KM) * 60. * 180. / dms::PI); //angular size in arcmin
 
     if (lat && LST)
         localizeCoords(num, lat, LST); //correct for figure-of-the-Earth
 
     if (hasTrail())
     {
         addToTrail(KStarsDateTime(num->getJD()).toString("yyyy.MM.dd hh:mm") +
                    i18nc("Universal time", "UT")); // TODO: Localize date/time format?
         if (Trail.size() > TrailObject::MaxTrail)
             clipTrail();
     }
 
     findMagnitude(num);
 
     if (type() == SkyObject::COMET)
     {
         // Compute tail size
         KSComet *me = (KSComet *)this;
         double comaAngSize;
         // Convert the tail size in km to angular tail size (degrees)
         comaAngSize = asin(physicalSize() / Rearth / AU_KM) * 60.0 * 180.0 / dms::PI;
         // Find the apparent length as projected on the celestial sphere (the comet's tail points away from the sun)
         me->setComaAngSize(comaAngSize * fabs(sin(phase().radians())));
     }
 }
 
 bool KSPlanetBase::isMajorPlanet() const
 {
     if (name() == i18n("Mercury") || name() == i18n("Venus") || name() == i18n("Mars") || name() == i18n("Jupiter") ||
         name() == i18n("Saturn") || name() == i18n("Uranus") || name() == i18n("Neptune"))
         return true;
     return false;
 }
 
 void KSPlanetBase::localizeCoords(const KSNumbers *num, const CachingDms *lat, const CachingDms *LST)
 {
     //convert geocentric coordinates to local apparent coordinates (topocentric coordinates)
     dms HA, HA2; //Hour Angle, before and after correction
     double rsinp, rcosp, u, sinHA, cosHA, sinDec, cosDec, D;
     double cosHA2;
     double r = Rearth * AU_KM; //distance from Earth, in km
     u        = atan(0.996647 * tan(lat->radians()));
     rsinp    = 0.996647 * sin(u);
     rcosp    = cos(u);
     HA.setD(LST->Degrees() - ra().Degrees());
     HA.SinCos(sinHA, cosHA);
     dec().SinCos(sinDec, cosDec);
 
     D = atan2(rcosp * sinHA, r * cosDec / 6378.14 - rcosp * cosHA);
     dms temp;
     temp.setRadians(ra().radians() - D);
     setRA(temp);
 
     HA2.setD(LST->Degrees() - ra().Degrees());
     cosHA2 = cos(HA2.radians());
 
     //temp.setRadians( atan2( cosHA2*( r*sinDec/6378.14 - rsinp ), r*cosDec*cosHA/6378.14 - rcosp ) );
     // The atan2() version above makes the planets move crazy in the htm branch -jbb
     temp.setRadians(atan(cosHA2 * (r * sinDec / 6378.14 - rsinp) / (r * cosDec * cosHA / 6378.14 - rcosp)));
 
     setDec(temp);
 
     //Make sure Dec is between -90 and +90
     if (dec().Degrees() > 90.0)
     {
         setDec(180.0 - dec().Degrees());
         setRA(ra().Hours() + 12.0);
         ra().reduce();
     }
     if (dec().Degrees() < -90.0)
     {
         setDec(180.0 + dec().Degrees());
         setRA(ra().Hours() + 12.0);
         ra().reduce();
     }
 
     EquatorialToEcliptic(num->obliquity());
 }
 
 void KSPlanetBase::setRearth(const KSPlanetBase *Earth)
 {
     double sinL, sinB, sinL0, sinB0;
     double cosL, cosB, cosL0, cosB0;
     double x, y, z;
 
     //The Moon's Rearth is set in its findGeocentricPosition()...
     if (name() == "Moon")
     {
         return;
     }
 
     if (name() == "Earth")
     {
         Rearth = 0.0;
         return;
     }
 
     if (!Earth)
     {
         qDebug() << "KSPlanetBase::setRearth():  Error: Need an Earth pointer.  (" << name() << ")";
         Rearth = 1.0;
         return;
     }
 
     Earth->ecLong().SinCos(sinL0, cosL0);
     Earth->ecLat().SinCos(sinB0, cosB0);
     double eX = Earth->rsun() * cosB0 * cosL0;
     double eY = Earth->rsun() * cosB0 * sinL0;
     double eZ = Earth->rsun() * sinB0;
 
     helEcLong().SinCos(sinL, cosL);
     helEcLat().SinCos(sinB, cosB);
     x = rsun() * cosB * cosL - eX;
     y = rsun() * cosB * sinL - eY;
     z = rsun() * sinB - eZ;
 
     Rearth = sqrt(x * x + y * y + z * z);
 
     //Set angular size, in arcmin
     AngularSize = asin(PhysicalSize / Rearth / AU_KM) * 60. * 180. / dms::PI;
 }
 
 void KSPlanetBase::findPA(const KSNumbers *num)
 {
     //Determine position angle of planet (assuming that it is aligned with
     //the Ecliptic, which is only roughly correct).
     //Displace a point along +Ecliptic Latitude by 1 degree
     SkyPoint test;
     dms newELat(ecLat().Degrees() + 1.0);
     test.setFromEcliptic(num->obliquity(), ecLong(), newELat);
     double dx = ra().Degrees() - test.ra().Degrees();
     double dy = test.dec().Degrees() - dec().Degrees();
     double pa;
     if (dy)
     {
         pa = atan2(dx, dy) * 180.0 / dms::PI;
     }
     else
     {
         pa = dx < 0 ? 90.0 : -90.0;
     }
     setPA(pa);
 }
 
 double KSPlanetBase::labelOffset() const
 {
     double size = angSize() * dms::PI * Options::zoomFactor() / 10800.0;
 
     //Determine minimum size for offset
     double minsize = 4.;
     if (type() == SkyObject::ASTEROID || type() == SkyObject::COMET)
         minsize = 2.;
     if (name() == "Sun" || name() == "Moon")
         minsize = 8.;
     if (size < minsize)
         size = minsize;
 
     //Inflate offset for Saturn
     if (name() == i18n("Saturn"))
         size = int(2.5 * size);
 
     return 0.5 * size + 4.;
 }
 
 void KSPlanetBase::findPhase()
 {
     if (2*rsun()*rearth() == 0)
     {
         Phase = std::numeric_limits<double>::quiet_NaN();
         return;
     }
     /* Compute the phase of the planet in degrees */
     double earthSun = KStarsData::Instance()->skyComposite()->earth()->rsun();
     double cosPhase = (rsun() * rsun() + rearth() * rearth() - earthSun * earthSun) / (2 * rsun() * rearth());
 
     Phase           = acos(cosPhase) * 180.0 / dms::PI;
     /* More elegant way of doing it, but requires the Sun.
        TODO: Switch to this if and when we make KSSun a singleton */
     //    Phase = ecLong()->Degrees() - Sun->ecLong()->Degrees();
 }
diff --git a/kstars/skyobjects/ksplanetbase.h b/kstars/skyobjects/ksplanetbase.h
index 6c2badbf1..b54fbea91 100644
--- a/kstars/skyobjects/ksplanetbase.h
+++ b/kstars/skyobjects/ksplanetbase.h
@@ -1,284 +1,284 @@
 /***************************************************************************
                           ksplanetbase.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Jan 29 2002
     copyright            : (C) 2002 by Mark Hollomon
     email                : mhh@mindspring.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "trailobject.h"
 
 #include <QColor>
 #include <QDebug>
 #include <QImage>
 #include <QList>
 
 class KSNumbers;
 
 /**
  * @class EclipticPosition
  * @short The ecliptic position of a planet (Longitude, Latitude, and distance from Sun).
  * @author Mark Hollomon
  * @version 1.0
  */
 class EclipticPosition
 {
   public:
     dms longitude;
     dms latitude;
     double radius;
 
     /**Constructor. */
     explicit EclipticPosition(dms plong = dms(), dms plat = dms(), double prad = 0.0)
         : longitude(plong), latitude(plat), radius(prad)
     {
     }
 };
 
 /**
  * @class KSPlanetBase
  * A subclass of TrailObject that provides additional information needed for most solar system
  * objects. This is a base class for KSSun, KSMoon, KSPlanet, KSAsteroid and KSComet.
  * Those classes cover all solar system objects except planetary moons, which are
  * derived directly from TrailObject
  * @short Provides necessary information about objects in the solar system.
  * @author Mark Hollomon
  * @version 1.0
  */
 class KSPlanetBase : public TrailObject
 {
   public:
     /**
      * Constructor.  Calls SkyObject constructor with type=2 (planet),
      * coordinates=0.0, mag=0.0, primary name s, and all other QStrings empty.
      * @param s Name of planet
      * @param image_file filename of the planet's image
      * @param c color of the symbol to use for this planet
      * @param pSize the planet's physical size, in km
      */
     explicit KSPlanetBase(const QString &s = i18n("unnamed"), const QString &image_file = QString(),
                           const QColor &c = Qt::white, double pSize = 0);
 
     /** Destructor (empty) */
     ~KSPlanetBase() override {}
 
     void init(const QString &s, const QString &image_file, const QColor &c, double pSize);
 
     //enum Planets { MERCURY=0, VENUS=1, MARS=2, JUPITER=3, SATURN=4, URANUS=5, NEPTUNE=6, PLUTO=7, SUN=8, MOON=9, UNKNOWN_PLANET };
     enum Planets
     {
         MERCURY = 0,
         VENUS   = 1,
         MARS    = 2,
         JUPITER = 3,
         SATURN  = 4,
         URANUS  = 5,
         NEPTUNE = 6,
         SUN     = 7,
         MOON    = 8,
         UNKNOWN_PLANET
     };
 
     static KSPlanetBase *createPlanet(int n);
 
     static QVector<QColor> planetColor;
 
     virtual bool loadData() = 0;
 
     /** @return pointer to Ecliptic Longitude coordinate */
     const dms &ecLong() const { return ep.longitude; }
 
     /** @return pointer to Ecliptic Latitude coordinate */
     const dms &ecLat() const { return ep.latitude; }
 
     /**
      * @short Set Ecliptic Geocentric Longitude according to argument.
      * @param elong Ecliptic Longitude
      */
     void setEcLong(dms elong) { ep.longitude = elong; }
 
     /**
      * @short Set Ecliptic Geocentric Latitude according to argument.
      * @param elat Ecliptic Latitude
      */
     void setEcLat(dms elat) { ep.latitude = elat; }
 
     /** @return pointer to Ecliptic Heliocentric Longitude coordinate */
     const dms &helEcLong() const { return helEcPos.longitude; }
 
     /** @return pointer to Ecliptic Heliocentric Latitude coordinate */
     const dms &helEcLat() const { return helEcPos.latitude; }
 
     /**
      * @short Convert Ecliptic logitude/latitude to Right Ascension/Declination.
      * @param Obliquity current Obliquity of the Ecliptic (angle from Equator)
      */
     void EclipticToEquatorial(const CachingDms *Obliquity);
 
     /**
      * @short Convert Right Ascension/Declination to Ecliptic logitude/latitude.
      * @param Obliquity current Obliquity of the Ecliptic (angle from Equator)
      */
     void EquatorialToEcliptic(const CachingDms *Obliquity);
 
     /** @return pointer to this planet's texture */
     const QImage &image() const { return m_image; }
 
     /** @return distance from Sun, in Astronomical Units (1 AU is Earth-Sun distance) */
     double rsun() const { return ep.radius; }
 
     /**
      * @short Set the solar distance in AU.
      * @param r the new solar distance in AU
      */
     void setRsun(double r) { ep.radius = r; }
 
     /** @return distance from Earth, in Astronomical Units (1 AU is Earth-Sun distance) */
     double rearth() const { return Rearth; }
 
     /**
      * @short Set the distance from Earth, in AU.
      * @param r the new earth-distance in AU
      */
     void setRearth(double r) { Rearth = r; }
 
     /**
      * @short compute and set the distance from Earth, in AU.
      * @param Earth pointer to the Earth from which to calculate the distance.
      */
     void setRearth(const KSPlanetBase *Earth);
 
     /**
      * Update position of the planet (reimplemented from SkyPoint)
      * @param num current KSNumbers object
      * @param includePlanets this function does nothing if includePlanets=false
      * @param lat pointer to the geographic latitude; if nullptr, we skip localizeCoords()
      * @param LST pointer to the local sidereal time; if nullptr, we skip localizeCoords()
      */
-    void updateCoords(const KSNumbers *num, bool includePlanets = true, const CachingDms *lat = 0,
-                      const CachingDms *LST = 0, bool forceRecompute = false) override;
+    void updateCoords(const KSNumbers *num, bool includePlanets = true, const CachingDms *lat = nullptr,
+                      const CachingDms *LST = nullptr, bool forceRecompute = false) override;
 
     /**
      * @short Find position, including correction for Figure-of-the-Earth.
      * @param num KSNumbers pointer for the target date/time
      * @param lat pointer to the geographic latitude; if nullptr, we skip localizeCoords()
      * @param LST pointer to the local sidereal time; if nullptr, we skip localizeCoords()
      * @param Earth pointer to the Earth (not used for the Moon)
      */
-    void findPosition(const KSNumbers *num, const CachingDms *lat = 0, const CachingDms *LST = 0,
-                      const KSPlanetBase *Earth = 0);
+    void findPosition(const KSNumbers *num, const CachingDms *lat = nullptr, const CachingDms *LST = nullptr,
+                      const KSPlanetBase *Earth = nullptr);
 
     /** @return the Planet's position angle. */
     double pa() const override { return PositionAngle; }
 
     /**
      * @short Set the Planet's position angle.
      * @param p the new position angle
      */
     void setPA(double p) { PositionAngle = p; }
 
     /** @return the Planet's angular size, in arcminutes */
     double angSize() const { return AngularSize; }
 
     /** @short set the planet's angular size, in km.
          * @param size the planet's size, in km
          */
     void setAngularSize(double size) { AngularSize = size; }
 
     /** @return the Planet's physical size, in km */
     double physicalSize() const { return PhysicalSize; }
 
     /** @short set the planet's physical size, in km.
          * @param size the planet's size, in km
          */
     void setPhysicalSize(double size) { PhysicalSize = size; }
 
     /** @return the phase angle of this planet */
     inline dms phase() { return dms(Phase); }
 
     /** @return the color for the planet symbol */
     QColor &color() { return m_Color; }
 
     /** @short Set the color for the planet symbol */
     void setColor(const QColor &c) { m_Color = c; }
 
     /** @return true if the KSPlanet is one of the eight major planets */
     bool isMajorPlanet() const;
 
     /** @return the pixel distance for offseting the object's name label */
     double labelOffset() const override;
 
   protected:
     /** Big object. Planet, Moon, Sun. */
     static const UID UID_SOL_BIGOBJ;
     /** Asteroids */
     static const UID UID_SOL_ASTEROID;
     /** Comets */
     static const UID UID_SOL_COMET;
 
     /** Compute high 32-bits of UID. */
     inline UID solarsysUID(UID type) const { return (SkyObject::UID_SOLARSYS << 60) | (type << 56); }
 
     /**
      * @short find the object's current geocentric equatorial coordinates (RA and Dec)
      * This function is pure virtual; it must be overloaded by subclasses.
      * This function is private; it is called by the public function findPosition()
      * which also includes the figure-of-the-earth correction, localizeCoords().
      * @param num pointer to current KSNumbers object
      * @param Earth pointer to planet Earth (needed to calculate geocentric coords)
      * @return true if position was successfully calculated.
      */
     virtual bool findGeocentricPosition(const KSNumbers *num, const KSPlanetBase *Earth = nullptr) = 0;
 
     /**
      * @short Computes the visual magnitude for the major planets.
      * @param num pointer to a ksnumbers object. Needed for the saturn rings contribution to
      * saturn's magnitude.
      */
     virtual void findMagnitude(const KSNumbers *num) = 0;
 
     /**
      * Determine the position angle of the planet for a given date
      * (used internally by findPosition() )
      */
     void findPA(const KSNumbers *num);
 
     /** Determine the phase of the planet. */
     virtual void findPhase();
 
     // Geocentric ecliptic position, but distance to the Sun
     EclipticPosition ep;
 
     // Heliocentric ecliptic position referred to the equinox of the epoch
     // as obtained from VSOP.
     EclipticPosition helEcPos;
     double Rearth;
     double Phase;
     QImage m_image;
 
   private:
     /**
      * @short correct the position for the fact that the location is not at the center of the Earth,
      * but a position on its surface.  This causes a small parallactic shift in a solar system
      * body's apparent position.  The effect is most significant for the Moon.
      * This function is private, and should only be called from the public findPosition() function.
      * @param num pointer to a ksnumbers object for the target date/time
      * @param lat pointer to the geographic latitude of the location.
      * @param LST pointer to the local sidereal time.
      */
     void localizeCoords(const KSNumbers *num, const CachingDms *lat, const CachingDms *LST);
 
     double PositionAngle, AngularSize, PhysicalSize;
     QColor m_Color;
 };
diff --git a/kstars/skyobjects/skyline.h b/kstars/skyobjects/skyline.h
index 099ecd0cf..22bb98b65 100644
--- a/kstars/skyobjects/skyline.h
+++ b/kstars/skyobjects/skyline.h
@@ -1,80 +1,80 @@
 /***************************************************************************
                           skyline.h  -  K Desktop Planetarium
                              -------------------
     begin                : Mon June 26 2006
     copyright            : (C) 2006 by Jason Harris
     email                : kstarss@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef SKYLINE_H_
 #define SKYLINE_H_
 
 #include "skypoint.h"
 
 class dms;
 class KStarsData;
 
 /**
  * @class SkyLine
  *
  * A series of connected line segments in the sky, composed of SkyPoints at
  * its vertices.  SkyLines are used for constellation lines and boundaries,
  * the coordinate grid, and the equator, ecliptic and horizon.
  *
  * @note the SkyLine segments are always straight lines, they are not
  * Great Circle segments joining the two endpoints.  Therefore, line segments
  * that need to follow great circles must be approximated with many short
  * SkyLine segments.
  */
 class SkyLine
 {
   public:
     /** Default Constructor (empty). */
     SkyLine();
 
     /** Destructor */
     ~SkyLine();
 
     /**Append a segment to the list by adding a new endpoint.
          * @param p the new endpoint to be added
          */
     void append(SkyPoint *p);
 
     /** @return a const pointer to a point in the SkyLine
          * param i the index position of the point
          */
     inline SkyPoint *point(int i) const { return m_pList[i]; }
 
     inline QList<SkyPoint *> &points() { return m_pList; }
 
     /** Remove all points from list */
     void clear();
 
     /**Set point i in the SkyLine
          * @param i the index position of the point to modify
          * @param p1 the new SkyPoint
          */
     void setPoint(int i, SkyPoint *p);
 
     /** @return the angle subtended by any line segment along the SkyLine.
          * @param i the index of the line segment to be measured.
          * If no argument is given, the first segment is assumed.
          */
     dms angularSize(int i = 0) const;
 
-    void update(KStarsData *data, KSNumbers *num = 0);
+    void update(KStarsData *data, KSNumbers *num = nullptr);
 
   private:
     QList<SkyPoint *> m_pList;
 };
 
 #endif
diff --git a/kstars/skyobjects/skyobject.h b/kstars/skyobjects/skyobject.h
index c4c3a8ea5..a4779364f 100644
--- a/kstars/skyobjects/skyobject.h
+++ b/kstars/skyobjects/skyobject.h
@@ -1,477 +1,477 @@
 /***************************************************************************
                           skyobject.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 11 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "auxinfo.h"
 #include "dms.h"
 #include "skypoint.h"
 
 #include <KLocalizedString>
 
 #include <QSharedDataPointer>
 #include <QString>
 #include <QStringList>
 
 class QPoint;
 class GeoLocation;
 class KStarsDateTime;
 class KSPopupMenu;
 
 /**
  * @class SkyObject
  * Provides all necessary information about an object in the sky:
  * its coordinates, name(s), type, magnitude, and QStringLists of
  * URLs for images and webpages regarding the object.
  * @short Information about an object in the sky.
  * @author Jason Harris
  * @version 1.0
  */
 class SkyObject : public SkyPoint
 {
   public:
     /**
      * @short Type for Unique object IDenticator.
      *
      * Each object has unique ID (UID). For different objects UIDs must be different.
      */
     typedef qint64 UID;
 
     /** @short Kind of UID */
     static const UID UID_STAR;
     static const UID UID_GALAXY;
     static const UID UID_DEEPSKY;
     static const UID UID_SOLARSYS;
 
     /** Invalid UID. Real sky object could not have such UID */
     static const UID invalidUID;
 
     /**
      * Constructor.  Set SkyObject data according to arguments.
      * @param t Type of object
      * @param r catalog Right Ascension
      * @param d catalog Declination
      * @param m magnitude (brightness)
      * @param n Primary name
      * @param n2 Secondary name
      * @param lname Long name (common name)
      */
     explicit SkyObject(int t = TYPE_UNKNOWN, dms r = dms(0.0), dms d = dms(0.0), float m = 0.0,
                        const QString &n = QString(), const QString &n2 = QString(), const QString &lname = QString());
     /**
      * Constructor. Set SkyObject data according to arguments. Differs from
      * above function only in data type of RA and Dec.
      * @param t Type of object
      * @param r catalog Right Ascension
      * @param d catalog Declination
      * @param m magnitude (brightness)
      * @param n Primary name
      * @param n2 Secondary name
      * @param lname Long name (common name)
      */
     SkyObject(int t, double r, double d, float m = 0.0, const QString &n = QString(), const QString &n2 = QString(),
               const QString &lname = QString());
 
     /** Destructor (empty) */
     ~SkyObject() override;
 
     /**
      * @short Create copy of object.
      * This method is virtual copy constructor. It allows for safe
      * copying of objects. In other words, KSPlanet object stored in
      * SkyObject pointer will be copied as KSPlanet.
      *
      * Each subclass of SkyObject MUST implement clone method. There
      * is no checking to ensure this, though.
      *
      *  @return pointer to newly allocated object. Caller takes full responsibility
      *  for deallocating it.
      */
     virtual SkyObject *clone() const;
 
     /**
      * @enum TYPE
      * The type classification of the SkyObject.
      * @note Keep TYPE_UNKNOWN at 255. To find out how many known
      * types exist, keep the NUMBER_OF_KNOWN_TYPES at the highest
      * non-Unknown value. This is a fake type that can be used in
      * comparisons and for loops.
      */
     enum TYPE
     {
         STAR                  = 0,
         CATALOG_STAR          = 1,
         PLANET                = 2,
         OPEN_CLUSTER          = 3,
         GLOBULAR_CLUSTER      = 4,
         GASEOUS_NEBULA        = 5,
         PLANETARY_NEBULA      = 6,
         SUPERNOVA_REMNANT     = 7,
         GALAXY                = 8,
         COMET                 = 9,
         ASTEROID              = 10,
         CONSTELLATION         = 11,
         MOON                  = 12,
         ASTERISM              = 13,
         GALAXY_CLUSTER        = 14,
         DARK_NEBULA           = 15,
         QUASAR                = 16,
         MULT_STAR             = 17,
         RADIO_SOURCE          = 18,
         SATELLITE             = 19,
         SUPERNOVA             = 20,
         NUMBER_OF_KNOWN_TYPES = 21,
         TYPE_UNKNOWN          = 255
     };
     /**
      * @return A translated string indicating the type name for a given type number
      * @param t The type number
      * @note Note the existence of a SkyObject::typeName( void ) method that is not static and returns the type of this object.
      */
     static QString typeName(const int t);
 
     /** @return object's primary name. */
     inline virtual QString name(void) const { return hasName() ? Name : unnamedString; }
 
     /** @return object's primary name, translated to local language. */
     inline QString translatedName() const
     {
         return i18n(
             name()
                 .toUtf8()); // FIXME: Hmm... that's funny. How does the string extraction work, if we are UTF8-ing the name first? Does the string extraction change to UTF8?
     }
 
     /** @return object's secondary name */
     inline QString name2(void) const { return (hasName2() ? Name2 : emptyString); }
 
     /** @return object's secondary name, translated to local language. */
     inline QString translatedName2() const { return (hasName2() ? i18n(Name2.toUtf8()) : emptyString); }
 
     /**
      * @return object's common (long) name
      */
     virtual QString longname(void) const { return hasLongName() ? LongName : unnamedObjectString; }
 
     /**
      * @return object's common (long) name, translated to local language.
      */
     QString translatedLongName() const { return i18n(longname().toUtf8()); }
 
     /**
      * Set the object's long name.
      * @param longname the object's long name.
      */
     void setLongName(const QString &longname = QString());
 
     /**
      * @return the string used to label the object on the map
      * In the default implementation, this just returns translatedName()
      * Overridden by StarObject.
      */
     virtual QString labelString() const;
 
     /**
      * @return object's type identifier (int)
      * @see enum TYPE
      */
     inline int type(void) const { return (int)Type; }
 
     /**
      * Set the object's type identifier to the argument.
      * @param t the object's type identifier (e.g., "SkyObject::PLANETARY_NEBULA")
      * @see enum TYPE
      */
     inline void setType(int t) { Type = (unsigned char)t; }
 
     /**
      * @return the type name for this object
      * @note This just calls the static method by the same name, with the appropriate type number. See SkyObject::typeName( const int )
      */
     QString typeName() const;
 
     /**
      * @return object's magnitude
      */
     inline float mag() const { return sortMagnitude; }
 
     /**
      * @return the object's position angle.  This is overridden in KSPlanetBase
      * and DeepSkyObject; for all other SkyObjects, this returns 0.0.
      */
     inline virtual double pa() const { return 0.0; }
 
     /**
      * @return true if the object is a solar system body.
      */
     inline bool isSolarSystem() const { return (type() == 2 || type() == 9 || type() == 10 || type() == 12); }
 
     /**
      * Initialize the popup menut. This function should call correct
      * initialization function in KSPopupMenu. By overloading the
      * function, we don't have to check the object type when we need
      * the menu.
      */
     virtual void initPopupMenu(KSPopupMenu *pmenu);
 
     /** Show Type-specific popup menu. Oveloading is done in the function initPopupMenu */
     void showPopupMenu(KSPopupMenu *pmenu, const QPoint &pos);
 
     /**
      * Determine the time at which the point will rise or set.  Because solar system
      * objects move across the sky, it is necessary to iterate on the solution.
      * We compute the rise/set time for the object's current position, then
      * compute the object's position at that time.  Finally, we recompute then
      * rise/set time for the new coordinates.  Further iteration is not necessary,
      * even for the most swiftly-moving object (the Moon).
      * @return the local time that the object will rise
      * @param dt current UT date/time
      * @param geo current geographic location
      * @param rst If true, compute rise time. If false, compute set time.
      * @param exact If true, use a second iteration for more accurate time
      */
     QTime riseSetTime(const KStarsDateTime &dt, const GeoLocation *geo, bool rst, bool exact = true) const;
 
     /**
      * @return the UT time when the object will rise or set
      * @param dt  target date/time
      * @param geo pointer to Geographic location
      * @param rst Boolean. If true will compute rise time. If false
      * will compute set time.
      * @param exact If true, use a second iteration for more accurate time
      */
     QTime riseSetTimeUT(const KStarsDateTime &dt, const GeoLocation *geo, bool rst, bool exact = true) const;
 
     /**
      * @return the Azimuth time when the object will rise or set. This function
      * recomputes set or rise UT times.
      * @param dt  target date/time
      * @param geo GeoLocation object
      * @param rst Boolen. If true will compute rise time. If false
      * will compute set time.
      */
     dms riseSetTimeAz(const KStarsDateTime &dt, const GeoLocation *geo, bool rst) const;
 
     /**
      * The same iteration technique described in riseSetTime() is used here.
      * @return the local time that the object will transit the meridian.
      * @param dt  target date/time
      * @param geo pointer to the geographic location
      */
     QTime transitTime(const KStarsDateTime &dt, const GeoLocation *geo) const;
 
     /**
      * @return the universal time that the object will transit the meridian.
      * @param dt   target date/time
      * @param geo pointer to the geographic location
      */
     QTime transitTimeUT(const KStarsDateTime &dt, const GeoLocation *geo) const;
 
     /**
      * @return the altitude of the object at the moment it transits the meridian.
      * @param dt  target date/time
      * @param geo pointer to the geographic location
      */
     dms transitAltitude(const KStarsDateTime &dt, const GeoLocation *geo) const;
 
     /**
      * The equatorial coordinates for the object on date dt are computed and returned,
      * but the object's internal coordinates are not modified.
      * @return the coordinates of the selected object for the time given by jd
      * @param dt  date/time for which the coords will be computed.
      * @param geo pointer to geographic location (used for solar system only)
      * @note Does not update the horizontal coordinates. Call EquatorialToHorizontal for that.
      */
-    SkyPoint recomputeCoords(const KStarsDateTime &dt, const GeoLocation *geo = 0) const;
+    SkyPoint recomputeCoords(const KStarsDateTime &dt, const GeoLocation *geo = nullptr) const;
 
     /**
      * @short Like recomputeCoords, but also calls EquatorialToHorizontal before returning
      */
     SkyPoint recomputeHorizontalCoords(const KStarsDateTime &dt, const GeoLocation *geo) const;
 
     inline bool hasName() const { return !Name.isEmpty(); }
 
     inline bool hasName2() const { return !Name2.isEmpty(); }
 
     inline bool hasLongName() const { return !LongName.isEmpty(); }
 
     /**
      * @short Given the Image title from a URL file, try to convert it to an image credit string.
      */
     QString messageFromTitle(const QString &imageTitle) const;
 
     /**
      * @short Save new user log text
      */
     void saveUserLog(const QString &newLog);
 
     /**
      * @return the pixel distance for offseting the object's name label
      * @note overridden in StarObject, DeepSkyObject, KSPlanetBase
      */
     virtual double labelOffset() const;
 
     /**
      * @short Query whether this SkyObject has a valid AuxInfo structure associated with it.
      * @return true if this SkyObject has a valid AuxInfo structure associated with it, false if not.
      */
     inline bool hasAuxInfo() const { return !(!info); }
 
     /**
      * @return A reference to a QStringList storing a list of Image URLs associated with this SkyObject.
      */
     inline QStringList &ImageList() { return getAuxInfo()->ImageList; }
 
     /**
      * @return A reference to a QStringList storing a list of Image Titles associated with this SkyObject.
      */
     inline QStringList &ImageTitle() { return getAuxInfo()->ImageTitle; }
 
     /**
      * @return A reference to a QStringList storing a list of Information Links associated with
      * this SkyObject.
      */
     inline QStringList &InfoList() { return getAuxInfo()->InfoList; }
 
     /**
      * @return A reference to a QStringList storing a list of Information Link Titles associated with
      * this SkyObject.
      */
     inline QStringList &InfoTitle() { return getAuxInfo()->InfoTitle; }
 
     /**
      * @return a reference to a QString storing the users' log for this SkyObject
      */
     inline QString &userLog() { return getAuxInfo()->userLog; }
 
     inline QString &notes() { return getAuxInfo()->notes; }
 
     void setNotes(QString _notes) { getAuxInfo()->notes = _notes; }
 
     /**
      * @short Return UID for object.
      * This method should be reimplemented in all concrete
      * subclasses. Implementation for SkyObject just returns
      * invalidUID. It's required SkyObject is not an abstract class.
      */
     virtual UID getUID() const;
 
   private:
     /**
      * Compute the UT time when the object will rise or set. It is an auxiliary
      * procedure because it does not use the RA and DEC of the object but values
      * given as parameters. You may want to use riseSetTimeUT() which is
      * public.  riseSetTimeUT() calls this function iteratively.
      * @param dt     target date/time
      * @param geo    pointer to Geographic location
      * @param righta pointer to Right ascention of the object
      * @param decl   pointer to Declination of the object
      * @param rst    Boolean. If true will compute rise time. If false
      * will compute set time.
      * @return the time at which the given position will rise or set.
      */
     QTime auxRiseSetTimeUT(const KStarsDateTime &dt, const GeoLocation *geo, const dms *righta, const dms *decl,
                            bool riseT) const;
 
     /**
      * Compute the LST time when the object will rise or set. It is an auxiliary
      * procedure because it does not use the RA and DEC of the object but values
      * given as parameters. You may want to use riseSetTimeLST() which is
      * public.  riseSetTimeLST() calls this function iteratively.
      * @param gLt Geographic latitude
      * @param rga Right ascention of the object
      * @param decl Declination of the object
      * @param rst Boolean. If true will compute rise time. If false
      * will compute set time.
      */
     dms auxRiseSetTimeLST(const dms *gLt, const dms *rga, const dms *decl, bool rst) const;
 
     /**
      * Compute the approximate hour angle that an object with declination d will have
      * when its altitude is h (as seen from geographic latitude gLat).
      * This function is only used by auxRiseSetTimeLST().
      * @param h pointer to the altitude of the object
      * @param gLat pointer to the geographic latitude
      * @param d pointer to the declination of the object.
      * @return the Hour Angle, in degrees.
      */
     double approxHourAngle(const dms *h, const dms *gLat, const dms *d) const;
 
     /**
      * Correct for the geometric altitude of the center of the body at the
      * time of rising or setting. This is due to refraction at the horizon
      * and to the size of the body. The moon correction has also to take into
      * account parallax. The value we use here is a rough approximation
      * suggested by J. Meeus.
      *
      * Weather status (temperature and pressure basically) is not taken
      * into account although change of conditions between summer and
      * winter could shift the times of sunrise and sunset by 20 seconds.
      *
      * This function is only used by auxRiseSetTimeLST().
      * @return dms object with the correction.
      */
     dms elevationCorrection(void) const;
 
     /**
      * @short Return a pointer to the AuxInfo object associated with this SkyObject.
      * @note  This method creates the AuxInfo object if it is non-existent
      * @return Pointer to an AuxInfo structure
      */
     AuxInfo *getAuxInfo(); // FIXME: Can this be made conceptually const or the like?
 
     unsigned char Type;
     float
         sortMagnitude; // This magnitude is used for sorting / making decisions about the visibility of an object. Should not be NaN.
 
   protected:
     /**
      * Set the object's sorting magnitude.
      * @param m the object's magnitude.
      */
     inline void setMag(float m)
     {
         sortMagnitude =
             m < 36.0 ?
                 m :
                 NaN::
                     f; // Updating faintest sane magnitude to 36.0 (faintest visual magnitude visible with E-ELT, acc. to Wikipedia on Apparent Magnitude.)
     }
     // FIXME: We claim sortMagnitude should not be NaN, but we are setting it to NaN above!! ^
 
     /**
      * Set the object's primary name.
      * @param name the object's primary name
      */
     inline void setName(const QString &name) { Name = name; }
 
     /**
      * Set the object's secondary name.
      * @param name2 the object's secondary name.
      */
     inline void setName2(const QString &name2 = QString()) { Name2 = name2; }
 
     QString Name, Name2, LongName;
 
     // Pointer to an auxiliary info structure that stores Image URLs, Info URLs etc.
     QSharedDataPointer<AuxInfo> info;
 
     // store often used name strings in static variables
     static QString emptyString;
     static QString unnamedString;
     static QString unnamedObjectString;
     static QString starString;
 };
diff --git a/kstars/skyobjects/skypoint.cpp b/kstars/skyobjects/skypoint.cpp
index 18cbd3226..6a619df0b 100644
--- a/kstars/skyobjects/skypoint.cpp
+++ b/kstars/skyobjects/skypoint.cpp
@@ -1,942 +1,942 @@
 /***************************************************************************
                           skypoint.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 11 2001
     copyright            : (C) 2001-2005 by Jason Harris
     email                : jharris@30doradus.org
     copyright            : (C) 2004-2005 by Pablo de Vicente
     email                : p.devicente@wanadoo.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "skypoint.h"
 
 #include "dms.h"
 #include "ksnumbers.h"
 #include "kstarsdatetime.h"
 #include "kssun.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #include "skyobject.h"
 #include "skycomponents/skymapcomposite.h"
 
 #include <KLocalizedString>
 
 #include <QDebug>
 
 #include <cmath>
 
 #ifdef PROFILE_COORDINATE_CONVERSION
 #include <ctime> // For profiling, remove if not profiling.
 long unsigned SkyPoint::eqToHzCalls = 0;
 double SkyPoint::cpuTime_EqToHz     = 0.;
 #endif
 
-KSSun *SkyPoint::m_Sun         = 0;
+KSSun *SkyPoint::m_Sun         = nullptr;
 const double SkyPoint::altCrit = -1.0;
 
 SkyPoint::SkyPoint()
 {
     // Default constructor. Set nonsense values
     RA0.setD(-1);   // RA >= 0 always :-)
     Dec0.setD(180); // Dec is between -90 and 90 Degrees :-)
     RA            = RA0;
     Dec           = Dec0;
     lastPrecessJD = J2000; // By convention, we use J2000 coordinates
 }
 
 SkyPoint::~SkyPoint()
 {
 }
 
 void SkyPoint::set(const dms &r, const dms &d)
 {
     RA0 = RA = r;
     Dec0 = Dec    = d;
     lastPrecessJD = J2000; // By convention, we use J2000 coordinates
 }
 
 void SkyPoint::EquatorialToHorizontal(const dms *LST, const dms *lat)
 {
     //    qDebug() << "NOTE: This EquatorialToHorizontal overload (using dms pointers instead of CachingDms pointers) is deprecated and should be replaced with CachingDms prototype wherever speed is desirable!";
     CachingDms _LST(*LST), _lat(*lat);
     EquatorialToHorizontal(&_LST, &_lat);
 }
 
 void SkyPoint::EquatorialToHorizontal(const CachingDms *LST, const CachingDms *lat)
 {
 #ifdef PROFILE_COORDINATE_CONVERSION
     std::clock_t start = std::clock();
 #endif
     //Uncomment for spherical trig version
     double AltRad, AzRad;
     double sindec, cosdec, sinlat, coslat, sinHA, cosHA;
     double sinAlt, cosAlt;
 
     CachingDms HourAngle =
         (*LST) - ra(); // Using CachingDms subtraction operator to find cos/sin of HourAngle without calling sincos()
 
     lat->SinCos(sinlat, coslat);
     dec().SinCos(sindec, cosdec);
     HourAngle.SinCos(sinHA, cosHA);
 
     sinAlt = sindec * sinlat + cosdec * coslat * cosHA;
     AltRad = asin(sinAlt);
 
     cosAlt = sqrt(
         1 -
         sinAlt *
             sinAlt); // Avoid trigonometric function. Return value of asin is always in [-pi/2, pi/2] and in this domain cosine is always non-negative, so we can use this.
     if (cosAlt == 0)
         cosAlt = cos(AltRad);
 
     double arg = (sindec - sinlat * sinAlt) / (coslat * cosAlt);
     if (arg <= -1.0)
         AzRad = dms::PI;
     else if (arg >= 1.0)
         AzRad = 0.0;
     else
         AzRad = acos(arg);
 
     if (sinHA > 0.0)
         AzRad = 2.0 * dms::PI - AzRad; // resolve acos() ambiguity
 
     Alt.setRadians(AltRad);
     Az.setRadians(AzRad);
 #ifdef PROFILE_COORDINATE_CONVERSION
     std::clock_t stop = std::clock();
     cpuTime_EqToHz += double(stop - start) / double(CLOCKS_PER_SEC); // Accumulate time in seconds
     ++eqToHzCalls;
 #endif
 
     // //Uncomment for XYZ version
     //  	double xr, yr, zr, xr1, zr1, sa, ca;
     // 	//Z-axis rotation by -LST
     // 	dms a = dms( -1.0*LST->Degrees() );
     // 	a.SinCos( sa, ca );
     // 	xr1 = m_X*ca + m_Y*sa;
     // 	yr  = -1.0*m_X*sa + m_Y*ca;
     // 	zr1 = m_Z;
     //
     // 	//Y-axis rotation by lat - 90.
     // 	a = dms( lat->Degrees() - 90.0 );
     // 	a.SinCos( sa, ca );
     // 	xr = xr1*ca - zr1*sa;
     // 	zr = xr1*sa + zr1*ca;
     //
     // 	//FIXME: eventually, we will work with XYZ directly
     // 	Alt.setRadians( asin( zr ) );
     // 	Az.setRadians( atan2( yr, xr ) );
 }
 
 void SkyPoint::HorizontalToEquatorial(const dms *LST, const dms *lat)
 {
     double HARad, DecRad;
     double sinlat, coslat, sinAlt, cosAlt, sinAz, cosAz;
     double sinDec, cosDec;
 
     lat->SinCos(sinlat, coslat);
     alt().SinCos(sinAlt, cosAlt);
     Az.SinCos(sinAz, cosAz);
 
     sinDec = sinAlt * sinlat + cosAlt * coslat * cosAz;
     DecRad = asin(sinDec);
     cosDec = cos(DecRad);
     Dec.setRadians(DecRad);
 
     double x = (sinAlt - sinlat * sinDec) / (coslat * cosDec);
 
     //Under certain circumstances, x can be very slightly less than -1.0000, or slightly
     //greater than 1.0000, leading to a crash on acos(x).  However, the value isn't
     //*really* out of range; it's a kind of roundoff error.
     if (x < -1.0 && x > -1.000001)
         HARad = dms::PI;
     else if (x > 1.0 && x < 1.000001)
         HARad = 0.0;
     else if (x < -1.0)
     {
         //qWarning() << "Coordinate out of range.";
         HARad = dms::PI;
     }
     else if (x > 1.0)
     {
         //qWarning() << "Coordinate out of range.";
         HARad = 0.0;
     }
     else
         HARad = acos(x);
 
     if (sinAz > 0.0)
         HARad = 2.0 * dms::PI - HARad; // resolve acos() ambiguity
 
     RA.setRadians(LST->radians() - HARad);
     RA.reduceToRange(dms::ZERO_TO_2PI);
 }
 
 void SkyPoint::findEcliptic(const CachingDms *Obliquity, dms &EcLong, dms &EcLat)
 {
     double sinRA, cosRA, sinOb, cosOb, sinDec, cosDec, tanDec;
     ra().SinCos(sinRA, cosRA);
     dec().SinCos(sinDec, cosDec);
     Obliquity->SinCos(sinOb, cosOb);
 
     tanDec          = sinDec / cosDec; // FIXME: -jbb div by zero?
     double y        = sinRA * cosOb + tanDec * sinOb;
     double ELongRad = atan2(y, cosRA);
     EcLong.setRadians(ELongRad);
     EcLong.reduceToRange(dms::ZERO_TO_2PI);
     EcLat.setRadians(asin(sinDec * cosOb - cosDec * sinOb * sinRA));
 }
 
 void SkyPoint::setFromEcliptic(const CachingDms *Obliquity, const dms &EcLong, const dms &EcLat)
 {
     double sinLong, cosLong, sinLat, cosLat, sinObliq, cosObliq;
     EcLong.SinCos(sinLong, cosLong);
     EcLat.SinCos(sinLat, cosLat);
     Obliquity->SinCos(sinObliq, cosObliq);
 
     double sinDec = sinLat * cosObliq + cosLat * sinObliq * sinLong;
 
     double y = sinLong * cosObliq - (sinLat / cosLat) * sinObliq;
     //    double RARad =  atan2( y, cosLong );
     RA.setUsing_atan2(y, cosLong);
     RA.reduceToRange(dms::ZERO_TO_2PI);
     Dec.setUsing_asin(sinDec);
 }
 
 void SkyPoint::precess(const KSNumbers *num)
 {
     double cosRA0, sinRA0, cosDec0, sinDec0;
     const Eigen::Matrix3d &precessionMatrix = num->p2();
     Eigen::Vector3d v, s;
 
     RA0.SinCos(sinRA0, cosRA0);
     Dec0.SinCos(sinDec0, cosDec0);
 
     s[0] = cosRA0 * cosDec0;
     s[1] = sinRA0 * cosDec0;
     s[2] = sinDec0;
 
     // NOTE: Rotation matrices are the fastest way to do rotations on
     // a vector. Quaternions need more multiplications. The rotation
     // matrix compensates in some sense by having more 'precomputed'
     // multiplications. The matrix elements seem to cache nicely, so
     // there isn't much overhead in accessing them.
 
     //Multiply P2 and s to get v, the vector representing the new coords.
     // for ( unsigned int i=0; i<3; ++i ) {
     //     v[i] = 0.0;
     //     for (uint j=0; j< 3; ++j) {
     //         v[i] += num->p2( j, i )*s[j];
     //     }
     // }
     v.noalias() = precessionMatrix * s;
 
     //Extract RA, Dec from the vector:
     RA.setUsing_atan2(v[1], v[0]);
     RA.reduceToRange(dms::ZERO_TO_2PI);
     Dec.setUsing_asin(v[2]);
 }
 
 SkyPoint SkyPoint::deprecess(const KSNumbers *num, long double epoch)
 {
     SkyPoint p1(RA, Dec);
     long double now = num->julianDay();
     p1.precessFromAnyEpoch(now, epoch);
     if ((std::isnan(RA0.Degrees()) || std::isnan(Dec0.Degrees())) ||
         (!std::isnan(Dec0.Degrees()) && fabs(Dec0.Degrees()) > 90.0))
     {
         // We have invalid RA0 and Dec0, so set them if epoch = J2000. Otherwise, do not touch.
         if (epoch == J2000)
         {
             RA0  = p1.ra();
             Dec0 = p1.dec();
         }
     }
     return p1;
 }
 
 void SkyPoint::nutate(const KSNumbers *num)
 {
     double cosRA, sinRA, cosDec, sinDec, tanDec;
     double cosOb, sinOb;
 
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     num->obliquity()->SinCos(sinOb, cosOb);
 
     //Step 2: Nutation
     if (fabs(Dec.Degrees()) < 80.0) //approximate method
     {
         tanDec = sinDec / cosDec;
 
         double dRA  = num->dEcLong() * (cosOb + sinOb * sinRA * tanDec) - num->dObliq() * cosRA * tanDec;
         double dDec = num->dEcLong() * (sinOb * cosRA) + num->dObliq() * sinRA;
 
         RA.setD(RA.Degrees() + dRA);
         Dec.setD(Dec.Degrees() + dDec);
     }
     else //exact method
     {
         dms EcLong, EcLat;
         findEcliptic(num->obliquity(), EcLong, EcLat);
 
         //Add dEcLong to the Ecliptic Longitude
         dms newLong(EcLong.Degrees() + num->dEcLong());
         setFromEcliptic(num->obliquity(), newLong, EcLat);
     }
 }
 
 SkyPoint SkyPoint::moveAway(const SkyPoint &from, double dist) const
 {
     CachingDms lat1, dtheta;
 
     if (dist == 0.0)
     {
         qDebug() << "moveAway called with zero distance!";
         return *this;
     }
 
     double dst = fabs(dist * dms::DegToRad / 3600.0); // In radian
 
     // Compute the bearing angle w.r.t. the RA axis ("latitude")
     CachingDms dRA(ra() - from.ra());
     CachingDms dDec(dec() - from.dec());
     double bearing = atan2(dRA.sin() / dRA.cos(), dDec.sin()); // Do not use dRA = PI / 2!!
     //double bearing = atan2( dDec.radians() , dRA.radians() );
 
     //    double dir0 = (dist >= 0 ) ? bearing : bearing + dms::PI; // in radian
     double dir0   = bearing + std::signbit(dist) * dms::PI; // might be faster?
     double sinDst = sin(dst), cosDst = cos(dst);
 
     lat1.setUsing_asin(dec().sin() * cosDst + dec().cos() * sinDst * cos(dir0));
     dtheta.setUsing_atan2(sin(dir0) * sinDst * dec().cos(), cosDst - dec().sin() * lat1.sin());
 
     return SkyPoint(ra() + dtheta, lat1);
 }
 
 bool SkyPoint::checkBendLight()
 {
     // First see if we are close enough to the sun to bother about the
     // gravitational lensing effect. We correct for the effect at
     // least till b = 10 solar radii, where the effect is only about
     // 0.06".  Assuming min. sun-earth distance is 200 solar radii.
     static const dms maxAngle(1.75 * (30.0 / 200.0) / dms::DegToRad);
 
     if (!m_Sun)
     {
         SkyComposite *skycomopsite = KStarsData::Instance()->skyComposite();
 
         if (skycomopsite == nullptr)
             return false;
 
         m_Sun = (KSSun *)skycomopsite->findByName("Sun");
 
         if (m_Sun == nullptr)
             return false;
     }
 
     // TODO: This can be optimized further. We only need a ballpark estimate of the distance to the sun to start with.
     return (fabs(angularDistanceTo(static_cast<const SkyPoint *>(m_Sun)).Degrees()) <=
             maxAngle.Degrees()); // NOTE: dynamic_cast is slow and not important here.
 }
 
 bool SkyPoint::bendlight()
 {
     // NOTE: This should be applied before aberration
     // NOTE: One must call checkBendLight() before unnecessarily calling this.
     // We correct for GR effects
 
     // NOTE: This code is buggy. The sun needs to be initialized to
     // the current epoch -- but we are not certain that this is the
     // case. We have, as of now, no way of telling if the sun is
     // initialized or not. If we initialize the sun here, we will be
     // slowing down the program rather substantially and potentially
     // introducing bugs. Therefore, we just ignore this problem, and
     // hope that whenever the user is interested in seeing the effects
     // of GR, we have the sun initialized correctly. This is usually
     // the case. When the sun is not correctly initialized, rearth()
     // is not computed, so we just assume it is nominally equal to 1
     // AU to get a reasonable estimate.
     Q_ASSERT(m_Sun);
     double corr_sec = 1.75 * m_Sun->physicalSize() /
                       ((std::isfinite(m_Sun->rearth()) ? m_Sun->rearth() : 1) * AU_KM *
                        angularDistanceTo(static_cast<const SkyPoint *>(m_Sun)).sin());
     Q_ASSERT(corr_sec > 0);
 
     SkyPoint sp = moveAway(*m_Sun, corr_sec);
     setRA(sp.ra());
     setDec(sp.dec());
     return true;
 }
 
 void SkyPoint::aberrate(const KSNumbers *num)
 {
     double cosRA, sinRA, cosDec, sinDec;
     double cosOb, sinOb, cosL, sinL, cosP, sinP;
 
     double K = num->constAberr().Degrees(); //constant of aberration
     double e = num->earthEccentricity();
 
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     num->obliquity()->SinCos(sinOb, cosOb);
     // double tanOb = sinOb/cosOb;
 
     num->sunTrueLongitude().SinCos(sinL, cosL);
     num->earthPerihelionLongitude().SinCos(sinP, cosP);
 
     //Step 3: Aberration
     // double dRA = -1.0 * K * ( cosRA * cosL * cosOb + sinRA * sinL )/cosDec
     //               + e * K * ( cosRA * cosP * cosOb + sinRA * sinP )/cosDec;
 
     // double dDec = -1.0 * K * ( cosL * cosOb * ( tanOb * cosDec - sinRA * sinDec ) + cosRA * sinDec * sinL )
     //                + e * K * ( cosP * cosOb * ( tanOb * cosDec - sinRA * sinDec ) + cosRA * sinDec * sinP );
 
     double dRA = K * (cosRA * cosOb / cosDec) * (e * cosP - cosL);
     double dDec =
         K * (sinRA * (sinOb * cosDec - cosOb * sinDec) * (e * cosP - cosL) + cosRA * sinDec * (e * sinP - sinL));
 
     RA.setD(RA.Degrees() + dRA);
     Dec.setD(Dec.Degrees() + dDec);
 }
 
 // Note: This method is one of the major rate determining factors in how fast the map pans / zooms in or out
 void SkyPoint::updateCoords(const KSNumbers *num, bool /*includePlanets*/, const CachingDms *lat, const CachingDms *LST,
                             bool forceRecompute)
 {
     //Correct the catalog coordinates for the time-dependent effects
     //of precession, nutation and aberration
     bool recompute, lens;
 
     // NOTE: The same short-circuiting checks are also implemented in
     // StarObject::JITUpdate(), even before calling
     // updateCoords(). While this is code-duplication, these bits of
     // code need to be really optimized, at least for stars. For
     // optimization purposes, the code is left duplicated in two
     // places. Please be wary of changing one without changing the
     // other.
 
     Q_ASSERT(std::isfinite(lastPrecessJD));
 
     if (Options::useRelativistic() && checkBendLight())
     {
         recompute = true;
         lens      = true;
     }
     else
     {
         recompute = (Options::alwaysRecomputeCoordinates() || forceRecompute ||
                      std::abs(lastPrecessJD - num->getJD()) >= 0.00069444); // Update once per solar minute
         lens      = false;
     }
     if (recompute)
     {
         precess(num);
         nutate(num);
         if (lens)
             bendlight(); // FIXME: Shouldn't we apply this on the horizontal coordinates?
         aberrate(num);
         lastPrecessJD = num->getJD();
         Q_ASSERT(std::isfinite(RA.Degrees()) && std::isfinite(Dec.Degrees()));
     }
 
     if (lat || LST)
         qWarning() << i18n("lat and LST parameters should only be used in KSPlanetBase objects.");
 }
 
 void SkyPoint::precessFromAnyEpoch(long double jd0, long double jdf)
 {
     double cosRA, sinRA, cosDec, sinDec;
     double v[3], s[3];
 
     RA  = RA0;
     Dec = Dec0; // Is this necessary?
 
     if (jd0 == jdf)
         return;
 
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     if (jd0 == B1950)
     {
         B1950ToJ2000();
         jd0 = J2000;
         RA.SinCos(sinRA, cosRA);
         Dec.SinCos(sinDec, cosDec);
     }
 
     if (jd0 != jdf)
     {
         // The original coordinate is referred to the FK5 system and
         // is NOT J2000.
         if (jd0 != J2000)
         {
             //v is a column vector representing input coordinates.
             v[0] = cosRA * cosDec;
             v[1] = sinRA * cosDec;
             v[2] = sinDec;
 
             //Need to first precess to J2000.0 coords
             //s is the product of P1 and v; s represents the
             //coordinates precessed to J2000
             KSNumbers num(jd0);
             for (unsigned int i = 0; i < 3; ++i)
             {
                 s[i] = num.p1(0, i) * v[0] + num.p1(1, i) * v[1] + num.p1(2, i) * v[2];
             }
 
             //Input coords already in J2000, set s accordingly.
         }
         else
         {
             s[0] = cosRA * cosDec;
             s[1] = sinRA * cosDec;
             s[2] = sinDec;
         }
 
         if (jdf == B1950)
         {
             RA.setRadians(atan2(s[1], s[0]));
             Dec.setRadians(asin(s[2]));
             J2000ToB1950();
 
             return;
         }
 
         KSNumbers num(jdf);
         for (unsigned int i = 0; i < 3; ++i)
         {
             v[i] = num.p2(0, i) * s[0] + num.p2(1, i) * s[1] + num.p2(2, i) * s[2];
         }
 
         RA.setUsing_atan2(v[1], v[0]);
         Dec.setUsing_asin(v[2]);
 
         RA.reduceToRange(dms::ZERO_TO_2PI);
 
         return;
     }
 }
 
 void SkyPoint::apparentCoord(long double jd0, long double jdf)
 {
     precessFromAnyEpoch(jd0, jdf);
     KSNumbers num(jdf);
     nutate(&num);
     if (Options::useRelativistic() && checkBendLight())
         bendlight();
     aberrate(&num);
 }
 
 void SkyPoint::Equatorial1950ToGalactic(dms &galLong, dms &galLat)
 {
     double a = 192.25;
     double sinb, cosb, sina_RA, cosa_RA, sinDEC, cosDEC, tanDEC;
 
     dms c(303.0);
     dms b(27.4);
     tanDEC = tan(Dec.radians());
 
     b.SinCos(sinb, cosb);
     dms(a - RA.Degrees()).SinCos(sina_RA, cosa_RA);
     Dec.SinCos(sinDEC, cosDEC);
 
     galLong.setRadians(c.radians() - atan2(sina_RA, cosa_RA * sinb - tanDEC * cosb));
     galLong.reduceToRange(dms::ZERO_TO_2PI);
 
     galLat.setRadians(asin(sinDEC * sinb + cosDEC * cosb * cosa_RA));
 }
 
 void SkyPoint::GalacticToEquatorial1950(const dms *galLong, const dms *galLat)
 {
     double a = 123.0;
     double sinb, cosb, singLat, cosgLat, tangLat, singLong_a, cosgLong_a;
 
     dms c(12.25);
     dms b(27.4);
     tangLat = tan(galLat->radians());
     galLat->SinCos(singLat, cosgLat);
 
     dms(galLong->Degrees() - a).SinCos(singLong_a, cosgLong_a);
     b.SinCos(sinb, cosb);
 
     RA.setRadians(c.radians() + atan2(singLong_a, cosgLong_a * sinb - tangLat * cosb));
     RA.reduceToRange(dms::ZERO_TO_2PI);
 
     Dec.setRadians(asin(singLat * sinb + cosgLat * cosb * cosgLong_a));
 }
 
 void SkyPoint::B1950ToJ2000(void)
 {
     double cosRA, sinRA, cosDec, sinDec;
     //	double cosRA0, sinRA0, cosDec0, sinDec0;
     double v[3], s[3];
 
     // 1984 January 1 0h
     KSNumbers num(2445700.5);
 
     // Eterms due to aberration
     addEterms();
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     // Precession from B1950 to J1984
     s[0] = cosRA * cosDec;
     s[1] = sinRA * cosDec;
     s[2] = sinDec;
     for (unsigned int i = 0; i < 3; ++i)
     {
         v[i] = num.p2b(0, i) * s[0] + num.p2b(1, i) * s[1] + num.p2b(2, i) * s[2];
     }
 
     // RA zero-point correction at 1984 day 1, 0h.
     RA.setRadians(atan2(v[1], v[0]));
     Dec.setRadians(asin(v[2]));
 
     RA.setH(RA.Hours() + 0.06390 / 3600.);
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     s[0] = cosRA * cosDec;
     s[1] = sinRA * cosDec;
     s[2] = sinDec;
 
     // Precession from 1984 to J2000.
 
     for (unsigned int i = 0; i < 3; ++i)
     {
         v[i] = num.p1(0, i) * s[0] + num.p1(1, i) * s[1] + num.p1(2, i) * s[2];
     }
 
     RA.setRadians(atan2(v[1], v[0]));
     Dec.setRadians(asin(v[2]));
 }
 
 void SkyPoint::J2000ToB1950(void)
 {
     double cosRA, sinRA, cosDec, sinDec;
     //	double cosRA0, sinRA0, cosDec0, sinDec0;
     double v[3], s[3];
 
     // 1984 January 1 0h
     KSNumbers num(2445700.5);
 
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     s[0] = cosRA * cosDec;
     s[1] = sinRA * cosDec;
     s[2] = sinDec;
 
     // Precession from J2000 to 1984 day, 0h.
 
     for (unsigned int i = 0; i < 3; ++i)
     {
         v[i] = num.p2(0, i) * s[0] + num.p2(1, i) * s[1] + num.p2(2, i) * s[2];
     }
 
     RA.setRadians(atan2(v[1], v[0]));
     Dec.setRadians(asin(v[2]));
 
     // RA zero-point correction at 1984 day 1, 0h.
 
     RA.setH(RA.Hours() - 0.06390 / 3600.);
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     // Precession from B1950 to J1984
 
     s[0] = cosRA * cosDec;
     s[1] = sinRA * cosDec;
     s[2] = sinDec;
     for (unsigned int i = 0; i < 3; ++i)
     {
         v[i] = num.p1b(0, i) * s[0] + num.p1b(1, i) * s[1] + num.p1b(2, i) * s[2];
     }
 
     RA.setRadians(atan2(v[1], v[0]));
     Dec.setRadians(asin(v[2]));
 
     // Eterms due to aberration
     subtractEterms();
 }
 
 SkyPoint SkyPoint::Eterms(void)
 {
     double sd, cd, sinEterm, cosEterm;
     dms raTemp, raDelta, decDelta;
 
     Dec.SinCos(sd, cd);
     raTemp.setH(RA.Hours() + 11.25);
     raTemp.SinCos(sinEterm, cosEterm);
 
     raDelta.setH(0.0227 * sinEterm / (3600. * cd));
     decDelta.setD(0.341 * cosEterm * sd / 3600. + 0.029 * cd / 3600.);
 
     return SkyPoint(raDelta, decDelta);
 }
 
 void SkyPoint::addEterms(void)
 {
     SkyPoint spd = Eterms();
 
     RA  = RA + spd.ra();
     Dec = Dec + spd.dec();
 }
 
 void SkyPoint::subtractEterms(void)
 {
     SkyPoint spd = Eterms();
 
     RA  = RA - spd.ra();
     Dec = Dec - spd.dec();
 }
 
 dms SkyPoint::angularDistanceTo(const SkyPoint *sp, double *const positionAngle) const
 {
     // double dalpha = sp->ra().radians() - ra().radians() ;
     // double ddelta = sp->dec().radians() - dec().radians();
     CachingDms dalpha = sp->ra() - ra();
     CachingDms ddelta = sp->dec() - dec();
 
     // double sa = sin(dalpha/2.);
     // double sd = sin(ddelta/2.);
 
     // double hava = sa*sa;
     // double havd = sd*sd;
 
     // Compute the haversin directly:
     double hava = (1 - dalpha.cos()) / 2.;
     double havd = (1 - ddelta.cos()) / 2.;
 
     // Haversine law
     double aux = havd + (sp->dec().cos()) * dec().cos() * hava;
 
     dms angDist;
     angDist.setRadians(2. * fabs(asin(sqrt(aux))));
 
     if (positionAngle)
     {
         // Also compute the position angle of the line from this SkyPoint to sp
         //*positionAngle = acos( tan(-ddelta)/tan( angDist.radians() ) ); // FIXME: Might fail for large ddelta / zero angDist
         //if( -dalpha < 0 )
         //            *positionAngle = 2*M_PI - *positionAngle;
         *positionAngle =
             atan2f(dalpha.sin(), (dec().cos()) * tan(sp->dec().radians()) - (dec().sin()) * dalpha.cos()) * 180 / M_PI;
     }
     return angDist;
 }
 
 double SkyPoint::vRSun(long double jd0)
 {
     double ca, sa, cd, sd, vsun;
     double cosRA, sinRA, cosDec, sinDec;
 
     /* Sun apex (where the sun goes) coordinates */
 
     dms asun(270.9592); // Right ascention: 18h 3m 50.2s [J2000]
     dms dsun(30.00467); // Declination: 30^o 0' 16.8'' [J2000]
     vsun = 20.;         // [km/s]
 
     asun.SinCos(sa, ca);
     dsun.SinCos(sd, cd);
 
     /* We need an auxiliary SkyPoint since we need the
     * source referred to the J2000 equinox and we do not want to ovewrite
     * the current values
     */
 
     SkyPoint aux;
     aux.set(RA0, Dec0);
 
     aux.precessFromAnyEpoch(jd0, J2000);
 
     aux.ra().SinCos(sinRA, cosRA);
     aux.dec().SinCos(sinDec, cosDec);
 
     /* Computation is done performing the scalar product of a unitary vector
     in the direction of the source with the vector velocity of Sun, both being in the
     LSR reference system:
     Vlsr	= Vhel + Vsun.u_radial =>
     Vlsr 	= Vhel + vsun(cos D cos A,cos D sen A,sen D).(cos d cos a,cos d sen a,sen d)
     Vhel 	= Vlsr - Vsun.u_radial
     */
 
     return vsun * (cd * cosDec * (cosRA * ca + sa * sinRA) + sd * sinDec);
 }
 
 double SkyPoint::vHeliocentric(double vlsr, long double jd0)
 {
     return vlsr - vRSun(jd0);
 }
 
 double SkyPoint::vHelioToVlsr(double vhelio, long double jd0)
 {
     return vhelio + vRSun(jd0);
 }
 
 double SkyPoint::vREarth(long double jd0)
 {
     double sinRA, sinDec, cosRA, cosDec;
 
     /* u_radial = unitary vector in the direction of the source
         Vlsr 	= Vhel + Vsun.u_radial
             = Vgeo + VEarth.u_radial + Vsun.u_radial  =>
 
         Vgeo 	= (Vlsr -Vsun.u_radial) - VEarth.u_radial
             =  Vhel - VEarth.u_radial
             =  Vhel - (vx, vy, vz).(cos d cos a,cos d sen a,sen d)
     */
 
     /* We need an auxiliary SkyPoint since we need the
     * source referred to the J2000 equinox and we do not want to ovewrite
     * the current values
     */
 
     SkyPoint aux(RA0, Dec0);
 
     aux.precessFromAnyEpoch(jd0, J2000);
 
     aux.ra().SinCos(sinRA, cosRA);
     aux.dec().SinCos(sinDec, cosDec);
 
     /* vEarth is referred to the J2000 equinox, hence we need that
     the source coordinates are also in the same reference system.
     */
 
     KSNumbers num(jd0);
     return num.vEarth(0) * cosDec * cosRA + num.vEarth(1) * cosDec * sinRA + num.vEarth(2) * sinDec;
 }
 
 double SkyPoint::vGeocentric(double vhelio, long double jd0)
 {
     return vhelio - vREarth(jd0);
 }
 
 double SkyPoint::vGeoToVHelio(double vgeo, long double jd0)
 {
     return vgeo + vREarth(jd0);
 }
 
 double SkyPoint::vRSite(double vsite[3])
 {
     double sinRA, sinDec, cosRA, cosDec;
 
     RA.SinCos(sinRA, cosRA);
     Dec.SinCos(sinDec, cosDec);
 
     return vsite[0] * cosDec * cosRA + vsite[1] * cosDec * sinRA + vsite[2] * sinDec;
 }
 
 double SkyPoint::vTopoToVGeo(double vtopo, double vsite[3])
 {
     return vtopo + vRSite(vsite);
 }
 
 double SkyPoint::vTopocentric(double vgeo, double vsite[3])
 {
     return vgeo - vRSite(vsite);
 }
 
 bool SkyPoint::checkCircumpolar(const dms *gLat) const
 {
     return fabs(dec().Degrees()) > (90 - fabs(gLat->Degrees()));
 }
 
 dms SkyPoint::altRefracted() const
 {
     if (Options::useRefraction())
         return refract(Alt);
     else
         return Alt;
 }
 
 double SkyPoint::refractionCorr(double alt)
 {
     return 1.02 / tan(dms::DegToRad * (alt + 10.3 / (alt + 5.11))) / 60;
 }
 
 double SkyPoint::refract(const double alt)
 {
     static double corrCrit = SkyPoint::refractionCorr(SkyPoint::altCrit);
 
     if (alt > SkyPoint::altCrit)
         return (alt + SkyPoint::refractionCorr(alt));
     else
         return (alt +
                 corrCrit * (alt + 90) /
                     (SkyPoint::altCrit + 90)); // Linear extrapolation from corrCrit at altCrit to 0 at -90 degrees
 }
 
 // Found uncorrected value by solving equation. This is OK since
 // unrefract is never called in loops.
 //
 // Convergence is quite fast just a few iterations.
 double SkyPoint::unrefract(const double alt)
 {
     double h0 = alt;
     double h1 =
         alt -
         (refract(h0) -
          h0); // It's probably okay to add h0 in refract() and subtract it here, since refract() is called way more frequently.
 
     while (fabs(h1 - h0) > 1e-4)
     {
         h0 = h1;
         h1 = alt - (refract(h0) - h0);
     }
     return h1;
 }
 
 dms SkyPoint::findAltitude(const SkyPoint *p, const KStarsDateTime &dt, const GeoLocation *geo, const double hour)
 {
     Q_ASSERT(p);
     if (!p)
         return dms(NaN::d);
 
     // Jasem 2015-08-24 Using correct procedure to find altitude
     return SkyPoint::timeTransformed(p, dt, geo, hour).alt();
 }
 
 SkyPoint SkyPoint::timeTransformed(const SkyPoint *p, const KStarsDateTime &dt, const GeoLocation *geo,
                                    const double hour)
 {
     Q_ASSERT(p);
     if (!p)
         return SkyPoint(NaN::d, NaN::d);
 
     // Jasem 2015-08-24 Using correct procedure to find altitude
     SkyPoint sp                   = *p; // make a copy
     KStarsDateTime targetDateTime = dt.addSecs(hour * 3600.0);
     dms LST                       = geo->GSTtoLST(targetDateTime.gst());
     sp.EquatorialToHorizontal(&LST, geo->lat());
     return sp;
 }
 
 double SkyPoint::maxAlt(const dms &lat) const
 {
     double retval = (lat.Degrees() + 90. - dec().Degrees());
     if (retval > 90.)
         retval = 180. - retval;
     return retval;
 }
 
 double SkyPoint::minAlt(const dms &lat) const
 {
     double retval = (lat.Degrees() - 90. + dec().Degrees());
     if (retval < -90.)
         retval = 180. + retval;
     return retval;
 }
diff --git a/kstars/skyobjects/skypoint.h b/kstars/skyobjects/skypoint.h
index 6fce57359..b6ff4ebc6 100644
--- a/kstars/skyobjects/skypoint.h
+++ b/kstars/skyobjects/skypoint.h
@@ -1,580 +1,580 @@
 /***************************************************************************
                           skypoint.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun Feb 11 2001
     copyright            : (C) 2001-2005 by Jason Harris
     email                : jharris@30doradus.org
     copyright            : (C) 2004-2005 by Pablo de Vicente
     email                : p.devicente@wanadoo.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "cachingdms.h"
 #include "kstarsdatetime.h"
 
 #include <QList>
 
 //#define PROFILE_COORDINATE_CONVERSION
 
 class KSNumbers;
 class KSSun;
 class GeoLocation;
 
 /** @class SkyPoint
 	*
 	*The sky coordinates of a point in the sky.  The
 	*coordinates are stored in both Equatorial (Right Ascension,
 	*Declination) and Horizontal (Azimuth, Altitude) coordinate systems.
 	*Provides set/get functions for each coordinate angle, and functions
 	*to convert between the Equatorial and Horizon coordinate systems.
 	*
 	*Because the coordinate values change slowly over time (due to
 	*precession, nutation), the "catalog coordinates" are stored
 	*(RA0, Dec0), which were the true coordinates on Jan 1, 2000.
 	*The true coordinates (RA, Dec) at any other epoch can be found
 	*from the catalog coordinates using updateCoords().
 	*@short Stores dms coordinates for a point in the sky.
 	*for converting between coordinate systems.
 	*@author Jason Harris
 	*@version 1.0
 	*/
 class SkyPoint
 {
   public:
     /** Default constructor: Sets RA, Dec and RA0, Dec0 according
         	*to arguments.  Does not set Altitude or Azimuth.
         	*@param r Right Ascension
         	*@param d Declination
         	*/
     SkyPoint(const dms &r, const dms &d) : RA0(r), Dec0(d), RA(r), Dec(d), lastPrecessJD(J2000) {}
 
     SkyPoint(const CachingDms &r, const CachingDms &d) : RA0(r), Dec0(d), RA(r), Dec(d), lastPrecessJD(J2000) {}
 
     /** Alternate constructor using double arguments, for convenience.
          *It behaves essentially like the default constructor.
          *@param r Right Ascension, expressed as a double
          *@param d Declination, expressed as a double
          *@note This also sets RA0 and Dec0
          */
     //FIXME: this (*15.0) thing is somewhat hacky.
     explicit SkyPoint(double r, double d) : RA0(r * 15.0), Dec0(d), RA(r * 15.0), Dec(d), lastPrecessJD(J2000) {}
 
     /**
          *@short Default constructor. Sets nonsense values for RA, Dec etc
          */
     SkyPoint();
 
     virtual ~SkyPoint();
 
     ////
     //// 1.  Setting Coordinates
     //// =======================
 
     /**
          * @short Sets RA, Dec and RA0, Dec0 according to arguments.
          *        Does not set Altitude or Azimuth.
          * @param r Right Ascension
          * @param d Declination
          * @note This function also sets RA0 and Dec0 to the same values, so call at your own peril!
          * @note FIXME: This method must be removed, or an epoch argument must be added.
          */
     void set(const dms &r, const dms &d);
 
     /** Sets RA0, the catalog Right Ascension.
         	*@param r catalog Right Ascension.
         	*/
     inline void setRA0(dms r) { RA0 = r; }
     inline void setRA0(CachingDms r) { RA0 = r; }
 
     /** Overloaded member function, provided for convenience.
         	*It behaves essentially like the above function.
         	*@param r Right Ascension, expressed as a double.
         	*/
     inline void setRA0(double r) { RA0.setH(r); }
 
     /** Sets Dec0, the catalog Declination.
         	*@param d catalog Declination.
         	*/
     inline void setDec0(dms d) { Dec0 = d; }
     inline void setDec0(const CachingDms &d) { Dec0 = d; }
 
     /** Overloaded member function, provided for convenience.
         	*It behaves essentially like the above function.
         	*@param d Declination, expressed as a double.
         	*/
     inline void setDec0(double d) { Dec0.setD(d); }
 
     /** Sets RA, the current Right Ascension.
         	*@param r Right Ascension.
         	*/
     inline void setRA(dms& r) { RA = r; }
     inline void setRA(const CachingDms &r) { RA = r; }
 
     /** Overloaded member function, provided for convenience.
         	*It behaves essentially like the above function.
         	*@param r Right Ascension, expressed as a double.
         	*/
     inline void setRA(double r) { RA.setH(r); }
 
     /** Sets Dec, the current Declination
         	*@param d Declination.
         	*/
     inline void setDec(dms d) { Dec = d; }
     inline void setDec(const CachingDms &d) { Dec = d; }
 
     /** Overloaded member function, provided for convenience.
         	*It behaves essentially like the above function.
         	*@param d Declination, expressed as a double.
         	*/
     inline void setDec(double d) { Dec.setD(d); }
 
     /** Sets Alt, the Altitude.
         	*@param alt Altitude.
         	*/
     inline void setAlt(dms alt) { Alt = alt; }
 
     /** Overloaded member function, provided for convenience.
         	*It behaves essentially like the above function.
         	*@param alt Altitude, expressed as a double.
         	*/
     inline void setAlt(double alt) { Alt.setD(alt); }
 
     /** Sets Az, the Azimuth.
         	*@param az Azimuth.
         	*/
     inline void setAz(dms az) { Az = az; }
 
     /** Overloaded member function, provided for convenience.
         	*It behaves essentially like the above function.
         	*@param az Azimuth, expressed as a double.
         	*/
     inline void setAz(double az) { Az.setD(az); }
 
     ////
     //// 2. Returning coordinates.
     //// =========================
 
     /** @return a pointer to the catalog Right Ascension. */
     inline const CachingDms &ra0() const { return RA0; }
 
     /** @return a pointer to the catalog Declination. */
     inline const CachingDms &dec0() const { return Dec0; }
 
     /** @returns a pointer to the current Right Ascension. */
     inline const CachingDms &ra() const { return RA; }
 
     /** @return a pointer to the current Declination. */
     inline const CachingDms &dec() const { return Dec; }
 
     /** @return a pointer to the current Azimuth. */
     inline const dms &az() const { return Az; }
 
     /** @return a pointer to the current Altitude. */
     inline const dms &alt() const { return Alt; }
 
     /** @return refracted altitude. This function uses
          * Options::useRefraction to determine whether refraction
          * correction should be applied */
     dms altRefracted() const;
 
     /**
          * @return the JD for the precessed coordinates
          */
     inline double getLastPrecessJD() const { return lastPrecessJD; }
 
     /**
          * @return the airmass of the point. Convenience method.
          * @note Question: is it better to use alt or refracted alt? Minor difference, probably doesn't matter.
          */
     inline double airmass() const { return 1. / sin(alt().radians()); }
 
     ////
     //// 3. Coordinate conversions.
     //// ==========================
 
     /** Determine the (Altitude, Azimuth) coordinates of the
         	*SkyPoint from its (RA, Dec) coordinates, given the local
         	*sidereal time and the observer's latitude.
         	*@param LST pointer to the local sidereal time
         	*@param lat pointer to the geographic latitude
         	*/
     void EquatorialToHorizontal(const CachingDms *LST, const CachingDms *lat);
 
     // Deprecated method provided for compatibility
     void EquatorialToHorizontal(const dms *LST, const dms *lat);
 
     /** Determine the (RA, Dec) coordinates of the
         	*SkyPoint from its (Altitude, Azimuth) coordinates, given the local
         	*sidereal time and the observer's latitude.
         	*@param LST pointer to the local sidereal time
         	*@param lat pointer to the geographic latitude
         	*/
     void HorizontalToEquatorial(const dms *LST, const dms *lat);
 
     /** Determine the Ecliptic coordinates of the SkyPoint, given the Julian Date.
         	*The ecliptic coordinates are returned as reference arguments (since
         	*they are not stored internally)
         	*/
     void findEcliptic(const CachingDms *Obliquity, dms &EcLong, dms &EcLat);
 
     /** Set the current (RA, Dec) coordinates of the
         	*SkyPoint, given pointers to its Ecliptic (Long, Lat) coordinates, and
         	*to the current obliquity angle (the angle between the equator and ecliptic).
         	*/
     void setFromEcliptic(const CachingDms *Obliquity, const dms &EcLong, const dms &EcLat);
 
     /** Computes galactic coordinates from equatorial coordinates referred to
         	* epoch 1950. RA and Dec are, therefore assumed to be B1950
         	* coordinates.
         	*/
     void Equatorial1950ToGalactic(dms &galLong, dms &galLat);
 
     /** Computes equatorial coordinates referred to 1950 from galactic ones referred to
         	* epoch B1950. RA and Dec are, therefore assumed to be B1950
         	* coordinates.
         	*/
     void GalacticToEquatorial1950(const dms *galLong, const dms *galLat);
 
     ////
     //// 4. Coordinate update/corrections.
     //// =================================
 
     /** Determine the current coordinates (RA, Dec) from the catalog
         	*coordinates (RA0, Dec0), accounting for both precession and nutation.
             *@param num pointer to KSNumbers object containing current values of time-dependent variables.
         	*@param includePlanets does nothing in this implementation (see KSPlanetBase::updateCoords()).
         	*@param lat does nothing in this implementation (see KSPlanetBase::updateCoords()).
         	*@param LST does nothing in this implementation (see KSPlanetBase::updateCoords()).
             *@param forceRecompute reapplies precession, nutation and aberration even if the time passed since the last computation is not significant.
         	*/
-    virtual void updateCoords(const KSNumbers *num, bool includePlanets = true, const CachingDms *lat = 0,
-                              const CachingDms *LST = 0, bool forceRecompute = false);
+    virtual void updateCoords(const KSNumbers *num, bool includePlanets = true, const CachingDms *lat = nullptr,
+                              const CachingDms *LST = nullptr, bool forceRecompute = false);
 
     /**
          * @brief updateCoordsNow Shortcut for updateCoords( const KSNumbers *num, false, nullptr, nullptr, true)
          * @param num pointer to KSNumbers object containing current values of time-dependent variables.
          */
     void updateCoordsNow(const KSNumbers *num) { updateCoords(num, false, nullptr, nullptr, true); }
 
     /** Computes the apparent coordinates for this SkyPoint for any epoch,
         	*accounting for the effects of precession, nutation, and aberration.
         	*Similar to updateCoords(), but the starting epoch need not be
         	*J2000, and the target epoch need not be the present time.
         	*@param jd0 Julian Day which identifies the original epoch
         	*@param jdf Julian Day which identifies the final epoch
         	*/
     void apparentCoord(long double jd0, long double jdf);
 
     /** Determine the effects of nutation for this SkyPoint.
         	*@param num pointer to KSNumbers object containing current values of
         	*time-dependent variables.
         	*/
     void nutate(const KSNumbers *num);
 
     /**
          *@short Check if this sky point is close enough to the sun for
          * gravitational lensing to be significant
          */
     bool checkBendLight();
 
     /** Correct for the effect of "bending" of light around the sun for
          * positions near the sun.
          *
          * General Relativity tells us that a photon with an impact
          * parameter b is deflected through an angle 1.75" (Rs / b) where
          * Rs is the solar radius.
          *
          * @return: true if the light was bent, false otherwise
          */
     bool bendlight();
 
     /**
          *@short Obtain a Skypoint with RA0 and Dec0 set from the RA, Dec
          * of this skypoint. Also set the RA0, Dec0 of this SkyPoint if not
          * set already and the target epoch is J2000.
          */
     SkyPoint deprecess(const KSNumbers *num, long double epoch = J2000);
 
     /** Determine the effects of aberration for this SkyPoint.
         	*@param num pointer to KSNumbers object containing current values of
         	*time-dependent variables.
         	*/
     void aberrate(const KSNumbers *num);
 
     /** General case of precession. It precess from an original epoch to a
         	*final epoch. In this case RA0, and Dec0 from SkyPoint object represent
         	*the coordinates for the original epoch and not for J2000, as usual.
         	*@param jd0 Julian Day which identifies the original epoch
         	*@param jdf Julian Day which identifies the final epoch
         	*/
     void precessFromAnyEpoch(long double jd0, long double jdf);
 
     /** Determine the E-terms of aberration
          *In the past, the mean places of stars published in catalogs included
          *the contribution to the aberration due to the ellipticity of the orbit
          *of the Earth. These terms, known as E-terms were almost constant, and
          *in the newer catalogs (FK5) are not included. Therefore to convert from
          *FK4 to FK5 one has to compute these E-terms.
          */
     SkyPoint Eterms(void);
 
     /** Exact precession from Besselian epoch 1950 to epoch J2000. The
         *coordinates referred to the first epoch are in the
         FK4 catalog, while the latter are in the Fk5 one.
         *Reference: Smith, C. A.; Kaplan, G. H.; Hughes, J. A.; Seidelmann,
         *P. K.; Yallop, B. D.; Hohenkerk, C. Y.
         *Astronomical Journal, vol. 97, Jan. 1989, p. 265-279
         *This transformation requires 4 steps:
         * - Correct E-terms
         * - Precess from B1950 to 1984, January 1st, 0h, using Newcomb expressions
         * - Add zero point correction in right ascension for 1984
         * - Precess from 1984, January 1st, 0h to J2000
         */
     void B1950ToJ2000(void);
 
     /** Exact precession from epoch J2000 Besselian epoch 1950. The coordinates
         *referred to the first epoch are in the FK4 catalog, while the
         *latter are in the Fk5 one.
         *Reference: Smith, C. A.; Kaplan, G. H.; Hughes, J. A.; Seidelmann,
         *P. K.; Yallop, B. D.; Hohenkerk, C. Y.
         *Astronomical Journal, vol. 97, Jan. 1989, p. 265-279
         *This transformation requires 4 steps:
         * - Precess from J2000 to 1984, January 1st, 0h
         * - Add zero point correction in right ascension for 1984
         * - Precess from 1984, January 1st, 0h, to B1950 using Newcomb expressions
         * - Correct E-terms
         */
     void J2000ToB1950(void);
 
     /** Coordinates in the FK4 catalog include the effect of aberration due
          *to the ellipticity of the orbit of the Earth. Coordinates in the FK5
          *catalog do not include these terms. In order to convert from B1950 (FK4)
          *to actual mean places one has to use this function.
         */
     void addEterms(void);
 
     /** Coordinates in the FK4 catalog include the effect of aberration due
          *to the ellipticity of the orbit of the Earth. Coordinates in the FK5
          *catalog do not include these terms. In order to convert from
          * FK5 coordinates to B1950 (FK4) one has to use this function.
         */
     void subtractEterms(void);
 
     /** Computes the angular distance between two SkyObjects. The algorithm
          *  to compute this distance is:
          *  cos(distance) = sin(d1)*sin(d2) + cos(d1)*cos(d2)*cos(a1-a2)
          *  where a1,d1 are the coordinates of the first object and a2,d2 are
          *  the coordinates of the second object.
          *  However this algorithm is not accurate when the angular separation
          *  is small.
          *  Meeus provides a different algorithm in page 111 which we
          *  implement here.
          *  @param sp SkyPoint to which distance is to be calculated
          *  @param positionAngle if a non-null pointer is passed, the position angle [E of N] in degrees from this SkyPoint to sp is computed and stored in the passed variable.
          *  @return dms angle representing angular separation.
          **/
-    dms angularDistanceTo(const SkyPoint *sp, double *const positionAngle = 0) const;
+    dms angularDistanceTo(const SkyPoint *sp, double *const positionAngle = nullptr) const;
 
     /**
          * @return returns true if _current_ epoch RA / Dec match
          */
     inline bool operator==(SkyPoint &p) const { return (ra() == p.ra() && dec() == p.dec()); }
 
     /** Computes the velocity of the Sun projected on the direction of the source.
          *
          * @param jd Epoch expressed as julian day to which the source coordinates refer to.
          * @return Radial velocity of the source referred to the barycenter of the solar system in km/s
          **/
     double vRSun(long double jd);
 
     /** Computes the radial velocity of a source referred to the solar system barycenter
          * from the radial velocity referred to the
          * Local Standard of Rest, aka known as VLSR. To compute it we need the coordinates of the
          * source the VLSR and the epoch for the source coordinates.
          *
          * @param vlsr radial velocity of the source referred to the LSR in km/s
          * @param jd Epoch expressed as julian day to which the source coordinates refer to.
          * @return Radial velocity of the source referred to the barycenter of the solar system in km/s
          **/
     double vHeliocentric(double vlsr, long double jd);
 
     /** Computes the radial velocity of a source referred to the Local Standard of Rest, also known as VLSR
          * from the radial velocity referred to the solar system barycenter
          *
          * @param vhelio radial velocity of the source referred to the LSR in km/s
          * @param jd Epoch expressed as julian day to which the source coordinates refer to.
          * @return Radial velocity of the source referred to the barycenter of the solar system in km/s
          **/
     double vHelioToVlsr(double vhelio, long double jd);
 
     /** Computes the velocity of any object projected on the direction of the source.
          *  @param jd0 Julian day for which we compute the direction of the source
          *  @return velocity of the Earth projected on the direction of the source kms-1
          */
     double vREarth(long double jd0);
 
     /** Computes the radial velocity of a source referred to the center of the earth
          * from the radial velocity referred to the solar system barycenter
          *
          * @param vhelio radial velocity of the source referred to the barycenter of the
          *               solar system in km/s
          * @param jd     Epoch expressed as julian day to which the source coordinates refer to.
          * @return Radial velocity of the source referred to the center of the Earth in km/s
          **/
     double vGeocentric(double vhelio, long double jd);
 
     /** Computes the radial velocity of a source referred to the solar system barycenter
          * from the velocity referred to the center of the earth
          *
          * @param vgeo   radial velocity of the source referred to the center of the Earth
          *               [km/s]
          * @param jd     Epoch expressed as julian day to which the source coordinates refer to.
          * @return Radial velocity of the source referred to the solar system barycenter in km/s
          **/
     double vGeoToVHelio(double vgeo, long double jd);
 
     /** Computes the velocity of any object (oberver's site) projected on the
          * direction of the source.
          *  @param vsite velocity of that object in cartesian coordinates
          *  @return velocity of the object projected on the direction of the source kms-1
          */
     double vRSite(double vsite[3]);
 
     /** Computes the radial velocity of a source referred to the observer site on the surface
          * of the earth from the geocentric velovity and the velocity of the site referred to the center
          * of the Earth.
          *
          * @param vgeo radial velocity of the source referred to the center of the earth in km/s
          * @param vsite Velocity at which the observer moves referred to the center of the earth.
          * @return Radial velocity of the source referred to the observer's site in km/s
          **/
     double vTopocentric(double vgeo, double vsite[3]);
 
     /** Computes the radial velocity of a source referred to the center of the Earth from
          * the radial velocity referred to an observer site on the surface of the earth
          *
          * @param vtopo radial velocity of the source referred to the observer's site in km/s
          * @param vsite Velocity at which the observer moves referred to the center of the earth.
          * @return Radial velocity of the source referred the center of the earth in km/s
          **/
     double vTopoToVGeo(double vtopo, double vsite[3]);
 
     /** Find the SkyPoint obtained by moving distance dist
          * (arcseconds) away from the givenSkyPoint
          *
          * @param dist Distance to move through in arcseconds
          * @param from The SkyPoint to move away from
          * @return a SkyPoint that is at the dist away from this SkyPoint in the direction away from
          */
     SkyPoint moveAway(const SkyPoint &from, double dist) const;
 
     /**
          * @short Check if this point is circumpolar at the given geographic latitude
          */
     bool checkCircumpolar(const dms *gLat) const;
 
     /** Calculate refraction correction. Parameter and return value are in degrees */
     static double refractionCorr(double alt);
 
     /**
          * @short Apply refraction correction to altitude.
          * @param alt altitude to be corrected, in degrees
          * @return altitude after refraction correction, in degrees
          */
     static double refract(const double alt);
 
     /**
          * @short Remove refraction correction.
          * @param alt altitude from which refraction correction must be removed, in degrees
          * @return altitude without refraction correction, in degrees
          */
     static double unrefract(const double alt);
 
     /**
          * @short Apply refraction correction to altitude. Overloaded method using
          * dms provided for convenience
          * @see SkyPoint::refract( const double alt )
          */
     static inline dms refract(const dms alt) { return dms(refract(alt.Degrees())); }
 
     /**
          * @short Remove refraction correction. Overloaded method using
          * dms provided for convenience
          * @see SkyPoint::unrefract( const double alt )
          */
     static inline dms unrefract(const dms alt) { return dms(unrefract(alt.Degrees())); }
 
     /**
          * @short Compute the altitude of a given skypoint hour hours from the given date/time
          * @param p SkyPoint whose altitude is to be computed (const pointer, the method works on a clone)
          * @param dt Date/time that corresponds to 0 hour
          * @param geo GeoLocation object specifying the location
          * @param hour double specifying offset in hours from dt for which altitude is to be found
          * @return a dms containing (unrefracted?) altitude of the object at dt + hour hours at the given location
          * @note This method is used in multiple places across KStars
          * @todo Fix code duplication in AltVsTime and KSAlmanac by using this method instead! FIXME.
          */
     static dms findAltitude(const SkyPoint *p, const KStarsDateTime &dt, const GeoLocation *geo, const double hour = 0);
 
     /**
          * @short returns a time-transformed SkyPoint. See SkyPoint::findAltitude() for details
          * @todo Fix this documentation.
          */
     static SkyPoint timeTransformed(const SkyPoint *p, const KStarsDateTime &dt, const GeoLocation *geo,
                                     const double hour = 0);
 
     /**
          *@short Critical height for atmospheric refraction
          * corrections. Below this, the height formula produces meaningles
          * results and the correction value is just interpolated.
          */
     static const double altCrit;
 
     /**
          * @short Return the object's altitude at the upper culmination for the given latitude
          * @return the maximum altitude in degrees
          */
     double maxAlt(const dms &lat) const;
 
     /**
          * @short Return the object's altitude at the lower culmination for the given latitude
          * @return the minimum altitude in degrees
          */
     double minAlt(const dms &lat) const;
 
 #ifdef PROFILE_COORDINATE_CONVERSION
     static double cpuTime_EqToHz;
     static long unsigned eqToHzCalls;
 #endif
 
   protected:
     /**
          * Precess this SkyPoint's catalog coordinates to the epoch described by the
          * given KSNumbers object.
          * @param num pointer to a KSNumbers object describing the target epoch.
          */
     void precess(const KSNumbers *num);
 
 #ifdef UNIT_TEST
     friend class TestSkyPoint; // Test class
 #endif
 
   private:
     CachingDms RA0, Dec0; //catalog coordinates
     CachingDms RA, Dec;   //current true sky coordinates
     dms Alt, Az;
     static KSSun *m_Sun;
 
   protected:
     double lastPrecessJD; // JD at which the last coordinate update (see updateCoords) for this SkyPoint was done
 };
diff --git a/kstars/skyobjects/starobject.h b/kstars/skyobjects/starobject.h
index 9e22139fb..5e2da91a1 100644
--- a/kstars/skyobjects/starobject.h
+++ b/kstars/skyobjects/starobject.h
@@ -1,307 +1,307 @@
 /***************************************************************************
                           starobject.h  -  K Desktop Planetarium
                              -------------------
     begin                : Tue Sep 18 2001
     copyright            : (C) 2001 by Thomas Kabelmann
     email                : tk78@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 //#define PROFILE_UPDATECOORDS
 
 #include "skyobject.h"
 
 #include <QString>
 
 struct DeepStarData;
 class KSNumbers;
 class KSPopupMenu;
 struct StarData;
 
 /** @class StarObject
         *This is a subclass of SkyObject.  It adds the Spectral type, and flags
         *for variability and multiplicity.
         *For stars, the primary name (n) is the latin name (e.g., "Betelgeuse").  The
         *secondary name (n2) is the genetive name (e.g., "alpha Orionis").
         *@short subclass of SkyObject specialized for stars.
         *@author Thomas Kabelmann
         *@version 1.0
         */
 
 class StarObject : public SkyObject
 {
   public:
     /** @short returns the reindex interval (in centuries!) for the given
          * magnitude of proper motion (in milliarcsec/year).  ASSUMING a
          * 25 arc-minute margin for proper motion.
          */
     static double reindexInterval(double pm);
 
     /**
             *Constructor.  Sets sky coordinates, magnitude, latin name, genetive name, and
             *spectral type.
             *@param r Right Ascension
             *@param d Declination
             *@param m magnitude
             *@param n common name
             *@param n2 genetive name
             *@param sptype Spectral Type
             *@param pmra Proper motion in RA direction [mas/yr]
             *@param pmdec Proper motion in Dec direction [mas/yr]
             *@param par Parallax angle [mas]
             *@param mult Multiplicity flag (false=dingle star; true=multiple star)
             *@param var Variability flag (true if star is a known periodic variable)
             *@param hd Henry Draper Number
             */
     explicit StarObject(dms r = dms(0.0), dms d = dms(0.0), float m = 0.0, const QString &n = QString(),
                         const QString &n2 = QString(), const QString &sptype = "--", double pmra = 0.0,
                         double pmdec = 0.0, double par = 0.0, bool mult = false, bool var = false, int hd = 0);
     /**
             *Constructor.  Sets sky coordinates, magnitude, latin name, genetive name, and
             *spectral type.  Differs from above function only in data type of RA and Dec.
             *@param r Right Ascension
             *@param d Declination
             *@param m magnitude
             *@param n common name
             *@param n2 genetive name
             *@param sptype Spectral Type
             *@param pmra Proper motion in RA direction [mas/yr]
             *@param pmdec Proper motion in Dec direction [mas/yr]
             *@param par Parallax angle [mas]
             *@param mult Multiplicity flag (false=dingle star; true=multiple star)
             *@param var Variability flag (true if star is a known periodic variable)
             *@param hd Henry Draper Number
             */
     StarObject(double r, double d, float m = 0.0, const QString &n = QString(), const QString &n2 = QString(),
                const QString &sptype = "--", double pmra = 0.0, double pmdec = 0.0, double par = 0.0, bool mult = false,
                bool var = false, int hd = 0);
 
     StarObject *clone() const override;
     UID getUID() const override;
 
     /** Copy constructor */
     StarObject(const StarObject &o);
 
     /** Destructor. (Empty) */
     ~StarObject() override {}
 
     /**
          *@short  Initializes a StarObject to given data
          *
          * This is almost like the StarObject constructor itself, but it avoids
          * setting up name, gname etc for unnamed stars. If called instead of the
          * constructor, this method will be much faster for unnamed stars
          *
          *@param  stardata  Pointer to starData object containing required data (except name and gname)
          *@return Nothing
          */
     void init(const StarData *stardata);
 
     /**
          *@short  Initializes a StarObject to given data
          *
          *@param  stardata  Pointer to deepStarData object containing the available data
          *@return Nothing
          */
     void init(const DeepStarData *stardata);
 
     /**
          *@short  Sets the name, genetive name, and long name
          *
          *@param  name  Common name
          *@param  name2 Genetive name
          */
     void setNames(const QString &name, const QString &name2);
 
     /** @return true if the star has a name ("star" doesn't count) */
     inline bool hasName() const { return (!Name.isEmpty() && Name != starString); }
 
     /** @return true if the star has a latin name ("star" or HD... doesn't count) */
     inline bool hasLatinName() const
     {
         return (!Name.isEmpty() && Name != starString && Name != gname(false) && Name != gname(true) &&
                 !Name.startsWith("HD "));
     }
 
     /** If star is unnamed return "star" otherwise return the name */
     inline QString name(void) const override { return hasName() ? Name : starString; }
 
     /** If star is unnamed return "star" otherwise return the longname */
     inline QString longname(void) const override { return hasLongName() ? LongName : starString; }
 
     /** Returns entire spectral type string
          * @return Spectral Type string
          */
     QString sptype(void) const;
 
     /** Returns just the first character of the spectral type string. */
     char spchar() const;
 
     /** Returns the genetive name of the star.
          * @return genetive name of the star
          */
     QString gname(bool useGreekChars = true) const;
 
     /** Returns the greek letter portion of the star's genetive name.
          * Returns empty string if star has no genetive name defined.
          * @return greek letter portion of genetive name
          */
     QString greekLetter(bool useGreekChars = true) const;
 
     /** @return the genitive form of the star's constellation. */
     QString constell(void) const;
 
     /** Determine the current coordinates (RA, Dec) from the catalog
          * coordinates (RA0, Dec0), accounting for both precession and nutation.
          * @param num pointer to KSNumbers object containing current values of
          * time-dependent variables.
          * @param includePlanets does nothing in this implementation (see KSPlanetBase::updateCoords()).
          * @param lat does nothing in this implementation (see KSPlanetBase::updateCoords()).
          * @param LST does nothing in this implementation (see KSPlanetBase::updateCoords()).
          */
-    void updateCoords(const KSNumbers *num, bool includePlanets = true, const CachingDms *lat = 0,
-                      const CachingDms *LST = 0, bool forceRecompute = false) override;
+    void updateCoords(const KSNumbers *num, bool includePlanets = true, const CachingDms *lat = nullptr,
+                      const CachingDms *LST = nullptr, bool forceRecompute = false) override;
 
     /** @short fills ra and dec with the coordinates of the star with the proper
          * motion correction but without precesion and its friends.  It is used
          * in StarComponent to re-index all the stars.
          *
          * @return true if we changed the coordinates, false otherwise
          * NOTE: ra and dec both in degrees.
          */
     bool getIndexCoords(const KSNumbers *num, CachingDms &ra, CachingDms &dec);
     bool getIndexCoords(const KSNumbers *num, double *ra, double *dec);
 
     /** @short added for JIT updates from both StarComponent and ConstellationLines */
     void JITupdate();
 
     /** @short returns the magnitude of the proper motion correction in milliarcsec/year */
     inline double pmMagnitude() const
     {
         double cosDec = dec0().cos();
         return sqrt(cosDec * cosDec * pmRA() * pmRA() + pmDec() * pmDec());
     }
 
     /**
          *@short returns the square of the magnitude of the proper motion correction in (milliarcsec/year)^2
          *@note This method is faster when the square root need not be taken
          */
     inline double pmMagnitudeSquared() const
     {
         double metric_weighted_pmRA = dec0().cos() * pmRA();
         return (metric_weighted_pmRA * metric_weighted_pmRA + pmDec() * pmDec());
     }
 
     /** @short Set the Ra and Dec components of the star's proper motion, in milliarcsec/year.
          * Note that the RA component is multiplied by cos(dec).
          * @param pmra the new RA propoer motion
          * @param pmdec the new Dec proper motion
          */
     inline void setProperMotion(double pmra, double pmdec)
     {
         PM_RA  = pmra;
         PM_Dec = pmdec;
     }
 
     /** @return the RA component of the star's proper motion, in mas/yr (multiplied by cos(dec)) */
     inline double pmRA() const { return PM_RA; }
 
     /** @return the Dec component of the star's proper motion, in mas/yr */
     inline double pmDec() const { return PM_Dec; }
 
     /** @short set the star's parallax angle, in milliarcsec */
     inline void setParallax(double plx) { Parallax = plx; }
 
     /** @return the star's parallax angle, in milliarcsec */
     inline double parallax() const { return Parallax; }
 
     /** @return the star's distance from the Sun in parsecs, as computed from the parallax. */
     inline double distance() const { return 1000. / parallax(); }
 
     /** @short set the star's multiplicity flag (i.e., is it a binary or multiple star?)
          * @param m true if binary/multiple star system */
     inline void setMultiple(bool m) { Multiplicity = m; }
 
     /** @return whether the star is a binary or multiple starobject */
     inline bool isMultiple() const { return Multiplicity; }
 
     /** @return the star's HD index */
     inline int getHDIndex() const { return HD; }
 
     /** @short set the star's variability flag
             *@param v true if star is variable
             */
     inline void setVariable(bool v) { Variability = v; }
 
     /** @return whether the star is a binary or multiple starobject
             */
     inline bool isVariable() const { return Variability; }
 
     /** @short returns the name, the magnitude or both.
          */
     QString nameLabel(bool drawName, bool drawMag) const;
 
     QString labelString() const override;
 
     /**
          *@return the pixel distance for offseting the star's name label
          *This takes the zoom level and the star's brightness into account.
          */
     double labelOffset() const override;
 
     /**
          *@return the Visual magnitude of the star
          */
     inline float getVMag() const { return V; }
 
     /**
          *@return the blue magnitude of the star
          */
     inline float getBMag() const { return B; }
 
     /**
          *@return the B - V color index of the star, or a nonsense number
          *larger than 30 if it's not well defined
          */
     inline float getBVIndex() const { return ((B < 30.0 && V < 30.0) ? B - V : 99.9); }
 
     void initPopupMenu(KSPopupMenu *pmenu) override;
 
     quint64 updateID;
     quint64 updateNumID;
 
 #ifdef PROFILE_UPDATECOORDS
     static double updateCoordsCpuTime;
     static unsigned int starsUpdated;
 #endif
 
   protected:
     // DEBUG EDIT. For testing proper motion, uncomment this, and related blocks
     // See starobject.cpp for further info.
     //    static QVector<SkyPoint *> Trail;
     //    bool testStar;
     // END DEBUG
 
   private:
     double PM_RA { 0 };
     double PM_Dec { 0 };
     double Parallax { 0 };
     bool Multiplicity { false };
     bool Variability { false };
     char SpType[2];
     int HD { 0 };
     // B and V magnitudes, separately. NOTE 1) This is kept separate from mag for a reason.
     // See init( const DeepStarData *); 2) This applies only to deep stars at the moment
     float B { 0 };
     float V { 0 };
 };
diff --git a/kstars/skyobjects/trailobject.cpp b/kstars/skyobjects/trailobject.cpp
index 9f3d95c95..b62b995f0 100644
--- a/kstars/skyobjects/trailobject.cpp
+++ b/kstars/skyobjects/trailobject.cpp
@@ -1,144 +1,144 @@
 /***************************************************************************
                           trailobject.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Sat Oct 27 2007
     copyright            : (C) 2007 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "trailobject.h"
 
 #include "kstarsdata.h"
 #include "skymap.h"
 #ifndef KSTARS_LITE
 #include "kspopupmenu.h"
 #endif
 #include "skycomponents/skylabeler.h"
 #include "skypainter.h"
 #include "projections/projector.h"
 #include "Options.h"
 
 #include <QPainter>
 
 #include <typeinfo>
 
 QSet<TrailObject *> TrailObject::trailObjects;
 
 TrailObject::TrailObject(int t, dms r, dms d, float m, const QString &n) : SkyObject(t, r, d, m, n)
 {
 }
 
 TrailObject::TrailObject(int t, double r, double d, float m, const QString &n) : SkyObject(t, r, d, m, n)
 {
 }
 
 TrailObject::~TrailObject()
 {
     trailObjects.remove(this);
 }
 
 TrailObject *TrailObject::clone() const
 {
     Q_ASSERT(typeid(this) ==
              typeid(static_cast<const TrailObject *>(this))); // Ensure we are not slicing a derived class
     return new TrailObject(*this);
 }
 
 void TrailObject::updateTrail(dms *LST, const dms *lat)
 {
     for (int i = 0; i < Trail.size(); ++i)
         Trail[i].EquatorialToHorizontal(LST, lat);
 }
 
 void TrailObject::initPopupMenu(KSPopupMenu *pmenu)
 {
 #ifndef KSTARS_LITE
     pmenu->createPlanetMenu(this);
 #else
     Q_UNUSED(pmenu);
 #endif
 }
 
 void TrailObject::addToTrail(const QString &label)
 {
     Trail.append(SkyPoint(*this));
     m_TrailLabels.append(label);
     trailObjects.insert(this);
 }
 
 void TrailObject::clipTrail()
 {
     if (Trail.size())
     {
         Trail.removeFirst();
         Q_ASSERT(m_TrailLabels.size());
         m_TrailLabels.removeFirst();
     }
     if (Trail.size()) // Eh? Shouldn't this be if( !Trail.size() ) -- asimha
         trailObjects.remove(this);
 }
 
 void TrailObject::clearTrail()
 {
     Trail.clear();
     m_TrailLabels.clear();
     trailObjects.remove(this);
 }
 
 void TrailObject::clearTrailsExcept(SkyObject *o)
 {
-    TrailObject *keep = 0;
+    TrailObject *keep = nullptr;
     foreach (TrailObject *tr, trailObjects)
     {
         if (tr != o)
             tr->clearTrail();
         else
             keep = tr;
     }
 
     trailObjects = QSet<TrailObject *>();
     if (keep)
         trailObjects.insert(keep);
 }
 
 void TrailObject::drawTrail(SkyPainter *skyp) const
 {
     Q_UNUSED(skyp)
 #ifndef KSTARS_LITE
     if (!Trail.size())
         return;
 
     KStarsData *data = KStarsData::Instance();
 
     QColor tcolor = QColor(data->colorScheme()->colorNamed("PlanetTrailColor"));
     skyp->setPen(QPen(tcolor, 1));
     SkyLabeler *labeler = SkyLabeler::Instance();
     labeler->setPen(tcolor);
     int n = Trail.size();
     for (int i = 1; i < n; ++i)
     {
         if (Options::fadePlanetTrails())
         {
             tcolor.setAlphaF(static_cast<qreal>(i) / static_cast<qreal>(n));
             skyp->setPen(QPen(tcolor, 1));
         }
         SkyPoint a = Trail[i - 1];
         SkyPoint b = Trail[i];
         skyp->drawSkyLine(&a, &b);
         if (i % 5 == 1) // TODO: Make drawing of labels configurable, incl. frequency etc.
         {
             QPointF pt = SkyMap::Instance()->projector()->toScreen(&a);
             labeler->drawGuideLabel(pt, m_TrailLabels[i - 1], 0.0);
         }
     }
 #endif
 }
diff --git a/kstars/skypainter.h b/kstars/skypainter.h
index 60037be26..edaf8ae34 100644
--- a/kstars/skypainter.h
+++ b/kstars/skypainter.h
@@ -1,185 +1,185 @@
 /*
     SkyPainter: class for painting onto the sky for KStars
     Copyright (C) 2010 Henry de Valence <hdevalence@gmail.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License along
     with this program; if not, write to the Free Software Foundation, Inc.,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 */
 
 #pragma once
 
 #include <QList>
 #include <QPainter>
 
 #include "skycomponents/typedef.h"
 
 class ConstellationsArt;
 class DeepSkyObject;
 class KSComet;
 class KSPlanetBase;
 class LineList;
 class LineListLabel;
 class Satellite;
 class SkipHashList;
 class SkyMap;
 class SkyObject;
 class SkyPoint;
 class Supernova;
 
 /**
  * @short Draws things on the sky, without regard to backend.
  * This class serves as an interface to draw objects onto the sky without
  * worrying about whether we are using a QPainter or OpenGL.
  */
 class SkyPainter
 {
   public:
     /** @short Constructor. */
     SkyPainter();
 
     /** @short Destructor */
     virtual ~SkyPainter();
 
     /** @short Set the pen of the painter **/
     virtual void setPen(const QPen &pen) = 0;
 
     /** @short Set the brush of the painter **/
     virtual void setBrush(const QBrush &brush) = 0;
 
     //FIXME: find a better way to do this.
     void setSizeMagLimit(float sizeMagLim);
 
     /**
      * Begin painting.
      * @note this function <b>must</b> be called before painting anything.
      * @see end()
      */
     virtual void begin() = 0;
 
     /**
      * End and finalize painting.
      * @note this function <b>must</b> be called after painting anything.
      * @note it is not guaranteed that anything will actually be drawn until end() is called.
      * @see begin();
      */
     virtual void end() = 0;
 
     ////////////////////////////////////
     //                                //
     // SKY DRAWING FUNCTIONS:         //
     //                                //
     ////////////////////////////////////
 
     /** @short Draw the sky background */
     virtual void drawSkyBackground() = 0;
 
     /**
      * @short Draw a line between points in the sky.
      * @param a the first point
      * @param b the second point
      * @note this function will skip lines not on screen and clip lines
      * that are only partially visible.
      */
     virtual void drawSkyLine(SkyPoint *a, SkyPoint *b) = 0;
 
     /**
      * @short Draw a polyline in the sky.
      * @param list a list of points in the sky
      * @param skipList a SkipList object used to control skipping line segments
      * @param label a pointer to the label for this line
      * @note it's more efficient to use this than repeated calls to drawSkyLine(),
      * because it avoids an extra points->size() -2 projections.
      */
-    virtual void drawSkyPolyline(LineList *list, SkipHashList *skipList = 0, LineListLabel *label = 0) = 0;
+    virtual void drawSkyPolyline(LineList *list, SkipHashList *skipList = nullptr, LineListLabel *label = nullptr) = 0;
 
     /**
      * @short Draw a polygon in the sky.
      * @param list a list of points in the sky
      * @param forceClip If true (default), it enforces clipping of the polygon, otherwise, it draws the
      * complete polygen without running any boundary checks.
      * @see drawSkyPolyline()
      */
     virtual void drawSkyPolygon(LineList *list, bool forceClip = true) = 0;
 
     /**
      * @short Draw a comet in the sky.
      * @param com comet to draw
      * @return true if a comet was drawn
      */
     virtual bool drawComet(KSComet *com) = 0;
 
     /**
      * @short Draw a point source (e.g., a star).
      * @param loc the location of the source in the sky
      * @param mag the magnitude of the source
      * @param sp the spectral class of the source
      * @return true if a source was drawn
      */
     virtual bool drawPointSource(SkyPoint *loc, float mag, char sp = 'A') = 0;
 
     /**
      * @short Draw a deep sky object
      * @param obj the object to draw
      * @param drawImage if true, try to draw the image of the object
      * @return true if it was drawn
      */
     virtual bool drawDeepSkyObject(DeepSkyObject *obj, bool drawImage = false) = 0;
 
     /**
      * @short Draw a planet
      * @param planet the planet to draw
      * @return true if it was drawn
      */
     virtual bool drawPlanet(KSPlanetBase *planet) = 0;
 
     /**
      * @short Draw the symbols for the observing list
      * @param obs the oberving list
      */
     virtual void drawObservingList(const QList<SkyObject *> &obs) = 0;
 
     /** @short Draw flags */
     virtual void drawFlags() = 0;
 
     /** @short Draw a satellite */
     virtual bool drawSatellite(Satellite *sat) = 0;
 
     /** @short Draw a Supernova */
     virtual bool drawSupernova(Supernova *sup) = 0;
 
-    virtual void drawHorizon(bool filled, SkyPoint *labelPoint = 0, bool *drawLabel = 0) = 0;
+    virtual void drawHorizon(bool filled, SkyPoint *labelPoint = nullptr, bool *drawLabel = nullptr) = 0;
 
     /** @short Get the width of a star of magnitude mag */
     float starWidth(float mag) const;
 
     /**
      * @short Draw a ConstellationsArt object
      * @param obj the object to draw
      * @return true if it was drawn
      */
     virtual bool drawConstellationArtImage(ConstellationsArt *obj) = 0;
 
     /**
      * @brief drawHips Draw HIPS all sky catalog
      * @return true if it was drawn
      */
     virtual bool drawHips() = 0;
 
   protected:
     SkyMap *m_sm { nullptr };
 
   private:
     float m_sizeMagLim;
 };
diff --git a/kstars/texturemanager.h b/kstars/texturemanager.h
index 6704557b4..42475d5b0 100644
--- a/kstars/texturemanager.h
+++ b/kstars/texturemanager.h
@@ -1,76 +1,76 @@
 /*
     Copyright (C) 2010 Henry de Valence <hdevalence@gmail.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License along
     with this program; if not, write to the Free Software Foundation, Inc.,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 */
 
 #pragma once
 
 #include <QObject>
 #include <QHash>
 
 #include <config-kstars.h>
 
 class QGLWidget;
 class QImage;
 
 /**
  * @brief a singleton class to manage texture loading/retrieval
  */
 class TextureManager : public QObject
 {
     Q_OBJECT
   public:
     /** @short Create the instance of TextureManager */
     static TextureManager *Create();
     /** @short Release the instance of TextureManager */
     static void Release();
 
     /**
      * Return texture image. If image is not found in cache tries to
      * load it from disk if that fails too returns reference to empty image.
      */
     static const QImage &getImage(const QString &name);
 
 #ifdef HAVE_OPENGL
     /**
      *  Bind OpenGL texture. Acts similarly to getImage but does
      *  nothing if image is not found in the end
      */
     static void bindTexture(const QString &name, QGLWidget *cxt);
 
     /** Bind OpenGL texture using QImage as source */
     static void bindFromImage(const QImage &image, QGLWidget *cxt);
 #endif
 
   private:
     /** Shorthand for iterator to hashtable */
     typedef QHash<QString, QImage>::const_iterator CacheIter;
 
     /** Private constructor */
-    explicit TextureManager(QObject *parent = 0);
+    explicit TextureManager(QObject *parent = nullptr);
     /** Try find image in the cache and then to load it from disk if it's not found */
     static CacheIter findTexture(const QString &name);
 
     // Pointer to singleton instance
     static TextureManager *m_p;
     // List of named textures
     QHash<QString, QImage> m_textures;
 
     // Prohibit copying
     TextureManager(const TextureManager &);
     TextureManager &operator=(const TextureManager &);
 };
diff --git a/kstars/time/simclock.h b/kstars/time/simclock.h
index 4c8c5813c..27def1218 100644
--- a/kstars/time/simclock.h
+++ b/kstars/time/simclock.h
@@ -1,151 +1,151 @@
 /***************************************************************************
                           simclock.h  -  description
                              -------------------
     begin                : Mon Feb 18 2002
     copyright          : (C) 2002 by Mark Hollomon
     email                : mhh@mindspring.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "kstarsdatetime.h"
 
 #ifndef KSTARS_LITE
 #include <QtDBus/QtDBus>
 #endif
 #include <QTime>
 #include <QTimer>
 
 /** @class SimClock
 	*@short kstars simulation clock
 	*@author Mark Hollomon
 	*@version 1.0
 	*/
 
 class SimClock : public QObject
 {
     Q_OBJECT
     Q_CLASSINFO("D-Bus Interface", "org.kde.kstars.SimClock")
   public:
     /**
          * Constructor
          * @param parent parent object for the clock
          * @param when the date/time to which the SimClock should be initialized in UTC
          */
-    explicit SimClock(QObject *parent = 0, const KStarsDateTime &when = KStarsDateTime::currentDateTimeUtc());
+    explicit SimClock(QObject *parent = nullptr, const KStarsDateTime &when = KStarsDateTime::currentDateTimeUtc());
 
     /** @return const reference to the current simulation Universal Time. */
     const KStarsDateTime &utc() const { return UTC; }
 
     /** Whether the clock is active or not is a bit complicated by the
         	*introduction of "manual mode".  In manual mode, SimClock's internal timer
         	*is stopped, because the clock is ticked manually when the current update
         	*has finished.  So, if ManualMode is true, then isActive() checks
         	*whether ManualActive is true.  Otherwise, it checks whether the timer is
         	*running.
         	*@returns true if the Simulation clock is actively running.
         	*/
     Q_INVOKABLE bool isActive();
 
     /** @returns the current timestep setting */
     double scale() const { return Scale; }
 
     /** Manual Mode is a new (04/2002) addition to the SimClock.  It is
         	*intended to be activated for large timesteps, when we want each frame
         	*drawn to the screen to be precisely Scale seconds later than the
         	*previous frame.  (i.e., if the timescale is 1 year, then each successive
         	*frame should be 1 year later than the previous frame).  ManualMode
         	*accomplishes this by stopping the internal timer and allowing the clock
         	*to be advanced manually (the manualTick() slot is called at the end of each
         	*KStars::updateTime()).
         	*@returns whether Manual Mode is active.
         	*/
     bool isManualMode() const { return ManualMode; }
 
     /**Sets Manual Mode on/off according to the bool argument. */
     void setManualMode(bool on = true);
 
   public Q_SLOTS:
 #ifndef KSTARS_LITE
     /** DBUS function to stop the SimClock. */
     Q_SCRIPTABLE Q_NOREPLY void stop();
 
     /** DBUS function to start the SimClock. */
     Q_SCRIPTABLE Q_NOREPLY void start();
 
     /** DBUS function to set the time of the SimClock. */
     Q_SCRIPTABLE Q_NOREPLY void setUTC(const KStarsDateTime &newtime);
 
     /** DBUS function to set scale of simclock. */
     Q_SCRIPTABLE Q_NOREPLY void setClockScale(float s);
 #else
     // Define non-DBUS versions of functions above for use within KStarsLite
     /** Function to stop the SimClock. */
     void stop();
 
     /** Function to start the SimClock. */
     void start();
 
     /** Function to set the time of the SimClock. */
     void setUTC(const KStarsDateTime &newtime);
 
     /** Function to set scale of simclock. */
     void setClockScale(float s);
 #endif
 
     /** Respond to the QTimer::timeout signal */
     void tick();
 
     /** Equivalent of tick() for manual mode.
          * If ManualActive is true, add Scale seconds to the SimClock time.
          * (we may want to modify this slightly...e.g., the number of seconds in a
          * year is not constant (leap years), so it is better to increment the
          * year, instead of adding 31 million seconds.
          * set backward to true to reverse sign of Scale value
    */
 
     void manualTick(bool force = false, bool backward = false);
 
   signals:
     /** The time has changed (emitted by setUTC() ) */
     void timeChanged();
 
     /** The clock has ticked (emitted by tick() )*/
     void timeAdvanced();
 
     /** The timestep has changed*/
     void scaleChanged(float);
 
     /** This is an signal that is called on either clock start or
             clock stop with an appropriate boolean argument. Required so
             that we can bind it to KToggleAction::slotToggled(bool) */
     void clockToggled(bool);
 
   private:
     long double julianmark { 0 };
     KStarsDateTime UTC;
     QTimer tmr;
     double Scale { 1 };
     QTime sysmark;
     int lastelapsed { 0 };
     bool ManualMode { false };
     bool ManualActive { false };
 
     // used to generate names for dcop interfaces
     //static int idgen;
     // how often to update
     static int TimerInterval;
 
     // Disallow copying
     SimClock(const SimClock &);
     SimClock &operator=(const SimClock &);
 };
diff --git a/kstars/tools/adddeepskyobject.cpp b/kstars/tools/adddeepskyobject.cpp
index ace18f8e9..0f6b0fcdc 100644
--- a/kstars/tools/adddeepskyobject.cpp
+++ b/kstars/tools/adddeepskyobject.cpp
@@ -1,391 +1,391 @@
 /***************************************************************************
                 adddeepskyobject.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Wed 17 Aug 2016 20:22:58 CDT
     copyright            : (c) 2016 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
 ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "adddeepskyobject.h"
 
 #include "syncedcatalogcomponent.h"
 #include "skyobjects/skyobject.h"
 
 #include <KMessageBox>
 
 #include <QInputDialog>
 #include <QRegularExpression>
 
 AddDeepSkyObject::AddDeepSkyObject(QWidget *parent, SyncedCatalogComponent *catalog)
     : QDialog(parent), m_catalog(catalog), ui(new Ui::AddDeepSkyObject)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     Q_ASSERT(catalog);
     ui->setupUi(this);
 
     // Set up various things in the dialog so it is ready to be shown
     for (int k = 0; k < SkyObject::NUMBER_OF_KNOWN_TYPES; ++k)
     {
         ui->typeComboBox->addItem(SkyObject::typeName(k));
     }
 
     ui->typeComboBox->addItem(SkyObject::typeName(SkyObject::TYPE_UNKNOWN));
     ui->catalogNameEdit->setEnabled(false);
     ui->catalogNameEdit->setText(catalog->name());
     ui->raInput->setDegType(false);
 
     resetView();
 
     // Connections
     //    connect(ui->buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
     connect(ui->buttonBox, SIGNAL(accepted()), this, SLOT(slotOk()));
     QAbstractButton *resetButton = ui->buttonBox->button(QDialogButtonBox::Reset);
     connect(resetButton, SIGNAL(clicked()), this, SLOT(resetView()));
     connect(ui->fillFromTextButton, SIGNAL(clicked()), this, SLOT(slotFillFromText()));
 
     // Show the UI
     show();
 }
 
 AddDeepSkyObject::~AddDeepSkyObject()
 {
     delete ui;
 }
 
 void AddDeepSkyObject::fillFromText(const QString &text)
 {
     // Parse text to fill in the options
 
     // TODO: Add code to match and guess object type, to match blue magnitude.
 
     QRegularExpression matchJ2000Line("^(.*)(?:J2000|ICRS|FK5|\\(2000(?:\\.0)?\\))(.*)$");
     matchJ2000Line.setPatternOptions(QRegularExpression::MultilineOption);
     QRegularExpression matchCoords("(?:^|[^-\\d])([-+]?\\d\\d?)(?:h ?|d ?|[^\\d]?° ?|:| +)(\\d\\d)(?:m ?|\' ?|’ ?|′ "
                                    "?|:| +)(\\d\\d(?:\\.\\d+)?)?(?:s|\"|\'\'|”|″)?\\b");
     QRegularExpression matchCoords2("J?\\d{6,6}[-+]\\d{6,6}");
     QRegularExpression findMag1(
         "(?:[mM]ag(?:nitudes?)?\\s*(?:\\([vV]\\))?|V(?=\\b))(?:\\s*=|:)?\\s*(-?\\d{1,2}(?:\\.\\d{1,3})?)");
     QRegularExpression findMag2("\\b-?\\d{1,2}(\\.\\d{1,3})?\\s*[mM]ag\\b");
     QRegularExpression findSize1("\\b(\\d{1,3}(?:\\.\\d{1,2})?)\\s*(°|\'|\"|\'\')?\\s*[xX×]\\s*(\\d{1,3}(?:\\.\\d{1,2})"
                                  "?)\\s*(°|\'|\"|\'\')?\\b");
     QRegularExpression findSize2("\\b(?:[Ss]ize|[Dd]imensions?|[Dd]iameter)[: "
                                  "](?:\\([vV]\\))?\\s*(\\d{1,3}(?:\\.\\d{1,2})?)\\s*(°|\'|\"|\'\')?\\b");
     QRegularExpression findMajorAxis("\\b[Mm]ajor\\s*[Aa]xis:?\\s*(\\d{1,3}(?:\\.\\d{1,2})?)\\s*(°|\'|\"|\'\')?\\b");
     QRegularExpression findMinorAxis("\\b[Mm]inor\\s*[Aa]xis:?\\s*(\\d{1,3}(?:\\.\\d{1,2})?)\\s*(°|\'|\"|\'\')?\\b");
     QRegularExpression findPA(
         "\\b(?:[Pp]osition *[Aa]ngle|PA|[pP]\\.[aA]\\.):?\\s*(\\d{1,3}(\\.\\d{1,2})?)(?:°|[Ddeg])?\\b");
     QRegularExpression findName1(
         "\\b(?:(?:[nN]ames?|NAMES?)[: ]|[iI]dent(?:ifier)?:|[dD]esignation:)\\h*\"?([-+\'A-Za-z0-9 ]*)\"?\\b");
     QStringList catalogNames;
     catalogNames << "NGC"
                  << "IC"
                  << "M"
                  << "PGC"
                  << "UGC"
                  << "UGCA"
                  << "MCG"
                  << "ESO"
                  << "SDSS"
                  << "LEDA"
                  << "IRAS"
                  << "PNG"
                  << "Abell"
                  << "ACO"
                  << "HCG"
                  << "CGCG"
                  << "[IV]+Zw"
                  << "Hickson"
                  << "AGC"
                  << "2MASS"
                  << "RCS2"
                  << "Terzan"
                  << "PN [A-Z0-9]"
                  << "VV"
                  << "PK"
                  << "GSC2"
                  << "LBN"
                  << "LDN"
                  << "Caldwell"
                  << "HIP"
                  << "AM"
                  << "vdB"
                  << "Barnard"
                  << "Shk";
     QRegularExpression findName2("\\b(" + catalogNames.join("|") + ")\\s+(J?[-+0-9\\.]+[A-Da-h]?)\\b");
     QRegularExpression findName3("\\b([A-Za-z]+[0-9]?)\\s+(J?[-+0-9]+[A-Da-h]?)\\b");
 
     QString coordText;
     bool coordsFound = false, magFound = false, sizeFound = false, nameFound = false, positionAngleFound = false;
     dms RA, Dec;
     float mag           = NaN::f;
     float majorAxis     = NaN::f;
     float minorAxis     = NaN::f;
     float positionAngle = 0;
     QString name;
 
     // Note: The following method is a proxy to support older versions of Qt.
     // In Qt 5.5 and above, the QString::indexOf(const QRegularExpression &re, int from, QRegularExpressionMatch *rmatch) method obviates the need for the following.
     auto indexOf = [](const QString &s, const QRegularExpression &regExp, int from, QRegularExpressionMatch *m) -> int {
         *m = regExp.match(s, from);
         return m->capturedStart(0);
     };
 
     auto countNonOverlappingMatches = [indexOf](const QString &string, const QRegularExpression &regExp,
-                                                QStringList *list = 0) -> int {
+                                                QStringList *list = nullptr) -> int {
         int count           = 0;
         int matchIndex      = -1;
         int lastMatchLength = 1;
         QRegularExpressionMatch rmatch;
         while ((matchIndex = indexOf(string, regExp, matchIndex + lastMatchLength, &rmatch)) >= 0)
         {
             ++count;
             lastMatchLength = rmatch.captured(0).length();
             if (list)
                 list->append(rmatch.captured(0));
         }
         return count;
     };
 
     QRegularExpressionMatch rmatch;
     int nonOverlappingMatchCount;
     if ((nonOverlappingMatchCount = countNonOverlappingMatches(text, matchCoords)) == 2)
     {
         coordText = text;
     }
     else if (nonOverlappingMatchCount > 2)
     {
         qDebug() << "Found more than 2 coordinate matches. Trying to match J2000 line.";
         if (indexOf(text, matchJ2000Line, 0, &rmatch) >= 0)
         {
             coordText = rmatch.captured(1) + rmatch.captured(2);
             qDebug() << "Found a J2000 line match: " << coordText;
         }
     }
     if (!coordText.isEmpty())
     {
 //        int coord1 = indexOf(coordText, matchCoords, 0, &rmatch);
 //        Q_ASSERT(coord1 >= 0);
         RA         = dms(rmatch.captured(1) + ' ' + rmatch.captured(2) + ' ' + rmatch.captured(3), false);
 //        int coord2 = indexOf(coordText, matchCoords, coord1 + rmatch.captured(0).length(), &rmatch);
 //        Q_ASSERT(coord2 >= 0);
         Dec = dms(rmatch.captured(1) + ' ' + rmatch.captured(2) + ' ' + rmatch.captured(3), true);
         qDebug() << "Extracted coordinates: " << RA.toHMSString() << " " << Dec.toDMSString();
         coordsFound = true;
     }
     else
     {
         if (text.contains(matchCoords2, &rmatch))
         {
             QString matchString = rmatch.captured(0);
             QRegularExpression extractCoords2("(\\d\\d)(\\d\\d)(\\d\\d)([-+]\\d\\d)(\\d\\d)(\\d\\d)");
             Q_ASSERT(matchString.contains(extractCoords2, &rmatch));
             RA          = dms(rmatch.captured(1) + ' ' + rmatch.captured(2) + ' ' + rmatch.captured(3), false);
             Dec         = dms(rmatch.captured(4) + ' ' + rmatch.captured(5) + ' ' + rmatch.captured(6), true);
             coordsFound = true;
         }
         else
         {
             QStringList matches;
             qDebug() << "Could not extract RA/Dec. Found " << countNonOverlappingMatches(text, matchCoords, &matches)
                      << " coordinate matches:";
             qDebug() << matches;
         }
     }
 
     nameFound = true;
     if (text.contains(findName1, &rmatch)) // Explicit name search
     {
         qDebug() << "Found explicit name field: " << rmatch.captured(1) << " in text " << rmatch.captured(0);
         name = rmatch.captured(1);
     }
     else if (text.contains(findName2, &rmatch))
     {
         qDebug() << "Found known catalog field: " << (name = rmatch.captured(1) + ' ' + rmatch.captured(2))
                  << " in text " << rmatch.captured(0);
     }
     else if (text.contains(findName3, &rmatch))
     {
         qDebug() << "Found something that looks like a catalog designation: "
                  << (name = rmatch.captured(1) + ' ' + rmatch.captured(2)) << " in text " << rmatch.captured(0);
     }
     else
     {
         qDebug() << "Could not find name.";
         nameFound = false;
     }
 
     magFound = true;
     if (text.contains(findMag1, &rmatch))
     {
         qDebug() << "Found magnitude: " << rmatch.captured(1) << " in text " << rmatch.captured(0);
         mag = rmatch.captured(1).toFloat();
     }
     else if (text.contains(findMag2, &rmatch))
     {
         qDebug() << "Found magnitude: " << rmatch.captured(1) << " in text " << rmatch.captured(0);
         mag = rmatch.captured(1).toFloat();
     }
     else
     {
         qDebug() << "Could not find magnitude.";
         magFound = false;
     }
 
     sizeFound = true;
     if (text.contains(findSize1, &rmatch))
     {
         qDebug() << "Found size: " << rmatch.captured(1) << " x " << rmatch.captured(3) << " with units "
                  << rmatch.captured(4) << " in text " << rmatch.captured(0);
         majorAxis = rmatch.captured(1).toFloat();
         QString unitText2;
         if (rmatch.captured(2).isEmpty())
         {
             unitText2 = rmatch.captured(4);
         }
         else
         {
             unitText2 = rmatch.captured(2);
         }
 
         if (unitText2.contains("°"))
             majorAxis *= 60;
         else if (unitText2.contains("\"") || unitText2.contains("\'\'"))
             majorAxis /= 60;
 
         minorAxis = rmatch.captured(3).toFloat();
         if (rmatch.captured(4).contains("°"))
             minorAxis *= 60;
         else if (rmatch.captured(4).contains("\"") || rmatch.captured(4).contains("\'\'"))
             minorAxis /= 60;
         qDebug() << "Major axis = " << majorAxis << "; minor axis = " << minorAxis << " in arcmin";
     }
     else if (text.contains(findSize2, &rmatch))
     {
         majorAxis = rmatch.captured(1).toFloat();
         if (rmatch.captured(2).contains("°"))
             majorAxis *= 60;
         else if (rmatch.captured(2).contains("\"") || rmatch.captured(2).contains("\'\'"))
             majorAxis /= 60;
         minorAxis = majorAxis;
     }
     else if (text.contains(findMajorAxis, &rmatch))
     {
         majorAxis = rmatch.captured(1).toFloat();
         if (rmatch.captured(2).contains("°"))
             majorAxis *= 60;
         else if (rmatch.captured(2).contains("\"") || rmatch.captured(2).contains("\'\'"))
             majorAxis /= 60;
         minorAxis = majorAxis;
         if (text.contains(findMinorAxis, &rmatch))
         {
             minorAxis = rmatch.captured(1).toFloat();
             if (rmatch.captured(2).contains("°"))
                 minorAxis *= 60;
             else if (rmatch.captured(2).contains("\"") || rmatch.captured(2).contains("\'\'"))
                 minorAxis /= 60;
         }
     }
 
     else
     {
         qDebug()
             << "Could not find size."; // FIXME: Improve to include separate major and minor axis matches, and size matches for round objects.
         sizeFound = false;
     }
 
     positionAngleFound = true;
     if (text.contains(findPA, &rmatch))
     {
         qDebug() << "Found position angle: " << rmatch.captured(1) << " in text " << rmatch.captured(0);
         positionAngle = rmatch.captured(1).toFloat();
     }
     else
     {
         qDebug() << "Could not find position angle.";
         positionAngleFound = false;
     }
 
     if (nameFound)
         ui->longNameEdit->setText(name);
     if (magFound)
         ui->visualMagnitudeInput->setValue(mag); // Improve band identification (V vs. B)
     if (coordsFound)
     {
         ui->raInput->setDMS(RA.toHMSString());
         ui->decInput->setDMS(Dec.toDMSString());
     }
     if (positionAngleFound)
         ui->positionAngleInput->setValue(positionAngle);
     if (sizeFound)
     {
         ui->majorAxisInput->setValue(majorAxis);
         ui->minorAxisInput->setValue(minorAxis);
     }
 }
 
 void AddDeepSkyObject::resetView()
 {
     ui->actualTypeDisplay->setText(SkyObject::typeName(SkyObject::TYPE_UNKNOWN));
     ui->catalogIDInput->setValue(m_catalog->objectList().count());
     ui->blueMagnitudeInput->setValue(99.99);
     ui->visualMagnitudeInput->setValue(99.99);
     ui->typeComboBox->setCurrentIndex(ui->typeComboBox->count() - 1);
     ui->majorAxisInput->setValue(0.0);
     ui->minorAxisInput->setValue(0.0);
     ui->positionAngleInput->setValue(0.0);
     ui->longNameEdit->setText(QString());
     ui->raInput->setDMS(QString());
     ui->decInput->setDMS(QString());
 }
 
 bool AddDeepSkyObject::slotOk()
 {
     // Formulate a CatalogEntryData object
     CatalogEntryData centry;
     bool ok;
 
     centry.magnitude      = ui->visualMagnitudeInput->value();
     centry.flux           = ui->blueMagnitudeInput->value();
     centry.ra             = ui->raInput->createDms(false, &ok).Degrees();
     centry.dec            = ui->decInput->createDms(true, &ok).Degrees();
     centry.major_axis     = ui->majorAxisInput->value();
     centry.minor_axis     = ui->minorAxisInput->value();
     centry.long_name      = ui->longNameEdit->text();
     centry.type           = ui->typeComboBox->currentIndex();
     centry.position_angle = ui->positionAngleInput->value();
     if (centry.type == ui->typeComboBox->count() - 1)
         centry.type = SkyObject::TYPE_UNKNOWN;
 
     // Insert it into the catalog
     bool success = m_catalog->addObject(centry);
 
     if (!success)
     {
         // Display error message
-        KMessageBox::sorry(0, i18n("Could not add deep-sky object. See console for error message!"),
+        KMessageBox::sorry(nullptr, i18n("Could not add deep-sky object. See console for error message!"),
                            i18n("Add deep-sky object"));
     }
     // Accept the dialog
 
     return success;
 }
 
 void AddDeepSkyObject::slotFillFromText()
 {
     bool ok      = false;
     QString text = QInputDialog::getMultiLineText(this, i18n("Add deep-sky object : enter text"),
                                                   i18n("Enter the data to guess parameters from:"), QString(), &ok);
     if (ok)
         fillFromText(text);
 }
diff --git a/kstars/tools/altvstime.cpp b/kstars/tools/altvstime.cpp
index 56ea62bc4..bdd48a2a9 100644
--- a/kstars/tools/altvstime.cpp
+++ b/kstars/tools/altvstime.cpp
@@ -1,1520 +1,1520 @@
 /***************************************************************************
                           altvstime.cpp  -  description
                              -------------------
     begin                : wed nov 17 08:05:11 CET 2002
     copyright            : (C) 2002-2003 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "altvstime.h"
 
 #include "avtplotwidget.h"
 #include "dms.h"
 #include "ksalmanac.h"
 #include "kstarsdata.h"
 #include "kstarsdatetime.h"
 #include "ksnumbers.h"
 #include "simclock.h"
 #include "kssun.h"
 #include "dialogs/finddialog.h"
 #include "dialogs/locationdialog.h"
 #include "geolocation.h"
 #include "skyobjects/skypoint.h"
 #include "skyobjects/skyobject.h"
 #include "skyobjects/starobject.h"
 
 #include <KLocalizedString>
 #include <kplotwidget.h>
 
 #include <QVBoxLayout>
 #include <QFrame>
 #include <QDialog>
 #include <QPainter>
 #include <QtPrintSupport/QPrinter>
 #include <QtPrintSupport/QPrintDialog>
 
 #include "kstars_debug.h"
 
 AltVsTimeUI::AltVsTimeUI(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 AltVsTime::AltVsTime(QWidget *parent) : QDialog(parent)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
 
     setWindowTitle(i18n("Altitude vs. Time"));
 
     setModal(false);
 
     QVBoxLayout *topLayout = new QVBoxLayout;
     setLayout(topLayout);
     topLayout->setMargin(0);
     avtUI = new AltVsTimeUI(this);
 
     // Layers for setting up the plot's priority: the current curve should be above the other curves.
     // The Rise/Set/Transit markers should be on top, with highest priority.
     avtUI->View->addLayer("currentCurveLayer", avtUI->View->layer("main"), QCustomPlot::limAbove);
     avtUI->View->addLayer("markersLayer", avtUI->View->layer("currentCurveLayer"), QCustomPlot::limAbove);
 
     // Set up the Graph Window:
     avtUI->View->setBackground(QBrush(QColor(0, 0, 0)));
     avtUI->View->xAxis->grid()->setVisible(false);
     avtUI->View->yAxis->grid()->setVisible(false);
     QColor axisColor(Qt::white);
     QPen axisPen(axisColor, 1);
     avtUI->View->xAxis->setBasePen(axisPen);
     avtUI->View->xAxis->setTickPen(axisPen);
     avtUI->View->xAxis->setSubTickPen(axisPen);
     avtUI->View->xAxis->setTickLabelColor(axisColor);
     avtUI->View->xAxis->setLabelColor(axisColor);
 
     avtUI->View->xAxis2->setBasePen(axisPen);
     avtUI->View->xAxis2->setTickPen(axisPen);
     avtUI->View->xAxis2->setSubTickPen(axisPen);
     avtUI->View->xAxis2->setTickLabelColor(axisColor);
     avtUI->View->xAxis2->setLabelColor(axisColor);
 
     avtUI->View->yAxis->setBasePen(axisPen);
     avtUI->View->yAxis->setTickPen(axisPen);
     avtUI->View->yAxis->setSubTickPen(axisPen);
     avtUI->View->yAxis->setTickLabelColor(axisColor);
     avtUI->View->yAxis->setLabelColor(axisColor);
 
     avtUI->View->yAxis2->setBasePen(axisPen);
     avtUI->View->yAxis2->setTickPen(axisPen);
     avtUI->View->yAxis2->setSubTickPen(axisPen);
     avtUI->View->yAxis2->setTickLabelColor(axisColor);
     avtUI->View->yAxis2->setLabelColor(axisColor);
 
     // give the axis some labels:
     avtUI->View->xAxis2->setLabel("Local Sidereal Time");
     avtUI->View->xAxis2->setVisible(true);
     avtUI->View->yAxis2->setVisible(true);
     avtUI->View->yAxis2->setTickLength(0, 0);
     avtUI->View->xAxis->setLabel("Local Time");
     avtUI->View->yAxis->setLabel("Altitude");
     avtUI->View->xAxis->setRange(43200, 129600);
     avtUI->View->xAxis2->setRange(61200, 147600);
 
     // configure the bottom axis to show time instead of number:
     QSharedPointer<QCPAxisTickerTime> xAxisTimeTicker(new QCPAxisTickerTime);
     xAxisTimeTicker->setTimeFormat("%h:%m");
     xAxisTimeTicker->setTickCount(12);
     xAxisTimeTicker->setTickStepStrategy(QCPAxisTicker::tssReadability);
     xAxisTimeTicker->setTickOrigin(Qt::UTC);
     avtUI->View->xAxis->setTicker(xAxisTimeTicker);
 
     // configure the top axis to show time instead of number:
     QSharedPointer<QCPAxisTickerTime> xAxis2TimeTicker(new QCPAxisTickerTime);
     xAxis2TimeTicker->setTimeFormat("%h:%m");
     xAxis2TimeTicker->setTickCount(12);
     xAxis2TimeTicker->setTickStepStrategy(QCPAxisTicker::tssReadability);
     xAxis2TimeTicker->setTickOrigin(Qt::UTC);
     avtUI->View->xAxis2->setTicker(xAxis2TimeTicker);
 
     // set up the Zoom/Pan features for the Top X Axis
     avtUI->View->axisRect()->setRangeDragAxes(avtUI->View->xAxis2, avtUI->View->yAxis);
     avtUI->View->axisRect()->setRangeZoomAxes(avtUI->View->xAxis2, avtUI->View->yAxis);
 
     // set up the margins, for a nice view
     avtUI->View->axisRect()->setAutoMargins(QCP::msBottom | QCP::msLeft | QCP::msTop);
     avtUI->View->axisRect()->setMargins(QMargins(0, 0, 7, 0));
 
     // set up the interaction set:
     avtUI->View->setInteraction(QCP::iRangeZoom, true);
     avtUI->View->setInteraction(QCP::iRangeDrag, true);
 
     // set up the selection tolerance for checking if a certain graph is or not selected:
     avtUI->View->setSelectionTolerance(5);
 
     // draw the gradient:
     drawGradient();
 
     // set up the background image:
     background = new QCPItemPixmap(avtUI->View);
     background->setPixmap(*gradient);
     background->topLeft->setType(QCPItemPosition::ptPlotCoords);
     background->bottomRight->setType(QCPItemPosition::ptPlotCoords);
     background->setScaled(true, Qt::IgnoreAspectRatio);
     background->setLayer("background");
     background->setVisible(true);
 
     avtUI->raBox->setDegType(false);
     avtUI->decBox->setDegType(true);
 
     //FIXME:
     //Doesn't make sense to manually adjust long/lat unless we can modify TZ also
     avtUI->longBox->setReadOnly(true);
     avtUI->latBox->setReadOnly(true);
 
     topLayout->addWidget(avtUI);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     topLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     QPushButton *printB = new QPushButton(
         QIcon::fromTheme("document-print", QIcon(":/icons/breeze/default/document-print.svg")), i18n("&Print..."));
     printB->setToolTip(i18n("Print the Altitude vs. time plot"));
     buttonBox->addButton(printB, QDialogButtonBox::ActionRole);
     connect(printB, SIGNAL(clicked()), this, SLOT(slotPrint()));
 
     geo = KStarsData::Instance()->geo();
 
     DayOffset = 0;
     // set up the initial minimum and maximum altitude
     minAlt = 0;
     maxAlt = 0;
     showCurrentDate();
     if (getDate().time().hour() > 12)
         DayOffset = 1;
 
     avtUI->longBox->show(geo->lng());
     avtUI->latBox->show(geo->lat());
 
     computeSunRiseSetTimes();
     setLSTLimits();
     setDawnDusk();
 
     connect(avtUI->View->yAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(onYRangeChanged(QCPRange)));
     connect(avtUI->View->xAxis2, SIGNAL(rangeChanged(QCPRange)), this, SLOT(onXRangeChanged(QCPRange)));
     connect(avtUI->View, SIGNAL(plottableClick(QCPAbstractPlottable*,int,QMouseEvent*)), this,
             SLOT(plotMousePress(QCPAbstractPlottable*,int,QMouseEvent*)));
     connect(avtUI->View, SIGNAL(mouseMove(QMouseEvent*)), this, SLOT(mouseOverLine(QMouseEvent*)));
 
     connect(avtUI->browseButton, SIGNAL(clicked()), this, SLOT(slotBrowseObject()));
     connect(avtUI->cityButton, SIGNAL(clicked()), this, SLOT(slotChooseCity()));
     connect(avtUI->updateButton, SIGNAL(clicked()), this, SLOT(slotUpdateDateLoc()));
     connect(avtUI->clearButton, SIGNAL(clicked()), this, SLOT(slotClear()));
     connect(avtUI->addButton, SIGNAL(clicked()), this, SLOT(slotAddSource()));
     connect(avtUI->nameBox, SIGNAL(returnPressed()), this, SLOT(slotAddSource()));
     connect(avtUI->raBox, SIGNAL(returnPressed()), this, SLOT(slotAddSource()));
     connect(avtUI->decBox, SIGNAL(returnPressed()), this, SLOT(slotAddSource()));
     connect(avtUI->clearFieldsButton, SIGNAL(clicked()), this, SLOT(slotClearBoxes()));
     connect(avtUI->longBox, SIGNAL(returnPressed()), this, SLOT(slotAdvanceFocus()));
     connect(avtUI->latBox, SIGNAL(returnPressed()), this, SLOT(slotAdvanceFocus()));
     connect(avtUI->PlotList, SIGNAL(currentRowChanged(int)), this, SLOT(slotHighlight(int)));
     connect(avtUI->computeButton, SIGNAL(clicked()), this, SLOT(slotComputeAltitudeByTime()));
     connect(avtUI->riseButton, SIGNAL(clicked()), this, SLOT(slotMarkRiseTime()));
     connect(avtUI->setButton, SIGNAL(clicked()), this, SLOT(slotMarkSetTime()));
     connect(avtUI->transitButton, SIGNAL(clicked()), this, SLOT(slotMarkTransitTime()));
 
     // Set up the Rise/Set/Transit buttons' icons:
 
     QPixmap redButton(100, 100);
     redButton.fill(Qt::transparent);
     QPainter p;
     p.begin(&redButton);
     p.setRenderHint(QPainter::Antialiasing, true);
     QPen pen(Qt::red, 2);
     p.setPen(pen);
     QBrush brush(Qt::red);
     p.setBrush(brush);
     p.drawEllipse(15, 15, 80, 80);
     p.end();
 
     QPixmap blueButton(100, 100);
     blueButton.fill(Qt::transparent);
     QPainter p1;
     p1.begin(&blueButton);
     p1.setRenderHint(QPainter::Antialiasing, true);
     QPen pen1(Qt::blue, 2);
     p1.setPen(pen1);
     QBrush brush1(Qt::blue);
     p1.setBrush(brush1);
     p1.drawEllipse(15, 15, 80, 80);
     p1.end();
 
     QPixmap greenButton(100, 100);
     greenButton.fill(Qt::transparent);
     QPainter p2;
     p2.begin(&greenButton);
     p2.setRenderHint(QPainter::Antialiasing, true);
     QPen pen2(Qt::green, 2);
     p2.setPen(pen2);
     QBrush brush2(Qt::green);
     p2.setBrush(brush2);
     p2.drawEllipse(15, 15, 80, 80);
     p2.end();
 
     avtUI->riseButton->setIcon(QIcon(redButton));
     avtUI->setButton->setIcon(QIcon(blueButton));
     avtUI->transitButton->setIcon(QIcon(greenButton));
 
     setMouseTracking(true);
 }
 
 AltVsTime::~AltVsTime()
 {
     //WARNING: need to delete deleteList items!
 }
 void AltVsTime::slotAddSource()
 {
     SkyObject *obj = KStarsData::Instance()->objectNamed(avtUI->nameBox->text());
 
     if (obj)
     {
         //An object with the current name exists.  If the object is not already
         //in the avt list, add it.
         bool found = false;
         foreach (SkyObject *o, pList)
         {
             //if ( o->name() == obj->name() ) {
             if (getObjectName(o, false) == getObjectName(obj, false))
             {
                 found = true;
                 break;
             }
         }
         if (!found)
             processObject(obj);
     }
     else
     {
         //Object with the current name doesn't exist.  It's possible that the
         //user is trying to add a custom object.  Assume this is the case if
         //the RA and Dec fields are filled in.
 
         if (!avtUI->nameBox->text().isEmpty() && !avtUI->raBox->text().isEmpty() && !avtUI->decBox->text().isEmpty())
         {
             bool okRA, okDec;
             dms newRA  = avtUI->raBox->createDms(false, &okRA);
             dms newDec = avtUI->decBox->createDms(true, &okDec);
             if (!okRA || !okDec)
                 return;
 
             //If the epochName is blank (or any non-double), we assume J2000
             //Otherwise, precess to J2000.
             KStarsDateTime dt;
             dt.setFromEpoch(getEpoch(avtUI->epochName->text()));
             long double jd = dt.djd();
             if (jd != J2000)
             {
                 SkyPoint ptest(newRA, newDec);
                 ptest.precessFromAnyEpoch(jd, J2000);
                 newRA.setH(ptest.ra().Hours());
                 newDec.setD(ptest.dec().Degrees());
             }
 
             //make sure the coords do not already exist from another object
             bool found = false;
             foreach (SkyObject *p, pList)
             {
                 //within an arcsecond?
                 if (fabs(newRA.Degrees() - p->ra().Degrees()) < 0.0003 &&
                     fabs(newDec.Degrees() - p->dec().Degrees()) < 0.0003)
                 {
                     found = true;
                     break;
                 }
             }
             if (!found)
             {
                 SkyObject *obj = new SkyObject(8, newRA, newDec, 1.0, avtUI->nameBox->text());
                 deleteList.append(obj); //this object will be deleted when window is destroyed
                 processObject(obj);
             }
         }
 
         //If the Ra and Dec boxes are filled, but the name field is empty,
         //move input focus to nameBox.  If either coordinate box is empty,
         //move focus there
         if (avtUI->nameBox->text().isEmpty())
         {
             avtUI->nameBox->QWidget::setFocus();
         }
         if (avtUI->raBox->text().isEmpty())
         {
             avtUI->raBox->QWidget::setFocus();
         }
         else
         {
             if (avtUI->decBox->text().isEmpty())
                 avtUI->decBox->QWidget::setFocus();
         }
     }
 
     avtUI->View->update();
 }
 
 //Use find dialog to choose an object
 void AltVsTime::slotBrowseObject()
 {
     QPointer<FindDialog> fd = new FindDialog(this);
     if (fd->exec() == QDialog::Accepted)
     {
         SkyObject *o = fd->targetObject();
         processObject(o);
     }
     delete fd;
 
     avtUI->View->update();
     avtUI->View->replot();
 }
 
 void AltVsTime::processObject(SkyObject *o, bool forceAdd)
 {
     if (!o)
         return;
 
     KSNumbers *num    = new KSNumbers(getDate().djd());
-    KSNumbers *oldNum = 0;
+    KSNumbers *oldNum = nullptr;
 
     //If the object is in the solar system, recompute its position for the given epochLabel
     KStarsData *data = KStarsData::Instance();
     if (o->isSolarSystem())
     {
         oldNum = new KSNumbers(data->ut().djd());
         o->updateCoords(num, true, geo->lat(), data->lst(), true);
     }
 
     //precess coords to target epoch
     o->updateCoordsNow(num);
 
     // vector used for computing the points needed for drawing the graph
     QVector<double> y(100), t(100);
 
     //If this point is not in list already, add it to list
     bool found(false);
     foreach (SkyObject *p, pList)
     {
         if (o->ra().Degrees() == p->ra().Degrees() && o->dec().Degrees() == p->dec().Degrees())
         {
             found = true;
             break;
         }
     }
     if (found && !forceAdd)
     {
         qCWarning(KSTARS) << "This point is already displayed; It will not be duplicated.";
     }
     else
     {
         pList.append(o);
 
         // make sure existing curves are thin and red:
 
         for (int i = 0; i < avtUI->View->graphCount(); i++)
         {
             if (avtUI->View->graph(i)->pen().color() == Qt::white)
             {
                 avtUI->View->graph(i)->setPen(QPen(Qt::red, 2));
             }
         }
 
         // SET up the curve's name
         avtUI->View->addGraph()->setName(o->name());
 
         // compute the current graph:
         // time range: 24h
 
         int offset = 3;
         for (double h = -12.0, i = 0; h <= 12.0; h += 0.25, i++)
         {
             y[i] = findAltitude(o, h);
             if (y[i] > maxAlt)
                 maxAlt = y[i];
             if (y[i] < minAlt)
                 minAlt = y[i];
             t[i] = i * 900 + 43200;
             avtUI->View->graph(avtUI->View->graphCount() - 1)->addData(t[i], y[i]);
         }
         avtUI->View->graph(avtUI->View->graphCount() - 1)->setPen(QPen(Qt::white, 3));
 
         // Go into initial state: without Zoom/Pan
         avtUI->View->xAxis->setRange(43200, 129600);
         avtUI->View->xAxis2->setRange(61200, 147600);
         if (abs(minAlt) > maxAlt)
             maxAlt = abs(minAlt);
         else
             minAlt = -maxAlt;
 
         avtUI->View->yAxis->setRange(minAlt - offset, maxAlt + offset);
 
         // Update background coordonates:
         background->topLeft->setCoords(avtUI->View->xAxis->range().lower, avtUI->View->yAxis->range().upper);
         background->bottomRight->setCoords(avtUI->View->xAxis->range().upper, avtUI->View->yAxis->range().lower);
 
         avtUI->View->replot();
 
         avtUI->PlotList->addItem(getObjectName(o));
         avtUI->PlotList->setCurrentRow(avtUI->PlotList->count() - 1);
         avtUI->raBox->showInHours(o->ra());
         avtUI->decBox->showInDegrees(o->dec());
         avtUI->nameBox->setText(getObjectName(o));
 
         //Set epochName to epoch shown in date tab
         avtUI->epochName->setText(QString().setNum(getDate().epoch()));
     }
     //qCDebug() << "Currently, there are " << avtUI->View->graphCount() << " objects displayed.";
 
     //restore original position
     if (o->isSolarSystem())
     {
         o->updateCoords(oldNum, true, data->geo()->lat(), data->lst(), true);
         delete oldNum;
     }
     o->EquatorialToHorizontal(data->lst(), data->geo()->lat());
     delete num;
 }
 
 double AltVsTime::findAltitude(SkyPoint *p, double hour)
 {
     hour += 24.0 * DayOffset;
 
     //getDate converts the user-entered local time to UT
     KStarsDateTime ut = getDate().addSecs(hour * 3600.0);
 
     CachingDms LST = geo->GSTtoLST(ut.gst());
     p->EquatorialToHorizontal(&LST, geo->lat());
     return p->alt().Degrees();
 }
 
 void AltVsTime::slotHighlight(int row)
 {
     if (row < 0)
         return;
 
     int rowIndex = 0;
     //highlight the curve of the selected object
     for (int i = 0; i < avtUI->View->graphCount(); i++)
     {
         if (i == row)
             rowIndex = row;
         else
         {
             avtUI->View->graph(i)->setPen(QPen(Qt::red, 2));
             avtUI->View->graph(i)->setLayer("main");
         }
     }
     avtUI->View->graph(rowIndex)->setPen(QPen(Qt::white, 3));
     avtUI->View->graph(rowIndex)->setLayer("currentCurveLayer");
     avtUI->View->update();
     avtUI->View->replot();
 
     if (row >= 0 && row < pList.size())
     {
         SkyObject *p = pList.at(row);
         avtUI->raBox->showInHours(p->ra());
         avtUI->decBox->showInDegrees(p->dec());
         avtUI->nameBox->setText(avtUI->PlotList->currentItem()->text());
     }
 
     SkyObject *selectedObject = KStarsData::Instance()->objectNamed(avtUI->nameBox->text());
     const KStarsDateTime &ut  = KStarsData::Instance()->ut();
     if (selectedObject)
     {
         QTime rt = selectedObject->riseSetTime(ut, geo, true); //true = use rise time
         if (rt.isValid() == false)
         {
             avtUI->riseButton->setEnabled(false);
             avtUI->setButton->setEnabled(false);
         }
         else
         {
             avtUI->riseButton->setEnabled(true);
             avtUI->setButton->setEnabled(true);
         }
     }
 }
 
 void AltVsTime::onXRangeChanged(const QCPRange &range)
 {
     QCPRange aux = avtUI->View->xAxis2->range();
     avtUI->View->xAxis->setRange(aux -= 18000);
     avtUI->View->xAxis2->setRange(range.bounded(61200, 147600));
     // if ZOOM is detected then remove the gold lines that indicate current position:
     if (avtUI->View->xAxis->range().size() != 86400)
     {
         // Refresh the background:
         background->setScaled(false);
         background->setScaled(true, Qt::IgnoreAspectRatio);
         background->setPixmap(*gradient);
 
         avtUI->View->update();
         avtUI->View->replot();
     }
 }
 
 void AltVsTime::onYRangeChanged(const QCPRange &range)
 {
     int offset = 3;
     avtUI->View->yAxis->setRange(range.bounded(minAlt - offset, maxAlt + offset));
 }
 
 void AltVsTime::plotMousePress(QCPAbstractPlottable *abstractPlottable, int dataIndex, QMouseEvent *event)
 {
     //Do we need this?
     Q_UNUSED(dataIndex);
 
     if (event->button() == Qt::RightButton)
     {
         QCPAbstractPlottable *plottable = abstractPlottable;
         if (plottable)
         {
             double x = avtUI->View->xAxis->pixelToCoord(event->localPos().x());
             double y = avtUI->View->yAxis->pixelToCoord(event->localPos().y());
 
             QCPGraph *graph = qobject_cast<QCPGraph *>(plottable);
 
             if (graph)
             {
                 double yValue = y;
                 double xValue = x;
 
                 // Compute time value:
                 QTime localTime(0, 0, 0, 0);
                 QTime localSiderealTime(5, 0, 0, 0);
 
                 localTime         = localTime.addSecs(int(xValue));
                 localSiderealTime = localSiderealTime.addSecs(int(xValue));
 
                 QToolTip::hideText();
                 QToolTip::showText(event->globalPos(),
                                    tr("<table>"
                                       "<tr>"
                                       "<th colspan=\"2\">%L1</th>"
                                       "</tr>"
                                       "<tr>"
                                       "<td>LST:   </td>"
                                       "<td>%L3</td>"
                                       "</tr>"
                                       "<tr>"
                                       "<td>LT:   </td>"
                                       "<td>%L2</td>"
                                       "</tr>"
                                       "<tr>"
                                       "<td>Altitude:   </td>"
                                       "<td>%L4</td>"
                                       "</tr>"
                                       "</table>")
                                        .arg((graph->name().isEmpty() ? "???" : graph->name()),
                                             localTime.toString(),
                                             localSiderealTime.toString(),
                                             QString::number(yValue, 'f', 2) + ' ' + QChar(176)),
                                    avtUI->View, avtUI->View->rect());
             }
         }
     }
 }
 
 //move input focus to the next logical widget
 void AltVsTime::slotAdvanceFocus()
 {
     if (sender()->objectName() == QString("nameBox"))
         avtUI->addButton->setFocus();
     if (sender()->objectName() == QString("raBox"))
         avtUI->decBox->setFocus();
     if (sender()->objectName() == QString("decbox"))
         avtUI->addButton->setFocus();
     if (sender()->objectName() == QString("longBox"))
         avtUI->latBox->setFocus();
     if (sender()->objectName() == QString("latBox"))
         avtUI->updateButton->setFocus();
 }
 
 void AltVsTime::slotClear()
 {
     pList.clear();
     //Need to delete the pointers in deleteList
     while (!deleteList.isEmpty())
         delete deleteList.takeFirst();
 
     avtUI->PlotList->clear();
     avtUI->nameBox->clear();
     avtUI->raBox->clear();
     avtUI->decBox->clear();
     avtUI->epochName->clear();
     // remove all graphs from the plot:
     avtUI->View->clearGraphs();
     // we remove all the dots (rise/set/transit) from the chart
     // without removing the background image
     int indexItem = 0, noItems = avtUI->View->itemCount();
     QCPAbstractItem *item;
     QCPItemPixmap *background;
     // remove every item at a time:
     while (noItems > 1 && indexItem < noItems)
     {
         // test if the current item is the background:
         item       = avtUI->View->item(indexItem);
         background = qobject_cast<QCPItemPixmap *>(item);
         if (background)
             indexItem++;
         else
         {
             // if not, then remove this item:
             avtUI->View->removeItem(indexItem);
             noItems--;
         }
     }
     // update & replot the chart:
     avtUI->View->update();
     avtUI->View->replot();
 }
 
 void AltVsTime::slotClearBoxes()
 {
     avtUI->nameBox->clear();
     avtUI->raBox->clear();
     avtUI->decBox->clear();
     avtUI->epochName->clear();
 }
 
 void AltVsTime::slotComputeAltitudeByTime()
 {
 // FIXME Migrate to QCustomPlot 2.0
 #if 0
     // check if at least one graph exists in the plot
     if( avtUI->View->graphCount() > 0 )
     {
         // get the time from the time spin box
         QTime timeFormat = avtUI->timeSpin->time();
         double hours = timeFormat.hour();
         double minutes = timeFormat.minute();
         // convert the hours over 24 to correct their values
         if( hours < 12 )
             hours += 24;
         double timeValue = hours * 3600 + minutes * 60;
         QCPGraph * selectedGraph;
         // get the graph's name from the name box
         QString graphName = avtUI->nameBox->text();
         // find the graph index
         int graphIndex = 0;
         for( int i=0; i<avtUI->View->graphCount(); i++ )
             if( avtUI->View->graph(i)->name().compare(graphName) == 0 )
             {
                 graphIndex = i;
                 break;
             }
         selectedGraph = avtUI->View->graph(graphIndex);
         // get the data from the selected graph
         QCPDataMap * dataMap = selectedGraph->data();
         double averageAltitude = 0;
         double altitude1 = dataMap->lowerBound(timeValue-899).value().value;
         double altitude2 = dataMap->lowerBound(timeValue).value().value;
         double time1 = dataMap->lowerBound(timeValue-899).value().key;
         averageAltitude = (altitude1+altitude2)/2;
         // short algorithm to compute the right altitude for a certain time
         if( timeValue > time1 )
         {
             if( timeValue - time1 < 225 )
                 averageAltitude = altitude1;
             else if( timeValue - time1 < 675 )
                 averageAltitude = (altitude1+altitude2)/2;
             else
                 averageAltitude = altitude2;
         }
         // set the altitude in the altitude box
         avtUI->altitudeBox->setText( QString::number(averageAltitude, 'f', 2) );
     }
 #endif
 }
 
 void AltVsTime::slotMarkRiseTime()
 {
     const KStarsDateTime &ut  = KStarsData::Instance()->ut();
     SkyObject *selectedObject = pList.at(avtUI->PlotList->currentRow());
     if (selectedObject == nullptr)
     {
         qCWarning(KSTARS) << "Mark Rise Time: Unable to find" << avtUI->PlotList->currentItem()->text();
         return;
     }
 
     QCPItemTracer *riseTimeTracer;
     // check if at least one graph exists in the plot
     if (avtUI->View->graphCount() > 0)
     {
         double time = 0;
         double hours, minutes;
 
         QCPGraph *selectedGraph = avtUI->View->graph(avtUI->PlotList->currentRow());
 
         QTime rt = selectedObject->riseSetTime(ut, geo, true); //true = use rise time
         // mark the Rise time with a solid red circle
         if (rt.isValid() && selectedGraph)
         {
             hours   = rt.hour();
             minutes = rt.minute();
             if (hours < 12)
                 hours += 24;
             time           = hours * 3600 + minutes * 60;
             riseTimeTracer = new QCPItemTracer(avtUI->View);
             riseTimeTracer->setLayer("markersLayer");
             riseTimeTracer->setGraph(selectedGraph);
             riseTimeTracer->setInterpolating(true);
             riseTimeTracer->setStyle(QCPItemTracer::tsCircle);
             riseTimeTracer->setPen(QPen(Qt::red));
             riseTimeTracer->setBrush(Qt::red);
             riseTimeTracer->setSize(10);
             riseTimeTracer->setGraphKey(time);
             riseTimeTracer->setVisible(true);
             avtUI->View->update();
             avtUI->View->replot();
         }
     }
 }
 
 void AltVsTime::slotMarkSetTime()
 {
     const KStarsDateTime &ut  = KStarsData::Instance()->ut();
      SkyObject *selectedObject = pList.at(avtUI->PlotList->currentRow());
     if (selectedObject == nullptr)
     {
         qCWarning(KSTARS) << "Mark Set Time: Unable to find" << avtUI->PlotList->currentItem()->text();
         return;
     }
     QCPItemTracer *setTimeTracer;
     // check if at least one graph exists in the plot
     if (avtUI->View->graphCount() > 0)
     {
         double time = 0;
         double hours, minutes;
 
         QCPGraph *selectedGraph = avtUI->View->graph(avtUI->PlotList->currentRow());
 
         QTime rt = selectedObject->riseSetTime(ut, geo, true); //true = use rise time
         //If set time is before rise time, use set time for tomorrow
         QTime st = selectedObject->riseSetTime(ut, geo, false); //false = use set time
         if (st < rt)
             st = selectedObject->riseSetTime(ut.addDays(1), geo, false); //false = use set time
         // mark the Set time with a solid blue circle
         if (rt.isValid())
         {
             hours   = st.hour();
             minutes = st.minute();
             if (hours < 12)
                 hours += 24;
             time          = hours * 3600 + minutes * 60;
             setTimeTracer = new QCPItemTracer(avtUI->View);
             setTimeTracer->setLayer("markersLayer");
             setTimeTracer->setGraph(selectedGraph);
             setTimeTracer->setInterpolating(true);
             setTimeTracer->setStyle(QCPItemTracer::tsCircle);
             setTimeTracer->setPen(QPen(Qt::blue));
             setTimeTracer->setBrush(Qt::blue);
             setTimeTracer->setSize(10);
             setTimeTracer->setGraphKey(time);
             setTimeTracer->setVisible(true);
             avtUI->View->update();
             avtUI->View->replot();
         }
     }
 }
 
 void AltVsTime::slotMarkTransitTime()
 {
     const KStarsDateTime &ut  = KStarsData::Instance()->ut();
     SkyObject *selectedObject = pList.at(avtUI->PlotList->currentRow());
     if (selectedObject == nullptr)
     {
         qCWarning(KSTARS) << "Mark Transit Time: Unable to find" << avtUI->PlotList->currentItem()->text();
         return;
     }
     QCPItemTracer *transitTimeTracer;
     // check if at least one graph exists in the plot
     if (avtUI->View->graphCount() > 0)
     {
         double time = 0;
         double hours, minutes;
 
         QCPGraph *selectedGraph = avtUI->View->graph(avtUI->PlotList->currentRow());
 
         QTime rt = selectedObject->riseSetTime(ut, geo, true); //true = use rise time
         //If transit time is before rise time, use transit time for tomorrow
         QTime tt = selectedObject->transitTime(ut, geo);
 
         if (tt < rt)
             tt = selectedObject->transitTime(ut.addDays(1), geo);
         // mark the Transit time with a solid green circle
         hours   = tt.hour();
         minutes = tt.minute();
         if (hours < 12)
             hours += 24;
         time              = hours * 3600 + minutes * 60;
         transitTimeTracer = new QCPItemTracer(avtUI->View);
         transitTimeTracer->setLayer("markersLayer");
         transitTimeTracer->setGraph(selectedGraph);
         transitTimeTracer->setInterpolating(true);
         transitTimeTracer->setStyle(QCPItemTracer::tsCircle);
         transitTimeTracer->setPen(QPen(Qt::green));
         transitTimeTracer->setBrush(Qt::green);
         transitTimeTracer->setSize(10);
         transitTimeTracer->setGraphKey(time);
         transitTimeTracer->setVisible(true);
         avtUI->View->update();
         avtUI->View->replot();
     }
 }
 
 void AltVsTime::computeSunRiseSetTimes()
 {
     //Determine the time of sunset and sunrise for the desired date and location
     //expressed as doubles, the fraction of a full day.
     KStarsDateTime today = getDate();
     KSAlmanac ksal;
     ksal.setDate(&today);
     ksal.setLocation(geo);
 }
 
 //FIXME
 /*
 void AltVsTime::mouseOverLine(QMouseEvent *event){
     // Get the mouse position's coordinates relative to axes:
     double x = avtUI->View->xAxis->pixelToCoord(event->pos().x());
     double y = avtUI->View->yAxis->pixelToCoord(event->pos().y());
     // Save the actual values:
     double yValue = y;
     double xValue = x;
     // The offset used for the Y axis: top/bottom
     int offset = 3;
     // Compute the Y axis maximum value:
     int yAxisMaxValue = maxAlt + offset;
     // Compute the X axis minimum and maximum values:
     int xAxisMinValue = 43200;
     int xAxisMaxValue = 129600;
     // Ignore the upper and left margins:
     y = yAxisMaxValue - y;
     x -= xAxisMinValue;
     // We make a copy to gradient background in order to have one set of lines at a time:
     // Otherwise, the chart would have been covered by lines
     QPixmap copy = gradient->copy(gradient->rect());
     // If ZOOM is not active, then draw the gold lines that indicate current mouse pisition:
     if(avtUI->View->xAxis->range().size() == 86400){
         QPainter p;
 
         p.begin(&copy);
         p.setPen( QPen( QBrush("gold"), 2, Qt::SolidLine ) );
 
         // Get the gradient background's width and height:
         int pW = gradient->rect().width();
         int pH = gradient->rect().height();
 
         // Compute the real coordinates within the chart:
         y = (y*pH/2)/yAxisMaxValue;
         x = (x*pW)/(xAxisMaxValue-xAxisMinValue);
 
         // Draw the horizontal line (altitude):
         p.drawLine( QLineF( 0.5, y, avtUI->View->rect().width()-0.5,y ) );
         // Draw the altitude value:
         p.setPen( QPen( QBrush("gold"), 3, Qt::SolidLine ) );
         p.drawText( 25, y + 15, QString::number(yValue,'f',2) + QChar(176) );
         p.setPen( QPen( QBrush("gold"), 1, Qt::SolidLine ) );
         // Draw the vertical line (time):
         p.drawLine( QLineF( x, 0.5, x, avtUI->View->rect().height()-0.5 ) );
         // Compute and draw the time value:
         QTime localTime(0,0,0,0);
         localTime = localTime.addSecs(int(xValue));
         p.save();
         p.translate( x + 10, pH - 20 );
         p.rotate(-90);
         p.setPen( QPen( QBrush("gold"), 3, Qt::SolidLine ) );
         p.drawText( 5, 5, QLocale().toString( localTime, QLocale::ShortFormat ) ); // short format necessary to avoid false time-zone labeling
         p.restore();
         p.end();
     }
     // Refresh the background:
     background->setScaled(false);
     background->setScaled(true, Qt::IgnoreAspectRatio);
     background->setPixmap(copy);
 
     avtUI->View->update();
     avtUI->View->replot();
 }
 */
 
 void AltVsTime::mouseOverLine(QMouseEvent *event)
 {
     double x                            = avtUI->View->xAxis->pixelToCoord(event->localPos().x());
     double y                            = avtUI->View->yAxis->pixelToCoord(event->localPos().y());
     QCPAbstractPlottable *abstractGraph = avtUI->View->plottableAt(event->pos(), false);
     QCPGraph *graph                     = qobject_cast<QCPGraph *>(abstractGraph);
 
     if (x > avtUI->View->xAxis->range().lower && x < avtUI->View->xAxis->range().upper)
         if (y > avtUI->View->yAxis->range().lower && y < avtUI->View->yAxis->range().upper)
         {
             if (graph)
             {
                 double yValue = y;
                 double xValue = x;
 
                 // Compute time value:
                 QTime localTime(0, 0, 0, 0);
                 QTime localSiderealTime(5, 0, 0, 0);
 
                 localTime         = localTime.addSecs(int(xValue));
                 localSiderealTime = localSiderealTime.addSecs(int(xValue));
 
                 QToolTip::hideText();
                 QToolTip::showText(event->globalPos(),
                                    tr("<table>"
                                       "<tr>"
                                       "<th colspan=\"2\">%L1</th>"
                                       "</tr>"
                                       "<tr>"
                                       "<td>LST:   </td>"
                                       "<td>%L3</td>"
                                       "</tr>"
                                       "<tr>"
                                       "<td>LT:   </td>"
                                       "<td>%L2</td>"
                                       "</tr>"
                                       "<tr>"
                                       "<td>Altitude:   </td>"
                                       "<td>%L4</td>"
                                       "</tr>"
                                       "</table>")
                                        .arg((graph->name().isEmpty() ? "???" : graph->name()),
                                             localTime.toString(), localSiderealTime.toString(),
                                             QString::number(yValue, 'f', 2) + ' ' + QChar(176)),
                                    avtUI->View, avtUI->View->rect());
             }
             else
                 QToolTip::hideText();
         }
 
     avtUI->View->update();
     avtUI->View->replot();
 }
 
 void AltVsTime::slotUpdateDateLoc()
 {
     KStarsData *data     = KStarsData::Instance();
     KStarsDateTime today = getDate();
     KSNumbers *num       = new KSNumbers(today.djd());
-    KSNumbers *oldNum    = 0;
+    KSNumbers *oldNum    = nullptr;
     CachingDms LST       = geo->GSTtoLST(today.gst());
 
     //First determine time of sunset and sunrise
     computeSunRiseSetTimes();
     // Determine dawn/dusk time and min/max sun elevation
     setDawnDusk();
 
     for (int i = 0; i < pList.count(); ++i)
     {
         SkyObject *o = pList.at(i);
         if (o)
         {
             //If the object is in the solar system, recompute its position for the given date
             if (o->isSolarSystem())
             {
                 oldNum = new KSNumbers(data->ut().djd());
                 o->updateCoords(num, true, geo->lat(), &LST, true);
             }
 
             //precess coords to target epoch
             o->updateCoordsNow(num);
 
             //update pList entry
             pList.replace(i, o);
 
             // We are creating a new data set (time, altitude) for the new date:
             QVector<double> time_dataSet, altitude_dataSet;
             double point_altitudeValue, point_timeValue;
             // compute the new graph values:
             // time range: 24h
             int offset = 3;
             for (double h = -12.0, i = 0; h <= 12.0; h += 0.25, i++)
             {
                 point_altitudeValue = findAltitude(o, h);
                 altitude_dataSet.push_back(point_altitudeValue);
                 if (point_altitudeValue > maxAlt)
                     maxAlt = point_altitudeValue;
                 if (point_altitudeValue < minAlt)
                     minAlt = point_altitudeValue;
                 point_timeValue = i * 900 + 43200;
                 time_dataSet.push_back(point_timeValue);
             }
 
             // Replace graph data set:
             avtUI->View->graph(i)->setData(time_dataSet, altitude_dataSet);
 
             // Go into initial state: without Zoom/Pan
             avtUI->View->xAxis->setRange(43200, 129600);
             avtUI->View->xAxis2->setRange(61200, 147600);
 
             // Center the altitude axis in 0 value:
             if (abs(minAlt) > maxAlt)
                 maxAlt = abs(minAlt);
             else
                 minAlt = -maxAlt;
             avtUI->View->yAxis->setRange(minAlt - offset, maxAlt + offset);
 
             // Update background coordonates:
             background->topLeft->setCoords(avtUI->View->xAxis->range().lower, avtUI->View->yAxis->range().upper);
             background->bottomRight->setCoords(avtUI->View->xAxis->range().upper, avtUI->View->yAxis->range().lower);
 
             // Redraw the plot:
             avtUI->View->replot();
 
             //restore original position
             if (o->isSolarSystem())
             {
                 o->updateCoords(oldNum, true, data->geo()->lat(), data->lst());
                 delete oldNum;
-                oldNum = 0;
+                oldNum = nullptr;
             }
             o->EquatorialToHorizontal(data->lst(), data->geo()->lat());
         }
         else //assume unfound object is a custom object
         {
             pList.at(i)->updateCoordsNow(num); //precess to desired epoch
 
             // We are creating a new data set (time, altitude) for the new date:
             QVector<double> time_dataSet, altitude_dataSet;
             double point_altitudeValue, point_timeValue;
             // compute the new graph values:
             // time range: 24h
             int offset = 3;
             for (double h = -12.0, i = 0; h <= 12.0; h += 0.25, i++)
             {
                 point_altitudeValue = findAltitude(pList.at(i), h);
                 altitude_dataSet.push_back(point_altitudeValue);
                 if (point_altitudeValue > maxAlt)
                     maxAlt = point_altitudeValue;
                 if (point_altitudeValue < minAlt)
                     minAlt = point_altitudeValue;
                 point_timeValue = i * 900 + 43200;
                 time_dataSet.push_back(point_timeValue);
             }
 
             // Replace graph data set:
             avtUI->View->graph(i)->setData(time_dataSet, altitude_dataSet);
 
             // Go into initial state: without Zoom/Pan
             avtUI->View->xAxis->setRange(43200, 129600);
             avtUI->View->xAxis2->setRange(61200, 147600);
 
             // Center the altitude axis in 0 value:
             if (abs(minAlt) > maxAlt)
                 maxAlt = abs(minAlt);
             else
                 minAlt = -maxAlt;
             avtUI->View->yAxis->setRange(minAlt - offset, maxAlt + offset);
 
             // Update background coordonates:
             background->topLeft->setCoords(avtUI->View->xAxis->range().lower, avtUI->View->yAxis->range().upper);
             background->bottomRight->setCoords(avtUI->View->xAxis->range().upper, avtUI->View->yAxis->range().lower);
 
             // Redraw the plot:
             avtUI->View->replot();
         }
     }
 
     if (getDate().time().hour() > 12)
         DayOffset = 1;
     else
         DayOffset = 0;
 
     setLSTLimits();
     slotHighlight(avtUI->PlotList->currentRow());
     avtUI->View->update();
 
     delete num;
 }
 
 void AltVsTime::slotChooseCity()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
     if (ld->exec() == QDialog::Accepted)
     {
         GeoLocation *newGeo = ld->selectedCity();
         if (newGeo)
         {
             geo = newGeo;
             avtUI->latBox->showInDegrees(geo->lat());
             avtUI->longBox->showInDegrees(geo->lng());
         }
     }
     delete ld;
 }
 
 // FIXME: should we remove this method?
 void AltVsTime::setLSTLimits()
 {
     /*
     //UT at noon on target date
     KStarsDateTime ut = getDate().addSecs(((double)DayOffset + 0.5)*86400.);
 
     dms lst = geo->GSTtoLST(ut.gst());
     double h1 = lst.Hours();
     if(h1 > 12.0)
         h1 -= 24.0;
     double h2 = h1 + 24.0;
     avtUI->View->setSecondaryLimits(h1, h2, -90.0, 90.0);
     */
 }
 
 void AltVsTime::showCurrentDate()
 {
     KStarsDateTime dt = KStarsDateTime::currentDateTime();
     if (dt.time() > QTime(12, 0, 0))
         dt = dt.addDays(1);
     avtUI->DateWidget->setDate(dt.date());
 }
 
 void AltVsTime::drawGradient()
 {
     // Things needed for Gradient:
     KSAlmanac ksal;
     KStarsDateTime dtt  = KStarsDateTime::currentDateTime();
     GeoLocation *geoLoc = KStarsData::Instance()->geo();
     QDateTime midnight  = QDateTime(dtt.date(), QTime());
     KStarsDateTime utt  = geoLoc->LTtoUT(KStarsDateTime(midnight));
 
     // Variables needed for Gradient:
     double SunRise, SunSet, Dawn, Dusk, SunMinAlt, SunMaxAlt;
     double MoonRise, MoonSet, MoonIllum;
 
     ksal.setLocation(geoLoc);
     ksal.setDate(&utt);
 
     // Get the values:
     SunRise   = ksal.getSunRise();
     SunSet    = ksal.getSunSet();
     SunMaxAlt = ksal.getSunMaxAlt();
     SunMinAlt = ksal.getSunMinAlt();
     MoonRise  = ksal.getMoonRise();
     MoonSet   = ksal.getMoonSet();
     MoonIllum = ksal.getMoonIllum();
     Dawn      = ksal.getDawnAstronomicalTwilight();
     Dusk      = ksal.getDuskAstronomicalTwilight();
 
     gradient = new QPixmap(avtUI->View->rect().width(), avtUI->View->rect().height());
 
     QPainter p;
 
     p.begin(gradient);
     KPlotWidget *kPW = new KPlotWidget;
     p.setRenderHint(QPainter::Antialiasing, kPW->antialiasing());
     p.fillRect(gradient->rect(), kPW->backgroundColor());
 
     p.setClipRect(gradient->rect());
     p.setClipping(true);
 
     int pW = gradient->rect().width();
     int pH = gradient->rect().height();
 
     QColor SkyColor(0, 100, 200);
     //    TODO
     //    if( Options::darkAppColors() )
     //        SkyColor = QColor( 200, 0, 0 ); // use something red, visible through a red filter
 
     // Draw gradient representing lunar interference in the sky
     if (MoonIllum > 0.01) // do this only if Moon illumination is reasonable so it's important
     {
         int moonrise = int(pW * (0.5 + MoonRise));
         int moonset  = int(pW * (MoonSet - 0.5));
         if (moonset < 0)
             moonset += pW;
         if (moonrise > pW)
             moonrise -= pW;
         int moonalpha = int(10 + MoonIllum * 130);
         int fadewidth =
             pW *
             0.01; // pW * fraction of day to fade the moon brightness over (0.01 corresponds to roughly 15 minutes, 0.007 to 10 minutes), both before and after actual set.
         QColor MoonColor(255, 255, 255, moonalpha);
 
         if (moonset < moonrise)
         {
             QLinearGradient grad =
                 QLinearGradient(QPointF(moonset - fadewidth, 0.0), QPointF(moonset + fadewidth, 0.0));
             grad.setColorAt(0, MoonColor);
             grad.setColorAt(1, Qt::transparent);
             p.fillRect(QRectF(0.0, 0.0, moonset + fadewidth, pH),
                        grad); // gradient should be padded until moonset - fadewidth (see QLinearGradient docs)
             grad.setStart(QPointF(moonrise + fadewidth, 0.0));
             grad.setFinalStop(QPointF(moonrise - fadewidth, 0.0));
             p.fillRect(QRectF(moonrise - fadewidth, 0.0, pW - moonrise + fadewidth, pH), grad);
         }
         else
         {
             qreal opacity = p.opacity();
             p.setOpacity(opacity / 4);
             p.fillRect(QRectF(moonrise + fadewidth, 0.0, moonset - moonrise - 2 * fadewidth, pH), MoonColor);
             QLinearGradient grad =
                 QLinearGradient(QPointF(moonrise + fadewidth, 0.0), QPointF(moonrise - fadewidth, 0.0));
             grad.setColorAt(0, MoonColor);
             grad.setColorAt(1, Qt::transparent);
             p.fillRect(QRectF(0.0, 0.0, moonrise + fadewidth, pH), grad);
             grad.setStart(QPointF(moonset - fadewidth, 0.0));
             grad.setFinalStop(QPointF(moonset + fadewidth, 0.0));
             p.fillRect(QRectF(moonset - fadewidth, 0.0, pW - moonset, pH), grad);
             p.setOpacity(opacity);
         }
     }
 
     //draw daytime sky if the Sun rises for the current date/location
     if (SunMaxAlt > -18.0)
     {
         //Display centered on midnight, so need to modulate dawn/dusk by 0.5
         int rise = int(pW * (0.5 + SunRise));
         int set  = int(pW * (SunSet - 0.5));
         int da   = int(pW * (0.5 + Dawn));
         int du   = int(pW * (Dusk - 0.5));
 
         if (SunMinAlt > 0.0)
         {
             // The sun never set and the sky is always blue
             p.fillRect(rect(), SkyColor);
         }
         else if (SunMaxAlt < 0.0 && SunMinAlt < -18.0)
         {
             // The sun never rise but the sky is not completely dark
             QLinearGradient grad = QLinearGradient(QPointF(0.0, 0.0), QPointF(du, 0.0));
 
             QColor gradStartColor = SkyColor;
             gradStartColor.setAlpha((1 - (SunMaxAlt / -18.0)) * 255);
 
             grad.setColorAt(0, gradStartColor);
             grad.setColorAt(1, Qt::transparent);
             p.fillRect(QRectF(0.0, 0.0, du, pH), grad);
             grad.setStart(QPointF(pW, 0.0));
             grad.setFinalStop(QPointF(da, 0.0));
             p.fillRect(QRectF(da, 0.0, pW, pH), grad);
         }
         else if (SunMaxAlt < 0.0 && SunMinAlt > -18.0)
         {
             // The sun never rise but the sky is NEVER completely dark
             QLinearGradient grad = QLinearGradient(QPointF(0.0, 0.0), QPointF(pW, 0.0));
 
             QColor gradStartEndColor = SkyColor;
             gradStartEndColor.setAlpha((1 - (SunMaxAlt / -18.0)) * 255);
             QColor gradMidColor = SkyColor;
             gradMidColor.setAlpha((1 - (SunMinAlt / -18.0)) * 255);
 
             grad.setColorAt(0, gradStartEndColor);
             grad.setColorAt(0.5, gradMidColor);
             grad.setColorAt(1, gradStartEndColor);
             p.fillRect(QRectF(0.0, 0.0, pW, pH), grad);
         }
         else if (Dawn < 0.0)
         {
             // The sun sets and rises but the sky is never completely dark
             p.fillRect(0, 0, set, int(0.5 * pH), SkyColor);
             p.fillRect(rise, 0, pW, int(0.5 * pH), SkyColor);
 
             QLinearGradient grad = QLinearGradient(QPointF(set, 0.0), QPointF(rise, 0.0));
 
             QColor gradMidColor = SkyColor;
             gradMidColor.setAlpha((1 - (SunMinAlt / -18.0)) * 255);
 
             grad.setColorAt(0, SkyColor);
             grad.setColorAt(0.5, gradMidColor);
             grad.setColorAt(1, SkyColor);
             p.fillRect(QRectF(set, 0.0, rise - set, pH), grad);
         }
         else
         {
             p.fillRect(0, 0, set, pH, SkyColor);
             p.fillRect(rise, 0, pW, pH, SkyColor);
 
             QLinearGradient grad = QLinearGradient(QPointF(set, 0.0), QPointF(du, 0.0));
             grad.setColorAt(0, SkyColor);
             grad.setColorAt(
                 1,
                 Qt::transparent); // FIXME?: The sky appears black well before the actual end of twilight if the gradient is too slow (eg: latitudes above arctic circle)
             p.fillRect(QRectF(set, 0.0, du - set, pH), grad);
 
             grad.setStart(QPointF(rise, 0.0));
             grad.setFinalStop(QPointF(da, 0.0));
             p.fillRect(QRectF(da, 0.0, rise - da, pH), grad);
         }
     }
 
     p.fillRect(0, int(0.5 * pH), pW, int(0.5 * pH), KStarsData::Instance()->colorScheme()->colorNamed("HorzColor"));
 
     p.setClipping(false);
 
     // Add vertical line indicating "now"
     // Convert the current system clock time to the TZ corresponding to geo
     QTime t = geoLoc->UTtoLT(KStarsDateTime::currentDateTimeUtc()).time();
     double x = 12.0 + t.hour() + t.minute() / 60.0 + t.second() / 3600.0;
 
     while (x > 24.0)
         x -= 24.0;
 
     // Convert to screen pixel coords
     int ix = int(x * pW / 24.0);
 
     p.setPen(QPen(QBrush("white"), 2.0, Qt::DotLine));
     p.drawLine(ix, 0, ix, pH);
 
     QFont largeFont = p.font();
 
     largeFont.setPointSize(largeFont.pointSize() + 1);
     // Label this vertical line with the current time
     p.save();
     p.setFont(largeFont);
     p.translate(ix + 10, pH - 20);
     p.rotate(-90);
     // Short format necessary to avoid false time-zone labeling
     p.drawText(0, 0, QLocale().toString(t, QLocale::ShortFormat));
     p.restore();
     p.end();
 }
 
 KStarsDateTime AltVsTime::getDate()
 {
     //convert midnight local time to UT:
     QDateTime lt(avtUI->DateWidget->date(), QTime());
     return geo->LTtoUT(KStarsDateTime(lt));
 }
 
 double AltVsTime::getEpoch(const QString &eName)
 {
     //If Epoch field not a double, assume J2000
     bool ok;
     double epoch = eName.toDouble(&ok);
     if (!ok)
     {
         qCWarning(KSTARS) << "Invalid Epoch.  Assuming 2000.0.";
         return 2000.0;
     }
     return epoch;
 }
 
 void AltVsTime::setDawnDusk()
 {
     KStarsDateTime today = getDate();
     KSNumbers num(today.djd());
     CachingDms LST = geo->GSTtoLST(today.gst());
 
     KSSun sun;
     sun.updateCoords(&num, true, geo->lat(), &LST, true);
 
     /* TODO:
     double last_h = -12.0;
     double last_alt = findAltitude( &sun, last_h );
     double dawn = -13.0;
     double dusk = -13.0;
     double max_alt = -100.0;
     double min_alt = 100.0;
     for ( double h=-11.95; h<=12.0; h+=0.05 ) {
         double alt = findAltitude( &sun, h );
         bool asc = alt - last_alt > 0;
         if ( alt > max_alt )
             max_alt = alt;
         if ( alt < min_alt )
             min_alt = alt;
 
         if ( asc && last_alt <= -18.0 && alt >= -18.0 )
             dawn = h;
         if ( !asc && last_alt >= -18.0 && alt <= -18.0 )
             dusk = h;
 
         last_h   = h;
         last_alt = alt;
     }
 
     if ( dawn < -12.0 || dusk < -12.0 ) {
         da = -1.0;
         du = -1.0;
     } else {
         da = dawn / 24.0;
         du = ( dusk + 24.0 ) / 24.0;
     }
     avtUI->View->setDawnDuskTimes( da, du );
     avtUI->View->setMinMaxSunAlt( min_alt, max_alt );
     */
 }
 
 void AltVsTime::slotPrint()
 {
     QPainter p;            // Our painter object
     QPrinter printer;      // Our printer object
     QString str_legend;    // Text legend
     int text_height = 200; // Height of legend text zone in points
     QSize plot_size;       // Initial plot widget size
     QFont plot_font;       // Initial plot widget font
     int plot_font_size;    // Initial plot widget font size
 
     // Set printer resolution to 300 dpi
     printer.setResolution(300);
 
     // Open print dialog
     //QPointer<QPrintDialog> dialog( KdePrint::createPrintDialog( &printer, this ) );
     //QPointer<QPrintDialog> dialog( &printer, this );
     QPrintDialog dialog(&printer, this);
     dialog.setWindowTitle(i18n("Print elevation vs time plot"));
     if (dialog.exec() == QDialog::Accepted)
     {
         // Change mouse cursor
         QApplication::setOverrideCursor(Qt::WaitCursor);
 
         // Save plot widget font
         plot_font = avtUI->View->font();
         // Save plot widget font size
         plot_font_size = plot_font.pointSize();
         // Save calendar widget size
         plot_size = avtUI->View->size();
 
         // Set text legend
         str_legend = i18n("Elevation vs. Time Plot");
         str_legend += '\n';
         str_legend += geo->fullName();
         str_legend += " - ";
         str_legend += avtUI->DateWidget->date().toString("dd/MM/yyyy");
 
         // Create a rectangle for legend text zone
         QRect text_rect(0, 0, printer.width(), text_height);
 
         // Increase plot widget font size so it looks good in 300 dpi
         plot_font.setPointSize(plot_font_size * 2.5);
         avtUI->View->setFont(plot_font);
         // Increase plot widget size to fit the entire page
         avtUI->View->resize(printer.width(), printer.height() - text_height);
 
         // Create a pixmap and render plot widget into it
         QPixmap pixmap(avtUI->View->size());
         avtUI->View->render(&pixmap);
 
         // Begin painting on printer
         p.begin(&printer);
         // Draw legend
         p.drawText(text_rect, Qt::AlignLeft, str_legend);
         // Draw plot widget
         p.drawPixmap(0, text_height, pixmap);
         // Ending painting
         p.end();
 
         // Restore plot widget font size
         plot_font.setPointSize(plot_font_size);
         avtUI->View->setFont(plot_font);
         // Restore calendar widget size
         avtUI->View->resize(plot_size);
 
         // Restore mouse cursor
         QApplication::restoreOverrideCursor();
     }
     //delete dialog;
 }
 
 QString AltVsTime::getObjectName(const SkyObject *o, bool translated)
 {
     QString finalObjectName;
     if (o->name() == "star")
     {
         StarObject *s = (StarObject *)o;
 
         // JM: Enable HD Index stars to be added to the observing list.
         if (s->getHDIndex() != 0)
             finalObjectName = QString("HD %1").arg(QString::number(s->getHDIndex()));
     }
     else
         finalObjectName = translated ? o->translatedName() : o->name();
 
     return finalObjectName;
 }
diff --git a/kstars/tools/altvstime.h b/kstars/tools/altvstime.h
index 4c84d5f4b..41ce65829 100644
--- a/kstars/tools/altvstime.h
+++ b/kstars/tools/altvstime.h
@@ -1,209 +1,209 @@
 /***************************************************************************
                           altvstime.h  -  description
                              -------------------
     begin                : Mon Dec 23 2002
     copyright            : (C) 2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include <QList>
 #include <QDialog>
 
 #include "ui_altvstime.h"
 
 class QCPAbstractPlottable;
 class QCPItemPixmap;
 class QCPRange;
 class QMouseEvent;
 class QPixmap;
 
 class GeoLocation;
 class KStarsDateTime;
 class SkyObject;
 class SkyPoint;
 
 class AltVsTimeUI : public QFrame, public Ui::AltVsTime
 {
     Q_OBJECT
   public:
-    explicit AltVsTimeUI(QWidget *p = 0);
+    explicit AltVsTimeUI(QWidget *p = nullptr);
 };
 
 /**
  * @class AltVsTime
  * @short the Altitude vs. Time Tool.
  * Plot the altitude as a function of time for any list of
  * objects, as seen from any location, on any date.
  *
  * @author Jason Harris
  */
 class AltVsTime : public QDialog
 {
     Q_OBJECT
 
   public:
     /** Constructor */
     explicit AltVsTime(QWidget *parent = nullptr);
 
     /** Destructor */
     ~AltVsTime() override;
 
     /**
      * Determine the limits for the sideral time axis, using
      * the sidereal time at midnight for the current date
      * and location settings.
      */
     void setLSTLimits();
 
     /**
      * Set the AltVsTime Date according to the current Date
      * in the KStars main window.  Currently, this is only
      * used in the ctor to initialize the Date.
      */
     void showCurrentDate();
 
     /**
      * @return a KStarsDateTime object constructed from the
      * current setting in the Date widget.
      */
     KStarsDateTime getDate();
 
     /**
      * Determine the time of sunset and sunrise for the current
      * date and location settings.  Convert the times to doubles,
      * expressing the times as fractions of a full day.
      * Calls AVTPlotWidget::setSunRiseSetTimes() to send the
      * numbers to the plot widget.
      */
     void computeSunRiseSetTimes();
 
     /**
      * Parse a string as an epoch number.  If the string can't
      * be parsed, return 2000.0.
      * @param eName the epoch string to be parsed
      * @return the epoch number
      */
     double getEpoch(const QString &eName);
 
     /**
      * @short Add a SkyObject to the display.
      * Constructs a PLotObject representing the Alt-vs-time curve for the object.
      * @param o pointer to the SkyObject to be added
      * @param forceAdd if true, then the object will be added, even if there
      * is already a curve for the same coordinates.
      */
     void processObject(SkyObject *o, bool forceAdd = false);
 
     /**
      * @short Determine the altitude coordinate of a SkyPoint,
      * given an hour of the day.
      *
      * This is called for every 30-minute interval in the displayed Day,
      * in order to construct the altitude curve for a given object.
      * @param p the skypoint whose altitude is to be found
      * @param hour the time in the displayed day, expressed in hours
      * @return the Altitude, expresse in degrees
      */
     double findAltitude(SkyPoint *p, double hour);
 
     /**
      * @short get object name. If star has no name, generate a name based on catalog number.
      * @param translated set to true if the translated name is required.
      */
     QString getObjectName(const SkyObject *o, bool translated = true);
 
     void drawGradient();
 
   public slots:
     /** @short Update the plot to reflec new Date and Location settings. */
     void slotUpdateDateLoc();
 
     /** @short Clear the list of displayed objects. */
     void slotClear();
 
     /** @short Show information from the curve as a tooltip. */
     void plotMousePress(QCPAbstractPlottable *abstractPlottable, int dataIndex, QMouseEvent *event);
 
     /** @short Update the X axis on Zoom and Drag. */
     void onXRangeChanged(const QCPRange &range);
 
     /** @short Update the Y axis on Zoom and Drag. */
     void onYRangeChanged(const QCPRange &range);
 
     /** @short Compute the altitude for a certain time. */
     void slotComputeAltitudeByTime();
 
     /** @short Mark the rise time on the curve. */
     void slotMarkRiseTime();
 
     /** @short Mark the set time on the curve. */
     void slotMarkSetTime();
 
     /** @short Mark the transit time on the curve. */
     void slotMarkTransitTime();
 
     /** @short Draw the white vertical line on click. */
     void mouseOverLine(QMouseEvent *event);
 
     /** @short Clear the edit boxes for specifying a new object. */
     void slotClearBoxes();
 
     /**
      * @short Add an object to the list of displayed objects, according
      * to the data entered in the edit boxes.
      */
     void slotAddSource();
 
     /**
      * @short Launch the Find Object window to select a new object for
      * the list of displayed objects.
      */
     void slotBrowseObject();
 
     /** @short Launch the Location dialog to choose a new location. */
     void slotChooseCity();
 
     /**
      * @short Move input keyboard focus to the next logical widget.
      * We need a separate slot for this because we are intercepting
      * Enter key events, which close the window by default, to
      * advance input focus instead (when the Enter events occur in
      * certain Edit boxes).
      */
     void slotAdvanceFocus();
 
     /**
      * Update the plot to highlight the altitude curve of the objects
      * which is highlighted in the listbox.
      */
     void slotHighlight(int);
 
     /** @short Print plot widget */
     void slotPrint();
 
   private:
     /** @short find start of dawn, end of dusk, maximum and minimum elevation of the sun */
     void setDawnDusk();
 
     AltVsTimeUI *avtUI { nullptr };
 
     GeoLocation *geo { nullptr };
     QList<SkyObject *> pList;
     QList<SkyObject *> deleteList;
     int DayOffset { 0 };
     int minAlt { 0 };
     int maxAlt { 0 };
     QCPItemPixmap *background { nullptr };
     QPixmap *gradient { nullptr };
 };
diff --git a/kstars/tools/astrocalc.cpp b/kstars/tools/astrocalc.cpp
index f7ceb6f38..cb1a4fae3 100644
--- a/kstars/tools/astrocalc.cpp
+++ b/kstars/tools/astrocalc.cpp
@@ -1,239 +1,239 @@
 /***************************************************************************
                           astrocalc.cpp  -  description
                              -------------------
     begin                : wed dec 19 16:20:11 CET 2002
     copyright            : (C) 2001-2005 by Pablo de Vicente
     email                : p.devicente@wanadoo.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "astrocalc.h"
 
 #include "modcalcjd.h"
 #include "modcalcgeodcoord.h"
 #include "modcalcgalcoord.h"
 #include "modcalcsidtime.h"
 #include "modcalcapcoord.h"
 #include "modcalcdaylength.h"
 #include "modcalcaltaz.h"
 #include "modcalcplanets.h"
 #include "modcalceclipticcoords.h"
 #include "modcalcangdist.h"
 #include "modcalcvizequinox.h"
 #include "modcalcvlsr.h"
 #include "conjunctions.h"
 
 #include <QDialogButtonBox>
 #include <QSplitter>
 #include <QStackedWidget>
 #include <QTextEdit>
 #include <QTreeWidget>
 #include <QTreeWidgetItem>
 
 AstroCalc::AstroCalc(QWidget *parent) : QDialog(parent)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
 
     // List of messages. Maybe there is better place for it...
     QString message      = i18n("<QT>"
                            "<H2>KStars Astrocalculator</H2>"
                            "<P>"
                            "The KStars Astrocalculator contains several <B>modules</b> "
                            "which perform a variety of astronomy-related calculations.  "
                            "The modules are organized into several categories: "
                            "<UL>"
                            "<LI><B>Time calculators: </B>"
                            "Convert between time systems, and predict the timing of celestial events</LI>"
                            "<LI><B>Coordinate converters: </B>"
                            "Convert between various coordinate systems</LI>"
                            "<LI><B>Solar system: </B>"
                            "Predict the position of any planet, from a given location on Earth at a given time</LI>"
                            "</UL>"
                            "</QT>");
     QString messageTime  = i18n("<QT>"
                                "Section which includes algorithms for computing time ephemeris"
                                "<UL><LI>"
                                "<B>Julian Day:</B> Julian Day/Calendar conversion"
                                "</LI><LI>"
                                "<B>Sidereal Time:</B> Sidereal/Universal time conversion"
                                "</LI><LI>"
                                "<B>Almanac:</B> Rise/Set/Transit timing and position data "
                                "for the Sun and Moon"
                                "</LI><LI>"
                                "<B>Equinoxes & Solstices:</B> Equinoxes, Solstices and duration of the "
                                "seasons"
                                "</LI></UL>"
                                "</QT>");
     QString messageCoord = i18n("<QT>"
                                 "Section with algorithms for the conversion of "
                                 "different astronomical systems of coordinates"
                                 "<UL><LI>"
                                 "<B>Galactic:</B> Galactic/Equatorial coordinates conversion"
                                 "</LI><LI>"
                                 "<B>Apparent:</B> Computation of current equatorial coordinates"
                                 " from a given epoch"
                                 "</LI><LI>"
                                 "<B>Ecliptic:</B> Ecliptic/Equatorial coordinates conversion"
                                 "</LI><LI>"
                                 "<B>Horizontal:</B> Computation of azimuth and elevation for a "
                                 "given source, time, and location on the Earth"
                                 "</LI><LI>"
                                 "<B>Angular Distance:</B> Computation of angular distance between "
                                 "two objects whose positions are given in equatorial coordinates"
                                 "</LI><LI>"
                                 "<B>Geodetic Coords:</B> Geodetic/XYZ coordinate conversion"
                                 "</LI><LI>"
                                 "<B>LSR Velocity:</B> Computation of the heliocentric, geocentric "
                                 "and topocentric radial velocity of a source from its LSR velocity"
                                 "</LI></UL>"
                                 "</QT>");
     QString messageSolar = i18n("<QT>"
                                 "Section with algorithms regarding information "
                                 "on solar system bodies coordinates and times"
                                 "<UL><LI>"
                                 "<B>Planets Coords:</B> Coordinates for the planets, moon and sun "
                                 "at a given time and from a given position on Earth "
                                 "</LI></UL>"
                                 "</QT>");
 
     QSplitter *split = new QSplitter(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(split);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     setWindowTitle(i18n("Calculator"));
 
     // Create navigation panel
     navigationPanel = new QTreeWidget(split);
     navigationPanel->setColumnCount(1);
     navigationPanel->setHeaderLabels(QStringList(i18n("Calculator modules")));
     navigationPanel->setSortingEnabled(false);
     //FIXME: Would be better to make the navigationPanel fit its contents,
     //but I wasn't able to make it work
     navigationPanel->setMinimumWidth(200);
 
     acStack = new QStackedWidget(split);
 
     splashScreen = new QTextEdit(message, acStack);
     splashScreen->setReadOnly(true);
     //FIXME: Minimum size is set to resize calculator to correct size
     //when no modules is loaded. This is simply biggest size of
     //calculator modules. I think it should be set in more cleverly.
     splashScreen->setMinimumSize(640, 550);
     acStack->addWidget(splashScreen);
 
     // Load icons
     // JM 2016-10-02: Those are missing, disabling the icons for now
     /*
     QIcon jdIcon = QIcon ("jd.png");
     QIcon geodIcon = QIcon ("geodetic.png");
     QIcon solarIcon = QIcon ("geodetic.png");
     // QIcon sunsetIcon = QIcon ("sunset.png"); // Its usage is commented out.
     QIcon timeIcon = QIcon ("sunclock.png");*/
 
     /* Populate the tree widget and widget stack */
     // Time-related entries
     QTreeWidgetItem *timeItem = addTreeTopItem(navigationPanel, i18n("Time Calculators"), messageTime);
     //timeItem->setIcon(0,timeIcon);
 
     //addTreeItem<modCalcJD>       (timeItem, i18n("Julian Day"))->setIcon(0,jdIcon);
     addTreeItem<modCalcJD>(timeItem, i18n("Julian Day"));
     addTreeItem<modCalcSidTime>(timeItem, i18n("Sidereal Time"));
     addTreeItem<modCalcDayLength>(timeItem, i18n("Almanac"));
     addTreeItem<modCalcEquinox>(timeItem, i18n("Equinoxes & Solstices"));
     //  dayItem->setIcon(0,sunsetIcon);
 
     // Coordinate-related entries
     QTreeWidgetItem *coordItem = addTreeTopItem(navigationPanel, i18n("Coordinate Converters"), messageCoord);
     addTreeItem<modCalcGalCoord>(coordItem, i18n("Equatorial/Galactic"));
     addTreeItem<modCalcApCoord>(coordItem, i18n("Apparent Coordinates"));
     addTreeItem<modCalcAltAz>(coordItem, i18n("Horizontal Coordinates"));
     addTreeItem<modCalcEclCoords>(coordItem, i18n("Ecliptic Coordinates"));
     addTreeItem<modCalcAngDist>(coordItem, i18n("Angular Distance"));
     addTreeItem<modCalcGeodCoord>(coordItem, i18n("Geodetic Coordinates"));
     addTreeItem<modCalcVlsr>(coordItem, i18n("LSR Velocity"));
 
     // Solar System related entries
     QTreeWidgetItem *solarItem = addTreeTopItem(navigationPanel, i18n("Solar System"), messageSolar);
     //solarItem->setIcon(0,solarIcon);
     addTreeItem<modCalcPlanets>(solarItem, i18n("Planets Coordinates"));
     addTreeItem<ConjunctionsTool>(solarItem, i18n("Conjunctions"));
 
     acStack->setCurrentWidget(splashScreen);
     connect(navigationPanel, SIGNAL(itemClicked(QTreeWidgetItem*,int)), this,
             SLOT(slotItemSelection(QTreeWidgetItem*)));
 }
 
 template <typename T>
 QWidget *AstroCalc::addToStack()
 {
     T *t = new T(acStack);
     acStack->addWidget(t);
     return t;
 }
 
 template <typename T>
 QTreeWidgetItem *AstroCalc::addTreeItem(QTreeWidgetItem *parent, const QString &title)
 {
     QTreeWidgetItem *item = new QTreeWidgetItem(parent, QStringList(title));
     dispatchTable.insert(item, WidgetThunk(this, &AstroCalc::addToStack<T>));
     return item;
 }
 
 QTreeWidgetItem *AstroCalc::addTreeTopItem(QTreeWidget *parent, const QString &title, const QString &html)
 {
     QTreeWidgetItem *item = new QTreeWidgetItem(parent, QStringList(title));
 
     htmlTable.insert(item, html);
     return item;
 }
 
 void AstroCalc::slotItemSelection(QTreeWidgetItem *item)
 {
-    if (item == 0)
+    if (item == nullptr)
         return;
     // Lookup in HTML table
     QMap<QTreeWidgetItem *, QString>::iterator iterHTML = htmlTable.find(item);
     if (iterHTML != htmlTable.end())
     {
         splashScreen->setHtml(*iterHTML);
         acStack->setCurrentWidget(splashScreen);
         return;
     }
     // Lookup in frames table
     QMap<QTreeWidgetItem *, WidgetThunk>::iterator iter = dispatchTable.find(item);
     if (iter != dispatchTable.end())
     {
         acStack->setCurrentWidget(iter->eval());
     }
 }
 
 QSize AstroCalc::sizeHint() const
 {
     return QSize(640, 430);
 }
 
 QWidget *AstroCalc::WidgetThunk::eval()
 {
-    if (widget == 0)
+    if (widget == nullptr)
     {
         // This is pointer to member function call.
         widget = (calc->*func)();
     }
     return widget;
 }
diff --git a/kstars/tools/astrocalc.h b/kstars/tools/astrocalc.h
index 1050b62f2..9fd50ab9f 100644
--- a/kstars/tools/astrocalc.h
+++ b/kstars/tools/astrocalc.h
@@ -1,111 +1,111 @@
 /***************************************************************************
                           astrocalc.h  -  description
                              -------------------
     begin                : wed dec 19 16:20:11 CET 2002
     copyright            : (C) 2001-2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include <QMap>
 #include <QString>
 #include <QDialog>
 
 class QStackedWidget;
 class QTextEdit;
 class QTreeWidget;
 class QTreeWidgetItem;
 
 /**
  * @class AstroCalc is the base class for the KStars astronomical calculator
  *
  * @author: Pablo de Vicente
  * @version 0.9
  */
 class AstroCalc : public QDialog
 {
     Q_OBJECT
 
   public:
     explicit AstroCalc(QWidget *parent = nullptr);
 
     /** @return suggested size of calculator window. */
     QSize sizeHint() const override;
   public slots:
      // Q: Why is this public when we don't have access to navigationPanel anyway?
      // Also doesn't seem to be used from outside -- asimha
     /** Display calculator module or help text based on item selected. */
     void slotItemSelection(QTreeWidgetItem *it);
 
   private:
     /** Pointer to function which return QWidget */
     typedef QWidget *(AstroCalc::*WidgetConstructor)();
     /**
      * Data structure used for lazy widget construction. This class
      * construct widget when it requested.
      */
     class WidgetThunk
     {
       public:
         /**
          * Create thunk
          * @param acalc  pointer to class.
          * @param f      function which construct widget.
          */
-        WidgetThunk(AstroCalc *acalc, const WidgetConstructor& f) : widget(0), calc(acalc), func(f) { }
+        WidgetThunk(AstroCalc *acalc, const WidgetConstructor& f) : widget(nullptr), calc(acalc), func(f) { }
         /**
          * Request widget.
          * @return newly created widget or cached value.
          */
         QWidget *eval();
 
       private:
         /// Cached value
         QWidget *widget { nullptr };
         /// Pointer to calculator
         AstroCalc *calc { nullptr };
         /// Function call to construct the widget.
         WidgetConstructor func;
     };
 
     /**
      * Create widget of type T and put it to widget stack. Widget must
      * have construtor of type T(QWidget*). Returns constructed widget.
      */
     template <typename T>
     inline QWidget *addToStack();
 
     /**
      * Add top level item to navigation panel. At the same time adds item to htmlTable
      * @param title name of item
      * @param html  string to be displayed in splash screen
      */
     QTreeWidgetItem *addTreeTopItem(QTreeWidget *parent, const QString &title, const QString &html);
 
     /**
      * Add item to navigation panel. At the same time adds item to dispatchTable Template
      * parameter is type of widget to be constructed and added to widget stack. It must
      * have T() constructor.
      * @param title  name of item
      */
     template <typename T>
     QTreeWidgetItem *addTreeItem(QTreeWidgetItem *parent, const QString &title);
 
     /** Lookup table for help texts. Maps navpanel item to help text. */
     QMap<QTreeWidgetItem *, QString> htmlTable;
     /** Lookup table for widgets. Maps navpanel item to widget to be displayed. */
     QMap<QTreeWidgetItem *, WidgetThunk> dispatchTable;
     QTreeWidget *navigationPanel { nullptr };
     QStackedWidget *acStack { nullptr };
     QTextEdit *splashScreen { nullptr };
 };
diff --git a/kstars/tools/calendarwidget.h b/kstars/tools/calendarwidget.h
index aadb021f1..3373824c4 100644
--- a/kstars/tools/calendarwidget.h
+++ b/kstars/tools/calendarwidget.h
@@ -1,54 +1,54 @@
 /***************************************************************************
                           calendarwidget.h  -  description
                              -------------------
     begin                : Wed Jul 16 2008
     copyright            : (C) 2008 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef CALENDARWIDGET_H_
 #define CALENDARWIDGET_H_
 
 #include <QDate>
 #include <kplotwidget.h>
 
 /** @class CalendarWidget
  *@short An extension of the KPlotWidget for the SkyCalendar tool.
  */
 class CalendarWidget : public KPlotWidget
 {
     Q_OBJECT
   public:
-    explicit CalendarWidget(QWidget *parent = 0);
+    explicit CalendarWidget(QWidget *parent = nullptr);
     void setHorizon();
     inline float getRiseTime(int i) { return riseTimeList.at(i); }
     inline float getSetTime(int i) { return setTimeList.at(i); }
 
   protected:
     void paintEvent(QPaintEvent *e) override;
 
   private:
     void drawHorizon(QPainter *p);
     void drawAxes(QPainter *p) override;
 
     QList<QDate> dateList;
     QList<float> riseTimeList;
     QList<float> setTimeList;
 
     float minSTime;
     float maxRTime;
 
     QPolygonF polySunRise;
     QPolygonF polySunSet;
 };
 
 #endif
diff --git a/kstars/tools/conjunctions.cpp b/kstars/tools/conjunctions.cpp
index ac159e533..8e98f95f4 100644
--- a/kstars/tools/conjunctions.cpp
+++ b/kstars/tools/conjunctions.cpp
@@ -1,409 +1,409 @@
 /***************************************************************************
                           conjunctions.cpp  -  Conjunctions Tool
                              -------------------
     begin                : Sun 20th Apr 2008
     copyright            : (C) 2008 Akarsh Simha
     email                : akarshsimha@gmail.com
 ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  * Much of the code here is taken from Pablo de Vicente's                  *
  * modcalcplanets.cpp                                                      *
  *                                                                         *
  ***************************************************************************/
 
 #include "conjunctions.h"
 
 #include "geolocation.h"
 #include "ksconjunct.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "dialogs/finddialog.h"
 #include "dialogs/locationdialog.h"
 #include "skycomponents/skymapcomposite.h"
 #include "skyobjects/kscomet.h"
 #include "skyobjects/kspluto.h"
 
 #include <QFileDialog>
 #include <QProgressDialog>
 #include <QStandardItemModel>
 
 ConjunctionsTool::ConjunctionsTool(QWidget *parentSplit) : QFrame(parentSplit)
 {
     setupUi(this);
 
     KStarsData *kd = KStarsData::Instance();
     KStarsDateTime dtStart(KStarsDateTime::currentDateTime());
     KStarsDateTime dtStop(dtStart.djd() + 365.24); // TODO: Refine
 
     //startDate -> setDateTime( dtStart.dateTime() );
     //stopDate -> setDateTime( dtStop.dateTime() );
     //TODO Check if this change works
     startDate->setDateTime(dtStart);
     stopDate->setDateTime(dtStop);
 
     geoPlace = kd->geo();
     LocationButton->setText(geoPlace->fullName());
 
     // Init filter type combobox
     FilterTypeComboBox->addItem(i18n("Single Object..."));
     FilterTypeComboBox->addItem(i18n("Any"));
     FilterTypeComboBox->addItem(i18n("Stars"));
     FilterTypeComboBox->addItem(i18n("Solar System"));
     FilterTypeComboBox->addItem(i18n("Planets"));
     FilterTypeComboBox->addItem(i18n("Comets"));
     FilterTypeComboBox->addItem(i18n("Asteroids"));
     FilterTypeComboBox->addItem(i18n("Open Clusters"));
     FilterTypeComboBox->addItem(i18n("Globular Clusters"));
     FilterTypeComboBox->addItem(i18n("Gaseous Nebulae"));
     FilterTypeComboBox->addItem(i18n("Planetary Nebulae"));
     FilterTypeComboBox->addItem(i18n("Galaxies"));
 
     pNames[KSPlanetBase::MERCURY] = i18n("Mercury");
     pNames[KSPlanetBase::VENUS]   = i18n("Venus");
     pNames[KSPlanetBase::MARS]    = i18n("Mars");
     pNames[KSPlanetBase::JUPITER] = i18n("Jupiter");
     pNames[KSPlanetBase::SATURN]  = i18n("Saturn");
     pNames[KSPlanetBase::URANUS]  = i18n("Uranus");
     pNames[KSPlanetBase::NEPTUNE] = i18n("Neptune");
     //pNames[KSPlanetBase::PLUTO] = i18n("Pluto");
     pNames[KSPlanetBase::SUN]  = i18n("Sun");
     pNames[KSPlanetBase::MOON] = i18n("Moon");
 
     for (int i = 0; i < KSPlanetBase::UNKNOWN_PLANET; ++i)
     {
         //      Obj1ComboBox->insertItem( i, pNames[i] );
         Obj2ComboBox->insertItem(i, pNames[i]);
     }
 
     // Initialize the Maximum Separation box to 1 degree
     maxSeparationBox->setDegType(true);
     maxSeparationBox->setDMS("01 00 00.0");
 
     //Set up the Table Views
     m_Model = new QStandardItemModel(0, 5, this);
     m_Model->setHorizontalHeaderLabels(QStringList() << i18n("Conjunction/Opposition") << i18n("Date & Time (UT)")
                                                      << i18n("Object 1") << i18n("Object 2") << i18n("Separation"));
     m_SortModel = new QSortFilterProxyModel(this);
     m_SortModel->setSourceModel(m_Model);
     OutputList->setModel(m_SortModel);
     OutputList->setSortingEnabled(true);
     OutputList->horizontalHeader()->setStretchLastSection(true);
     OutputList->horizontalHeader()->setSectionResizeMode(QHeaderView::Interactive);
     OutputList->horizontalHeader()->resizeSection(2, 100);
     OutputList->horizontalHeader()->resizeSection(3, 100);
     OutputList->horizontalHeader()->resizeSection(4, 120); //is it bad way to fix default size of columns ?
 
     //FilterEdit->showClearButton = true;
     ClearFilterButton->setIcon(QIcon::fromTheme("edit-clear", QIcon(":/icons/breeze/default/edit-clear.svg")));
 
     // signals and slots connections
     connect(LocationButton, SIGNAL(clicked()), this, SLOT(slotLocation()));
     connect(Obj1FindButton, SIGNAL(clicked()), this, SLOT(slotFindObject()));
     connect(ComputeButton, SIGNAL(clicked()), this, SLOT(slotCompute()));
     connect(FilterTypeComboBox, SIGNAL(currentIndexChanged(int)), SLOT(slotFilterType(int)));
     connect(ClearButton, SIGNAL(clicked()), this, SLOT(slotClear()));
     connect(ExportButton, SIGNAL(clicked()), this, SLOT(slotExport()));
     connect(OutputList, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(slotGoto()));
     connect(ClearFilterButton, SIGNAL(clicked()), FilterEdit, SLOT(clear()));
     connect(FilterEdit, SIGNAL(textChanged(QString)), this, SLOT(slotFilterReg(QString)));
 
     show();
 }
 
 ConjunctionsTool::~ConjunctionsTool()
 {
 }
 
 void ConjunctionsTool::slotGoto()
 {
     int index      = m_SortModel->mapToSource(OutputList->currentIndex()).row(); // Get the number of the line
     long double jd = outputJDList.value(index);
     KStarsDateTime dt;
     KStars *ks       = KStars::Instance();
     KStarsData *data = KStarsData::Instance();
     SkyMap *map      = ks->map();
 
     // Show conjunction
     data->setLocation(*geoPlace);
     dt.setDJD(jd);
     data->changeDateTime(dt);
     map->setClickedObject(data->skyComposite()->findByName(m_Model->data(m_Model->index(index, 2)).toString()));
     map->setClickedPoint(map->clickedObject());
     map->slotCenter();
 }
 
 void ConjunctionsTool::slotFindObject()
 {
     QPointer<FindDialog> fd = new FindDialog(KStars::Instance());
     if (fd->exec() == QDialog::Accepted)
     {
         Object1.reset();
         if (!fd->targetObject())
             return;
         Object1.reset(fd->targetObject()->clone());
         if (Object1.get() != nullptr)
             Obj1FindButton->setText(Object1->name());
     }
     delete fd;
 }
 
 void ConjunctionsTool::slotLocation()
 {
     QPointer<LocationDialog> ld(new LocationDialog(this));
     if (ld->exec() == QDialog::Accepted && ld)
     {
         geoPlace = ld->selectedCity();
         LocationButton->setText(geoPlace->fullName());
     }
     delete ld;
 }
 
 void ConjunctionsTool::slotFilterType(int)
 {
     // Disable find button if the user select an object type
     if (FilterTypeComboBox->currentIndex() == 0)
         Obj1FindButton->setEnabled(true);
     else
         Obj1FindButton->setEnabled(false);
 }
 
 void ConjunctionsTool::slotClear()
 {
     m_Model->setRowCount(0);
     outputJDList.clear();
     m_index = 0;
 }
 
 void ConjunctionsTool::slotExport()
 {
     int i, j;
     QByteArray line;
 
     //QFile file( KFileDialog::getSaveFileName( QDir::homePath(), "*|All files", this, "Save Conjunctions" ) );
-    QFile file(QFileDialog::getSaveFileName(0, i18n("Save Conjunctions"), QDir::homePath(), "*|All files"));
+    QFile file(QFileDialog::getSaveFileName(nullptr, i18n("Save Conjunctions"), QDir::homePath(), "*|All files"));
 
     file.open(QIODevice::WriteOnly | QIODevice::Text);
 
     for (i = 0; i < m_Model->rowCount(); ++i)
     {
         for (j = 0; j < m_Model->columnCount(); ++j)
         {
             line.append(m_Model->data(m_Model->index(i, j)).toByteArray());
             if (j < m_Model->columnCount() - 1)
                 line.append(";");
             else
                 line.append("\n");
         }
         file.write(line);
         line.clear();
     }
 
     file.close();
 }
 
 void ConjunctionsTool::slotFilterReg(const QString &filter)
 {
     m_SortModel->setFilterRegExp(QRegExp(filter, Qt::CaseInsensitive, QRegExp::RegExp));
     m_SortModel->setFilterKeyColumn(-1);
 }
 
 void ConjunctionsTool::slotCompute(void)
 {
     KStarsDateTime dtStart(startDate->dateTime()); // Start date
     KStarsDateTime dtStop(stopDate->dateTime());  // Stop date
     long double startJD    = dtStart.djd();         // Start julian day
     long double stopJD     = dtStop.djd();          // Stop julian day
     bool opposition        = false;                 // true=opposition, false=conjunction
     if (Opposition->currentIndex())
         opposition = true;
     QStringList objects; // List of sky object used as Object1
     KStarsData *data = KStarsData::Instance();
     int progress     = 0;
 
     // Check if we have a valid angle in maxSeparationBox
     dms maxSeparation(0.0);
     bool ok;
     maxSeparation = maxSeparationBox->createDms(true, &ok);
 
     if (!ok)
     {
-        KMessageBox::sorry(0, i18n("Maximum separation entered is not a valid angle. Use the What's this help feature "
+        KMessageBox::sorry(nullptr, i18n("Maximum separation entered is not a valid angle. Use the What's this help feature "
                                    "for information on how to enter a valid angle"));
         return;
     }
 
     // Check if Object1 and Object2 are set
     if (FilterTypeComboBox->currentIndex() == 0 && Object1.get() == nullptr)
     {
         KMessageBox::sorry(
-            0, i18n("Please select an object to check conjunctions with, by clicking on the \'Find Object\' button."));
+            nullptr, i18n("Please select an object to check conjunctions with, by clicking on the \'Find Object\' button."));
         return;
     }
     Object2.reset(KSPlanetBase::createPlanet(Obj2ComboBox->currentIndex()));
     if (FilterTypeComboBox->currentIndex() == 0 && Object1->name() == Object2->name())
     {
         // FIXME: Must free the created Objects
-        KMessageBox::sorry(0, i18n("Please select two different objects to check conjunctions with."));
+        KMessageBox::sorry(nullptr, i18n("Please select two different objects to check conjunctions with."));
         return;
     }
 
     // Init KSConjunct object
     KSConjunct ksc;
     connect(&ksc, SIGNAL(madeProgress(int)), this, SLOT(showProgress(int)));
     ksc.setGeoLocation(geoPlace);
 
     switch (FilterTypeComboBox->currentIndex())
     {
         case 1: // All object types
             foreach (int type, data->skyComposite()->objectNames().keys())
                 objects += data->skyComposite()->objectNames(type);
             break;
         case 2: // Stars
             objects += data->skyComposite()->objectNames(SkyObject::STAR);
             objects += data->skyComposite()->objectNames(SkyObject::CATALOG_STAR);
             break;
         case 3: // Solar system
             objects += data->skyComposite()->objectNames(SkyObject::PLANET);
             objects += data->skyComposite()->objectNames(SkyObject::COMET);
             objects += data->skyComposite()->objectNames(SkyObject::ASTEROID);
             objects += data->skyComposite()->objectNames(SkyObject::MOON);
             objects += i18n("Sun");
             // Remove Object2  planet
             objects.removeAll(Object2->name());
             break;
         case 4: // Planet
             objects += data->skyComposite()->objectNames(SkyObject::PLANET);
             // Remove Object2  planet
             objects.removeAll(Object2->name());
             break;
         case 5: // Comet
             objects += data->skyComposite()->objectNames(SkyObject::COMET);
             break;
         case 6: // Ateroid
             objects += data->skyComposite()->objectNames(SkyObject::ASTEROID);
             break;
         case 7: // Open Clusters
             objects = data->skyComposite()->objectNames(SkyObject::OPEN_CLUSTER);
             break;
         case 8: // Open Clusters
             objects = data->skyComposite()->objectNames(SkyObject::GLOBULAR_CLUSTER);
             break;
         case 9: // Gaseous nebulae
             objects = data->skyComposite()->objectNames(SkyObject::GASEOUS_NEBULA);
             break;
         case 10: // Planetary nebula
             objects = data->skyComposite()->objectNames(SkyObject::PLANETARY_NEBULA);
             break;
         case 11: // Galaxies
             objects = data->skyComposite()->objectNames(SkyObject::GALAXY);
             break;
     }
 
     // Remove all Jupiter and Saturn moons
     // KStars crash if we compute a conjunction between a planet and one of this moon
     if (FilterTypeComboBox->currentIndex() == 1 || FilterTypeComboBox->currentIndex() == 3 ||
         FilterTypeComboBox->currentIndex() == 6)
     {
         objects.removeAll("Io");
         objects.removeAll("Europa");
         objects.removeAll("Ganymede");
         objects.removeAll("Callisto");
         objects.removeAll("Mimas");
         objects.removeAll("Enceladus");
         objects.removeAll("Tethys");
         objects.removeAll("Dione");
         objects.removeAll("Rhea");
         objects.removeAll("Titan");
         objects.removeAll("Hyperion");
         objects.removeAll("Iapetus");
     }
 
     if (FilterTypeComboBox->currentIndex() != 0)
     {
         // Show a progress dialog while processing
         QProgressDialog progressDlg(i18n("Compute conjunction..."), i18n("Abort"), 0, objects.count(), this);
         progressDlg.setWindowModality(Qt::WindowModal);
         progressDlg.setValue(0);
 
         for (auto &object : objects)
         {
             // If the user click on the 'cancel' button
             if (progressDlg.wasCanceled())
                 break;
 
             // Update progress dialog
             ++progress;
             progressDlg.setValue(progress);
             progressDlg.setLabelText(i18n("Compute conjunction between %1 and %2", Object2->name(), object));
 
             // Compute conjuction
             Object1.reset(data->skyComposite()->findByName(object));
             showConjunctions(ksc.findClosestApproach(*Object1, *Object2, startJD, stopJD, maxSeparation, opposition),
                              object, Object2->name());
         }
 
         progressDlg.setValue(objects.count());
     }
     else
     {
         // Change cursor while we search for conjunction
         QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
 
         ComputeStack->setCurrentIndex(1);
         showConjunctions(ksc.findClosestApproach(*Object1, *Object2, startJD, stopJD, maxSeparation, opposition),
                          Object1->name(), Object2->name());
         ComputeStack->setCurrentIndex(0);
 
         // Restore cursor
         QApplication::restoreOverrideCursor();
     }
 
     Object2.reset();
 }
 
 void ConjunctionsTool::showProgress(int n)
 {
     progress->setValue(n);
 }
 
 void ConjunctionsTool::showConjunctions(const QMap<long double, dms> &conjunctionlist, const QString &object1,
                                         const QString &object2)
 {
     KStarsDateTime dt;
     QList<QStandardItem *> itemList;
 
     for (auto it = conjunctionlist.constBegin(); it != conjunctionlist.constEnd(); ++it)
     {
         dt.setDJD(it.key());
         QStandardItem *typeItem;
 
         if (!Opposition->currentIndex())
             typeItem = new QStandardItem(i18n("Conjunction"));
         else
             typeItem = new QStandardItem(i18n("Opposition"));
 
         itemList << typeItem
                  //FIXME TODO is this ISO date? is there a ready format to use?
                  //<< new QStandardItem( QLocale().toString( dt.dateTime(), "YYYY-MM-DDTHH:mm:SS" ) )
                  //<< new QStandardItem( QLocale().toString( dt, Qt::ISODate) )
                  << new QStandardItem(dt.toString(Qt::ISODate)) << new QStandardItem(object1)
                  << new QStandardItem(object2) << new QStandardItem(it.value().toDMSString());
         m_Model->appendRow(itemList);
         itemList.clear();
 
         outputJDList.insert(m_index, it.key());
         ++m_index;
     }
 }
diff --git a/kstars/tools/exporteyepieceview.h b/kstars/tools/exporteyepieceview.h
index af45b0e3b..86793db39 100644
--- a/kstars/tools/exporteyepieceview.h
+++ b/kstars/tools/exporteyepieceview.h
@@ -1,78 +1,78 @@
 /***************************************************************************
                exporteyepieceview.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun 17 Jan 2016 21:36:25 CST
     copyright            : (c) 2016 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
 ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "kstarsdatetime.h"
 
 #include <QDialog>
 #include <QImage>
 
 #include <memory>
 
 class QComboBox;
 class QLabel;
 class QPixmap;
 
 class SkyPoint;
 
 /**
  * @class ExportEyepieceView
  * @short Dialog to export the eyepiece view as an image, with some annotations for field-use
  *
  * @author Akarsh Simha <akarsh@kde.org>
  */
 class ExportEyepieceView : public QDialog
 {
     Q_OBJECT;
 
   public:
     /**
      * @short Constructor
      * @note Class self-destructs (commits suicide). Invoke and forget.
      */
     ExportEyepieceView(const SkyPoint *_sp, const KStarsDateTime &dt, const QPixmap *renderImage,
-                       const QPixmap *renderChart, QWidget *parent = 0);
+                       const QPixmap *renderChart, QWidget *parent = nullptr);
 
   public slots:
 
     /** Change the tick overlay scheme */
     void slotOverlayTicks(int overlayType);
 
     /** Save the image (export), and then close the dialog by calling slotCloseDialog() */
     void slotSaveImage();
 
     /** Closes the dialog, and sets up deleteLater() so that the dialog is destructed. */
     void slotCloseDialog();
 
   private slots:
 
     /** Render the output */
     void render();
 
   private:
     QLabel *m_outputDisplay { nullptr };
     QLabel *m_tickWarningLabel { nullptr };
     QComboBox *m_tickConfigCombo { nullptr };
 
     KStarsDateTime m_dt;
     std::unique_ptr<SkyPoint> m_sp;
     std::unique_ptr<QPixmap> m_renderImage;
     std::unique_ptr<QPixmap> m_renderChart;
     QImage m_output;
     int m_tickConfig { 0 };
 };
diff --git a/kstars/tools/eyepiecefield.cpp b/kstars/tools/eyepiecefield.cpp
index 43eb5f764..c042349d7 100644
--- a/kstars/tools/eyepiecefield.cpp
+++ b/kstars/tools/eyepiecefield.cpp
@@ -1,635 +1,635 @@
 /***************************************************************************
                 eyepiecefield.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Fri 30 May 2014 15:07:46 CDT
     copyright            : (c) 2014 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "eyepiecefield.h"
 
 #include "exporteyepieceview.h"
 #include "fov.h"
 #include "ksdssdownloader.h"
 #include "kstars.h"
 #include "Options.h"
 #include "skymap.h"
 #include "skyqpainter.h"
 
 #include <QBitmap>
 #include <QCheckBox>
 #include <QComboBox>
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QPushButton>
 #include <QSlider>
 #include <QSvgGenerator>
 #include <QSvgRenderer>
 #include <QVBoxLayout>
 
 #include <kstars_debug.h>
 
 EyepieceField::EyepieceField(QWidget *parent) : QDialog(parent)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
 
     setWindowTitle(i18n("Eyepiece Field View"));
 
-    m_sp         = 0;
-    m_dt         = 0;
-    m_currentFOV = 0;
+    m_sp         = nullptr;
+    m_dt         = nullptr;
+    m_currentFOV = nullptr;
     m_fovWidth = m_fovHeight = 0;
-    m_dler                   = 0;
+    m_dler                   = nullptr;
 
     QWidget *mainWidget     = new QWidget(this);
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(mainWidget);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     buttonBox->addButton(i18nc("Export image", "Export"), QDialogButtonBox::AcceptRole);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(slotExport()));
 
     QVBoxLayout *rows = new QVBoxLayout;
     mainWidget->setLayout(rows);
 
     m_skyChartDisplay = new QLabel;
     m_skyChartDisplay->setBackgroundRole(QPalette::Base);
     m_skyChartDisplay->setScaledContents(false);
     m_skyChartDisplay->setMinimumWidth(400);
 
     m_skyImageDisplay = new QLabel;
     m_skyImageDisplay->setBackgroundRole(QPalette::Base);
     m_skyImageDisplay->setScaledContents(false);
     m_skyImageDisplay->setMinimumWidth(400);
     m_skyImageDisplay->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Expanding);
 
     QHBoxLayout *imageLayout = new QHBoxLayout;
     rows->addLayout(imageLayout);
     imageLayout->addWidget(m_skyChartDisplay);
     imageLayout->addWidget(m_skyImageDisplay);
 
     m_invertView   = new QCheckBox(i18n("Invert view"), this);
     m_flipView     = new QCheckBox(i18n("Flip view"), this);
     m_overlay      = new QCheckBox(i18n("Overlay"), this);
     m_invertColors = new QCheckBox(i18n("Invert colors"), this);
     m_getDSS       = new QPushButton(i18n("Fetch DSS image"), this);
 
     m_getDSS->setVisible(false);
 
     QHBoxLayout *optionsLayout = new QHBoxLayout;
     optionsLayout->addWidget(m_invertView);
     optionsLayout->addWidget(m_flipView);
     optionsLayout->addStretch();
     optionsLayout->addWidget(m_overlay);
     optionsLayout->addWidget(m_invertColors);
     optionsLayout->addWidget(m_getDSS);
 
     rows->addLayout(optionsLayout);
 
     m_rotationSlider = new QSlider(Qt::Horizontal, this);
     m_rotationSlider->setMaximum(180);
     m_rotationSlider->setMinimum(-180);
     m_rotationSlider->setTickInterval(30);
     m_rotationSlider->setPageStep(30);
 
     QLabel *sliderLabel = new QLabel(i18n("Rotation: "), this);
 
     m_presetCombo = new QComboBox(this);
     m_presetCombo->addItem(i18n("None"));
     m_presetCombo->addItem(i18n("Vanilla"));
     m_presetCombo->addItem(i18n("Flipped"));
     m_presetCombo->addItem(i18n("Refractor"));
     m_presetCombo->addItem(i18n("Dobsonian"));
 
     QLabel *presetLabel = new QLabel(i18n("Preset: "), this);
 
     QHBoxLayout *rotationLayout = new QHBoxLayout;
     rotationLayout->addWidget(sliderLabel);
     rotationLayout->addWidget(m_rotationSlider);
     rotationLayout->addWidget(presetLabel);
     rotationLayout->addWidget(m_presetCombo);
 
     rows->addLayout(rotationLayout);
 
     connect(m_invertView, SIGNAL(stateChanged(int)), this, SLOT(render()));
     connect(m_flipView, SIGNAL(stateChanged(int)), this, SLOT(render()));
     connect(m_invertColors, SIGNAL(stateChanged(int)), this, SLOT(render()));
     connect(m_overlay, SIGNAL(stateChanged(int)), this, SLOT(render()));
     connect(m_rotationSlider, SIGNAL(valueChanged(int)), this, SLOT(render()));
     connect(m_presetCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(slotEnforcePreset(int)));
     connect(m_presetCombo, SIGNAL(activated(int)), this, SLOT(slotEnforcePreset(int)));
     connect(m_getDSS, SIGNAL(clicked()), this, SLOT(slotDownloadDss()));
 }
 
 void EyepieceField::slotEnforcePreset(int index)
 {
     if (index == -1)
         index = m_presetCombo->currentIndex();
     if (index == -1)
         index = 0;
 
     if (index == 0)
         return; // Preset "None" makes no changes
 
     double altAzRot = (m_usedAltAz ? 0.0 : findNorthAngle(m_sp, KStarsData::Instance()->geo()->lat()).Degrees());
     if (altAzRot > 180.0)
         altAzRot -= 360.0;
     double dobRot = altAzRot - m_sp->alt().Degrees(); // set rotation to altitude CW
     if (dobRot > 180.0)
         dobRot -= 360.0;
     if (dobRot < -180.0)
         dobRot += 360.0;
     switch (index)
     {
         case 1:
             // Preset vanilla
             m_rotationSlider->setValue(0.0); // reset rotation
             m_invertView->setChecked(false); // reset inversion
             m_flipView->setChecked(false);   // reset flip
             break;
         case 2:
             // Preset flipped
             m_rotationSlider->setValue(0.0); // reset rotation
             m_invertView->setChecked(false); // reset inversion
             m_flipView->setChecked(true);    // set flip
             break;
         case 3:
             // Preset refractor
             m_rotationSlider->setValue(altAzRot);
             m_invertView->setChecked(true);
             m_flipView->setChecked(false);
             break;
         case 4:
             // Preset Dobsonian
             m_rotationSlider->setValue(dobRot); // set rotation for dob
             m_invertView->setChecked(true);     // set inversion
             m_flipView->setChecked(false);
             break;
         default:
             break;
     }
 }
 
 void EyepieceField::showEyepieceField(SkyPoint *sp, FOV const *const fov, const QString &imagePath)
 {
     double fovWidth, fovHeight;
 
     Q_ASSERT(sp);
 
     // See if we were supplied a sky image; if so, load its metadata
     // Set up the new sky map FOV and pointing. full map FOV = 4 times the given FOV.
     if (fov)
     {
         fovWidth  = fov->sizeX();
         fovHeight = fov->sizeY();
     }
     else if (QFile::exists(imagePath))
     {
         fovWidth = fovHeight = -1.0; // figure out from the image.
     }
     else
     {
         //Q_ASSERT( false );
         // Don't crash the program
-        KMessageBox::error(0, i18n(("No image found. Please specify the exact FOV.")));
+        KMessageBox::error(nullptr, i18n(("No image found. Please specify the exact FOV.")));
         return;
     }
 
     showEyepieceField(sp, fovWidth, fovHeight, imagePath);
     m_currentFOV = fov;
 }
 
 void EyepieceField::showEyepieceField(SkyPoint *sp, const double fovWidth, double fovHeight, const QString &imagePath)
 {
     if (m_skyChart.get() == nullptr)
         m_skyChart.reset(new QImage());
 
     if (QFile::exists(imagePath))
     {
         qCDebug(KSTARS) << "Image path " << imagePath << " exists";
         if (m_skyImage.get() == nullptr)
         {
             qCDebug(KSTARS) << "Sky image did not exist, creating.";
             m_skyImage.reset(new QImage());
         }
     }
     else
     {
         m_skyImage.reset();
     }
 
     m_usedAltAz = Options::useAltAz();
     generateEyepieceView(sp, m_skyChart.get(), m_skyImage.get(), fovWidth, fovHeight, imagePath);
 
     // Keep a copy for local purposes (computation of field rotation etc.)
     if (m_sp != sp)
     {
         if (m_sp)
             delete m_sp;
         m_sp = new SkyPoint(*sp);
     }
 
     // Update our date/time
     delete m_dt;
     m_dt = new KStarsDateTime(KStarsData::Instance()->ut());
 
     // Enforce preset as per selection, since we have loaded a new eyepiece view
     slotEnforcePreset(-1);
     // Render the display
     render();
     m_fovWidth   = fovWidth;
     m_fovHeight  = fovHeight;
-    m_currentFOV = 0;
+    m_currentFOV = nullptr;
 }
 
 void EyepieceField::generateEyepieceView(SkyPoint *sp, QImage *skyChart, QImage *skyImage, const FOV *fov,
                                          const QString &imagePath)
 {
     if (fov)
     {
         generateEyepieceView(sp, skyChart, skyImage, fov->sizeX(), fov->sizeY(), imagePath);
     }
     else
     {
         generateEyepieceView(sp, skyChart, skyImage, -1.0, -1.0, imagePath);
     }
 }
 
 void EyepieceField::generateEyepieceView(SkyPoint *sp, QImage *skyChart, QImage *skyImage, double fovWidth,
                                          double fovHeight, const QString &imagePath)
 {
     SkyMap *map = SkyMap::Instance();
     KStars *ks  = KStars::Instance();
 
     Q_ASSERT(sp);
     Q_ASSERT(map);
     Q_ASSERT(ks);
     Q_ASSERT(skyChart);
 
     if (!skyChart)
         return;
 
     if (!map) // Requires initialization of Sky map.
         return;
 
     if (fovWidth <= 0)
     {
         if (!QFile::exists(imagePath))
             return;
         // Otherwise, we will assume that the user wants the FOV of the image and we'll try to guess it from there
     }
     if (fovHeight <= 0)
         fovHeight = fovWidth;
 
     // Get DSS image width / height
     double dssWidth = 0, dssHeight = 0;
 
     if (QFile::exists(imagePath))
     {
         KSDssImage dssImage(imagePath);
         dssWidth  = dssImage.getMetadata().width;
         dssHeight = dssImage.getMetadata().height;
         if (!dssImage.getMetadata().isValid() || dssWidth == 0 || dssHeight == 0)
         {
             // Metadata unavailable, guess based on most common DSS arcsec/pixel
             //const double dssArcSecPerPixel = 1.01;
             dssWidth  = dssImage.getImage().width() * 1.01 / 60.0;
             dssHeight = dssImage.getImage().height() * 1.01 / 60.0;
         }
         qCDebug(KSTARS) << "DSS width: " << dssWidth << " height: " << dssHeight;
     }
 
     // Set FOV width/height from DSS if necessary
     if (fovWidth <= 0)
     {
         fovWidth  = dssWidth;
         fovHeight = dssHeight;
     }
 
     // Grab the sky chart
     // Save the current state of the sky map
     SkyPoint *oldFocus   = map->focus();
     double oldZoomFactor = Options::zoomFactor();
 
     // Set the right zoom
     ks->setApproxFOV(((fovWidth > fovHeight) ? fovWidth : fovHeight) / 15.0);
 
     //    map->setFocus( sp ); // FIXME: Why does setFocus() need a non-const SkyPoint pointer?
     KStarsData *const data = KStarsData::Instance();
     sp->updateCoords(data->updateNum(), true, data->geo()->lat(), data->lst(), false);
     map->setClickedPoint(sp);
     map->slotCenter();
     qApp->processEvents();
 
     // Repeat -- dirty workaround for some problem in KStars
     map->setClickedPoint(sp);
     map->slotCenter();
     qApp->processEvents();
 
     // determine screen arcminutes per pixel value
     const double arcMinToScreen = dms::PI * Options::zoomFactor() / 10800.0;
 
     // Vector export
     QTemporaryFile myTempSvgFile;
     myTempSvgFile.open();
 
     // export as SVG
     QSvgGenerator svgGenerator;
     svgGenerator.setFileName(myTempSvgFile.fileName());
     // svgGenerator.setTitle(i18n(""));
     // svgGenerator.setDescription(i18n(""));
     svgGenerator.setSize(QSize(map->width(), map->height()));
     svgGenerator.setResolution(qMax(map->logicalDpiX(), map->logicalDpiY()));
     svgGenerator.setViewBox(QRect(map->width() / 2.0 - arcMinToScreen * fovWidth / 2.0,
                                   map->height() / 2.0 - arcMinToScreen * fovHeight / 2.0, arcMinToScreen * fovWidth,
                                   arcMinToScreen * fovHeight));
 
     SkyQPainter painter(KStars::Instance(), &svgGenerator);
     painter.begin();
 
     map->exportSkyImage(&painter);
 
     painter.end();
 
     // Render SVG file on raster QImage canvas
     QSvgRenderer svgRenderer(myTempSvgFile.fileName());
     QImage *mySkyChart = new QImage(arcMinToScreen * fovWidth * 2.0, arcMinToScreen * fovHeight * 2.0,
                                     QImage::Format_ARGB32); // 2 times bigger in both dimensions.
     QPainter p2(mySkyChart);
     svgRenderer.render(&p2);
     p2.end();
     *skyChart = *mySkyChart;
     delete mySkyChart;
 
     myTempSvgFile.close();
 
     // Reset the sky-map
     map->setZoomFactor(oldZoomFactor);
     map->setClickedPoint(oldFocus);
     map->slotCenter();
     qApp->processEvents();
 
     // Repeat -- dirty workaround for some problem in KStars
     map->setZoomFactor(oldZoomFactor);
     map->setClickedPoint(oldFocus);
     map->slotCenter();
     qApp->processEvents();
     map->forceUpdate();
 
     // Prepare the sky image
     if (QFile::exists(imagePath) && skyImage)
     {
         QImage *mySkyImage = new QImage(int(arcMinToScreen * fovWidth * 2.0), int(arcMinToScreen * fovHeight * 2.0),
                                         QImage::Format_ARGB32);
 
         mySkyImage->fill(Qt::transparent);
 
         QPainter p(mySkyImage);
         QImage rawImg(imagePath);
 
         if (rawImg.isNull())
         {
             qWarning() << "Image constructed from " << imagePath
                        << "is a null image! Are you sure you supplied an image file? Continuing nevertheless...";
         }
 
         QImage img     = rawImg.scaled(arcMinToScreen * dssWidth * 2.0, arcMinToScreen * dssHeight * 2.0,
                                    Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
         const auto ksd = KStarsData::Instance();
         sp->updateCoordsNow(ksd->updateNum());
 
         if (Options::useAltAz())
         {
             // Need to rotate the image so that up is towards zenith rather than north.
             sp->EquatorialToHorizontal(ksd->lst(), ksd->geo()->lat());
             dms northBearing = findNorthAngle(sp, ksd->geo()->lat());
             qCDebug(KSTARS) << "North angle = " << northBearing.toDMSString();
 
             QTransform transform;
 
             transform.rotate(northBearing.Degrees());
             img = img.transformed(transform, Qt::SmoothTransformation);
         }
         p.drawImage(
             QPointF(mySkyImage->width() / 2.0 - img.width() / 2.0, mySkyImage->height() / 2.0 - img.height() / 2.0),
             img);
         p.end();
 
         *skyImage = *mySkyImage;
         delete mySkyImage;
     }
 }
 
 void EyepieceField::renderEyepieceView(const QImage *skyChart, QPixmap *renderChart, const double rotation,
                                        const double scale, const bool flip, const bool invert, const QImage *skyImage,
                                        QPixmap *renderImage, const bool overlay, const bool invertColors)
 {
     QTransform transform;
     bool deleteRenderImage = false;
     transform.rotate(rotation);
     if (flip)
         transform.scale(-1, 1);
     if (invert)
         transform.scale(-1, -1);
     transform.scale(scale, scale);
 
     Q_ASSERT(skyChart && renderChart);
     if (!skyChart || !renderChart)
         return;
 
     *renderChart = QPixmap::fromImage(skyChart->transformed(transform, Qt::SmoothTransformation));
 
     if (skyImage)
     {
         Q_ASSERT(overlay || renderImage); // in debug mode, check for calls that supply skyImage but not renderImage
     }
     if (overlay && !renderImage)
     {
         renderImage       = new QPixmap(); // temporary, used for rendering skymap before overlay is done.
         deleteRenderImage = true;          // we created it, so we must delete it.
     }
 
     if (skyImage && renderImage)
     {
         if (skyImage->isNull())
             qWarning() << "Sky image supplied to renderEyepieceView() for rendering is a Null image!";
         QImage i;
         i = skyImage->transformed(transform, Qt::SmoothTransformation);
         if (invertColors)
             i.invertPixels();
         *renderImage = QPixmap::fromImage(i);
     }
     if (overlay && skyImage)
     {
         QColor skyColor = KStarsData::Instance()->colorScheme()->colorNamed("SkyColor");
         QBitmap mask    = QBitmap::fromImage(
             skyChart->createMaskFromColor(skyColor.rgb()).transformed(transform, Qt::SmoothTransformation));
         renderChart->setMask(mask);
         QPainter p(renderImage);
         p.drawImage(QPointF(renderImage->width() / 2.0 - renderChart->width() / 2.0,
                             renderImage->height() / 2.0 - renderChart->height() / 2.0),
                     renderChart->toImage());
         QPixmap temp(renderImage->width(), renderImage->height());
         temp.fill(skyColor);
         QPainter p2(&temp);
         p2.drawImage(QPointF(0, 0), renderImage->toImage());
         p2.end();
         p.end();
         *renderChart = *renderImage = temp;
     }
     if (deleteRenderImage)
         delete renderImage;
 }
 
 void EyepieceField::renderEyepieceView(SkyPoint *sp, QPixmap *renderChart, double fovWidth, double fovHeight,
                                        const double rotation, const double scale, const bool flip, const bool invert,
                                        const QString &imagePath, QPixmap *renderImage, const bool overlay,
                                        const bool invertColors)
 {
-    QImage *skyChart, *skyImage = 0;
+    QImage *skyChart, *skyImage = nullptr;
     skyChart = new QImage();
     if (QFile::exists(imagePath) && (renderImage || overlay))
         skyImage = new QImage();
     generateEyepieceView(sp, skyChart, skyImage, fovWidth, fovHeight, imagePath);
     renderEyepieceView(skyChart, renderChart, rotation, scale, flip, invert, skyImage, renderImage, overlay,
                        invertColors);
     delete skyChart;
     delete skyImage;
 }
 
 void EyepieceField::render()
 {
     double rotation   = m_rotationSlider->value();
     bool flip         = m_flipView->isChecked();
     bool invert       = m_invertView->isChecked();
     bool invertColors = m_invertColors->isChecked();
     bool overlay      = m_overlay->isChecked() && m_skyImage.get();
 
     Q_ASSERT(m_skyChart.get());
 
     renderEyepieceView(m_skyChart.get(), &m_renderChart, rotation, 1.0, flip, invert, m_skyImage.get(), &m_renderImage,
                        overlay, invertColors);
 
     m_skyChartDisplay->setVisible(!overlay);
     if (m_skyImage.get() != nullptr)
     {
         m_skyImageDisplay->setVisible(true);
         m_overlay->setVisible(true);
         m_invertColors->setVisible(true);
         m_getDSS->setVisible(false);
     }
     else
     {
         m_skyImageDisplay->setVisible(false);
         m_overlay->setVisible(false);
         m_invertColors->setVisible(false);
         m_getDSS->setVisible(true);
     }
 
     if (!overlay)
         m_skyChartDisplay->setPixmap(m_renderChart.scaled(m_skyChartDisplay->width(), m_skyChartDisplay->height(),
                                                           Qt::KeepAspectRatio, Qt::SmoothTransformation));
     if (m_skyImage.get() != nullptr)
         m_skyImageDisplay->setPixmap(m_renderImage.scaled(m_skyImageDisplay->width(), m_skyImageDisplay->height(),
                                                           Qt::KeepAspectRatio, Qt::SmoothTransformation));
 
     update();
     show();
 }
 
 void EyepieceField::slotDownloadDss()
 {
     double fovWidth = 0, fovHeight = 0;
-    if (m_fovWidth == 0 && m_currentFOV == 0)
+    if (m_fovWidth == 0 && m_currentFOV == nullptr)
     {
         fovWidth = fovHeight = 15.0;
     }
     else if (m_currentFOV)
     {
         fovWidth  = m_currentFOV->sizeX();
         fovHeight = m_currentFOV->sizeY();
     }
     if (!m_dler)
     {
         m_dler = new KSDssDownloader(this);
         connect(m_dler, SIGNAL(downloadComplete(bool)), SLOT(slotDssDownloaded(bool)));
     }
     KSDssImage::Metadata md;
     m_tempFile.open();
     QUrl srcUrl = QUrl(KSDssDownloader::getDSSURL(m_sp, fovWidth, fovHeight, "all", &md));
     m_dler->startSingleDownload(srcUrl, m_tempFile.fileName(), md);
     m_tempFile.close();
 }
 
 void EyepieceField::slotDssDownloaded(bool success)
 {
     if (!success)
     {
-        KMessageBox::sorry(0, i18n("Failed to download DSS/SDSS image!"));
+        KMessageBox::sorry(nullptr, i18n("Failed to download DSS/SDSS image!"));
         return;
     }
     else
         showEyepieceField(m_sp, m_fovWidth, m_fovHeight, m_tempFile.fileName());
 }
 
 void EyepieceField::slotExport()
 {
     bool overlay = m_overlay->isChecked() && m_skyImage.get();
     new ExportEyepieceView(m_sp, *m_dt, ((m_skyImage.get() && !overlay) ? &m_renderImage : nullptr),
                            &m_renderChart, this);
 }
 
 dms EyepieceField::findNorthAngle(const SkyPoint *sp, const dms *lat)
 {
     Q_ASSERT(sp && lat);
 
     // NOTE: northAngle1 is the correction due to lunisolar precession
     // (needs testing and checking). northAngle2 is the correction due
     // to going from equatorial to horizontal coordinates.
 
     // FIXME: The following code is a guess at how to handle
     // precession. While it might work in many cases, it might fail in
     // some. Careful testing will be needed to ensure that all
     // conditions are met, esp. with getting the signs right when
     // using arccosine! Nutation and planetary precession corrections
     // have not been included. -- asimha
     // TODO: Look at the Meeus book and see if it has some formulas -- asimha
     const double equinoxPrecessionPerYear =
         (50.35 /
          3600.0); // Equinox precession in ecliptic longitude per year in degrees (ref: http://star-www.st-and.ac.uk/~fv/webnotes/chapt16.htm)
     dms netEquinoxPrecession(((sp->getLastPrecessJD() - J2000) / 365.25) * equinoxPrecessionPerYear);
     double cosNorthAngle1 =
         (netEquinoxPrecession.cos() - sp->dec0().sin() * sp->dec().sin()) / (sp->dec0().cos() * sp->dec().cos());
     double northAngle1 = acos(cosNorthAngle1);
     if (sp->getLastPrecessJD() < J2000)
         northAngle1 = -northAngle1;
     if (sp->dec0().Degrees() < 0)
         northAngle1 = -northAngle1;
     // We trust that EquatorialToHorizontal has been called on sp, after all, how else can it have an alt/az representation.
     // Use spherical cosine rule (the triangle with vertices at sp, zenith and NCP) to compute the angle between direction of increasing altitude and north
     double cosNorthAngle2 = (lat->sin() - sp->alt().sin() * sp->dec().sin()) / (sp->alt().cos() * sp->dec().cos());
     double northAngle2    = acos(cosNorthAngle2); // arccosine is blind to sign of the angle
     if (sp->az().reduce().Degrees() < 180.0)      // if on the eastern hemisphere, flip sign
         northAngle2 = -northAngle2;
     double northAngle = northAngle1 + northAngle2;
     qCDebug(KSTARS) << "Data: alt = " << sp->alt().toDMSString() << "; az = " << sp->az().toDMSString() << "; ra, dec ("
              << sp->getLastPrecessJD() / 365.25 << ") = " << sp->ra().toHMSString() << "," << sp->dec().toDMSString()
              << "; ra0,dec0 (J2000.0) = " << sp->ra0().toHMSString() << "," << sp->dec0().toDMSString();
     qCDebug(KSTARS) << "PA corrections: precession cosine = " << cosNorthAngle1 << "; angle = " << northAngle1
              << "; horizontal = " << cosNorthAngle2 << "; angle = " << northAngle2;
     return dms(northAngle * 180 / M_PI);
 }
diff --git a/kstars/tools/eyepiecefield.h b/kstars/tools/eyepiecefield.h
index c3355b367..19852fc3c 100644
--- a/kstars/tools/eyepiecefield.h
+++ b/kstars/tools/eyepiecefield.h
@@ -1,182 +1,182 @@
 /***************************************************************************
                  eyepiecefield.h  -  K Desktop Planetarium
                              -------------------
     begin                : Fri 30 May 2014 14:39:37 CDT
     copyright            : (c) 2014 by Akarsh Simha
     email                : akarsh.simha@kdemail.net
 ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "dms.h"
 
 #include <QDialog>
 #include <QPixmap>
 #include <QTemporaryFile>
 
 #include <memory>
 
 class QCheckBox;
 class QComboBox;
 class QImage;
 class QLabel;
 class QPushButton;
 class QSlider;
 class QString;
 
 class FOV;
 class KSDssDownloader;
 class KStarsDateTime;
 class SkyPoint;
 
 /**
  * @class EyepieceField
  * @short Renders the view through the eyepiece of various telescope types
  *
  * @author Akarsh Simha <akarsh.simha@kdemail.net>
  */
 class EyepieceField : public QDialog // FIXME: Rename to EyepieceView
 {
     Q_OBJECT
 
   public:
     /** Constructor */
     explicit EyepieceField(QWidget *parent = nullptr);
 
     /**
      * @short Show the eyepiece field dialog
      * @param sp Sky point to draw the eyepiece field around.
      * @param fov Pointer to the FOV object describing the field of view. If no pointer is
      * provided, tries to get from image. If no image is provided, assumes 1 degree.
      * @param imagePath Optional path to DSS or other image. North should be on the top of the image.
      * @note The SkyPoint must have correct Alt/Az coordinates, maybe by calling update()
      * already before calling this method.
      */
-    void showEyepieceField(SkyPoint *sp, FOV const *const fov = 0, const QString &imagePath = QString());
+    void showEyepieceField(SkyPoint *sp, FOV const *const fov = nullptr, const QString &imagePath = QString());
 
     /**
      * @short Show the eyepiece field dialog
      * @param sp Sky point to draw the eyepiece field around.
      * @param fovWidth width of field-of-view in arcminutes
      * @param fovHeight height of field-of-view in arcminutes (if not supplied, is set to fovWidth)
      * @param imagePath Optional path to DSS or other image. North should be on the top of the image.
      * @note The SkyPoint must have correct Alt/Az coordinates, maybe by calling update() already
      * before calling this method.
      */
     void showEyepieceField(SkyPoint *sp, const double fovWidth, double fovHeight = -1.0,
                            const QString &imagePath = QString());
 
     /**
      * @short Generate the eyepiece field view and corresponding image view
      * @param sp Sky point to draw the render the eyepiece field around
      * @param skyChart A non-null pointer to replace with the eyepiece field image
      * @param skyImage An optionally non-null pointer to replace with the re-oriented sky image
      * @param fovWidth width of the field-of-view in arcminutes
      * @param fovHeight height of field-of-view in arcminutes (if not supplied, is set to fovWidth)
      * @param imagePath Optional path to DSS or other image. North
      * should be on the top of the image, and the size should be in
      * the metadata; otherwise 1.01 arcsec/pixel is assumed.
      * @note fovWidth can be zero/negative if imagePath is non-empty. If it is, the image
      * size is used for the FOV.
      * @note fovHeight can be zero/negative. If it is, fovWidth will be used. If fovWidth is also
      * zero, image size is used.
      */
     static void generateEyepieceView(SkyPoint *sp, QImage *skyChart, QImage *skyImage = nullptr, double fovWidth = -1.0,
                                      double fovHeight = -1.0, const QString &imagePath = QString());
 
     /**
      * @short Overloaded method provided for convenience. Obtains fovWidth/fovHeight from
      * FOV if non-null, else uses image
      */
     static void generateEyepieceView(SkyPoint *sp, QImage *skyChart, QImage *skyImage = nullptr,
                                      const FOV *fov = nullptr, const QString &imagePath = QString());
 
     /**
      * @short Orients the eyepiece view as needed, performs overlaying etc.
      * @param skyChart image which contains the sky chart, possibly generated using generateEyepieceView
      * @param skyImage optional image which contains the sky image, possibly generated using generateEyepieceView
      * @param renderChart pixmap onto which the sky chart is to be rendered
      * @param renderImage optional pixmap onto which the sky image is to be rendered
      * @param rotation optional, number of degrees by which to rotate the image(s)
      * @param scale optional, factor by which to scale the image(s)
      * @param flip optional, if true, the image is mirrored horizontally
      * @param invert optional, if true, the image is inverted, i.e. rotated by 180 degrees
      * @param overlay optional, if true, the sky image is overlaid on the sky map
      * @param invertColors optional, if true, the sky image is color-inverted
      */
     static void renderEyepieceView(const QImage *skyChart, QPixmap *renderChart, const double rotation = 0,
                                    const double scale = 1.0, const bool flip = false, const bool invert = false,
                                    const QImage *skyImage = nullptr, QPixmap *renderImage = nullptr,
                                    const bool overlay = false, const bool invertColors = false);
 
     /**
      * @short Convenience method that generates and the renders the eyepiece view
      * @note calls generateEyepieceView() followed by the raw form of renderEyepieceView() to render an eyepiece view
      */
     static void renderEyepieceView(SkyPoint *sp, QPixmap *renderChart, double fovWidth = -1.0, double fovHeight = -1.0,
                                    const double rotation = 0, const double scale = 1.0, const bool flip = false,
                                    const bool invert = false, const QString &imagePath = QString(),
                                    QPixmap *renderImage = nullptr, const bool overlay = false,
                                    const bool invertColors = false);
 
     /**
      * @short Finds the angle between "up" (i.e. direction of increasing altitude) and "north" (i.e. direction of increasing declination) at a given point in the sky
      * @fixme Procedure does not account for precession and nutation at the moment
      * @note SkyPoint must already have Equatorial and Horizontal coordinate synced
      */
     static dms findNorthAngle(const SkyPoint *sp, const dms *lat);
 
   public slots:
 
     /**
      * @short Re-renders the view
      * Takes care of things like inverting colors, inverting orientation, flipping, rotation
      * @note Calls the static method renderEyepieceView to set things up
      */
     void render();
 
     /** Enforces a preset setting */
     void slotEnforcePreset(int index = -1);
 
     /** Save image */
     void slotExport();
 
   private slots:
     /** Downloads a DSS image */
     void slotDownloadDss();
 
     /** Loads a downloaded DSS image */
     void slotDssDownloaded(bool success);
 
   private:
     QLabel *m_skyChartDisplay { nullptr };
     QLabel *m_skyImageDisplay { nullptr };
     std::unique_ptr<QImage> m_skyChart;
     std::unique_ptr<QImage> m_skyImage;
     QSlider *m_rotationSlider { nullptr };
     QCheckBox *m_invertColors { nullptr };
     QCheckBox *m_overlay { nullptr };
     QCheckBox *m_invertView { nullptr };
     QCheckBox *m_flipView { nullptr };
     QComboBox *m_presetCombo { nullptr };
     QPushButton *m_getDSS { nullptr };
     const FOV *m_currentFOV;
     double m_fovWidth { 0 };
     double m_fovHeight { 0 };
     KSDssDownloader *m_dler { nullptr };
     KStarsDateTime *m_dt { nullptr };
     SkyPoint *m_sp { nullptr };
     double m_lat { 0 };
     QTemporaryFile m_tempFile;
     QPixmap m_renderImage, m_renderChart;
     bool m_usedAltAz { false };
 };
diff --git a/kstars/tools/flagmanager.cpp b/kstars/tools/flagmanager.cpp
index a889fb3fc..8316996fd 100644
--- a/kstars/tools/flagmanager.cpp
+++ b/kstars/tools/flagmanager.cpp
@@ -1,369 +1,369 @@
 /***************************************************************************
                           flagmanager.cpp  -  Flags manager
                              -------------------
     begin                : Mon Feb 01 2009
     copyright            : (C) 2009 by Jerome SONRIER
     email                : jsid@emor3j.fr.eu.org
  ***************************************************************************/
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "flagmanager.h"
 
 #include "config-kstars.h"
 
 #include "kspaths.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #include "skymap.h"
 #include "skycomponents/flagcomponent.h"
 #include "skycomponents/skymapcomposite.h"
 
 #ifdef HAVE_INDI
 #include <basedevice.h>
 #include "indi/indilistener.h"
 #include "indi/indistd.h"
 #include "indi/driverinfo.h"
 #endif
 
 #include <KMessageBox>
 
 #include <QStandardItemModel>
 #include <QSortFilterProxyModel>
 
 FlagManagerUI::FlagManagerUI(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 FlagManager::FlagManager(QWidget *ks) : QDialog(ks)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     QList<QStandardItem *> itemList;
     QList<QImage> imageList;
     QStringList flagNames;
     int i;
 
     ui = new FlagManagerUI(this);
 
     setWindowTitle(i18n("Flag manager"));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(ui);
     setLayout(mainLayout);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     m_Ks = KStars::Instance();
 
     ui->hintLabel->setText(i18n("To add custom icons, just add images in %1. File names must begin with flag. "
                                 "For example, the file <i>flagSmall_red_cross.gif</i> will be shown as <i>Small red "
                                 "cross</i> in the combo box.",
                                 KSPaths::writableLocation(QStandardPaths::GenericDataLocation)));
     //Set up the Table Views
     m_Model = new QStandardItemModel(0, 5, this);
     m_Model->setHorizontalHeaderLabels(QStringList() << i18nc("Right Ascension", "RA") << i18nc("Declination", "Dec")
                                                      << i18n("Epoch") << i18n("Icon") << i18n("Label"));
     m_SortModel = new QSortFilterProxyModel(this);
     m_SortModel->setSourceModel(m_Model);
     m_SortModel->setDynamicSortFilter(true);
     ui->flagList->setModel(m_SortModel);
     ui->flagList->horizontalHeader()->setStretchLastSection(true);
 
     ui->flagList->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
 
     ui->saveButton->setEnabled(false);
 
     //Fill the list
     imageList = m_Ks->data()->skyComposite()->flags()->imageList();
     flagNames = m_Ks->data()->skyComposite()->flags()->getNames();
 
     FlagComponent *flags = m_Ks->data()->skyComposite()->flags();
     QPixmap pixmap;
 
     for (i = 0; i < m_Ks->data()->skyComposite()->flags()->size(); ++i)
     {
         QStandardItem *labelItem = new QStandardItem(flags->label(i));
         labelItem->setForeground(QBrush(flags->labelColor(i)));
 
         itemList << new QStandardItem(flags->pointList().at(i)->ra0().toHMSString())
                  << new QStandardItem(flags->pointList().at(i)->dec0().toDMSString())
                  << new QStandardItem(flags->epoch(i))
                  << new QStandardItem(QIcon(pixmap.fromImage(flags->image(i))), flags->imageName(i)) << labelItem;
         m_Model->appendRow(itemList);
         itemList.clear();
     }
 
     //Fill the combobox
     for (i = 0; i < imageList.size(); ++i)
     {
         ui->flagCombobox->addItem(QIcon(pixmap.fromImage(flags->imageList(i))), flagNames.at(i), flagNames.at(i));
     }
 
     //Connect buttons
     connect(ui->addButton, SIGNAL(clicked()), this, SLOT(slotAddFlag()));
     connect(ui->delButton, SIGNAL(clicked()), this, SLOT(slotDeleteFlag()));
     connect(ui->CenterButton, SIGNAL(clicked()), this, SLOT(slotCenterFlag()));
     connect(ui->ScopeButton, SIGNAL(clicked()), this, SLOT(slotCenterTelescope()));
     connect(ui->flagList, SIGNAL(clicked(QModelIndex)), this, SLOT(slotSetShownFlag(QModelIndex)));
     connect(ui->flagList, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(slotCenterFlag()));
 
     connect(ui->saveButton, SIGNAL(clicked()), this, SLOT(slotSaveChanges()));
 }
 
 FlagManager::~FlagManager()
 {
 }
 
 void FlagManager::setRaDec(const dms &ra, const dms &dec)
 {
     ui->raBox->show(ra, false);
     ui->decBox->show(dec, true);
 }
 
 void FlagManager::clearFields()
 {
     ui->raBox->clear();
     ui->decBox->clear();
 
     ui->epochBox->setText("2000.0");
     ui->flagLabel->clear();
     ui->flagLabel->setFocus();
 
     //disable "Save changes" button
     ui->saveButton->setEnabled(false);
 
     //unselect item from flagList
     ui->flagList->clearSelection();
 }
 
 void FlagManager::showFlag(int flagIdx)
 {
     if (flagIdx < 0 || flagIdx >= m_Model->rowCount())
     {
         return;
     }
 
     else
     {
         ui->raBox->setText(m_Model->data(m_Model->index(flagIdx, 0)).toString());
         ui->decBox->setText(m_Model->data(m_Model->index(flagIdx, 1)).toString());
         ui->epochBox->setText(m_Model->data(m_Model->index(flagIdx, 2)).toString());
 
         //ui->flagCombobox->setCurrentItem( m_Model->data( m_Model->index( flagIdx, 3) ).toString() );
         ui->flagCombobox->setCurrentText(m_Model->data(m_Model->index(flagIdx, 3)).toString());
         ui->flagLabel->setText(m_Model->data(m_Model->index(flagIdx, 4)).toString());
 
         QColor labelColor = m_Model->item(flagIdx, 4)->foreground().color();
         ui->labelColorcombo->setColor(labelColor);
     }
 
     ui->flagList->selectRow(flagIdx);
     ui->saveButton->setEnabled(true);
 }
 
 bool FlagManager::validatePoint()
 {
     bool raOk(false), decOk(false);
     dms ra(ui->raBox->createDms(false, &raOk)); //false means expressed in hours
     dms dec(ui->decBox->createDms(true, &decOk));
 
     QString message;
 
     //check if ra & dec values were successfully converted
     if (!raOk || !decOk)
     {
         return false;
     }
 
     //make sure values are in valid range
     if (ra.Hours() < 0.0 || ra.Hours() > 24.0)
         message = i18n("The Right Ascension value must be between 0.0 and 24.0.");
     if (dec.Degrees() < -90.0 || dec.Degrees() > 90.0)
         message += '\n' + i18n("The Declination value must be between -90.0 and 90.0.");
     if (!message.isEmpty())
     {
-        KMessageBox::sorry(0, message, i18n("Invalid Coordinate Data"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid Coordinate Data"));
         return false;
     }
 
     //all checks passed
     return true;
 }
 
 void FlagManager::deleteFlagItem(int flagIdx)
 {
     if (flagIdx < m_Model->rowCount())
     {
         m_Model->removeRow(flagIdx);
     }
 }
 
 void FlagManager::slotAddFlag()
 {
     dms ra(ui->raBox->createDms(false)); //false means expressed in hours
     dms dec(ui->decBox->createDms(true));
 
     insertFlag(true);
 
     FlagComponent *flags = m_Ks->data()->skyComposite()->flags();
     //Add flag in FlagComponent
     SkyPoint flagPoint(ra, dec);
     flags->add(flagPoint, ui->epochBox->text(), ui->flagCombobox->currentText(), ui->flagLabel->text(),
                ui->labelColorcombo->color());
 
     ui->flagList->selectRow(m_Model->rowCount() - 1);
     ui->saveButton->setEnabled(true);
 
     flags->saveToFile();
 
     //Redraw map
     m_Ks->map()->forceUpdate(false);
 }
 
 void FlagManager::slotDeleteFlag()
 {
     int flag = ui->flagList->currentIndex().row();
 
     //Remove from FlagComponent
     m_Ks->data()->skyComposite()->flags()->remove(flag);
 
     //Remove from list
     m_Model->removeRow(flag);
 
     //Clear form fields
     clearFields();
 
     //Remove from file
     m_Ks->data()->skyComposite()->flags()->saveToFile();
 
     //Redraw map
     m_Ks->map()->forceUpdate(false);
 }
 
 void FlagManager::slotCenterFlag()
 {
     if (ui->flagList->currentIndex().isValid())
     {
-        m_Ks->map()->setClickedObject(0);
+        m_Ks->map()->setClickedObject(nullptr);
         m_Ks->map()->setClickedPoint(
             m_Ks->data()->skyComposite()->flags()->pointList().at(ui->flagList->currentIndex().row()).get());
         m_Ks->map()->slotCenter();
     }
 }
 
 void FlagManager::slotCenterTelescope()
 {
 #ifdef HAVE_INDI
 
     if (INDIListener::Instance()->size() == 0)
     {
         KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
         return;
     }
 
     foreach (ISD::GDInterface *gd, INDIListener::Instance()->getDevices())
     {
         INDI::BaseDevice *bd = gd->getBaseDevice();
 
         if (gd->getType() != KSTARS_TELESCOPE)
             continue;
 
         if (bd == nullptr)
             continue;
 
         if (bd->isConnected() == false)
         {
             KMessageBox::error(0,
                                i18n("Telescope %1 is offline. Please connect and retry again.", gd->getDeviceName()));
             return;
         }
 
         ISD::GDSetCommand SlewCMD(INDI_SWITCH, "ON_COORD_SET", "TRACK", ISS_ON, this);
 
         gd->setProperty(&SlewCMD);
         gd->runCommand(INDI_SEND_COORDS,
                        m_Ks->data()->skyComposite()->flags()->pointList().at(ui->flagList->currentIndex().row()).get());
 
         return;
     }
 
     KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
 
 #endif
 }
 
 void FlagManager::slotSaveChanges()
 {
     int row = ui->flagList->currentIndex().row();
 
     validatePoint();
 
     insertFlag(false, row);
 
     m_Ks->map()->forceUpdate();
 
     dms ra(ui->raBox->createDms(false)); //false means expressed in hours
     dms dec(ui->decBox->createDms(true));
 
     SkyPoint flagPoint(ra, dec);
 
     //Update FlagComponent
     m_Ks->data()->skyComposite()->flags()->updateFlag(row, flagPoint, ui->epochBox->text(),
                                                       ui->flagCombobox->currentText(), ui->flagLabel->text(),
                                                       ui->labelColorcombo->color());
 
     //Save changes to file
     m_Ks->data()->skyComposite()->flags()->saveToFile();
 }
 
 void FlagManager::slotSetShownFlag(QModelIndex idx)
 {
     showFlag(idx.row());
 }
 
 void FlagManager::insertFlag(bool isNew, int row)
 {
     dms ra(ui->raBox->createDms(false)); //false means expressed in hours
     dms dec(ui->decBox->createDms(true));
     SkyPoint flagPoint(ra, dec);
 
     // Add flag in the list
     QList<QStandardItem *> itemList;
 
     QStandardItem *labelItem = new QStandardItem(ui->flagLabel->text());
     labelItem->setForeground(QBrush(ui->labelColorcombo->color()));
 
     FlagComponent *flags = m_Ks->data()->skyComposite()->flags();
 
     QPixmap pixmap;
     itemList << new QStandardItem(flagPoint.ra0().toHMSString()) << new QStandardItem(flagPoint.dec0().toDMSString())
              << new QStandardItem(ui->epochBox->text())
              << new QStandardItem(QIcon(pixmap.fromImage(flags->imageList(ui->flagCombobox->currentIndex()))),
                                   ui->flagCombobox->currentText())
              << labelItem;
 
     if (isNew)
     {
         m_Model->appendRow(itemList);
     }
 
     else
     {
         for (int i = 0; i < m_Model->columnCount(); i++)
         {
             m_Model->setItem(row, i, itemList.at(i));
         }
     }
 }
diff --git a/kstars/tools/modcalcangdist.cpp b/kstars/tools/modcalcangdist.cpp
index fbcba6146..b7d978aeb 100644
--- a/kstars/tools/modcalcangdist.cpp
+++ b/kstars/tools/modcalcangdist.cpp
@@ -1,268 +1,268 @@
 /***************************************************************************
                           modcalcapcoord.cpp  -  description
                              -------------------
     begin                : Sun May 30 2004
     copyright            : (C) 2004 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcangdist.h"
 
 #include <QTextStream>
 #include <QPointer>
 
 #include <KLocalizedString>
 #include <KMessageBox>
 
 #include "dms.h"
 #include "widgets/dmsbox.h"
 #include "skyobjects/skypoint.h"
 #include "skyobjects/skyobject.h"
 #include "dialogs/finddialog.h"
 #include "kstars.h"
 
 modCalcAngDist::modCalcAngDist(QWidget *parentSplit) : QFrame(parentSplit)
 {
     setupUi(this);
     FirstRA->setDegType(false);
     SecondRA->setDegType(false);
 
     connect(FirstRA, SIGNAL(editingFinished()), this, SLOT(slotValidatePositions()));
     connect(FirstDec, SIGNAL(editingFinished()), this, SLOT(slotValidatePositions()));
     connect(SecondRA, SIGNAL(editingFinished()), this, SLOT(slotValidatePositions()));
     connect(SecondDec, SIGNAL(editingFinished()), this, SLOT(slotValidatePositions()));
     connect(FirstRA, SIGNAL(textEdited(QString)), this, SLOT(slotResetTitle()));
     connect(FirstDec, SIGNAL(textEdited(QString)), this, SLOT(slotResetTitle()));
     connect(SecondRA, SIGNAL(textEdited(QString)), this, SLOT(slotResetTitle()));
     connect(SecondDec, SIGNAL(textEdited(QString)), this, SLOT(slotResetTitle()));
     connect(FirstObjectButton, SIGNAL(clicked()), this, SLOT(slotObjectButton()));
     connect(SecondObjectButton, SIGNAL(clicked()), this, SLOT(slotObjectButton()));
     connect(runButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
 
     show();
     slotValidatePositions();
 }
 
 modCalcAngDist::~modCalcAngDist()
 {
 }
 
 SkyPoint modCalcAngDist::getCoords(dmsBox *rBox, dmsBox *dBox, bool *ok)
 {
     dms raCoord, decCoord;
 
     bool ok2 = false;
     raCoord  = rBox->createDms(false, &ok2);
     if (ok2)
         decCoord = dBox->createDms(true, &ok2);
 
     if (ok2)
     {
         if (ok)
             *ok = ok2;
         return SkyPoint(raCoord, decCoord);
     }
     else
     {
         if (ok)
             *ok = ok2;
         return SkyPoint();
     }
 }
 
 void modCalcAngDist::slotValidatePositions()
 {
     SkyPoint sp0, sp1;
     bool ok;
     sp0 = getCoords(FirstRA, FirstDec, &ok);
 
     if (ok)
         sp1 = getCoords(SecondRA, SecondDec, &ok);
 
     if (ok)
     {
         double PA = 0;
         AngDist->setText(sp0.angularDistanceTo(&sp1, &PA).toDMSString());
         PositionAngle->setText(QString::number(PA, 'f', 3));
     }
     else
     {
         AngDist->setText(" .... ");
         PositionAngle->setText(" .... ");
     }
 }
 
 void modCalcAngDist::slotObjectButton()
 {
     QPointer<FindDialog> fd = new FindDialog(this);
     if (fd->exec() == QDialog::Accepted)
     {
         SkyObject *o = fd->targetObject();
         if (sender()->objectName() == QString("FirstObjectButton"))
         {
             FirstRA->showInHours(o->ra());
             FirstDec->showInDegrees(o->dec());
             FirstPositionBox->setTitle(i18n("First position: %1", o->name()));
         }
         else
         {
             SecondRA->showInHours(o->ra());
             SecondDec->showInDegrees(o->dec());
             SecondPositionBox->setTitle(i18n("Second position: %1", o->name()));
         }
 
         slotValidatePositions();
     }
     delete fd;
 }
 
 void modCalcAngDist::slotResetTitle()
 {
     QString name = sender()->objectName();
     if (name.contains("First"))
         FirstPositionBox->setTitle(i18n("First position"));
     else
         SecondPositionBox->setTitle(i18n("Second position"));
 }
 
 void modCalcAngDist::slotRunBatch()
 {
     QString inputFileName = InputLineEditBatch->url().toLocalFile();
 
     // We open the input file and read its content
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             inputFileName.clear();
             return;
         }
 
         //		processLines(&f);
         QTextStream istream(&f);
         processLines(istream);
         //		readFile( istream );
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         inputFileName.clear();
         InputLineEditBatch->setText(inputFileName);
         return;
     }
 }
 
 //void modCalcAngDist::processLines( const QFile * fIn ) {
 void modCalcAngDist::processLines(QTextStream &istream)
 {
     // we open the output file
 
     //	QTextStream istream(&fIn);
     QString outputFileName;
     outputFileName = OutputLineEditBatch->text();
     QFile fOut(outputFileName);
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     QString line;
     QChar space = ' ';
     int i       = 0;
     SkyPoint sp0, sp1;
     double PA = 0;
     dms ra0B, dec0B, ra1B, dec1B, dist;
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
         line.trimmed();
 
         //Go through the line, looking for parameters
 
         QStringList fields = line.split(' ');
 
         i = 0;
 
         // Read RA and write in ostream if corresponds
 
         if (ra0CheckBatch->isChecked())
         {
             ra0B = dms::fromString(fields[i], false);
             i++;
         }
         else
             ra0B = ra0BoxBatch->createDms(false);
 
         if (allRadioBatch->isChecked())
             ostream << ra0B.toHMSString() << space;
         else if (ra0CheckBatch->isChecked())
             ostream << ra0B.toHMSString() << space;
 
         // Read DEC and write in ostream if corresponds
 
         if (dec0CheckBatch->isChecked())
         {
             dec0B = dms::fromString(fields[i], true);
             i++;
         }
         else
             dec0B = dec0BoxBatch->createDms();
 
         if (allRadioBatch->isChecked())
             ostream << dec0B.toDMSString() << space;
         else if (dec0CheckBatch->isChecked())
             ostream << dec0B.toDMSString() << space;
 
         // Read RA and write in ostream if corresponds
 
         if (ra1CheckBatch->isChecked())
         {
             ra1B = dms::fromString(fields[i], false);
             i++;
         }
         else
             ra1B = ra1BoxBatch->createDms(false);
 
         if (allRadioBatch->isChecked())
             ostream << ra1B.toHMSString() << space;
         else if (ra1CheckBatch->isChecked())
             ostream << ra1B.toHMSString() << space;
 
         // Read DEC and write in ostream if corresponds
 
         if (dec1CheckBatch->isChecked())
         {
             dec1B = dms::fromString(fields[i], true);
             i++;
         }
         else
             dec1B = dec1BoxBatch->createDms();
 
         if (allRadioBatch->isChecked())
             ostream << dec1B.toDMSString() << space;
         else if (dec1CheckBatch->isChecked())
             ostream << dec1B.toDMSString() << space;
 
         sp0  = SkyPoint(ra0B, dec0B);
         sp1  = SkyPoint(ra1B, dec1B);
         dist = sp0.angularDistanceTo(&sp1, &PA);
 
         ostream << dist.toDMSString() << QString::number(PA, 'f', 3) << endl;
     }
 
     fOut.close();
 }
diff --git a/kstars/tools/modcalcapcoord.cpp b/kstars/tools/modcalcapcoord.cpp
index 56204c870..166dd0b14 100644
--- a/kstars/tools/modcalcapcoord.cpp
+++ b/kstars/tools/modcalcapcoord.cpp
@@ -1,297 +1,297 @@
 /***************************************************************************
                           modcalcapcoord.cpp  -  description
                              -------------------
     begin                : Wed Apr 10 2002
     copyright            : (C) 2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcapcoord.h"
 
 #include "dms.h"
 #include "kstars.h"
 #include "kstarsdatetime.h"
 #include "dialogs/finddialog.h"
 #include "skyobjects/skypoint.h"
 #include "skyobjects/skyobject.h"
 
 #include <KMessageBox>
 
 #include <QTextStream>
 #include <QFileDialog>
 #include <QPointer>
 
 modCalcApCoord::modCalcApCoord(QWidget *parentSplit) : QFrame(parentSplit)
 {
     setupUi(this);
     showCurrentTime();
     RACat->setDegType(false);
     DecCat->setDegType(true);
 
     connect(ObjectButton, SIGNAL(clicked()), this, SLOT(slotObject()));
     connect(NowButton, SIGNAL(clicked()), this, SLOT(showCurrentTime()));
     connect(RACat, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
     connect(DecCat, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
     connect(UT, SIGNAL(timeChanged(QTime)), this, SLOT(slotCompute()));
     connect(Date, SIGNAL(dateChanged(QDate)), this, SLOT(slotCompute()));
 
     connect(utCheckBatch, SIGNAL(clicked()), this, SLOT(slotUtCheckedBatch()));
     connect(dateCheckBatch, SIGNAL(clicked()), this, SLOT(slotDateCheckedBatch()));
     connect(raCheckBatch, SIGNAL(clicked()), this, SLOT(slotRaCheckedBatch()));
     connect(decCheckBatch, SIGNAL(clicked()), this, SLOT(slotDecCheckedBatch()));
     connect(epochCheckBatch, SIGNAL(clicked()), this, SLOT(slotEpochCheckedBatch()));
     connect(runButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
 
     show();
 }
 
 void modCalcApCoord::showCurrentTime(void)
 {
     KStarsDateTime dt(KStarsDateTime::currentDateTime());
     Date->setDate(dt.date());
     UT->setTime(dt.time());
     EpochTarget->setText(QString::number(dt.epoch(), 'f', 3));
 }
 
 void modCalcApCoord::slotCompute()
 {
     KStarsDateTime dt(Date->date(), UT->time());
     long double jd = dt.djd();
 
     dt.setFromEpoch(EpochCat->value());
     long double jd0 = dt.djd();
 
     SkyPoint sp(RACat->createDms(false), DecCat->createDms());
     sp.apparentCoord(jd0, jd);
 
     RA->setText(sp.ra().toHMSString());
     Dec->setText(sp.dec().toDMSString());
 }
 
 void modCalcApCoord::slotObject()
 {
     QPointer<FindDialog> fd = new FindDialog(this);
     if (fd->exec() == QDialog::Accepted)
     {
         SkyObject *o = fd->targetObject();
         RACat->showInHours(o->ra0());
         DecCat->showInDegrees(o->dec0());
         EpochCat->setValue(2000.0);
 
         slotCompute();
     }
     delete fd;
 }
 
 void modCalcApCoord::slotUtCheckedBatch()
 {
     if (utCheckBatch->isChecked())
         utBoxBatch->setEnabled(false);
     else
     {
         utBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcApCoord::slotDateCheckedBatch()
 {
     if (dateCheckBatch->isChecked())
         dateBoxBatch->setEnabled(false);
     else
     {
         dateBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcApCoord::slotRaCheckedBatch()
 {
     if (raCheckBatch->isChecked())
         raBoxBatch->setEnabled(false);
     else
     {
         raBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcApCoord::slotDecCheckedBatch()
 {
     if (decCheckBatch->isChecked())
         decBoxBatch->setEnabled(false);
     else
     {
         decBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcApCoord::slotEpochCheckedBatch()
 {
     if (epochCheckBatch->isChecked())
         epochBoxBatch->setEnabled(false);
     else
     {
         epochBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcApCoord::slotRunBatch()
 {
     QString inputFileName = InputLineEditBatch->url().toLocalFile();
 
     // We open the input file and read its content
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             inputFileName.clear();
             return;
         }
 
         //		processLines(&f);
         QTextStream istream(&f);
         processLines(istream);
         //		readFile( istream );
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         inputFileName.clear();
         InputLineEditBatch->setText(inputFileName);
         return;
     }
 }
 
 //void modCalcApCoord::processLines( const QFile * fIn ) {
 void modCalcApCoord::processLines(QTextStream &istream)
 {
     // we open the output file
 
     //	QTextStream istream(&fIn);
     QString outputFileName;
     outputFileName = OutputLineEditBatch->text();
     QFile fOut(outputFileName);
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     QString line;
     QChar space = ' ';
     int i       = 0;
     long double jd, jd0;
     SkyPoint sp;
     QTime utB;
     QDate dtB;
     dms raB, decB;
     QString epoch0B;
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
         line.trimmed();
 
         //Go through the line, looking for parameters
 
         QStringList fields = line.split(' ');
 
         i = 0;
 
         // Read Ut and write in ostream if corresponds
 
         if (utCheckBatch->isChecked())
         {
             utB = QTime::fromString(fields[i]);
             i++;
         }
         else
             utB = utBoxBatch->time();
 
         if (allRadioBatch->isChecked())
             ostream << QLocale().toString(utB) << space;
         else if (utCheckBatch->isChecked())
             ostream << QLocale().toString(utB) << space;
 
         // Read date and write in ostream if corresponds
 
         if (dateCheckBatch->isChecked())
         {
             dtB = QDate::fromString(fields[i]);
             i++;
         }
         else
             dtB = dateBoxBatch->date();
 
         if (allRadioBatch->isChecked())
             ostream << QLocale().toString(dtB, QLocale::LongFormat).append(space);
         else if (dateCheckBatch->isChecked())
             ostream << QLocale().toString(dtB, QLocale::LongFormat).append(space);
 
         // Read RA and write in ostream if corresponds
 
         if (raCheckBatch->isChecked())
         {
             raB = dms::fromString(fields[i], false);
             i++;
         }
         else
             raB = raBoxBatch->createDms(false);
 
         if (allRadioBatch->isChecked())
             ostream << raB.toHMSString() << space;
         else if (raCheckBatch->isChecked())
             ostream << raB.toHMSString() << space;
 
         // Read DEC and write in ostream if corresponds
 
         if (decCheckBatch->isChecked())
         {
             decB = dms::fromString(fields[i], true);
             i++;
         }
         else
             decB = decBoxBatch->createDms();
 
         if (allRadioBatch->isChecked())
             ostream << decB.toDMSString() << space;
         else if (decCheckBatch->isChecked())
             ostream << decB.toHMSString() << space;
 
         // Read Epoch and write in ostream if corresponds
 
         if (epochCheckBatch->isChecked())
         {
             epoch0B = fields[i];
             i++;
         }
         else
             epoch0B = epochBoxBatch->text();
 
         if (allRadioBatch->isChecked())
             ostream << epoch0B;
         else if (decCheckBatch->isChecked())
             ostream << epoch0B;
 
         KStarsDateTime dt;
         dt.setFromEpoch(epoch0B);
         jd  = KStarsDateTime(dtB, utB).djd();
         jd0 = dt.djd();
         sp  = SkyPoint(raB, decB);
         sp.apparentCoord(jd0, jd);
 
         ostream << sp.ra().toHMSString() << sp.dec().toDMSString() << endl;
     }
 
     fOut.close();
 }
diff --git a/kstars/tools/modcalcdaylength.cpp b/kstars/tools/modcalcdaylength.cpp
index b99d1f6ca..67a33842e 100644
--- a/kstars/tools/modcalcdaylength.cpp
+++ b/kstars/tools/modcalcdaylength.cpp
@@ -1,336 +1,336 @@
 /***************************************************************************
                           modcalcdaylength.cpp  -  description
                              -------------------
     begin                : wed jun 12 2002
     copyright            : (C) 2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcdaylength.h"
 
 #include "geolocation.h"
 #include "kstarsdata.h"
 #include "dialogs/locationdialog.h"
 #include "skyobjects/ksmoon.h"
 #include "skyobjects/kssun.h"
 #include "skyobjects/skyobject.h"
 
 #include <KLineEdit>
 
 modCalcDayLength::modCalcDayLength(QWidget *parentSplit) : QFrame(parentSplit)
 {
     setupUi(this);
 
     showCurrentDate();
     initGeo();
     slotComputeAlmanac();
 
     connect(Date, SIGNAL(dateChanged(QDate)), this, SLOT(slotComputeAlmanac()));
     connect(Location, SIGNAL(clicked()), this, SLOT(slotLocation()));
 
     connect(LocationBatch, SIGNAL(clicked()), this, SLOT(slotLocationBatch()));
     connect(InputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(OutputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(RunButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
     connect(ViewButtonBatch, SIGNAL(clicked()), this, SLOT(slotViewBatch()));
 
     RunButtonBatch->setEnabled(false);
     ViewButtonBatch->setEnabled(false);
 
     show();
 }
 
 modCalcDayLength::~modCalcDayLength()
 {
 }
 
 void modCalcDayLength::showCurrentDate(void)
 {
     KStarsDateTime dt(KStarsDateTime::currentDateTime());
     Date->setDate(dt.date());
 }
 
 void modCalcDayLength::initGeo(void)
 {
     KStarsData *data = KStarsData::Instance();
     geoPlace         = data->geo();
     geoBatch         = data->geo();
     Location->setText(geoPlace->fullName());
     LocationBatch->setText(geoBatch->fullName());
 }
 
 QTime modCalcDayLength::lengthOfDay(const QTime &setQTime, const QTime &riseQTime)
 {
     QTime dL(0, 0, 0);
     int dds       = riseQTime.secsTo(setQTime);
     QTime dLength = dL.addSecs(dds);
 
     return dLength;
 }
 
 void modCalcDayLength::slotLocation()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
     if (ld->exec() == QDialog::Accepted)
     {
         GeoLocation *newGeo = ld->selectedCity();
         if (newGeo)
         {
             geoPlace = newGeo;
             Location->setText(geoPlace->fullName());
         }
     }
     delete ld;
 
     slotComputeAlmanac();
 }
 
 void modCalcDayLength::slotLocationBatch()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
     if (ld->exec() == QDialog::Accepted)
     {
         GeoLocation *newGeo = ld->selectedCity();
         if (newGeo)
         {
             geoBatch = newGeo;
             LocationBatch->setText(geoBatch->fullName());
         }
     }
     delete ld;
 }
 
 void modCalcDayLength::updateAlmanac(const QDate &d, GeoLocation *geo)
 {
     //Determine values needed for the Almanac
     long double jd0 = KStarsDateTime(d, QTime(8, 0, 0)).djd();
     KSNumbers num(jd0);
 
     //Sun
     KSSun Sun;
     Sun.findPosition(&num);
 
     QTime ssTime = Sun.riseSetTime(KStarsDateTime(jd0), geo, false);
     QTime srTime = Sun.riseSetTime(KStarsDateTime(jd0), geo, true);
     QTime stTime = Sun.transitTime(KStarsDateTime(jd0), geo);
 
     dms ssAz  = Sun.riseSetTimeAz(KStarsDateTime(jd0), geo, false);
     dms srAz  = Sun.riseSetTimeAz(KStarsDateTime(jd0), geo, true);
     dms stAlt = Sun.transitAltitude(KStarsDateTime(jd0), geo);
 
     //In most cases, the Sun will rise and set:
     if (ssTime.isValid())
     {
         ssAzString  = ssAz.toDMSString();
         stAltString = stAlt.toDMSString();
         srAzString  = srAz.toDMSString();
 
         ssTimeString = QLocale().toString(ssTime);
         srTimeString = QLocale().toString(srTime);
         stTimeString = QLocale().toString(stTime);
 
         QTime daylength = lengthOfDay(ssTime, srTime);
         //daylengthString = QLocale().toString(daylength);
         daylengthString = QLocale().toString(daylength, "hh:mm:ss");
 
         //...but not always!
     }
     else if (stAlt.Degrees() > 0.)
     {
         ssAzString  = i18n("Circumpolar");
         stAltString = stAlt.toDMSString();
         srAzString  = i18n("Circumpolar");
 
         ssTimeString    = "--:--";
         srTimeString    = "--:--";
         stTimeString    = QLocale().toString(stTime);
         daylengthString = "24:00";
     }
     else if (stAlt.Degrees() < 0.)
     {
         ssAzString  = i18n("Does not rise");
         stAltString = stAlt.toDMSString();
         srAzString  = i18n("Does not set");
 
         ssTimeString    = "--:--";
         srTimeString    = "--:--";
         stTimeString    = QLocale().toString(stTime);
         daylengthString = "00:00";
     }
 
     //Moon
     KSMoon Moon;
 
     QTime msTime = Moon.riseSetTime(KStarsDateTime(jd0), geo, false);
     QTime mrTime = Moon.riseSetTime(KStarsDateTime(jd0), geo, true);
     QTime mtTime = Moon.transitTime(KStarsDateTime(jd0), geo);
 
     dms msAz  = Moon.riseSetTimeAz(KStarsDateTime(jd0), geo, false);
     dms mrAz  = Moon.riseSetTimeAz(KStarsDateTime(jd0), geo, true);
     dms mtAlt = Moon.transitAltitude(KStarsDateTime(jd0), geo);
 
     //In most cases, the Moon will rise and set:
     if (msTime.isValid())
     {
         msAzString  = msAz.toDMSString();
         mtAltString = mtAlt.toDMSString();
         mrAzString  = mrAz.toDMSString();
 
         msTimeString = QLocale().toString(msTime);
         mrTimeString = QLocale().toString(mrTime);
         mtTimeString = QLocale().toString(mtTime);
 
         //...but not always!
     }
     else if (mtAlt.Degrees() > 0.)
     {
         msAzString  = i18n("Circumpolar");
         mtAltString = mtAlt.toDMSString();
         mrAzString  = i18n("Circumpolar");
 
         msTimeString = "--:--";
         mrTimeString = "--:--";
         mtTimeString = QLocale().toString(mtTime);
     }
     else if (mtAlt.Degrees() < 0.)
     {
         msAzString  = i18n("Does not rise");
         mtAltString = mtAlt.toDMSString();
         mrAzString  = i18n("Does not rise");
 
         msTimeString = "--:--";
         mrTimeString = "--:--";
         mtTimeString = QLocale().toString(mtTime);
     }
 
     //after calling riseSetTime Phase needs to reset, setting it before causes Phase to set nan
     Moon.findPosition(&num);
-    Moon.findPhase(0);
+    Moon.findPhase(nullptr);
     lunarphaseString = Moon.phaseName() + " (" + QString::number(int(100 * Moon.illum())) + "%)";
 
     //Fix length of Az strings
     if (srAz.Degrees() < 100.0)
         srAzString = ' ' + srAzString;
     if (ssAz.Degrees() < 100.0)
         ssAzString = ' ' + ssAzString;
     if (mrAz.Degrees() < 100.0)
         mrAzString = ' ' + mrAzString;
     if (msAz.Degrees() < 100.0)
         msAzString = ' ' + msAzString;
 }
 
 void modCalcDayLength::slotComputeAlmanac()
 {
     updateAlmanac(Date->date(), geoPlace);
 
     SunSet->setText(ssTimeString);
     SunRise->setText(srTimeString);
     SunTransit->setText(stTimeString);
     SunSetAz->setText(ssAzString);
     SunRiseAz->setText(srAzString);
     SunTransitAlt->setText(stAltString);
     DayLength->setText(daylengthString);
 
     MoonSet->setText(msTimeString);
     MoonRise->setText(mrTimeString);
     MoonTransit->setText(mtTimeString);
     MoonSetAz->setText(msAzString);
     MoonRiseAz->setText(mrAzString);
     MoonTransitAlt->setText(mtAltString);
     LunarPhase->setText(lunarphaseString);
 }
 
 void modCalcDayLength::slotCheckFiles()
 {
     bool flag = !InputFileBatch->lineEdit()->text().isEmpty() && !OutputFileBatch->lineEdit()->text().isEmpty();
     RunButtonBatch->setEnabled(flag);
 }
 
 void modCalcDayLength::slotRunBatch()
 {
     QString inputFileName = InputFileBatch->url().toLocalFile();
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
 
         QTextStream istream(&f);
         processLines(istream);
         ViewButtonBatch->setEnabled(true);
 
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         return;
     }
 }
 
 void modCalcDayLength::processLines(QTextStream &istream)
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     //Write header
     ostream << "# " << i18nc("%1 is a location on earth", "Almanac for %1", geoBatch->fullName())
             << QString("  [%1, %2]").arg(geoBatch->lng()->toDMSString(), geoBatch->lat()->toDMSString()) << endl
             << "# " << i18n("computed by KStars") << endl
             << "#" << endl
             << "# Date      SRise  STran  SSet     SRiseAz      STranAlt      SSetAz     DayLen    MRise  MTran  MSet  "
                "    MRiseAz      MTranAlt      MSetAz     LunarPhase"
             << endl
             << "#" << endl;
 
     QString line;
     QDate d;
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
         line = line.trimmed();
 
         //Parse the line as a date, then compute Almanac values
         d = QDate::fromString(line);
         if (d.isValid())
         {
             updateAlmanac(d, geoBatch);
             ostream << d.toString(Qt::ISODate) << "  " << srTimeString << "  " << stTimeString << "  " << ssTimeString
                     << "  " << srAzString << "  " << stAltString << "  " << ssAzString << "  " << daylengthString
                     << "    " << mrTimeString << "  " << mtTimeString << "  " << msTimeString << "  " << mrAzString
                     << "  " << mtAltString << "  " << msAzString << "  " << lunarphaseString << endl;
         }
     }
 }
 
 void modCalcDayLength::slotViewBatch()
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::ReadOnly);
     QTextStream istream(&fOut);
     QStringList text;
 
     while (!istream.atEnd())
         text.append(istream.readLine());
 
     fOut.close();
 
-    KMessageBox::informationList(0, i18n("Results of Almanac calculation"), text, OutputFileBatch->url().toLocalFile());
+    KMessageBox::informationList(nullptr, i18n("Results of Almanac calculation"), text, OutputFileBatch->url().toLocalFile());
 }
diff --git a/kstars/tools/modcalcgalcoord.cpp b/kstars/tools/modcalcgalcoord.cpp
index b25aae60d..98a69dd9a 100644
--- a/kstars/tools/modcalcgalcoord.cpp
+++ b/kstars/tools/modcalcgalcoord.cpp
@@ -1,350 +1,350 @@
 /***************************************************************************
                           modcalcgal.cpp  -  description
                              -------------------
     begin                : Thu Jan 17 2002
     copyright            : (C) 2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcgalcoord.h"
 
 #include "dialogs/finddialog.h"
 #include "skyobjects/skyobject.h"
 #include "skyobjects/skypoint.h"
 
 #include <KMessageBox>
 
 #include <QTextStream>
 #include <QPointer>
 
 modCalcGalCoord::modCalcGalCoord(QWidget *parentSplit) : QFrame(parentSplit)
 {
     setupUi(this);
     RA->setDegType(false);
 
     connect(RA, SIGNAL(editingFinished()), this, SLOT(slotComputeCoords()));
     connect(Dec, SIGNAL(editingFinished()), this, SLOT(slotComputeCoords()));
     connect(GalLongitude, SIGNAL(editingFinished()), this, SLOT(slotComputeCoords()));
     connect(GalLatitude, SIGNAL(editingFinished()), this, SLOT(slotComputeCoords()));
 
     connect(ObjectButton, SIGNAL(clicked()), this, SLOT(slotObject()));
 
     connect(decCheckBatch, SIGNAL(clicked()), this, SLOT(slotDecCheckedBatch()));
     connect(raCheckBatch, SIGNAL(clicked()), this, SLOT(slotRaCheckedBatch()));
     connect(epochCheckBatch, SIGNAL(clicked()), this, SLOT(slotEpochCheckedBatch()));
     connect(galLongCheckBatch, SIGNAL(clicked()), this, SLOT(slotGalLongCheckedBatch()));
     connect(galLatCheckBatch, SIGNAL(clicked()), this, SLOT(slotGalLatCheckedBatch()));
     connect(runButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
 
     show();
 }
 
 modCalcGalCoord::~modCalcGalCoord()
 {
 }
 
 void modCalcGalCoord::slotObject()
 {
     QPointer<FindDialog> fd = new FindDialog(this);
     if (fd->exec() == QDialog::Accepted)
     {
         SkyObject *o = fd->targetObject();
         RA->showInHours(o->ra());
         Dec->showInDegrees(o->dec());
         slotComputeCoords();
     }
     delete fd;
 }
 
 void modCalcGalCoord::slotComputeCoords()
 {
     if (GalLongitude->hasFocus())
         GalLongitude->clearFocus();
 
     //Determine whether we should compute galactic coords from
     //equatorial, or vice versa
     if (sender()->objectName() == "GalLongitude" || sender()->objectName() == "GalLatitude")
     {
         //Validate GLong and GLat
         bool ok(false);
         dms glat;
         dms glong = GalLongitude->createDms(true, &ok);
         if (ok)
             glat = GalLatitude->createDms(true, &ok);
         if (ok)
         {
             SkyPoint sp;
             sp.GalacticToEquatorial1950(&glong, &glat);
             sp.B1950ToJ2000();
             RA->showInHours(sp.ra());
             Dec->showInDegrees(sp.dec());
         }
     }
     else
     {
         //Validate RA and Dec
         bool ok(false);
         dms dec;
         dms ra = RA->createDms(false, &ok);
         if (ok)
             dec = Dec->createDms(true, &ok);
         if (ok)
         {
             dms glong, glat;
             SkyPoint sp(ra, dec);
             sp.J2000ToB1950();
             sp.Equatorial1950ToGalactic(glong, glat);
             GalLongitude->showInDegrees(glong);
             GalLatitude->showInDegrees(glat);
         }
     }
 }
 
 void modCalcGalCoord::galCheck()
 {
     galLatCheckBatch->setChecked(false);
     galLatBoxBatch->setEnabled(false);
     galLongCheckBatch->setChecked(false);
     galLongBoxBatch->setEnabled(false);
     galInputCoords = false;
 }
 
 void modCalcGalCoord::equCheck()
 {
     raCheckBatch->setChecked(false);
     raBoxBatch->setEnabled(false);
     decCheckBatch->setChecked(false);
     decBoxBatch->setEnabled(false);
     epochCheckBatch->setChecked(false);
     galInputCoords = true;
 }
 
 void modCalcGalCoord::slotRaCheckedBatch()
 {
     if (raCheckBatch->isChecked())
     {
         raBoxBatch->setEnabled(false);
         galCheck();
     }
     else
     {
         raBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGalCoord::slotDecCheckedBatch()
 {
     if (decCheckBatch->isChecked())
     {
         decBoxBatch->setEnabled(false);
         galCheck();
     }
     else
     {
         decBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGalCoord::slotEpochCheckedBatch()
 {
     epochCheckBatch->setChecked(false);
 
     if (epochCheckBatch->isChecked())
     {
         epochBoxBatch->setEnabled(false);
         galCheck();
     }
     else
     {
         epochBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGalCoord::slotGalLatCheckedBatch()
 {
     if (galLatCheckBatch->isChecked())
     {
         galLatBoxBatch->setEnabled(false);
         equCheck();
     }
     else
     {
         galLatBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGalCoord::slotGalLongCheckedBatch()
 {
     if (galLongCheckBatch->isChecked())
     {
         galLongBoxBatch->setEnabled(false);
         equCheck();
     }
     else
     {
         galLongBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGalCoord::slotRunBatch()
 {
     const QString inputFileName = InputFileBoxBatch->url().toLocalFile();
 
     // We open the input file and read its content
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
 
         //		processLines(&f);
         QTextStream istream(&f);
         processLines(istream);
         //		readFile( istream );
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         InputFileBoxBatch->setUrl(QUrl());
     }
 }
 
 void modCalcGalCoord::processLines(QTextStream &istream)
 {
     // we open the output file
 
     //	QTextStream istream(&fIn);
     const QString outputFileName = OutputFileBoxBatch->url().toLocalFile();
     QFile fOut(outputFileName);
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     QString line;
     QChar space = ' ';
     int i       = 0;
     SkyPoint sp;
     dms raB, decB, galLatB, galLongB;
     QString epoch0B;
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
         line.trimmed();
 
         //Go through the line, looking for parameters
 
         QStringList fields = line.split(' ');
 
         i = 0;
 
         // Input coords are galactic coordinates:
 
         if (galInputCoords)
         {
             // Read Galactic Longitude and write in ostream if corresponds
 
             if (galLongCheckBatch->isChecked())
             {
                 galLongB = dms::fromString(fields[i], true);
                 i++;
             }
             else
                 galLongB = galLongBoxBatch->createDms(true);
 
             if (allRadioBatch->isChecked())
                 ostream << galLongB.toDMSString() << space;
             else if (galLongCheckBatch->isChecked())
                 ostream << galLongB.toDMSString() << space;
 
             // Read Galactic Latitude and write in ostream if corresponds
 
             if (galLatCheckBatch->isChecked())
             {
                 galLatB = dms::fromString(fields[i], true);
                 i++;
             }
             else
                 galLatB = galLatBoxBatch->createDms(true);
 
             if (allRadioBatch->isChecked())
                 ostream << galLatB.toDMSString() << space;
             else if (galLatCheckBatch->isChecked())
                 ostream << galLatB.toDMSString() << space;
 
             sp = SkyPoint();
             sp.GalacticToEquatorial1950(&galLongB, &galLatB);
             ostream << sp.ra().toHMSString() << space << sp.dec().toDMSString() << epoch0B << endl;
             // Input coords. are equatorial coordinates:
         }
         else
         {
             // Read RA and write in ostream if corresponds
 
             if (raCheckBatch->isChecked())
             {
                 raB = dms::fromString(fields[i], false);
                 i++;
             }
             else
                 raB = raBoxBatch->createDms(false);
 
             if (allRadioBatch->isChecked())
                 ostream << raB.toHMSString() << space;
             else if (raCheckBatch->isChecked())
                 ostream << raB.toHMSString() << space;
 
             // Read DEC and write in ostream if corresponds
 
             if (decCheckBatch->isChecked())
             {
                 decB = dms::fromString(fields[i], true);
                 i++;
             }
             else
                 decB = decBoxBatch->createDms();
 
             if (allRadioBatch->isChecked())
                 ostream << decB.toDMSString() << space;
             else if (decCheckBatch->isChecked())
                 ostream << decB.toDMSString() << space;
 
             // Read Epoch and write in ostream if corresponds
 
             if (epochCheckBatch->isChecked())
             {
                 epoch0B = fields[i];
                 i++;
             }
             else
                 epoch0B = epochBoxBatch->text();
 
             if (allRadioBatch->isChecked())
                 ostream << epoch0B << space;
             else if (epochCheckBatch->isChecked())
                 ostream << epoch0B << space;
 
             sp = SkyPoint(raB, decB);
             sp.J2000ToB1950();
             sp.Equatorial1950ToGalactic(galLongB, galLatB);
             ostream << galLongB.toDMSString() << space << galLatB.toDMSString() << endl;
         }
     }
 
     fOut.close();
 }
diff --git a/kstars/tools/modcalcgeodcoord.cpp b/kstars/tools/modcalcgeodcoord.cpp
index 0b7d1189d..643691090 100644
--- a/kstars/tools/modcalcgeodcoord.cpp
+++ b/kstars/tools/modcalcgeodcoord.cpp
@@ -1,404 +1,404 @@
 /***************************************************************************
                           modcalcgeodcoord.cpp  -  description
                              -------------------
     begin                : Tue Jan 15 2002
     copyright            : (C) 2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcgeodcoord.h"
 
 #include "dms.h"
 #include "geolocation.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 
 #include <KMessageBox>
 
 #include <QTextStream>
 #include <QFileDialog>
 
 modCalcGeodCoord::modCalcGeodCoord(QWidget *parentSplit) : QFrame(parentSplit)
 {
     QStringList ellipsoidList;
 
     ellipsoidList << "IAU76"
                   << "GRS80"
                   << "MERIT83"
                   << "WGS84"
                   << "IERS89";
 
     setupUi(this);
 
     spheRadio->setChecked(true);
     ellipsoidBox->insertItems(5, ellipsoidList);
     geoPlace.reset(new GeoLocation(dms(0), dms(0)));
     showLongLat();
     setEllipsoid(0);
     show();
 
     connect(Clear, SIGNAL(clicked()), this, SLOT(slotClearGeoCoords()));
     connect(Compute, SIGNAL(clicked()), this, SLOT(slotComputeGeoCoords()));
 }
 
 void modCalcGeodCoord::showLongLat(void)
 {
     KStarsData *data = KStarsData::Instance();
 
     LongGeoBox->show(data->geo()->lng());
     LatGeoBox->show(data->geo()->lat());
     AltGeoBox->setText(QString("0.0"));
 }
 
 void modCalcGeodCoord::setEllipsoid(int index)
 {
     geoPlace->changeEllipsoid(index);
 }
 
 void modCalcGeodCoord::getCartGeoCoords(void)
 {
     geoPlace->setXPos(XGeoBox->text().toDouble() * 1000.);
     geoPlace->setYPos(YGeoBox->text().toDouble() * 1000.);
     geoPlace->setZPos(ZGeoBox->text().toDouble() * 1000.);
 }
 
 void modCalcGeodCoord::getSphGeoCoords(void)
 {
     geoPlace->setLong(LongGeoBox->createDms());
     geoPlace->setLat(LatGeoBox->createDms());
     geoPlace->setHeight(AltGeoBox->text().toDouble());
 }
 
 void modCalcGeodCoord::slotClearGeoCoords(void)
 {
     geoPlace->setLong(dms(0.0));
     geoPlace->setLat(dms(0.0));
     geoPlace->setHeight(0.0);
     LatGeoBox->clearFields();
     LongGeoBox->clearFields();
 }
 
 void modCalcGeodCoord::slotComputeGeoCoords(void)
 {
     if (cartRadio->isChecked())
     {
         getCartGeoCoords();
         showSpheGeoCoords();
     }
     else
     {
         getSphGeoCoords();
         showCartGeoCoords();
     }
 }
 
 void modCalcGeodCoord::showSpheGeoCoords(void)
 {
     LongGeoBox->show(geoPlace->lng());
     LatGeoBox->show(geoPlace->lat());
     AltGeoBox->setText(QLocale().toString(geoPlace->height(), 3));
 }
 
 void modCalcGeodCoord::showCartGeoCoords(void)
 {
     XGeoBox->setText(QLocale().toString(geoPlace->xPos() / 1000., 6));
     YGeoBox->setText(QLocale().toString(geoPlace->yPos() / 1000., 6));
     ZGeoBox->setText(QLocale().toString(geoPlace->zPos() / 1000., 6));
 }
 
 void modCalcGeodCoord::geoCheck(void)
 {
     XGeoBoxBatch->setEnabled(false);
     XGeoCheckBatch->setChecked(false);
     YGeoBoxBatch->setEnabled(false);
     YGeoCheckBatch->setChecked(false);
     YGeoBoxBatch->setEnabled(false);
     YGeoCheckBatch->setChecked(false);
     xyzInputCoords = false;
 }
 
 void modCalcGeodCoord::xyzCheck(void)
 {
     LongGeoBoxBatch->setEnabled(false);
     LongGeoCheckBatch->setChecked(false);
     LatGeoBoxBatch->setEnabled(false);
     LatGeoCheckBatch->setChecked(false);
     AltGeoBoxBatch->setEnabled(false);
     AltGeoCheckBatch->setChecked(false);
     xyzInputCoords = true;
 }
 
 void modCalcGeodCoord::slotLongCheckedBatch()
 {
     if (LongGeoCheckBatch->isChecked())
     {
         LongGeoBoxBatch->setEnabled(false);
         geoCheck();
     }
     else
     {
         LongGeoBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGeodCoord::slotLatCheckedBatch()
 {
     if (LatGeoCheckBatch->isChecked())
     {
         LatGeoBoxBatch->setEnabled(false);
         geoCheck();
     }
     else
     {
         LatGeoBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGeodCoord::slotElevCheckedBatch()
 {
     if (AltGeoCheckBatch->isChecked())
     {
         AltGeoBoxBatch->setEnabled(false);
         geoCheck();
     }
     else
     {
         AltGeoBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGeodCoord::slotXCheckedBatch()
 {
     if (XGeoCheckBatch->isChecked())
     {
         XGeoBoxBatch->setEnabled(false);
         xyzCheck();
     }
     else
     {
         XGeoBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGeodCoord::slotYCheckedBatch()
 {
     if (YGeoCheckBatch->isChecked())
     {
         YGeoBoxBatch->setEnabled(false);
         xyzCheck();
     }
     else
     {
         YGeoBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcGeodCoord::slotZCheckedBatch()
 {
     if (ZGeoCheckBatch->isChecked())
     {
         ZGeoBoxBatch->setEnabled(false);
         xyzCheck();
     }
     else
     {
         ZGeoBoxBatch->setEnabled(true);
     }
 }
 void modCalcGeodCoord::slotInputFile()
 {
     const QString inputFileName = QFileDialog::getOpenFileName(KStars::Instance(), QString(), QString());
     if (!inputFileName.isEmpty())
         InputFileBoxBatch->setUrl(QUrl::fromLocalFile(inputFileName));
 }
 
 void modCalcGeodCoord::slotOutputFile()
 {
     const QString outputFileName = QFileDialog::getSaveFileName();
     if (!outputFileName.isEmpty())
         OutputFileBoxBatch->setUrl(QUrl::fromLocalFile(outputFileName));
 }
 
 void modCalcGeodCoord::slotRunBatch(void)
 {
     const QString inputFileName = InputFileBoxBatch->url().toLocalFile();
 
     // We open the input file and read its content
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
 
         //		processLines(&f);
         QTextStream istream(&f);
         processLines(istream);
         //		readFile( istream );
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         InputFileBoxBatch->setUrl(QUrl());
     }
 }
 
 void modCalcGeodCoord::processLines(QTextStream &istream)
 {
     // we open the output file
 
     //	QTextStream istream(&fIn);
     const QString outputFileName = OutputFileBoxBatch->url().toLocalFile();
     QFile fOut(outputFileName);
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     QString line;
     QChar space = ' ';
     int i       = 0;
     GeoLocation geoPl(dms(0), dms(0));
     geoPl.setEllipsoid(0);
 
     double xB, yB, zB, hB;
     dms latB, longB;
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
         line.trimmed();
 
         //Go through the line, looking for parameters
 
         QStringList fields = line.split(' ');
 
         i = 0;
 
         // Input coords are XYZ:
 
         if (xyzInputCoords)
         {
             // Read X and write in ostream if corresponds
 
             if (XGeoCheckBatch->isChecked())
             {
                 xB = fields[i].toDouble();
                 i++;
             }
             else
                 xB = XGeoBoxBatch->text().toDouble();
 
             if (AllRadioBatch->isChecked())
                 ostream << xB << space;
             else if (XGeoCheckBatch->isChecked())
                 ostream << xB << space;
 
             // Read Y and write in ostream if corresponds
 
             if (YGeoCheckBatch->isChecked())
             {
                 yB = fields[i].toDouble();
                 i++;
             }
             else
                 yB = YGeoBoxBatch->text().toDouble();
 
             if (AllRadioBatch->isChecked())
                 ostream << yB << space;
             else if (YGeoCheckBatch->isChecked())
                 ostream << yB << space;
             // Read Z and write in ostream if corresponds
 
             if (ZGeoCheckBatch->isChecked())
             {
                 zB = fields[i].toDouble();
                 i++;
             }
             else
                 zB = ZGeoBoxBatch->text().toDouble();
 
             if (AllRadioBatch->isChecked())
                 ostream << zB << space;
             else if (YGeoCheckBatch->isChecked())
                 ostream << zB << space;
 
             geoPl.setXPos(xB * 1000.0);
             geoPl.setYPos(yB * 1000.0);
             geoPl.setZPos(zB * 1000.0);
             ostream << geoPl.lng()->toDMSString() << space << geoPl.lat()->toDMSString() << space << geoPl.height()
                     << endl;
 
             // Input coords. are Long, Lat and Height
         }
         else
         {
             // Read Longitude and write in ostream if corresponds
 
             if (LongGeoCheckBatch->isChecked())
             {
                 longB = dms::fromString(fields[i], true);
                 i++;
             }
             else
                 longB = LongGeoBoxBatch->createDms(true);
 
             if (AllRadioBatch->isChecked())
                 ostream << longB.toDMSString() << space;
             else if (LongGeoCheckBatch->isChecked())
                 ostream << longB.toDMSString() << space;
 
             // Read Latitude and write in ostream if corresponds
 
             if (LatGeoCheckBatch->isChecked())
             {
                 latB = dms::fromString(fields[i], true);
                 i++;
             }
             else
                 latB = LatGeoBoxBatch->createDms(true);
 
             if (AllRadioBatch->isChecked())
                 ostream << latB.toDMSString() << space;
             else if (LatGeoCheckBatch->isChecked())
                 ostream << latB.toDMSString() << space;
 
             // Read Height and write in ostream if corresponds
 
             if (AltGeoCheckBatch->isChecked())
             {
                 hB = fields[i].toDouble();
                 i++;
             }
             else
                 hB = AltGeoBoxBatch->text().toDouble();
 
             if (AllRadioBatch->isChecked())
                 ostream << hB << space;
             else if (AltGeoCheckBatch->isChecked())
                 ostream << hB << space;
 
             geoPl.setLong(longB);
             geoPl.setLat(latB);
             geoPl.setHeight(hB);
 
             ostream << geoPl.xPos() / 1000.0 << space << geoPl.yPos() / 1000.0 << space << geoPl.zPos() / 1000.0
                     << endl;
         }
     }
 
     fOut.close();
 }
diff --git a/kstars/tools/modcalcjd.cpp b/kstars/tools/modcalcjd.cpp
index 299094009..7e8f640e7 100644
--- a/kstars/tools/modcalcjd.cpp
+++ b/kstars/tools/modcalcjd.cpp
@@ -1,257 +1,257 @@
 /***************************************************************************
                           modcalcjd.cpp  -  description
                              -------------------
     begin                : Tue Jan 15 2002
     copyright            : (C) 2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcjd.h"
 
 #include <QTextStream>
 #include <QLineEdit>
 #include <QDebug>
 
 #include <KLocalizedString>
 #include <KMessageBox>
 #include <KLineEdit>
 
 #include "kstarsdatetime.h"
 
 #define MJD0 2400000.5
 
 modCalcJD::modCalcJD(QWidget *parentSplit) : QFrame(parentSplit)
 {
     setupUi(this);
 
     // signals and slots connections
     connect(NowButton, SIGNAL(clicked()), this, SLOT(showCurrentTime()));
     connect(DateTimeBox, SIGNAL(dateTimeChanged(QDateTime)), this, SLOT(slotUpdateCalendar()));
     connect(JDBox, SIGNAL(editingFinished()), this, SLOT(slotUpdateJD()));
     connect(ModJDBox, SIGNAL(editingFinished()), this, SLOT(slotUpdateModJD()));
     connect(InputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(OutputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(RunButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
     connect(ViewButtonBatch, SIGNAL(clicked()), this, SLOT(slotViewBatch()));
 
     RunButtonBatch->setEnabled(false);
     ViewButtonBatch->setEnabled(false);
 
     showCurrentTime();
     slotUpdateCalendar();
     show();
 }
 
 modCalcJD::~modCalcJD(void)
 {
 }
 
 void modCalcJD::slotUpdateCalendar()
 {
     long double julianDay, modjulianDay;
 
     julianDay = KStarsDateTime(DateTimeBox->dateTime()).djd();
     showJd(julianDay);
 
     modjulianDay = julianDay - MJD0;
     showMjd(modjulianDay);
 }
 
 void modCalcJD::slotUpdateModJD()
 {
     long double julianDay, modjulianDay;
 
     modjulianDay = ModJDBox->text().toDouble();
     julianDay    = MJD0 + modjulianDay;
     showJd(julianDay);
     DateTimeBox->setDateTime(KStarsDateTime(julianDay));
 }
 
 void modCalcJD::slotUpdateJD()
 {
     long double julianDay, modjulianDay;
     julianDay = JDBox->text().toDouble();
     KStarsDateTime dt(julianDay);
 
     DateTimeBox->setDateTime(dt);
 
     modjulianDay = julianDay - MJD0;
     showMjd(modjulianDay);
 }
 
 void modCalcJD::showCurrentTime(void)
 {
     DateTimeBox->setDateTime(KStarsDateTime::currentDateTime());
 }
 
 void modCalcJD::showJd(long double julianDay)
 {
     JDBox->setText(QLocale().toString((double)julianDay, 5));
 }
 
 void modCalcJD::showMjd(long double modjulianDay)
 {
     ModJDBox->setText(QLocale().toString((double)modjulianDay, 5));
 }
 
 void modCalcJD::slotCheckFiles()
 {
     if (!InputFileBatch->lineEdit()->text().isEmpty() && !OutputFileBatch->lineEdit()->text().isEmpty())
     {
         RunButtonBatch->setEnabled(true);
     }
     else
     {
         RunButtonBatch->setEnabled(false);
     }
 }
 
 void modCalcJD::slotRunBatch()
 {
     QString inputFileName = InputFileBatch->url().toLocalFile();
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
 
         QTextStream istream(&f);
         processLines(istream, InputComboBatch->currentIndex());
         ViewButtonBatch->setEnabled(true);
 
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         return;
     }
 }
 
 void modCalcJD::processLines(QTextStream &istream, int inputData)
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     QString line;
     long double jd(0);
     double mjd(0);
     KStarsDateTime dt;
 
     while (!istream.atEnd())
     {
         line             = istream.readLine();
         line             = line.trimmed();
         QStringList data = line.split(' ', QString::SkipEmptyParts);
 
         if (inputData == 0) //Parse date & time
         {
             //Is the first field parseable as a date or date&time?
             if (data[0].length() > 10)
                 dt = KStarsDateTime::fromString(data[0]);
             else
                 dt = KStarsDateTime(QDate::fromString(data[0]), QTime(0, 0, 0));
 
             //DEBUG
             qDebug() << data[0];
             if (dt.isValid())
                 qDebug() << dt.toString();
 
             if (dt.isValid())
             {
                 //Try to parse the second field as a time
                 if (data.size() > 1)
                 {
                     QString s = data[1];
                     if (s.length() == 4)
                         s = '0' + s;
                     QTime t = QTime::fromString(s);
                     if (t.isValid())
                         dt.setTime(t);
                 }
             }
             else //Did not parse the first field as a date; try it as a time
             {
                 QTime t = QTime::fromString(data[0]);
                 if (t.isValid())
                 {
                     dt.setTime(t);
                     //Now try the second field as a date
                     if (data.size() > 1)
                     {
                         QDate d = QDate::fromString(data[1]);
                         if (d.isValid())
                             dt.setDate(d);
                         else
                             dt.setDate(QDate::currentDate());
                     }
                 }
             }
 
             if (dt.isValid())
             {
                 //Compute JD and MJD
                 jd  = dt.djd();
                 mjd = jd - MJD0;
             }
         }
         else if (inputData == 1) //Parse Julian day
         {
             bool ok(false);
             jd = data[0].toDouble(&ok);
             if (ok)
             {
                 dt.setDJD(jd);
                 mjd = jd - MJD0;
             }
         }
         else if (inputData == 2) //Parse Modified Julian day
         {
             bool ok(false);
             mjd = data[0].toDouble(&ok);
             if (ok)
             {
                 jd = mjd + MJD0;
                 dt.setDJD(jd);
             }
         }
 
         //Write to output file
         ostream << QLocale().toString(dt, QLocale::LongFormat) << "  " << QString::number(jd, 'f', 2) << "  "
                 << QString::number(mjd, 'f', 2) << endl;
     }
 
     fOut.close();
 }
 
 void modCalcJD::slotViewBatch()
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::ReadOnly);
     QTextStream istream(&fOut);
     QStringList text;
 
     while (!istream.atEnd())
         text.append(istream.readLine());
 
     fOut.close();
 
-    KMessageBox::informationList(0, i18n("Results of Julian day calculation"), text,
+    KMessageBox::informationList(nullptr, i18n("Results of Julian day calculation"), text,
                                  OutputFileBatch->url().toLocalFile());
 }
diff --git a/kstars/tools/modcalcplanets.cpp b/kstars/tools/modcalcplanets.cpp
index b1543227a..a5d8017dd 100644
--- a/kstars/tools/modcalcplanets.cpp
+++ b/kstars/tools/modcalcplanets.cpp
@@ -1,457 +1,457 @@
 /***************************************************************************
                           modcalcequinox.cpp  -  description
                              -------------------
     begin                : dom may 2 2004
     copyright            : (C) 2004-2005 by Pablo de Vicente
     email                : p.devicentea@wanadoo.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcplanets.h"
 
 #include "geolocation.h"
 #include "kstarsdata.h"
 #include "dialogs/locationdialog.h"
 #include "skyobjects/ksmoon.h"
 #include "skyobjects/kssun.h"
 
 modCalcPlanets::modCalcPlanets(QWidget *parentSplit) : QFrame(parentSplit)
 {
     setupUi(this);
 
     KStarsDateTime dt(KStarsDateTime::currentDateTime());
 
     DateTimeBox->setDateTime(dt);
     DateBoxBatch->setDate(dt.date());
     UTBoxBatch->setTime(dt.time());
 
     geoPlace = KStarsData::Instance()->geo();
     LocationButton->setText(geoPlace->fullName());
 
     RABox->setDegType(false);
 
     // signals and slots connections
     connect(PlanetComboBox, SIGNAL(activated(int)), this, SLOT(slotComputePosition()));
     connect(DateTimeBox, SIGNAL(dateTimeChanged(QDateTime)), this, SLOT(slotComputePosition()));
     connect(LocationButton, SIGNAL(clicked()), this, SLOT(slotLocation()));
 
     connect(UTCheckBatch, SIGNAL(clicked()), this, SLOT(slotUtCheckedBatch()));
     connect(DateCheckBatch, SIGNAL(clicked()), this, SLOT(slotDateCheckedBatch()));
     connect(LatCheckBatch, SIGNAL(clicked()), this, SLOT(slotLatCheckedBatch()));
     connect(LongCheckBatch, SIGNAL(clicked()), this, SLOT(slotLongCheckedBatch()));
     connect(PlanetCheckBatch, SIGNAL(clicked()), this, SLOT(slotPlanetsCheckedBatch()));
 
     slotComputePosition();
     show();
 }
 
 modCalcPlanets::~modCalcPlanets()
 {
 }
 
 void modCalcPlanets::slotLocation()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
 
     if (ld->exec() == QDialog::Accepted)
     {
         geoPlace = ld->selectedCity();
         LocationButton->setText(geoPlace->fullName());
         slotComputePosition();
     }
     delete ld;
 }
 
 void modCalcPlanets::slotComputePosition()
 {
     KStarsDateTime dt(DateTimeBox->dateTime());
     long double julianDay = dt.djd();
     KSNumbers num(julianDay);
     CachingDms LST(geoPlace->GSTtoLST(dt.gst()));
 
     // Earth
     KSPlanet Earth(I18N_NOOP("Earth"));
     Earth.findPosition(&num);
 
     // Earth is special case!
     if (PlanetComboBox->currentIndex() == 2)
     {
         showCoordinates(Earth);
         return;
     }
 
     // Pointer to hold planet data. Pointer is used since it has to
     // hold objects of different type. It's safe to use new/delete
     // because exceptions are disallowed.
     std::unique_ptr<KSPlanetBase> p;
 
     switch (PlanetComboBox->currentIndex())
     {
         case 0:
             p.reset(new KSPlanet(KSPlanetBase::MERCURY));
             break;
         case 1:
             p.reset(new KSPlanet(KSPlanetBase::VENUS));
             break;
         case 3:
             p.reset(new KSPlanet(KSPlanetBase::MARS));
             break;
         case 4:
             p.reset(new KSPlanet(KSPlanetBase::JUPITER));
             break;
         case 5:
             p.reset(new KSPlanet(KSPlanetBase::SATURN));
             break;
         case 6:
             p.reset(new KSPlanet(KSPlanetBase::URANUS));
             break;
         case 7:
             p.reset(new KSPlanet(KSPlanetBase::NEPTUNE));
             break;
         /*case 8:
             p.reset(new KSPluto(); break;*/
         case 8:
             p.reset(new KSMoon());
             break;
         case 9:
             p.reset(new KSSun());
             p->setRsun(0.0);
             break;
     }
     if (p.get() == nullptr)
         return;
 
     // Show data.
     p->findPosition(&num, geoPlace->lat(), &LST, &Earth);
     p->EquatorialToHorizontal(&LST, geoPlace->lat());
     showCoordinates(*p);
 }
 
 void modCalcPlanets::showCoordinates(const KSPlanetBase &ksp)
 {
     showHeliocentricEclipticCoords(ksp.helEcLong(), ksp.helEcLat(), ksp.rsun());
     showGeocentricEclipticCoords(ksp.ecLong(), ksp.ecLat(), ksp.rearth());
     showEquatorialCoords(ksp.ra(), ksp.dec());
     showTopocentricCoords(ksp.az(), ksp.alt());
 }
 
 void modCalcPlanets::showHeliocentricEclipticCoords(const dms &hLong, const dms &hLat, double dist)
 {
     HelioLongBox->show(hLong);
     HelioLatBox->show(hLat);
     HelioDistBox->setText(QLocale().toString(dist, 6));
 }
 
 void modCalcPlanets::showGeocentricEclipticCoords(const dms &eLong, const dms &eLat, double dist)
 {
     GeoLongBox->show(eLong);
     GeoLatBox->show(eLat);
     GeoDistBox->setText(QLocale().toString(dist, 6));
 }
 
 void modCalcPlanets::showEquatorialCoords(const dms &ra, const dms &dec)
 {
     RABox->show(ra, false);
     DecBox->show(dec);
 }
 
 void modCalcPlanets::showTopocentricCoords(const dms &az, const dms &el)
 {
     AzBox->show(az);
     AltBox->show(el);
 }
 
 void modCalcPlanets::slotPlanetsCheckedBatch()
 {
     PlanetComboBoxBatch->setEnabled(!PlanetCheckBatch->isChecked());
 }
 
 void modCalcPlanets::slotUtCheckedBatch()
 {
     UTBoxBatch->setEnabled(!UTCheckBatch->isChecked());
 }
 
 void modCalcPlanets::slotDateCheckedBatch()
 {
     DateBoxBatch->setEnabled(!DateCheckBatch->isChecked());
 }
 
 void modCalcPlanets::slotLongCheckedBatch()
 {
     LongBoxBatch->setEnabled(!LongCheckBatch->isChecked());
 }
 
 void modCalcPlanets::slotLatCheckedBatch()
 {
     LatBoxBatch->setEnabled(!LatCheckBatch->isChecked());
 }
 
 void modCalcPlanets::slotRunBatch()
 {
     const QString inputFileName = InputFileBoxBatch->url().toLocalFile();
 
     // We open the input file and read its content
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
 
         QTextStream istream(&f);
         processLines(istream);
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         InputFileBoxBatch->setUrl(QUrl());
     }
 }
 
 unsigned int modCalcPlanets::requiredBatchFields()
 {
     unsigned int i = 0;
 
     if (PlanetCheckBatch->isChecked())
         i++;
     if (UTCheckBatch->isChecked())
         i++;
     if (DateCheckBatch->isChecked())
         i++;
     if (LongCheckBatch->isChecked())
         i++;
     if (LatCheckBatch->isChecked())
         i++;
 
     return i;
 }
 
 void modCalcPlanets::processLines(QTextStream &istream)
 {
     // we open the output file
 
     const QString outputFileName = OutputFileBoxBatch->url().toLocalFile();
     QFile fOut(outputFileName);
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
     bool lineIsValid = true;
 
     QChar space = ' ';
     QString planetB;
     unsigned int i = 0, nline = 0;
     QTime utB;
     QDate dtB;
     CachingDms longB, latB, hlongB, hlatB, glongB, glatB, raB, decB, azmB, altB;
     double rSunB(0.0), rEarthB(0.0);
 
     //Initialize planet names
     QString pn;
     QStringList pNames, pNamesi18n;
     pNames << "Mercury"
            << "Venus"
            << "Earth"
            << "Mars"
            << "Jupiter"
            << "Saturn"
            << "Uranus"
            << "Neptune" /* << "Pluto" */
            << "Sun"
            << "Moon";
     pNamesi18n << i18n("Mercury") << i18n("Venus") << i18n("Earth") << i18n("Mars") << i18n("Jupiter") << i18n("Saturn")
                << i18n("Uranus") << i18n("Neptune") /* << i18n("Pluto") */
                << i18n("Sun") << i18n("Moon");
 
     ///Parse the input file
     int numberOfRequiredFields = requiredBatchFields();
     while (!istream.atEnd())
     {
         QString lineToWrite;
         QString line = istream.readLine();
         line.trimmed();
 
         //Go through the line, looking for parameters
 
         QStringList fields = line.split(' ');
 
         if (fields.count() != numberOfRequiredFields)
         {
             lineIsValid = false;
             qWarning() << i18n("Incorrect number of fields in line %1: ", nline)
                        << i18n("Present fields %1. ", fields.count())
                        << i18n("Required fields %1. ", numberOfRequiredFields) << endl;
             nline++;
             continue;
         }
 
         i = 0;
         if (PlanetCheckBatch->isChecked())
         {
             planetB = fields[i];
             int j   = pNamesi18n.indexOf(planetB);
             if (j == -1)
             {
                 qWarning() << i18n("Unknown planet ") << fields[i] << i18n(" in line %1: ", nline) << endl;
                 continue;
             }
             pn = pNames.at(j); //untranslated planet name
             i++;
         }
         else
         {
             planetB = PlanetComboBoxBatch->currentText();
         }
         if (AllRadioBatch->isChecked() || PlanetCheckBatch->isChecked())
         {
             lineToWrite = planetB;
             lineToWrite += space;
         }
 
         // Read Ut and write in ostream if corresponds
         if (UTCheckBatch->isChecked())
         {
             utB = QTime::fromString(fields[i]);
             if (!utB.isValid())
             {
                 qWarning() << i18n("Line %1 contains an invalid time", nline);
                 lineIsValid = false;
                 nline++;
                 continue;
             }
             i++;
         }
         else
         {
             utB = UTBoxBatch->time();
         }
         if (AllRadioBatch->isChecked() || UTCheckBatch->isChecked())
             lineToWrite += QLocale().toString(utB).append(space);
 
         // Read date and write in ostream if corresponds
         if (DateCheckBatch->isChecked())
         {
             dtB = QDate::fromString(fields[i], Qt::ISODate);
             if (!dtB.isValid())
             {
                 qWarning() << i18n("Line %1 contains an invalid date: ", nline) << fields[i] << endl;
                 lineIsValid = false;
                 nline++;
                 continue;
             }
             i++;
         }
         else
         {
             dtB = DateBoxBatch->date();
         }
         if (AllRadioBatch->isChecked() || DateCheckBatch->isChecked())
             lineToWrite += QLocale().toString(dtB, QLocale::LongFormat).append(space);
 
         // Read Longitude and write in ostream if corresponds
 
         if (LongCheckBatch->isChecked())
         {
             longB = CachingDms::fromString(fields[i], true);
             i++;
         }
         else
         {
             longB = LongBoxBatch->createDms(true);
         }
         if (AllRadioBatch->isChecked() || LongCheckBatch->isChecked())
             lineToWrite += longB.toDMSString() + space;
 
         // Read Latitude
         if (LatCheckBatch->isChecked())
         {
             latB = CachingDms::fromString(fields[i], true);
             i++;
         }
         else
         {
             latB = LatBoxBatch->createDms(true);
         }
         if (AllRadioBatch->isChecked() || LatCheckBatch->isChecked())
             lineToWrite += latB.toDMSString() + space;
 
         KStarsDateTime edt(dtB, utB);
         CachingDms LST = edt.gst() + longB;
 
         KSNumbers num(edt.djd());
         KSPlanet Earth(I18N_NOOP("Earth"));
         Earth.findPosition(&num);
 
         // FIXME: allocate new object for every iteration is probably not wisest idea.
-        KSPlanetBase *kspb = 0;
+        KSPlanetBase *kspb = nullptr;
         /*if ( pn == "Pluto" ) {
             kspb = new KSPluto();
         } else*/
         if (pn == "Sun")
         {
             kspb = new KSSun();
         }
         else if (pn == "Moon")
         {
             kspb = new KSMoon();
         }
         else
         {
             kspb = new KSPlanet(i18n(pn.toLocal8Bit()), QString(), Qt::white, 1.0);
         }
         kspb->findPosition(&num, &latB, &LST, &Earth);
         kspb->EquatorialToHorizontal(&LST, &latB);
 
         // Heliocentric Ecl. coords.
         hlongB = kspb->helEcLong();
         hlatB  = kspb->helEcLat();
         rSunB  = kspb->rsun();
         // Geocentric Ecl. coords.
         glongB  = kspb->ecLong();
         glatB   = kspb->ecLat();
         rEarthB = kspb->rearth();
         // Equatorial coords.
         decB = kspb->dec();
         raB  = kspb->ra();
         // Topocentric Coords.
         azmB = kspb->az();
         altB = kspb->alt();
 
         ostream << lineToWrite;
 
         if (HelioEclCheckBatch->isChecked())
             ostream << hlongB.toDMSString() << space << hlatB.toDMSString() << space << rSunB << space;
         if (GeoEclCheckBatch->isChecked())
             ostream << glongB.toDMSString() << space << glatB.toDMSString() << space << rEarthB << space;
         if (EquatorialCheckBatch->isChecked())
             ostream << raB.toHMSString() << space << decB.toDMSString() << space;
         if (HorizontalCheckBatch->isChecked())
             ostream << azmB.toDMSString() << space << altB.toDMSString() << space;
         ostream << endl;
 
         // Delete object
         delete kspb;
 
         nline++;
     }
 
     if (!lineIsValid)
     {
         QString message = i18n("Errors found while parsing some lines in the input file");
-        KMessageBox::sorry(0, message, i18n("Errors in lines"));
+        KMessageBox::sorry(nullptr, message, i18n("Errors in lines"));
     }
 
     fOut.close();
 }
diff --git a/kstars/tools/modcalcsidtime.cpp b/kstars/tools/modcalcsidtime.cpp
index b951bb069..89e1c0358 100644
--- a/kstars/tools/modcalcsidtime.cpp
+++ b/kstars/tools/modcalcsidtime.cpp
@@ -1,372 +1,372 @@
 /***************************************************************************
                           modcalcsidtime.cpp  -  description
                              -------------------
     begin                : Wed Jan 23 2002
     copyright            : (C) 2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcsidtime.h"
 
 #include "kstarsdata.h"
 #include "kstarsdatetime.h"
 #include "dialogs/locationdialog.h"
 
 #include <KLineEdit>
 #include <KMessageBox>
 
 #include <QTextStream>
 
 modCalcSidTime::modCalcSidTime(QWidget *parent) : QFrame(parent)
 {
     setupUi(this);
 
     //Preset date and location
     showCurrentTimeAndLocation();
 
     // signals and slots connections
     connect(LocationButton, SIGNAL(clicked()), this, SLOT(slotChangeLocation()));
     connect(Date, SIGNAL(dateChanged(QDate)), this, SLOT(slotChangeDate()));
     connect(LT, SIGNAL(timeChanged(QTime)), this, SLOT(slotConvertST(QTime)));
     connect(ST, SIGNAL(timeChanged(QTime)), this, SLOT(slotConvertLT(QTime)));
 
     connect(LocationCheckBatch, SIGNAL(clicked()), this, SLOT(slotLocationChecked()));
     connect(DateCheckBatch, SIGNAL(clicked()), this, SLOT(slotDateChecked()));
     connect(LocationCheckBatch, SIGNAL(clicked()), this, SLOT(slotHelpLabel()));
     connect(DateCheckBatch, SIGNAL(clicked()), this, SLOT(slotHelpLabel()));
     connect(ComputeComboBatch, SIGNAL(currentIndexChanged(int)), this, SLOT(slotHelpLabel()));
 
     connect(InputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(OutputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(LocationButtonBatch, SIGNAL(clicked()), this, SLOT(slotLocationBatch()));
     connect(RunButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
     connect(ViewButtonBatch, SIGNAL(clicked()), this, SLOT(slotViewBatch()));
 
     RunButtonBatch->setEnabled(false);
     ViewButtonBatch->setEnabled(false);
 
     show();
 }
 
 void modCalcSidTime::showCurrentTimeAndLocation()
 {
     KStarsData *data = KStarsData::Instance();
     LT->setTime(data->lt().time());
     Date->setDate(data->lt().date());
 
     geo = data->geo();
     LocationButton->setText(geo->fullName());
     geoBatch = data->geo();
     LocationButtonBatch->setText(geoBatch->fullName());
 
     slotConvertST(LT->time());
 }
 
 void modCalcSidTime::slotChangeLocation()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
 
     if (ld->exec() == QDialog::Accepted)
     {
         GeoLocation *newGeo = ld->selectedCity();
         if (newGeo)
         {
             geo = newGeo;
             LocationButton->setText(geo->fullName());
 
             //Update the displayed ST
             slotConvertST(LT->time());
         }
     }
     delete ld;
 }
 
 void modCalcSidTime::slotChangeDate()
 {
     slotConvertST(LT->time());
 }
 
 void modCalcSidTime::slotConvertST(const QTime &lt)
 {
     // blockSignals is used to break signal loop
     ST->blockSignals(true);
     ST->setTime(computeLTtoST(lt));
     ST->blockSignals(false);
 }
 
 void modCalcSidTime::slotConvertLT(const QTime &st)
 {
     // blockSignals is used to break signal loop
     LT->blockSignals(true);
     LT->setTime(computeSTtoLT(st));
     LT->blockSignals(false);
 }
 
 QTime modCalcSidTime::computeLTtoST(QTime lt)
 {
     KStarsDateTime utdt = geo->LTtoUT(KStarsDateTime(Date->date(), lt));
     dms st              = geo->GSTtoLST(utdt.gst());
     return QTime(st.hour(), st.minute(), st.second());
 }
 
 QTime modCalcSidTime::computeSTtoLT(QTime st)
 {
     KStarsDateTime dt0 = KStarsDateTime(Date->date(), QTime(0, 0, 0));
     dms lst;
     lst.setH(st.hour(), st.minute(), st.second());
     dms gst = geo->LSTtoGST(lst);
     return geo->UTtoLT(KStarsDateTime(Date->date(), dt0.GSTtoUT(gst))).time();
 }
 
 //** Batch mode **//
 void modCalcSidTime::slotDateChecked()
 {
     DateBatch->setEnabled(!DateCheckBatch->isChecked());
 }
 
 void modCalcSidTime::slotLocationChecked()
 {
     LocationButtonBatch->setEnabled(!LocationCheckBatch->isChecked());
 
     if (LocationCheckBatch->isChecked())
     {
         QString message = i18n("Location strings consist of the "
                                "comma-separated names of the city, province and country.  "
                                "If the string contains spaces, enclose it in quotes so it "
                                "gets parsed properly.");
 
-        KMessageBox::information(0, message, i18n("Hint for writing location strings"),
+        KMessageBox::information(nullptr, message, i18n("Hint for writing location strings"),
                                  "DontShowLocationStringMessageBox");
     }
 }
 
 void modCalcSidTime::slotHelpLabel()
 {
     QStringList inList;
     if (ComputeComboBatch->currentIndex() == 0)
         inList.append(i18n("local time"));
     else
         inList.append(i18n("sidereal time"));
 
     if (DateCheckBatch->checkState() == Qt::Checked)
         inList.append(i18n("date"));
 
     if (LocationCheckBatch->checkState() == Qt::Checked)
         inList.append(i18n("location"));
 
     QString inListString = inList[0];
     if (inList.size() == 2)
         inListString = i18n("%1 and %2", inList[0], inList[1]);
     if (inList.size() == 3)
         inListString = i18n("%1, %2 and %3", inList[0], inList[1], inList[2]);
 
     HelpLabel->setText(i18n("Specify %1 in the input file.", inListString));
 }
 
 void modCalcSidTime::slotLocationBatch()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
 
     if (ld->exec() == QDialog::Accepted)
     {
         GeoLocation *newGeo = ld->selectedCity();
         if (newGeo)
         {
             geoBatch = newGeo;
             LocationButtonBatch->setText(geoBatch->fullName());
         }
     }
     delete ld;
 }
 
 void modCalcSidTime::slotCheckFiles()
 {
     if (!InputFileBatch->lineEdit()->text().isEmpty() && !OutputFileBatch->lineEdit()->text().isEmpty())
     {
         RunButtonBatch->setEnabled(true);
     }
     else
     {
         RunButtonBatch->setEnabled(false);
     }
 }
 
 void modCalcSidTime::slotRunBatch()
 {
     QString inputFileName = InputFileBatch->url().toLocalFile();
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             inputFileName.clear();
             return;
         }
 
         QTextStream istream(&f);
         processLines(istream);
 
         ViewButtonBatch->setEnabled(true);
 
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         inputFileName.clear();
         return;
     }
 }
 
 void modCalcSidTime::processLines(QTextStream &istream)
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     QString line;
     dms LST;
     QTime inTime, outTime;
     QDate dt;
 
     if (!DateCheckBatch->isChecked())
         dt = DateBatch->date();
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
         line = line.trimmed();
 
         QStringList fields = line.split(' ', QString::SkipEmptyParts);
 
         //Find and parse the location string
         if (LocationCheckBatch->isChecked())
         {
             //First, look for a pair of quotation marks, and parse the string between them
             QChar q = '\"';
             if (line.indexOf(q) == -1)
                 q = '\'';
             if (line.count(q) == 2)
             {
                 int iStart             = line.indexOf(q);
                 int iEnd               = line.indexOf(q, iStart + 1);
                 QString locationString = line.mid(iStart, iEnd - iStart + 1);
                 line.remove(locationString);
                 fields = line.split(' ', QString::SkipEmptyParts);
                 locationString.remove(q);
 
                 QStringList locationFields = locationString.split(',', QString::SkipEmptyParts);
                 for (int i = 0; i < locationFields.size(); i++)
                     locationFields[i] = locationFields[i].trimmed();
 
                 if (locationFields.size() == 1)
                     locationFields.insert(1, "");
                 if (locationFields.size() == 2)
                     locationFields.insert(1, "");
                 if (locationFields.size() != 3)
                 {
                     qDebug() << "Error: could not parse location string: " << locationString;
                     continue;
                 }
 
                 geoBatch = KStarsData::Instance()->locationNamed(locationFields[0], locationFields[1],
                                                                  locationFields[2]);
                 if (geoBatch == nullptr)
                 {
                     qDebug() << "Error: location not found in database: " << locationString;
                     continue;
                 }
             }
         }
 
         if (DateCheckBatch->isChecked())
         {
             //Parse one of the fields as the date
             for (auto &s : fields)
             {
                 dt = QDate::fromString(s);
                 if (dt.isValid())
                     break;
             }
             if (!dt.isValid())
             {
                 qDebug() << "Error: did not find a valid date string in: " << line;
                 continue;
             }
         }
 
         //Parse one of the fields as the time
         for (auto &s : fields)
         {
             if (s.contains(':'))
             {
                 inTime = QTime::fromString(s.length() == 4 ? '0' + s : s);
                 if (inTime.isValid())
                     break;
             }
         }
         if (!inTime.isValid())
         {
             qDebug() << "Error: did not find a valid time string in: " << line;
             continue;
         }
 
         if (geoBatch != nullptr)
         {
             if (ComputeComboBatch->currentIndex() == 0)
             {
                 //inTime is the local time, compute LST
                 KStarsDateTime ksdt(dt, inTime);
                 ksdt    = geoBatch->LTtoUT(ksdt);
                 dms lst = geoBatch->GSTtoLST(ksdt.gst());
                 outTime = QTime(lst.hour(), lst.minute(), lst.second());
             }
             else
             {
                 //inTime is the sidereal time, compute the local time
                 KStarsDateTime ksdt(dt, QTime(0, 0, 0));
                 dms lst;
                 lst.setH(inTime.hour(), inTime.minute(), inTime.second());
                 QTime ut = ksdt.GSTtoUT(geoBatch->LSTtoGST(lst));
                 ksdt.setTime(ut);
                 ksdt    = geoBatch->UTtoLT(ksdt);
                 outTime = ksdt.time();
             }
         }
 
         //Write to output file
         ostream << QLocale().toString(dt, QLocale::LongFormat) << "  \"" << geoBatch->fullName() << "\"  "
                 << QLocale().toString(inTime) << "  " << QLocale().toString(outTime) << endl;
     }
 
     fOut.close();
 }
 
 void modCalcSidTime::slotViewBatch()
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::ReadOnly);
     QTextStream istream(&fOut);
     QStringList text;
 
     while (!istream.atEnd())
         text.append(istream.readLine());
 
     fOut.close();
 
-    KMessageBox::informationList(0, i18n("Results of Sidereal time calculation"), text,
+    KMessageBox::informationList(nullptr, i18n("Results of Sidereal time calculation"), text,
                                  OutputFileBatch->url().toLocalFile());
 }
diff --git a/kstars/tools/modcalcvizequinox.cpp b/kstars/tools/modcalcvizequinox.cpp
index 6844fb7f7..ae61dd6f7 100644
--- a/kstars/tools/modcalcvizequinox.cpp
+++ b/kstars/tools/modcalcvizequinox.cpp
@@ -1,383 +1,383 @@
 /***************************************************************************
                           modcalcvizequinox.cpp  -  description
                              -------------------
     begin                : Thu 22 Feb 2007
     copyright            : (C) 2007 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcvizequinox.h"
 
 #include "dms.h"
 #include "kstarsdata.h"
 #include "skyobjects/kssun.h"
 #include "widgets/dmsbox.h"
 
 #include <KLineEdit>
 #include <KPlotAxis>
 #include <KPlotObject>
 #include <KPlotPoint>
 
 #include <cmath>
 
 modCalcEquinox::modCalcEquinox(QWidget *parentSplit) : QFrame(parentSplit), dSpring(), dSummer(), dAutumn(), dWinter()
 {
     setupUi(this);
 
     connect(Year, SIGNAL(valueChanged(int)), this, SLOT(slotCompute()));
     connect(InputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(OutputFileBatch, SIGNAL(urlSelected(QUrl)), this, SLOT(slotCheckFiles()));
     connect(RunButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
     connect(ViewButtonBatch, SIGNAL(clicked()), this, SLOT(slotViewBatch()));
 
     Plot->axis(KPlotWidget::LeftAxis)->setLabel(i18n("Sun's Declination"));
     Plot->setTopPadding(40);
     //Don't draw Top & Bottom axes; custom axes drawn as plot objects
     Plot->axis(KPlotWidget::BottomAxis)->setVisible(false);
     Plot->axis(KPlotWidget::TopAxis)->setVisible(false);
 
     //This will call slotCompute():
     Year->setValue(KStarsData::Instance()->lt().date().year());
 
     RunButtonBatch->setEnabled(false);
     ViewButtonBatch->setEnabled(false);
 
     show();
 }
 
 modCalcEquinox::~modCalcEquinox()
 {
 }
 
 double modCalcEquinox::dmonth(int i)
 {
     Q_ASSERT(i >= 0 && i < 12 && "Month must be in 0 .. 11 range");
     return DMonth[i];
 }
 
 void modCalcEquinox::slotCheckFiles()
 {
     RunButtonBatch->setEnabled(!InputFileBatch->lineEdit()->text().isEmpty() &&
                                !OutputFileBatch->lineEdit()->text().isEmpty());
 }
 
 void modCalcEquinox::slotRunBatch()
 {
     QString inputFileName = InputFileBatch->url().toLocalFile();
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             inputFileName.clear();
             return;
         }
 
         QTextStream istream(&f);
         processLines(istream);
 
         ViewButtonBatch->setEnabled(true);
 
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         inputFileName.clear();
         return;
     }
 }
 
 void modCalcEquinox::processLines(QTextStream &istream)
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
     int originalYear = Year->value();
 
     //Write header to output file
     ostream << i18n("# Timing of Equinoxes and Solstices\n") << i18n("# computed by KStars\n#\n")
             << i18n("# Vernal Equinox\t\tSummer Solstice\t\t\tAutumnal Equinox\t\tWinter Solstice\n#\n");
 
     while (!istream.atEnd())
     {
         QString line = istream.readLine();
         bool ok      = false;
         int year     = line.toInt(&ok);
 
         //for now I will simply change the value of the Year widget to trigger
         //computation of the Equinoxes and Solstices.
         if (ok)
         {
             //triggers slotCompute(), which sets values of dSpring et al.:
             Year->setValue(year);
 
             //Write to output file
             ostream << QLocale().toString(dSpring.date(), QLocale::LongFormat) << "\t"
                     << QLocale().toString(dSummer.date(), QLocale::LongFormat) << "\t"
                     << QLocale().toString(dAutumn.date(), QLocale::LongFormat) << "\t"
                     << QLocale().toString(dWinter.date(), QLocale::LongFormat) << endl;
         }
     }
 
     if (Year->value() != originalYear)
         Year->setValue(originalYear);
 }
 
 void modCalcEquinox::slotViewBatch()
 {
     QFile fOut(OutputFileBatch->url().toLocalFile());
     fOut.open(QIODevice::ReadOnly);
     QTextStream istream(&fOut);
     QStringList text;
 
     while (!istream.atEnd())
         text.append(istream.readLine());
 
     fOut.close();
 
-    KMessageBox::informationList(0, i18n("Results of Sidereal time calculation"), text,
+    KMessageBox::informationList(nullptr, i18n("Results of Sidereal time calculation"), text,
                                  OutputFileBatch->url().toLocalFile());
 }
 
 void modCalcEquinox::slotCompute()
 {
     KStarsData *data = KStarsData::Instance();
     KSSun Sun;
     int year0 = Year->value();
 
     KStarsDateTime dt(QDate(year0, 1, 1), QTime(0, 0, 0));
     long double jd0 = dt.djd(); //save JD on Jan 1st
     for (int imonth = 0; imonth < 12; imonth++)
     {
         KStarsDateTime kdt(QDate(year0, imonth + 1, 1), QTime(0, 0, 0));
         DMonth[imonth] = kdt.djd() - jd0;
     }
 
     Plot->removeAllPlotObjects();
 
     //Add the celestial equator, just a single line bisecting the plot horizontally
     KPlotObject *ce = new KPlotObject(data->colorScheme()->colorNamed("EqColor"), KPlotObject::Lines, 2.0);
     ce->addPoint(0.0, 0.0);
     ce->addPoint(366.0, 0.0);
     Plot->addPlotObject(ce);
 
     // Tropic of cancer
     KPlotObject *tcan = new KPlotObject(data->colorScheme()->colorNamed("EqColor"), KPlotObject::Lines, 2.0);
     tcan->addPoint(0.0, 23.5);
     tcan->addPoint(366.0, 23.5);
     Plot->addPlotObject(tcan);
 
     // Tropic of capricorn
     KPlotObject *tcap = new KPlotObject(data->colorScheme()->colorNamed("EqColor"), KPlotObject::Lines, 2.0);
     tcap->addPoint(0.0, -23.5);
     tcap->addPoint(366.0, -23.5);
     Plot->addPlotObject(tcap);
 
     //Add Ecliptic.  This is more complicated than simply incrementing the
     //ecliptic longitude, because we want the x-axis to be time, not RA.
     //For each day in the year, compute the Sun's position.
     KPlotObject *ecl = new KPlotObject(data->colorScheme()->colorNamed("EclColor"), KPlotObject::Lines, 2);
     ecl->setLinePen(QPen(ecl->pen().color(), 4));
 
     Plot->setLimits(1.0, double(dt.date().daysInYear()), -30.0, 30.0);
 
     //Add top and bottom axis lines, and custom tickmarks at each month
     addDateAxes();
 
     for (int i = 1; i <= dt.date().daysInYear(); i++)
     {
         KSNumbers num(dt.djd());
         Sun.findPosition(&num);
         ecl->addPoint(double(i), Sun.dec().Degrees());
 
         dt = dt.addDays(1);
     }
     Plot->addPlotObject(ecl);
 
     dSpring = findEquinox(Year->value(), true, ecl);
     dSummer = findSolstice(Year->value(), true);
     dAutumn = findEquinox(Year->value(), false, ecl);
     dWinter = findSolstice(Year->value(), false);
 
     //Display the Date/Time of each event in the text fields
     VEquinox->setText(QLocale().toString(dSpring, QLocale::LongFormat));
     SSolstice->setText(QLocale().toString(dSummer, QLocale::LongFormat));
     AEquinox->setText(QLocale().toString(dAutumn, QLocale::LongFormat));
     WSolstice->setText(QLocale().toString(dWinter, QLocale::LongFormat));
 
     //Add vertical dotted lines at times of the equinoxes and solstices
     KPlotObject *poSpring = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
     poSpring->setLinePen(QPen(Qt::white, 1.0, Qt::DotLine));
     poSpring->addPoint(dSpring.djd() - jd0, Plot->dataRect().top());
     poSpring->addPoint(dSpring.djd() - jd0, Plot->dataRect().bottom());
     Plot->addPlotObject(poSpring);
     KPlotObject *poSummer = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
     poSummer->setLinePen(QPen(Qt::white, 1.0, Qt::DotLine));
     poSummer->addPoint(dSummer.djd() - jd0, Plot->dataRect().top());
     poSummer->addPoint(dSummer.djd() - jd0, Plot->dataRect().bottom());
     Plot->addPlotObject(poSummer);
     KPlotObject *poAutumn = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
     poAutumn->setLinePen(QPen(Qt::white, 1.0, Qt::DotLine));
     poAutumn->addPoint(dAutumn.djd() - jd0, Plot->dataRect().top());
     poAutumn->addPoint(dAutumn.djd() - jd0, Plot->dataRect().bottom());
     Plot->addPlotObject(poAutumn);
     KPlotObject *poWinter = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
     poWinter->setLinePen(QPen(Qt::white, 1.0, Qt::DotLine));
     poWinter->addPoint(dWinter.djd() - jd0, Plot->dataRect().top());
     poWinter->addPoint(dWinter.djd() - jd0, Plot->dataRect().bottom());
     Plot->addPlotObject(poWinter);
 }
 
 //Add custom top/bottom axes with tickmarks for each month
 void modCalcEquinox::addDateAxes()
 {
     KPlotObject *poTopAxis = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
     poTopAxis->addPoint(0.0, Plot->dataRect().bottom()); //y-axis is reversed!
     poTopAxis->addPoint(366.0, Plot->dataRect().bottom());
     Plot->addPlotObject(poTopAxis);
 
     KPlotObject *poBottomAxis = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
     poBottomAxis->addPoint(0.0, Plot->dataRect().top() + 0.02);
     poBottomAxis->addPoint(366.0, Plot->dataRect().top() + 0.02);
     Plot->addPlotObject(poBottomAxis);
 
     //Tick mark for each month
     for (int imonth = 0; imonth < 12; imonth++)
     {
         KPlotObject *poMonth = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
         poMonth->addPoint(dmonth(imonth), Plot->dataRect().top());
         poMonth->addPoint(dmonth(imonth), Plot->dataRect().top() + 1.4);
         Plot->addPlotObject(poMonth);
         poMonth = new KPlotObject(Qt::white, KPlotObject::Lines, 1);
         poMonth->addPoint(dmonth(imonth), Plot->dataRect().bottom());
         poMonth->addPoint(dmonth(imonth), Plot->dataRect().bottom() - 1.4);
         Plot->addPlotObject(poMonth);
     }
 }
 
 KStarsDateTime modCalcEquinox::findEquinox(int year, bool Spring, KPlotObject *ecl)
 {
     // Interpolate to find the moment when the Sun crosses the equator
     // Set initial guess in February or August to be sure that this
     // point is before equinox.
     const int month = Spring ? 2 : 8;
     int i           = QDate(year, month, 1).dayOfYear();
     double dec1, dec2;
     dec2 = ecl->points().at(i)->y();
     do
     {
         ++i;
         dec1 = dec2;
         dec2 = ecl->points().at(i)->y();
     } while (dec1 * dec2 > 0.0); //when dec1*dec2<0.0, we bracket the zero
 
     double x1 = ecl->points().at(i-1)->x();
     double x2 = ecl->points().at(i)->x();
     double d  = fabs(dec2 - dec1);
     double f  = 1.0 - fabs(dec2) / d; //fractional distance of the zero, from point1 to point2
 
     KStarsDateTime dt0(QDate(year, 1, 1), QTime(0, 0, 0));
     KStarsDateTime dt = dt0.addSecs(86400.0 * (x1 - 1 + f * (x2 - x1)));
     return dt;
 }
 
 KStarsDateTime modCalcEquinox::findSolstice(int year, bool Summer)
 {
     //Find the moment when the Sun reaches maximum declination
     //First find three points which bracket the maximum (i.e., x2 > x1,x3)
     //Start at June 16th, which will always be approaching the solstice
 
     long double jd1, jd2, jd3, jd4;
     double y2(0.0), y3(0.0), y4(0.0);
     int month = 6;
     if (!Summer)
         month = 12;
 
     jd3 = KStarsDateTime(QDate(year, month, 16), QTime(0, 0, 0)).djd();
     KSNumbers num(jd3);
     KSSun Sun;
     Sun.findPosition(&num);
     y3 = Sun.dec().Degrees();
 
     int sgn = 1;
     if (!Summer)
         sgn = -1; //find minimum if the winter solstice is sought
 
     do
     {
         jd3 += 1.0;
         num.updateValues(jd3);
         Sun.findPosition(&num);
         y2 = y3;
         Sun.findPosition(&num);
         y3 = Sun.dec().Degrees();
     } while (y3 * sgn > y2 * sgn);
 
     //Ok, now y2 is larger(smaller) than both y3 and y1.
     // Never read back
 //    jd2 = jd3 - 1.0;
     jd1 = jd3 - 2.0;
 
     //Choose a new starting jd2 that follows the golden ratio:
     // a/b = 1.618; a+b = 2...a = 0.76394
     jd2 = jd1 + 0.76394;
     num.updateValues(jd2);
     Sun.findPosition(&num);
     y2 = Sun.dec().Degrees();
 
     while (jd3 - jd1 > 0.0005) //sub-minute pecision
     {
         jd4 = jd1 + jd3 - jd2;
 
         num.updateValues(jd4);
         Sun.findPosition(&num);
         y4 = Sun.dec().Degrees();
 
         if (y4 * sgn > y2 * sgn) //make jd4 the new center
         {
             if (jd4 > jd2)
             {
                 jd1 = jd2;
                 jd2 = jd4;
                 y2  = y4;
             }
             else
             {
                 jd3 = jd2;
                 // Never read back
 //                y3  = y2;
                 jd2 = jd4;
                 y2  = y4;
             }
         }
         else //make jd4 a new endpoint
         {
             if (jd4 > jd2)
             {
                 jd3 = jd4;
                 // Never read back
 //                y3  = y4;
             }
             else
             {
                 jd1 = jd4;
             }
         }
     }
 
     return KStarsDateTime(jd2);
 }
diff --git a/kstars/tools/modcalcvlsr.cpp b/kstars/tools/modcalcvlsr.cpp
index 877720142..a74f12091 100644
--- a/kstars/tools/modcalcvlsr.cpp
+++ b/kstars/tools/modcalcvlsr.cpp
@@ -1,514 +1,514 @@
 /***************************************************************************
                           modcalcvlsr.cpp  -  description
                              -------------------
     begin                : sun mar 13 2005
     copyright            : (C) 2005 by Pablo de Vicente
     email                : p.devicente@wanadoo.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "modcalcvlsr.h"
 
 #include <QPointer>
 #include <QFileDialog>
 
 #include <KLocalizedString>
 #include <KMessageBox>
 
 #include "ksnumbers.h"
 #include "dms.h"
 #include "skyobjects/skypoint.h"
 #include "geolocation.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "kstarsdatetime.h"
 #include "widgets/dmsbox.h"
 #include "dialogs/locationdialog.h"
 #include "dialogs/finddialog.h"
 
 modCalcVlsr::modCalcVlsr(QWidget *parentSplit) : QFrame(parentSplit), velocityFlag(0)
 {
     setupUi(this);
     RA->setDegType(false);
 
     Date->setDateTime(KStarsDateTime::currentDateTime());
     initGeo();
 
     VLSR->setValidator(new QDoubleValidator(VLSR));
     VHelio->setValidator(new QDoubleValidator(VHelio));
     VGeo->setValidator(new QDoubleValidator(VGeo));
     VTopo->setValidator(new QDoubleValidator(VTopo));
 
     // signals and slots connections
     connect(Date, SIGNAL(dateTimeChanged(QDateTime)), this, SLOT(slotCompute()));
     connect(NowButton, SIGNAL(clicked()), this, SLOT(slotNow()));
     connect(LocationButton, SIGNAL(clicked()), this, SLOT(slotLocation()));
     connect(ObjectButton, SIGNAL(clicked()), this, SLOT(slotFindObject()));
     connect(RA, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
     connect(Dec, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
     connect(VLSR, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
     connect(VHelio, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
     connect(VGeo, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
     connect(VTopo, SIGNAL(editingFinished()), this, SLOT(slotCompute()));
 
     connect(RunButtonBatch, SIGNAL(clicked()), this, SLOT(slotRunBatch()));
 
     show();
 }
 
 modCalcVlsr::~modCalcVlsr()
 {
 }
 
 void modCalcVlsr::initGeo(void)
 {
     geoPlace = KStarsData::Instance()->geo();
     LocationButton->setText(geoPlace->fullName());
 }
 
 void modCalcVlsr::slotNow()
 {
     Date->setDateTime(KStarsDateTime::currentDateTime());
     slotCompute();
 }
 
 void modCalcVlsr::slotFindObject()
 {
     QPointer<FindDialog> fd = new FindDialog(KStars::Instance());
     if (fd->exec() == QDialog::Accepted)
     {
         SkyObject *o = fd->targetObject();
         RA->showInHours(o->ra0());
         Dec->showInDegrees(o->dec0());
     }
     delete fd;
 }
 
 void modCalcVlsr::slotLocation()
 {
     QPointer<LocationDialog> ld(new LocationDialog(this));
 
     if (ld->exec() == QDialog::Accepted && ld)
     {
         GeoLocation *newGeo = ld->selectedCity();
         if (newGeo)
         {
             geoPlace = newGeo;
             LocationButton->setText(geoPlace->fullName());
         }
     }
     delete ld;
 
     slotCompute();
 }
 
 void modCalcVlsr::slotCompute()
 {
     bool ok1(false), ok2(false);
     SkyPoint sp(RA->createDms(false, &ok1), Dec->createDms(true, &ok2));
     if (!ok1 || !ok2)
         return;
 
     KStarsDateTime dt(Date->dateTime());
     double vst[3];
 
     geoPlace->TopocentricVelocity(vst, dt.gst());
 
     if (sender()->objectName() == "VLSR")
         velocityFlag = 0;
     if (sender()->objectName() == "VHelio")
         velocityFlag = 1;
     if (sender()->objectName() == "VGeo")
         velocityFlag = 2;
     if (sender()->objectName() == "VTopo")
         velocityFlag = 3;
 
     switch (velocityFlag)
     {
         case 0: //Hold VLSR constant, compute the others
         {
             double vlsr   = VLSR->text().toDouble();
             double vhelio = sp.vHeliocentric(vlsr, dt.djd());
             double vgeo   = sp.vGeocentric(vhelio, dt.djd());
 
             VHelio->setText(QString::number(vhelio));
             VGeo->setText(QString::number(vgeo));
             VTopo->setText(QString::number(sp.vTopocentric(vgeo, vst)));
             break;
         }
 
         case 1: //Hold VHelio constant, compute the others
         {
             double vhelio = VHelio->text().toDouble();
             double vlsr   = sp.vHelioToVlsr(vhelio, dt.djd());
             double vgeo   = sp.vGeocentric(vhelio, dt.djd());
 
             VLSR->setText(QString::number(vlsr));
             VGeo->setText(QString::number(vgeo));
             VTopo->setText(QString::number(sp.vTopocentric(vgeo, vst)));
             break;
         }
 
         case 2: //Hold VGeo constant, compute the others
         {
             double vgeo   = VGeo->text().toDouble();
             double vhelio = sp.vGeoToVHelio(vgeo, dt.djd());
             double vlsr   = sp.vHelioToVlsr(vhelio, dt.djd());
 
             VLSR->setText(QString::number(vlsr));
             VHelio->setText(QString::number(vhelio));
             VTopo->setText(QString::number(sp.vTopocentric(vgeo, vst)));
             break;
         }
 
         case 3: //Hold VTopo constant, compute the others
         {
             double vtopo  = VTopo->text().toDouble();
             double vgeo   = sp.vTopoToVGeo(vtopo, vst);
             double vhelio = sp.vGeoToVHelio(vgeo, dt.djd());
             double vlsr   = sp.vHelioToVlsr(vhelio, dt.djd());
 
             VLSR->setText(QString::number(vlsr));
             VHelio->setText(QString::number(vhelio));
             VGeo->setText(QString::number(vgeo));
             break;
         }
 
         default: //oops
             qDebug() << "Error: do not know which velocity to use for input.";
             break;
     }
 }
 
 void modCalcVlsr::slotUtChecked()
 {
     if (UTCheckBatch->isChecked())
         UTBoxBatch->setEnabled(false);
     else
     {
         UTBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcVlsr::slotDateChecked()
 {
     if (DateCheckBatch->isChecked())
         DateBoxBatch->setEnabled(false);
     else
     {
         DateBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcVlsr::slotRaChecked()
 {
     if (RACheckBatch->isChecked())
     {
         RABoxBatch->setEnabled(false);
     }
     else
     {
         RABoxBatch->setEnabled(true);
     }
 }
 
 void modCalcVlsr::slotDecChecked()
 {
     if (DecCheckBatch->isChecked())
     {
         DecBoxBatch->setEnabled(false);
     }
     else
     {
         DecBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcVlsr::slotEpochChecked()
 {
     if (EpochCheckBatch->isChecked())
         EpochBoxBatch->setEnabled(false);
     else
         EpochBoxBatch->setEnabled(true);
 }
 
 void modCalcVlsr::slotLongChecked()
 {
     if (LongCheckBatch->isChecked())
         LongitudeBoxBatch->setEnabled(false);
     else
         LongitudeBoxBatch->setEnabled(true);
 }
 
 void modCalcVlsr::slotLatChecked()
 {
     if (LatCheckBatch->isChecked())
         LatitudeBoxBatch->setEnabled(false);
     else
     {
         LatitudeBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcVlsr::slotHeightChecked()
 {
     if (ElevationCheckBatch->isChecked())
         ElevationBoxBatch->setEnabled(false);
     else
     {
         ElevationBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcVlsr::slotVlsrChecked()
 {
     if (InputVelocityCheckBatch->isChecked())
         InputVelocityBoxBatch->setEnabled(false);
     else
     {
         InputVelocityBoxBatch->setEnabled(true);
     }
 }
 
 void modCalcVlsr::slotInputFile()
 {
     const QString inputFileName = QFileDialog::getOpenFileName(KStars::Instance(), QString(), QString());
     if (!inputFileName.isEmpty())
         InputFileBoxBatch->setUrl(QUrl::fromLocalFile(inputFileName));
 }
 
 void modCalcVlsr::slotOutputFile()
 {
     const QString outputFileName = QFileDialog::getSaveFileName();
     if (!outputFileName.isEmpty())
         OutputFileBoxBatch->setUrl(QUrl::fromLocalFile(outputFileName));
 }
 
 void modCalcVlsr::slotRunBatch()
 {
     const QString inputFileName = InputFileBoxBatch->url().toLocalFile();
 
     // We open the input file and read its content
 
     if (QFile::exists(inputFileName))
     {
         QFile f(inputFileName);
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
 
         //		processLines(&f);
         QTextStream istream(&f);
         processLines(istream);
         //		readFile( istream );
         f.close();
     }
     else
     {
         QString message = i18n("Invalid file: %1", inputFileName);
-        KMessageBox::sorry(0, message, i18n("Invalid file"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid file"));
         InputFileBoxBatch->setUrl(QUrl());
     }
 }
 
 void modCalcVlsr::processLines(QTextStream &istream)
 {
     // we open the output file
 
     //	QTextStream istream(&fIn);
     QString outputFileName;
     outputFileName = OutputFileBoxBatch->url().toLocalFile();
     QFile fOut(outputFileName);
     fOut.open(QIODevice::WriteOnly);
     QTextStream ostream(&fOut);
 
     QString line;
     QChar space = ' ';
     int i       = 0;
     long double jd0;
     SkyPoint spB;
     double sra, cra, sdc, cdc;
     dms raB, decB, latB, longB;
     QString epoch0B;
     double vhB, vgB, vtB, vlsrB, heightB;
     double vtopo[3];
     QTime utB;
     QDate dtB;
     KStarsDateTime dt0B;
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
         line.trimmed();
 
         //Go through the line, looking for parameters
 
         QStringList fields = line.split(' ');
 
         i = 0;
 
         // Read Ut and write in ostream if corresponds
 
         if (UTCheckBatch->isChecked())
         {
             utB = QTime::fromString(fields[i]);
             i++;
         }
         else
             utB = UTBoxBatch->time();
 
         if (AllRadioBatch->isChecked())
             ostream << QLocale().toString(utB) << space;
         else if (UTCheckBatch->isChecked())
             ostream << QLocale().toString(utB) << space;
 
         // Read date and write in ostream if corresponds
 
         if (DateCheckBatch->isChecked())
         {
             dtB = QDate::fromString(fields[i]);
             i++;
         }
         else
             dtB = DateBoxBatch->date();
         if (AllRadioBatch->isChecked())
             ostream << QLocale().toString(dtB, QLocale::LongFormat).append(space);
         else if (DateCheckBatch->isChecked())
             ostream << QLocale().toString(dtB, QLocale::LongFormat).append(space);
 
         // Read RA and write in ostream if corresponds
 
         if (RACheckBatch->isChecked())
         {
             raB = dms::fromString(fields[i], false);
             i++;
         }
         else
             raB = RABoxBatch->createDms(false);
 
         if (AllRadioBatch->isChecked())
             ostream << raB.toHMSString() << space;
         else if (RACheckBatch->isChecked())
             ostream << raB.toHMSString() << space;
 
         // Read DEC and write in ostream if corresponds
 
         if (DecCheckBatch->isChecked())
         {
             decB = dms::fromString(fields[i], true);
             i++;
         }
         else
             decB = DecBoxBatch->createDms();
 
         if (AllRadioBatch->isChecked())
             ostream << decB.toDMSString() << space;
         else if (DecCheckBatch->isChecked())
             ostream << decB.toDMSString() << space;
 
         // Read Epoch and write in ostream if corresponds
 
         if (EpochCheckBatch->isChecked())
         {
             epoch0B = fields[i];
             i++;
         }
         else
             epoch0B = EpochBoxBatch->text();
 
         if (AllRadioBatch->isChecked())
             ostream << epoch0B << space;
         else if (EpochCheckBatch->isChecked())
             ostream << epoch0B << space;
 
         // Read vlsr and write in ostream if corresponds
 
         if (InputVelocityCheckBatch->isChecked())
         {
             vlsrB = fields[i].toDouble();
             i++;
         }
         else
             vlsrB = InputVelocityComboBatch->currentText().toDouble();
 
         if (AllRadioBatch->isChecked())
             ostream << vlsrB << space;
         else if (InputVelocityCheckBatch->isChecked())
             ostream << vlsrB << space;
 
         // Read Longitude and write in ostream if corresponds
 
         if (LongCheckBatch->isChecked())
         {
             longB = dms::fromString(fields[i], true);
             i++;
         }
         else
             longB = LongitudeBoxBatch->createDms(true);
 
         if (AllRadioBatch->isChecked())
             ostream << longB.toDMSString() << space;
         else if (LongCheckBatch->isChecked())
             ostream << longB.toDMSString() << space;
 
         // Read Latitude
 
         if (LatCheckBatch->isChecked())
         {
             latB = dms::fromString(fields[i], true);
             i++;
         }
         else
             latB = LatitudeBoxBatch->createDms(true);
         if (AllRadioBatch->isChecked())
             ostream << latB.toDMSString() << space;
         else if (LatCheckBatch->isChecked())
             ostream << latB.toDMSString() << space;
 
         // Read height and write in ostream if corresponds
 
         if (ElevationCheckBatch->isChecked())
         {
             heightB = fields[i].toDouble();
             i++;
         }
         else
             heightB = ElevationBoxBatch->text().toDouble();
 
         if (AllRadioBatch->isChecked())
             ostream << heightB << space;
         else if (ElevationCheckBatch->isChecked())
             ostream << heightB << space;
 
         // We make the first calculations
 
         spB = SkyPoint(raB, decB);
         dt0B.setFromEpoch(epoch0B);
         vhB = spB.vHeliocentric(vlsrB, dt0B.djd());
         jd0 = KStarsDateTime(dtB, utB).djd();
         vgB = spB.vGeocentric(vlsrB, jd0);
         geoPlace->setLong(longB);
         geoPlace->setLat(latB);
         geoPlace->setHeight(heightB);
         dms gsidt = KStarsDateTime(dtB, utB).gst();
         geoPlace->TopocentricVelocity(vtopo, gsidt);
         spB.ra().SinCos(sra, cra);
         spB.dec().SinCos(sdc, cdc);
         vtB = vgB - (vtopo[0] * cdc * cra + vtopo[1] * cdc * sra + vtopo[2] * sdc);
 
         ostream << vhB << space << vgB << space << vtB << endl;
     }
 
     fOut.close();
 }
diff --git a/kstars/tools/observinglist.cpp b/kstars/tools/observinglist.cpp
index 33cdb7361..c6fe81a0a 100644
--- a/kstars/tools/observinglist.cpp
+++ b/kstars/tools/observinglist.cpp
@@ -1,1675 +1,1675 @@
 /***************************************************************************
                           observinglist.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 29 Nov 2004
     copyright            : (C) 2004-2014 by Jeff Woods, Jason Harris,
                            Prakash Mohan, Akarsh Simha
     email                : jcwoods@bellsouth.net, jharris@30doradus.org,
                            prakash.mohan@kdemail.net, akarsh@kde.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "observinglist.h"
 
 #include "config-kstars.h"
 
 #include "constellationboundarylines.h"
 #include "fov.h"
 #include "imageviewer.h"
 #include "ksalmanac.h"
 #include "ksdssdownloader.h"
 #include "kspaths.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "ksutils.h"
 #include "obslistpopupmenu.h"
 #include "obslistwizard.h"
 #include "Options.h"
 #include "sessionsortfilterproxymodel.h"
 #include "skymap.h"
 #include "thumbnailpicker.h"
 #include "dialogs/detaildialog.h"
 #include "dialogs/finddialog.h"
 #include "dialogs/locationdialog.h"
 #include "oal/execute.h"
 #include "skycomponents/skymapcomposite.h"
 #include "skyobjects/starobject.h"
 #include "tools/altvstime.h"
 #include "tools/eyepiecefield.h"
 #include "tools/wutdialog.h"
 
 #ifdef HAVE_INDI
 #include <basedevice.h>
 #include "indi/indilistener.h"
 #include "indi/drivermanager.h"
 #include "indi/driverinfo.h"
 #include "ekos/ekosmanager.h"
 #endif
 
 #include <KPlotting/KPlotAxis>
 #include <KPlotting/KPlotObject>
 
 #include <kstars_debug.h>
 
 //
 // ObservingListUI
 // ---------------------------------
 ObservingListUI::ObservingListUI(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 //
 // ObservingList
 // ---------------------------------
 ObservingList::ObservingList()
-    : QDialog((QWidget *)KStars::Instance()), LogObject(0), m_CurrentObject(0), isModified(false), m_dl(0)
+    : QDialog((QWidget *)KStars::Instance()), LogObject(nullptr), m_CurrentObject(nullptr), isModified(false), m_dl(nullptr)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     ui                      = new ObservingListUI(this);
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(ui);
     setWindowTitle(i18n("Observation Planner"));
 
     setLayout(mainLayout);
 
     dt = KStarsDateTime::currentDateTime();
     setFocusPolicy(Qt::StrongFocus);
     geo            = KStarsData::Instance()->geo();
     sessionView    = false;
     m_listFileName = QString();
     pmenu.reset(new ObsListPopupMenu());
     //Set up the Table Views
     m_WishListModel.reset(new QStandardItemModel(0, 5, this));
     m_SessionModel.reset(new QStandardItemModel(0, 5));
 
     m_WishListModel->setHorizontalHeaderLabels(
         QStringList() << i18n("Name") << i18n("Alternate Name") << i18nc("Right Ascension", "RA (J2000)")
                       << i18nc("Declination", "Dec (J2000)") << i18nc("Magnitude", "Mag") << i18n("Type")
                       << i18n("Current Altitude"));
     m_SessionModel->setHorizontalHeaderLabels(
         QStringList() << i18n("Name") << i18n("Alternate Name") << i18nc("Right Ascension", "RA (J2000)")
                       << i18nc("Declination", "Dec (J2000)") << i18nc("Magnitude", "Mag") << i18n("Type")
                       << i18nc("Constellation", "Constell.") << i18n("Time") << i18nc("Altitude", "Alt")
                       << i18nc("Azimuth", "Az"));
 
     m_WishListSortModel.reset(new QSortFilterProxyModel(this));
     m_WishListSortModel->setSourceModel(m_WishListModel.get());
     m_WishListSortModel->setDynamicSortFilter(true);
     m_WishListSortModel->setSortRole(Qt::UserRole);
     ui->WishListView->setModel(m_WishListSortModel.get());
     ui->WishListView->horizontalHeader()->setStretchLastSection(true);
 
     ui->WishListView->horizontalHeader()->setSectionResizeMode(QHeaderView::Interactive);
     m_SessionSortModel.reset(new SessionSortFilterProxyModel());
     m_SessionSortModel->setSourceModel(m_SessionModel.get());
     m_SessionSortModel->setDynamicSortFilter(true);
     ui->SessionView->setModel(m_SessionSortModel.get());
     ui->SessionView->horizontalHeader()->setStretchLastSection(true);
     ui->SessionView->horizontalHeader()->setSectionResizeMode(QHeaderView::Interactive);
     ksal.reset(new KSAlmanac);
     ksal->setLocation(geo);
     ui->avt->setGeoLocation(geo);
     ui->avt->setSunRiseSetTimes(ksal->getSunRise(), ksal->getSunSet());
     ui->avt->setLimits(-12.0, 12.0, -90.0, 90.0);
     ui->avt->axis(KPlotWidget::BottomAxis)->setTickLabelFormat('t');
     ui->avt->axis(KPlotWidget::BottomAxis)->setLabel(i18n("Local Time"));
     ui->avt->axis(KPlotWidget::TopAxis)->setTickLabelFormat('t');
     ui->avt->axis(KPlotWidget::TopAxis)->setTickLabelsShown(true);
     ui->DateEdit->setDate(dt.date());
     ui->SetLocation->setText(geo->fullName());
     ui->ImagePreview->installEventFilter(this);
     ui->WishListView->viewport()->installEventFilter(this);
     ui->WishListView->installEventFilter(this);
     ui->SessionView->viewport()->installEventFilter(this);
     ui->SessionView->installEventFilter(this);
     // setDefaultImage();
     //Connections
     connect(ui->WishListView, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(slotCenterObject()));
     connect(ui->WishListView->selectionModel(),
             SIGNAL(selectionChanged(QItemSelection,QItemSelection)), this, SLOT(slotNewSelection()));
     connect(ui->SessionView->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
             this, SLOT(slotNewSelection()));
     connect(ui->WUTButton, SIGNAL(clicked()), this, SLOT(slotWUT()));
     connect(ui->FindButton, SIGNAL(clicked()), this, SLOT(slotFind()));
     connect(ui->OpenButton, SIGNAL(clicked()), this, SLOT(slotOpenList()));
     connect(ui->SaveButton, SIGNAL(clicked()), this, SLOT(slotSaveSession()));
     connect(ui->SaveAsButton, SIGNAL(clicked()), this, SLOT(slotSaveSessionAs()));
     connect(ui->WizardButton, SIGNAL(clicked()), this, SLOT(slotWizard()));
     connect(ui->SetLocation, SIGNAL(clicked()), this, SLOT(slotLocation()));
     connect(ui->Update, SIGNAL(clicked()), this, SLOT(slotUpdate()));
     connect(ui->DeleteImage, SIGNAL(clicked()), this, SLOT(slotDeleteCurrentImage()));
     connect(ui->SearchImage, SIGNAL(clicked()), this, SLOT(slotSearchImage()));
     connect(ui->SetTime, SIGNAL(clicked()), this, SLOT(slotSetTime()));
     connect(ui->tabWidget, SIGNAL(currentChanged(int)), this, SLOT(slotChangeTab(int)));
     connect(ui->saveImages, SIGNAL(clicked()), this, SLOT(slotSaveAllImages()));
     connect(ui->DeleteAllImages, SIGNAL(clicked()), this, SLOT(slotDeleteAllImages()));
     connect(ui->OALExport, SIGNAL(clicked()), this, SLOT(slotOALExport()));
     connect(ui->clearListB, SIGNAL(clicked()), this, SLOT(slotClearList()));
     //Add icons to Push Buttons
     ui->OpenButton->setIcon(QIcon::fromTheme("document-open", QIcon(":/icons/breeze/default/document-open.svg")));
     ui->OpenButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     ui->SaveButton->setIcon(QIcon::fromTheme("document-save", QIcon(":/icons/breeze/default/document-save.svg")));
     ui->SaveButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     ui->SaveAsButton->setIcon(
         QIcon::fromTheme("document-save-as", QIcon(":/icons/breeze/default/document-save-as.svg")));
     ui->SaveAsButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     ui->WizardButton->setIcon(QIcon::fromTheme("tools-wizard", QIcon(":/icons/breeze/default/tools-wizard.svg")));
     ui->WizardButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     noSelection = true;
     showScope   = false;    
     ui->NotesEdit->setEnabled(false);
     ui->SetTime->setEnabled(false);
     ui->TimeEdit->setEnabled(false);
     ui->SearchImage->setEnabled(false);
     ui->saveImages->setEnabled(false);
     ui->DeleteImage->setEnabled(false);
     ui->OALExport->setEnabled(false);
 
     m_NoImagePixmap =
         QPixmap(":/images/noimage.png")
             .scaled(ui->ImagePreview->width(), ui->ImagePreview->height(), Qt::KeepAspectRatio, Qt::FastTransformation);
     m_altCostHelper = [this](const SkyPoint &p) -> QStandardItem * {
         const double inf = std::numeric_limits<double>::infinity();
         double altCost   = 0.;
         QString itemText;
         double maxAlt = p.maxAlt(*(geo->lat()));
         if (Options::obsListDemoteHole() && maxAlt > 90. - Options::obsListHoleSize())
             maxAlt = 90. - Options::obsListHoleSize();
         if (maxAlt <= 0.)
         {
             altCost  = -inf;
             itemText = i18n("Never rises");
         }
         else
         {
             altCost = (p.alt().Degrees() / maxAlt) * 100.;
             if (altCost < 0)
                 itemText = i18nc("Short text to describe that object has not risen yet", "Not risen");
             else
             {
                 if (altCost > 100.)
                 {
                     altCost  = -inf;
                     itemText = i18nc("Object is in the Dobsonian hole", "In hole");
                 }
                 else
                     itemText = QString::number(altCost, 'f', 0) + '%';
             }
         }
 
         QStandardItem *altItem = new QStandardItem(itemText);
         altItem->setData(altCost, Qt::UserRole);
         //        qCDebug(KSTARS) << "Updating altitude for " << p.ra().toHMSString() << " " << p.dec().toDMSString() << " alt = " << p.alt().toDMSString() << " info to " << itemText;
         return altItem;
     };
 
 // Needed to fix weird bug on Windows that started with Qt 5.9 that makes the title bar
 // not visible and therefore dialog not movable.
 #ifdef Q_OS_WIN
     move(100,100);
 #endif
 }
 
 ObservingList::~ObservingList()
 {
 }
 
 // Show Event
 
 void ObservingList::showEvent(QShowEvent *)
 {
     // ONLY run for first ever load
 
     if (m_initialWishlistLoad == false)
     {
         m_initialWishlistLoad = true;
 
         slotLoadWishList(); //Load the wishlist from disk if present
-        m_CurrentObject = 0;
+        m_CurrentObject = nullptr;
         setSaveImagesButton();    
 
         slotUpdateAltitudes();
         m_altitudeUpdater = new QTimer(this);
         connect(m_altitudeUpdater, SIGNAL(timeout()), this, SLOT(slotUpdateAltitudes()));
         m_altitudeUpdater->start(120000); // update altitudes every 2 minutes
     }
 }
 
 //SLOTS
 
 void ObservingList::slotAddObject(const SkyObject *_obj, bool session, bool update)
 {
     bool addToWishList = true;
     if (!_obj)
         _obj = SkyMap::Instance()->clickedObject(); // Eh? Why? Weird default behavior.
 
     if (!_obj)
     {
         qCWarning(KSTARS) << "Trying to add null object to observing list! Ignoring.";
         return;
     }
 
     QString finalObjectName = getObjectName(_obj);
 
     if (finalObjectName.isEmpty())
     {
-        KMessageBox::sorry(0, i18n("Unnamed stars are not supported in the observing lists"));
+        KMessageBox::sorry(nullptr, i18n("Unnamed stars are not supported in the observing lists"));
         return;
     }
 
     //First, make sure object is not already in the list
     QSharedPointer<SkyObject> obj = findObject(_obj);
     if (obj)
     {
         addToWishList = false;
         if (!session)
         {
             KStars::Instance()->statusBar()->showMessage(
                 i18n("%1 is already in your wishlist.", finalObjectName),
                 0); // FIXME: This message is too inconspicuous if using the Find dialog to add
             return;
         }
     }
     else
     {
         assert(!findObject(_obj, session));
         qCDebug(KSTARS) << "Cloned object " << finalObjectName << " to add to observing list.";
         obj = QSharedPointer<SkyObject>(
             _obj->clone()); // Use a clone in case the original SkyObject is deleted due to change in catalog configuration.
     }
 
     if (session && sessionList().contains(obj))
     {
         KStars::Instance()->statusBar()->showMessage(i18n("%1 is already in the session plan.", finalObjectName), 0);
         return;
     }
 
     // JM: If we are loading observing list from disk, solar system objects magnitudes are not calculated until later
     // Therefore, we manual invoke updateCoords to force computation of magnitude.
     if ((obj->type() == SkyObject::COMET || obj->type() == SkyObject::ASTEROID || obj->type() == SkyObject::MOON ||
          obj->type() == SkyObject::PLANET) &&
         obj->mag() == 0)
     {
         KSNumbers num(dt.djd());
         CachingDms LST = geo->GSTtoLST(dt.gst());
         obj->updateCoords(&num, true, geo->lat(), &LST, true);
     }
 
     QString smag = "--";
     if (-30.0 < obj->mag() && obj->mag() < 90.0)
         smag = QString::number(obj->mag(), 'f', 2); // The lower limit to avoid display of unrealistic comet magnitudes
 
     SkyPoint p = obj->recomputeHorizontalCoords(dt, geo);
 
     QList<QStandardItem *> itemList;
 
     auto getItemWithUserRole = [](const QString &itemText) -> QStandardItem * {
         QStandardItem *ret = new QStandardItem(itemText);
         ret->setData(itemText, Qt::UserRole);
         return ret;
     };
 
     // Fill itemlist with items that are common to both wishlist additions and session plan additions
     auto populateItemList = [&getItemWithUserRole, &itemList, &finalObjectName, obj, &p, &smag]() {
         itemList.clear();
         QStandardItem *keyItem = getItemWithUserRole(finalObjectName);
         keyItem->setData(QVariant::fromValue<void *>(static_cast<void *>(obj.data())), Qt::UserRole + 1);
         itemList
             << keyItem // NOTE: The rest of the methods assume that the SkyObject pointer is available in the first column!
             << getItemWithUserRole(obj->translatedLongName()) << getItemWithUserRole(p.ra0().toHMSString())
             << getItemWithUserRole(p.dec0().toDMSString()) << getItemWithUserRole(smag)
             << getItemWithUserRole(obj->typeName());
     };
 
     //Insert object in the Wish List
     if (addToWishList)
     {
         m_WishList.append(obj);
         m_CurrentObject = obj.data();
 
         //QString ra, dec;
         //ra = "";//p.ra().toHMSString();
         //dec = p.dec().toDMSString();
 
         populateItemList();
         // FIXME: Instead sort by a "clever" observability score, calculated as follows:
         //     - First sort by (max altitude) - (current altitude) rounded off to the nearest
         //     - Weight by declination - latitude (in the northern hemisphere, southern objects get higher precedence)
         //     - Demote objects in the hole
         SkyPoint p = obj->recomputeHorizontalCoords(KStarsDateTime::currentDateTimeUtc(), geo); // Current => now
         itemList << m_altCostHelper(p);
         m_WishListModel->appendRow(itemList);
 
         //Note addition in statusbar
         KStars::Instance()->statusBar()->showMessage(i18n("Added %1 to observing list.", finalObjectName), 0);
         ui->WishListView->resizeColumnsToContents();
         if (!update)
             slotSaveList();
     }
     //Insert object in the Session List
     if (session)
     {
         m_SessionList.append(obj);
         dt.setTime(TimeHash.value(finalObjectName, obj->transitTime(dt, geo)));
         dms lst(geo->GSTtoLST(dt.gst()));
         p.EquatorialToHorizontal(&lst, geo->lat());
 
         QString alt = "--", az = "--";
 
         QStandardItem *BestTime = new QStandardItem();
         /* QString ra, dec;
          if(obj->name() == "star" ) {
             ra = obj->ra0().toHMSString();
             dec = obj->dec0().toDMSString();
             BestTime->setData( QString( "--" ), Qt::DisplayRole );
         }
         else {*/
         BestTime->setData(TimeHash.value(finalObjectName, obj->transitTime(dt, geo)), Qt::DisplayRole);
         alt = p.alt().toDMSString();
         az  = p.az().toDMSString();
         //}
         // TODO: Change the rest of the parameters to their appropriate datatypes.
         populateItemList();
         itemList << getItemWithUserRole(KSUtils::constNameToAbbrev(
                         KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(obj.data())))
                  << BestTime << getItemWithUserRole(alt) << getItemWithUserRole(az);
 
         m_SessionModel->appendRow(itemList);
         //Adding an object should trigger the modified flag
         isModified = true;
         ui->SessionView->resizeColumnsToContents();
         //Note addition in statusbar
         KStars::Instance()->statusBar()->showMessage(i18n("Added %1 to session list.", finalObjectName), 0);
     }
     setSaveImagesButton();
 }
 
 void ObservingList::slotRemoveObject(const SkyObject *_o, bool session, bool update)
 {
     if (!update) // EH?!
     {
         if (!_o)
             _o = SkyMap::Instance()->clickedObject();
         else if (sessionView) //else if is needed as clickedObject should not be removed from the session list.
             session = true;
     }
 
     // Is the pointer supplied in our own lists?
     const QList<QSharedPointer<SkyObject>> &list = (session ? sessionList() : obsList());
     QStandardItemModel *currentModel             = (session ? m_SessionModel.get() : m_WishListModel.get());
 
     QSharedPointer<SkyObject> o = findObject(_o, session);
     if (!o)
     {
         qWarning() << "Object (name: " << getObjectName(o.data())
                    << ") supplied to ObservingList::slotRemoveObject() was not found in the "
                    << QString(session ? "session" : "observing") << " list!";
         return;
     }
 
     int k = list.indexOf(o);
     assert(k >= 0);
 
     // Remove from hash
     ImagePreviewHash.remove(o.data());
 
     if (o.data() == LogObject)
         saveCurrentUserLog();
 
     //Remove row from the TableView model
     // FIXME: Is there no faster way?
     for (int irow = 0; irow < currentModel->rowCount(); ++irow)
     {
         QString name = currentModel->item(irow, 0)->text();
         if (getObjectName(o.data()) == name)
         {
             currentModel->removeRow(irow);
             break;
         }
     }
 
     if (!session)
     {
         obsList().removeAt(k);
         ui->avt->removeAllPlotObjects();
         ui->WishListView->resizeColumnsToContents();
         if (!update)
             slotSaveList();
     }
     else
     {
         if (!update)
             TimeHash.remove(o->name());
         sessionList().removeAt(k); //Remove from the session list
         isModified = true;         //Removing an object should trigger the modified flag
         ui->avt->removeAllPlotObjects();
         ui->SessionView->resizeColumnsToContents();
     }
 }
 
 void ObservingList::slotRemoveSelectedObjects()
 {
     //Find each object by name in the session list, and remove it
     //Go backwards so item alignment doesn't get screwed up as rows are removed.
     for (int irow = getActiveModel()->rowCount() - 1; irow >= 0; --irow)
     {
         bool rowSelected;
         if (sessionView)
             rowSelected = ui->SessionView->selectionModel()->isRowSelected(irow, QModelIndex());
         else
             rowSelected = ui->WishListView->selectionModel()->isRowSelected(irow, QModelIndex());
 
         if (rowSelected)
         {
             QModelIndex sortIndex, index;
             sortIndex    = getActiveSortModel()->index(irow, 0);
             index        = getActiveSortModel()->mapToSource(sortIndex);
             SkyObject *o = static_cast<SkyObject *>(index.data(Qt::UserRole + 1).value<void *>());
             Q_ASSERT(o);
             slotRemoveObject(o, sessionView);
         }
     }
 
     if (sessionView)
     {
         //we've removed all selected objects, so clear the selection
         ui->SessionView->selectionModel()->clear();
         //Update the lists in the Execute window as well
         KStarsData::Instance()->executeSession()->init();
     }
 
     setSaveImagesButton();
     ui->ImagePreview->setCursor(Qt::ArrowCursor);
 }
 
 void ObservingList::slotNewSelection()
 {
     bool found      = false;
     singleSelection = false;
     noSelection     = false;
     showScope       = false;
     //ui->ImagePreview->clearPreview();
     //ui->ImagePreview->setPixmap(QPixmap());
     ui->ImagePreview->setCursor(Qt::ArrowCursor);
     QModelIndexList selectedItems;
     QString newName;
     QSharedPointer<SkyObject> o;
     QString labelText;
     ui->DeleteImage->setEnabled(false);
 
     selectedItems =
         getActiveSortModel()->mapSelectionToSource(getActiveView()->selectionModel()->selection()).indexes();
 
     if (selectedItems.size() == getActiveModel()->columnCount())
     {
         newName         = selectedItems[0].data().toString();
         singleSelection = true;
         //Find the selected object in the SessionList,
         //then break the loop.  Now SessionList.current()
         //points to the new selected object (until now it was the previous object)
         for (auto& o_temp : getActiveList())
         {
             if (getObjectName(o_temp.data()) == newName)
             {
                 o = o_temp;
                 found = true;
                 break;
             }
         }
     }
 
     if (singleSelection)
     {
         //Enable buttons
         ui->ImagePreview->setCursor(Qt::PointingHandCursor);
 #ifdef HAVE_INDI
         showScope = true;
 #endif
         if (found)
         {
             m_CurrentObject = o.data();
             //QPoint pos(0,0);
             plot(o.data());
             //Change the m_currentImageFileName, DSS/SDSS Url to correspond to the new object
             setCurrentImage(o.data());
             ui->SearchImage->setEnabled(true);
             if (newName != i18n("star"))
             {
                 //Display the current object's user notes in the NotesEdit
                 //First, save the last object's user log to disk, if necessary
                 saveCurrentUserLog(); //uses LogObject, which is still the previous obj.
                 //set LogObject to the new selected object
                 LogObject = currentObject();                
                 ui->NotesEdit->setEnabled(true);                
                 if (LogObject->userLog().isEmpty())
                 {
                     ui->NotesEdit->setPlainText(
                         i18n("Record here observation logs and/or data on %1.", getObjectName(LogObject)));
                 }
                 else
                 {
                     ui->NotesEdit->setPlainText(LogObject->userLog());
                 }
                 if (sessionView)
                 {
                     ui->TimeEdit->setEnabled(true);
                     ui->SetTime->setEnabled(true);
                     ui->TimeEdit->setTime(TimeHash.value(o->name(), o->transitTime(dt, geo)));
                 }
             }
             else //selected object is named "star"
             {
                 //clear the log text box
                 saveCurrentUserLog();                
                 ui->NotesEdit->clear();
                 ui->NotesEdit->setEnabled(false);
                 ui->SearchImage->setEnabled(false);
             }
             QString ImagePath = KSPaths::locate(QStandardPaths::GenericDataLocation, m_currentImageFileName);
             if (!ImagePath.isEmpty())
             {
                 //If the image is present, show it!
                 KSDssImage ksdi(ImagePath);
                 KSDssImage::Metadata md = ksdi.getMetadata();
                 //ui->ImagePreview->showPreview( QUrl::fromLocalFile( ksdi.getFileName() ) );
                 if (ImagePreviewHash.contains(o.data()) == false)
                     ImagePreviewHash[o.data()] = QPixmap(ksdi.getFileName()).scaledToHeight(ui->ImagePreview->width());
 
                 //ui->ImagePreview->setPixmap(QPixmap(ksdi.getFileName()).scaledToHeight(ui->ImagePreview->width()));
                 ui->ImagePreview->setPixmap(ImagePreviewHash[o.data()]);
                 if (md.isValid())
                 {
                     ui->dssMetadataLabel->setText(
                         i18n("DSS Image metadata: \n Size: %1\' x %2\' \n Photometric band: %3 \n Version: %4",
                              QString::number(md.width), QString::number(md.height), QString() + md.band, md.version));
                 }
                 else
                     ui->dssMetadataLabel->setText(i18n("No image info available."));
                 ui->ImagePreview->show();
                 ui->DeleteImage->setEnabled(true);
             }
             else
             {
                 setDefaultImage();
                 ui->dssMetadataLabel->setText(
                     i18n("No image available. Click on the placeholder image to download one."));
             }
             QString cname =
                 KStarsData::Instance()->skyComposite()->constellationBoundary()->constellationName(o.data());
             if (o->type() != SkyObject::CONSTELLATION)
             {
                 labelText = "<b>";
                 if (o->type() == SkyObject::PLANET)
                     labelText += o->translatedName();
                 else
                     labelText += o->name();
                 if (std::isfinite(o->mag()) && o->mag() <= 30.)
                     labelText += ":</b> " + i18nc("%1 magnitude of object, %2 type of sky object (planet, asteroid "
                                                   "etc), %3 name of a constellation",
                                                   "%1 mag %2 in %3", o->mag(), o->typeName().toLower(), cname);
                 else
                     labelText +=
                         ":</b> " + i18nc("%1 type of sky object (planet, asteroid etc), %2 name of a constellation",
                                          "%1 in %2", o->typeName(), cname);
             }
         }
         else
         {
             setDefaultImage();
             qCWarning(KSTARS) << "Object " << newName << " not found in list.";
         }
         ui->quickInfoLabel->setText(labelText);
     }
     else
     {
         if (selectedItems.size() == 0) //Nothing selected
         {
             //Disable buttons
             noSelection = true;            
             ui->NotesEdit->setEnabled(false);
-            m_CurrentObject = 0;
+            m_CurrentObject = nullptr;
             ui->TimeEdit->setEnabled(false);
             ui->SetTime->setEnabled(false);
             ui->SearchImage->setEnabled(false);
             //Clear the user log text box.
             saveCurrentUserLog();
             ui->NotesEdit->setPlainText("");
             //Clear the plot in the AVTPlotwidget
             ui->avt->removeAllPlotObjects();
         }
         else //more than one object selected.
         {            
             ui->NotesEdit->setEnabled(false);
             ui->TimeEdit->setEnabled(false);
             ui->SetTime->setEnabled(false);
             ui->SearchImage->setEnabled(false);
-            m_CurrentObject = 0;
+            m_CurrentObject = nullptr;
             //Clear the plot in the AVTPlotwidget
             ui->avt->removeAllPlotObjects();
             //Clear the user log text box.
             saveCurrentUserLog();
             ui->NotesEdit->setPlainText("");
             ui->quickInfoLabel->setText(QString());
         }
     }
 }
 
 void ObservingList::slotCenterObject()
 {
     if (getSelectedItems().size() == 1)
     {
         SkyMap::Instance()->setClickedObject(currentObject());
         SkyMap::Instance()->setClickedPoint(currentObject());
         SkyMap::Instance()->slotCenter();
     }
 }
 
 void ObservingList::slotSlewToObject()
 {
 #ifdef HAVE_INDI
 
     if (INDIListener::Instance()->size() == 0)
     {
         KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
         return;
     }
 
     foreach (ISD::GDInterface *gd, INDIListener::Instance()->getDevices())
     {
         INDI::BaseDevice *bd = gd->getBaseDevice();
 
         if (gd->getType() != KSTARS_TELESCOPE)
             continue;
 
         if (bd == nullptr)
             continue;
 
         if (bd->isConnected() == false)
         {
             KMessageBox::error(0,
                                i18n("Telescope %1 is offline. Please connect and retry again.", gd->getDeviceName()));
             return;
         }
 
         ISD::GDSetCommand SlewCMD(INDI_SWITCH, "ON_COORD_SET", "TRACK", ISS_ON, this);
 
         gd->setProperty(&SlewCMD);
         gd->runCommand(INDI_SEND_COORDS, currentObject());
 
         return;
     }
 
     KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
 
 #endif
 }
 
 void ObservingList::slotAddToEkosScheduler()
 {
 #ifdef HAVE_INDI
     KStars::Instance()->ekosManager()->addObjectToScheduler(currentObject());
 #endif
 }
 
 //FIXME: This will open multiple Detail windows for each object;
 //Should have one window whose target object changes with selection
 void ObservingList::slotDetails()
 {
     if (currentObject())
     {
         QPointer<DetailDialog> dd =
             new DetailDialog(currentObject(), KStarsData::Instance()->ut(), geo, KStars::Instance());
         dd->exec();
         delete dd;
     }
 }
 
 void ObservingList::slotWUT()
 {
     KStarsDateTime lt = dt;
     lt.setTime(QTime(8, 0, 0));
     QPointer<WUTDialog> w = new WUTDialog(KStars::Instance(), sessionView, geo, lt);
     w->exec();
     delete w;
 }
 
 void ObservingList::slotAddToSession()
 {
     Q_ASSERT(!sessionView);
     if (getSelectedItems().size())
     {
         foreach (const QModelIndex &i, getSelectedItems())
         {
             foreach (QSharedPointer<SkyObject> o, obsList())
                 if (getObjectName(o.data()) == i.data().toString())
                     slotAddObject(
                         o.data(),
                         true); // FIXME: Would be good to have a wrapper that accepts QSharedPointer<SkyObject>
         }
     }
 }
 
 void ObservingList::slotFind()
 {
     QPointer<FindDialog> fd = new FindDialog(KStars::Instance());
     if (fd->exec() == QDialog::Accepted)
     {
         SkyObject *o = fd->targetObject();
-        if (o != 0)
+        if (o != nullptr)
         {
             slotAddObject(o, sessionView);
         }
     }
     delete fd;
 }
 
 void ObservingList::slotEyepieceView()
 {
     KStars::Instance()->slotEyepieceView(currentObject(), getCurrentImagePath());
 }
 
 void ObservingList::slotAVT()
 {
     QModelIndexList selectedItems;
     // TODO: Think and see if there's a more effecient way to do this. I can't seem to think of any, but this code looks like it could be improved. - Akarsh
     selectedItems =
         (sessionView ?
              m_SessionSortModel->mapSelectionToSource(ui->SessionView->selectionModel()->selection()).indexes() :
              m_WishListSortModel->mapSelectionToSource(ui->WishListView->selectionModel()->selection()).indexes());
 
     if (selectedItems.size())
     {
         QPointer<AltVsTime> avt = new AltVsTime(KStars::Instance());
         foreach (const QModelIndex &i, selectedItems)
         {
             if (i.column() == 0)
             {
                 SkyObject *o = static_cast<SkyObject *>(i.data(Qt::UserRole + 1).value<void *>());
                 Q_ASSERT(o);
                 avt->processObject(o);
             }
         }
         avt->exec();
         delete avt;
     }
 }
 
 //FIXME: On close, we will need to close any open Details/AVT windows
 void ObservingList::slotClose()
 {
     //Save the current User log text
     saveCurrentUserLog();
     ui->avt->removeAllPlotObjects();
     slotNewSelection();
     saveCurrentList();
     hide();
 }
 
 void ObservingList::saveCurrentUserLog()
 {
     if (LogObject && !ui->NotesEdit->toPlainText().isEmpty() &&
         ui->NotesEdit->toPlainText() !=
             i18n("Record here observation logs and/or data on %1.", getObjectName(LogObject)))
     {
         LogObject->saveUserLog(ui->NotesEdit->toPlainText());
         ui->NotesEdit->clear();
         LogObject = nullptr;
     }
 }
 
 void ObservingList::slotOpenList()
 {
     QUrl fileURL = QFileDialog::getOpenFileUrl(KStars::Instance(), i18n("Open Observing List"), QUrl(),
                                                "KStars Observing List (*.obslist)");
     QFile f;
 
     if (fileURL.isValid())
     {
         f.setFileName(fileURL.toLocalFile());
         //FIXME do we still need to do this?
         /*
         if ( ! fileURL.isLocalFile() ) {
             //Save remote list to a temporary local file
             QTemporaryFile tmpfile;
             tmpfile.setAutoRemove(false);
             tmpfile.open();
             m_listFileName = tmpfile.fileName();
             if( KIO::NetAccess::download( fileURL, m_listFileName, this ) )
                 f.setFileName( m_listFileName );
 
         } else {
             m_listFileName = fileURL.toLocalFile();
             f.setFileName( m_listFileName );
         }
         */
 
         if (!f.open(QIODevice::ReadOnly))
         {
             QString message = i18n("Could not open file %1", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             return;
         }
         saveCurrentList(); //See if the current list needs to be saved before opening the new one
         ui->tabWidget->setCurrentIndex(1);
         slotChangeTab(1);
 
         sessionList().clear();
         TimeHash.clear();
-        m_CurrentObject = 0;
+        m_CurrentObject = nullptr;
         m_SessionModel->removeRows(0, m_SessionModel->rowCount());
         //First line is the name of the list. The rest of the file is
         //object names, one per line. With the TimeHash value if present
         QTextStream istream(&f);
         QString input;
         input = istream.readAll();
         OAL::Log logObject;
         logObject.readBegin(input);
         //Set the New TimeHash
         TimeHash = logObject.timeHash();
         geo      = logObject.geoLocation();
         dt       = logObject.dateTime();
         //foreach (SkyObject *o, *(logObject.targetList()))
         for (auto &o : logObject.targetList())
             slotAddObject(o.data(), true);
         //Update the location and user set times from file
         slotUpdate();
         //Newly-opened list should not trigger isModified flag
         isModified = false;
         f.close();
     }
     else if (!fileURL.toLocalFile().isEmpty())
     {
-        KMessageBox::sorry(0, i18n("The specified file is invalid"));
+        KMessageBox::sorry(nullptr, i18n("The specified file is invalid"));
     }
 }
 
 void ObservingList::slotClearList()
 {
     if ((ui->tabWidget->currentIndex() == 0 && obsList().isEmpty()) ||
         (ui->tabWidget->currentIndex() == 1 && sessionList().isEmpty()))
         return;
 
     QString message = i18n("Are you sure you want to clear all objects?");
     if (KMessageBox::questionYesNo(this, message, i18n("Clear all?")) == KMessageBox::Yes)
     {
         // Did I forget anything else to remove?
         ui->avt->removeAllPlotObjects();
         m_CurrentObject = LogObject = nullptr;
 
         if (ui->tabWidget->currentIndex() == 0)
         {
             // IMPORTANT: Is this enough or we will have dangling pointers in memory?
             ImagePreviewHash.clear();
             obsList().clear();
             m_WishListModel->setRowCount(0);
         }
         else
         {
             // IMPORTANT: Is this enough or we will have dangling pointers in memory?
             sessionList().clear();
             TimeHash.clear();
             isModified = true; //Removing an object should trigger the modified flag
             m_SessionModel->setRowCount(0);
         }
     }
 }
 
 void ObservingList::saveCurrentList()
 {
     //Before loading a new list, do we need to save the current one?
     //Assume that if the list is empty, then there's no need to save
     if (sessionList().size())
     {
         if (isModified)
         {
             QString message = i18n("Do you want to save the current session?");
             if (KMessageBox::questionYesNo(this, message, i18n("Save Current session?"), KStandardGuiItem::save(),
                                            KStandardGuiItem::discard()) == KMessageBox::Yes)
                 slotSaveSession();
         }
     }
 }
 
 void ObservingList::slotSaveSessionAs(bool nativeSave)
 {
     if (sessionList().isEmpty())
         return;
 
     QUrl fileURL = QFileDialog::getSaveFileUrl(KStars::Instance(), i18n("Save Observing List"), QUrl(),
                                                "KStars Observing List (*.obslist)");
     if (fileURL.isValid())
     {
         m_listFileName = fileURL.toLocalFile();
         slotSaveSession(nativeSave);
     }
 }
 
 void ObservingList::slotSaveList()
 {
     QFile f;
     // FIXME: Move wishlist into a database.
     // TODO: Support multiple wishlists.
 
     QString fileContents;
     QTextStream ostream(
         &fileContents); // We first write to a QString to prevent truncating the file in case there is a crash.
     foreach (const QSharedPointer<SkyObject> o, obsList())
     {
         if (!o)
         {
             qWarning() << "Null entry in observing wishlist! Skipping!";
             continue;
         }
         if (o->name() == "star")
         {
             //ostream << o->name() << "  " << o->ra0().Hours() << "  " << o->dec0().Degrees() << endl;
             ostream << getObjectName(o.data(), false) << endl;
         }
         else if (o->type() == SkyObject::STAR)
         {
             Q_ASSERT(dynamic_cast<const StarObject *>(o.data()));
             const QSharedPointer<StarObject> s = qSharedPointerCast<StarObject>(o);
             if (s->name() == s->gname())
                 ostream << s->name2() << endl;
             else
                 ostream << s->name() << endl;
         }
         else
         {
             ostream << o->name() << endl;
         }
     }
     f.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "wishlist.obslist");
     if (!f.open(QIODevice::WriteOnly))
     {
         qWarning() << "Cannot save wish list to file!"; // TODO: This should be presented as a message box to the user
         return;
     }
     QTextStream writeemall(&f);
     writeemall << fileContents;
     f.close();
 }
 
 void ObservingList::slotLoadWishList()
 {
     QFile f;
     f.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "wishlist.obslist");
     if (!f.open(QIODevice::ReadOnly))
     {
         qWarning(KSTARS) << "No WishList Saved yet";
         return;
     }
     QTextStream istream(&f);
     QString line;
 
     QPointer<QProgressDialog> addingObjectsProgress = new QProgressDialog();
     addingObjectsProgress->setWindowTitle(i18n("Observing List Wizard"));
     addingObjectsProgress->setLabelText(i18n("Please wait while loading objects..."));
     addingObjectsProgress->setMaximum(0);
     addingObjectsProgress->setMinimum(0);
     addingObjectsProgress->show();
     while (!istream.atEnd())
     {
         line = istream.readLine();
         //If the object is named "star", add it by coordinates
         SkyObject *o;
         /*if ( line.startsWith( QLatin1String( "star" ) ) ) {
             QStringList fields = line.split( ' ', QString::SkipEmptyParts );
             dms ra = dms::fromString( fields[1], false ); //false = hours
             dms dc = dms::fromString( fields[2], true );  //true  = degrees
             SkyPoint p( ra, dc );
             double maxrad = 1000.0/Options::zoomFactor();
             o = ks->data()->skyComposite()->starNearest( &p, maxrad );
         }
         else {*/
         o = KStarsData::Instance()->objectNamed(line);
         //}
         //If we haven't identified the object, try interpreting the
         //name as a star's genetive name (with ascii letters)
         if (!o)
             o = KStarsData::Instance()->skyComposite()->findStarByGenetiveName(line);
         if (o)
             slotAddObject(o, false, true);
         if (addingObjectsProgress->wasCanceled())
             break;
         qApp->processEvents();
     }
     delete (addingObjectsProgress);
     f.close();
 }
 
 void ObservingList::slotSaveSession(bool nativeSave)
 {
     if (sessionList().isEmpty())
     {
-        KMessageBox::error(0, i18n("Cannot save an empty session list!"));
+        KMessageBox::error(nullptr, i18n("Cannot save an empty session list!"));
         return;
     }
 
     if (m_listFileName.isEmpty())
     {
         slotSaveSessionAs(nativeSave);
         return;
     }
     QFile f(m_listFileName);
     if (!f.open(QIODevice::WriteOnly))
     {
         QString message = i18n("Could not open file %1.  Try a different filename?", f.fileName());
-        if (KMessageBox::warningYesNo(0, message, i18n("Could Not Open File"), KGuiItem(i18n("Try Different")),
+        if (KMessageBox::warningYesNo(nullptr, message, i18n("Could Not Open File"), KGuiItem(i18n("Try Different")),
                                       KGuiItem(i18n("Do Not Try"))) == KMessageBox::Yes)
         {
             m_listFileName.clear();
             slotSaveSessionAs(nativeSave);
         }
         return;
     }
     QTextStream ostream(&f);
     OAL::Log log;
     ostream << log.writeLog(nativeSave);
     f.close();
     isModified = false; //We've saved the session, so reset the modified flag.
 }
 
 void ObservingList::slotWizard()
 {
     QPointer<ObsListWizard> wizard = new ObsListWizard(KStars::Instance());
     if (wizard->exec() == QDialog::Accepted)
     {
         QPointer<QProgressDialog> addingObjectsProgress = new QProgressDialog();
         addingObjectsProgress->setWindowTitle(i18n("Observing List Wizard"));
         addingObjectsProgress->setLabelText(i18n("Please wait while adding objects..."));
         addingObjectsProgress->setMaximum(wizard->obsList().size());
         addingObjectsProgress->setMinimum(0);
         addingObjectsProgress->setValue(0);
         addingObjectsProgress->show();
         int counter = 1;
         foreach (SkyObject *o, wizard->obsList())
         {
             slotAddObject(o);
             addingObjectsProgress->setValue(counter++);
             if (addingObjectsProgress->wasCanceled())
                 break;
             qApp->processEvents();
         }
         delete addingObjectsProgress;
     }
 
     delete wizard;
 }
 
 void ObservingList::plot(SkyObject *o)
 {
     if (!o)
         return;
     float DayOffset = 0;
     if (TimeHash.value(o->name(), o->transitTime(dt, geo)).hour() > 12)
         DayOffset = 1;
 
     QDateTime midnight = QDateTime(dt.date(), QTime());
     KStarsDateTime ut  = geo->LTtoUT(KStarsDateTime(midnight));
     double h1          = geo->GSTtoLST(ut.gst()).Hours();
     if (h1 > 12.0)
         h1 -= 24.0;
 
     ui->avt->setSecondaryLimits(h1, h1 + 24.0, -90.0, 90.0);
     ksal->setLocation(geo);
     ksal->setDate(&ut);
     ui->avt->setGeoLocation(geo);
     ui->avt->setSunRiseSetTimes(ksal->getSunRise(), ksal->getSunSet());
     ui->avt->setDawnDuskTimes(ksal->getDawnAstronomicalTwilight(), ksal->getDuskAstronomicalTwilight());
     ui->avt->setMinMaxSunAlt(ksal->getSunMinAlt(), ksal->getSunMaxAlt());
     ui->avt->setMoonRiseSetTimes(ksal->getMoonRise(), ksal->getMoonSet());
     ui->avt->setMoonIllum(ksal->getMoonIllum());
     ui->avt->update();
     KPlotObject *po = new KPlotObject(Qt::white, KPlotObject::Lines, 2.0);
     for (double h = -12.0; h <= 12.0; h += 0.5)
     {
         po->addPoint(h, findAltitude(o, (h + DayOffset * 24.0)));
     }
     ui->avt->removeAllPlotObjects();
     ui->avt->addPlotObject(po);
 }
 
 double ObservingList::findAltitude(SkyPoint *p, double hour)
 {
     // Jasem 2015-09-05 Using correct procedure to find altitude
     SkyPoint sp                   = *p; // make a copy
     QDateTime midnight            = QDateTime(dt.date(), QTime());
     KStarsDateTime ut             = geo->LTtoUT(KStarsDateTime(midnight));
     KStarsDateTime targetDateTime = ut.addSecs(hour * 3600.0);
     dms LST                       = geo->GSTtoLST(targetDateTime.gst());
     sp.EquatorialToHorizontal(&LST, geo->lat());
     return sp.alt().Degrees();
 }
 
 void ObservingList::slotChangeTab(int index)
 {
     noSelection = true;
     saveCurrentUserLog();
     ui->NotesEdit->setEnabled(false);
     ui->TimeEdit->setEnabled(false);
     ui->SetTime->setEnabled(false);
     ui->SearchImage->setEnabled(false);
     ui->DeleteImage->setEnabled(false);
-    m_CurrentObject = 0;
+    m_CurrentObject = nullptr;
     sessionView     = index != 0;
     setSaveImagesButton();
     ui->WizardButton->setEnabled(!sessionView); //wizard adds only to the Wish List
     ui->OALExport->setEnabled(sessionView);
     //Clear the selection in the Tables
     ui->WishListView->clearSelection();
     ui->SessionView->clearSelection();
     //Clear the user log text box.
     saveCurrentUserLog();
     ui->NotesEdit->setPlainText("");
     ui->avt->removeAllPlotObjects();
 }
 
 void ObservingList::slotLocation()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
     if (ld->exec() == QDialog::Accepted)
     {
         geo = ld->selectedCity();
         ui->SetLocation->setText(geo->fullName());
     }
     delete ld;
 }
 
 void ObservingList::slotUpdate()
 {
     dt.setDate(ui->DateEdit->date());
     ui->avt->removeAllPlotObjects();
     //Creating a copy of the lists, we can't use the original lists as they'll keep getting modified as the loop iterates
     QList<QSharedPointer<SkyObject>> _obsList = m_WishList, _SessionList = m_SessionList;
 
     for (QSharedPointer<SkyObject> &o : _obsList)
     {
         if (o->name() != "star")
         {
             slotRemoveObject(o.data(), false, true);
             slotAddObject(o.data(), false, true);
         }
     }
     for (QSharedPointer<SkyObject> &obj : _SessionList)
     {
         if (obj->name() != "star")
         {
             slotRemoveObject(obj.data(), true, true);
             slotAddObject(obj.data(), true, true);
         }
     }
 }
 
 void ObservingList::slotSetTime()
 {
     SkyObject *o = currentObject();
     slotRemoveObject(o, true);
     TimeHash[o->name()] = ui->TimeEdit->time();
     slotAddObject(o, true, true);
 }
 
 void ObservingList::slotCustomDSS()
 {
     ui->SearchImage->setEnabled(false);
     //ui->ImagePreview->clearPreview();
     ui->ImagePreview->setPixmap(QPixmap());
 
     KSDssImage::Metadata md;
     bool ok = true;
 
     int width  = QInputDialog::getInt(this, i18n("Customized DSS Download"), i18n("Specify image width (arcminutes): "),
                                      15, 15, 75, 1, &ok);
     int height = QInputDialog::getInt(this, i18n("Customized DSS Download"),
                                       i18n("Specify image height (arcminutes): "), 15, 15, 75, 1, &ok);
     QStringList strList = (QStringList() << "poss2ukstu_blue"
                                          << "poss2ukstu_red"
                                          << "poss2ukstu_ir"
                                          << "poss1_blue"
                                          << "poss1_red"
                                          << "quickv"
                                          << "all");
     QString version =
         QInputDialog::getItem(this, i18n("Customized DSS Download"), i18n("Specify version: "), strList, 0, false, &ok);
 
     QUrl srcUrl(KSDssDownloader::getDSSURL(currentObject()->ra0(), currentObject()->dec0(), width, height, "gif",
                                            version, &md));
 
     delete m_dl;
     m_dl = new KSDssDownloader();
     connect(m_dl, SIGNAL(downloadComplete(bool)), SLOT(downloadReady(bool)));
     m_dl->startSingleDownload(srcUrl, getCurrentImagePath(), md);
 }
 
 void ObservingList::slotGetImage(bool _dss, const SkyObject *o)
 {
     dss = _dss;
     Q_ASSERT(
         !o ||
         o == currentObject()); // FIXME: Meaningless to operate on m_currentImageFileName unless o == currentObject()!
     if (!o)
         o = currentObject();
     ui->SearchImage->setEnabled(false);
     //ui->ImagePreview->clearPreview();
     //ui->ImagePreview->setPixmap(QPixmap());
     setCurrentImage(o);
     QString currentImagePath = getCurrentImagePath();
     if (QFile::exists(currentImagePath))
         QFile::remove(currentImagePath);
     //QUrl url;
     dss = true;
     qWarning() << "FIXME: Removed support for SDSS. Until reintroduction, we will supply a DSS image";
     std::function<void(bool)> slot = std::bind(&ObservingList::downloadReady, this, std::placeholders::_1);
     new KSDssDownloader(o, currentImagePath, slot, this);
 }
 
 void ObservingList::downloadReady(bool success)
 {
     // set downloadJob to 0, but don't delete it - the job will be deleted automatically
     //    downloadJob = 0;
 
     delete m_dl;
-    m_dl = 0; // required if we came from slotCustomDSS; does nothing otherwise
+    m_dl = nullptr; // required if we came from slotCustomDSS; does nothing otherwise
 
     if (!success)
     {
-        KMessageBox::sorry(0, i18n("Failed to download DSS/SDSS image!"));
+        KMessageBox::sorry(nullptr, i18n("Failed to download DSS/SDSS image!"));
     }
     else
     {
         /*
           if( QFile( KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + QDir::separator() + m_currentImageFileName ).size() > 13000)
           //The default image is around 8689 bytes
         */
         //ui->ImagePreview->showPreview( QUrl::fromLocalFile( getCurrentImagePath() ) );
         ui->ImagePreview->setPixmap(QPixmap(getCurrentImagePath()).scaledToHeight(ui->ImagePreview->width()));
         saveThumbImage();
         ui->ImagePreview->show();
         ui->ImagePreview->setCursor(Qt::PointingHandCursor);
         ui->DeleteImage->setEnabled(true);
     }
     /*
     // FIXME: Implement a priority order SDSS > DSS in the DSS downloader
     else if( ! dss )
         slotGetImage( true );
     */
 }
 
 void ObservingList::setCurrentImage(const SkyObject *o)
 {
     QString sanitizedName = o->name().remove(' ').remove('\'').remove('\"').toLower();
 
     // JM: Always use .png across all platforms. No JPGs at all?
     m_currentImageFileName = "image-" + sanitizedName + ".png";
 
     m_currentThumbImageFileName = "thumb-" + sanitizedName + ".png";
 
     // Does full image exists in the path?
     QString currentImagePath = KSPaths::locate(QStandardPaths::GenericDataLocation, m_currentImageFileName);
 
     // Let's try to fallback to thumb-* images if they exist
     if (currentImagePath.isEmpty())
     {
         currentImagePath = KSPaths::locate(QStandardPaths::GenericDataLocation, m_currentThumbImageFileName);
 
         // If thumb image exists, let's use it
         if (currentImagePath.isEmpty() == false)
             m_currentImageFileName = m_currentThumbImageFileName;
     }
 
     // 2017-04-14: Unnamed stars already unsupported in observing list
     /*
     if( o->name() == "star" )
     {
         QString RAString( o->ra0().toHMSString() );
         QString DecString( o->dec0().toDMSString() );
         m_currentImageFileName = "Image_J" + RAString.remove(' ').remove( ':' ) + DecString.remove(' ').remove( ':' ); // Note: Changed naming convention to standard 2016-08-25 asimha; old images shall have to be re-downloaded.
         // Unnecessary complication below:
         // QChar decsgn = ( (o->dec0().Degrees() < 0.0 ) ? '-' : '+' );
         // m_currentImageFileName = m_currentImageFileName.remove('+').remove('-') + decsgn;
     }
     */
 
     // 2017-04-14 JM: If we use .png always, let us use it across all platforms.
     /*
     QString imagePath = getCurrentImagePath();
     if ( QFile::exists( imagePath))   // New convention -- append filename extension so file is usable on Windows etc.
     {
         QFile::rename( imagePath, imagePath + ".png" );
     }
     m_currentImageFileName += ".png";
     */
 }
 
 QString ObservingList::getCurrentImagePath()
 {
     QString currentImagePath = KSPaths::locate(QStandardPaths::GenericDataLocation, m_currentImageFileName);
     if (QFile::exists(currentImagePath))
     {
         return currentImagePath;
     }
     else
         return (KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + m_currentImageFileName);
 }
 
 void ObservingList::slotSaveAllImages()
 {
     ui->SearchImage->setEnabled(false);
     ui->DeleteImage->setEnabled(false);
-    m_CurrentObject = 0;
+    m_CurrentObject = nullptr;
     //Clear the selection in the Tables
     ui->WishListView->clearSelection();
     ui->SessionView->clearSelection();
 
     foreach (QSharedPointer<SkyObject> o, getActiveList())
     {
         if (!o)
             continue; // FIXME: Why would we have null objects? But appears that we do.
         setCurrentImage(o.data());
         QString img(getCurrentImagePath());
         //        QUrl url( ( Options::obsListPreferDSS() ) ? DSSUrl : SDSSUrl ); // FIXME: We have removed SDSS support!
         QUrl url(KSDssDownloader::getDSSURL(o.data()));
         if (!o->isSolarSystem()) //TODO find a way for adding support for solar system images
             saveImage(url, img, o.data());
     }
 }
 
 void ObservingList::saveImage(QUrl /*url*/, QString /*filename*/, const SkyObject *o)
 {
     if (!o)
         o = currentObject();
     Q_ASSERT(o);
     if (!QFile::exists(getCurrentImagePath()))
     {
         // Call the DSS downloader
         slotGetImage(true, o);
     }
 }
 
 void ObservingList::slotImageViewer()
 {
     QPointer<ImageViewer> iv;
     QString currentImagePath = getCurrentImagePath();
     if (QFile::exists(currentImagePath))
     {
         QUrl url = QUrl::fromLocalFile(currentImagePath);
         iv       = new ImageViewer(url);
     }
 
     if (iv)
         iv->show();
 }
 
 void ObservingList::slotDeleteAllImages()
 {
-    if (KMessageBox::warningYesNo(0, i18n("This will delete all saved images. Are you sure you want to do this?"),
+    if (KMessageBox::warningYesNo(nullptr, i18n("This will delete all saved images. Are you sure you want to do this?"),
                                   i18n("Delete All Images")) == KMessageBox::No)
         return;
     ui->ImagePreview->setCursor(Qt::ArrowCursor);
     ui->SearchImage->setEnabled(false);
     ui->DeleteImage->setEnabled(false);
-    m_CurrentObject = 0;
+    m_CurrentObject = nullptr;
     //Clear the selection in the Tables
     ui->WishListView->clearSelection();
     ui->SessionView->clearSelection();
     //ui->ImagePreview->clearPreview();
     ui->ImagePreview->setPixmap(QPixmap());
     QDirIterator iterator(KSPaths::writableLocation(QStandardPaths::GenericDataLocation));
     while (iterator.hasNext())
     {
         // TODO: Probably, there should be a different directory for cached images in the observing list.
         if (iterator.fileName().contains("Image") && (!iterator.fileName().contains("dat")) &&
             (!iterator.fileName().contains("obslist")))
         {
             QFile file(iterator.filePath());
             file.remove();
         }
         iterator.next();
     }
 }
 
 void ObservingList::setSaveImagesButton()
 {
     ui->saveImages->setEnabled(!getActiveList().isEmpty());
 }
 
 // FIXME: Is there a reason to implement these as an event filter,
 // instead of as a signal-slot connection? Shouldn't we just use slots
 // to subscribe to various events from the Table / Session view?
 //
 // NOTE: ui->ImagePreview is a QLabel, which has no clicked() event or
 // public mouseReleaseEvent(), so eventFilter makes sense.
 bool ObservingList::eventFilter(QObject *obj, QEvent *event)
 {
     if (obj == ui->ImagePreview)
     {
         if (event->type() == QEvent::MouseButtonRelease)
         {
             if (currentObject())
             {
                 if (!QFile::exists(getCurrentImagePath()))
                 {
                     if (!currentObject()->isSolarSystem())
                         slotGetImage(Options::obsListPreferDSS());
                     else
                         slotSearchImage();
                 }
                 else
                     slotImageViewer();
             }
             return true;
         }
     }
     if (obj == ui->WishListView->viewport() || obj == ui->SessionView->viewport())
     {
         bool sessionViewEvent = (obj == ui->SessionView->viewport());
 
         if (event->type() == QEvent::MouseButtonRelease) // Mouse button release event
         {
             QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
             QPoint pos(mouseEvent->globalX(), mouseEvent->globalY());
 
             if (mouseEvent->button() == Qt::RightButton)
             {
                 if (!noSelection)
                 {
                     pmenu->initPopupMenu(sessionViewEvent, !singleSelection, showScope);
                     pmenu->popup(pos);
                 }
                 return true;
             }
         }
     }
 
     if (obj == ui->WishListView || obj == ui->SessionView)
     {
         if (event->type() == QEvent::KeyPress)
         {
             QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
             if (keyEvent->key() == Qt::Key_Delete)
             {
                 slotRemoveSelectedObjects();
                 return true;
             }
         }
     }
 
     return false;
 }
 
 void ObservingList::slotSearchImage()
 {
     QPixmap *pm                  = new QPixmap(":/images/noimage.png");
     QPointer<ThumbnailPicker> tp = new ThumbnailPicker(currentObject(), *pm, this, 200, 200, i18n("Image Chooser"));
     if (tp->exec() == QDialog::Accepted)
     {
         QString currentImagePath = getCurrentImagePath();
         QFile f(currentImagePath);
 
         //If a real image was set, save it.
         if (tp->imageFound())
         {
             tp->image()->save(f.fileName(), "PNG");
             //ui->ImagePreview->showPreview( QUrl::fromLocalFile( f.fileName() ) );
             ui->ImagePreview->setPixmap(QPixmap(f.fileName()).scaledToHeight(ui->ImagePreview->width()));
             saveThumbImage();
             slotNewSelection();
         }
     }
     delete pm;
     delete tp;
 }
 
 void ObservingList::slotDeleteCurrentImage()
 {
     QFile::remove(getCurrentImagePath());
     ImagePreviewHash.remove(m_CurrentObject);
     slotNewSelection();
 }
 
 void ObservingList::saveThumbImage()
 {
     if (!QFile::exists(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + m_currentThumbImageFileName))
     {
         QImage img(getCurrentImagePath());
         img = img.scaled(200, 200, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
         img.save(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + m_currentThumbImageFileName);
     }
 }
 
 QString ObservingList::getTime(const SkyObject *o) const
 {
     return TimeHash.value(o->name(), QTime(30, 0, 0)).toString("h:mm:ss AP");
 }
 
 QTime ObservingList::scheduledTime(SkyObject *o) const
 {
     return TimeHash.value(o->name(), o->transitTime(dt, geo));
 }
 
 void ObservingList::setTime(const SkyObject *o, QTime t)
 {
     TimeHash.insert(o->name(), t);
 }
 
 void ObservingList::slotOALExport()
 {
     slotSaveSessionAs(false);
 }
 
 void ObservingList::slotAddVisibleObj()
 {
     KStarsDateTime lt = dt;
     lt.setTime(QTime(8, 0, 0));
     QPointer<WUTDialog> w = new WUTDialog(KStars::Instance(), sessionView, geo, lt);
     w->init();
     QModelIndexList selectedItems;
     selectedItems =
         m_WishListSortModel->mapSelectionToSource(ui->WishListView->selectionModel()->selection()).indexes();
     if (selectedItems.size())
     {
         foreach (const QModelIndex &i, selectedItems)
         {
             foreach (QSharedPointer<SkyObject> o, obsList())
                 if (getObjectName(o.data()) == i.data().toString() && w->checkVisibility(o.data()))
                     slotAddObject(
                         o.data(),
                         true); // FIXME: Better if there is a QSharedPointer override for this, although the check will ensure that we don't duplicate.
         }
     }
     delete w;
 }
 
 SkyObject *ObservingList::findObjectByName(QString name)
 {
     foreach (QSharedPointer<SkyObject> o, sessionList())
     {
         if (getObjectName(o.data(), false) == name)
             return o.data();
     }
     return nullptr;
 }
 
 void ObservingList::selectObject(const SkyObject *o)
 {
     ui->tabWidget->setCurrentIndex(1);
     ui->SessionView->selectionModel()->clear();
     for (int irow = m_SessionModel->rowCount() - 1; irow >= 0; --irow)
     {
         QModelIndex mSortIndex = m_SessionSortModel->index(irow, 0);
         QModelIndex mIndex     = m_SessionSortModel->mapToSource(mSortIndex);
         int idxrow             = mIndex.row();
         if (m_SessionModel->item(idxrow, 0)->text() == getObjectName(o))
             ui->SessionView->selectRow(idxrow);
         slotNewSelection();
     }
 }
 
 void ObservingList::setDefaultImage()
 {
     ui->ImagePreview->setPixmap(m_NoImagePixmap);
     ui->ImagePreview->update();
 }
 
 QString ObservingList::getObjectName(const SkyObject *o, bool translated)
 {
     QString finalObjectName;
     if (o->name() == "star")
     {
         StarObject *s = (StarObject *)o;
 
         // JM: Enable HD Index stars to be added to the observing list.
         if (s->getHDIndex() != 0)
             finalObjectName = QString("HD %1").arg(QString::number(s->getHDIndex()));
     }
     else
         finalObjectName = translated ? o->translatedName() : o->name();
 
     return finalObjectName;
 }
 
 void ObservingList::slotUpdateAltitudes()
 {
     // FIXME: Update upon gaining visibility, do not update when not visible
     KStarsDateTime now = KStarsDateTime::currentDateTimeUtc();
     //    qCDebug(KSTARS) << "Updating altitudes in observation planner @ JD - J2000 = " << double( now.djd() - J2000 );
     for (int irow = m_WishListModel->rowCount() - 1; irow >= 0; --irow)
     {
         QModelIndex idx = m_WishListSortModel->mapToSource(m_WishListSortModel->index(irow, 0));
         SkyObject *o    = static_cast<SkyObject *>(idx.data(Qt::UserRole + 1).value<void *>());
         Q_ASSERT(o);
         SkyPoint p = o->recomputeHorizontalCoords(now, geo);
         idx =
             m_WishListSortModel->mapToSource(m_WishListSortModel->index(irow, m_WishListSortModel->columnCount() - 1));
         QStandardItem *replacement = m_altCostHelper(p);
         m_WishListModel->setData(idx, replacement->data(Qt::DisplayRole), Qt::DisplayRole);
         m_WishListModel->setData(idx, replacement->data(Qt::UserRole), Qt::UserRole);
         delete replacement;
     }
     emit m_WishListModel->dataChanged(
         m_WishListModel->index(0, m_WishListModel->columnCount() - 1),
         m_WishListModel->index(m_WishListModel->rowCount() - 1, m_WishListModel->columnCount() - 1));
 }
 
 QSharedPointer<SkyObject> ObservingList::findObject(const SkyObject *o, bool session)
 {
     const QList<QSharedPointer<SkyObject>> &list = (session ? sessionList() : obsList());
     const QString &target                        = getObjectName(o);
     foreach (QSharedPointer<SkyObject> obj, list)
     {
         if (getObjectName(obj.data()) == target)
             return obj;
     }
     return QSharedPointer<SkyObject>(); // null pointer
 }
diff --git a/kstars/tools/observinglist.h b/kstars/tools/observinglist.h
index 4e634b2ae..87f30ef0d 100644
--- a/kstars/tools/observinglist.h
+++ b/kstars/tools/observinglist.h
@@ -1,428 +1,428 @@
 /***************************************************************************
                           observinglist.h  -  K Desktop Planetarium
                              -------------------
     begin                : 29 Nov 2004
     copyright            : (C) 2004 by Jeff Woods, Jason Harris
     email                : jcwoods@bellsouth.net, jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #pragma once
 
 #include "kstarsdatetime.h"
 #include "ui_observinglist.h"
 
 #include <QAbstractTableModel>
 #include <QDialog>
 #include <QFrame>
 #include <QList>
 #include <QPixmap>
 #include <QTime>
 
 #include <functional>
 #include <memory>
 
 class QSortFilterProxyModel;
 class QStandardItem;
 class QStandardItemModel;
 class QTimer;
 
 class GeoLocation;
 class KSAlmanac;
 class KSDssDownloader;
 class KStars;
 class KStarsDateTime;
 class ObsListPopupMenu;
 class SkyObject;
 class SkyPoint;
 
 class ObservingListUI : public QFrame, public Ui::ObservingList
 {
     Q_OBJECT
 
   public:
     /** @short Cunstructor
             */
     explicit ObservingListUI(QWidget *parent);
 };
 
 /** @class ObservingList
     *Tool window for managing a custom list of objects.  The window
     *displays the Name, RA, Dec, mag, and type of each object in the list.
     *
     *By selecting an object in the list, you can perform a number of functions
     *on that object:
     *+ Center it in the display
     *+ Examine its Details Window
     *+ Point the telescope at it
     *+ Attach a custom icon or name label (TBD)
     *+ Attach a trail (solar system only) (TBD)
     *+ Open the AltVsTime tool
     *
     *The user can also save/load their observing lists, and can export
     *list data (TBD: as HTML table?  CSV format?  plain text?)
     *
     *The observing notes associated with the selected object are displayed
     *below the list.
     *
     *TODO:
     *+ Implement a "shaded" state, in which the UI is compressed to
     *  make it easier to float on the KStars window.  Displays only
     *  object names, and single-letter action buttons, and no user log.
     *+ Implement an InfoBox version (the ultimate shaded state)
     *
     *@short Tool for managing a custom list of objects
     *@author Jeff Woods, Jason Harris
     *@version 1.0
     */
 
 class ObservingList : public QDialog
 {
     Q_OBJECT
 
   public:
     /** @short Constructor
             */
     ObservingList();
     /** @short Destuctor (empty)
             */
     ~ObservingList() override;
 
     /** @return reference to the current observing list
             */
     QList<QSharedPointer<SkyObject>> &obsList() { return m_WishList; }
 
     /** @return reference to the current observing list
             */
     QList<QSharedPointer<SkyObject>> &sessionList() { return m_SessionList; }
 
     /** @return pointer to the currently-selected object in the observing list
             *@note if more than one object is selected, this function returns 0.
             */
     inline SkyObject *currentObject() const { return m_CurrentObject; }
 
     /** @short If the current list has unsaved changes, ask the user about saving it.
             *@note also clears the list in preparation of opening a new one
             */
     void saveCurrentList();
 
     /** @short Plot the SkyObject's Altitude vs Time in the AVTPlotWidget.
            *@p o pointer to the object to be plotted
            */
     void plot(SkyObject *o);
 
     /** @short Return the altitude of the given SkyObject for the given hour.
             *@p p pointer to the SkyObject
             *@p hour time at which altitude has to be found
             */
     double findAltitude(SkyPoint *p, double hour = 0);
 
     /** @short Sets the image parameters for the current object
             *@p o The passed object for setting the parameters
             */
     void setCurrentImage(const SkyObject *o);
 
     /**
          * @short Returns a path to the current image, or a writable image.
          */
     QString getCurrentImagePath();
 
     /** @short Save the user log text to a file.
             *@note the log is attached to the current object in obsList.
             */
     void saveCurrentUserLog();
 
     /** @short decides on whether to enable the SaveImages button or not
             */
     void setSaveImagesButton();
 
     /** @short This is the declaration of the event filter function
          * which is installed on the KImageFilePreview and the TabeView
          */
     bool eventFilter(QObject *obj, QEvent *event) override;
 
     /** @short saves a thumbnail image for the details dialog
          * from the downloaded image
          */
     void saveThumbImage();
 
     QString getTime(const SkyObject *o) const;
 
     QTime scheduledTime(SkyObject *o) const;
 
     void setTime(const SkyObject *o, QTime t);
 
     inline GeoLocation *geoLocation() { return geo; }
 
     inline KStarsDateTime dateTime() const { return dt; }
 
     /** @short return the object with the name as the passed
          * QString from the Session List, return null otherwise
          */
     SkyObject *findObjectByName(QString name);
 
     /** @short make a selection in the session view
          */
     void selectObject(const SkyObject *o);
 
     /** @short set the default image in the image preview.
          */
     void setDefaultImage();
 
     /** @short get object name. If star has no name, generate a name based on catalog number.
          * @param translated set to true if the translated name is required.
          */
     QString getObjectName(const SkyObject *o, bool translated = true);
 
     /**
          * @return true if the selected list contains the given object
          */
     inline bool contains(const SkyObject *o, bool session = false) { return bool(findObject(o, session)); }
 
     QSharedPointer<SkyObject> findObject(const SkyObject *o, bool session = false);
 
   public slots:
     /** @short add a new object to list
             *@p o pointer to the object to add to the list
             *@p session flag toggle adding the object to the session list
             *@p update flag to toggle the call of slotSaveList
             */
     void slotAddObject(const SkyObject *o = nullptr, bool session = false, bool update = false);
 
     /** @short Remove skyobjects which are highlighted in the
             *observing list tool from the observing list.
             */
     void slotRemoveSelectedObjects();
 
     /** @short Remove skyobject from the observing list.
             *@p o pointer to the SkyObject to be removed.
             *@p session flag to tell it whether to remove the object
             *from the sessionlist or from the wishlist
             *@p update flag to toggle the call of slotSaveList
             *Use SkyMap::clickedObject() if o is nullptr (default)
             */
     void slotRemoveObject(const SkyObject *o = nullptr, bool session = false, bool update = false);
 
     /** @short center the selected object in the display
             */
     void slotCenterObject();
 
     /** @short slew the telescope to the selected object
             */
     void slotSlewToObject();
 
     /**
          * @brief slotAddToEkosScheduler Add object to Ekos scheduler
          */
     void slotAddToEkosScheduler();
 
     /** @short Show the details window for the selected object
             */
     void slotDetails();
 
     /** @short Show the Altitude vs Time for selecteld objects
             */
     void slotAVT();
 
     /** @short Open the WUT dialog
         */
     void slotWUT();
 
     /** @short Add the object to the Session List
             */
     void slotAddToSession();
 
     /** @short Open the Find Dialog
             */
     void slotFind();
 
     /** @short Tasks needed when changing the selected object
             *Save the user log of the previous selected object,
             *find the new selected object in the obsList, and
             *show the notes associated with the new selected object
             */
     void slotNewSelection();
 
     /** @short load an observing list from disk.
             */
     void slotOpenList();
 
     /** @short save the current observing list to disk.
             */
     void slotSaveList();
 
     /** @short Load the Wish list from disk.
             */
     void slotLoadWishList();
 
     /** @short save the current observing session plan to disk, specify filename.
             */
     void slotSaveSessionAs(bool nativeSave = true);
 
     /** @short save the current session
             */
     void slotSaveSession(bool nativeSave = true);
 
     /** @short construct a new observing list using the wizard.
             */
     void slotWizard();
 
     /** @short toggle the setEnabled flags according to current view
             *set the m_currentItem to nullptr and clear selections
             *@p index captures the integer value sent by the signal
             *which is the currentIndex of the table
             */
     void slotChangeTab(int index);
 
     /** @short Opens the Location dialog to set the GeoLocation
             *for the sessionlist.
             */
     void slotLocation();
 
     /** @short Updates the tableviews for the new geolocation and date
             */
     void slotUpdate();
 
     /** @short Takes the time from the QTimeEdit box and sets it as the
             *time parameter in the tableview of the SessionList.
             */
     void slotSetTime();
 
     /** @short Downloads the corresponding DSS or SDSS image from the web and
             *displays it
             */
-    void slotGetImage(bool _dss = false, const SkyObject *o = 0);
+    void slotGetImage(bool _dss = false, const SkyObject *o = nullptr);
 
     void slotSearchImage();
 
     /** @short Downloads the images of all the objects in the session list
             *Note: This downloads the SDSS image, checks if the size is > default image
             *and gets the DSS image if thats the case
             */
     void slotSaveAllImages();
 
     /** @short saves the image syncronously from a given URL into a given file
             *@p url the url from which the image has to be downloaded
             *@p filename the file onto which the url has to be copied to
             *NOTE: This is not a generic image saver, it is specific to the current object
             */
-    void saveImage(QUrl url, QString filename, const SkyObject *o = 0);
+    void saveImage(QUrl url, QString filename, const SkyObject *o = nullptr);
 
     /** @short Shows the image in a ImageViewer window.
             */
     void slotImageViewer();
 
     /** @short Remove the current image
             */
     void slotDeleteCurrentImage();
 
     /** @short Removes all the save DSS/SDSS images from the disk.
             */
     void slotDeleteAllImages();
 
     /** @short download the DSS image and show it
             */
     void slotDSS() { slotGetImage(true); }
 
     /**
          *@short Present the user with options to get the right DSS image for the job
          */
     void slotCustomDSS();
 
     /** @short Export a target list to the oal compliant format
             */
     void slotOALExport();
 
     void slotAddVisibleObj();
 
     /**
          * @short Show the eyepiece field view
          */
     void slotEyepieceView();
 
     /**
          * @short Recalculate and update the values of the altitude in the wishlist for the current time
          */
     void slotUpdateAltitudes();
 
     /**
          * @brief slotClearList Remove all objects from current list
          */
     void slotClearList();
 
   protected slots:
     void slotClose();
     void downloadReady(bool success);
 
   protected:
     void showEvent(QShowEvent *) override;
 
   private:
     /**
          * @short Return the active list
          * @return The session list or the wish list depending on which tab is currently being viewed.
          */
     inline QList<QSharedPointer<SkyObject>> &getActiveList() { return ((sessionView) ? m_SessionList : m_WishList); }
 
     /**
          * @short Return the active itemmodel
          * @return the session model or the wishlist model depending on which tab is currently being viewed.
          */
     inline QStandardItemModel *getActiveModel() const { return (sessionView ? m_SessionModel.get() : m_WishListModel.get()); }
 
     /**
          * @short Return the active sort model
          * @return the session sort model or the wishlist sort model depending on which tab is currently being viewed.
          */
     inline QSortFilterProxyModel *getActiveSortModel() const
     {
         return (sessionView ? m_SessionSortModel.get() : m_WishListSortModel.get());
     }
 
     /**
          * @short Return the active view
          * @return the active view in the UI -- session view or wishlist view depending on which one is active.
          */
     inline QTableView *getActiveView() const { return ((sessionView) ? (ui->SessionView) : (ui->WishListView)); }
 
     /**
          * @short Get the currently selected item indexes
          * @return a QModelIndexList containing the selected rows in the active QTableView
          */
     inline QModelIndexList getSelectedItems() const { return getActiveView()->selectionModel()->selectedRows(); }
 
     std::unique_ptr<KSAlmanac> ksal;
     ObservingListUI *ui { nullptr };
     QList<QSharedPointer<SkyObject>> m_WishList, m_SessionList;
     SkyObject *LogObject { nullptr };
     SkyObject *m_CurrentObject { nullptr };
     bool isModified { false };
     bool sessionView { false };
     bool dss { false };
     bool singleSelection { false };
     bool showScope { false };
     bool noSelection { false };
     QString m_listFileName, m_currentImageFileName, m_currentThumbImageFileName;
     KStarsDateTime dt;
     GeoLocation *geo { nullptr };
     std::unique_ptr<QStandardItemModel> m_WishListModel;
     std::unique_ptr<QStandardItemModel> m_SessionModel;
     std::unique_ptr<QSortFilterProxyModel> m_WishListSortModel;
     std::unique_ptr<QSortFilterProxyModel> m_SessionSortModel;
     QHash<QString, QTime> TimeHash;
     std::unique_ptr<ObsListPopupMenu> pmenu;
     KSDssDownloader *m_dl { nullptr };
     QHash<SkyObject *, QPixmap> ImagePreviewHash;
     QPixmap m_NoImagePixmap;
     QTimer *m_altitudeUpdater { nullptr };
     std::function<QStandardItem *(const SkyPoint &)> m_altCostHelper;
     bool m_initialWishlistLoad { false };
 };
diff --git a/kstars/tools/obslistpopupmenu.cpp b/kstars/tools/obslistpopupmenu.cpp
index ffe902920..d199d61ca 100644
--- a/kstars/tools/obslistpopupmenu.cpp
+++ b/kstars/tools/obslistpopupmenu.cpp
@@ -1,95 +1,95 @@
 /***************************************************************************
                           obslistpopupmenu.h  -  K Desktop Planetarium
                              -------------------
     begin                : Sun July 5 2009
     copyright            : (C) 2008 by Prakash Mohan
     email                : prakash.mohan@kdemail.net
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "obslistpopupmenu.h"
 
 #include "config-kstars.h"
 
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "observinglist.h"
 
-ObsListPopupMenu::ObsListPopupMenu() : QMenu(0)
+ObsListPopupMenu::ObsListPopupMenu() : QMenu(nullptr)
 {
 }
 
 ObsListPopupMenu::~ObsListPopupMenu()
 {
 }
 
 void ObsListPopupMenu::initPopupMenu(bool sessionView, bool multiSelection, bool showScope)
 {
     KStarsData *ksdata = KStarsData::Instance();
 
     clear();
 
     //Insert item for adding the object to the session view
     if (!sessionView)
     {
         addAction(i18n("Add to session plan"), ksdata->observingList(), SLOT(slotAddToSession()));
         addAction(i18n("Add objects visible tonight to session plan"), ksdata->observingList(),
                   SLOT(slotAddVisibleObj()));
 #ifdef HAVE_INDI
         addAction(i18n("Add to Ekos Scheduler"), ksdata->observingList(), SLOT(slotAddToEkosScheduler()));
 #endif
     }
 
     addSeparator();
 
     if (!multiSelection)
         addAction(i18n("Center"), ksdata->observingList(),
                   SLOT(slotCenterObject())); //Insert item for centering on object
 
     if (!multiSelection && showScope) // Insert item for slewing telescope
         addAction(i18nc("Show the selected object in the telescope", "Scope"), ksdata->observingList(),
                   SLOT(slotSlewToObject()));
 
     addSeparator();
 
     if (!multiSelection)
     {
         addAction(i18nc("Show Detailed Information Dialog", "Details"), ksdata->observingList(),
                   SLOT(slotDetails())); // Insert item for showing details dialog
         addAction(i18n("Eyepiece view"), ksdata->observingList(),
                   SLOT(slotEyepieceView())); // Insert item for showing eyepiece view
     }
 
     //Insert item for opening the Altitude vs time dialog
     addAction(i18n("Altitude vs. Time"), ksdata->observingList(), SLOT(slotAVT()));
 
     addSeparator();
 
     //Insert item for dowloading different images
     if (!multiSelection)
     {
         if (ksdata->observingList()->currentObject() != nullptr &&
             !ksdata->observingList()->currentObject()->isSolarSystem())
         {
             addAction(i18n("Show SDSS image"), ksdata->observingList(), SLOT(slotGetImage()));
             addAction(i18n("Show DSS image"), ksdata->observingList(), SLOT(slotDSS()));
             addAction(i18n("Customized DSS download"), ksdata->observingList(), SLOT(slotCustomDSS()));
         }
         addAction(i18n("Show images from web "), ksdata->observingList(), SLOT(slotSearchImage()));
         addSeparator();
     }
 
     //Insert item for Removing the object(s)
     if (!sessionView)
         addAction(i18n("Remove from WishList"), ksdata->observingList(), SLOT(slotRemoveSelectedObjects()));
     else
         addAction(i18n("Remove from Session Plan"), ksdata->observingList(), SLOT(slotRemoveSelectedObjects()));
 }
diff --git a/kstars/tools/planetviewer.cpp b/kstars/tools/planetviewer.cpp
index b428637f9..084549130 100644
--- a/kstars/tools/planetviewer.cpp
+++ b/kstars/tools/planetviewer.cpp
@@ -1,286 +1,286 @@
 /***************************************************************************
                           planetviewer.cpp  -  Display overhead view of the solar system
                              -------------------
     begin                : Sun May 25 2003
     copyright            : (C) 2003 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "planetviewer.h"
 
 #include "ksfilereader.h"
 #include "ksnumbers.h"
 #include "kstarsdata.h"
 #include "ksutils.h"
 #include "skyobjects/ksplanet.h"
 #include "skyobjects/ksplanetbase.h"
 #include "widgets/timespinbox.h"
 
 #include <KLocalizedString>
 #include <KPlotting/KPlotAxis>
 #include <KPlotting/KPlotObject>
 #include <KPlotting/KPlotPoint>
 #include <KPlotting/KPlotWidget>
 
 #include <QFile>
 #include <QKeyEvent>
 #include <QVBoxLayout>
 
 #include <cmath>
 
 PlanetViewerUI::PlanetViewerUI(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 PlanetViewer::PlanetViewer(QWidget *parent) : QDialog(parent), scale(1.0), isClockRunning(false), tmr(this)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     KStarsData *data = KStarsData::Instance();
     pw               = new PlanetViewerUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
 
     mainLayout->addWidget(pw);
     setLayout(mainLayout);
 
     setWindowTitle(i18n("Solar System Viewer"));
     //setMainWidget( pw );
     //setButtons( QDialog::Close );
     setModal(false);
 
     pw->map->setLimits(-48.0, 48.0, -48.0, 48.0);
     pw->map->axis(KPlotWidget::BottomAxis)
         ->setLabel(i18nc("axis label for x-coordinate of solar system viewer.  AU means astronomical unit.",
                          "X-position (AU)"));
     pw->map->axis(KPlotWidget::LeftAxis)
         ->setLabel(i18nc("axis label for y-coordinate of solar system viewer.  AU means astronomical unit.",
                          "Y-position (AU)"));
 
     pw->TimeStep->setDaysOnly(true);
     pw->TimeStep->tsbox()->setValue(1); //start with 1-day timestep
 
     pw->RunButton->setIcon(QIcon::fromTheme("arrow-right", QIcon(":/icons/breeze/default/arrow-right.svg")));
     pw->ZoomInButton->setIcon(QIcon::fromTheme("zoom-in", QIcon(":/icons/breeze/default/zoom-in.svg")));
     pw->ZoomOutButton->setIcon(QIcon::fromTheme("zoom-out", QIcon(":/icons/breeze/default/zoom-out.svg")));
     pw->DateBox->setDate(data->lt().date());
 
     resize(500, 500);
     pw->map->QWidget::setFocus(); //give keyboard focus to the plot widget for key and mouse events
 
     setCenterPlanet(QString());
 
     PlanetList.append(KSPlanetBase::createPlanet(KSPlanetBase::MERCURY));
     PlanetList.append(KSPlanetBase::createPlanet(KSPlanetBase::VENUS));
     PlanetList.append(new KSPlanet("Earth"));
     PlanetList.append(KSPlanetBase::createPlanet(KSPlanetBase::MARS));
     PlanetList.append(KSPlanetBase::createPlanet(KSPlanetBase::JUPITER));
     PlanetList.append(KSPlanetBase::createPlanet(KSPlanetBase::SATURN));
     PlanetList.append(KSPlanetBase::createPlanet(KSPlanetBase::URANUS));
     PlanetList.append(KSPlanetBase::createPlanet(KSPlanetBase::NEPTUNE));
     //PlanetList.append( KSPlanetBase::createPlanet( KSPlanetBase::PLUTO ) );
 
     ut = data->ut();
     KSNumbers num(ut.djd());
 
     for (int i = 0; i < PlanetList.count(); ++i)
     {
-        PlanetList[i]->findPosition(&num, 0, 0); // nullptr args: don't need geocent. coords.
+        PlanetList[i]->findPosition(&num, nullptr, nullptr); // nullptr args: don't need geocent. coords.
         LastUpdate[i] = int(ut.date().toJulianDay());
     }
 
     //The planets' update intervals are 0.25% of one period:
     UpdateInterval[0] = 0;
     UpdateInterval[1] = 0;
     UpdateInterval[2] = 0;
     UpdateInterval[3] = 1;
     UpdateInterval[4] = 5;
     UpdateInterval[5] = 13;
     UpdateInterval[6] = 38;
     UpdateInterval[7] = 75;
     //UpdateInterval[8] = 113;
 
     QTimer::singleShot(0, this, SLOT(initPlotObjects()));
 
     connect(&tmr, SIGNAL(timeout()), SLOT(tick()));
     connect(pw->TimeStep, SIGNAL(scaleChanged(float)), SLOT(setTimeScale(float)));
     connect(pw->RunButton, SIGNAL(clicked()), SLOT(slotRunClock()));
     connect(pw->ZoomInButton, SIGNAL(clicked()), pw->map, SLOT(slotZoomIn()));
     connect(pw->ZoomOutButton, SIGNAL(clicked()), pw->map, SLOT(slotZoomOut()));
     connect(pw->DateBox, SIGNAL(dateChanged(QDate)), SLOT(slotChangeDate()));
     connect(pw->TodayButton, SIGNAL(clicked()), SLOT(slotToday()));
     connect(this, SIGNAL(closeClicked()), SLOT(slotCloseWindow()));
 }
 
 QString PlanetViewer::planetName(uint i) const
 {
     return PlanetList[i]->name();
 }
 
 void PlanetViewer::tick()
 {
     //Update the time/date
     ut.setDJD(ut.djd() + scale * 0.1);
     pw->DateBox->setDate(ut.date());
 
     updatePlanets();
 }
 
 void PlanetViewer::setTimeScale(float f)
 {
     scale = f / 86400.; //convert seconds to days
 }
 
 void PlanetViewer::slotRunClock()
 {
     isClockRunning = !isClockRunning;
 
     if (isClockRunning)
     {
         pw->RunButton->setIcon(
             QIcon::fromTheme("media-playback-pause", QIcon(":/icons/breeze/default/media-playback-pause.svg")));
         tmr.start(100);
         //		pw->DateBox->setEnabled( false );
     }
     else
     {
         pw->RunButton->setIcon(QIcon::fromTheme("arrow-right", QIcon(":/icons/breeze/default/arrow-right.svg")));
         tmr.stop();
         //		pw->DateBox->setEnabled( true );
     }
 }
 
 void PlanetViewer::slotChangeDate()
 {
     ut.setDate(pw->DateBox->date());
     updatePlanets();
 }
 
 void PlanetViewer::slotCloseWindow()
 {
     //Stop the clock if it's running
     if (isClockRunning)
     {
         tmr.stop();
         isClockRunning = false;
         pw->RunButton->setIcon(QIcon::fromTheme("arrow-right", QIcon(":/icons/breeze/default/arrow-right.svg")));
     }
 }
 
 void PlanetViewer::updatePlanets()
 {
     KSNumbers num(ut.djd());
     bool changed(false);
 
     //Check each planet to see if it needs to be updated
     for (int i = 0; i < PlanetList.count(); ++i)
     {
         if (abs(int(ut.date().toJulianDay()) - LastUpdate[i]) > UpdateInterval[i])
         {
             KSPlanetBase *p = PlanetList[i];
             p->findPosition(&num);
 
             double s, c, s2, c2;
             p->helEcLong().SinCos(s, c);
             p->helEcLat().SinCos(s2, c2);
             QList<KPlotPoint *> points = planet[i]->points();
             points.at(0)->setX(p->rsun() * c * c2);
             points.at(0)->setY(p->rsun() * s * c2);
 
             if (centerPlanet() == p->name())
             {
                 QRectF dataRect = pw->map->dataRect();
                 double xc       = (dataRect.right() + dataRect.left()) * 0.5;
                 double yc       = (dataRect.bottom() + dataRect.top()) * 0.5;
                 double dx       = points.at(0)->x() - xc;
                 double dy       = points.at(0)->y() - yc;
                 pw->map->setLimits(dataRect.x() + dx, dataRect.right() + dx, dataRect.y() + dy, dataRect.bottom() + dy);
             }
 
             LastUpdate[i] = int(ut.date().toJulianDay());
             changed       = true;
         }
     }
 
     if (changed)
         pw->map->update();
 }
 
 void PlanetViewer::slotToday()
 {
     pw->DateBox->setDate(KStarsData::Instance()->lt().date());
 }
 
 void PlanetViewer::paintEvent(QPaintEvent *)
 {
     pw->map->update();
 }
 
 void PlanetViewer::initPlotObjects()
 {
     // Planets
     ksun = new KPlotObject(Qt::yellow, KPlotObject::Points, 12, KPlotObject::Circle);
     ksun->addPoint(0.0, 0.0);
     pw->map->addPlotObject(ksun);
 
     //Read in the orbit curves
     for (int i = 0; i < PlanetList.count(); ++i)
     {
         KSPlanetBase *p    = PlanetList[i];
         KPlotObject *orbit = new KPlotObject(Qt::white, KPlotObject::Lines, 1.0);
 
         QFile orbitFile;
         QString orbitFileName =
             (p->isMajorPlanet() ? ((KSPlanet *)p)->untranslatedName().toLower() : p->name().toLower()) + ".orbit";
         if (KSUtils::openDataFile(orbitFile, orbitFileName))
         {
             KSFileReader fileReader(orbitFile); // close file is included
             double x, y;
             while (fileReader.hasMoreLines())
             {
                 QString line       = fileReader.readLine();
                 QStringList fields = line.split(' ', QString::SkipEmptyParts);
                 if (fields.size() == 3)
                 {
                     x = fields[0].toDouble();
                     y = fields[1].toDouble();
                     orbit->addPoint(x, y);
                 }
             }
         }
 
         pw->map->addPlotObject(orbit);
     }
 
     for (int i = 0; i < PlanetList.count(); ++i)
     {
         KSPlanetBase *p = PlanetList[i];
         planet[i]       = new KPlotObject(p->color(), KPlotObject::Points, 6, KPlotObject::Circle);
 
         double s, c;
         p->helEcLong().SinCos(s, c);
 
         planet[i]->addPoint(p->rsun() * c, p->rsun() * s, p->translatedName());
         pw->map->addPlotObject(planet[i]);
     }
 
     update();
 }
 
 void PlanetViewer::keyPressEvent(QKeyEvent *e)
 {
     if (e->key() == Qt::Key_Escape)
         close();
     else
         e->ignore();
 }
diff --git a/kstars/tools/scriptbuilder.cpp b/kstars/tools/scriptbuilder.cpp
index 214545c26..dc73c3c50 100644
--- a/kstars/tools/scriptbuilder.cpp
+++ b/kstars/tools/scriptbuilder.cpp
@@ -1,2877 +1,2877 @@
 /***************************************************************************
                           scriptbuilder.cpp  -  description
                              -------------------
     begin                : Thu Apr 17 2003
     copyright            : (C) 2003 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "scriptbuilder.h"
 
 #include "kspaths.h"
 #include "scriptfunction.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 #include "skymap.h"
 #include "kstarsdatetime.h"
 #include "dialogs/finddialog.h"
 #include "dialogs/locationdialog.h"
 #include "widgets/dmsbox.h"
 #include "widgets/timespinbox.h"
 #include "widgets/timestepbox.h"
 
 #include <KLocalizedString>
 #include <KMessageBox>
 #include <KIO/StoredTransferJob>
 #include <KIO/CopyJob>
 #include <KJob>
 
 #include <QApplication>
 #include <QFontMetrics>
 #include <QTreeWidget>
 #include <QTextStream>
 #include <QFileDialog>
 #include <QStandardPaths>
 #include <QDebug>
 
 #include <sys/stat.h>
 
 OptionsTreeViewWidget::OptionsTreeViewWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
 }
 
 OptionsTreeView::OptionsTreeView(QWidget *p) : QDialog(p)
 {
     otvw.reset(new OptionsTreeViewWidget(this));
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
 
     mainLayout->addWidget(otvw.get());
     setLayout(mainLayout);
 
     setWindowTitle(i18n("Options"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     setModal(false);
 }
 
 OptionsTreeView::~OptionsTreeView()
 {
 }
 
 void OptionsTreeView::resizeColumns()
 {
     //Size each column to the maximum width of items in that column
     int maxwidth[3]  = { 0, 0, 0 };
     QFontMetrics qfm = optionsList()->fontMetrics();
 
     for (int i = 0; i < optionsList()->topLevelItemCount(); ++i)
     {
         QTreeWidgetItem *topitem = optionsList()->topLevelItem(i);
         topitem->setExpanded(true);
 
         for (int j = 0; j < topitem->childCount(); ++j)
         {
             QTreeWidgetItem *child = topitem->child(j);
 
             for (int icol = 0; icol < 3; ++icol)
             {
                 child->setExpanded(true);
 
                 int w = qfm.width(child->text(icol)) + 4;
                 if (icol == 0)
                 {
                     w += 2 * optionsList()->indentation();
                 }
 
                 if (w > maxwidth[icol])
                 {
                     maxwidth[icol] = w;
                 }
             }
         }
     }
 
     for (int icol = 0; icol < 3; ++icol)
     {
         //DEBUG
         qDebug() << QString("max width of column %1: %2").arg(icol).arg(maxwidth[icol]) << endl;
 
         optionsList()->setColumnWidth(icol, maxwidth[icol]);
     }
 }
 
 ScriptNameWidget::ScriptNameWidget(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 ScriptNameDialog::ScriptNameDialog(QWidget *p) : QDialog(p)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     snw = new ScriptNameWidget(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
 
     mainLayout->addWidget(snw);
     setLayout(mainLayout);
 
     setWindowTitle(i18n("Script Data"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     okB = buttonBox->button(QDialogButtonBox::Ok);
 
     connect(snw->ScriptName, SIGNAL(textChanged(QString)), this, SLOT(slotEnableOkButton()));
 }
 
 ScriptNameDialog::~ScriptNameDialog()
 {
     delete snw;
 }
 
 void ScriptNameDialog::slotEnableOkButton()
 {
     okB->setEnabled(!snw->ScriptName->text().isEmpty());
 }
 
 ScriptBuilderUI::ScriptBuilderUI(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 ScriptBuilder::ScriptBuilder(QWidget *parent)
     : QDialog(parent), UnsavedChanges(false), checkForChanges(true), currentFileURL(), currentDir(QDir::homePath()),
       currentScriptName(), currentAuthor()
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     ks = (KStars *)parent;
     sb = new ScriptBuilderUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
 
     mainLayout->addWidget(sb);
     setLayout(mainLayout);
 
     setWindowTitle(i18n("Script Builder"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(slotClose()));
 
     sb->FuncDoc->setTextInteractionFlags(Qt::NoTextInteraction);
 
     //Initialize function templates and descriptions
     KStarsFunctionList.append(new ScriptFunction("lookTowards",
                                                  i18n("Point the display at the specified location. %1 can be the name "
                                                       "of an object, a cardinal point on the compass, or 'zenith'.",
                                                       QString("dir")),
                                                  false, "QString", "dir"));
     KStarsFunctionList.append(new ScriptFunction(
         "addLabel", i18n("Add a name label to the object named %1.", QString("name")), false, "QString", "name"));
     KStarsFunctionList.append(
         new ScriptFunction("removeLabel", i18n("Remove the name label from the object named %1.", QString("name")),
                            false, "QString", "name"));
     KStarsFunctionList.append(new ScriptFunction(
         "addTrail", i18n("Add a trail to the solar system body named %1.", QString("name")), false, "QString", "name"));
     KStarsFunctionList.append(new ScriptFunction(
         "removeTrail", i18n("Remove the trail from the solar system body named %1.", QString("name")), false, "QString",
         "name"));
     KStarsFunctionList.append(new ScriptFunction("setRaDec",
                                                  i18n("Point the display at the specified RA/Dec coordinates.  RA is "
                                                       "expressed in Hours; Dec is expressed in Degrees."),
                                                  false, "double", "ra", "double", "dec"));
     KStarsFunctionList.append(new ScriptFunction(
         "setAltAz",
         i18n("Point the display at the specified Alt/Az coordinates.  Alt and Az are expressed in Degrees."), false,
         "double", "alt", "double", "az"));
     KStarsFunctionList.append(new ScriptFunction("zoomIn", i18n("Increase the display Zoom Level."), false));
     KStarsFunctionList.append(new ScriptFunction("zoomOut", i18n("Decrease the display Zoom Level."), false));
     KStarsFunctionList.append(
         new ScriptFunction("defaultZoom", i18n("Set the display Zoom Level to its default value."), false));
     KStarsFunctionList.append(
         new ScriptFunction("zoom", i18n("Set the display Zoom Level manually."), false, "double", "z"));
     KStarsFunctionList.append(
         new ScriptFunction("setLocalTime", i18n("Set the system clock to the specified Local Time."), false, "int",
                            "year", "int", "month", "int", "day", "int", "hour", "int", "minute", "int", "second"));
     KStarsFunctionList.append(new ScriptFunction(
         "waitFor", i18n("Pause script execution for specified number of seconds."), false, "double", "sec"));
     KStarsFunctionList.append(new ScriptFunction("waitForKey",
                                                  i18n("Halt script execution until the specified key is pressed.  Only "
                                                       "single-key strokes are possible; use 'space' for the spacebar."),
                                                  false, "QString", "key"));
     KStarsFunctionList.append(new ScriptFunction(
         "setTracking", i18n("Set whether the display is tracking the current location."), false, "bool", "track"));
     KStarsFunctionList.append(new ScriptFunction(
         "changeViewOption", i18n("Change view option named %1 to value %2.", QString("opName"), QString("opValue")),
         false, "QString", "opName", "QString", "opValue"));
     KStarsFunctionList.append(new ScriptFunction(
         "setGeoLocation", i18n("Set the geographic location to the city specified by city, province and country."),
         false, "QString", "cityName", "QString", "provinceName", "QString", "countryName"));
     KStarsFunctionList.append(new ScriptFunction(
         "setColor", i18n("Set the color named %1 to the value %2.", QString("colorName"), QString("value")), false,
         "QString", "colorName", "QString", "value"));
     KStarsFunctionList.append(new ScriptFunction("loadColorScheme", i18n("Load the color scheme specified by name."),
                                                  false, "QString", "name"));
     KStarsFunctionList.append(
         new ScriptFunction("exportImage", i18n("Export the sky image to the file, with specified width and height."),
                            false, "QString", "fileName", "int", "width", "int", "height"));
     KStarsFunctionList.append(
         new ScriptFunction("printImage",
                            i18n("Print the sky image to a printer or file.  If %1 is true, it will show the print "
                                 "dialog.  If %2 is true, it will use the Star Chart color scheme for printing.",
                                 QString("usePrintDialog"), QString("useChartColors")),
                            false, "bool", "usePrintDialog", "bool", "useChartColors"));
     SimClockFunctionList.append(new ScriptFunction("stop", i18n("Halt the simulation clock."), true));
     SimClockFunctionList.append(new ScriptFunction("start", i18n("Start the simulation clock."), true));
     SimClockFunctionList.append(new ScriptFunction("setClockScale",
                                                    i18n("Set the timescale of the simulation clock to specified scale. "
                                                         " 1.0 means real-time; 2.0 means twice real-time; etc."),
                                                    true, "double", "scale"));
 
     // JM: We're using QTreeWdiget for Qt4 now
     QTreeWidgetItem *kstars_tree   = new QTreeWidgetItem(sb->FunctionTree, QStringList("KStars"));
     QTreeWidgetItem *simclock_tree = new QTreeWidgetItem(sb->FunctionTree, QStringList("SimClock"));
 
     for (int i = 0; i < KStarsFunctionList.size(); ++i)
         new QTreeWidgetItem(kstars_tree, QStringList(KStarsFunctionList[i]->prototype()));
 
     for (int i = 0; i < SimClockFunctionList.size(); ++i)
         new QTreeWidgetItem(simclock_tree, QStringList(SimClockFunctionList[i]->prototype()));
 
     kstars_tree->sortChildren(0, Qt::AscendingOrder);
     simclock_tree->sortChildren(0, Qt::AscendingOrder);
 
     sb->FunctionTree->setColumnCount(1);
     sb->FunctionTree->setHeaderLabels(QStringList(i18n("Functions")));
     sb->FunctionTree->setSortingEnabled(false);
 
     //Add icons to Push Buttons
     sb->NewButton->setIcon(QIcon::fromTheme("document-new", QIcon(":/icons/breeze/default/document-new.svg")));
     sb->OpenButton->setIcon(QIcon::fromTheme("document-open", QIcon(":/icons/breeze/default/document-open.svg")));
     sb->SaveButton->setIcon(QIcon::fromTheme("document-save", QIcon(":/icons/breeze/default/document-save.svg")));
     sb->SaveAsButton->setIcon(
         QIcon::fromTheme("document-save-as", QIcon(":/icons/breeze/default/document-save-as.svg")));
     sb->RunButton->setIcon(QIcon::fromTheme("system-run", QIcon(":/icons/breeze/default/system-run.svg")));
     sb->CopyButton->setIcon(QIcon::fromTheme("view-refresh", QIcon(":/icons/breeze/default/view-refresh.svg")));
     sb->AddButton->setIcon(QIcon::fromTheme("go-previous", QIcon(":/icons/breeze/default/go-previous.svg")));
     sb->RemoveButton->setIcon(QIcon::fromTheme("go-next", QIcon(":/icons/breeze/default/go-next.svg")));
     sb->UpButton->setIcon(QIcon::fromTheme("go-up", QIcon(":/icons/breeze/default/go-up.svg")));
     sb->DownButton->setIcon(QIcon::fromTheme("go-down", QIcon(":/icons/breeze/default/go-down.svg")));
 
     sb->NewButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->OpenButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->SaveButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->SaveAsButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->RunButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->CopyButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->AddButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->RemoveButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->UpButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     sb->DownButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
 
     //Prepare the widget stack
     argBlank            = new QWidget();
     argLookToward       = new ArgLookToward(sb->ArgStack);
     argFindObject       = new ArgFindObject(sb->ArgStack); //shared by Add/RemoveLabel and Add/RemoveTrail
     argSetRaDec         = new ArgSetRaDec(sb->ArgStack);
     argSetAltAz         = new ArgSetAltAz(sb->ArgStack);
     argSetLocalTime     = new ArgSetLocalTime(sb->ArgStack);
     argWaitFor          = new ArgWaitFor(sb->ArgStack);
     argWaitForKey       = new ArgWaitForKey(sb->ArgStack);
     argSetTracking      = new ArgSetTrack(sb->ArgStack);
     argChangeViewOption = new ArgChangeViewOption(sb->ArgStack);
     argSetGeoLocation   = new ArgSetGeoLocation(sb->ArgStack);
     argTimeScale        = new ArgTimeScale(sb->ArgStack);
     argZoom             = new ArgZoom(sb->ArgStack);
     argExportImage      = new ArgExportImage(sb->ArgStack);
     argPrintImage       = new ArgPrintImage(sb->ArgStack);
     argSetColor         = new ArgSetColor(sb->ArgStack);
     argLoadColorScheme  = new ArgLoadColorScheme(sb->ArgStack);
 
     sb->ArgStack->addWidget(argBlank);
     sb->ArgStack->addWidget(argLookToward);
     sb->ArgStack->addWidget(argFindObject);
     sb->ArgStack->addWidget(argSetRaDec);
     sb->ArgStack->addWidget(argSetAltAz);
     sb->ArgStack->addWidget(argSetLocalTime);
     sb->ArgStack->addWidget(argWaitFor);
     sb->ArgStack->addWidget(argWaitForKey);
     sb->ArgStack->addWidget(argSetTracking);
     sb->ArgStack->addWidget(argChangeViewOption);
     sb->ArgStack->addWidget(argSetGeoLocation);
     sb->ArgStack->addWidget(argTimeScale);
     sb->ArgStack->addWidget(argZoom);
     sb->ArgStack->addWidget(argExportImage);
     sb->ArgStack->addWidget(argPrintImage);
     sb->ArgStack->addWidget(argSetColor);
     sb->ArgStack->addWidget(argLoadColorScheme);
 
     sb->ArgStack->setCurrentIndex(0);
 
     snd = new ScriptNameDialog(ks);
     otv = new OptionsTreeView(ks);
 
     otv->resize(sb->width(), 0.5 * sb->height());
 
     initViewOptions();
     otv->resizeColumns();
 
     //connect widgets in ScriptBuilderUI
     connect(sb->FunctionTree, SIGNAL(itemDoubleClicked(QTreeWidgetItem*,int)), this, SLOT(slotAddFunction()));
     connect(sb->FunctionTree, SIGNAL(itemClicked(QTreeWidgetItem*,int)), this, SLOT(slotShowDoc()));
     connect(sb->UpButton, SIGNAL(clicked()), this, SLOT(slotMoveFunctionUp()));
     connect(sb->ScriptListBox, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(slotArgWidget()));
     connect(sb->DownButton, SIGNAL(clicked()), this, SLOT(slotMoveFunctionDown()));
     connect(sb->CopyButton, SIGNAL(clicked()), this, SLOT(slotCopyFunction()));
     connect(sb->RemoveButton, SIGNAL(clicked()), this, SLOT(slotRemoveFunction()));
     connect(sb->NewButton, SIGNAL(clicked()), this, SLOT(slotNew()));
     connect(sb->OpenButton, SIGNAL(clicked()), this, SLOT(slotOpen()));
     connect(sb->SaveButton, SIGNAL(clicked()), this, SLOT(slotSave()));
     connect(sb->SaveAsButton, SIGNAL(clicked()), this, SLOT(slotSaveAs()));
     connect(sb->AddButton, SIGNAL(clicked()), this, SLOT(slotAddFunction()));
     connect(sb->RunButton, SIGNAL(clicked()), this, SLOT(slotRunScript()));
 
     //Connections for Arg Widgets
     connect(argSetGeoLocation->FindCityButton, SIGNAL(clicked()), this, SLOT(slotFindCity()));
     connect(argLookToward->FindButton, SIGNAL(clicked()), this, SLOT(slotFindObject()));
     connect(argChangeViewOption->TreeButton, SIGNAL(clicked()), this, SLOT(slotShowOptions()));
     connect(argFindObject->FindButton, SIGNAL(clicked()), this, SLOT(slotFindObject()));
 
     connect(argLookToward->FocusEdit, SIGNAL(editTextChanged(QString)), this, SLOT(slotLookToward()));
     connect(argFindObject->NameEdit, SIGNAL(textChanged(QString)), this, SLOT(slotArgFindObject()));
     connect(argSetRaDec->RABox, SIGNAL(textChanged(QString)), this, SLOT(slotRa()));
     connect(argSetRaDec->DecBox, SIGNAL(textChanged(QString)), this, SLOT(slotDec()));
     connect(argSetAltAz->AltBox, SIGNAL(textChanged(QString)), this, SLOT(slotAlt()));
     connect(argSetAltAz->AzBox, SIGNAL(textChanged(QString)), this, SLOT(slotAz()));
     connect(argSetLocalTime->DateWidget, SIGNAL(dateChanged(QDate)), this, SLOT(slotChangeDate()));
     connect(argSetLocalTime->TimeBox, SIGNAL(timeChanged(QTime)), this, SLOT(slotChangeTime()));
     connect(argWaitFor->DelayBox, SIGNAL(valueChanged(int)), this, SLOT(slotWaitFor()));
     connect(argWaitForKey->WaitKeyEdit, SIGNAL(textChanged(QString)), this, SLOT(slotWaitForKey()));
     connect(argSetTracking->CheckTrack, SIGNAL(stateChanged(int)), this, SLOT(slotTracking()));
     connect(argChangeViewOption->OptionName, SIGNAL(activated(QString)), this, SLOT(slotViewOption()));
     connect(argChangeViewOption->OptionValue, SIGNAL(textChanged(QString)), this, SLOT(slotViewOption()));
     connect(argSetGeoLocation->CityName, SIGNAL(textChanged(QString)), this, SLOT(slotChangeCity()));
     connect(argSetGeoLocation->ProvinceName, SIGNAL(textChanged(QString)), this, SLOT(slotChangeProvince()));
     connect(argSetGeoLocation->CountryName, SIGNAL(textChanged(QString)), this, SLOT(slotChangeCountry()));
     connect(argTimeScale->TimeScale, SIGNAL(scaleChanged(float)), this, SLOT(slotTimeScale()));
     connect(argZoom->ZoomBox, SIGNAL(textChanged(QString)), this, SLOT(slotZoom()));
     connect(argExportImage->ExportFileName, SIGNAL(textChanged(QString)), this, SLOT(slotExportImage()));
     connect(argExportImage->ExportWidth, SIGNAL(valueChanged(int)), this, SLOT(slotExportImage()));
     connect(argExportImage->ExportHeight, SIGNAL(valueChanged(int)), this, SLOT(slotExportImage()));
     connect(argPrintImage->UsePrintDialog, SIGNAL(toggled(bool)), this, SLOT(slotPrintImage()));
     connect(argPrintImage->UseChartColors, SIGNAL(toggled(bool)), this, SLOT(slotPrintImage()));
     connect(argSetColor->ColorName, SIGNAL(activated(QString)), this, SLOT(slotChangeColorName()));
     connect(argSetColor->ColorValue, SIGNAL(changed(QColor)), this, SLOT(slotChangeColor()));
     connect(argLoadColorScheme->SchemeList, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(slotLoadColorScheme()));
 
     //disable some buttons
     sb->CopyButton->setEnabled(false);
     sb->AddButton->setEnabled(false);
     sb->RemoveButton->setEnabled(false);
     sb->UpButton->setEnabled(false);
     sb->DownButton->setEnabled(false);
     sb->SaveButton->setEnabled(false);
     sb->SaveAsButton->setEnabled(false);
     sb->RunButton->setEnabled(false);
 }
 
 ScriptBuilder::~ScriptBuilder()
 {
     while (!KStarsFunctionList.isEmpty())
         delete KStarsFunctionList.takeFirst();
 
     while (!SimClockFunctionList.isEmpty())
         delete SimClockFunctionList.takeFirst();
 
     while (!ScriptList.isEmpty())
         delete ScriptList.takeFirst();
 }
 
 void ScriptBuilder::initViewOptions()
 {
     otv->optionsList()->setRootIsDecorated(true);
     QStringList fields;
 
     //InfoBoxes
     opsGUI = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("InfoBoxes")));
     fields << "ShowInfoBoxes" << i18n("Toggle display of all InfoBoxes") << i18n("bool");
     new QTreeWidgetItem(opsGUI, fields);
     fields.clear();
     fields << "ShowTimeBox" << i18n("Toggle display of Time InfoBox") << i18n("bool");
     new QTreeWidgetItem(opsGUI, fields);
     fields.clear();
     fields << "ShowGeoBox" << i18n("Toggle display of Geographic InfoBox") << i18n("bool");
     new QTreeWidgetItem(opsGUI, fields);
     fields.clear();
     fields << "ShowFocusBox" << i18n("Toggle display of Focus InfoBox") << i18n("bool");
     new QTreeWidgetItem(opsGUI, fields);
     fields.clear();
     fields << "ShadeTimeBox" << i18n("(un)Shade Time InfoBox") << i18n("bool");
     new QTreeWidgetItem(opsGUI, fields);
     fields.clear();
     fields << "ShadeGeoBox" << i18n("(un)Shade Geographic InfoBox") << i18n("bool");
     new QTreeWidgetItem(opsGUI, fields);
     fields.clear();
     fields << "ShadeFocusBox" << i18n("(un)Shade Focus InfoBox") << i18n("bool");
     new QTreeWidgetItem(opsGUI, fields);
     fields.clear();
 
     argChangeViewOption->OptionName->addItem("ShowInfoBoxes");
     argChangeViewOption->OptionName->addItem("ShowTimeBox");
     argChangeViewOption->OptionName->addItem("ShowGeoBox");
     argChangeViewOption->OptionName->addItem("ShowFocusBox");
     argChangeViewOption->OptionName->addItem("ShadeTimeBox");
     argChangeViewOption->OptionName->addItem("ShadeGeoBox");
     argChangeViewOption->OptionName->addItem("ShadeFocusBox");
 
     //Toolbars
     opsToolbar = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("Toolbars")));
     fields << "ShowMainToolBar" << i18n("Toggle display of main toolbar") << i18n("bool");
     new QTreeWidgetItem(opsToolbar, fields);
     fields.clear();
     fields << "ShowViewToolBar" << i18n("Toggle display of view toolbar") << i18n("bool");
     new QTreeWidgetItem(opsToolbar, fields);
     fields.clear();
 
     argChangeViewOption->OptionName->addItem("ShowMainToolBar");
     argChangeViewOption->OptionName->addItem("ShowViewToolBar");
 
     //Show Objects
     opsShowObj = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("Show Objects")));
     fields << "ShowStars" << i18n("Toggle display of Stars") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowDeepSky" << i18n("Toggle display of all deep-sky objects") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowMessier" << i18n("Toggle display of Messier object symbols") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowMessierImages" << i18n("Toggle display of Messier object images") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowNGC" << i18n("Toggle display of NGC objects") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowIC" << i18n("Toggle display of IC objects") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowSolarSystem" << i18n("Toggle display of all solar system bodies") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowSun" << i18n("Toggle display of Sun") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowMoon" << i18n("Toggle display of Moon") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowMercury" << i18n("Toggle display of Mercury") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowVenus" << i18n("Toggle display of Venus") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowMars" << i18n("Toggle display of Mars") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowJupiter" << i18n("Toggle display of Jupiter") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowSaturn" << i18n("Toggle display of Saturn") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowUranus" << i18n("Toggle display of Uranus") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowNeptune" << i18n("Toggle display of Neptune") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     //fields.clear();
     //fields << "ShowPluto" << i18n( "Toggle display of Pluto" ) << i18n( "bool" );
     //new QTreeWidgetItem( opsShowObj, fields );
     fields.clear();
     fields << "ShowAsteroids" << i18n("Toggle display of Asteroids") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
     fields << "ShowComets" << i18n("Toggle display of Comets") << i18n("bool");
     new QTreeWidgetItem(opsShowObj, fields);
     fields.clear();
 
     argChangeViewOption->OptionName->addItem("ShowStars");
     argChangeViewOption->OptionName->addItem("ShowDeepSky");
     argChangeViewOption->OptionName->addItem("ShowMessier");
     argChangeViewOption->OptionName->addItem("ShowMessierImages");
     argChangeViewOption->OptionName->addItem("ShowNGC");
     argChangeViewOption->OptionName->addItem("ShowIC");
     argChangeViewOption->OptionName->addItem("ShowSolarSystem");
     argChangeViewOption->OptionName->addItem("ShowSun");
     argChangeViewOption->OptionName->addItem("ShowMoon");
     argChangeViewOption->OptionName->addItem("ShowMercury");
     argChangeViewOption->OptionName->addItem("ShowVenus");
     argChangeViewOption->OptionName->addItem("ShowMars");
     argChangeViewOption->OptionName->addItem("ShowJupiter");
     argChangeViewOption->OptionName->addItem("ShowSaturn");
     argChangeViewOption->OptionName->addItem("ShowUranus");
     argChangeViewOption->OptionName->addItem("ShowNeptune");
     //argChangeViewOption->OptionName->addItem( "ShowPluto" );
     argChangeViewOption->OptionName->addItem("ShowAsteroids");
     argChangeViewOption->OptionName->addItem("ShowComets");
 
     opsShowOther = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("Show Other")));
     fields << "ShowCLines" << i18n("Toggle display of constellation lines") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowCBounds" << i18n("Toggle display of constellation boundaries") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowCNames" << i18n("Toggle display of constellation names") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowMilkyWay" << i18n("Toggle display of Milky Way") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowGrid" << i18n("Toggle display of the coordinate grid") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowEquator" << i18n("Toggle display of the celestial equator") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowEcliptic" << i18n("Toggle display of the ecliptic") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowHorizon" << i18n("Toggle display of the horizon line") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowGround" << i18n("Toggle display of the opaque ground") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowStarNames" << i18n("Toggle display of star name labels") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowStarMagnitudes" << i18n("Toggle display of star magnitude labels") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowAsteroidNames" << i18n("Toggle display of asteroid name labels") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowCometNames" << i18n("Toggle display of comet name labels") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowPlanetNames" << i18n("Toggle display of planet name labels") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
     fields << "ShowPlanetImages" << i18n("Toggle display of planet images") << i18n("bool");
     new QTreeWidgetItem(opsShowOther, fields);
     fields.clear();
 
     argChangeViewOption->OptionName->addItem("ShowCLines");
     argChangeViewOption->OptionName->addItem("ShowCBounds");
     argChangeViewOption->OptionName->addItem("ShowCNames");
     argChangeViewOption->OptionName->addItem("ShowMilkyWay");
     argChangeViewOption->OptionName->addItem("ShowGrid");
     argChangeViewOption->OptionName->addItem("ShowEquator");
     argChangeViewOption->OptionName->addItem("ShowEcliptic");
     argChangeViewOption->OptionName->addItem("ShowHorizon");
     argChangeViewOption->OptionName->addItem("ShowGround");
     argChangeViewOption->OptionName->addItem("ShowStarNames");
     argChangeViewOption->OptionName->addItem("ShowStarMagnitudes");
     argChangeViewOption->OptionName->addItem("ShowAsteroidNames");
     argChangeViewOption->OptionName->addItem("ShowCometNames");
     argChangeViewOption->OptionName->addItem("ShowPlanetNames");
     argChangeViewOption->OptionName->addItem("ShowPlanetImages");
 
     opsCName = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("Constellation Names")));
     fields << "UseLatinConstellNames" << i18n("Show Latin constellation names") << i18n("bool");
     new QTreeWidgetItem(opsCName, fields);
     fields.clear();
     fields << "UseLocalConstellNames" << i18n("Show constellation names in local language") << i18n("bool");
     new QTreeWidgetItem(opsCName, fields);
     fields.clear();
     fields << "UseAbbrevConstellNames" << i18n("Show IAU-standard constellation abbreviations") << i18n("bool");
     new QTreeWidgetItem(opsCName, fields);
     fields.clear();
 
     argChangeViewOption->OptionName->addItem("UseLatinConstellNames");
     argChangeViewOption->OptionName->addItem("UseLocalConstellNames");
     argChangeViewOption->OptionName->addItem("UseAbbrevConstellNames");
 
     opsHide = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("Hide Items")));
     fields << "HideOnSlew" << i18n("Toggle whether objects hidden while slewing display") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "SlewTimeScale" << i18n("Timestep threshold (in seconds) for hiding objects") << i18n("double");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideStars" << i18n("Hide faint stars while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HidePlanets" << i18n("Hide solar system bodies while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideMessier" << i18n("Hide Messier objects while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideNGC" << i18n("Hide NGC objects while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideIC" << i18n("Hide IC objects while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideMilkyWay" << i18n("Hide Milky Way while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideCNames" << i18n("Hide constellation names while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideCLines" << i18n("Hide constellation lines while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideCBounds" << i18n("Hide constellation boundaries while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
     fields << "HideGrid" << i18n("Hide coordinate grid while slewing?") << i18n("bool");
     new QTreeWidgetItem(opsHide, fields);
     fields.clear();
 
     argChangeViewOption->OptionName->addItem("HideOnSlew");
     argChangeViewOption->OptionName->addItem("SlewTimeScale");
     argChangeViewOption->OptionName->addItem("HideStars");
     argChangeViewOption->OptionName->addItem("HidePlanets");
     argChangeViewOption->OptionName->addItem("HideMessier");
     argChangeViewOption->OptionName->addItem("HideNGC");
     argChangeViewOption->OptionName->addItem("HideIC");
     argChangeViewOption->OptionName->addItem("HideMilkyWay");
     argChangeViewOption->OptionName->addItem("HideCNames");
     argChangeViewOption->OptionName->addItem("HideCLines");
     argChangeViewOption->OptionName->addItem("HideCBounds");
     argChangeViewOption->OptionName->addItem("HideGrid");
 
     opsSkymap = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("Skymap Options")));
     fields << "UseAltAz" << i18n("Use Horizontal coordinates? (otherwise, use Equatorial)") << i18n("bool");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "ZoomFactor" << i18n("Set the Zoom Factor") << i18n("double");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "FOVName" << i18n("Select angular size for the FOV symbol (in arcmin)") << i18n("double");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "FOVShape" << i18n("Select shape for the FOV symbol (0=Square, 1=Circle, 2=Crosshairs, 4=Bullseye)")
            << i18n("int");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "FOVColor" << i18n("Select color for the FOV symbol") << i18n("string");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "UseAnimatedSlewing" << i18n("Use animated slewing? (otherwise, \"snap\" to new focus)") << i18n("bool");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "UseRefraction" << i18n("Correct for atmospheric refraction?") << i18n("bool");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "UseAutoLabel" << i18n("Automatically attach name label to centered object?") << i18n("bool");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "UseHoverLabel" << i18n("Attach temporary name label when hovering mouse over an object?")
            << i18n("bool");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "UseAutoTrail" << i18n("Automatically add trail to centered solar system body?") << i18n("bool");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
     fields << "FadePlanetTrails" << i18n("Planet trails fade to sky color? (otherwise color is constant)")
            << i18n("bool");
     new QTreeWidgetItem(opsSkymap, fields);
     fields.clear();
 
     argChangeViewOption->OptionName->addItem("UseAltAz");
     argChangeViewOption->OptionName->addItem("ZoomFactor");
     argChangeViewOption->OptionName->addItem("FOVName");
     argChangeViewOption->OptionName->addItem("FOVSize");
     argChangeViewOption->OptionName->addItem("FOVShape");
     argChangeViewOption->OptionName->addItem("FOVColor");
     argChangeViewOption->OptionName->addItem("UseRefraction");
     argChangeViewOption->OptionName->addItem("UseAutoLabel");
     argChangeViewOption->OptionName->addItem("UseHoverLabel");
     argChangeViewOption->OptionName->addItem("UseAutoTrail");
     argChangeViewOption->OptionName->addItem("AnimateSlewing");
     argChangeViewOption->OptionName->addItem("FadePlanetTrails");
 
     opsLimit = new QTreeWidgetItem(otv->optionsList(), QStringList(i18n("Limits")));
     /*
     fields << "magLimitDrawStar" << i18n( "magnitude of faintest star drawn on map when zoomed in" ) << i18n( "double" );
     new QTreeWidgetItem( opsLimit, fields );
     fields.clear();
     fields << "magLimitDrawStarZoomOut" << i18n( "magnitude of faintest star drawn on map when zoomed out" ) << i18n( "double" );
     new QTreeWidgetItem( opsLimit, fields );
     fields.clear();
     */
 
     // TODO: We have disabled the following two features. Enable them when feasible...
     /*
     fields << "magLimitDrawDeepSky" << i18n( "magnitude of faintest nonstellar object drawn on map when zoomed in" ) << i18n( "double" );
     new QTreeWidgetItem( opsLimit, fields );
     fields.clear();
     fields << "magLimitDrawDeepSkyZoomOut" << i18n( "magnitude of faintest nonstellar object drawn on map when zoomed out" ) << i18n( "double" );
     new QTreeWidgetItem( opsLimit, fields );
     fields.clear();
     */
 
     //FIXME: This description is incorrect! Fix after strings freeze
     fields << "starLabelDensity" << i18n("magnitude of faintest star labeled on map") << i18n("double");
     new QTreeWidgetItem(opsLimit, fields);
     fields.clear();
     fields << "magLimitHideStar" << i18n("magnitude of brightest star hidden while slewing") << i18n("double");
     new QTreeWidgetItem(opsLimit, fields);
     fields.clear();
     fields << "magLimitAsteroid" << i18n("magnitude of faintest asteroid drawn on map") << i18n("double");
     new QTreeWidgetItem(opsLimit, fields);
     fields.clear();
     //FIXME: This description is incorrect! Fix after strings freeze
     fields << "asteroidLabelDensity" << i18n("magnitude of faintest asteroid labeled on map") << i18n("double");
     new QTreeWidgetItem(opsLimit, fields);
     fields.clear();
     fields << "maxRadCometName" << i18n("comets nearer to the Sun than this (in AU) are labeled on map")
            << i18n("double");
     new QTreeWidgetItem(opsLimit, fields);
     fields.clear();
 
     //    argChangeViewOption->OptionName->addItem( "magLimitDrawStar" );
     //    argChangeViewOption->OptionName->addItem( "magLimitDrawStarZoomOut" );
     argChangeViewOption->OptionName->addItem("magLimitDrawDeepSky");
     argChangeViewOption->OptionName->addItem("magLimitDrawDeepSkyZoomOut");
     argChangeViewOption->OptionName->addItem("starLabelDensity");
     argChangeViewOption->OptionName->addItem("magLimitHideStar");
     argChangeViewOption->OptionName->addItem("magLimitAsteroid");
     argChangeViewOption->OptionName->addItem("asteroidLabelDensity");
     argChangeViewOption->OptionName->addItem("maxRadCometName");
 
     //init the list of color names and values
     for (unsigned int i = 0; i < ks->data()->colorScheme()->numberOfColors(); ++i)
     {
         argSetColor->ColorName->addItem(ks->data()->colorScheme()->nameAt(i));
     }
 
     //init list of color scheme names
     argLoadColorScheme->SchemeList->addItem(i18nc("use default color scheme", "Default Colors"));
     argLoadColorScheme->SchemeList->addItem(i18nc("use 'star chart' color scheme", "Star Chart"));
     argLoadColorScheme->SchemeList->addItem(i18nc("use 'night vision' color scheme", "Night Vision"));
     argLoadColorScheme->SchemeList->addItem(i18nc("use 'moonless night' color scheme", "Moonless Night"));
 
     QFile file;
     QString line;
     file.setFileName(KSPaths::locate(QStandardPaths::GenericDataLocation,
                                      "colors.dat")); //determine filename in local user KDE directory tree.
     if (file.open(QIODevice::ReadOnly))
     {
         QTextStream stream(&file);
 
         while (!stream.atEnd())
         {
             line = stream.readLine();
             argLoadColorScheme->SchemeList->addItem(line.left(line.indexOf(':')));
         }
         file.close();
     }
 }
 
 //Slots defined in ScriptBuilderUI
 void ScriptBuilder::slotNew()
 {
     saveWarning();
     if (!UnsavedChanges)
     {
         ScriptList.clear();
         sb->ScriptListBox->clear();
         sb->ArgStack->setCurrentWidget(argBlank);
 
         sb->CopyButton->setEnabled(false);
         sb->RemoveButton->setEnabled(false);
         sb->RunButton->setEnabled(false);
         sb->SaveAsButton->setEnabled(false);
 
         currentFileURL.clear();
         currentScriptName.clear();
     }
 }
 
 void ScriptBuilder::slotOpen()
 {
     saveWarning();
 
     QString fname;
     QTemporaryFile tmpfile;
     tmpfile.open();
 
     if (!UnsavedChanges)
     {
         currentFileURL = QFileDialog::getOpenFileUrl(
             KStars::Instance(), QString(), QUrl(currentDir),
             "*.kstars|" + i18nc("Filter by file type: KStars Scripts.", "KStars Scripts (*.kstars)"));
 
         if (currentFileURL.isValid())
         {
             currentDir = currentFileURL.toLocalFile();
 
             ScriptList.clear();
             sb->ScriptListBox->clear();
             sb->ArgStack->setCurrentWidget(argBlank);
 
             if (currentFileURL.isLocalFile())
             {
                 fname = currentFileURL.toLocalFile();
             }
             else
             {
                 fname = tmpfile.fileName();
                 if (KIO::copy(currentFileURL, QUrl(fname))->exec() == false)
                     //if ( ! KIO::NetAccess::download( currentFileURL, fname, (QWidget*) 0 ) )
-                    KMessageBox::sorry(0, i18n("Could not download remote file."), i18n("Download Error"));
+                    KMessageBox::sorry(nullptr, i18n("Could not download remote file."), i18n("Download Error"));
             }
 
             QFile f(fname);
             if (!f.open(QIODevice::ReadOnly))
             {
                 QString message = i18n("Could not open file %1.", f.fileName());
-                KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+                KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
                 currentFileURL.clear();
                 return;
             }
 
             QTextStream istream(&f);
             readScript(istream);
 
             f.close();
         }
         else if (!currentFileURL.url().isEmpty())
         {
             QString message = i18n("Invalid URL: %1", currentFileURL.url());
-            KMessageBox::sorry(0, message, i18n("Invalid URL"));
+            KMessageBox::sorry(nullptr, message, i18n("Invalid URL"));
             currentFileURL.clear();
         }
     }
 }
 
 void ScriptBuilder::slotSave()
 {
     QString fname;
     QTemporaryFile tmpfile;
     tmpfile.open();
 
     if (currentScriptName.isEmpty())
     {
         //Get Script Name and Author info
         if (snd->exec() == QDialog::Accepted)
         {
             currentScriptName = snd->scriptName();
             currentAuthor     = snd->authorName();
         }
         else
         {
             return;
         }
     }
 
     bool newFilename = false;
     if (currentFileURL.isEmpty())
     {
         currentFileURL = QFileDialog::getSaveFileUrl(
             KStars::Instance(), QString(), QUrl(currentDir),
             "*.kstars|" + i18nc("Filter by file type: KStars Scripts.", "KStars Scripts (*.kstars)"));
         newFilename = true;
     }
 
     if (currentFileURL.isValid())
     {
         currentDir = currentFileURL.toLocalFile();
 
         if (currentFileURL.isLocalFile())
         {
             fname = currentFileURL.toLocalFile();
 
             //Warn user if file exists
             if (newFilename == true && QFile::exists(currentFileURL.toLocalFile()))
             {
                 int r = KMessageBox::warningContinueCancel(static_cast<QWidget *>(parent()),
                                                            i18n("A file named \"%1\" already exists. "
                                                                 "Overwrite it?",
                                                                 currentFileURL.fileName()),
                                                            i18n("Overwrite File?"), KStandardGuiItem::overwrite());
 
                 if (r == KMessageBox::Cancel)
                     return;
             }
         }
         else
         {
             fname = tmpfile.fileName();
         }
 
         if (fname.right(7).toLower() != ".kstars")
             fname += ".kstars";
 
         QFile f(fname);
         if (!f.open(QIODevice::WriteOnly))
         {
             QString message = i18n("Could not open file %1.", f.fileName());
-            KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+            KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
             currentFileURL.clear();
             return;
         }
 
         QTextStream ostream(&f);
         writeScript(ostream);
         f.close();
 
 #ifndef _WIN32
         //set rwx for owner, rx for group, rx for other
         chmod(fname.toLatin1(), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
 #endif
 
         if (tmpfile.fileName() == fname)
         {
             //need to upload to remote location
             //if ( ! KIO::NetAccess::upload( tmpfile.fileName(), currentFileURL, (QWidget*) 0 ) )
             if (KIO::storedHttpPost(&tmpfile, currentFileURL)->exec() == false)
             {
                 QString message = i18n("Could not upload image to remote location: %1", currentFileURL.url());
-                KMessageBox::sorry(0, message, i18n("Could not upload file"));
+                KMessageBox::sorry(nullptr, message, i18n("Could not upload file"));
             }
         }
 
         setUnsavedChanges(false);
     }
     else
     {
         QString message = i18n("Invalid URL: %1", currentFileURL.url());
-        KMessageBox::sorry(0, message, i18n("Invalid URL"));
+        KMessageBox::sorry(nullptr, message, i18n("Invalid URL"));
         currentFileURL.clear();
     }
 }
 
 void ScriptBuilder::slotSaveAs()
 {
     currentFileURL.clear();
     currentScriptName.clear();
     slotSave();
 }
 
 void ScriptBuilder::saveWarning()
 {
     if (UnsavedChanges)
     {
         QString caption = i18n("Save Changes to Script?");
         QString message = i18n("The current script has unsaved changes.  Would you like to save before closing it?");
         int ans =
-            KMessageBox::warningYesNoCancel(0, message, caption, KStandardGuiItem::save(), KStandardGuiItem::discard());
+            KMessageBox::warningYesNoCancel(nullptr, message, caption, KStandardGuiItem::save(), KStandardGuiItem::discard());
         if (ans == KMessageBox::Yes)
         {
             slotSave();
             setUnsavedChanges(false);
         }
         else if (ans == KMessageBox::No)
         {
             setUnsavedChanges(false);
         }
 
         //Do nothing if 'cancel' selected
     }
 }
 
 void ScriptBuilder::slotRunScript()
 {
     //hide window while script runs
     // If this is uncommented, the program hangs before the script is executed.  Why?
     //	hide();
 
     //Save current script to a temporary file, then execute that file.
     //For some reason, I can't use KTempFile here!  If I do, then the temporary script
     //is not executable.  Bizarre...
     //KTempFile tmpfile;
     //QString fname = tmpfile.name();
     QString fname = QDir::tempPath() + QDir::separator() + "kstars-tempscript";
 
     QFile f(fname);
     if (f.exists())
         f.remove();
     if (!f.open(QIODevice::WriteOnly))
     {
         QString message = i18n("Could not open file %1.", f.fileName());
-        KMessageBox::sorry(0, message, i18n("Could Not Open File"));
+        KMessageBox::sorry(nullptr, message, i18n("Could Not Open File"));
         currentFileURL.clear();
         return;
     }
 
     QTextStream ostream(&f);
     writeScript(ostream);
     f.close();
 
 #ifndef _WIN32
     //set rwx for owner, rx for group, rx for other
     chmod(QFile::encodeName(f.fileName()), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
 #endif
 
     QProcess p;
 #ifdef Q_OS_OSX
     QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
     QString path            = env.value("PATH", "");
     env.insert("PATH", "/usr/local/bin:" + QCoreApplication::applicationDirPath() + ":" + path);
     p.setProcessEnvironment(env);
 #endif
     p.start(f.fileName());
 
     if (!p.waitForStarted())
         qDebug() << "Process did not start.";
 
     while (!p.waitForFinished(10))
     {
         qApp->processEvents(); //otherwise tempfile may get deleted before script completes.
         if (p.state() != QProcess::Running)
             break;
     }
     //delete temp file
     if (f.exists())
         f.remove();
 
     //uncomment if 'hide()' is uncommented...
     //	show();
 }
 
 /*
   This can't work anymore and is also not protable in any way :(
 */
 void ScriptBuilder::writeScript(QTextStream &ostream)
 {
     // FIXME Without --print-reply, the dbus-send doesn't do anything, why??
     QString dbus_call    = "dbus-send --dest=org.kde.kstars --print-reply ";
     QString main_method  = "/KStars org.kde.kstars.";
     QString clock_method = "/KStars/SimClock org.kde.kstars.SimClock.";
 
     //Write script header
     ostream << "#!/bin/bash" << endl;
     ostream << "#KStars DBus script: " << currentScriptName << endl;
     ostream << "#by " << currentAuthor << endl;
     ostream << "#last modified: " << KStarsDateTime::currentDateTime().toString(Qt::ISODate) << endl;
     ostream << "#" << endl;
 
     foreach (ScriptFunction *sf, ScriptList)
     {
         if (!sf->valid())
             continue;
 
         if (sf->isClockFunction())
         {
             ostream << dbus_call << clock_method << sf->scriptLine() << endl;
         }
         else
         {
             ostream << dbus_call << main_method << sf->scriptLine() << endl;
         }
     }
 
     //Write script footer
     ostream << "##" << endl;
 }
 
 void ScriptBuilder::readScript(QTextStream &istream)
 {
     QString line;
     QString service_name = "org.kde.kstars.";
     QString fn_name;
 
     while (!istream.atEnd())
     {
         line = istream.readLine();
 
         //look for name of script
         if (line.contains("#KStars DBus script: "))
             currentScriptName = line.mid(21).trimmed();
 
         //look for author of scriptbuilder
         if (line.contains("#by "))
             currentAuthor = line.mid(4).trimmed();
 
         //Actual script functions
         if (line.left(4) == "dbus")
         {
             //is ClockFunction?
             if (line.contains("SimClock"))
             {
                 service_name += "SimClock.";
             }
 
             //remove leading dbus prefix
             line = line.mid(line.lastIndexOf(service_name) + service_name.count());
 
             fn_name = line.left(line.indexOf(' '));
 
             line = line.mid(line.indexOf(' ') + 1);
 
             //construct a stringlist that is fcn name and its arg name/value pairs
             QStringList fn;
 
             // If the function lacks any arguments, do not attempt to split
             if (fn_name != line)
                 fn = line.split(' ');
 
             if (parseFunction(fn_name, fn))
             {
                 sb->ScriptListBox->addItem(ScriptList.last()->name());
                 // Initially, any read script is valid!
                 ScriptList.last()->setValid(true);
             }
             else
                 qWarning() << i18n("Could not parse script.  Line was: %1", line);
 
         } // end if left(4) == "dcop"
     }     // end while !atEnd()
 
     //Select first item in sb->ScriptListBox
     if (sb->ScriptListBox->count())
     {
-        sb->ScriptListBox->setCurrentItem(0);
+        sb->ScriptListBox->setCurrentItem(nullptr);
         slotArgWidget();
     }
 }
 
 bool ScriptBuilder::parseFunction(QString fn_name, QStringList &fn)
 {
     // clean up the string list first if needed
     // We need to perform this in case we havea quoted string "NGC 3000" because this will counted
     // as two arguments, and it should be counted as one.
     bool foundQuote(false), quoteProcessed(false);
     QString cur, arg;
     QStringList::iterator it;
 
     for (it = fn.begin(); it != fn.end(); ++it)
     {
         cur = (*it);
 
         cur = cur.mid(cur.indexOf(":") + 1).remove('\'');
 
         (*it) = cur;
 
         if (cur.startsWith('\"'))
         {
             arg += cur.rightRef(cur.length() - 1);
             arg += ' ';
             foundQuote     = true;
             quoteProcessed = true;
         }
         else if (cur.endsWith('\"'))
         {
             arg += cur.leftRef(cur.length() - 1);
             arg += '\'';
             foundQuote = false;
         }
         else if (foundQuote)
         {
             arg += cur;
             arg += ' ';
         }
         else
         {
             arg += cur;
             arg += '\'';
         }
     }
 
     if (quoteProcessed)
         fn = arg.split('\'', QString::SkipEmptyParts);
 
     //loop over known functions to find a name match
     foreach (ScriptFunction *sf, KStarsFunctionList)
     {
         if (fn_name == sf->name())
         {
             if (fn_name == "setGeoLocation")
             {
                 QString city(fn[0]), prov, cntry(fn[1]);
                 prov.clear();
                 if (fn.count() == 4)
                 {
                     prov  = fn[1];
                     cntry = fn[2];
                 }
                 if (fn.count() == 3 || fn.count() == 4)
                 {
                     ScriptList.append(new ScriptFunction(sf));
                     ScriptList.last()->setArg(0, city);
                     ScriptList.last()->setArg(1, prov);
                     ScriptList.last()->setArg(2, cntry);
                 }
                 else
                     return false;
             }
             else if (fn.count() != sf->numArgs())
                 return false;
 
             ScriptList.append(new ScriptFunction(sf));
 
             for (int i = 0; i < sf->numArgs(); ++i)
                 ScriptList.last()->setArg(i, fn[i]);
 
             return true;
         }
 
         foreach (ScriptFunction *sf, SimClockFunctionList)
         {
             if (fn_name == sf->name())
             {
                 if (fn.count() != sf->numArgs())
                     return false;
 
                 ScriptList.append(new ScriptFunction(sf));
 
                 for (int i = 0; i < sf->numArgs(); ++i)
                     ScriptList.last()->setArg(i, fn[i]);
 
                 return true;
             }
         }
     }
 
     //if we get here, no function-name match was found
     return false;
 }
 
 void ScriptBuilder::setUnsavedChanges(bool b)
 {
     if (checkForChanges)
     {
         UnsavedChanges = b;
         sb->SaveButton->setEnabled(b);
     }
 }
 
 void ScriptBuilder::slotCopyFunction()
 {
     if (!UnsavedChanges)
         setUnsavedChanges(true);
 
     int Pos = sb->ScriptListBox->currentRow() + 1;
     ScriptList.insert(Pos, new ScriptFunction(ScriptList[Pos - 1]));
     //copy ArgVals
     for (int i = 0; i < ScriptList[Pos - 1]->numArgs(); ++i)
         ScriptList[Pos]->setArg(i, ScriptList[Pos - 1]->argVal(i));
 
     sb->ScriptListBox->insertItem(Pos, ScriptList[Pos]->name());
     //sb->ScriptListBox->setSelected( Pos, true );
     sb->ScriptListBox->setCurrentRow(Pos);
     slotArgWidget();
 }
 
 void ScriptBuilder::slotRemoveFunction()
 {
     setUnsavedChanges(true);
 
     int Pos = sb->ScriptListBox->currentRow();
     ScriptList.removeAt(Pos);
     sb->ScriptListBox->takeItem(Pos);
     if (sb->ScriptListBox->count() == 0)
     {
         sb->ArgStack->setCurrentWidget(argBlank);
         sb->CopyButton->setEnabled(false);
         sb->RemoveButton->setEnabled(false);
         sb->RunButton->setEnabled(false);
         sb->SaveAsButton->setEnabled(false);
     }
     else
     {
         //sb->ScriptListBox->setSelected( Pos, true );
         if (Pos == sb->ScriptListBox->count())
         {
             Pos = Pos - 1;
         }
         sb->ScriptListBox->setCurrentRow(Pos);
     }
     slotArgWidget();
 }
 
 void ScriptBuilder::slotAddFunction()
 {
     ScriptFunction *found        = nullptr;
     QTreeWidgetItem *currentItem = sb->FunctionTree->currentItem();
 
     if (currentItem == nullptr || currentItem->parent() == nullptr)
         return;
 
     for (auto &sc : KStarsFunctionList)
     {
         if (sc->prototype() == currentItem->text(0))
         {
             found = sc;
             break;
         }
     }
 
     for (auto &sc : SimClockFunctionList)
     {
         if (sc->prototype() == currentItem->text(0))
         {
             found = sc;
             break;
         }
     }
 
     if (found == nullptr)
         return;
 
     setUnsavedChanges(true);
 
     int Pos = sb->ScriptListBox->currentRow() + 1;
 
     ScriptList.insert(Pos, new ScriptFunction(found));
     sb->ScriptListBox->insertItem(Pos, ScriptList[Pos]->name());
     sb->ScriptListBox->setCurrentRow(Pos);
     slotArgWidget();
 }
 
 void ScriptBuilder::slotMoveFunctionUp()
 {
     if (sb->ScriptListBox->currentRow() > 0)
     {
         setUnsavedChanges(true);
 
         //QString t = sb->ScriptListBox->currentItem()->text();
         QString t      = sb->ScriptListBox->currentItem()->text();
         unsigned int n = sb->ScriptListBox->currentRow();
 
         ScriptFunction *tmp = ScriptList.takeAt(n);
         ScriptList.insert(n - 1, tmp);
 
         sb->ScriptListBox->takeItem(n);
         sb->ScriptListBox->insertItem(n - 1, t);
         sb->ScriptListBox->setCurrentRow(n - 1);
         slotArgWidget();
     }
 }
 
 void ScriptBuilder::slotMoveFunctionDown()
 {
     if (sb->ScriptListBox->currentRow() > -1 && sb->ScriptListBox->currentRow() < ((int)sb->ScriptListBox->count()) - 1)
     {
         setUnsavedChanges(true);
 
         QString t      = sb->ScriptListBox->currentItem()->text();
         unsigned int n = sb->ScriptListBox->currentRow();
 
         ScriptFunction *tmp = ScriptList.takeAt(n);
         ScriptList.insert(n + 1, tmp);
 
         sb->ScriptListBox->takeItem(n);
         sb->ScriptListBox->insertItem(n + 1, t);
         sb->ScriptListBox->setCurrentRow(n + 1);
         slotArgWidget();
     }
 }
 
 void ScriptBuilder::slotArgWidget()
 {
     //First, setEnabled on buttons that act on the selected script function
     if (sb->ScriptListBox->currentRow() == -1) //no selection
     {
         sb->CopyButton->setEnabled(false);
         sb->RemoveButton->setEnabled(false);
         sb->UpButton->setEnabled(false);
         sb->DownButton->setEnabled(false);
     }
     else if (sb->ScriptListBox->count() == 1) //only one item, so disable up/down buttons
     {
         sb->CopyButton->setEnabled(true);
         sb->RemoveButton->setEnabled(true);
         sb->UpButton->setEnabled(false);
         sb->DownButton->setEnabled(false);
     }
     else if (sb->ScriptListBox->currentRow() == 0) //first item selected
     {
         sb->CopyButton->setEnabled(true);
         sb->RemoveButton->setEnabled(true);
         sb->UpButton->setEnabled(false);
         sb->DownButton->setEnabled(true);
     }
     else if (sb->ScriptListBox->currentRow() == ((int)sb->ScriptListBox->count()) - 1) //last item selected
     {
         sb->CopyButton->setEnabled(true);
         sb->RemoveButton->setEnabled(true);
         sb->UpButton->setEnabled(true);
         sb->DownButton->setEnabled(false);
     }
     else //other item selected
     {
         sb->CopyButton->setEnabled(true);
         sb->RemoveButton->setEnabled(true);
         sb->UpButton->setEnabled(true);
         sb->DownButton->setEnabled(true);
     }
 
     //RunButton and SaveAs button enabled when script not empty.
     if (sb->ScriptListBox->count())
     {
         sb->RunButton->setEnabled(true);
         sb->SaveAsButton->setEnabled(true);
     }
     else
     {
         sb->RunButton->setEnabled(false);
         sb->SaveAsButton->setEnabled(false);
         setUnsavedChanges(false);
     }
 
     //Display the function's arguments widget
     if (sb->ScriptListBox->currentRow() > -1 && sb->ScriptListBox->currentRow() < ((int)sb->ScriptListBox->count()))
     {
         unsigned int n     = sb->ScriptListBox->currentRow();
         ScriptFunction *sf = ScriptList.at(n);
 
         checkForChanges = false; //Don't signal unsaved changes
 
         if (sf->name() == "lookTowards")
         {
             sb->ArgStack->setCurrentWidget(argLookToward);
             QString s = sf->argVal(0);
             argLookToward->FocusEdit->setEditText(s);
         }
         else if (sf->name() == "addLabel" || sf->name() == "removeLabel" || sf->name() == "addTrail" ||
                  sf->name() == "removeTrail")
         {
             sb->ArgStack->setCurrentWidget(argFindObject);
             QString s = sf->argVal(0);
             argFindObject->NameEdit->setText(s);
         }
         else if (sf->name() == "setRaDec")
         {
             bool ok(false);
             double r(0.0), d(0.0);
             dms ra(0.0);
 
             sb->ArgStack->setCurrentWidget(argSetRaDec);
 
             ok = !sf->argVal(0).isEmpty();
             if (ok)
                 r = sf->argVal(0).toDouble(&ok);
             else
                 argSetRaDec->RABox->clear();
             if (ok)
             {
                 ra.setH(r);
                 argSetRaDec->RABox->showInHours(ra);
             }
 
             ok = !sf->argVal(1).isEmpty();
             if (ok)
                 d = sf->argVal(1).toDouble(&ok);
             else
                 argSetRaDec->DecBox->clear();
             if (ok)
                 argSetRaDec->DecBox->showInDegrees(dms(d));
         }
         else if (sf->name() == "setAltAz")
         {
             bool ok(false);
             double x(0.0), y(0.0);
 
             sb->ArgStack->setCurrentWidget(argSetAltAz);
 
             ok = !sf->argVal(0).isEmpty();
             if (ok)
                 y = sf->argVal(0).toDouble(&ok);
             else
                 argSetAltAz->AzBox->clear();
             if (ok)
                 argSetAltAz->AltBox->showInDegrees(dms(y));
             else
                 argSetAltAz->AltBox->clear();
 
             ok = !sf->argVal(1).isEmpty();
             x  = sf->argVal(1).toDouble(&ok);
             if (ok)
                 argSetAltAz->AzBox->showInDegrees(dms(x));
         }
         else if (sf->name() == "zoomIn")
         {
             sb->ArgStack->setCurrentWidget(argBlank);
             //no Args
         }
         else if (sf->name() == "zoomOut")
         {
             sb->ArgStack->setCurrentWidget(argBlank);
             //no Args
         }
         else if (sf->name() == "defaultZoom")
         {
             sb->ArgStack->setCurrentWidget(argBlank);
             //no Args
         }
         else if (sf->name() == "zoom")
         {
             sb->ArgStack->setCurrentWidget(argZoom);
             bool ok(false);
             /*double z = */ sf->argVal(0).toDouble(&ok);
             if (ok)
                 argZoom->ZoomBox->setText(sf->argVal(0));
             else
                 argZoom->ZoomBox->setText("2000.");
         }
         else if (sf->name() == "exportImage")
         {
             sb->ArgStack->setCurrentWidget(argExportImage);
             argExportImage->ExportFileName->setUrl(QUrl::fromUserInput(sf->argVal(0)));
             bool ok(false);
             int w = 0, h = 0;
             w = sf->argVal(1).toInt(&ok);
             if (ok)
                 h = sf->argVal(2).toInt(&ok);
             if (ok)
             {
                 argExportImage->ExportWidth->setValue(w);
                 argExportImage->ExportHeight->setValue(h);
             }
             else
             {
                 argExportImage->ExportWidth->setValue(ks->map()->width());
                 argExportImage->ExportHeight->setValue(ks->map()->height());
             }
         }
         else if (sf->name() == "printImage")
         {
             if (sf->argVal(0) == i18n("true"))
                 argPrintImage->UsePrintDialog->setChecked(true);
             else
                 argPrintImage->UsePrintDialog->setChecked(false);
             if (sf->argVal(1) == i18n("true"))
                 argPrintImage->UseChartColors->setChecked(true);
             else
                 argPrintImage->UseChartColors->setChecked(false);
         }
         else if (sf->name() == "setLocalTime")
         {
             sb->ArgStack->setCurrentWidget(argSetLocalTime);
             bool ok(false);
             int year = 0, month = 0, day = 0, hour = 0, min = 0, sec = 0;
 
             year = sf->argVal(0).toInt(&ok);
             if (ok)
                 month = sf->argVal(1).toInt(&ok);
             if (ok)
                 day = sf->argVal(2).toInt(&ok);
             if (ok)
                 argSetLocalTime->DateWidget->setDate(QDate(year, month, day));
             else
                 argSetLocalTime->DateWidget->setDate(QDate::currentDate());
 
             hour = sf->argVal(3).toInt(&ok);
             if (sf->argVal(3).isEmpty())
                 ok = false;
             if (ok)
                 min = sf->argVal(4).toInt(&ok);
             if (ok)
                 sec = sf->argVal(5).toInt(&ok);
             if (ok)
                 argSetLocalTime->TimeBox->setTime(QTime(hour, min, sec));
             else
                 argSetLocalTime->TimeBox->setTime(QTime(QTime::currentTime()));
         }
         else if (sf->name() == "waitFor")
         {
             sb->ArgStack->setCurrentWidget(argWaitFor);
             bool ok(false);
             int sec = sf->argVal(0).toInt(&ok);
             if (ok)
                 argWaitFor->DelayBox->setValue(sec);
             else
                 argWaitFor->DelayBox->setValue(0);
         }
         else if (sf->name() == "waitForKey")
         {
             sb->ArgStack->setCurrentWidget(argWaitForKey);
             if (sf->argVal(0).length() == 1 || sf->argVal(0).toLower() == "space")
                 argWaitForKey->WaitKeyEdit->setText(sf->argVal(0));
             else
                 argWaitForKey->WaitKeyEdit->setText(QString());
         }
         else if (sf->name() == "setTracking")
         {
             sb->ArgStack->setCurrentWidget(argSetTracking);
             if (sf->argVal(0) == i18n("true"))
                 argSetTracking->CheckTrack->setChecked(true);
             else
                 argSetTracking->CheckTrack->setChecked(false);
         }
         else if (sf->name() == "changeViewOption")
         {
             sb->ArgStack->setCurrentWidget(argChangeViewOption);
             argChangeViewOption->OptionName->setCurrentIndex(argChangeViewOption->OptionName->findText(sf->argVal(0)));
             argChangeViewOption->OptionValue->setText(sf->argVal(1));
         }
         else if (sf->name() == "setGeoLocation")
         {
             sb->ArgStack->setCurrentWidget(argSetGeoLocation);
             argSetGeoLocation->CityName->setText(sf->argVal(0));
             argSetGeoLocation->ProvinceName->setText(sf->argVal(1));
             argSetGeoLocation->CountryName->setText(sf->argVal(2));
         }
         else if (sf->name() == "setColor")
         {
             sb->ArgStack->setCurrentWidget(argSetColor);
             if (sf->argVal(0).isEmpty())
                 sf->setArg(0, "SkyColor"); //initialize default value
             argSetColor->ColorName->setCurrentIndex(
                 argSetColor->ColorName->findText(ks->data()->colorScheme()->nameFromKey(sf->argVal(0))));
             argSetColor->ColorValue->setColor(QColor(sf->argVal(1).remove('\\')));
         }
         else if (sf->name() == "loadColorScheme")
         {
             sb->ArgStack->setCurrentWidget(argLoadColorScheme);
             argLoadColorScheme->SchemeList->setCurrentItem(
                 argLoadColorScheme->SchemeList->findItems(sf->argVal(0).remove('\"'), Qt::MatchExactly).at(0));
         }
         else if (sf->name() == "stop")
         {
             sb->ArgStack->setCurrentWidget(argBlank);
             //no Args
         }
         else if (sf->name() == "start")
         {
             sb->ArgStack->setCurrentWidget(argBlank);
             //no Args
         }
         else if (sf->name() == "setClockScale")
         {
             sb->ArgStack->setCurrentWidget(argTimeScale);
             bool ok(false);
             double ts = sf->argVal(0).toDouble(&ok);
             if (ok)
                 argTimeScale->TimeScale->tsbox()->changeScale(float(ts));
             else
                 argTimeScale->TimeScale->tsbox()->changeScale(0.0);
         }
 
         checkForChanges = true; //signal unsaved changes if the argument widgets are changed
     }
 }
 
 void ScriptBuilder::slotShowDoc()
 {
     ScriptFunction *found        = nullptr;
     QTreeWidgetItem *currentItem = sb->FunctionTree->currentItem();
 
     if (currentItem == nullptr || currentItem->parent() == nullptr)
         return;
 
     for (auto &sc : KStarsFunctionList)
     {
         if (sc->prototype() == currentItem->text(0))
         {
             found = sc;
             break;
         }
     }
 
     for (auto &sc : SimClockFunctionList)
     {
         if (sc->prototype() == currentItem->text(0))
         {
             found = sc;
             break;
         }
     }
 
     if (found == nullptr)
     {
         sb->AddButton->setEnabled(false);
         qWarning() << i18n("Function index out of bounds.");
         return;
     }
 
     sb->AddButton->setEnabled(true);
     sb->FuncDoc->setHtml(found->description());
 }
 
 //Slots for Arg Widgets
 void ScriptBuilder::slotFindCity()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
 
     if (ld->exec() == QDialog::Accepted)
     {
         if (ld->selectedCity())
         {
             // set new location names
             argSetGeoLocation->CityName->setText(ld->selectedCityName());
             if (!ld->selectedProvinceName().isEmpty())
             {
                 argSetGeoLocation->ProvinceName->setText(ld->selectedProvinceName());
             }
             else
             {
                 argSetGeoLocation->ProvinceName->clear();
             }
             argSetGeoLocation->CountryName->setText(ld->selectedCountryName());
 
             ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
             if (sf->name() == "setGeoLocation")
             {
                 setUnsavedChanges(true);
 
                 sf->setArg(0, ld->selectedCityName());
                 sf->setArg(1, ld->selectedProvinceName());
                 sf->setArg(2, ld->selectedCountryName());
             }
             else
             {
                 warningMismatch("setGeoLocation");
             }
         }
     }
     delete ld;
 }
 
 void ScriptBuilder::slotFindObject()
 {
     QPointer<FindDialog> fd = new FindDialog(ks);
 
     if (fd->exec() == QDialog::Accepted && fd->targetObject())
     {
         setUnsavedChanges(true);
 
         if (sender() == argLookToward->FindButton)
             argLookToward->FocusEdit->setEditText(fd->targetObject()->name());
         else
             argFindObject->NameEdit->setText(fd->targetObject()->name());
     }
     delete fd;
 }
 
 void ScriptBuilder::slotShowOptions()
 {
     //Show tree-view of view options
     if (otv->exec() == QDialog::Accepted)
     {
         argChangeViewOption->OptionName->setCurrentIndex(
             argChangeViewOption->OptionName->findText(otv->optionsList()->currentItem()->text(0)));
     }
 }
 
 void ScriptBuilder::slotLookToward()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "lookTowards")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, argLookToward->FocusEdit->currentText());
         sf->setValid(true);
     }
     else
     {
         warningMismatch("lookTowards");
     }
 }
 
 void ScriptBuilder::slotArgFindObject()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "addLabel" || sf->name() == "removeLabel" || sf->name() == "addTrail" ||
         sf->name() == "removeTrail")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, argFindObject->NameEdit->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch(sf->name());
     }
 }
 
 void ScriptBuilder::slotRa()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setRaDec")
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if (argSetRaDec->RABox->text().isEmpty())
             return;
 
         bool ok(false);
         dms ra = argSetRaDec->RABox->createDms(false, &ok);
         if (ok)
         {
             setUnsavedChanges(true);
 
             sf->setArg(0, QString("%1").arg(ra.Hours()));
             if (!sf->argVal(1).isEmpty())
                 sf->setValid(true);
         }
         else
         {
             sf->setArg(0, QString());
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("setRaDec");
     }
 }
 
 void ScriptBuilder::slotDec()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setRaDec")
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if (argSetRaDec->DecBox->text().isEmpty())
             return;
 
         bool ok(false);
         dms dec = argSetRaDec->DecBox->createDms(true, &ok);
         if (ok)
         {
             setUnsavedChanges(true);
 
             sf->setArg(1, QString("%1").arg(dec.Degrees()));
             if (!sf->argVal(0).isEmpty())
                 sf->setValid(true);
         }
         else
         {
             sf->setArg(1, QString());
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("setRaDec");
     }
 }
 
 void ScriptBuilder::slotAz()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setAltAz")
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if (argSetAltAz->AzBox->text().isEmpty())
             return;
 
         bool ok(false);
         dms az = argSetAltAz->AzBox->createDms(true, &ok);
         if (ok)
         {
             setUnsavedChanges(true);
             sf->setArg(1, QString("%1").arg(az.Degrees()));
             if (!sf->argVal(0).isEmpty())
                 sf->setValid(true);
         }
         else
         {
             sf->setArg(1, QString());
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("setAltAz");
     }
 }
 
 void ScriptBuilder::slotAlt()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setAltAz")
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if (argSetAltAz->AltBox->text().isEmpty())
             return;
 
         bool ok(false);
         dms alt = argSetAltAz->AltBox->createDms(true, &ok);
         if (ok)
         {
             setUnsavedChanges(true);
 
             sf->setArg(0, QString("%1").arg(alt.Degrees()));
             if (!sf->argVal(1).isEmpty())
                 sf->setValid(true);
         }
         else
         {
             sf->setArg(0, QString());
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("setAltAz");
     }
 }
 
 void ScriptBuilder::slotChangeDate()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setLocalTime")
     {
         setUnsavedChanges(true);
 
         QDate date = argSetLocalTime->DateWidget->date();
 
         sf->setArg(0, QString("%1").arg(date.year()));
         sf->setArg(1, QString("%1").arg(date.month()));
         sf->setArg(2, QString("%1").arg(date.day()));
         if (!sf->argVal(3).isEmpty())
             sf->setValid(true);
     }
     else
     {
         warningMismatch("setLocalTime");
     }
 }
 
 void ScriptBuilder::slotChangeTime()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setLocalTime")
     {
         setUnsavedChanges(true);
 
         QTime time = argSetLocalTime->TimeBox->time();
 
         sf->setArg(3, QString("%1").arg(time.hour()));
         sf->setArg(4, QString("%1").arg(time.minute()));
         sf->setArg(5, QString("%1").arg(time.second()));
         if (!sf->argVal(0).isEmpty())
             sf->setValid(true);
     }
     else
     {
         warningMismatch("setLocalTime");
     }
 }
 
 void ScriptBuilder::slotWaitFor()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "waitFor")
     {
         bool ok(false);
         int delay = argWaitFor->DelayBox->text().toInt(&ok);
 
         if (ok)
         {
             setUnsavedChanges(true);
 
             sf->setArg(0, QString("%1").arg(delay));
             sf->setValid(true);
         }
         else
         {
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("waitFor");
     }
 }
 
 void ScriptBuilder::slotWaitForKey()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "waitForKey")
     {
         QString sKey = argWaitForKey->WaitKeyEdit->text().trimmed();
 
         //DCOP script can only use single keystrokes; make sure entry is either one character,
         //or the word 'space'
         if (sKey.length() == 1 || sKey == "space")
         {
             setUnsavedChanges(true);
 
             sf->setArg(0, sKey);
             sf->setValid(true);
         }
         else
         {
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("waitForKey");
     }
 }
 
 void ScriptBuilder::slotTracking()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setTracking")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, (argSetTracking->CheckTrack->isChecked() ? i18n("true") : i18n("false")));
         sf->setValid(true);
     }
     else
     {
         warningMismatch("setTracking");
     }
 }
 
 void ScriptBuilder::slotViewOption()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "changeViewOption")
     {
         if (argChangeViewOption->OptionName->currentIndex() >= 0 && argChangeViewOption->OptionValue->text().length())
         {
             setUnsavedChanges(true);
 
             sf->setArg(0, argChangeViewOption->OptionName->currentText());
             sf->setArg(1, argChangeViewOption->OptionValue->text());
             sf->setValid(true);
         }
         else
         {
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("changeViewOption");
     }
 }
 
 void ScriptBuilder::slotChangeCity()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setGeoLocation")
     {
         QString city = argSetGeoLocation->CityName->text();
 
         if (city.length())
         {
             setUnsavedChanges(true);
 
             sf->setArg(0, city);
             if (sf->argVal(2).length())
                 sf->setValid(true);
         }
         else
         {
             sf->setArg(0, QString());
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("setGeoLocation");
     }
 }
 
 void ScriptBuilder::slotChangeProvince()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setGeoLocation")
     {
         QString province = argSetGeoLocation->ProvinceName->text();
 
         if (province.length())
         {
             setUnsavedChanges(true);
 
             sf->setArg(1, province);
             if (sf->argVal(0).length() && sf->argVal(2).length())
                 sf->setValid(true);
         }
         else
         {
             sf->setArg(1, QString());
             //might not be invalid
         }
     }
     else
     {
         warningMismatch("setGeoLocation");
     }
 }
 
 void ScriptBuilder::slotChangeCountry()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setGeoLocation")
     {
         QString country = argSetGeoLocation->CountryName->text();
 
         if (country.length())
         {
             setUnsavedChanges(true);
 
             sf->setArg(2, country);
             if (sf->argVal(0).length())
                 sf->setValid(true);
         }
         else
         {
             sf->setArg(2, QString());
             sf->setValid(false);
         }
     }
     else
     {
         warningMismatch("setGeoLocation");
     }
 }
 
 void ScriptBuilder::slotTimeScale()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setClockScale")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, QString("%1").arg(argTimeScale->TimeScale->tsbox()->timeScale()));
         sf->setValid(true);
     }
     else
     {
         warningMismatch("setClockScale");
     }
 }
 
 void ScriptBuilder::slotZoom()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "zoom")
     {
         setUnsavedChanges(true);
 
         bool ok(false);
         argZoom->ZoomBox->text().toDouble(&ok);
         if (ok)
         {
             sf->setArg(0, argZoom->ZoomBox->text());
             sf->setValid(true);
         }
     }
     else
     {
         warningMismatch("zoom");
     }
 }
 
 void ScriptBuilder::slotExportImage()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "exportImage")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, argExportImage->ExportFileName->url().url());
         sf->setArg(1, QString("%1").arg(argExportImage->ExportWidth->value()));
         sf->setArg(2, QString("%1").arg(argExportImage->ExportHeight->value()));
         sf->setValid(true);
     }
     else
     {
         warningMismatch("exportImage");
     }
 }
 
 void ScriptBuilder::slotPrintImage()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "printImage")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, (argPrintImage->UsePrintDialog->isChecked() ? i18n("true") : i18n("false")));
         sf->setArg(1, (argPrintImage->UseChartColors->isChecked() ? i18n("true") : i18n("false")));
         sf->setValid(true);
     }
     else
     {
         warningMismatch("exportImage");
     }
 }
 
 void ScriptBuilder::slotChangeColorName()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setColor")
     {
         setUnsavedChanges(true);
 
         argSetColor->ColorValue->setColor(ks->data()->colorScheme()->colorAt(argSetColor->ColorName->currentIndex()));
         sf->setArg(0, ks->data()->colorScheme()->keyAt(argSetColor->ColorName->currentIndex()));
         QString cname(argSetColor->ColorValue->color().name());
         //if ( cname.at(0) == '#' ) cname = "\\" + cname; //prepend a "\" so bash doesn't think we have a comment
         sf->setArg(1, cname);
         sf->setValid(true);
     }
     else
     {
         warningMismatch("setColor");
     }
 }
 
 void ScriptBuilder::slotChangeColor()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "setColor")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, ks->data()->colorScheme()->keyAt(argSetColor->ColorName->currentIndex()));
         QString cname(argSetColor->ColorValue->color().name());
         //if ( cname.at(0) == '#' ) cname = "\\" + cname; //prepend a "\" so bash doesn't think we have a comment
         sf->setArg(1, cname);
         sf->setValid(true);
     }
     else
     {
         warningMismatch("setColor");
     }
 }
 
 void ScriptBuilder::slotLoadColorScheme()
 {
     ScriptFunction *sf = ScriptList[sb->ScriptListBox->currentRow()];
 
     if (sf->name() == "loadColorScheme")
     {
         setUnsavedChanges(true);
 
         sf->setArg(0, '\"' + argLoadColorScheme->SchemeList->currentItem()->text() + '\"');
         sf->setValid(true);
     }
     else
     {
         warningMismatch("loadColorScheme");
     }
 }
 
 void ScriptBuilder::slotClose()
 {
     saveWarning();
 
     if (!UnsavedChanges)
     {
         ScriptList.clear();
         sb->ScriptListBox->clear();
         sb->ArgStack->setCurrentWidget(argBlank);
         close();
     }
 }
 
 //TODO JM: INDI Scripting to be included in KDE 4.1
 
 #if 0
 void ScriptBuilder::slotINDIStartDeviceName()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "startINDI" )
     {
         setUnsavedChanges( true );
 
         sf->setArg(0, argStartINDI->deviceName->text());
         sf->setArg(1, argStartINDI->LocalButton->isChecked() ? "true" : "false");
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "startINDI" );
     }
 
 }
 
 void ScriptBuilder::slotINDIStartDeviceMode()
 {
 
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "startINDI" )
     {
         setUnsavedChanges( true );
 
         sf->setArg(1, argStartINDI->LocalButton->isChecked() ? "true" : "false");
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "startINDI" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetDevice()
 {
 
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIDevice" )
     {
         setUnsavedChanges( true );
 
         sf->setArg(0, argSetDeviceINDI->deviceName->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "startINDI" );
     }
 }
 
 void ScriptBuilder::slotINDIShutdown()
 {
 
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "shutdownINDI" )
     {
         if (argShutdownINDI->deviceName->text().isEmpty())
         {
             sf->setValid(false);
             return;
         }
 
         if (sf->argVal(0) != argShutdownINDI->deviceName->text())
             setUnsavedChanges( true );
 
         sf->setArg(0, argShutdownINDI->deviceName->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "shutdownINDI" );
     }
 
 }
 
 void ScriptBuilder::slotINDISwitchDeviceConnection()
 {
 
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "switchINDI" )
     {
 
         if (sf->argVal(0) != (argSwitchINDI->OnButton->isChecked() ? "true" : "false"))
             setUnsavedChanges( true );
 
         sf->setArg(0, argSwitchINDI->OnButton->isChecked() ? "true" : "false");
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "switchINDI" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetPortDevicePort()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIPort" )
     {
 
         if (argSetPortINDI->devicePort->text().isEmpty())
         {
             sf->setValid(false);
             return;
         }
 
         if (sf->argVal(0) != argSetPortINDI->devicePort->text())
             setUnsavedChanges( true );
 
         sf->setArg(0, argSetPortINDI->devicePort->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIPort" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetTargetCoordDeviceRA()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDITargetCoord" )
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if ( argSetTargetCoordINDI->RABox->text().isEmpty() )
         {
             sf->setValid(false);
             return;
         }
 
         bool ok(false);
         dms ra = argSetTargetCoordINDI->RABox->createDms(false, &ok);
         if ( ok )
         {
 
             if (sf->argVal(0) != QString( "%1" ).arg( ra.Hours() ))
                 setUnsavedChanges( true );
 
             sf->setArg( 0, QString( "%1" ).arg( ra.Hours() ) );
             if ( ( ! sf->argVal(1).isEmpty() ))
                 sf->setValid( true );
             else
                 sf->setValid(false);
 
         }
         else
         {
             sf->setArg( 0, QString() );
             sf->setValid( false );
         }
     }
     else
     {
         warningMismatch( "setINDITargetCoord" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetTargetCoordDeviceDEC()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDITargetCoord" )
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if ( argSetTargetCoordINDI->DecBox->text().isEmpty() )
         {
             sf->setValid(false);
             return;
         }
 
         bool ok(false);
         dms dec = argSetTargetCoordINDI->DecBox->createDms(true, &ok);
         if ( ok )
         {
 
             if (sf->argVal(1) != QString( "%1" ).arg( dec.Degrees() ))
                 setUnsavedChanges( true );
 
             sf->setArg( 1, QString( "%1" ).arg( dec.Degrees() ) );
             if ( ( ! sf->argVal(0).isEmpty() ))
                 sf->setValid( true );
             else
                 sf->setValid(false);
 
         }
         else
         {
             sf->setArg( 1, QString() );
             sf->setValid( false );
         }
     }
     else
     {
         warningMismatch( "setINDITargetCoord" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetTargetNameTargetName()
 {
 
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDITargetName" )
     {
         if (argSetTargetNameINDI->targetName->text().isEmpty())
         {
             sf->setValid(false);
             return;
         }
 
         if (sf->argVal(0) != argSetTargetNameINDI->targetName->text())
             setUnsavedChanges( true );
 
         sf->setArg(0, argSetTargetNameINDI->targetName->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDITargetName" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetActionName()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIAction" )
     {
         if (argSetActionINDI->actionName->text().isEmpty())
         {
             sf->setValid(false);
             return;
         }
 
         if (sf->argVal(0) != argSetActionINDI->actionName->text())
             setUnsavedChanges( true );
 
         sf->setArg(0, argSetActionINDI->actionName->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIAction" );
     }
 
 }
 
 void ScriptBuilder::slotINDIWaitForActionName()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "waitForINDIAction" )
     {
         if (argWaitForActionINDI->actionName->text().isEmpty())
         {
             sf->setValid(false);
             return;
         }
 
         if (sf->argVal(0) != argWaitForActionINDI->actionName->text())
             setUnsavedChanges( true );
 
         sf->setArg(0, argWaitForActionINDI->actionName->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "waitForINDIAction" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetFocusSpeed()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIFocusSpeed" )
     {
 
         if (sf->argVal(0).toInt() != argSetFocusSpeedINDI->speedIN->value())
             setUnsavedChanges( true );
 
         sf->setArg(0, QString("%1").arg(argSetFocusSpeedINDI->speedIN->value()));
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIFocusSpeed" );
     }
 
 }
 
 void ScriptBuilder::slotINDIStartFocusDirection()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "startINDIFocus" )
     {
         if (sf->argVal(0) != argStartFocusINDI->directionCombo->currentText())
             setUnsavedChanges( true );
 
         sf->setArg(0, argStartFocusINDI->directionCombo->currentText());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "startINDIFocus" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetFocusTimeout()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIFocusTimeout" )
     {
         if (sf->argVal(0).toInt() != argSetFocusTimeoutINDI->timeOut->value())
             setUnsavedChanges( true );
 
         sf->setArg(0, QString("%1").arg(argSetFocusTimeoutINDI->timeOut->value()));
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIFocusTimeout" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetGeoLocationDeviceLong()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIGeoLocation" )
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if ( argSetGeoLocationINDI->longBox->text().isEmpty())
         {
             sf->setValid(false);
             return;
         }
 
         bool ok(false);
         dms longitude = argSetGeoLocationINDI->longBox->createDms(true, &ok);
         if ( ok )
         {
 
             if (sf->argVal(0) != QString( "%1" ).arg( longitude.Degrees()))
                 setUnsavedChanges( true );
 
             sf->setArg( 0, QString( "%1" ).arg( longitude.Degrees() ) );
             if ( ! sf->argVal(1).isEmpty() )
                 sf->setValid( true );
             else
                 sf->setValid(false);
 
         }
         else
         {
             sf->setArg( 0, QString() );
             sf->setValid( false );
         }
     }
     else
     {
         warningMismatch( "setINDIGeoLocation" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetGeoLocationDeviceLat()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIGeoLocation" )
     {
         //do nothing if box is blank (because we could be clearing boxes while switcing argWidgets)
         if ( argSetGeoLocationINDI->latBox->text().isEmpty() )
         {
             sf->setValid(false);
             return;
         }
 
         bool ok(false);
         dms latitude = argSetGeoLocationINDI->latBox->createDms(true, &ok);
         if ( ok )
         {
 
             if (sf->argVal(1) != QString( "%1" ).arg( latitude.Degrees()))
                 setUnsavedChanges( true );
 
             sf->setArg( 1, QString( "%1" ).arg( latitude.Degrees() ) );
             if ( ! sf->argVal(0).isEmpty() )
                 sf->setValid( true );
             else
                 sf->setValid(false);
 
         }
         else
         {
             sf->setArg( 1, QString() );
             sf->setValid( false );
         }
     }
     else
     {
         warningMismatch( "setINDIGeoLocation" );
     }
 
 }
 
 void ScriptBuilder::slotINDIStartExposureTimeout()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "startINDIExposure" )
     {
 
         if (sf->argVal(0).toInt() != argStartExposureINDI->timeOut->value())
             setUnsavedChanges( true );
 
         sf->setArg(0, QString("%1").arg(argStartExposureINDI->timeOut->value()));
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "startINDIExposure" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetUTC()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIUTC" )
     {
 
         if (argSetUTCINDI->UTC->text().isEmpty())
         {
             sf->setValid(false);
             return;
         }
 
         if (sf->argVal(0) != argSetUTCINDI->UTC->text())
             setUnsavedChanges( true );
 
         sf->setArg(0, argSetUTCINDI->UTC->text());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIUTC" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetScopeAction()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIScopeAction" )
     {
 
         if (sf->argVal(0) != argSetScopeActionINDI->actionCombo->currentText())
             setUnsavedChanges( true );
 
         sf->setArg(0, argSetScopeActionINDI->actionCombo->currentText());
         sf->setINDIProperty("CHECK");
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIScopeAction" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetFrameType()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIFrameType" )
     {
 
         if (sf->argVal(0) != argSetFrameTypeINDI->typeCombo->currentText())
             setUnsavedChanges( true );
 
         sf->setArg(0, argSetFrameTypeINDI->typeCombo->currentText());
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIFrameType" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetCCDTemp()
 {
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDICCDTemp" )
     {
 
         if (sf->argVal(0).toInt() != argSetCCDTempINDI->temp->value())
             setUnsavedChanges( true );
 
         sf->setArg(0, QString("%1").arg(argSetCCDTempINDI->temp->value()));
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDICCDTemp" );
     }
 
 }
 
 void ScriptBuilder::slotINDISetFilterNum()
 {
 
     ScriptFunction * sf = ScriptList[ sb->ScriptListBox->currentRow() ];
 
     if ( sf->name() == "setINDIFilterNum" )
     {
 
         if (sf->argVal(0).toInt() != argSetFilterNumINDI->filter_num->value())
             setUnsavedChanges( true );
 
         sf->setArg(0, QString("%1").arg(argSetFilterNumINDI->filter_num->value()));
         sf->setValid(true);
     }
     else
     {
         warningMismatch( "setINDIFilterNum" );
     }
 
 
 }
 #endif
 
 void ScriptBuilder::warningMismatch(const QString &expected) const
 {
     qWarning() << i18n("Mismatch between function and Arg widget (expected %1.)", QString(expected));
 }
diff --git a/kstars/tools/starhopperdialog.cpp b/kstars/tools/starhopperdialog.cpp
index bc13a5e48..0908bd3e8 100644
--- a/kstars/tools/starhopperdialog.cpp
+++ b/kstars/tools/starhopperdialog.cpp
@@ -1,169 +1,169 @@
 /***************************************************************************
                starhopperdialog.cpp  -  UI of Star Hopping Guide for KStars
                              -------------------
     begin                : Sat 15th Nov 2014
     copyright            : (C) 2014 Utkarsh Simha
     email                : utkarshsimha@gmail.com
 ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "starhopperdialog.h"
 
 #include "kstars.h"
 #include "ksutils.h"
 #include "skymap.h"
 #include "skymapcomposite.h"
 #include "starhopper.h"
 #include "targetlistcomponent.h"
 #include "dialogs/detaildialog.h"
 
 StarHopperDialog::StarHopperDialog(QWidget *parent) : QDialog(parent), ui(new Ui::StarHopperDialog)
 {
     ui->setupUi(this);
     m_lw       = ui->listWidget;
     m_Metadata = new QStringList();
     ui->directionsLabel->setWordWrap(true);
     m_sh.reset(new StarHopper());
     connect(ui->NextButton, SIGNAL(clicked()), this, SLOT(slotNext()));
     connect(ui->GotoButton, SIGNAL(clicked()), this, SLOT(slotGoto()));
     connect(ui->DetailsButton, SIGNAL(clicked()), this, SLOT(slotDetails()));
     connect(m_lw, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(slotGoto()));
     connect(m_lw, SIGNAL(itemSelectionChanged()), this, SLOT(slotRefreshMetadata()));
     connect(this, SIGNAL(finished(int)), this, SLOT(deleteLater()));
 }
 
 StarHopperDialog::~StarHopperDialog()
 {
     TargetListComponent *t = getTargetListComponent();
 
     if (t->list)
         t->list->clear();
     SkyMap::Instance()->forceUpdate(true);
 }
 
 void StarHopperDialog::starHop(const SkyPoint &startHop, const SkyPoint &stopHop, float fov, float maglim)
 {
     QList<StarObject *> *starList = m_sh->computePath(startHop, stopHop, fov, maglim, m_Metadata);
 
     if (!starList->empty())
     {
         foreach (StarObject *so, *starList)
         {
             setData(so);
         }
         slotRefreshMetadata();
         m_skyObjList = KSUtils::castStarObjListToSkyObjList(starList);
         starList->clear();
         delete starList;
         TargetListComponent *t = getTargetListComponent();
         t->list.reset(m_skyObjList);
         SkyMap::Instance()->forceUpdate(true);
     }
     else
     {
         delete starList;
         KMessageBox::error(this, i18n("Star-hopper algorithm failed. If you're trying a large star hop, try using a "
                                       "smaller FOV or changing the source point"));
     }
 }
 
 void StarHopperDialog::setData(StarObject *sobj)
 {
     QListWidgetItem *item = new QListWidgetItem();
     QString starName;
 
     if (sobj->name() != "star")
     {
         starName = sobj->translatedLongName();
     }
     else if (sobj->getHDIndex())
     {
         starName = QString("HD%1").arg(QString::number(sobj->getHDIndex()));
     }
     else
     {
         starName = "";
         starName += sobj->spchar();
         starName += QString(" Star of mag %2").arg(QString::number(sobj->mag()));
     }
     item->setText(starName);
     QVariant qv;
 
     qv.setValue(sobj);
     item->setData(Qt::UserRole, qv);
     m_lw->addItem(item);
 }
 
 void StarHopperDialog::slotNext()
 {
     m_lw->setCurrentRow(m_lw->currentRow() + 1);
     slotGoto();
 }
 
 void StarHopperDialog::slotGoto()
 {
     slotRefreshMetadata();
     SkyObject *skyobj = getStarData(m_lw->currentItem());
 
     if (skyobj != nullptr)
     {
         KStars *ks = KStars::Instance();
         ks->map()->setClickedObject(skyobj);
         ks->map()->setClickedPoint(skyobj);
         ks->map()->slotCenter();
     }
 }
 
 void StarHopperDialog::slotDetails()
 {
     SkyObject *skyobj = getStarData(m_lw->currentItem());
 
     if (skyobj != nullptr)
     {
         DetailDialog *detailDialog =
             new DetailDialog(skyobj, KStarsData::Instance()->ut(), KStarsData::Instance()->geo(), KStars::Instance());
         detailDialog->exec();
         delete detailDialog;
     }
 }
 
 SkyObject *StarHopperDialog::getStarData(QListWidgetItem *item)
 {
     if (!item)
-        return 0;
+        return nullptr;
     else
     {
         QVariant v          = item->data(Qt::UserRole);
         StarObject *starobj = v.value<StarObject *>();
         return starobj;
     }
 }
 
 inline TargetListComponent *StarHopperDialog::getTargetListComponent()
 {
     return KStarsData::Instance()->skyComposite()->getStarHopRouteList();
 }
 
 void StarHopperDialog::slotRefreshMetadata()
 {
     int row = m_lw->currentRow();
 
     qDebug() << "Slot RefreshMetadata";
     if (row >= 0)
     {
         ui->directionsLabel->setText(m_Metadata->at(row));
     }
     else
     {
         ui->directionsLabel->setText(m_Metadata->at(0));
     }
     qDebug() << "Slot RefreshMetadata";
 }
diff --git a/kstars/tools/whatsinteresting/skyobjlistmodel.cpp b/kstars/tools/whatsinteresting/skyobjlistmodel.cpp
index ba4c82516..4e57081f7 100644
--- a/kstars/tools/whatsinteresting/skyobjlistmodel.cpp
+++ b/kstars/tools/whatsinteresting/skyobjlistmodel.cpp
@@ -1,92 +1,92 @@
 /***************************************************************************
                           skyobjlistmodel.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2012/26/05
     copyright            : (C) 2012 by Samikshan Bairagya
     email                : samikshan@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "skyobjlistmodel.h"
 
 #include "skyobject.h"
 #include "skyobjitem.h"
 
 SkyObjListModel::SkyObjListModel(SkyObjItem *soitem, QObject *parent) : QAbstractListModel(parent)
 {
     //FIXME Needs porting to KF5
     //Fixed in roleNames(). setRoleNames is not a member of QAbstractListModel anymore
     //setRoleNames(soitem->roleNames());
     Q_UNUSED(soitem);
 }
 
 QHash<int, QByteArray> SkyObjListModel::roleNames() const
 {
     QHash<int, QByteArray> roles;
     roles[SkyObjItem::DispNameRole]     = "dispName";
     roles[SkyObjItem::DispImageRole]    = "imageSource";
     roles[SkyObjItem::DispSummaryRole]  = "dispObjSummary";
     roles[SkyObjItem::CategoryRole]     = "type";
     roles[SkyObjItem::CategoryNameRole] = "typeName";
     return roles;
 }
 
 void SkyObjListModel::addSkyObject(SkyObjItem *soitem)
 {
     beginInsertRows(QModelIndex(), rowCount(), rowCount());
     m_SoItemList.append(soitem);
     endInsertRows();
 }
 
 int SkyObjListModel::rowCount(const QModelIndex &parent) const
 {
     Q_UNUSED(parent)
 
     return m_SoItemList.size();
 }
 
 QVariant SkyObjListModel::data(const QModelIndex &index, int role) const
 {
     if (index.row() < 0 || index.row() > rowCount())
         return QVariant();
 
     SkyObjItem *soitem = m_SoItemList[index.row()];
 
     return soitem->data(role);
 }
 
 QList<SkyObjItem *> SkyObjListModel::getSkyObjItems()
 {
     return m_SoItemList;
 }
 
 SkyObjItem *SkyObjListModel::getSkyObjItem(int index)
 {
     if (m_SoItemList.size() > index)
         return m_SoItemList[index];
     else
-        return 0;
+        return nullptr;
 }
 
 int SkyObjListModel::getSkyObjIndex(SkyObjItem *item)
 {
     for (int i = 0; i < m_SoItemList.size(); i++)
     {
         if (item->getName() == m_SoItemList[i]->getName())
             return i;
     }
     return -1;
 }
 
 void SkyObjListModel::resetModel()
 {
     m_SoItemList.clear();
 }
diff --git a/kstars/tools/whatsinteresting/wiview.cpp b/kstars/tools/whatsinteresting/wiview.cpp
index d5b2f9dee..f24cf4bcf 100644
--- a/kstars/tools/whatsinteresting/wiview.cpp
+++ b/kstars/tools/whatsinteresting/wiview.cpp
@@ -1,1019 +1,1019 @@
 /***************************************************************************
                           wiview.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : 2012/26/05
     copyright            : (C) 2012 by Samikshan Bairagya
     email                : samikshan@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "wiview.h"
 
 #include "kspaths.h"
 #include "kstars.h"
 #include "modelmanager.h"
 #include "obsconditions.h"
 #include "Options.h"
 #include "skymap.h"
 #include "skymapcomposite.h"
 #include "skyobjitem.h"
 #include "skyobjlistmodel.h"
 #include "starobject.h"
 #include "wiequipsettings.h"
 #include "dialogs/detaildialog.h"
 
 #include <klocalizedcontext.h>
 
 #include <QGraphicsObject>
 #include <QNetworkAccessManager>
 #include <QNetworkReply>
 #include <QQmlContext>
 #include <QQuickItem>
 #include <QQuickView>
 #include <QStandardPaths>
 #include <QtConcurrent>
 
 #ifdef HAVE_INDI
 #include <basedevice.h>
 #include "indi/indilistener.h"
 #endif
 
 WIView::WIView(QWidget *parent) : QWidget(parent)
 {
     //These settings are like this just to get it started.
     int bortle                           = Options::bortleClass();
     int aperture                         = 100;
     ObsConditions::Equipment equip       = ObsConditions::Telescope;
     ObsConditions::TelescopeType telType = ObsConditions::Reflector;
 
     m_Obs = new ObsConditions(bortle, aperture, equip, telType);
 
     m_ModManager.reset(new ModelManager(m_Obs));
 
     m_BaseView = new QQuickView();
 
     ///To use i18n() instead of qsTr() in qml/wiview.qml for translation
     //KDeclarative kd;
     // kd.setDeclarativeEngine(m_BaseView->engine());
     //kd.initialize();
     //kd.setupBindings();
 
     m_Ctxt = m_BaseView->rootContext();
 
     m_Ctxt->setContextProperty("soListModel",
                                m_ModManager->getTempModel()); // This is to avoid an error saying it doesn't exist.
 
     ///Use instead of KDeclarative
     m_Ctxt->setContextObject(new KLocalizedContext(m_BaseView));
 
     QString WI_Location;
 #if defined(Q_OS_OSX)
     WI_Location = QCoreApplication::applicationDirPath() + "/../Resources/data/tools/whatsinteresting/qml/wiview.qml";
     if (!QFileInfo(WI_Location).exists())
         WI_Location = KSPaths::locate(QStandardPaths::AppDataLocation, "tools/whatsinteresting/qml/wiview.qml");
 #elif defined(Q_OS_WIN)
     WI_Location = KSPaths::locate(QStandardPaths::GenericDataLocation, "tools/whatsinteresting/qml/wiview.qml");
 #else
     WI_Location = KSPaths::locate(QStandardPaths::AppDataLocation, "tools/whatsinteresting/qml/wiview.qml");
 #endif
 
     m_BaseView->setSource(QUrl::fromLocalFile(WI_Location));
 
     m_BaseObj = m_BaseView->rootObject();
 
     m_ProgressBar = m_BaseObj->findChild<QQuickItem *>("progressBar");
 
     m_loadingMessage = m_BaseObj->findChild<QQuickItem *>("loadingMessage");
 
     m_CategoryTitle = m_BaseObj->findChild<QQuickItem *>(QString("categoryTitle"));
 
     m_ViewsRowObj = m_BaseObj->findChild<QQuickItem *>(QString("viewsRowObj"));
     connect(m_ViewsRowObj, SIGNAL(categorySelected(QString)), this, SLOT(onCategorySelected(QString)));
     connect(m_ViewsRowObj, SIGNAL(inspectSkyObject(QString)), this, SLOT(inspectSkyObject(QString)));
 
     m_SoListObj = m_BaseObj->findChild<QQuickItem *>("soListObj");
     connect(m_SoListObj, SIGNAL(soListItemClicked(int)), this, SLOT(onSoListItemClicked(int)));
 
     m_DetailsViewObj = m_BaseObj->findChild<QQuickItem *>("detailsViewObj");
 
     descTextObj = m_DetailsViewObj->findChild<QObject *>("descTextObj");
     infoBoxText = m_DetailsViewObj->findChild<QObject *>("infoBoxText");
 
     m_NextObj = m_BaseObj->findChild<QQuickItem *>("nextObj");
     connect(m_NextObj, SIGNAL(nextObjClicked()), this, SLOT(onNextObjClicked()));
     m_PrevObj = m_BaseObj->findChild<QQuickItem *>("prevObj");
     connect(m_PrevObj, SIGNAL(prevObjClicked()), this, SLOT(onPrevObjClicked()));
 
     m_CenterButtonObj = m_BaseObj->findChild<QQuickItem *>("centerButtonObj");
     connect(m_CenterButtonObj, SIGNAL(centerButtonClicked()), this, SLOT(onCenterButtonClicked()));
 
     autoCenterCheckbox = m_DetailsViewObj->findChild<QObject *>("autoCenterCheckbox");
     autoTrackCheckbox  = m_DetailsViewObj->findChild<QObject *>("autoTrackCheckbox");
 
     m_SlewTelescopeButtonObj = m_BaseObj->findChild<QQuickItem *>("slewTelescopeButtonObj");
     connect(m_SlewTelescopeButtonObj, SIGNAL(slewTelescopeButtonClicked()), this, SLOT(onSlewTelescopeButtonClicked()));
 
     m_DetailsButtonObj = m_BaseObj->findChild<QQuickItem *>("detailsButtonObj");
     connect(m_DetailsButtonObj, SIGNAL(detailsButtonClicked()), this, SLOT(onDetailsButtonClicked()));
 
     QObject *settingsIconObj = m_BaseObj->findChild<QQuickItem *>("settingsIconObj");
     connect(settingsIconObj, SIGNAL(settingsIconClicked()), this, SLOT(onSettingsIconClicked()));
 
     inspectIconObj = m_BaseObj->findChild<QQuickItem *>("inspectIconObj");
     connect(inspectIconObj, SIGNAL(inspectIconClicked(bool)), this, SLOT(onInspectIconClicked(bool)));
 
     visibleIconObj = m_BaseObj->findChild<QQuickItem *>("visibleIconObj");
     connect(visibleIconObj, SIGNAL(visibleIconClicked(bool)), this, SLOT(onVisibleIconClicked(bool)));
 
     favoriteIconObj = m_BaseObj->findChild<QQuickItem *>("favoriteIconObj");
     connect(favoriteIconObj, SIGNAL(favoriteIconClicked(bool)), this, SLOT(onFavoriteIconClicked(bool)));
 
     QObject *reloadIconObj = m_BaseObj->findChild<QQuickItem *>("reloadIconObj");
     connect(reloadIconObj, SIGNAL(reloadIconClicked()), this, SLOT(onReloadIconClicked()));
 
     QObject *downloadIconObj = m_BaseObj->findChild<QQuickItem *>("downloadIconObj");
     connect(downloadIconObj, SIGNAL(downloadIconClicked()), this, SLOT(onUpdateIconClicked()));
 
     m_BaseView->setResizeMode(QQuickView::SizeRootObjectToView);
     m_BaseView->show();
 
     // Fix some weird issue with what's interesting panel view under Windows
     // In Qt 5.9 it content is messed up and there is no way to close the panel
     #ifdef Q_OS_WIN
         m_BaseView->setFlags(Qt::WindowCloseButtonHint);
     #endif
 
 
     connect(KStars::Instance()->map(), SIGNAL(objectClicked(SkyObject*)), this,
             SLOT(inspectSkyObjectOnClick(SkyObject*)));
 
     manager.reset(new QNetworkAccessManager());
 
     setProgressBarVisible(true);
     connect(m_ModManager.get(), SIGNAL(loadProgressUpdated(double)), this, SLOT(updateProgress(double)));
     connect(m_ModManager.get(), SIGNAL(modelUpdated()), this, SLOT(refreshListView()));
     m_ViewsRowObj->setProperty("enabled", false);
 
     inspectOnClick = false;
 
     nightVision = m_BaseObj->findChild<QObject *>("nightVision");
     if (Options::darkAppColors())
         nightVision->setProperty("state", "active");
 }
 
 WIView::~WIView()
 {
 }
 
 void WIView::setNightVisionOn(bool on)
 {
     if (on)
         nightVision->setProperty("state", "active");
     else
         nightVision->setProperty("state", "");
 
     if (m_CurSoItem != nullptr)
         loadDetailsView(m_CurSoItem, m_CurIndex);
 }
 
 void WIView::setProgressBarVisible(bool visible)
 {
     m_ProgressBar->setProperty("visible", visible);
 }
 
 void WIView::updateProgress(double value)
 {
     m_ProgressBar->setProperty("value", value);
 
     if (value == 1)
     {
         setProgressBarVisible(false);
         m_ViewsRowObj->setProperty("enabled", true);
         m_loadingMessage->setProperty("state", "");
     }
     else
     {
         setProgressBarVisible(true);
         m_loadingMessage->setProperty("state", "loading");
     }
 }
 
 void WIView::updateObservingConditions()
 {
     int bortle = Options::bortleClass();
 
     /**
     NOTE This part of the code dealing with equipment type is presently not required
     as WI does not differentiate between Telescope and Binoculars. It only needs the
      aperture of the equipment whichever available. However this is kept as a part of
     the code as support to be utilised in the future.
     **/
     ObsConditions::Equipment equip = ObsConditions::None;
 
     if (Options::telescopeCheck() && Options::binocularsCheck())
         equip = ObsConditions::Both;
     else if (Options::telescopeCheck())
         equip = ObsConditions::Telescope;
     else if (Options::binocularsCheck())
         equip = ObsConditions::Binoculars;
 
     ObsConditions::TelescopeType telType;
 
     if (KStars::Instance()->getWIEquipSettings())
         telType = (equip == ObsConditions::Telescope) ? KStars::Instance()->getWIEquipSettings()->getTelType() :
                                                         ObsConditions::Invalid;
     else
         telType = ObsConditions::Invalid;
 
     int aperture = 100;
 
     //This doesn't work correctly, FIXME!!
     // if(KStars::Instance()->getWIEquipSettings())
     //    aperture = KStars::Instance()->getWIEquipSettings()->getAperture();
 
     if (!m_Obs)
         m_Obs = new ObsConditions(bortle, aperture, equip, telType);
     else
         m_Obs->setObsConditions(bortle, aperture, equip, telType);
 }
 
 void WIView::onCategorySelected(QString model)
 {
     m_CurrentObjectListName = model;
     m_Ctxt->setContextProperty("soListModel", m_ModManager->returnModel(m_CurrentObjectListName));
     m_CurIndex = -2;
     if (!m_ModManager->showOnlyVisibleObjects())
         visibleIconObj->setProperty("state", "unchecked");
     if (!m_ModManager->showOnlyFavoriteObjects())
         favoriteIconObj->setProperty("state", "unchecked");
     if (model == "ngc" && (!m_ModManager->isNGCLoaded()))
     {
         QtConcurrent::run(m_ModManager.get(), &ModelManager::loadNGCCatalog);
         return;
     }
     if (model == "ic" && (!m_ModManager->isICLoaded()))
     {
         QtConcurrent::run(m_ModManager.get(), &ModelManager::loadICCatalog);
         return;
     }
     if (model == "sharpless" && (!m_ModManager->isSharplessLoaded()))
     {
         QtConcurrent::run(m_ModManager.get(), &ModelManager::loadSharplessCatalog);
         return;
     }
     updateModel(*m_Obs);
 }
 
 void WIView::onSoListItemClicked(int index)
 {
     SkyObjItem *soitem = m_ModManager->returnModel(m_CurrentObjectListName)->getSkyObjItem(index);
     if (soitem)
         loadDetailsView(soitem, index);
 }
 
 void WIView::onNextObjClicked()
 {
     if (!m_CurrentObjectListName.isEmpty())
     {
         int modelSize = m_ModManager->returnModel(m_CurrentObjectListName)->rowCount();
         SkyObjItem *nextItem =
             m_ModManager->returnModel(m_CurrentObjectListName)->getSkyObjItem((m_CurIndex + 1) % modelSize);
         loadDetailsView(nextItem, (m_CurIndex + 1) % modelSize);
     }
 }
 
 void WIView::onPrevObjClicked()
 {
     if (!m_CurrentObjectListName.isEmpty())
     {
         int modelSize = m_ModManager->returnModel(m_CurrentObjectListName)->rowCount();
         SkyObjItem *prevItem =
             m_ModManager->returnModel(m_CurrentObjectListName)->getSkyObjItem((m_CurIndex - 1 + modelSize) % modelSize);
         loadDetailsView(prevItem, (m_CurIndex - 1 + modelSize) % modelSize);
     }
 }
 
 void WIView::onCenterButtonClicked()
 {
     ///Center map on selected sky-object
     SkyObject *so  = m_CurSoItem->getSkyObject();
     KStars *kstars = KStars::Instance();
 
     if (so)
     {
         kstars->map()->setFocusPoint(so);
         kstars->map()->setFocusObject(so);
         kstars->map()->setDestination(*kstars->map()->focusPoint());
         Options::setIsTracking(autoTrackCheckbox->property("checked") == true);
     }
 }
 
 void WIView::onSlewTelescopeButtonClicked()
 {
     if (KMessageBox::Continue ==
         KMessageBox::warningContinueCancel(nullptr, "Are you sure you want your telescope to slew to this object?",
                                            i18n("Continue Slew"), KStandardGuiItem::cont(), KStandardGuiItem::cancel(),
                                            "continue_wi_slew_warning"))
     {
 #ifdef HAVE_INDI
 
         if (INDIListener::Instance()->size() == 0)
         {
             KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
             return;
         }
 
         foreach (ISD::GDInterface *gd, INDIListener::Instance()->getDevices())
         {
             INDI::BaseDevice *bd = gd->getBaseDevice();
 
             if (gd->getType() != KSTARS_TELESCOPE)
                 continue;
 
             if (bd == nullptr)
                 continue;
 
             if (bd->isConnected() == false)
             {
                 KMessageBox::error(
                     0, i18n("Telescope %1 is offline. Please connect and retry again.", gd->getDeviceName()));
                 return;
             }
 
             ISD::GDSetCommand SlewCMD(INDI_SWITCH, "ON_COORD_SET", "TRACK", ISS_ON, this);
 
             gd->setProperty(&SlewCMD);
             gd->runCommand(INDI_SEND_COORDS, m_CurSoItem->getSkyObject());
 
             /// Slew map to selected sky-object
             onCenterButtonClicked();
 
             return;
         }
 
         KMessageBox::sorry(0, i18n("KStars did not find any active telescopes."));
 
 #endif
     }
 }
 
 void WIView::onDetailsButtonClicked()
 {
     ///Code taken from WUTDialog::slotDetails()
     KStars *kstars = KStars::Instance();
     SkyObject *so  = m_CurSoItem->getSkyObject();
     if (so)
     {
         DetailDialog *detail = new DetailDialog(so, kstars->data()->lt(), kstars->data()->geo(), kstars);
         detail->exec();
         delete detail;
     }
 }
 
 void WIView::onSettingsIconClicked()
 {
     KStars *kstars = KStars::Instance();
     kstars->showWISettingsUI();
 }
 
 void WIView::onReloadIconClicked()
 {
     if (!m_CurrentObjectListName.isEmpty())
     {
         updateModel(*m_Obs);
         m_CurIndex = m_ModManager->returnModel(m_CurrentObjectListName)->getSkyObjIndex(m_CurSoItem);
     }
     loadDetailsView(m_CurSoItem, m_CurIndex);
 }
 
 void WIView::onVisibleIconClicked(bool visible)
 {
     m_ModManager->setShowOnlyVisibleObjects(visible);
     onReloadIconClicked();
 }
 
 void WIView::onFavoriteIconClicked(bool favorites)
 {
     m_ModManager->setShowOnlyFavoriteObjects(favorites);
     onReloadIconClicked();
 }
 
 void WIView::onUpdateIconClicked()
 {
     QMessageBox mbox;
     QPushButton *currentObject = mbox.addButton("Current Object", QMessageBox::AcceptRole);
     QPushButton *missingObjects = nullptr;
     QPushButton *allObjects = nullptr;
 
     mbox.setText("Please choose which object(s) to try to update with Wikipedia data.");
     if (!m_CurrentObjectListName.isEmpty())
     {
         missingObjects = mbox.addButton("Objects with no data", QMessageBox::AcceptRole);
         allObjects     = mbox.addButton("Entire List", QMessageBox::AcceptRole);
     }
     QPushButton *cancel = mbox.addButton("Cancel", QMessageBox::AcceptRole);
     mbox.setDefaultButton(cancel);
 
     mbox.exec();
     if (mbox.clickedButton() == currentObject)
     {
         if (m_CurSoItem != nullptr)
         {
             tryToUpdateWikipediaInfo(m_CurSoItem, getWikipediaName(m_CurSoItem));
         }
     }
     else if (mbox.clickedButton() == allObjects || mbox.clickedButton() == missingObjects)
     {
         SkyObjListModel *model = m_ModManager->returnModel(m_CurrentObjectListName);
         if (model->rowCount() > 0)
         {
             tryToUpdateWikipediaInfoInModel(mbox.clickedButton() == missingObjects);
         }
         else
         {
             qDebug() << "No Objects in List!";
         }
     }
 }
 
 void WIView::refreshListView()
 {
-    m_Ctxt->setContextProperty("soListModel", 0);
+    m_Ctxt->setContextProperty("soListModel", nullptr);
     if (!m_CurrentObjectListName.isEmpty())
         m_Ctxt->setContextProperty("soListModel", m_ModManager->returnModel(m_CurrentObjectListName));
     if (m_CurIndex == -2)
         onSoListItemClicked(0);
     if (m_CurIndex != -1)
         m_SoListObj->setProperty("currentIndex", m_CurIndex);
 }
 
 void WIView::updateModel(ObsConditions& obs)
 {
     if (!m_CurrentObjectListName.isEmpty())
     {
         m_Obs = &obs;
         m_ModManager->updateModel(m_Obs, m_CurrentObjectListName);
     }
 }
 
 void WIView::inspectSkyObject(const QString& name)
 {
     if (!name.isEmpty() && name != "star")
     {
         SkyObject *obj = KStarsData::Instance()->skyComposite()->findByName(name);
 
         if (obj)
             inspectSkyObject(obj);
     }
 }
 
 void WIView::inspectSkyObjectOnClick(SkyObject *obj)
 {
     if (inspectOnClick && KStars::Instance()->isWIVisible())
         inspectSkyObject(obj);
 }
 
 void WIView::inspectSkyObject(SkyObject *obj)
 {
     if (!obj)
         return;
 
     if (obj->name() != "star")
     {
         m_CurrentObjectListName = "";
         trackedItem.reset(new SkyObjItem(obj));
         loadDetailsView(trackedItem.get(), -1);
         m_BaseObj->setProperty("state", "singleItemSelected");
         m_CategoryTitle->setProperty("text", "Selected Object");
     }
 }
 
 void WIView::loadDetailsView(SkyObjItem *soitem, int index)
 {
     if (soitem == nullptr)
         return;
 
     int modelSize = -1;
 
     if (index != -1)
         modelSize = m_ModManager->returnModel(m_CurrentObjectListName)->rowCount();
 
     if (soitem != m_CurSoItem)
         m_CurSoItem = soitem;
 
     m_CurIndex  = index;
     if (modelSize <= 1)
     {
         m_NextObj->setProperty("visible", "false");
         m_PrevObj->setProperty("visible", "false");
     }
     else
     {
         SkyObjItem *nextItem =
             m_ModManager->returnModel(m_CurrentObjectListName)->getSkyObjItem((m_CurIndex + 1) % modelSize);
         SkyObjItem *prevItem =
             m_ModManager->returnModel(m_CurrentObjectListName)->getSkyObjItem((m_CurIndex - 1 + modelSize) % modelSize);
 
         m_NextObj->setProperty("visible", "true");
         m_PrevObj->setProperty("visible", "true");
         QObject *nextTextObj = m_NextObj->findChild<QObject *>("nextTextObj");
 
         nextTextObj->setProperty("text", nextItem->getName());
         QObject *prevTextObj = m_PrevObj->findChild<QObject *>("prevTextObj");
 
         prevTextObj->setProperty("text", prevItem->getName());
     }
 
     QObject *sonameObj      = m_DetailsViewObj->findChild<QObject *>("sonameObj");
     QObject *posTextObj     = m_DetailsViewObj->findChild<QObject *>("posTextObj");
     QObject *detailImage    = m_DetailsViewObj->findChild<QObject *>("detailImage");
     QObject *detailsTextObj = m_DetailsViewObj->findChild<QObject *>("detailsTextObj");
 
     sonameObj->setProperty("text", soitem->getDescName());
     posTextObj->setProperty("text", soitem->getPosition());
     detailImage->setProperty("refreshableSource", soitem->getImageURL(false));
 
     loadObjectDescription(soitem);
 
     infoBoxText->setProperty(
         "text",
         "<BR><BR>No Wikipedia information. <BR>  Please try to download it using the orange download button below.");
     loadObjectInfoBox(soitem);
 
     QString summary = soitem->getSummary(false);
 
     QString magText;
     if (soitem->getType() == SkyObjItem::Constellation)
         magText = xi18n("Magnitude:  --");
     else
         magText = xi18n("Magnitude: %1", QLocale().toString(soitem->getMagnitude(), 'f', 2));
 
     QString sbText = xi18n("Surface Brightness: %1", soitem->getSurfaceBrightness());
 
     QString sizeText = xi18n("Size: %1", soitem->getSize());
 
     QString details = summary + "<BR>" + sbText + "<BR>" + magText + "<BR>" + sizeText;
     detailsTextObj->setProperty("text", details);
 
     if (autoCenterCheckbox->property("checked") == true)
     {
         QTimer::singleShot(500, this, SLOT(onCenterButtonClicked()));
     }
 
     if (m_CurIndex != -1)
         m_SoListObj->setProperty("currentIndex", m_CurIndex);
 }
 
 QString WIView::getWikipediaName(SkyObjItem *soitem)
 {
     if (!soitem)
         return "";
 
     QString name;
 
     if (soitem->getName().toLower().startsWith(QLatin1String("m ")))
         name = soitem->getName().replace("M ", "Messier_").remove(' ');
     else if (soitem->getName().toLower().startsWith(QLatin1String("ngc")))
         name = soitem->getName().toLower().replace("ngc", "NGC_").remove(' ');
     else if (soitem->getName().toLower().startsWith(QLatin1String("ic")))
         name = soitem->getName().toLower().replace("ic", "IC_").remove(' ');
     else if (soitem->getType() == SkyObjItem::Constellation)
     {
         QStringList words = soitem->getName().split(" ");
         for (int i = 0; i < words.size(); i++)
         {
             QString temp = words.at(i).toLower();
             temp[0]      = temp[0].toUpper();
             words.replace(i, temp);
         }
         name = words.join("_") + "_(constellation)";
         if (name.contains("Serpens"))
             name = "Serpens_(constellation)";
     }
     else if (soitem->getTypeName() == "Asteroid")
         name = soitem->getName().remove(' ') + "_(asteroid)";
     else if (soitem->getTypeName() == "Comet")
         name = soitem->getLongName();
     else if (soitem->getType() == SkyObjItem::Planet && soitem->getName() != "Sun" && soitem->getName() != "Moon")
         name = soitem->getName().remove(' ') + "_(planet)";
     else if (soitem->getType() == SkyObjItem::Star)
     {
         StarObject *star = dynamic_cast<StarObject *>(soitem->getSkyObject());
 
         // The greek name seems to give the most consistent search results for opensearch.
         name             = star->gname(false).replace(' ', '_');
         if (name.isEmpty())
             name = soitem->getName().replace(' ', '_') + "_(star)";
         name.remove('[').remove(']');
     }
     else
         name = soitem->getName().remove(' ');
 
     return name;
 }
 
 void WIView::updateWikipediaDescription(SkyObjItem *soitem)
 {
     if (!soitem)
         return;
 
     QString name = getWikipediaName(soitem);
 
     QUrl url("https://en.wikipedia.org/w/api.php?action=opensearch&search=" + name + "&format=xml");
 
     QNetworkReply *response = manager->get(QNetworkRequest(url));
     QTimer::singleShot(30000, response, [response] { //Shut it down after 30 sec.
         response->abort();
         response->deleteLater();
         qDebug() << "Wikipedia Download Timed out.";
     });
     connect(response, &QNetworkReply::finished, this, [soitem, this, response] {
         response->deleteLater();
         if (response->error() != QNetworkReply::NoError)
             return;
         QString contentType = response->header(QNetworkRequest::ContentTypeHeader).toString();
         if (!contentType.contains("charset=utf-8"))
         {
             qWarning() << "Content charsets other than utf-8 are not implemented yet.";
             return;
         }
         QString result = QString::fromUtf8(response->readAll());
         int leftPos    = result.indexOf("<Description") + 34;
         if (leftPos < 34)
             return;
         int rightPos = result.indexOf("</Description>") - leftPos;
 
         int leftURL  = result.indexOf("<Url xml:space=\"preserve\">") + 26;
         int rightURL = result.indexOf("</Url>") - leftURL;
 
         QString srchtml =
             "\n<p style=text-align:right>Source: (<a href='" + result.mid(leftURL, rightURL) + "'>" +
             "Wikipedia</a>)"; //Note the \n is so that the description is put on another line in the file.  Doesn't affect the display but allows the source to be loaded in the details but not the list.
         QString html = "<HTML>" + result.mid(leftPos, rightPos) + srchtml + "</HTML>";
 
         saveObjectInfoBoxText(soitem, "description", html);
 
         QString color     = (Options::darkAppColors()) ? "red" : "white";
         QString linkColor = (Options::darkAppColors()) ? "red" : "yellow";
         html              = "<HTML><HEAD><style type=text/css>body {color:" + color +
                ";} a {text-decoration: none;color:" + linkColor + ";}</style></HEAD><BODY>" + html + "</BODY></HTML>";
 
         if (soitem == m_CurSoItem)
             descTextObj->setProperty("text", html);
         refreshListView();
     });
 }
 
 void WIView::loadObjectDescription(SkyObjItem *soitem)
 {
     QFile file;
     QString fname = "description-" + soitem->getName().toLower().remove(' ') + ".html";
     file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "descriptions/" +
                      fname); //determine filename in local user KDE directory tree.
 
     if (file.exists())
     {
         if (file.open(QIODevice::ReadOnly))
         {
             QTextStream in(&file);
             QString color     = (Options::darkAppColors()) ? "red" : "white";
             QString linkColor = (Options::darkAppColors()) ? "red" : "yellow";
             QString line      = "<HTML><HEAD><style type=text/css>body {color:" + color +
                            ";} a {text-decoration: none;color:" + linkColor + ";}</style></HEAD><BODY><BR>" +
                            in.readAll() + "</BODY></HTML>";
             descTextObj->setProperty("text", line);
             file.close();
         }
     }
     else
     {
         descTextObj->setProperty("text", soitem->getTypeName());
     }
 }
 
 void WIView::loadObjectInfoBox(SkyObjItem *soitem)
 {
     if (!soitem)
         return;
     QFile file;
     QString fname = "infoText-" + soitem->getName().toLower().remove(' ') + ".html";
     file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "descriptions/" +
                      fname); //determine filename in local user KDE directory tree.
 
     if (file.exists())
     {
         if (file.open(QIODevice::ReadOnly))
         {
             QTextStream in(&file);
             QString infoBoxHTML;
             while (!in.atEnd())
             {
                 infoBoxHTML = in.readAll();
                 QString wikiImageName =
                     QUrl::fromLocalFile(
                         KSPaths::locate(QStandardPaths::GenericDataLocation,
                                         "descriptions/wikiImage-" + soitem->getName().toLower().remove(' ') + ".png"))
                         .url();
                 if (!wikiImageName.isEmpty())
                 {
                     int captionEnd = infoBoxHTML.indexOf(
                         "</caption>"); //Start looking for the image AFTER the caption.  Planets have images in their caption.
                     if (captionEnd == -1)
                         captionEnd = 0;
                     int leftImg    = infoBoxHTML.indexOf("src=\"", captionEnd) + 5;
                     int rightImg   = infoBoxHTML.indexOf("\"", leftImg) - leftImg;
                     QString imgURL = infoBoxHTML.mid(leftImg, rightImg);
                     infoBoxHTML.replace(imgURL, wikiImageName);
                 }
                 QString color     = (Options::darkAppColors()) ? "red" : "white";
                 QString linkColor = (Options::darkAppColors()) ? "red" : "yellow";
                 if (Options::darkAppColors())
                     infoBoxHTML.replace("color: white", "color: " + color);
                 infoBoxHTML = "<HTML><HEAD><style type=text/css>body {color:" + color +
                               ";} a {text-decoration: none;color:" + linkColor + ";}</style></HEAD><BODY>" +
                               infoBoxHTML + "</BODY></HTML>";
 
                 infoBoxText->setProperty("text", infoBoxHTML);
             }
             file.close();
         }
     }
 }
 
 void WIView::tryToUpdateWikipediaInfoInModel(bool onlyMissing)
 {
     SkyObjListModel *model = m_ModManager->returnModel(m_CurrentObjectListName);
     int objectNum          = model->rowCount();
     for (int i = 0; i < objectNum; i++)
     {
         SkyObjItem *soitem = model->getSkyObjItem(i);
         QFile file;
         QString fname = "infoText-" + soitem->getName().toLower().remove(' ') + ".html";
         file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "descriptions/" +
                          fname); //determine filename in local user KDE directory tree.
 
         if (file.exists() && onlyMissing)
             continue;
 
         tryToUpdateWikipediaInfo(soitem, getWikipediaName(soitem));
     }
 }
 
 void WIView::tryToUpdateWikipediaInfo(SkyObjItem *soitem, QString name)
 {
     if (name.isEmpty() || !soitem)
         return;
 
     QUrl url("https://en.wikipedia.org/w/index.php?action=render&title=" + name + "&redirects");
     QNetworkReply *response = manager->get(QNetworkRequest(url));
 
     QTimer::singleShot(30000, response, [response] { //Shut it down after 30 sec.
         response->abort();
         response->deleteLater();
         qDebug() << "Wikipedia Download Timed out.";
     });
     connect(response, &QNetworkReply::finished, this, [name, response, soitem, this] {
         response->deleteLater();
         if (response->error() == QNetworkReply::ContentNotFoundError)
         {
             QString html = "<BR>Sorry, No Wikipedia article with this object name seems to exist.  It is possible that "
                            "one does exist but does not match the namimg scheme.";
             saveObjectInfoBoxText(soitem, "infoText", html);
             infoBoxText->setProperty("text", html);
             return;
         }
         if (response->error() != QNetworkReply::NoError)
             return;
         QString result = QString::fromUtf8(response->readAll());
         int leftPos    = result.indexOf("<table class=\"infobox");
         int rightPos   = result.indexOf("</table>", leftPos) - leftPos;
 
         if (leftPos == -1)
         { //No InfoBox is Found
             if (soitem->getType() == SkyObjItem::Star &&
                 name != soitem->getName().replace(' ', '_')) //For stars, the regular name rather than gname
             {
                 tryToUpdateWikipediaInfo(soitem, soitem->getName().replace(' ', '_'));
                 return;
             }
             QString html = "<BR>Sorry, no Information Box in the object's Wikipedia article was found.";
             saveObjectInfoBoxText(soitem, "infoText", html);
             infoBoxText->setProperty("text", html);
             return;
         }
 
         updateWikipediaDescription(soitem);
 
         QString infoText = result.mid(leftPos, rightPos);
 
         //This if statement should correct for a situation like for the planets where there is a single internal table inside the infoText Box.
         if (infoText.indexOf("<table", leftPos + 6) != -1)
         {
             rightPos = result.indexOf("</table>", leftPos + rightPos + 6) - leftPos;
             infoText = result.mid(leftPos, rightPos);
         }
 
         //This next section is for the headers in the colored boxes. It turns them black instead of white because they are more visible that way.
         infoText.replace("background: #", "color:black;background: #")
             .replace("background-color: #", "color:black;background: #")
             .replace("background:#", "color:black;background:#")
             .replace("background-color:#", "color:black;background:#")
             .replace("background: pink", "color:black;background: pink");
         infoText.replace("//", "http://"); //This is to fix links on wikipedia which are missing http from the url
         infoText.replace("https:http:", "https:")
             .replace("http:http:", "http:"); //Just in case it was done to an actual complete url
 
         //This section is intended to remove links from the object name header at the top.  The links break up the header.
         int thLeft = infoText.indexOf("<th ");
         if (thLeft != -1)
         {
             int thRight = infoText.indexOf("</th>", thLeft);
             int firstA  = infoText.indexOf("<a ", thLeft);
             if (firstA != -1 && firstA < thRight)
             {
                 int rightA = infoText.indexOf(">", firstA) - firstA + 1;
                 infoText.remove(firstA, rightA);
                 int endA = infoText.indexOf("</a>", firstA);
                 infoText.remove(endA, 4);
             }
         }
 
         int annotationLeft  = infoText.indexOf("<annotation");
         int annotationRight = infoText.indexOf("</annotation>", annotationLeft) + 13 - annotationLeft;
         infoText.remove(annotationLeft,
                         annotationRight); //This removes the annotation that does not render correctly for some DSOs.
 
         int mathLeft  = infoText.indexOf("<img src=\"https://wikimedia.org/api/rest_v1/media/math");
         int mathRight = infoText.indexOf(">", mathLeft) + 1 - mathLeft;
         infoText.remove(mathLeft, mathRight); //This removes an image that doesn't render properly for some DSOs.
 
         infoText.replace("style=\"width:22em\"", "style=\"width:100%;background-color: black;color: white;\"");
         infoText = infoText + "<BR>(Source: <a href='" + "https://en.wikipedia.org/w/index.php?title=" + name +
                    "&redirects" + "'>Wikipedia</a>)";
         saveInfoURL(soitem, "https://en.wikipedia.org/w/index.php?title=" + name + "&redirects");
 
         int captionEnd = infoText.indexOf(
             "</caption>"); //Start looking for the image AFTER the caption.  Planets have images in their caption.
         if (captionEnd == -1)
             captionEnd = 0;
         int leftImg = infoText.indexOf("src=\"", captionEnd) + 5;
         if (leftImg > captionEnd + 5)
         {
             int rightImg   = infoText.indexOf("\"", leftImg) - leftImg;
             QString imgURL = infoText.mid(leftImg, rightImg);
             imgURL.replace(
                 "http://upload.wikimedia.org",
                 "https://upload.wikimedia.org"); //Although they will display, the images apparently don't download properly unless they are https.
             saveImageURL(soitem, imgURL);
             downloadWikipediaImage(soitem, imgURL);
         }
 
         QString html = "<CENTER>" + infoText + "</table></CENTER>";
 
         saveObjectInfoBoxText(soitem, "infoText", html);
         QString color     = (Options::darkAppColors()) ? "red" : "white";
         QString linkColor = (Options::darkAppColors()) ? "red" : "yellow";
         if (Options::darkAppColors())
             html.replace("color: white", "color: " + color);
         html = "<HTML><HEAD><style type=text/css>body {color:" + color +
                ";} a {text-decoration: none;color:" + linkColor + ";}</style></HEAD><BODY>" + html + "</BODY></HTML>";
         if (soitem == m_CurSoItem)
             infoBoxText->setProperty("text", html);
     });
 }
 
 void WIView::saveObjectInfoBoxText(SkyObjItem *soitem, QString type, QString text)
 {
     QFile file;
     QString fname = type + '-' + soitem->getName().toLower().remove(' ') + ".html";
 
     QDir writableDir;
     QString filePath = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "descriptions";
     writableDir.mkpath(filePath);
 
     file.setFileName(filePath + '/' + fname); //determine filename in local user KDE directory tree.
 
     if (file.open(QIODevice::WriteOnly) == false)
     {
         qDebug() << "Image text cannot be saved for later.  file save error";
         return;
     }
     else
     {
         QTextStream stream(&file);
         stream << text;
         file.close();
     }
 }
 
 void WIView::saveImageURL(SkyObjItem *soitem, QString imageURL)
 {
     QFile file;
     file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) +
                      "image_url.dat"); //determine filename in local user KDE directory tree.
     QString entry = soitem->getName() + ':' + "Show Wikipedia Image" + ':' + imageURL;
 
     if (file.open(QIODevice::ReadOnly))
     {
         QTextStream in(&file);
         QString line;
         while (!in.atEnd())
         {
             line = in.readLine();
             if (line == entry)
             {
                 file.close();
                 return;
             }
         }
         file.close();
     }
 
     if (!file.open(QIODevice::ReadWrite | QIODevice::Append))
     {
         qDebug() << "Image URL cannot be saved for later.  image_url.dat error";
         return;
     }
     else
     {
         QTextStream stream(&file);
         stream << entry << endl;
         file.close();
     }
 }
 
 void WIView::saveInfoURL(SkyObjItem *soitem, QString infoURL)
 {
     QFile file;
     file.setFileName(KSPaths::writableLocation(QStandardPaths::GenericDataLocation) +
                      "info_url.dat"); //determine filename in local user KDE directory tree.
     QString entry = soitem->getName() + ':' + "Wikipedia Page" + ':' + infoURL;
 
     if (file.open(QIODevice::ReadOnly))
     {
         QTextStream in(&file);
         QString line;
         while (!in.atEnd())
         {
             line = in.readLine();
             if (line == entry)
             {
                 file.close();
                 return;
             }
         }
         file.close();
     }
 
     if (!file.open(QIODevice::ReadWrite | QIODevice::Append))
     {
         qDebug() << "Info URL cannot be saved for later.  info_url.dat error";
         return;
     }
     else
     {
         QTextStream stream(&file);
         stream << entry << endl;
         file.close();
     }
 }
 
 void WIView::downloadWikipediaImage(SkyObjItem *soitem, QString imageURL)
 {
     QString fname = "wikiImage-" + soitem->getName().toLower().remove(' ') + ".png";
 
     QDir writableDir;
     QString filePath = KSPaths::writableLocation(QStandardPaths::GenericDataLocation) + "descriptions";
     writableDir.mkpath(filePath);
 
     QString fileN = filePath + '/' + fname;
 
     QNetworkReply *response = manager->get(QNetworkRequest(QUrl(imageURL)));
     QTimer::singleShot(60000, response, [response] { //Shut it down after 60 sec.
         response->abort();
         response->deleteLater();
         qDebug() << "Image Download Timed out.";
     });
     connect(response, &QNetworkReply::finished, this, [fileN, response, this] {
         response->deleteLater();
         if (response->error() != QNetworkReply::NoError)
             return;
         QImage *image           = new QImage();
         QByteArray responseData = response->readAll();
         if (image->loadFromData(responseData))
         {
             image->save(fileN);
             refreshListView(); //This is to update the images displayed with the new image.
         }
         else
             qDebug() << "image not downloaded";
     });
 }
diff --git a/kstars/tools/wutdialog.cpp b/kstars/tools/wutdialog.cpp
index dc85bdc48..4b70f1c12 100644
--- a/kstars/tools/wutdialog.cpp
+++ b/kstars/tools/wutdialog.cpp
@@ -1,628 +1,628 @@
 /***************************************************************************
                           wutdialog.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Die Feb 25 2003
     copyright            : (C) 2003 by Thomas Kabelmann
     email                : tk78@gmx.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "wutdialog.h"
 
 #include "kstars.h"
 #include "skymap.h"
 #include "dialogs/detaildialog.h"
 #include "dialogs/locationdialog.h"
 #include "dialogs/timedialog.h"
 #include "skyobjects/kssun.h"
 #include "skyobjects/ksmoon.h"
 #include "skycomponents/skymapcomposite.h"
 #include "tools/observinglist.h"
 
 WUTDialogUI::WUTDialogUI(QWidget *p) : QFrame(p)
 {
     setupUi(this);
 }
 
 WUTDialog::WUTDialog(QWidget *parent, bool _session, GeoLocation *_geo, KStarsDateTime _lt)
     : QDialog(parent), session(_session), T0(_lt), geo(_geo)
 {
 #ifdef Q_OS_OSX
     setWindowFlags(Qt::Tool | Qt::WindowStaysOnTopHint);
 #endif
     WUT = new WUTDialogUI(this);
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
 
     mainLayout->addWidget(WUT);
     setLayout(mainLayout);
 
     setWindowTitle(i18n("What's up Tonight"));
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     mainLayout->addWidget(buttonBox);
     connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
     setModal(false);
 
     //If the Time is earlier than 6:00 am, assume the user wants the night of the previous date
     if (T0.time().hour() < 6)
         T0 = T0.addDays(-1);
 
     //Now, set time T0 to midnight (of the following day)
     T0.setTime(QTime(0, 0, 0));
     T0  = T0.addDays(1);
     UT0 = geo->LTtoUT(T0);
 
     //Set the Tomorrow date/time to Noon the following day
     Tomorrow   = T0.addSecs(12 * 3600);
     TomorrowUT = geo->LTtoUT(Tomorrow);
 
     //Set the Evening date/time to 6:00 pm
     Evening   = T0.addSecs(-6 * 3600);
     EveningUT = geo->LTtoUT(Evening);
 
     QString sGeo = geo->translatedName();
     if (!geo->translatedProvince().isEmpty())
         sGeo += ", " + geo->translatedProvince();
     sGeo += ", " + geo->translatedCountry();
     WUT->LocationLabel->setText(i18n("at %1", sGeo));
     WUT->DateLabel->setText(i18n("The night of %1", QLocale().toString(Evening.date(), QLocale::LongFormat)));
     m_Mag = 10.0;
     WUT->MagnitudeEdit->setValue(m_Mag);
     //WUT->MagnitudeEdit->setSliderEnabled( true );
     WUT->MagnitudeEdit->setSingleStep(0.100);
     initCategories();
 
     makeConnections();
 
     QTimer::singleShot(0, this, SLOT(init()));
 }
 
 WUTDialog::~WUTDialog()
 {
 }
 
 void WUTDialog::makeConnections()
 {
     connect(WUT->DateButton, SIGNAL(clicked()), SLOT(slotChangeDate()));
     connect(WUT->LocationButton, SIGNAL(clicked()), SLOT(slotChangeLocation()));
     connect(WUT->CenterButton, SIGNAL(clicked()), SLOT(slotCenter()));
     connect(WUT->DetailButton, SIGNAL(clicked()), SLOT(slotDetails()));
     connect(WUT->ObslistButton, SIGNAL(clicked()), SLOT(slotObslist()));
     connect(WUT->CategoryListWidget, SIGNAL(currentTextChanged(QString)), SLOT(slotLoadList(QString)));
     connect(WUT->ObjectListWidget, SIGNAL(currentTextChanged(QString)), SLOT(slotDisplayObject(QString)));
     connect(WUT->EveningMorningBox, SIGNAL(activated(int)), SLOT(slotEveningMorning(int)));
     connect(WUT->MagnitudeEdit, SIGNAL(valueChanged(double)), SLOT(slotChangeMagnitude()));
 }
 
 void WUTDialog::initCategories()
 {
     m_Categories << i18n("Planets") << i18n("Stars") << i18n("Nebulae") << i18n("Galaxies") << i18n("Star Clusters")
                  << i18n("Constellations") << i18n("Asteroids") << i18n("Comets");
 
     foreach (const QString &c, m_Categories)
         WUT->CategoryListWidget->addItem(c);
 
     WUT->CategoryListWidget->setCurrentRow(0);
 }
 
 void WUTDialog::init()
 {
     QString sRise, sSet, sDuration;
     float Dur;
     int hDur, mDur;
     KStarsData *data = KStarsData::Instance();
     // reset all lists
     foreach (const QString &c, m_Categories)
     {
         if (m_VisibleList.contains(c))
             visibleObjects(c).clear();
         else
             m_VisibleList[c] = QList<const SkyObject *>();
 
         m_CategoryInitialized[c] = false;
     }
 
     // sun almanac information
     KSSun *oSun     = dynamic_cast<KSSun *>(data->objectNamed("Sun"));
     sunRiseTomorrow = oSun->riseSetTime(TomorrowUT, geo, true);
     sunSetToday     = oSun->riseSetTime(EveningUT, geo, false);
     sunRiseToday    = oSun->riseSetTime(EveningUT, geo, true);
 
     //check to see if Sun is circumpolar
     KSNumbers *num    = new KSNumbers(UT0.djd());
     KSNumbers *oldNum = new KSNumbers(data->ut().djd());
     CachingDms LST    = geo->GSTtoLST(T0.gst());
 
     oSun->updateCoords(num, true, geo->lat(), &LST, true);
     if (oSun->checkCircumpolar(geo->lat()))
     {
         if (oSun->alt().Degrees() > 0.0)
         {
             sRise     = i18n("circumpolar");
             sSet      = i18n("circumpolar");
             sDuration = "00:00";
             Dur = hDur = mDur = 0;
         }
         else
         {
             sRise     = i18n("does not rise");
             sSet      = i18n("does not rise");
             sDuration = "24:00";
             Dur = hDur = 24;
             mDur       = 0;
         }
     }
     else
     {
         //Round times to the nearest minute by adding 30 seconds to the time
         sRise = QLocale().toString(sunRiseTomorrow);
         sSet  = QLocale().toString(sunSetToday);
 
         Dur = 24.0 + (float)sunRiseTomorrow.hour() + (float)sunRiseTomorrow.minute() / 60.0 +
               (float)sunRiseTomorrow.second() / 3600.0 - (float)sunSetToday.hour() -
               (float)sunSetToday.minute() / 60.0 - (float)sunSetToday.second() / 3600.0;
         hDur = int(Dur);
         mDur = int(60.0 * (Dur - (float)hDur));
         QTime tDur(hDur, mDur);
         sDuration = QLocale().toString(tDur);
     }
 
     WUT->SunSetLabel->setText(i18nc("Sunset at time %1 on date %2", "Sunset: %1 on %2", sSet,
                                     QLocale().toString(Evening.date(), QLocale::LongFormat)));
     WUT->SunRiseLabel->setText(i18nc("Sunrise at time %1 on date %2", "Sunrise: %1 on %2", sRise,
                                      QLocale().toString(Tomorrow.date(), QLocale::LongFormat)));
     if (Dur == 0)
         WUT->NightDurationLabel->setText(i18n("Night duration: %1", sDuration));
     else if (Dur > 1)
         WUT->NightDurationLabel->setText(i18n("Night duration: %1 hours", sDuration));
     else if (Dur == 1)
         WUT->NightDurationLabel->setText(i18n("Night duration: %1 hour", sDuration));
     else if (mDur > 1)
         WUT->NightDurationLabel->setText(i18n("Night duration: %1 minutes", sDuration));
     else if (mDur == 1)
         WUT->NightDurationLabel->setText(i18n("Night duration: %1 minute", sDuration));
 
     // moon almanac information
     KSMoon *oMoon = dynamic_cast<KSMoon *>(data->objectNamed("Moon"));
     moonRise      = oMoon->riseSetTime(UT0, geo, true);
     moonSet       = oMoon->riseSetTime(UT0, geo, false);
 
     //check to see if Moon is circumpolar
     oMoon->updateCoords(num, true, geo->lat(), &LST, true);
     if (oMoon->checkCircumpolar(geo->lat()))
     {
         if (oMoon->alt().Degrees() > 0.0)
         {
             sRise = i18n("circumpolar");
             sSet  = i18n("circumpolar");
         }
         else
         {
             sRise = i18n("does not rise");
             sSet  = i18n("does not rise");
         }
     }
     else
     {
         //Round times to the nearest minute by adding 30 seconds to the time
         sRise = QLocale().toString(moonRise.addSecs(30));
         sSet  = QLocale().toString(moonSet.addSecs(30));
     }
 
     WUT->MoonRiseLabel->setText(
         i18n("Moon rises at: %1 on %2", sRise, QLocale().toString(Evening.date(), QLocale::LongFormat)));
 
     // If the moon rises and sets on the same day, this will be valid [ Unless
     // the moon sets on the next day after staying on for over 24 hours ]
 
     if (moonSet > moonRise)
         WUT->MoonSetLabel->setText(
             i18n("Moon sets at: %1 on %2", sSet, QLocale().toString(Evening.date(), QLocale::LongFormat)));
     else
         WUT->MoonSetLabel->setText(
             i18n("Moon sets at: %1 on %2", sSet, QLocale().toString(Tomorrow.date(), QLocale::LongFormat)));
-    oMoon->findPhase(0);
+    oMoon->findPhase(nullptr);
     WUT->MoonIllumLabel->setText(oMoon->phaseName() + QString(" (%1%)").arg(int(100.0 * oMoon->illum())));
 
     //Restore Sun's and Moon's coordinates, and recompute Moon's original Phase
     oMoon->updateCoords(oldNum, true, geo->lat(), data->lst(), true);
     oSun->updateCoords(oldNum, true, geo->lat(), data->lst(), true);
-    oMoon->findPhase(0);
+    oMoon->findPhase(nullptr);
 
     if (WUT->CategoryListWidget->currentItem())
         slotLoadList(WUT->CategoryListWidget->currentItem()->text());
 
     delete num;
     delete oldNum;
 }
 
 QList<const SkyObject *> &WUTDialog::visibleObjects(const QString &category)
 {
     return m_VisibleList[category];
 }
 
 bool WUTDialog::isCategoryInitialized(const QString &category)
 {
     return m_CategoryInitialized[category];
 }
 
 void WUTDialog::slotLoadList(const QString &c)
 {
     KStarsData *data = KStarsData::Instance();
     if (!m_VisibleList.contains(c))
         return;
 
     WUT->ObjectListWidget->clear();
     setCursor(QCursor(Qt::WaitCursor));
 
     if (!isCategoryInitialized(c))
     {
         if (c == m_Categories[0]) //Planets
         {
             foreach (const QString &name, data->skyComposite()->objectNames(SkyObject::PLANET))
             {
                 SkyObject *o = data->skyComposite()->findByName(name);
 
                 if (checkVisibility(o) && o->mag() <= m_Mag)
                     visibleObjects(c).append(o);
             }
 
             m_CategoryInitialized[c] = true;
         }
 
         else if (c == m_Categories[1]) //Stars
         {
 
             QVector<QPair<QString, const SkyObject *>> starObjects;
             starObjects.append(data->skyComposite()->objectLists(SkyObject::STAR));
             starObjects.append(data->skyComposite()->objectLists(SkyObject::CATALOG_STAR));
 
             for (QVector<QPair<QString, const SkyObject *>>::iterator it = starObjects.begin();it != starObjects.end();it++)
             {
                const SkyObject *o =  it->second;
                if (checkVisibility(o) && o->mag() <= m_Mag)
                {
                    visibleObjects(c).append(o);
                }
             }
             m_CategoryInitialized[c] = true;
         }
 
         else if (c == m_Categories[5]) //Constellations
         {
             foreach (SkyObject *o, data->skyComposite()->constellationNames())
                 if (checkVisibility(o))
                     visibleObjects(c).append(o);
 
             m_CategoryInitialized[c] = true;
         }
 
         else if (c == m_Categories[6]) //Asteroids
         {
             foreach (SkyObject *o, data->skyComposite()->asteroids())
                 if (checkVisibility(o) && o->name() != i18n("Pluto") && o->mag() <= m_Mag)
                     visibleObjects(c).append(o);
 
             m_CategoryInitialized[c] = true;
         }
 
         else if (c == m_Categories[7]) //Comets
         {
             foreach (SkyObject *o, data->skyComposite()->comets())
                 if (checkVisibility(o) && o->mag() <= m_Mag)
                     visibleObjects(c).append(o);
 
             m_CategoryInitialized[c] = true;
         }
 
         else //all deep-sky objects, need to split clusters, nebulae and galaxies
         {
             foreach (DeepSkyObject *dso, data->skyComposite()->deepSkyObjects())
             {
                 SkyObject *o = (SkyObject *)dso;
                 if (checkVisibility(o) && o->mag() <= m_Mag)
                 {
                     switch (o->type())
                     {
                         case SkyObject::OPEN_CLUSTER: //fall through
                         case SkyObject::GLOBULAR_CLUSTER:
                             visibleObjects(m_Categories[4]).append(o); //star clusters
                             break;
                         case SkyObject::GASEOUS_NEBULA:   //fall through
                         case SkyObject::PLANETARY_NEBULA: //fall through
                         case SkyObject::SUPERNOVA_REMNANT:
                             visibleObjects(m_Categories[2]).append(o); //nebulae
                             break;
                         case SkyObject::GALAXY:
                             visibleObjects(m_Categories[3]).append(o); //galaxies
                             break;
                     }
                 }
             }
 
             m_CategoryInitialized[m_Categories[2]] = true;
             m_CategoryInitialized[m_Categories[3]] = true;
             m_CategoryInitialized[m_Categories[4]] = true;
         }
     }
 
     //Now the category has been initialized, we can populate the list widget
     foreach (const SkyObject *o, visibleObjects(c))
         WUT->ObjectListWidget->addItem(o->name());
 
     setCursor(QCursor(Qt::ArrowCursor));
 
     // highlight first item
     if (WUT->ObjectListWidget->count())
     {
         WUT->ObjectListWidget->setCurrentRow(0);
         WUT->ObjectListWidget->setFocus();
     }
 }
 
 bool WUTDialog::checkVisibility(const SkyObject *o)
 {
     bool visible(false);
     double minAlt = 6.0; //An object is considered 'visible' if it is above horizon during civil twilight.
 
     // reject objects that never rise
     if (o->checkCircumpolar(geo->lat()) == true && o->alt().Degrees() <= 0)
         return false;
 
     //Initial values for T1, T2 assume all night option of EveningMorningBox
     KStarsDateTime T1 = Evening;
     T1.setTime(sunSetToday);
     KStarsDateTime T2 = Tomorrow;
     T2.setTime(sunRiseTomorrow);
 
     //Check Evening/Morning only state:
     if (EveningFlag == 0) //Evening only
     {
         T2 = T0; //midnight
     }
     else if (EveningFlag == 1) //Morning only
     {
         T1 = T0; //midnight
     }
 
     for (KStarsDateTime test = T1; test < T2; test = test.addSecs(3600))
     {
         //Need LST of the test time, expressed as a dms object.
         KStarsDateTime ut = geo->LTtoUT(test);
         dms LST           = geo->GSTtoLST(ut.gst());
         SkyPoint sp       = o->recomputeCoords(ut, geo);
 
         //check altitude of object at this time.
         sp.EquatorialToHorizontal(&LST, geo->lat());
 
         if (sp.alt().Degrees() > minAlt)
         {
             visible = true;
             break;
         }
     }
 
     return visible;
 }
 
 void WUTDialog::slotDisplayObject(const QString &name)
 {
     QTime tRise, tSet, tTransit;
     QString sRise, sTransit, sSet;
 
     sRise    = "--:--";
     sTransit = "--:--";
     sSet     = "--:--";
     WUT->DetailButton->setEnabled(false);
 
-    SkyObject *o = 0;
+    SkyObject *o = nullptr;
     if (name.isEmpty())
     {
         //no object selected
         WUT->ObjectBox->setTitle(i18n("No Object Selected"));
-        o = 0;
+        o = nullptr;
     }
     else
     {
         o = KStarsData::Instance()->objectNamed(name);
 
         if (!o) //should never get here
         {
             WUT->ObjectBox->setTitle(i18n("Object Not Found"));
         }
     }
     if (o)
     {
         WUT->ObjectBox->setTitle(o->name());
 
         if (o->checkCircumpolar(geo->lat()))
         {
             if (o->alt().Degrees() > 0.0)
             {
                 sRise = i18n("circumpolar");
                 sSet  = i18n("circumpolar");
             }
             else
             {
                 sRise = i18n("does not rise");
                 sSet  = i18n("does not rise");
             }
         }
         else
         {
             tRise = o->riseSetTime(T0, geo, true);
             tSet  = o->riseSetTime(T0, geo, false);
             //          if ( tSet < tRise )
             //              tSet = o->riseSetTime( JDTomorrow, geo, false );
 
             sRise.clear();
             sRise.sprintf("%02d:%02d", tRise.hour(), tRise.minute());
             sSet.clear();
             sSet.sprintf("%02d:%02d", tSet.hour(), tSet.minute());
         }
 
         tTransit = o->transitTime(T0, geo);
         //      if ( tTransit < tRise )
         //          tTransit = o->transitTime( JDTomorrow, geo );
 
         sTransit.clear();
         sTransit.sprintf("%02d:%02d", tTransit.hour(), tTransit.minute());
 
         WUT->DetailButton->setEnabled(true);
     }
 
     WUT->ObjectRiseLabel->setText(i18n("Rises at: %1", sRise));
     WUT->ObjectTransitLabel->setText(i18n("Transits at: %1", sTransit));
     WUT->ObjectSetLabel->setText(i18n("Sets at: %1", sSet));
 }
 
 void WUTDialog::slotCenter()
 {
     KStars *kstars = KStars::Instance();
-    SkyObject *o   = 0;
+    SkyObject *o   = nullptr;
     // get selected item
-    if (WUT->ObjectListWidget->currentItem() != 0)
+    if (WUT->ObjectListWidget->currentItem() != nullptr)
     {
         o = kstars->data()->objectNamed(WUT->ObjectListWidget->currentItem()->text());
     }
-    if (o != 0)
+    if (o != nullptr)
     {
         kstars->map()->setFocusPoint(o);
         kstars->map()->setFocusObject(o);
         kstars->map()->setDestination(*kstars->map()->focusPoint());
     }
 }
 
 void WUTDialog::slotDetails()
 {
     KStars *kstars = KStars::Instance();
-    SkyObject *o   = 0;
+    SkyObject *o   = nullptr;
     // get selected item
-    if (WUT->ObjectListWidget->currentItem() != 0)
+    if (WUT->ObjectListWidget->currentItem() != nullptr)
     {
         o = kstars->data()->objectNamed(WUT->ObjectListWidget->currentItem()->text());
     }
-    if (o != 0)
+    if (o != nullptr)
     {
         QPointer<DetailDialog> detail = new DetailDialog(o, kstars->data()->ut(), geo, kstars);
         detail->exec();
         delete detail;
     }
 }
 void WUTDialog::slotObslist()
 {
-    SkyObject *o = 0;
+    SkyObject *o = nullptr;
     // get selected item
-    if (WUT->ObjectListWidget->currentItem() != 0)
+    if (WUT->ObjectListWidget->currentItem() != nullptr)
     {
         o = KStarsData::Instance()->objectNamed(WUT->ObjectListWidget->currentItem()->text());
     }
-    if (o != 0)
+    if (o != nullptr)
     {
         KStarsData::Instance()->observingList()->slotAddObject(o, session);
     }
 }
 
 void WUTDialog::slotChangeDate()
 {
     // Set the time T0 to the evening of today. This will make life easier for the user, who most probably
     // wants to see what's up on the night of some date, rather than the night of the previous day
     T0.setTime(QTime(18, 0, 0)); // 6 PM
 
     QPointer<TimeDialog> td = new TimeDialog(T0, KStarsData::Instance()->geo(), this);
     if (td->exec() == QDialog::Accepted)
     {
         T0 = td->selectedDateTime();
 
         // If the time is set to 12 midnight, set it to 00:00:01, so that we don't have date interpretation problems
         if (T0.time() == QTime(0, 0, 0))
             T0.setTime(QTime(0, 0, 1));
 
         //If the Time is earlier than 6:00 am, assume the user wants the night of the previous date
         if (T0.time().hour() < 6)
             T0 = T0.addDays(-1);
 
         //Now, set time T0 to midnight (of the following day)
         T0.setTime(QTime(0, 0, 0));
         T0  = T0.addDays(1);
         UT0 = geo->LTtoUT(T0);
 
         //Set the Tomorrow date/time to Noon the following day
         Tomorrow   = T0.addSecs(12 * 3600);
         TomorrowUT = geo->LTtoUT(Tomorrow);
 
         //Set the Evening date/time to 6:00 pm
         Evening   = T0.addSecs(-6 * 3600);
         EveningUT = geo->LTtoUT(Evening);
 
         WUT->DateLabel->setText(i18n("The night of %1", QLocale().toString(Evening.date(), QLocale::LongFormat)));
 
         init();
         slotLoadList(WUT->CategoryListWidget->currentItem()->text());
     }
     delete td;
 }
 
 void WUTDialog::slotChangeLocation()
 {
     QPointer<LocationDialog> ld = new LocationDialog(this);
     if (ld->exec() == QDialog::Accepted)
     {
         GeoLocation *newGeo = ld->selectedCity();
         if (newGeo)
         {
             geo        = newGeo;
             UT0        = geo->LTtoUT(T0);
             TomorrowUT = geo->LTtoUT(Tomorrow);
             EveningUT  = geo->LTtoUT(Evening);
 
             WUT->LocationLabel->setText(i18n("at %1", geo->fullName()));
 
             init();
             slotLoadList(WUT->CategoryListWidget->currentItem()->text());
         }
     }
     delete ld;
 }
 
 void WUTDialog::slotEveningMorning(int index)
 {
     if (EveningFlag != index)
     {
         EveningFlag = index;
         init();
         slotLoadList(WUT->CategoryListWidget->currentItem()->text());
     }
 }
 
 void WUTDialog::updateMag()
 {
     m_Mag = WUT->MagnitudeEdit->value();
     init();
     slotLoadList(WUT->CategoryListWidget->currentItem()->text());
 }
 
 void WUTDialog::slotChangeMagnitude()
 {
     if (timer)
     {
         timer->stop();
     }
     else
     {
         timer = new QTimer(this);
         timer->setSingleShot(true);
         connect(timer, SIGNAL(timeout()), this, SLOT(updateMag()));
     }
     timer->start(500);
 }
diff --git a/kstars/widgets/clicklabel.h b/kstars/widgets/clicklabel.h
index b7a4b93e2..5ebf4a2d4 100644
--- a/kstars/widgets/clicklabel.h
+++ b/kstars/widgets/clicklabel.h
@@ -1,46 +1,46 @@
 /***************************************************************************
                           clicklabel.h  -  description
                              -------------------
     begin                : Sat 03 Dec 2005
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef CLICKLABEL_H
 #define CLICKLABEL_H
 
 #include <QLabel>
 #include <QMouseEvent>
 
 /** @class ClickLabel is a QLabel with a clicked() signal.
 	*@author Jason Harris
 	*@version 1.0
 	*/
 class ClickLabel : public QLabel
 {
     Q_OBJECT
   public:
-    explicit ClickLabel(QWidget *parent = 0, const char *name = 0);
+    explicit ClickLabel(QWidget *parent = nullptr, const char *name = nullptr);
     ~ClickLabel() override {}
 
   signals:
     void clicked();
 
   protected:
     void mousePressEvent(QMouseEvent *e) override
     {
         if (e->button() == Qt::LeftButton)
             emit clicked();
     }
 };
 
 #endif
diff --git a/kstars/widgets/dmsbox.h b/kstars/widgets/dmsbox.h
index e724b1dcc..2bb8ef6e9 100644
--- a/kstars/widgets/dmsbox.h
+++ b/kstars/widgets/dmsbox.h
@@ -1,148 +1,148 @@
 /***************************************************************************
                           dmsbox.h  -  description
                              -------------------
     begin                : Wed Dec 19 2002
     copyright            : (C) 2001-2002 by Pablo de Vicente
     email                : vicente@oan.es
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef DMSBOX_H
 #define DMSBOX_H
 
 #include <QFocusEvent>
 #include <QLineEdit>
 //#include <klineedit.h>
 
 #include "dms.h"
 
 /** @class dmsBox
 	*A QLineEdit which is capable of displaying and parsing angle values
 	*flexibly and robustly.  Angle values can be displayed and parsed as
 	*Degrees or Hours.  When displaying a value, it uses a space-delimited
 	*triplet of integers representing the degrees, arcminutes, and arcseconds
 	*of the angle (or hours, minutes, seconds).  For example, "-34 45 57".
 	*When parsing a value input by the user, it can also understand
 	*a number of other formats:
 	*@li colon-delimited fields ("-34:45:57")
 	*@li one or two fields ("-35"; "-34 46")
 	*@li fields with unit-labels ("-34d 45m 57s")
 	*@li floating-point numbers ("-34.76583")
 	*
 	*@note Inherits QLineEdit.
 	*@author Pablo de Vicente
 	*@version 1.0
 	*/
 
 class dmsBox : public QLineEdit
 {
     Q_OBJECT
     Q_PROPERTY(bool degType READ degType WRITE setDegType)
 
   public:
     /**Constructor for the dmsBox object.
         	*@param parent pointer to the parent QWidget
         	*@param deg if true use deg/arcmin/arcsec; otherwise
         	*           use hours/min/sec.
         	*/
     explicit dmsBox(QWidget *parent, bool deg = true);
 
     /**Destructor (empty)*/
     ~dmsBox() override;
 
     /**Display an angle using Hours/Min/Sec.
         	*@p t the dms object which is to be displayed
         	*/
     void showInHours(dms t);
     /**Display an angle using Hours/Min/Sec.  This behaves just
         	*like the above function.  It differs only in the data type of
         	*the argument.
         	*@p t pointer to the dms object which is to be displayed
         	*/
     void showInHours(const dms *t);
 
     /**Display an angle using Deg/Arcmin/Arcsec.
         	*@p t the dms object which is to be displayed
         	*/
     void showInDegrees(dms t);
     /**Display an angle using Deg/Arcmin/Arcsec.  This behaves just
         	*like the above function.  It differs only in the data type of
         	*the argument.
         	*@p t pointer to the dms object which is to be displayed
         	*/
     void showInDegrees(const dms *t);
 
     /**Display an angle.  Simply calls showInDegrees(t) or
         	*showInHours(t) depending on the value of deg.
         	*@param t the dms object which is to be displayed.
         	*@param deg if true, display Deg/Arcmin/Arcsec; otherwise
         	*display Hours/Min/Sec.
         	*/
     void show(dms t, bool deg = true);
     /**Display an angle.  Simply calls showInDegrees(t) or
         	*showInHours(t) depending on the value of deg.
         	*This behaves essentially like the above function.  It
         	*differs only in the data type of its argument.
         	*@param t the dms object which is to be displayed.
         	*@param deg if true, display Deg/Arcmin/Arcsec; otherwise
         	*display Hours/Min/Sec.
         	*/
     void show(const dms *t, bool deg = true);
 
     /**Simply display a string.
         	*@note JH: Why don't we just use QLineEdit::setText() instead?
         	*@param s the string to display (it need not be a valid angle value).
         	*/
     void setDMS(const QString &s) { setText(s); }
 
     /**Parse the text in the dmsBox as an angle.  The text may be an integer
         	*or double value, or it may be a triplet of integer values (separated by spaces
         	*or colons) representing deg/hrs, min, sec.  It is also possible to have two
         	*fields.  In this case, if the second field is a double, it is converted
         	*to decimal min and double sec.
         	*@param deg if true use deg/arcmin/arcsec; otherwise
         	*           use hours/min/sec.
         	*@param ok set to true if a dms object was succedssfully created.
         	*@return a dms object constructed from the fields of the dmsbox
         	*/
-    dms createDms(bool deg = true, bool *ok = 0);
+    dms createDms(bool deg = true, bool *ok = nullptr);
 
     /** @return a boolean indicating if object contains degrees or hours
         	*/
     bool degType(void) const { return deg; }
 
     /** @short set the dmsBox to Degrees or Hours
         	*@param t if true, the box expects angle values in degrees; otherwise
         	*it expects values in hours
         	*/
     void setDegType(bool t);
 
     /**Clears the QLineEdit
         	*/
     void clearFields(void) { setDMS(QString()); }
 
     inline bool isEmpty() { return EmptyFlag; }
 
   protected:
     void focusInEvent(QFocusEvent *e) override;
     void focusOutEvent(QFocusEvent *e) override;
 
   private slots:
     void slotTextChanged(const QString &t);
 
   private:
     void setEmptyText();
 
     bool deg, EmptyFlag;
     dms degValue;
 };
 
 #endif
diff --git a/kstars/widgets/draglistbox.cpp b/kstars/widgets/draglistbox.cpp
index 594b9b462..7d8a62aa9 100644
--- a/kstars/widgets/draglistbox.cpp
+++ b/kstars/widgets/draglistbox.cpp
@@ -1,141 +1,141 @@
 /***************************************************************************
                           draglistbox.cpp  -  description
                              -------------------
     begin                : Sun May 29 2005
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "draglistbox.h"
 
 #include <QDrag>
 #include <QDragEnterEvent>
 #include <QDropEvent>
 #include <QMimeData>
 #include <QMouseEvent>
 
 #include <KLocalizedString>
 
 DragListBox::DragListBox(QWidget *parent, const char *name) : QListWidget(parent)
 {
     if (name)
     {
         setObjectName(name);
     }
     setAcceptDrops(true);
 }
 
 bool DragListBox::contains(const QString &s) const
 {
     QList<QListWidgetItem *> foundList = findItems(s, Qt::MatchExactly);
     if (foundList.isEmpty())
         return false;
     else
         return true;
 }
 
 void DragListBox::dragEnterEvent(QDragEnterEvent *evt)
 {
     if (evt->mimeData()->hasText())
     {
         evt->acceptProposedAction();
     }
     else
     {
         evt->ignore();
     }
 }
 
 void DragListBox::dragMoveEvent(QDragMoveEvent *evt)
 {
     if (evt->mimeData()->hasText())
     {
         evt->acceptProposedAction();
     }
     else
     {
         evt->ignore();
     }
 }
 
 void DragListBox::dropEvent(QDropEvent *evt)
 {
     QString text;
 
     if (evt->mimeData()->hasText())
     {
         text = evt->mimeData()->text();
 
         //Copy an item dragged from FieldPool to FieldList
         //If we dragged an "Ignore" item from the FieldPool to the FieldList, then we don't
         //need to insert the item, because FieldPool already has a persistent Ignore item.
         if (!(text == i18n("Ignore") && QString(evt->source()->objectName()) == "FieldList" && evt->source() != this))
         {
             QListWidgetItem *lwi = itemAt(evt->pos());
-            if (lwi == 0 && evt->pos().y() > visualItemRect(item(count() - 1)).bottom())
+            if (lwi == nullptr && evt->pos().y() > visualItemRect(item(count() - 1)).bottom())
             {
                 addItem(text);
             }
             else
             {
                 int i = row(itemAt(evt->pos()));
                 insertItem(i, text);
             }
         }
 
         //Remove an item dragged from FieldList to FieldPool.
         //If we dragged the "Ignore" item from FieldList to FieldPool, then we don't
         //want to remove the item from the FieldPool
         if (!(text == i18n("Ignore") && QString(evt->source()->objectName()) == "FieldPool" && evt->source() != this))
         {
             DragListBox *fp = (DragListBox *)evt->source();
             delete fp->takeItem(fp->currentRow());
         }
     }
     evt->acceptProposedAction();
 }
 
 void DragListBox::mousePressEvent(QMouseEvent *evt)
 {
     QListWidget::mousePressEvent(evt);
 
     if (evt->button() == Qt::LeftButton)
     {
         leftButtonDown = true;
     }
 }
 
 void DragListBox::mouseReleaseEvent(QMouseEvent *evt)
 {
     QListWidget::mouseReleaseEvent(evt);
 
     if (evt->button() == Qt::LeftButton)
     {
         leftButtonDown = false;
     }
 }
 
 void DragListBox::mouseMoveEvent(QMouseEvent *evt)
 {
     if (leftButtonDown)
     {
         leftButtonDown = false; //Don't create multiple QDrag objects!
 
         QDrag *drag         = new QDrag(this);
         QMimeData *mimeData = new QMimeData;
         mimeData->setText(currentItem()->text());
         drag->setMimeData(mimeData);
 
         drag->exec();
         evt->accept();
     }
 }
diff --git a/kstars/widgets/fovwidget.cpp b/kstars/widgets/fovwidget.cpp
index 02e1b23c2..9bbce407c 100644
--- a/kstars/widgets/fovwidget.cpp
+++ b/kstars/widgets/fovwidget.cpp
@@ -1,58 +1,58 @@
 /***************************************************************************
                           fovwidget.cpp  -  description
                              -------------------
     begin                : Sat 22 Sept 2007
     copyright            : (C) 2007 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "fovwidget.h"
 #include "dialogs/fovdialog.h"
 #include "fov.h"
 
 #include <QPaintEvent>
 #include <QPainter>
 
-FOVWidget::FOVWidget(QWidget *parent) : QFrame(parent), m_FOV(0)
+FOVWidget::FOVWidget(QWidget *parent) : QFrame(parent), m_FOV(nullptr)
 {
 }
 
 FOVWidget::~FOVWidget()
 {
 }
 
 void FOVWidget::setFOV(FOV *f)
 {
     m_FOV = f;
 }
 
 void FOVWidget::paintEvent(QPaintEvent *)
 {
     QPainter p;
     p.begin(this);
     p.setRenderHint(QPainter::Antialiasing, true);
     p.fillRect(contentsRect(), QColor("black"));
 
     if (m_FOV && m_FOV->sizeX() > 0 && m_FOV->sizeY() > 0)
     {
         m_FOV->draw(p, 0.6 * contentsRect().width(), 0.6 * contentsRect().height());
         QFont smallFont = p.font();
         smallFont.setPointSize(p.font().pointSize() - 2);
         p.setFont(smallFont);
         // TODO: Check if decimal points in this are localized (eg: It should read 1,5 x 1,5 in German rather than 1.5 x 1.5)
         p.drawText(rect(), Qt::AlignHCenter | Qt::AlignBottom,
                    i18nc("angular size in arcminutes", "%1 x %2 arcmin", QString::number(m_FOV->sizeX(), 'f', 1),
                          QString::number(m_FOV->sizeY(), 'f', 1)));
     }
 
     p.end();
 }
diff --git a/kstars/widgets/fovwidget.h b/kstars/widgets/fovwidget.h
index 8ac65550e..d895e794d 100644
--- a/kstars/widgets/fovwidget.h
+++ b/kstars/widgets/fovwidget.h
@@ -1,41 +1,41 @@
 /***************************************************************************
                           fovwidget.h  -  description
                              -------------------
     begin                : Sat 22 Sept 2007
     copyright            : (C) 2007 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef FOVWIDGET_H_
 #define FOVWIDGET_H_
 
 #include <QFrame>
 
 class FOV;
 
 class FOVWidget : public QFrame
 {
     Q_OBJECT
   public:
-    explicit FOVWidget(QWidget *parent = 0);
+    explicit FOVWidget(QWidget *parent = nullptr);
     ~FOVWidget() override;
 
     void setFOV(FOV *f);
 
   protected:
     void paintEvent(QPaintEvent *e) override;
 
   private:
     FOV *m_FOV;
 };
 
 #endif
diff --git a/kstars/widgets/infoboxwidget.h b/kstars/widgets/infoboxwidget.h
index e8efc09ba..3ad8c420c 100644
--- a/kstars/widgets/infoboxwidget.h
+++ b/kstars/widgets/infoboxwidget.h
@@ -1,118 +1,118 @@
 /***************************************************************************
                           infoboxwidet.h  -  description
                              -------------------
     begin                : 20 Aug 2009
     copyright            : (C) 2009 by Khudyakov Alexey
     email                : alexey.skladnoy@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef INFOBOXWIDGET_H_
 #define INFOBOXWIDGET_H_
 
 #include <QWidget>
 #include <QPoint>
 #include <QList>
 #include <QString>
 #include <QStringList>
 
 class SkyPoint;
 class SkyObject;
 class InfoBoxWidget;
 
 /**
  * @brief The InfoBoxes class is a collection of InfoBoxWidget objects that display a transparent box for display of text messages
  */
 class InfoBoxes : public QWidget
 {
     Q_OBJECT
   public:
-    explicit InfoBoxes(QWidget *parent = 0);
+    explicit InfoBoxes(QWidget *parent = nullptr);
     ~InfoBoxes() override;
 
     void addInfoBox(InfoBoxWidget *ibox);
     QList<InfoBoxWidget *> getInfoBoxes() const { return m_boxes; }
 
   protected:
     void resizeEvent(QResizeEvent *event) override;
 
   private:
     QList<InfoBoxWidget *> m_boxes;
 };
 
 /**
 * @brief The InfoBoxWidget class is a widget that displays a transparent box for display of text messages.
 */
 class InfoBoxWidget : public QWidget
 {
     Q_OBJECT
   public:
     /** Alignment of widget. */
     enum
     {
         NoAnchor     = 0,
         AnchorRight  = 1,
         AnchorBottom = 2,
         AnchorBoth   = 3
     };
 
     /** Create one infobox. */
     InfoBoxWidget(bool shade, const QPoint &pos, int anchor = 0, const QStringList &str = QStringList(),
-                  QWidget *parent = 0);
+                  QWidget *parent = nullptr);
     /** Destructor */
     ~InfoBoxWidget() override;
 
     /** Check whether box is shaded. In this case only one line is shown. */
     bool shaded() const { return m_shaded; }
     /** Get stickyness status of */
     int sticky() const { return m_anchor; }
 
     /** Adjust widget's postion */
     void adjust();
 
   public slots:
     /** Set information about time. Data is taken from KStarsData. */
     void slotTimeChanged();
     /** Set information about location. Data is taken from KStarsData. */
     void slotGeoChanged();
     /** Set information about object. */
     void slotObjectChanged(SkyObject *obj);
     /** Set information about pointing. */
     void slotPointChanged(SkyPoint *p);
   signals:
     /** Emitted when widget is clicked */
     void clicked();
 
   protected:
     void paintEvent(QPaintEvent *event) override;
     void mouseDoubleClickEvent(QMouseEvent *event) override;
     void mousePressEvent(QMouseEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;
     void showEvent(QShowEvent *event) override;
 
   private:
     /** Uset to set information about object. */
     void setPoint(QString name, SkyPoint *p);
     /** Recalculate size of widet */
     void updateSize();
 
     QStringList m_strings; // list of string to show
     bool m_adjusted;       // True if widget coordinates were adjusted
     bool m_grabbed;        // True if widget is dragged around
     bool m_shaded;         // True if widget if shaded
     int m_anchor;          // Vertical alignment of widget
 
     static const int padX;
     static const int padY;
 };
 
 #endif /* INFOBOXWIDGET_H_ */
diff --git a/kstars/widgets/kshelplabel.h b/kstars/widgets/kshelplabel.h
index 43e947df1..94cf3e59a 100644
--- a/kstars/widgets/kshelplabel.h
+++ b/kstars/widgets/kshelplabel.h
@@ -1,73 +1,73 @@
 /***************************************************************************
             kshelplabel.h - Help label used to document astronomical terms
                              -------------------
     begin                : Wed 1 Dec 2010
     copyright            : (C) 2010 by Valery Kharitonov
     email                : kharvd@gmail.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef KSHELPLABEL_H
 #define KSHELPLABEL_H
 
 #include <QLabel>
 
 /** Label for displaying links to AstroInfo project
  * @author Valery Kharitonov
  */
 class KSHelpLabel : public QLabel
 {
     Q_OBJECT
     Q_PROPERTY(QString anchor READ anchor WRITE setAnchor)
     Q_PROPERTY(QString text READ text WRITE setText)
 
   public:
     /**
          * Constructor. Creates clear label
          */
-    explicit KSHelpLabel(QWidget *parent = 0);
+    explicit KSHelpLabel(QWidget *parent = nullptr);
 
     /**
          * Constructor. Creates label with a text and help anchor.
          * @param text Text of the label
          * @param anchor Name of the section in the AstroInfo project (without 'ai-')
          */
-    KSHelpLabel(const QString &text, const QString &anchor, QWidget *parent = 0);
+    KSHelpLabel(const QString &text, const QString &anchor, QWidget *parent = nullptr);
 
     QString text() const { return m_cleanText; }
     void setText(const QString &text);
 
     void setAnchor(const QString &anchor);
     QString anchor() const { return m_anchor; }
 
   private slots:
     /** Open AstroInfo definition of the terms
          * @param term jargon term */
     void slotShowDefinition(const QString &term);
 
   private:
     /**
          * Updates text with the new anchor
          */
     void updateText();
 
     /**
          * Anchor in AstroInfo project
          */
     QString m_anchor;
 
     /**
          * String without markup
          */
     QString m_cleanText;
 };
 
 #endif // KSHELPLABEL_H
diff --git a/kstars/widgets/logedit.h b/kstars/widgets/logedit.h
index aab73f818..972c610bd 100644
--- a/kstars/widgets/logedit.h
+++ b/kstars/widgets/logedit.h
@@ -1,43 +1,43 @@
 /***************************************************************************
                           logedit.h  -  description
                              -------------------
     begin                : Sat 03 Dec 2005
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef LOGEDIT_H
 #define LOGEDIT_H
 
 #include <QTextEdit>
 #include <QFocusEvent>
 
 /** @class LogEdit is a simple derivative of QTextEdit, that just adds a
 	*focusOut() signal, emitted when the edit loses focus.
 	*@author Jason Harris
 	*@version 1.0
 	*/
 class LogEdit : public QTextEdit
 {
     Q_OBJECT
   public:
-    explicit LogEdit(QWidget *parent = 0);
+    explicit LogEdit(QWidget *parent = nullptr);
     ~LogEdit() override {}
 
   signals:
     void focusOut();
 
   protected:
     void focusOutEvent(QFocusEvent *e) override;
 };
 
 #endif
diff --git a/kstars/widgets/magnitudespinbox.h b/kstars/widgets/magnitudespinbox.h
index 469db1323..c7ba6c281 100644
--- a/kstars/widgets/magnitudespinbox.h
+++ b/kstars/widgets/magnitudespinbox.h
@@ -1,40 +1,40 @@
 /***************************************************************************
                           magnitudespinbox.h  -  description
                              -------------------
     begin                : Thu Jul 26 2001
     copyright            : (C) 2001 by Heiko Evermann
     email                : heiko@evermann.de
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 /** @class MagnitudeSpinBox
 	*A special spinbox for entering magnitude values.
 	*This class now inherits QDoubleSpinBox instead of QSpinBox
 	*@short a custom spinbox for magnitude (float) values.
 	*@author Heiko Evermann
 	*@version 1.0
 	*/
 #pragma once
 
 #include <QDoubleSpinBox>
 
 class QWidget;
 
 class MagnitudeSpinBox : public QDoubleSpinBox
 {
   Q_OBJECT
   public:
     /** Default Constructor */
-    explicit MagnitudeSpinBox(QWidget *parent = 0);
+    explicit MagnitudeSpinBox(QWidget *parent = nullptr);
 
     /** Constructor.  Set minimum and maximum values for the spinbox. */
     MagnitudeSpinBox(double minValue, double maxValue, QWidget *parent = nullptr);
 };
diff --git a/kstars/widgets/mapcanvas.cpp b/kstars/widgets/mapcanvas.cpp
index 15759fb5b..8b699b5bd 100644
--- a/kstars/widgets/mapcanvas.cpp
+++ b/kstars/widgets/mapcanvas.cpp
@@ -1,132 +1,132 @@
 /***************************************************************************
                           mapcanvas.cpp  -  K Desktop Planetarium
                              -------------------
     begin                : Tue Apr 10 2001
     copyright            : (C) 2001 by Jason Harris
     email                : jharris@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #include "mapcanvas.h"
 #include <cstdlib>
 
 #include <QPainter>
 #include <QPixmap>
 #include <QMouseEvent>
 #include <QPaintEvent>
 #include <QStandardPaths>
 #include "kspaths.h"
 
 #include "dialogs/locationdialog.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 
-MapCanvas::MapCanvas(QWidget *parent) : QFrame(parent), ld(0)
+MapCanvas::MapCanvas(QWidget *parent) : QFrame(parent), ld(nullptr)
 {
     setAutoFillBackground(false);
 
     QString bgFile = KSPaths::locate(QStandardPaths::GenericDataLocation, "geomap.png");
     bgImage        = new QPixmap(bgFile);
 
     origin.setX(bgImage->width() / 2);
     origin.setY(bgImage->height() / 2);
 }
 
 MapCanvas::~MapCanvas()
 {
     delete bgImage;
 }
 
 void MapCanvas::setGeometry(int x, int y, int w, int h)
 {
     QWidget::setGeometry(x, y, w, h);
     origin.setX(w / 2);
     origin.setY(h / 2);
 }
 
 void MapCanvas::setGeometry(const QRect &r)
 {
     QWidget::setGeometry(r);
     origin.setX(r.width() / 2);
     origin.setY(r.height() / 2);
 }
 
 void MapCanvas::mousePressEvent(QMouseEvent *e)
 {
     //Determine Lat/Long corresponding to event press
     int lng = (e->x() - origin.x());
     int lat = (origin.y() - e->y());
 
     if (ld)
         ld->findCitiesNear(lng, lat);
 }
 
 void MapCanvas::paintEvent(QPaintEvent *)
 {
     QPainter p;
 
     //prepare the canvas
     p.begin(this);
     p.drawPixmap(0, 0, bgImage->scaled(size()));
     p.setPen(QPen(QColor("SlateGrey")));
 
     //Draw cities
     QPoint o;
     foreach (GeoLocation *g, KStarsData::Instance()->getGeoList())
     {
         o.setX(int(g->lng()->Degrees() + origin.x()));
         o.setY(height() - int(g->lat()->Degrees() + origin.y()));
 
         if (o.x() >= 0 && o.x() <= width() && o.y() >= 0 && o.y() <= height())
         {
             p.drawPoint(o.x(), o.y());
         }
     }
 
     // FIXME: there must be better way to this. Without bothering LocationDialog
     if (ld)
     {
         //redraw the cities that appear in the filtered list, with a white pen
         //If the list has not been filtered, skip the redraw.
         if (ld->filteredList().size())
         {
             p.setPen(Qt::white);
             foreach (GeoLocation *g, ld->filteredList())
             {
                 o.setX(int(g->lng()->Degrees() + origin.x()));
                 o.setY(height() - int(g->lat()->Degrees() + origin.y()));
 
                 if (o.x() >= 0 && o.x() <= width() && o.y() >= 0 && o.y() <= height())
                 {
                     p.drawPoint(o.x(), o.y());
                 }
             }
         }
 
         GeoLocation *g = ld->selectedCity();
         if (g)
         {
             o.setX(int(g->lng()->Degrees() + origin.x()));
             o.setY(height() - int(g->lat()->Degrees() + origin.y()));
 
             p.setPen(Qt::red);
             p.setBrush(Qt::red);
             p.drawEllipse(o.x() - 3, o.y() - 3, 6, 6);
             p.drawLine(o.x() - 16, o.y(), o.x() - 8, o.y());
             p.drawLine(o.x() + 8, o.y(), o.x() + 16, o.y());
             p.drawLine(o.x(), o.y() - 16, o.x(), o.y() - 8);
             p.drawLine(o.x(), o.y() + 8, o.x(), o.y() + 16);
             p.setPen(Qt::white);
             p.setBrush(Qt::white);
         }
     }
     p.end();
 }
diff --git a/kstars/widgets/thumbimage.h b/kstars/widgets/thumbimage.h
index 6982c9513..70c4698c7 100644
--- a/kstars/widgets/thumbimage.h
+++ b/kstars/widgets/thumbimage.h
@@ -1,62 +1,62 @@
 /***************************************************************************
                           thumbimage.h  -  description
                              -------------------
     begin                : Fri 09 Dec 2005
     copyright            : (C) 2005 by Jason Harris
     email                : kstars@30doradus.org
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef THUMBIMAGE_H
 #define THUMBIMAGE_H
 
 #include <QLabel>
 #include <QPixmap>
 
 class ThumbImage : public QLabel
 {
     Q_OBJECT
   public:
-    explicit ThumbImage(QWidget *parent, const char *name = 0);
+    explicit ThumbImage(QWidget *parent, const char *name = nullptr);
     ~ThumbImage() override;
 
     void setImage(QPixmap *pm)
     {
         Image = pm;
         setFixedSize(Image->width(), Image->height());
     }
     QPixmap *image() { return Image; }
     QPixmap croppedImage();
 
     void setCropRect(int x, int y, int w, int h) { CropRect->setRect(x, y, w, h); }
     QRect *cropRect() const { return CropRect; }
 
   signals:
     void cropRegionModified();
 
   protected:
     //	void resizeEvent( QResizeEvent *e);
     void paintEvent(QPaintEvent *) override;
     void mousePressEvent(QMouseEvent *e) override;
     void mouseReleaseEvent(QMouseEvent *e) override;
     void mouseMoveEvent(QMouseEvent *e) override;
 
   private:
     QRect *CropRect;
     QPoint *Anchor;
     QPixmap *Image;
 
     bool bMouseButtonDown;
     bool bTopLeftGrab, bBottomLeftGrab, bTopRightGrab, bBottomRightGrab;
     int HandleSize;
 };
 
 #endif
diff --git a/kstars/widgets/unitspinboxwidget.h b/kstars/widgets/unitspinboxwidget.h
index 956c0db5a..df23137d6 100644
--- a/kstars/widgets/unitspinboxwidget.h
+++ b/kstars/widgets/unitspinboxwidget.h
@@ -1,56 +1,56 @@
 /***************************************************************************
                unitspinboxwidget.h - A widget for providing multiple units
                              -------------------
     begin                : Sun 18th Jan 2015
     copyright            : (C) 2015 Utkarsh Simha
     email                : utkarshsimha@gmail.com
 ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef UNITSPINBOXWIDGET_H
 #define UNITSPINBOXWIDGET_H
 
 #include "ui_unitspinboxwidget.h"
 
 /**
  * @brief The UnitSpinBoxWidget class
     * It is a widget that provides a DoubleSpinBox
     * and a ComboBox for conversions from different
     * units.
  * @author Utkarsh Simha
  */
 class UnitSpinBoxWidget : public QWidget
 {
     Q_OBJECT
 
   public:
-    explicit UnitSpinBoxWidget(QWidget *parent = 0);
+    explicit UnitSpinBoxWidget(QWidget *parent = nullptr);
     ~UnitSpinBoxWidget() override;
 
     /**
          * @brief addUnit Adds a item to the combo box
          * @param unitName The name of the unit to be displayed
          * @param conversionFactor The factor the value of a unit must be multiplied by
          */
     void addUnit(const QString &unitName, double conversionFactor);
 
     /**
          * @brief value Returns value upon conversion
          */
     double value() const;
 
   private:
     Ui::UnitSpinBoxWidget *ui;
     QComboBox *comboBox;
     QDoubleSpinBox *doubleSpinBox;
 };
 
 #endif // UNITSPINBOXWIDGET_H