diff --git a/src/dolphincontextmenu.cpp b/src/dolphincontextmenu.cpp
--- a/src/dolphincontextmenu.cpp
+++ b/src/dolphincontextmenu.cpp
@@ -68,7 +68,7 @@
     m_baseUrl(baseUrl),
     m_baseFileItem(0),
     m_selectedItems(),
-    m_selectedItemsProperties(0),
+    m_selectedItemsProperties(nullptr),
     m_context(NoContext),
     m_copyToMenu(parent),
     m_customActions(),
@@ -84,7 +84,7 @@
 DolphinContextMenu::~DolphinContextMenu()
 {
     delete m_selectedItemsProperties;
-    m_selectedItemsProperties = 0;
+    m_selectedItemsProperties = nullptr;
 }
 
 void DolphinContextMenu::setCustomActions(const QList<QAction*>& actions)
@@ -195,10 +195,10 @@
 {
     Q_ASSERT(!m_fileInfo.isNull());
 
-    QAction* openParentAction = 0;
-    QAction* openParentInNewWindowAction = 0;
-    QAction* openParentInNewTabAction = 0;
-    QAction* addToPlacesAction = 0;
+    QAction* openParentAction = nullptr;
+    QAction* openParentInNewWindowAction = nullptr;
+    QAction* openParentInNewTabAction = nullptr;
+    QAction* addToPlacesAction = nullptr;
     const KFileItemListProperties& selectedItemsProps = selectedItemsProperties();
 
     if (m_selectedItems.count() == 1) {
diff --git a/src/dolphindockwidget.cpp b/src/dolphindockwidget.cpp
--- a/src/dolphindockwidget.cpp
+++ b/src/dolphindockwidget.cpp
@@ -35,7 +35,7 @@
     Q_OBJECT
 
 public:
-    DolphinDockTitleBar(QWidget* parent = 0) : QWidget(parent) {}
+    explicit DolphinDockTitleBar(QWidget* parent = nullptr) : QWidget(parent) {}
     virtual ~DolphinDockTitleBar() {}
 
     QSize minimumSizeHint() const Q_DECL_OVERRIDE
@@ -53,15 +53,15 @@
 DolphinDockWidget::DolphinDockWidget(const QString& title, QWidget* parent, Qt::WindowFlags flags) :
     QDockWidget(title, parent, flags),
     m_locked(false),
-    m_dockTitleBar(0)
+    m_dockTitleBar(nullptr)
 {
     setFeatures(DefaultDockWidgetFeatures);
 }
 
 DolphinDockWidget::DolphinDockWidget(QWidget* parent, Qt::WindowFlags flags) :
     QDockWidget(parent, flags),
     m_locked(false),
-    m_dockTitleBar(0)
+    m_dockTitleBar(nullptr)
 {
     setFeatures(DefaultDockWidgetFeatures);
 }
@@ -82,7 +82,7 @@
             setTitleBarWidget(m_dockTitleBar);
             setFeatures(QDockWidget::NoDockWidgetFeatures);
         } else {
-            setTitleBarWidget(0);
+            setTitleBarWidget(nullptr);
             setFeatures(DefaultDockWidgetFeatures);
         }
     }
diff --git a/src/panels/folders/folderspanel.h b/src/panels/folders/folderspanel.h
--- a/src/panels/folders/folderspanel.h
+++ b/src/panels/folders/folderspanel.h
@@ -39,7 +39,7 @@
     Q_OBJECT
 
 public:
-    FoldersPanel(QWidget* parent = 0);
+    explicit FoldersPanel(QWidget* parent = nullptr);
     virtual ~FoldersPanel();
 
     void setShowHiddenFiles(bool show);
diff --git a/src/panels/folders/folderspanel.cpp b/src/panels/folders/folderspanel.cpp
--- a/src/panels/folders/folderspanel.cpp
+++ b/src/panels/folders/folderspanel.cpp
@@ -55,8 +55,8 @@
 FoldersPanel::FoldersPanel(QWidget* parent) :
     Panel(parent),
     m_updateCurrentItem(false),
-    m_controller(0),
-    m_model(0)
+    m_controller(nullptr),
+    m_model(nullptr)
 {
     setLayoutDirection(Qt::LeftToRight);
 }
@@ -67,7 +67,7 @@
 
     if (m_controller) {
         KItemListView* view = m_controller->view();
-        m_controller->setView(0);
+        m_controller->setView(nullptr);
         delete view;
     }
 }
diff --git a/src/panels/information/filemetadataconfigurationdialog.cpp b/src/panels/information/filemetadataconfigurationdialog.cpp
--- a/src/panels/information/filemetadataconfigurationdialog.cpp
+++ b/src/panels/information/filemetadataconfigurationdialog.cpp
@@ -35,8 +35,8 @@
 
 FileMetaDataConfigurationDialog::FileMetaDataConfigurationDialog(QWidget* parent) :
     QDialog(parent),
-    m_descriptionLabel(0),
-    m_configWidget(0)
+    m_descriptionLabel(nullptr),
+    m_configWidget(nullptr)
 
 {
     setWindowTitle(i18nc("@title:window", "Configure Shown Data"));
diff --git a/src/panels/information/informationpanel.h b/src/panels/information/informationpanel.h
--- a/src/panels/information/informationpanel.h
+++ b/src/panels/information/informationpanel.h
@@ -36,7 +36,7 @@
     Q_OBJECT
 
 public:
-    explicit InformationPanel(QWidget* parent = 0);
+    explicit InformationPanel(QWidget* parent = nullptr);
     virtual ~InformationPanel();
 
 signals:
diff --git a/src/panels/information/informationpanel.cpp b/src/panels/information/informationpanel.cpp
--- a/src/panels/information/informationpanel.cpp
+++ b/src/panels/information/informationpanel.cpp
@@ -32,16 +32,16 @@
 InformationPanel::InformationPanel(QWidget* parent) :
     Panel(parent),
     m_initialized(false),
-    m_infoTimer(0),
-    m_urlChangedTimer(0),
-    m_resetUrlTimer(0),
+    m_infoTimer(nullptr),
+    m_urlChangedTimer(nullptr),
+    m_resetUrlTimer(nullptr),
     m_shownUrl(),
     m_urlCandidate(),
     m_invalidUrlCandidate(),
     m_fileItem(),
     m_selection(),
-    m_folderStatJob(0),
-    m_content(0)
+    m_folderStatJob(nullptr),
+    m_content(nullptr)
 {
 }
 
diff --git a/src/panels/information/phononwidget.cpp b/src/panels/information/phononwidget.cpp
--- a/src/panels/information/phononwidget.cpp
+++ b/src/panels/information/phononwidget.cpp
@@ -41,7 +41,7 @@
     Q_OBJECT
 
     public:
-        EmbeddedVideoPlayer(QWidget *parent = 0) :
+        EmbeddedVideoPlayer(QWidget *parent = nullptr) :
             Phonon::VideoWidget(parent)
         {
         }
@@ -64,13 +64,13 @@
 PhononWidget::PhononWidget(QWidget *parent)
     : QWidget(parent),
     m_url(),
-    m_playButton(0),
-    m_stopButton(0),
-    m_topLayout(0),
-    m_media(0),
-    m_seekSlider(0),
-    m_audioOutput(0),
-    m_videoPlayer(0)
+    m_playButton(nullptr),
+    m_stopButton(nullptr),
+    m_topLayout(nullptr),
+    m_media(nullptr),
+    m_seekSlider(nullptr),
+    m_audioOutput(nullptr),
+    m_videoPlayer(nullptr)
 {
 }
 
diff --git a/src/panels/places/placesitem.cpp b/src/panels/places/placesitem.cpp
--- a/src/panels/places/placesitem.cpp
+++ b/src/panels/places/placesitem.cpp
@@ -37,8 +37,8 @@
     m_volume(),
     m_disc(),
     m_mtp(),
-    m_signalHandler(0),
-    m_trashDirLister(0),
+    m_signalHandler(nullptr),
+    m_trashDirLister(nullptr),
     m_bookmark()
 {
     m_signalHandler = new PlacesItemSignalHandler(this);
diff --git a/src/panels/places/placesitemsignalhandler.h b/src/panels/places/placesitemsignalhandler.h
--- a/src/panels/places/placesitemsignalhandler.h
+++ b/src/panels/places/placesitemsignalhandler.h
@@ -47,7 +47,7 @@
     Q_OBJECT
 
 public:
-    explicit PlacesItemSignalHandler(PlacesItem* item, QObject* parent = 0);
+    explicit PlacesItemSignalHandler(PlacesItem* item, QObject* parent = nullptr);
     virtual ~PlacesItemSignalHandler();
 
 public slots:
diff --git a/src/panels/places/placespanel.h b/src/panels/places/placespanel.h
--- a/src/panels/places/placespanel.h
+++ b/src/panels/places/placespanel.h
@@ -39,7 +39,7 @@
     Q_OBJECT
 
 public:
-    PlacesPanel(QWidget* parent);
+    explicit PlacesPanel(QWidget* parent);
     virtual ~PlacesPanel();
     void proceedWithTearDown();
 
diff --git a/src/panels/places/placespanel.cpp b/src/panels/places/placespanel.cpp
--- a/src/panels/places/placespanel.cpp
+++ b/src/panels/places/placespanel.cpp
@@ -58,13 +58,14 @@
 
 PlacesPanel::PlacesPanel(QWidget* parent) :
     Panel(parent),
-    m_controller(0),
-    m_model(0),
+    m_controller(nullptr),
+    m_model(nullptr),
+    m_view(nullptr),
     m_storageSetupFailedUrl(),
     m_triggerStorageSetupButton(),
     m_itemDropEventIndex(-1),
-    m_itemDropEventMimeData(0),
-    m_itemDropEvent(0)
+    m_itemDropEventMimeData(nullptr),
+    m_itemDropEvent(nullptr)
 {
 }
 
diff --git a/src/panels/places/placesview.h b/src/panels/places/placesview.h
--- a/src/panels/places/placesview.h
+++ b/src/panels/places/placesview.h
@@ -32,7 +32,7 @@
     Q_OBJECT
 
 public:
-    explicit PlacesView(QGraphicsWidget* parent = 0);
+    explicit PlacesView(QGraphicsWidget* parent = nullptr);
 
     void setIconSize(int size);
     int iconSize() const;
diff --git a/src/panels/terminal/terminalpanel.h b/src/panels/terminal/terminalpanel.h
--- a/src/panels/terminal/terminalpanel.h
+++ b/src/panels/terminal/terminalpanel.h
@@ -45,7 +45,7 @@
     Q_OBJECT
 
 public:
-    TerminalPanel(QWidget* parent = 0);
+    explicit TerminalPanel(QWidget* parent = nullptr);
     virtual ~TerminalPanel();
 
     /**
diff --git a/src/search/dolphinfacetswidget.h b/src/search/dolphinfacetswidget.h
--- a/src/search/dolphinfacetswidget.h
+++ b/src/search/dolphinfacetswidget.h
@@ -47,7 +47,7 @@
     Q_OBJECT
 
 public:
-    explicit DolphinFacetsWidget(QWidget* parent = 0);
+    explicit DolphinFacetsWidget(QWidget* parent = nullptr);
     virtual ~DolphinFacetsWidget();
 
     QString ratingTerm() const;
diff --git a/src/search/dolphinfacetswidget.cpp b/src/search/dolphinfacetswidget.cpp
--- a/src/search/dolphinfacetswidget.cpp
+++ b/src/search/dolphinfacetswidget.cpp
@@ -29,23 +29,23 @@
 
 DolphinFacetsWidget::DolphinFacetsWidget(QWidget* parent) :
     QWidget(parent),
-    m_folders(0),
-    m_documents(0),
-    m_images(0),
-    m_audio(0),
-    m_videos(0),
-    m_anytime(0),
-    m_today(0),
-    m_yesterday(0),
-    m_thisWeek(0),
-    m_thisMonth(0),
-    m_thisYear(0),
-    m_anyRating(0),
-    m_oneOrMore(0),
-    m_twoOrMore(0),
-    m_threeOrMore(0),
-    m_fourOrMore(0),
-    m_maxRating(0)
+    m_folders(nullptr),
+    m_documents(nullptr),
+    m_images(nullptr),
+    m_audio(nullptr),
+    m_videos(nullptr),
+    m_anytime(nullptr),
+    m_today(nullptr),
+    m_yesterday(nullptr),
+    m_thisWeek(nullptr),
+    m_thisMonth(nullptr),
+    m_thisYear(nullptr),
+    m_anyRating(nullptr),
+    m_oneOrMore(nullptr),
+    m_twoOrMore(nullptr),
+    m_threeOrMore(nullptr),
+    m_fourOrMore(nullptr),
+    m_maxRating(nullptr)
 {
     QButtonGroup* filetypeGroup = new QButtonGroup(this);
     m_anyType   = createRadioButton(i18nc("@option:check", "Any"), filetypeGroup);
diff --git a/src/settings/general/behaviorsettingspage.cpp b/src/settings/general/behaviorsettingspage.cpp
--- a/src/settings/general/behaviorsettingspage.cpp
+++ b/src/settings/general/behaviorsettingspage.cpp
@@ -34,15 +34,15 @@
 BehaviorSettingsPage::BehaviorSettingsPage(const QUrl& url, QWidget* parent) :
     SettingsPageBase(parent),
     m_url(url),
-    m_localViewProps(0),
-    m_globalViewProps(0),
-    m_showToolTips(0),
-    m_showSelectionToggle(0),
-    m_naturalSorting(0),
-    m_caseSensitiveSorting(0),
-    m_caseInsensitiveSorting(0),
-    m_renameInline(0),
-    m_useTabForSplitViewSwitch(0)
+    m_localViewProps(nullptr),
+    m_globalViewProps(nullptr),
+    m_showToolTips(nullptr),
+    m_showSelectionToggle(nullptr),
+    m_naturalSorting(nullptr),
+    m_caseSensitiveSorting(nullptr),
+    m_caseInsensitiveSorting(nullptr),
+    m_renameInline(nullptr),
+    m_useTabForSplitViewSwitch(nullptr)
 {
     QVBoxLayout* topLayout = new QVBoxLayout(this);
 
diff --git a/src/settings/general/statusbarsettingspage.cpp b/src/settings/general/statusbarsettingspage.cpp
--- a/src/settings/general/statusbarsettingspage.cpp
+++ b/src/settings/general/statusbarsettingspage.cpp
@@ -28,8 +28,8 @@
 
 StatusBarSettingsPage::StatusBarSettingsPage(QWidget* parent) :
     SettingsPageBase(parent),
-    m_showZoomSlider(0),
-    m_showSpaceInfo(0)
+    m_showZoomSlider(nullptr),
+    m_showSpaceInfo(nullptr)
 {
     m_showZoomSlider = new QCheckBox(i18nc("@option:check", "Show zoom slider"), this);
     m_showSpaceInfo = new QCheckBox(i18nc("@option:check", "Show space information"), this);
diff --git a/src/settings/startup/startupsettingspage.cpp b/src/settings/startup/startupsettingspage.cpp
--- a/src/settings/startup/startupsettingspage.cpp
+++ b/src/settings/startup/startupsettingspage.cpp
@@ -42,12 +42,12 @@
 StartupSettingsPage::StartupSettingsPage(const QUrl& url, QWidget* parent) :
     SettingsPageBase(parent),
     m_url(url),
-    m_homeUrl(0),
-    m_splitView(0),
-    m_editableUrl(0),
-    m_showFullPath(0),
-    m_filterBar(0),
-    m_showFullPathInTitlebar(0)
+    m_homeUrl(nullptr),
+    m_splitView(nullptr),
+    m_editableUrl(nullptr),
+    m_showFullPath(nullptr),
+    m_filterBar(nullptr),
+    m_showFullPathInTitlebar(nullptr)
 {
     QVBoxLayout* topLayout = new QVBoxLayout(this);
     QWidget* vBox = new QWidget(this);