diff --git a/src/Commands.h b/src/Commands.h
index a9e50c7..2980f41 100644
--- a/src/Commands.h
+++ b/src/Commands.h
@@ -1,552 +1,552 @@
 /********************************************************************************
  * Copyright (C) 2011-2015 by Stephen Allewell                                  *
  * steve.allewell@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.                                          *
  ********************************************************************************/
 
 
 /**
  * @file
  * Header file for the QUndoCommand derived classes.
  */
 
 
 #ifndef Commands_H
 #define Commands_H
 
 
 #include <QUndoCommand>
 #include <QWidget>
 
 #include "SymbolLibrary.h"
 
 
 class QMimeData;
 
 class Editor;
 
 
 /**
  * @brief Move to command class.
  *
  * Implement a move to operation on the QPainterPath for the current symbol.
  * If this is the first operation it updates the start position of the path, otherwise
  * it ends the current sub path and starts a new sub path at the specified point.
  *
  * The original path is stored for a possible undo.
  */
 class MoveToCommand : public QUndoCommand
 {
 public:
     MoveToCommand(Editor *editor, const QPointF &to);
     virtual ~MoveToCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;  /**< pointer to the editor */
     QPointF         m_to;       /**< point to move to */
     QPainterPath    m_path;     /**< original path to be restored on undo */
 };
 
 
 /**
  * @brief Line to command class.
  *
  * Implement a line to operation on the QPainterPath for the current symbol.
  * The line is added to the current sub path.
  *
  * The original path is stored for a possible undo.
  */
 class LineToCommand : public QUndoCommand
 {
 public:
     LineToCommand(Editor *editor, const QPointF &to);
     virtual ~LineToCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;  /**< pointer to the editor */
     QPointF         m_to;       /**< point to draw to */
     QPainterPath    m_path;     /**< original path to be restored on undo */
 };
 
 
 /**
  * @brief Cubic to command class.
  *
  * Implement a cubic to operation on the QPainterPath for the current symbol.
  * The cubic is added to the current sub path.
  *
  * The original path is stored for a possible undo.
  */
 class CubicToCommand : public QUndoCommand
 {
 public:
     CubicToCommand(Editor *editor, const QPointF &control1, const QPointF &control2, const QPointF &to);
     virtual ~CubicToCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;  /**< pointer to the editor */
     QPointF         m_control1; /**< first control point */
     QPointF         m_control2; /**< second control point */
     QPointF         m_to;       /**< end point */
     QPainterPath    m_path;     /**< original path to be restored on undo */
 };
 
 
 /**
  * @brief Rectangle command class.
  *
  * Implement a rectangle operation on the QPainterPath for the current symbol.
  * The current sub path is closed and the rectangle is added as a new sub path as a
  * series of line to operations.
  *
  * The original path is stored for a possible undo.
  */
 class RectangleCommand : public  QUndoCommand
 {
 public:
     RectangleCommand(Editor *editor, const QPointF &from, const QPointF &to);
     virtual ~RectangleCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;  /**< pointer to the editor */
     QPointF         m_from;     /**< first corner */
     QPointF         m_to;       /**< second corner */
     QPainterPath    m_path;     /**< original path to be restored on undo */
 };
 
 
 /**
  * @brief Ellipse command class.
  *
  * Implement an ellipse operation on the QPainterPath for the current symbol.
  * The current sub path is closed and the ellipse is added as a new sub path as a
  * series of cubic to operations.
  *
  * The original path is stored for a possible undo.
  */
 class EllipseCommand : public QUndoCommand
 {
 public:
     EllipseCommand(Editor *editor, const QPointF &from, const QPointF &to);
     virtual ~EllipseCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;  /**< pointer to the editor */
     QPointF         m_from;     /**< first corner */
     QPointF         m_to;       /**< second corner */
     QPainterPath    m_path;     /**< original path to be restored on undo */
 };
 
 
 /**
  * @brief Move point command class.
  *
  * Implement moving a control point in the m_points list from one position to
  * another. The Editor QPainterPath needs to be reconstructed with the moved position.
  *
  * The original position is stored for a possible undo.
  */
 class MovePointCommand : public QUndoCommand
 {
 public:
     MovePointCommand(Editor *editor, int index, const QPointF &from, const QPointF &to);
     virtual ~MovePointCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;  /**< pointer to the editor */
     int             m_index;    /**< index of the point in m_editor->m_points */
     QPointF         m_from;     /**< original position */
     QPointF         m_to;       /**< destination position */
 };
 
 
 /**
  * @brief Update symbol command class;
  *
  * Implement updating a symbol in the library using the index specified. The index may
  * be 0 for new symbols and a new index will be generated by the library.
  *
  * The original Symbol is stored for a possible undo.
  */
 class UpdateSymbolCommand : public QUndoCommand
 {
 public:
     UpdateSymbolCommand(SymbolLibrary *library, qint16 index, const Symbol &symbol);
     virtual ~UpdateSymbolCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     SymbolLibrary   *m_symbolLibrary;   /**< pointer to the symbol library */
     qint16          m_index;            /**< index of the symbol in the library */
     Symbol          m_symbol;           /**< the updated symbol */
     Symbol          m_originalSymbol;   /**< original symbol to be restored on undo */
 };
 
 
 /**
  * @brief Import library command class.
  *
  * Implement importing the symbols from one library into the current library. The indexes
  * from the import library are ignored and new indexes are generated by the current library.
  *
  * The list of generated indexes is stored for a possible undo.
  */
 class ImportLibraryCommand : public QUndoCommand
 {
 public:
     ImportLibraryCommand(SymbolLibrary *library, SymbolLibrary *imported);
     virtual ~ImportLibraryCommand();
 
-    virtual void undo();
-    virtual void redo();
+    virtual void undo() Q_DECL_OVERRIDE;
+    virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     SymbolLibrary   *m_symbolLibrary;   /**< pointer to the symbol library */
     SymbolLibrary   *m_imported;        /**< pointer to the imported library */
     QList<qint16>   m_addedIndexes;     /**< indexes of the symbols imported to be removed on undo */
 };
 
 
 /**
  * @brief Rotate left command class.
  *
  * Implement the rotation of the QPainterPath for the current symbol left (counter clockwise).
  *
  * Nothing is stored for undo as this is implemented as a rotate right.
  */
 class RotateLeftCommand : public QUndoCommand
 {
 public:
     explicit RotateLeftCommand(Editor *editor);
     virtual ~RotateLeftCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor  *m_editor;                  /**< pointer to the editor */
 };
 
 
 /**
  * @brief Rotate right command class.
  *
  * Implement the rotation of the QPainterPath for the current symbol right (clockwise).
  *
  * Nothing is stored for undo as this is implemented as a rotate left.
  */
 class RotateRightCommand : public QUndoCommand
 {
 public:
     explicit RotateRightCommand(Editor *editor);
     virtual ~RotateRightCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor  *m_editor;                  /**< pointer to the editor */
 };
 
 
 /**
  * @brief Flip horizontal command class.
  *
  * Implement the flipping of the QPainterPath for the current symbol horizontally about
  * the vertical axis passing through the center line of the symbol.
  *
  * Nothing is stored for undo as this implemented by another flip horizontal.
  */
 class FlipHorizontalCommand : public QUndoCommand
 {
 public:
     explicit FlipHorizontalCommand(Editor *editor);
     virtual ~FlipHorizontalCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor  *m_editor;                  /**< pointer to the editor */
 };
 
 
 /**
  * @brief Flip vertical command class.
  *
  * Implement the flipping of the QPainterPath for the current symbol vertically about
  * the horizontal axis passing through the center line of the symbol.
  *
  * Nothing is stored for undo as this is implemented by another flip vertical.
  */
 class FlipVerticalCommand : public QUndoCommand
 {
 public:
     explicit FlipVerticalCommand(Editor *editor);
     virtual ~FlipVerticalCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor  *m_editor;                  /**< pointer to the editor */
 };
 
 
 /**
  * @brief Scale to preferred size class.
  *
  * Implement scaling of the current symbol so that it fits within the preferred size rectangle.
  * No changes are made to symbols that are already inside it.
  */
 class ScalePreferredCommand : public QUndoCommand
 {
 public:
     ScalePreferredCommand(Editor *editor, const QPainterPath &originlSymbol, int gridElements, int borderSize);
     virtual ~ScalePreferredCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;          /**< pointer to the editor */
     QPainterPath    m_originalSymbol;   /**< original symbol path used for undo */
     int             m_gridElements;     /**< the number of elements in a grid side */
     int             m_borderSize;       /**< the number of elements in a border */
 };
 
 
 /**
  * @brief Change the fill state command class.
  *
  * Implement changing the fill state of the current symbol.
  *
  * The original state is stored for a possible undo.
  */
 class ChangeFilledCommand : public QUndoCommand
 {
 public:
     ChangeFilledCommand(Editor *editor, bool from, bool to);
     virtual ~ChangeFilledCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor  *m_editor;                  /**< pointer to the editor */
     bool    m_from;                     /**< original setting */
     bool    m_to;                       /**< new setting */
 };
 
 
 /**
  * @brief Change the fill rule command class.
  *
  * Implement changing the fill rule of the QPainterPath for the current symbol.
  *
  * The original fill rule is stored for a possible undo.
  */
 class ChangeFillRuleCommand : public QUndoCommand
 {
 public:
     ChangeFillRuleCommand(Editor *editor, Qt::FillRule from, Qt::FillRule to);
     virtual ~ChangeFillRuleCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;          /**< pointer to the Editor */
     Qt::FillRule    m_from;             /**< original setting */
     Qt::FillRule    m_to;               /**< new setting */
 };
 
 
 /**
  * @brief Change the pen cap style command.
  *
  * Implement changing the line cap style for the current symbol.
  *
  * The original style is stored for a possible undo.
  */
 class ChangeCapStyleCommand : public QUndoCommand
 {
 public:
     ChangeCapStyleCommand(Editor *editor, Qt::PenCapStyle from, Qt::PenCapStyle to);
     virtual ~ChangeCapStyleCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;          /**< pointer to the Editor */
     Qt::PenCapStyle m_from;             /**< original setting */
     Qt::PenCapStyle m_to;               /**< new setting */
 };
 
 
 /**
  * @brief Change the pen join style command.
  *
  * Implement changing the line join style for the current symbol.
  *
  * The original style is stored for a possible undo.
  */
 class ChangeJoinStyleCommand : public QUndoCommand
 {
 public:
     ChangeJoinStyleCommand(Editor *editor, Qt::PenJoinStyle from, Qt::PenJoinStyle to);
     virtual ~ChangeJoinStyleCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     Editor              *m_editor;      /**< pointer to the Editor */
     Qt::PenJoinStyle    m_from;         /**< original setting */
     Qt::PenJoinStyle    m_to;           /**< new setting */
 };
 
 
 /**
  * @brief Delete a symbol from the library command.
  *
  * Implement deleting a symbol from the library using the index specified.
  *
  * The index and the symbol removed are stored for a possible undo.
  */
 class DeleteSymbolCommand : public QUndoCommand
 {
 public:
     DeleteSymbolCommand(SymbolLibrary *library, qint16 index);
     virtual ~DeleteSymbolCommand() = default;
 
     virtual void undo() Q_DECL_OVERRIDE;
     virtual void redo() Q_DECL_OVERRIDE;
 
 private:
     SymbolLibrary   *m_symbolLibrary;   /**< pointer to the SymbolLibrary */
     qint16          m_index;            /**< index of the symbol */
     Symbol          m_symbol;           /**< the symbol deleted, stored for undo */
 };
 
 
 /**
  * @brief Increase the line width of the path.
  *
  * Implement increasing the line width for the current symbol. Multiple increases
  * of the width are merged together to allow for a single undo or redo operation.
  *
  * The original width is stored for a possible undo.
  */
 class IncreaseLineWidthCommand : public QUndoCommand
 {
 public:
     IncreaseLineWidthCommand(Editor *editor, qreal from, qreal to);
     virtual ~IncreaseLineWidthCommand() = default;
 
     virtual void redo() Q_DECL_OVERRIDE;
     virtual void undo() Q_DECL_OVERRIDE;
 
     virtual int id() const Q_DECL_OVERRIDE;
     virtual bool mergeWith(const QUndoCommand *command) Q_DECL_OVERRIDE;
 
 private:
     Editor      *m_editor;              /**< pointer to the Editor */
     qreal       m_from;                 /**< the original setting */
     qreal       m_to;                   /**< the new setting, this may be changed by merging commands */
 };
 
 
 /**
  * @brief Decrease the line width of the path.
  *
  * Implement decreasing the line width for the current symbol. Multiple decreases
  * of the width are merged together to allow for a single undo or redo operation.
  *
  * The original width is stored for a possible undo.
  */
 class DecreaseLineWidthCommand : public QUndoCommand
 {
 public:
     DecreaseLineWidthCommand(Editor *editor, qreal from, qreal to);
     virtual ~DecreaseLineWidthCommand() = default;
 
     virtual void redo() Q_DECL_OVERRIDE;
     virtual void undo() Q_DECL_OVERRIDE;
 
     virtual int id() const Q_DECL_OVERRIDE;
     virtual bool mergeWith(const QUndoCommand *command) Q_DECL_OVERRIDE;
 
 private:
     Editor      *m_editor;              /**< pointer to the Editor */
     qreal       m_from;                 /**< the original setting */
     qreal       m_to;                   /**< the new setting, this may be changed by merging commands */
 };
 
 
 /**
  * @brief Add new symbols dragged from another instance of the SymbolEditor.
  *
  * Allows copying of symbols from one symbol library to another using drag and drop.
  */
 class DragAndDropCommand : public QUndoCommand
 {
 public:
     DragAndDropCommand(SymbolLibrary *library, const QMimeData *mimeData);
 
     virtual void redo() Q_DECL_OVERRIDE;
     virtual void undo() Q_DECL_OVERRIDE;
 
 private:
     SymbolLibrary   *m_library;
     QList<Symbol>   m_symbols;
     QList<qint16>   m_indexes;
 };
 
 
 /**
  * @brief Add a fonted character as a symbol.
  *
  * Allows a character to be added after selection from the KCharSelect dialog.
  */
 class AddCharacterCommand : public QUndoCommand
 {
 public:
     AddCharacterCommand(Editor *editor, const QPainterPath &path);
 
     virtual void redo() Q_DECL_OVERRIDE;
     virtual void undo() Q_DECL_OVERRIDE;
 
 private:
     Editor          *m_editor;
     QPainterPath    m_path;
 };
 
 
 #endif