Qt 5.6 | Qt Widgets | Undo Framework | commands.h Example File

Qt 5.6.2 Reference Documentation

# commands.h Example File

tools/undo/commands.h

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
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      ** Alternatively, this file may be used under the terms of the GNU Lesser
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      #ifndef COMMANDS_H
      #define COMMANDS_H

      #include <QUndoCommand>
      #include "document.h"

      class AddShapeCommand : public QUndoCommand
      {
      public:
          AddShapeCommand(Document *doc, const Shape &shape, QUndoCommand *parent = 0);
          void undo() Q_DECL_OVERRIDE;
          void redo() Q_DECL_OVERRIDE;

      private:
          Document *m_doc;
          Shape m_shape;
          QString m_shapeName;
      };

      class RemoveShapeCommand : public QUndoCommand
      {
      public:
          RemoveShapeCommand(Document *doc, const QString &shapeName, QUndoCommand *parent = 0);
          void undo() Q_DECL_OVERRIDE;
          void redo() Q_DECL_OVERRIDE;

      private:
          Document *m_doc;
          Shape m_shape;
          QString m_shapeName;
      };

      class SetShapeColorCommand : public QUndoCommand
      {
      public:
          SetShapeColorCommand(Document *doc, const QString &shapeName, const QColor &color,
                                  QUndoCommand *parent = 0);

          void undo() Q_DECL_OVERRIDE;
          void redo() Q_DECL_OVERRIDE;

          bool mergeWith(const QUndoCommand *command) Q_DECL_OVERRIDE;
          int id() const Q_DECL_OVERRIDE;

      private:
          Document *m_doc;
          QString m_shapeName;
          QColor m_oldColor;
          QColor m_newColor;
      };

      class SetShapeRectCommand : public QUndoCommand
      {
      public:
          SetShapeRectCommand(Document *doc, const QString &shapeName, const QRect &rect,
                                  QUndoCommand *parent = 0);

          void undo() Q_DECL_OVERRIDE;
          void redo() Q_DECL_OVERRIDE;

          bool mergeWith(const QUndoCommand *command) Q_DECL_OVERRIDE;
          int id() const Q_DECL_OVERRIDE;

      private:
          Document *m_doc;
          QString m_shapeName;
          QRect m_oldRect;
          QRect m_newRect;
      };

      #endif // COMMANDS_H