commands.h Example File

 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation ([email protected])
 **
 ** This file is part of the demonstration applications of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** No Commercial Usage
 ** This file contains pre-release code and may not be distributed.
 ** You may use this file in accordance with the terms and conditions
 ** contained in the Technology Preview License Agreement accompanying
 ** this package.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU Lesser General Public License version 2.1 requirements
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain additional
 ** rights.  These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at [email protected].
 **
 **
 **
 **
 **
 **
 **
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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();
     void redo();

 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();
     void redo();

 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();
     void redo();

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

 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();
     void redo();

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

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

 #endif // COMMANDS_H