Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions

commands.h Example File
tools/undoframework/commands.h

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information ([email protected])
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
 ** package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 3.0 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU General Public License version 3.0 requirements will be
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
 ** contact the sales department at [email protected].
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef COMMANDS_H
 #define COMMANDS_H

 #include <QUndoCommand>

 #include "diagramitem.h"

 class MoveCommand : public QUndoCommand
 {
 public:
     enum { Id = 1234 };

     MoveCommand(DiagramItem *diagramItem, const QPointF &oldPos,
                 QUndoCommand *parent = 0);

     void undo();
     void redo();
     bool mergeWith(const QUndoCommand *command);
     int id() const { return Id; }

 private:
     DiagramItem *myDiagramItem;
     QPointF myOldPos;
     QPointF newPos;
 };

 class DeleteCommand : public QUndoCommand
 {
 public:
     DeleteCommand(QGraphicsScene *graphicsScene, QUndoCommand *parent = 0);

     void undo();
     void redo();

 private:
     DiagramItem *myDiagramItem;
     QGraphicsScene *myGraphicsScene;
 };

 class AddCommand : public QUndoCommand
 {
 public:
     AddCommand(DiagramItem::DiagramType addType, QGraphicsScene *graphicsScene,
                QUndoCommand *parent = 0);

     void undo();
     void redo();

 private:
     DiagramItem *myDiagramItem;
     QGraphicsScene *myGraphicsScene;
     QPointF initialPosition;
 };

 QString createCommandString(DiagramItem *item, const QPointF &point);

 #endif