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# diagramscene.h Example File
tools/undoframework/diagramscene.h

     /****************************************************************************
     **
     ** Copyright (C) 2007-$THISYEAR$ $TROLLTECH$. All rights reserved.
     **
     ** This file is part of the $MODULE$ of the Qt Toolkit.
     **
     ** $TROLLTECH_DUAL_LICENSE$
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #ifndef DIAGRAMSCENE_H
     #define DIAGRAMSCENE_H

     #include <QObject>
     #include <QGraphicsScene>

     class DiagramItem;
     class QGraphicsSceneDragDropEvent;
     class QGraphicsViewItem;

     class DiagramScene : public QGraphicsScene
     {
         Q_OBJECT

     public:
         DiagramScene(QObject *parent = 0);

     signals:
         void itemMoved(DiagramItem *movedItem, const QPointF &movedFromPosition);

     protected:
         void mousePressEvent(QGraphicsSceneMouseEvent *event);
         void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

     private:
         QGraphicsItem *movingItem;
         QPointF oldPos;
     };

     #endif