diagramscene.h

奇趣公司比较新的qt/emd版本

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#ifndef DIAGRAMSCENE_H
#define DIAGRAMSCENE_H

#include <QObject>
#include <QGraphicsScene>

class QGraphicsSceneDragDropEvent;
class DiagramItem;
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