zoomButton.hh

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\*===========================================================================*/
 
 
 
#ifndef VSI_ZOOMBUTTON_HH
#define VSI_ZOOMBUTTON_HH
 
//== INCLUDES =================================================================
#include <QGraphicsPixmapItem>
#include <QGraphicsLayoutItem>
#include <QString>
#include <QTimer>
 
//== NAMESPACES ===============================================================
namespace VSI {
 
//== FORWARDDECLARATIONS ======================================================
class GraphicsScene;
 
class ZoomButton : public QObject, public QGraphicsPixmapItem, public QGraphicsLayoutItem
{
  Q_OBJECT
  Q_INTERFACES(QGraphicsLayoutItem)
 
  public:
 
    enum Type
    {
      In,
      Out
    };
 
  public:
 
    ZoomButton (GraphicsScene *_scene, QGraphicsItem *_parent, Type _type);
 
    ~ZoomButton ();
 
    void activate (QPointF _pos);
 
    void deactivate ();
 
    virtual void setGeometry (const QRectF &_rect);
 
  protected:
     // catch mouse hover events
    virtual void hoverEnterEvent (QGraphicsSceneHoverEvent *_event);
    virtual void hoverLeaveEvent (QGraphicsSceneHoverEvent *_event);
 
    // catch mouse press/release events
    virtual void mousePressEvent (QGraphicsSceneMouseEvent *_event);
    virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *_event);
 
    // catch mouse wheel events
    virtual void wheelEvent (QGraphicsSceneWheelEvent *_event);
 
    // size information for layouting
    virtual QSizeF sizeHint ( Qt::SizeHint _which, const QSizeF & _constraint = QSizeF()) const;
 
  private slots:
    void timeout ();
 
  private:
    GraphicsScene *scene_;
 
    Type type_;
 
    QTimer timer_;
 
    QPointF pos_;
};
 
//=============================================================================
}
//=============================================================================
 
#endif