zoomButton.hh

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/*===========================================================================*\
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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