Developer Documentation
zoomButton.hh
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49 
50 #ifndef VSI_ZOOMBUTTON_HH
51 #define VSI_ZOOMBUTTON_HH
52 
53 //== INCLUDES =================================================================
54 #include <QGraphicsPixmapItem>
55 #include <QGraphicsLayoutItem>
56 #include <QString>
57 #include <QTimer>
58 
59 //== NAMESPACES ===============================================================
60 namespace VSI {
61 
62 //== FORWARDDECLARATIONS ======================================================
63 class GraphicsScene;
64 
66 class ZoomButton : public QObject, public QGraphicsPixmapItem, public QGraphicsLayoutItem
67 {
68  Q_OBJECT
69  Q_INTERFACES(QGraphicsLayoutItem)
70 
71  public:
72 
74  enum Type
75  {
76  In,
77  Out
78  };
79 
80  public:
81 
83  ZoomButton (GraphicsScene *_scene, QGraphicsItem *_parent, Type _type);
84 
86  ~ZoomButton ();
87 
89  void activate (QPointF _pos);
90 
92  void deactivate ();
93 
95  virtual void setGeometry (const QRectF &_rect);
96 
97  protected:
98  // catch mouse hover events
99  virtual void hoverEnterEvent (QGraphicsSceneHoverEvent *_event);
100  virtual void hoverLeaveEvent (QGraphicsSceneHoverEvent *_event);
101 
102  // catch mouse press/release events
103  virtual void mousePressEvent (QGraphicsSceneMouseEvent *_event);
104  virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *_event);
105 
106  // catch mouse wheel events
107  virtual void wheelEvent (QGraphicsSceneWheelEvent *_event);
108 
109  // size information for layouting
110  virtual QSizeF sizeHint ( Qt::SizeHint _which, const QSizeF & _constraint = QSizeF()) const;
111 
112  private slots:
113  void timeout ();
114 
115  private:
116  GraphicsScene *scene_;
117 
118  Type type_;
119 
120  QTimer timer_;
121 
122  QPointF pos_;
123 };
124 
125 //=============================================================================
126 }
127 //=============================================================================
128 
129 #endif
virtual void setGeometry(const QRectF &_rect)
Sets the geometry.
Definition: zoomButton.cc:206
~ZoomButton()
Destructor.
Definition: zoomButton.cc:97
void deactivate()
Stop the timer.
Definition: zoomButton.cc:197
ZoomButton(GraphicsScene *_scene, QGraphicsItem *_parent, Type _type)
Constructor.
Definition: zoomButton.cc:70
Type
Zoom type.
Definition: zoomButton.hh:74
void activate(QPointF _pos)
Activates the timer for zoom with center at _pos (will be called if an element is moved above) ...
Definition: zoomButton.cc:186
Scene zoom in/out widget.
Definition: zoomButton.hh:66