Developer Documentation
connection.hh
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49 
50 #ifndef VSI_CONNECTION_HH
51 #define VSI_CONNECTION_HH
52 
53 //== INCLUDES =================================================================
54 #include <QGraphicsLineItem>
55 #include <QPointF>
56 
57 //== NAMESPACES ===============================================================
58 namespace VSI {
59 
60 //== FORWARDDECLARATIONS ======================================================
61 
62 class ConnectionPoint;
63 class ElementInOut;
64 class ElementInput;
65 class ElementOutput;
66 class GraphicsScene;
67 
68 //== CLASS DEFINITION =========================================================
69 
72 class Connection : public QObject, public QGraphicsPathItem
73 {
74  Q_OBJECT
75 
76  public:
77 
79  Connection (ConnectionPoint *_start, QGraphicsScene *_scene);
80  Connection (ConnectionPoint *_start, ConnectionPoint *_end, QGraphicsScene *_scene);
81 
83  ~Connection ();
84 
86  void updatePositions ();
87 
89  ElementInput *input ();
90 
93 
95  const QPolygonF & way () const;
96 
98  void invalidate ();
99 
100  protected:
101 
102  friend class GraphicsScene;
103 
104  // mouse handling
105  void mouseMoveEvent (QGraphicsSceneMouseEvent *_event);
106  void mousePressEvent (QGraphicsSceneMouseEvent *_event);
107  void mouseReleaseEvent (QGraphicsSceneMouseEvent *_event);
108 
109  private:
110 
111  // helper to localize a connection point
112  ConnectionPoint *cPointAt (QPointF _pnt);
113 
114  // generates a curved line out of the way polygon
115  void updateLine ();
116 
117  private:
118 
119  QGraphicsItem *elementArea_;
120  GraphicsScene *scene_;
121 
122  ConnectionPoint *p1_;
123  ConnectionPoint *p2_;
124 
125  ConnectionPoint *old_;
126 
127  QPolygonF way_;
128 };
129 
130 }
131 
132 #endif
const QPolygonF & way() const
way of the connection
Definition: connection.cc:263
void invalidate()
invalidate way
Definition: connection.cc:269
Connection(ConnectionPoint *_start, QGraphicsScene *_scene)
Constructor.
Definition: connection.cc:73
void updatePositions()
called to update position on element movement
Definition: connection.cc:238
~Connection()
Destructor.
Definition: connection.cc:131
ElementInput * input()
Input of this connection.
Definition: connection.cc:245
ElementOutput * output()
Output of this connection.
Definition: connection.cc:254