Developer Documentation
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Friends Macros Modules Pages
connection.hh
1 /*===========================================================================*\
2 * *
3 * OpenFlipper *
4  * Copyright (c) 2001-2015, RWTH-Aachen University *
5  * Department of Computer Graphics and Multimedia *
6  * All rights reserved. *
7  * www.openflipper.org *
8  * *
9  *---------------------------------------------------------------------------*
10  * This file is part of OpenFlipper. *
11  *---------------------------------------------------------------------------*
12  * *
13  * Redistribution and use in source and binary forms, with or without *
14  * modification, are permitted provided that the following conditions *
15  * are met: *
16  * *
17  * 1. Redistributions of source code must retain the above copyright notice, *
18  * this list of conditions and the following disclaimer. *
19  * *
20  * 2. Redistributions in binary form must reproduce the above copyright *
21  * notice, this list of conditions and the following disclaimer in the *
22  * documentation and/or other materials provided with the distribution. *
23  * *
24  * 3. Neither the name of the copyright holder nor the names of its *
25  * contributors may be used to endorse or promote products derived from *
26  * this software without specific prior written permission. *
27  * *
28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
31  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
32  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
33  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
34  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
35  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
36  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
37  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
38  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
39 * *
40 \*===========================================================================*/
41 
42 /*===========================================================================*\
43 * *
44 * $Revision$ *
45 * $LastChangedBy$ *
46 * $Date$ *
47 * *
48 \*===========================================================================*/
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
Connection(ConnectionPoint *_start, QGraphicsScene *_scene)
Constructor.
Definition: connection.cc:73
ElementInput * input()
Input of this connection.
Definition: connection.cc:245
const QPolygonF & way() const
way of the connection
Definition: connection.cc:263
ElementOutput * output()
Output of this connection.
Definition: connection.cc:254
void updatePositions()
called to update position on element movement
Definition: connection.cc:238
void invalidate()
invalidate way
Definition: connection.cc:269
~Connection()
Destructor.
Definition: connection.cc:131