QGVEdge.h
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1 /***************************************************************
2 QGVCore
3 Copyright (c) 2014, Bergont Nicolas, All rights reserved.
4 
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 3.0 of the License, or (at your option) any later version.
9 
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14 
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library.
17 ***************************************************************/
18 #ifndef QGVEDGE_H
19 #define QGVEDGE_H
20 
21 #include <QGraphicsItem>
22 #include <QPen>
23 
24 #include "qgv.h"
25 
26 class QGVNode;
27 class QGVScene;
28 class QGVEdgePrivate;
29 
34 class QGVCORE_EXPORT QGVEdge : public QGraphicsItem {
35  public:
36  ~QGVEdge();
37 
38  QString label() const;
39  QRectF boundingRect() const;
40  QPainterPath shape() const;
41 
42  void setLabel(const QString &label);
43 
44  void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
45  QWidget *widget = 0);
46 
47  void setAttribute(const QString &name, const QString &value);
48  QString getAttribute(const QString &name) const;
49 
50  void updateLayout();
51 
52  enum { Type = UserType + 3 };
53  int type() const { return Type; }
54 
55  private:
56  QGVEdge(QGVEdgePrivate *edge, QGVScene *scene);
57 
58  QPolygonF toArrow(const QLineF &normal) const;
59 
60  friend class QGVScene;
61  // friend class QGVSubGraph;
62 
63  QGVScene *_scene;
64  QGVEdgePrivate *_edge;
65 
66  QPainterPath _path;
67  QPen _pen;
68  QPolygonF _head_arrow;
69  QPolygonF _tail_arrow;
70 
71  QString _label;
72  QRectF _label_rect;
73 };
74 
75 #endif // QGVEDGE_H
Node item.
Definition: QGVNode.h:34
Edge item.
Definition: QGVEdge.h:34
Definition: QGVEdgePrivate.h:6
int type() const
Definition: QGVEdge.h:53
GraphViz interactive scene.
Definition: QGVScene.h:36
#define QGVCORE_EXPORT
Definition: qgv.h:9