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GraphicsView_ViewTransformer.h
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1 // Copyright (C) 2013-2016 CEA/DEN, EDF R&D, OPEN CASCADE
2 //
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License, or (at your option) any later version.
7 //
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Lesser General Public License for more details.
12 //
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 //
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
18 //
19 
20 #ifndef GRAPHICSVIEW_VIEWTRANSFORMER_H
21 #define GRAPHICSVIEW_VIEWTRANSFORMER_H
22 
23 #include "GraphicsView.h"
24 
25 #include <QCursor>
26 #include <QObject>
27 
28 class QRectF;
29 class QRubberBand;
30 
31 class GraphicsView_Viewer;
32 
33 /*
34  Class : GraphicsView_ViewTransformer
35  Description : View transformer of the graphics view
36 */
37 class GRAPHICSVIEW_API GraphicsView_ViewTransformer : public QObject
38 {
39 public:
40  GraphicsView_ViewTransformer( GraphicsView_Viewer*, int type );
41  ~GraphicsView_ViewTransformer();
42 
43 public:
44  int type() const;
45 
46  static int accelKey() { return acccelKey; }
47  static void setAccelKey( int k ) { acccelKey = k; }
48 
49  static int zoomButton() { return zoomBtn; }
50  static void setZoomButton( int b ) { zoomBtn = b; }
51 
52  static int panButton() { return panBtn; }
53  static void setPanButton( int b ) { panBtn = b; }
54 
55  static int panGlobalButton() { return panGlobalBtn; }
56  static void setPanGlobalButton( int b ) { panGlobalBtn = b; }
57 
58  static int fitRectButton() { return fitRectBtn; }
59  static void setFitRectButton( int b ) { fitRectBtn = b; }
60 
61  virtual void exec();
62  virtual bool eventFilter( QObject*, QEvent* );
63 
64 protected:
65  enum TransformState { Begin, InProcess, Finished };
66  virtual void onTransform( TransformState );
67  void initTransform( bool );
68 
69  void drawRect( const QRectF& theRect );
70  void endDrawRect();
71 
72 protected:
73  static int panBtn;
74  static int zoomBtn;
75  static int fitRectBtn;
76  static int panGlobalBtn;
77 
78  static int acccelKey;
79 
80  GraphicsView_Viewer* myViewer;
81  int myType;
82  QCursor mySavedCursor;
83  bool mySavedMouseTrack;
84  QPointF myStart;
85  QPointF myCurr;
86  int myButtonState;
87  int myMajorBtn;
88 
89  QRubberBand* myRectBand;
90 };
91 
92 #endif