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DtPinchGesture.h
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1 /******************************************************************************
2 ** Copyright (c) 2015 MAK Technologies, Inc.
3 ** All rights reserved.
4 ******************************************************************************/
5 
9 
10 #pragma once
11 
12 #include <vrvCore/vrvCore.h>
13 
14 #include <vrvGraphicsUtils/DtLine2D.h>
15 
16 namespace makVrv
17 {
26  class DT_DLL_VRVCORE DtPinchGesture
27  {
28  public:
29 
32  typedef DtVector2<float32> DtVector2f;
33  typedef DtLine2D<float32> DtLine2f;
34 
36  enum PinchGestureState
37  {
38  PinchGestureStateUnspecified
39  , PinchGestureStateBegin
40  , PinchGestureStateUpdate
41  , PinchGestureStateEnd
42  };
43 
45  DtPinchGesture();
46 
48  DtPinchGesture( const DtPinchGesture& orig );
49 
51  DtPinchGesture& operator=( const DtPinchGesture& rhs );
52 
54  virtual ~DtPinchGesture();
55 
57  virtual PinchGestureState gestureState() const;
58 
61  virtual void setGestureState( PinchGestureState gestureState );
62 
63 
66  virtual float scaleFactor() const;
67 
70  virtual float lastScaleFactor() const;
71 
74  virtual float totalScaleFactor() const;
75 
78  virtual float rotationAngle() const;
79 
82  virtual float lastRotationAngle() const;
83 
86  virtual float totalRotationAngle() const;
87 
90  virtual DtVector2f startCenterPoint() const;
91 
94  virtual DtVector2f centerPoint() const;
95 
98  virtual DtVector2f lastCenterPoint() const;
99 
102  virtual void processTouchEvent( PinchGestureState gestureState,
103  const DtVector2f& p0, const DtVector2f& p1 );
104 
105  protected:
106 
109  virtual void computeCurrentScaleFactor( PinchGestureState gestureState,
110  const DtVector2f& p0, const DtVector2f& p1 );
111 
112  protected:
113  bool myInitialized;
114  PinchGestureState myGestureState;
115 
116  DtLine2f myStartLine;
117  DtLine2f myLastLine;
118 
119  float myScaleFactor;
120  float myLastScaleFactor;
121  float myTotalScaleFactor;
122 
123  float myRotationAngle;
124  float myLastRotationAngle;
125  float myTotalRotationAngle;
126 
127  DtVector2f myCenterPoint;
128  DtVector2f myStartCenterPoint;
129  DtVector2f myLastCenterPoint;
130  };
131 }
Document ID: Generated on Fri Apr 26 21:53:14 EDT 2019 from SVN revision 197883
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