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32 
33 #ifndef COIN_SOVRMLDRAGSENSOR_H
34 #define COIN_SOVRMLDRAGSENSOR_H
35 
36 #include <Inventor/nodes/SoSubNode.h>
37 #include <Inventor/VRMLnodes/SoVRMLSensor.h>
38 #include <Inventor/fields/SoSFVec3f.h>
39 #include <Inventor/SbVec2s.h>
40 #include <Inventor/SbVec2f.h>
41 #include <Inventor/SbMatrix.h>
42 #include <Inventor/SbViewVolume.h>
43 
44 class SbMatrix;
45 
46 class COIN_DLL_API SoVRMLDragSensor : public SoVRMLSensor {
47   typedef SoVRMLSensor inherited;
48 
49   SO_NODE_ABSTRACT_HEADER(SoVRMLDragSensor);
50 
51 public:
52   SoSFVec3f trackPoint_changed;
53   SoSFBool autoOffset;
54 
55   //  virtual void GLRender(SoGLRenderAction * action);
56   virtual void handleEvent(SoHandleEventAction * action);
57   static void initClass(void);
58 
59 protected:
60 
61   virtual SbBool dragStart(void) = 0;
62   virtual void drag(void) = 0;
63   virtual void dragFinish(void) = 0;
64 
65   SoVRMLDragSensor(void);
66   virtual ~SoVRMLDragSensor();
67 
68   const SbVec3f & getLocalStartingPoint(void) const;
69   const SbMatrix & getLocalToWorldMatrix(void) const;
70   const SbMatrix & getWorldToLocalMatrix(void) const;
71   const SbViewVolume & getViewVolume(void) const;
72   const SbVec2f & getNormalizedLocaterPosition(void) const;
73 
74 private:
75   // FIXME: move to private class
76   SbVec3f hitpt;
77   SbMatrix obj2world;
78   SbMatrix world2obj;
79   SbVec2s mousepos;
80   SbVec2f normpos;
81   SbViewVolume viewvolume;
82 };
83 
84 #endif // ! COIN_SOVRMLDRAGSENSOR_H
85