SoScaleGestureEvent.h

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/*=======================================================================
** Author      : ... (MMM yyyy)
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/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
#ifndef  _SO_SCALE_GESTURE_EVENT_
#define  _SO_SCALE_GESTURE_EVENT_
 
#include <Inventor/SbBasic.h>
#include <Inventor/events/SoSubEvent.h>
#include <Inventor/gestures/events/SoGestureEvent.h>

class  SoScaleGestureEvent : public SoGestureEvent {
 
  SO_EVENT_HEADER();
 
public :

  SoScaleGestureEvent();
 
  #ifndef HIDDEN_FROM_DOC
  virtual ~SoScaleGestureEvent();
  #endif // HIDDEN_FROM_DOC

  float getScaleFactor() const;
   
  float getDeltaScaleFactor() const;
 
private:
  static void initClass();
  static void exitClass();

  float getFirstDistance() const;
  
  void setFirstDistance(float d);

  void setScaleFactor(float r);

  void setDeltaScaleFactor(float r);
  
private :
  float m_deltaScaleFactor;
  // The ratio between the current fingers distance and the first distance
  float m_scaleFactor;
  // The distance between the two fingers after the second DOWN event.
  float m_firstDistance;
};
 
#endif /* _SO_SCALE_GESTURE_EVENT_ */