SoFieldSensor.h

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**=======================================================================*/
/*=======================================================================
** Author      : Paul Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_FIELD_SENSOR_
#define  _SO_FIELD_SENSOR_
 
#include <Inventor/sensors/SoDataSensor.h>
 
class SoFieldContainer;
 
class  SoFieldSensor : public SoDataSensor {
 
 public:
  SoFieldSensor();
 
  SoFieldSensor(SoSensorCB *func, void *data);
 
  virtual ~SoFieldSensor();
 
  void                attach(SoField *field);
 
  void                detach();
 
  SoField *           getAttachedField() const        { return field; }
 
 private:
  // Override trigger to evaluate the field we're connected to, just
  // in case the trigger method doesn't get the value.
  virtual void trigger();
 
 private:
  SoField *           field;          // Field sensor is attached to
 
  // Propagates modification notification through an instance. This
  // checks to see if the field that triggered notification matches
  // the field we are attached to. (It also checks indices if necessary.)
  virtual void        notify(SoNotList *list);
 
  // Called by the attached path when it (the path) is about to be deleted
  virtual void        dyingReference();
 
  // unlocked calls used internally for correct Multithread management
  void detach(SoField* field);
};
 
#endif  /* _SO_FIELD_SENSOR_ */