SoDelayQueueSensor.h

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/*=======================================================================
** Author      : Nick Thompson (MMM yyyy)
** Modified by : Paul Strauss (MMM yyyy)
** Modified by : Gavin Bell (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_DELAY_QUEUE_SENSOR_
#define  _SO_DELAY_QUEUE_SENSOR_

//
//  Class: SoDelayQueueSensor
//
//
 
#include <Inventor/sensors/SoSensor.h>

class  SoDelayQueueSensor : public SoSensor {
 
 public:
  SoDelayQueueSensor();
  SoDelayQueueSensor(SoSensorCB *func, void *data);
 
  // Destructor
#ifndef HIDDEN_FROM_DOC
  virtual ~SoDelayQueueSensor();
#endif // HIDDEN_FROM_DOC

  void                setPriority(uint32_t pri);
  uint32_t            getPriority() const             { return priority; }

  static uint32_t getDefaultPriority()                { return 100; }

  virtual void        schedule();
  virtual void        unschedule();
 
  // This method is overriden by IdleSensors to tell sensor manager
  // that they should only be processed when there really is idle
  // time (and not when the delay queue timeout expires).
  virtual SbBool      isIdleOnly() const;
 private:
  // Set/inquire counter when sensor was last triggered. This allows
  // the sensor manager to avoid triggering a sensor more than once
  // during the same call to processDelayQueue().
  void                setCounter(uint32_t c)          { counter = c;  }
  uint32_t            getCounter() const              { return counter; }
  void                setPreserveOrder(bool preserveOrder);
 
 private:
  uint32_t            priority;       // Sensor priority
  uint32_t            counter;        // Used by sensor manager
 
  typedef  SbBool (*OrderingFunction)(uint32_t, uint32_t);
  OrderingFunction m_orderingFn;
 
  // Returns TRUE if this sensor should precede sensor s in the delay
  // queue: it must have a lower priority number than s.
  virtual SbBool      isBefore(const SoSensor *s) const;
  static  SbBool      strictOrder(uint32_t p1, uint32_t p2);
  static  SbBool      looseOrder(uint32_t p1, uint32_t p2);
};
 
#endif  /* _SO_DELAY_QUEUE_SENSOR_ */