MeVis/ThirdParty/Sources/Inventor/inventor/lib/database/include/Inventor/sensors/SoDelayQueueSensor.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */


/*
 * Copyright (C) 1990,91,92   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      Abstract base class for all sensors that are added to the delay
 |      queue, which means that they will be executed at some time in the
 |      future (when there is idle time, or when a user-defined timeout
 |      occurs-- see SoDB::setDelaySensorTimeout()).
 |
 |      Sensors in the delay queue are sorted by priorities. A priority of
 |      0 indicates that the sensor is immediate and should be triggered
 |      immediately when it is scheduled. Sensors with other priorities
 |      are sorted by increasing priority.
 |
 |   Author(s)          : Nick Thompson, Paul Strauss, Gavin Bell
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */

#ifndef  _SO_DELAY_QUEUE_SENSOR_
#define  _SO_DELAY_QUEUE_SENSOR_


#include <Inventor/sensors/SoSensor.h>




class INVENTOR_API SoDelayQueueSensor : public SoSensor {

  public:
    SoDelayQueueSensor();
    SoDelayQueueSensor(SoSensorCB *func, void *data);

    virtual ~SoDelayQueueSensor();

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

    static uint32_t getDefaultPriority()                { return 100; }

    virtual void        schedule();
    virtual void        unschedule();
    virtual SbBool      isScheduled() const;

    virtual SbBool      isIdleOnly() const;
  SoINTERNAL public:
    void                setCounter(uint32_t c)          { counter = c;  }
    uint32_t            getCounter() const              { return counter; }

  protected:
    virtual void        trigger();

    SbBool              scheduled;      

  private:
    uint32_t            priority;       
    uint32_t            counter;        

    virtual SbBool      isBefore(const SoSensor *s) const;
};

#endif  /* _SO_DELAY_QUEUE_SENSOR_ */