/**************************************************************************\
 *
 *  This file is part of the Coin 3D visualization library.
 *  Copyright (C) 1998-2004 by Systems in Motion.  All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  ("GPL") version 2 as published by the Free Software Foundation.
 *  See the file LICENSE.GPL at the root directory of this source
 *  distribution for additional information about the GNU GPL.
 *
 *  For using Coin with software that can not be combined with the GNU
 *  GPL, and for taking advantage of the additional benefits of our
 *  support services, please contact Systems in Motion about acquiring
 *  a Coin Professional Edition License.
 *
 *  See <URL:http://www.coin3d.org/> for more information.
 *
 *  Systems in Motion, Teknobyen, Abels Gate 5, 7030 Trondheim, NORWAY.
 *  <URL:http://www.sim.no/>.
 *
\**************************************************************************/

#ifndef COIN_SOONESHOT_H
#define COIN_SOONESHOT_H

#include <Inventor/engines/SoSubEngine.h>
#include <Inventor/engines/SoEngineOutput.h>
#include <Inventor/fields/SoSFTime.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFTrigger.h>
#include <Inventor/fields/SoSFBitMask.h>


class COIN_DLL_API SoOneShot : public SoEngine {
  typedef SoEngine inherited;

  SO_ENGINE_HEADER(SoOneShot);

public:
  static void initClass(void);
  SoOneShot(void);

  enum Flags {RETRIGGERABLE=1, HOLD_FINAL=2};

  SoSFTime timeIn;
  SoSFTime duration;
  SoSFTrigger trigger;
  SoSFBitMask flags;
  SoSFBool disable;

  SoEngineOutput timeOut;  // SoSFTime
  SoEngineOutput isActive; // SoSFBool
  SoEngineOutput ramp;     // SoSFFloat

protected:
  ~SoOneShot();

private:
  virtual void evaluate(void);
  virtual void inputChanged(SoField * which);
  virtual void writeInstance(SoOutput * out);

  SbTime holdduration;
  float holdramp;
  SbTime starttime;
  SbBool running;
};

#endif // !COIN_SOONESHOT_H
