#ifndef COIN_SCXMLTRANSITIONELT_H
#define COIN_SCXMLTRANSITIONELT_H

/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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\**************************************************************************/

#include <Inventor/scxml/ScXMLElt.h>
#include <Inventor/tools/SbPimplPtr.h>

class ScXMLEvent;
class ScXMLExecutableElt;
class ScXMLStateMachine;

class COIN_DLL_API ScXMLTransitionElt : public ScXMLElt {
  typedef ScXMLElt inherited;
  SCXML_ELEMENT_HEADER(ScXMLTransitionElt)
public:
  static void initClass(void);
  static void cleanClass(void);

  ScXMLTransitionElt(void);
  virtual ~ScXMLTransitionElt(void);

  // XML attributes
  virtual void setEventAttribute(const char * event);
  const char * getEventAttribute(void) const { return this->event; }

  virtual void setCondAttribute(const char * cond);
  const char * getCondAttribute(void) const { return this->cond; }

  virtual void setTargetAttribute(const char * target);
  const char * getTargetAttribute(void) const { return this->target; }

  virtual void setAnchorAttribute(const char * anchor);
  const char * getAnchorAttribute(void) const { return this->anchor; }

  virtual SbBool handleXMLAttributes(void);

  virtual void copyContents(const ScXMLElt * rhs);

  virtual const ScXMLElt * search(const char * attrname, const char * attrvalue) const;

  // predicates
  SbBool isConditionLess(void) const;
  SbBool isTargetLess(void) const;
  SbBool isSelfReferencing(void) const;

  // check
  virtual SbBool isEventMatch(const ScXMLEvent * event) const;
  // isConditionMatch() ?
  virtual SbBool evaluateCondition(ScXMLStateMachine * statemachine);

  // executable content
  virtual int getNumExecutables(void) const;
  virtual ScXMLExecutableElt * getExecutable(int idx) const;
  virtual void addExecutable(ScXMLExecutableElt * executable);
  virtual void removeExecutable(ScXMLExecutableElt * executable);
  virtual void clearAllExecutables(void);

  virtual void execute(ScXMLStateMachine * statemachine) const;

protected:
  char * event;
  char * cond;
  char * target;
  char * anchor;

  SbBool needprefixmatching;
  SbName eventkey;
  SbName targetkey;

private:
  ScXMLTransitionElt(const ScXMLTransitionElt & rhs); // N/A
  ScXMLTransitionElt & operator = (const ScXMLTransitionElt & rhs); // N/A

  class PImpl;
  SbPimplPtr<PImpl> pimpl;

}; // ScXMLTransitionElt

#endif // !COIN_SCXMLTRANSITIONELT_H
