#ifndef COIN_SOVERTEXATTRIBUTEELEMENT_H
#define COIN_SOVERTEXATTRIBUTEELEMENT_H

/**************************************************************************\
 *
 *  This file is part of the Coin 3D visualization library.
 *  Copyright (C) by Kongsberg Oil & Gas Technologies.
 *
 *  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 Kongsberg Oil & Gas Technologies
 *  about acquiring a Coin Professional Edition License.
 *
 *  See http://www.coin3d.org/ for more information.
 *
 *  Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
 *  http://www.sim.no/  sales@sim.no  coin-support@coin3d.org
 *
\**************************************************************************/

#include <Inventor/elements/SoAccumulatedElement.h>
#include <Inventor/elements/SoSubElement.h>
#include <Inventor/tools/SbPimplPtr.h>

class SoState;
class SoMField;
class SoVertexAttributeData;
class SoVertexAttributeElementP;

class COIN_DLL_API SoVertexAttributeElement : public SoAccumulatedElement {
  typedef SoAccumulatedElement inherited;
  SO_ELEMENT_HEADER(SoVertexAttributeElement);

public:
  static void initClass(void);
  virtual void init(SoState * state);

  virtual void push(SoState * state);
  static void add(SoState * const state, SoVertexAttributeData * attribdata);
                  
  static const SoVertexAttributeElement * getInstance(SoState * const state);
  unsigned int getNumAttributes(void) const;

  typedef const char * Key;
  typedef SoVertexAttributeData * Type;
  typedef void AttributeApplyFunc(const Key & key, const Type & obj, void * closure);
  void applyToAttributes(AttributeApplyFunc * func, void * closure) const;

protected:
  virtual ~SoVertexAttributeElement();

  virtual void addElt(SoVertexAttributeData * attribdata);

private:
  // needed by SbPimplPtr
  SoVertexAttributeElement(const SoVertexAttributeElement & rhs); // N/A
  SoVertexAttributeElement & operator = (const SoVertexAttributeElement & rhs); // N/A

  SbPimplPtr<SoVertexAttributeElementP> pimpl;
};

#endif // COIN_SOVERTEXATTRIBUTEELEMENT_H
