---

sglCallback.hpp

/*****************************************************************************
 * SGL: A Scene Graph Library
 *
 * Copyright (C) 1997-2001  Scott McMillan   All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *****************************************************************************
 *     File: sglCallback.hpp
 *  Created: 21 February 1999
 *  Summary: execute a user defined callback during the cull traversal.
 *
 *           **** THIS DOES NOT WORK AS A DRAW CALLBACK ANY MORE ****
 *
 *        With access to the source code and ability to subclass nodes, I
 *        question the usefulness of this class. - mcmillan
 *****************************************************************************/

#ifndef __SGL_CALLBACK_HPP
#define __SGL_CALLBACK_HPP

#include <sgl.h>
#include <sglGroup.hpp>

//============================================================================

typedef void (*sglCallbackFunc)(void *);

//============================================================================

class SGL_DLL_API sglCallback : public sglGroup
{
public:
   sglCallback();
   virtual ~sglCallback();

   sglCallbackFunc getCallbackFunc() const { return m_callback_func; }

   void setCallbackFunc(sglCallbackFunc cb_func);

   void *getCallbackData() const { return m_callback_data; }

   void setCallbackData(void *data) { m_callback_data = data; }

   // see sglNode::clone() for details.
   virtual sglNode *clone(unsigned int mode) const;

   // see sglObject::printInfo() for details.
   virtual void printInfo(ostream &ostrm, const char *indent_string) const;

protected:
   // compute the bounding sphere using sglGroup version
   //virtual void computeBound();

   // sglNode::cull(f) for details
   virtual void cull(sglCull<float> &trav_state,
                     unsigned int cull_flags) const;

   // sglNode::cull(d) for details
   virtual void cull(sglCull<double> &trav_state,
                     unsigned int cull_flags) const;

   void copyTo(sglCallback *dst, unsigned int mode) const;

private:  // not implemented
   sglCallback(const sglCallback &);
   sglCallback &operator=(const sglCallback &);

protected:
   sglCallbackFunc m_callback_func;
   void *m_callback_data;
};

#endif

---