SoCallbackList.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: 
 * 
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 *
 */
 
 
/*
 * Copyright (C) 1991   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:
 |      Callback list - a list of callback functions and associated data,
 |   with member functions to add, remove, and invoke callbacks.
 |      
 |   Classes:   SoCallbackList
 |
 |   Author(s): David Mott
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_CALLBACK_LIST_
#define  _SO_CALLBACK_LIST_
 
#include <Inventor/SbPList.h>
 
 
typedef void INVENTOR_API SoCallbackListCB(void *userData, void *callbackData);
 
 
 
class INVENTOR_API SoCallbackList {
    
  public:
 
    SoCallbackList();
    ~SoCallbackList();
    
 
    void    addCallback(SoCallbackListCB *f, void *userData = NULL);
    void    removeCallback(SoCallbackListCB *f, void *userData = NULL);
    
    void    clearCallbacks()                        { list.truncate(0); }
    int     getNumCallbacks() const                 { return list.getLength(); }
 
    void    invokeCallbacks(void *callbackData);
 
  private:
  
    SbPList     list;
};
 
#endif  /* _SO_CALLBACK_LIST_ */