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OgreFrameListener.h

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00001 /*
00002 -----------------------------------------------------------------------------
00003 This source file is part of OGRE
00004     (Object-oriented Graphics Rendering Engine)
00005 For the latest info, see http://ogre.sourceforge.net/
00006 
00007 Copyright © 2000-2002 The OGRE Team
00008 Also see acknowledgements in Readme.html
00009 
00010 This program is free software; you can redistribute it and/or modify it under
00011 the terms of the GNU Lesser General Public License as published by the Free Software
00012 Foundation; either version 2 of the License, or (at your option) any later
00013 version.
00014 
00015 This program is distributed in the hope that it will be useful, but WITHOUT
00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
00018 
00019 You should have received a copy of the GNU Lesser General Public License along with
00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
00022 http://www.gnu.org/copyleft/lesser.txt.
00023 -----------------------------------------------------------------------------
00024 */
00025 #ifndef __FrameListener_H__
00026 #define __FrameListener_H__
00027 
00028 
00029 #include "OgrePrerequisites.h"
00030 
00031 namespace Ogre {
00032 
00035     struct FrameEvent
00036     {
00041         Real timeSinceLastEvent;
00045         Real timeSinceLastFrame;
00046     };
00047 
00048 
00067     class _OgreExport FrameListener
00068     {
00069         /*
00070         Note that this could have been an abstract class, but I made
00071         the explicit choice not to do this, because I wanted to give
00072         people the option of only implementing the methods they wanted,
00073         rather than having to create 'do nothing' implementations for
00074         those they weren't interested in. As such this class follows
00075         the 'Adapter' classes in Java rather than pure interfaces.
00076         */
00077     public:
00083         virtual bool frameStarted(const FrameEvent& evt) { return true; }
00089         virtual bool frameEnded(const FrameEvent& evt) { return true; }
00090 
00091         virtual ~FrameListener() {}
00092         
00093     };
00094 }
00095 
00096 #endif

Copyright © 2002 by The OGRE Team