/*-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright © 2000-2004 The OGRE Team
Also see acknowledgements in Readme.html
 
This program 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 of the License, or (at your option) any later
version.

This program 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.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------*/
#ifndef __PagingLandScapePageSourceListener_H__
#define __PagingLandScapePageSourceListener_H__

#include "OgrePagingLandScapePrerequisites.h"

namespace Ogre 
{
    /** Abstract class which classes can override to receive notifications
        when a page is ready to be added to the terrain manager.
    */
    class _OgrePagingLandScapeExport PagingLandScapeListener
    {

        public:         
			PagingLandScapeListener(){};
			virtual ~PagingLandScapeListener(){};
            /** Listener method called when a new page is about to be constructed. 
            @param pagex, pagez The index of the page being constructed
            @param heightData Array of normalised height data (0..1). The size of
                this buffer will conform to the scene manager page size. The listener
                may modify the data if it wishes.
            */            
            virtual void pagePreloaded(const size_t pagex, const size_t pagez, const Real* heightData, const AxisAlignedBox &Bbox){};
            virtual void pageLoaded(const size_t pagex, const size_t pagez, const Real* heightData, const AxisAlignedBox &Bbox){};
            virtual void pageUnloaded(const size_t pagex, const size_t pagez, const Real* heightData, const AxisAlignedBox &Bbox){};
            virtual void pagePostunloaded(const size_t pagex, const size_t pagez){};
            virtual void pageShow(const size_t pagex, const size_t pagez, const Real* heightData, const AxisAlignedBox &Bbox){};
            virtual void pageHide(const size_t pagex, const size_t pagez, const Real* heightData, const AxisAlignedBox &Bbox) {};
            virtual void tileLoaded(const size_t pagex, const size_t pagez, const size_t tilex, const size_t tilez, const AxisAlignedBox &Bbox){};
            virtual void tileUnloaded(const size_t pagex, const size_t pagez, const size_t tilex, const size_t tilez, const AxisAlignedBox &Bbox){};
            virtual void tileDeformed(const size_t pagex, const size_t pagez, const size_t tilex, const size_t tilez, const AxisAlignedBox &Bbox){};
            virtual void tileShow(const size_t pagex, const size_t pagez, const size_t tilex, const size_t tilez, const AxisAlignedBox &Bbox){};
            virtual void tileHide(const size_t pagex, const size_t pagez, const size_t tilex, const size_t tilez, const AxisAlignedBox &Bbox){};
            virtual void terrainReady(void) {};

    };
}
#endif //__PagingLandScapePageSourceListener_H__

