/*-----------------------------------------------------------------------------
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__

namespace Ogre
{
	/** Abstract class which classes can override to receive notifications
	 * when a page is ready to be added to the terrain manager.
	 *
	 * \todo mafm: not really used by anyone
	 */
	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(size_t pagex, size_t pagez, const Real* heightData, const AxisAlignedBox& Bbox) {}
		virtual void pageLoaded(size_t pagex, size_t pagez, const Real* heightData, const AxisAlignedBox& Bbox) {}
		virtual void pageUnloaded(size_t pagex, size_t pagez, const Real* heightData, const AxisAlignedBox& Bbox) {}
		virtual void pagePostunloaded(size_t pagex, size_t pagez) {}
		virtual void pageShow(size_t pagex, size_t pagez, const Real* heightData, const AxisAlignedBox& Bbox) {}
		virtual void pageHide(size_t pagex, size_t pagez, const Real* heightData, const AxisAlignedBox& Bbox) {}
		virtual void tileLoaded(size_t pagex, size_t pagez, size_t tilex, size_t tilez, const AxisAlignedBox& Bbox) {}
		virtual void tileUnloaded(size_t pagex, size_t pagez, size_t tilex, size_t tilez, const AxisAlignedBox& Bbox) {}
		virtual void tileDeformed(size_t pagex, size_t pagez, size_t tilex, size_t tilez, const AxisAlignedBox& Bbox) {}
		virtual void tileShow(size_t pagex, size_t pagez, size_t tilex, size_t tilez, const AxisAlignedBox& Bbox) {}
		virtual void tileHide(size_t pagex, size_t pagez, size_t tilex, size_t tilez, const AxisAlignedBox& Bbox) {}
		virtual void terrainReady() {}

	};
}

#endif //__PagingLandScapePageSourceListener_H__
