/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * 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
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGVIEWER_SCENE
#define OSGVIEWER_SCENE 1

#include <osgGA/GUIEventHandler>
#include <osgGA/EventVisitor>
#include <osgDB/DatabasePager>
#include <osgDB/ImagePager>

#include <osgViewer/Export>

#include <list>

namespace osgViewer{

/** Scene holds the higher level reference to a single scene graph.*/
class OSGVIEWER_EXPORT Scene : public osg::Referenced
{
    public:

        virtual const char* className() const { return "Scene"; }

        void setSceneData(osg::Node* node);
        osg::Node* getSceneData();
        const osg::Node* getSceneData() const;


        void setDatabasePager(osgDB::DatabasePager* dp);
        osgDB::DatabasePager* getDatabasePager() { return _databasePager.get(); }
        const osgDB::DatabasePager* getDatabasePager() const { return _databasePager.get(); }

        void setImagePager(osgDB::ImagePager* ip);
        osgDB::ImagePager* getImagePager() { return _imagePager.get(); }
        const osgDB::ImagePager* getImagePager() const { return _imagePager.get(); }

        virtual bool requiresUpdateSceneGraph() const;

        virtual void updateSceneGraph(osg::NodeVisitor& updateVisitor);

        virtual bool requiresRedraw() const;

        /** Get the Scene object that has the specified node assigned to it.
          * return 0 if no Scene has yet been assigned the specified node.*/
        static Scene* getScene(osg::Node* node);

    protected:

        Scene();
        virtual ~Scene();

        /** Get the Scene object that has the specified node assigned to it.
          * or return a new Scene if no Scene has yet been assigned the specified node.*/
        static Scene* getOrCreateScene(osg::Node* node);

        friend class View;

        osg::ref_ptr<osg::Node>             _sceneData;

        osg::ref_ptr<osgDB::DatabasePager>  _databasePager;
        osg::ref_ptr<osgDB::ImagePager>     _imagePager;
};


}

#endif
