/* -*-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_VIEW
#define OSGVIEWER_VIEW 1

#include <osg/View>
#include <osgGA/MatrixManipulator>
#include <osgViewer/Scene>

#include <osgUtil/SceneView>

namespace osgViewer {

/** View holds a single view on a scene, this view may be composed of one or more slave cameras.*/
class OSGVIEWER_EXPORT View : public osg::View, public osgGA::GUIActionAdapter
{
    public:

        View();

        void setSceneData(osg::Node* node);
        osg::Node* getSceneData() { return _scene.valid() ? _scene->getSceneData() : 0; }
        const osg::Node* getSceneData() const { return _scene.valid() ? _scene->getSceneData() : 0; }

        void setEventQueue(osgGA::EventQueue* eventQueue) { _eventQueue = eventQueue; }
        osgGA::EventQueue* getEventQueue() { return _eventQueue.get(); }
        const osgGA::EventQueue* getEventQueue() const { return _eventQueue.get(); }

        void setCameraManipulator(osgGA::MatrixManipulator* manipulator);
        osgGA::MatrixManipulator* getCameraManipulator() { return _cameraManipulator.get(); }
        const osgGA::MatrixManipulator* getCameraManipulator() const { return _cameraManipulator.get(); }

        typedef std::list< osg::ref_ptr<osgGA::GUIEventHandler> > EventHandlers;
        
        void addEventHandler(osgGA::GUIEventHandler* eventHandler);
        EventHandlers& getEventHandlers() { return _eventHandlers; }
        const EventHandlers& getEventHandlers() const { return _eventHandlers; }
        
        /** Convinience method for creating slave Cameras and associated GraphicsWindows across all screens.*/
        void setUpViewAcrossAllScreens();

        /** Convinience method for a single Camara associated with a single full screen GraphicsWindow.*/
        void setUpViewOnSingleScreen(unsigned int screenNum=0);
        
        virtual void requestRedraw();
        virtual void requestContinuousUpdate(bool needed=true);
        virtual void requestWarpPointer(float x,float y);

    public:
        
        void assignSceneDataToCameras();

    protected:
    
        virtual ~View();

        osg::ref_ptr<osgViewer::Scene>          _scene;
        osg::ref_ptr<osgGA::EventQueue>         _eventQueue;
        osg::ref_ptr<osgGA::MatrixManipulator>  _cameraManipulator;
        EventHandlers                           _eventHandlers;
    
        typedef std::map<osg::ref_ptr<osg::Camera>, osg::ref_ptr<osgUtil::SceneView> > CameraSceneViewMap;
        CameraSceneViewMap _cameraSceneViewMap;

};

}

#endif