/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 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 OSGPRODUCER_VIEWEREVENTHANDLER
#define OSGPRODUCER_VIEWEREVENTHANDLER 1

#include <osgGA/GUIEventHandler>
#include <osgProducer/Viewer>

namespace osgProducer {

class OSGPRODUCER_EXPORT ViewerEventHandler : public osgGA::GUIEventHandler
{
    public:
    
        ViewerEventHandler(OsgCameraGroup* cg);
    
        virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa);

        virtual void accept(osgGA::GUIEventHandlerVisitor& gehv);

        /** Get the keyboard and mouse usage of this manipulator.*/
        virtual void getUsage(osg::ApplicationUsage& usage) const;
        
        OsgCameraGroup* getOsgCameraGroup() { return _cg; }
        const OsgCameraGroup* getOsgCameraGroup() const { return _cg; }
        
        
        void setWriteNodeFileName(const std::string& filename) { _writeNodeFileName = filename; }
        const std::string& getWriteNodeFileName() const { return _writeNodeFileName; }
        
        
        void setDisplayHelp(bool displayHelp) { _displayHelp = displayHelp; }
        
        bool getDisplayHelp() const { return _displayHelp; }
        
        
        enum FrameStatsMode
        {
            NO_STATS = 0,
            FRAME_RATE = 1,
            CAMERA_STATS = 2,
            SCENE_STATS = 3
        };
        
        void setFrameStatsMode(FrameStatsMode mode);
        FrameStatsMode getFrameStatsMode() { return _frameStatsMode; }

        void setWriteImageOnNextFrame(bool writeImageOnNextFrame);

        void setWriteImageFileName(const std::string& filename);
        const std::string& getWriteImageFileName() const { return _writeImageFileName; }

    protected:
        
        osgProducer::OsgCameraGroup* _cg;
        
        std::string         _writeNodeFileName;
        
        bool                _displayHelp;
        FrameStatsMode      _frameStatsMode;
        
        bool                _firstTimeTogglingFullScreen;
        
        class CameraBarrierCallback;
        CameraBarrierCallback* _cameraBarrierCallback;

        class StatsAndHelpDrawCallback;
        StatsAndHelpDrawCallback* _statsAndHelpDrawCallback;

        class SnapImageDrawCallback;
        typedef std::vector<SnapImageDrawCallback*> SnapImageDrawCallbackList;
        SnapImageDrawCallbackList   _snapImageDrawCallbackList;
        std::string                 _writeImageFileName;
};

}

#endif