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/*  -*-c++-*-
 *  Copyright (C) 2009 Cedric Pinson <mornifle@plopbyte.net>
 *
 * 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 OSGANIMATION_STATSHANDLER_H
#define OSGANIMATION_STATSHANDLER_H

#include <osgAnimation/Timeline>
#include <osgGA/GUIEventHandler>
#include <osgViewer/ViewerBase>
#include <osgViewer/Viewer>
#include <osgText/Text>

namespace osgAnimation
{
#if 0
    struct StatAction
    {

        std::string _name;
        osg::ref_ptr<osg::Group> _group;
        osg::ref_ptr<osg::Geode> _label;
        osg::ref_ptr<osg::MatrixTransform> _graph;
        osg::ref_ptr<osgText::Text> _textLabel;

        void init(osg::Stats* stats, const std::string& name, const osg::Vec3& pos, float width, float heigh, const osg::Vec4& color);
        void setPosition(const osg::Vec3& pos);
        void setAlpha(float v);
    };

#endif

/** Event handler for adding on screen stats reporting to Viewers.*/
    class OSGANIMATION_EXPORT StatsHandler : public osgGA::GUIEventHandler
    {
    public:

        StatsHandler();

        enum StatsType
        {
            NO_STATS = 0,
            FRAME_RATE = 1,
            LAST = 2
        };

        void setKeyEventTogglesOnScreenStats(int key) { _keyEventTogglesOnScreenStats = key; }
        int getKeyEventTogglesOnScreenStats() const { return _keyEventTogglesOnScreenStats; }

        void setKeyEventPrintsOutStats(int key) { _keyEventPrintsOutStats = key; }
        int getKeyEventPrintsOutStats() const { return _keyEventPrintsOutStats; }

        double getBlockMultiplier() const { return _blockMultiplier; }

        void reset();

        osg::Camera* getCamera() { return _camera.get(); }
        const osg::Camera* getCamera() const { return _camera.get(); }

        virtual bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa);

        /** Get the keyboard and mouse usage of this manipulator.*/
        virtual void getUsage(osg::ApplicationUsage& usage) const;

    protected:

        void setUpHUDCamera(osgViewer::ViewerBase* viewer);

        osg::Geometry* createBackgroundRectangle(const osg::Vec3& pos, const float width, const float height, osg::Vec4& color);

        osg::Geometry* createGeometry(const osg::Vec3& pos, float height, const osg::Vec4& colour, unsigned int numBlocks);

        osg::Geometry* createFrameMarkers(const osg::Vec3& pos, float height, const osg::Vec4& colour, unsigned int numBlocks);

        osg::Geometry* createTick(const osg::Vec3& pos, float height, const osg::Vec4& colour, unsigned int numTicks);

        osg::Node* createCameraTimeStats(const std::string& font, osg::Vec3& pos, float startBlocks, bool acquireGPUStats, float characterSize, osg::Stats* viewerStats, osg::Camera* camera);

        void setUpScene(osgViewer::Viewer* viewer);

        int                                 _keyEventTogglesOnScreenStats;
        int                                 _keyEventPrintsOutStats;

        int                                 _statsType;

        bool                                _initialized;
        osg::ref_ptr<osg::Camera>           _camera;

        osg::ref_ptr<osg::Switch>           _switch;
        osg::ref_ptr<osg::Group>            _group;

        unsigned int                        _frameRateChildNum;
        unsigned int                        _numBlocks;
        double                              _blockMultiplier;

        float                               _statsWidth;
        float                               _statsHeight;

//        std::map<std::string, StatAction >      _actions;
    };

}
#endif