/* OpenSceneGraph example, osganimate.
*
*  Permission is hereby granted, free of charge, to any person obtaining a copy
*  of this software and associated documentation files (the "Software"), to deal
*  in the Software without restriction, including without limitation the rights
*  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
*  copies of the Software, and to permit persons to whom the Software is
*  furnished to do so, subject to the following conditions:
*
*  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
*  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
*  THE SOFTWARE.
*/


    #include <QtCore/QString>
    #include <QtCore/QTimer>
    #include <QtGui/QKeyEvent>
    #include <QtGui/QApplication>
    #include <QtOpenGL/QGLWidget>
    #include <QtGui/QMainWindow>

    using Qt::WindowFlags;


#include <osgViewer/Viewer>
#include <osgViewer/CompositeViewer>
#include <osgViewer/ViewerEventHandlers>
#include <osgViewer/GraphicsWindow>

#include <osgViewer/ViewerEventHandlers>

#if defined(WIN32) && !defined(__CYGWIN__)
#include <osgViewer/api/Win32/GraphicsWindowWin32>
typedef HWND WindowHandle;
typedef osgViewer::GraphicsWindowWin32::WindowData WindowData;
#elif defined(__APPLE__) && defined(APPLE_PRE_10_3)
#include <osgViewer/api/Carbon/GraphicsWindowCarbon>
typedef WindowRef WindowHandle;
typedef osgViewer::GraphicsWindowCarbon::WindowData WindowData;
#else // all other unix
#include <osgViewer/api/X11/GraphicsWindowX11>
typedef Window WindowHandle;
typedef osgViewer::GraphicsWindowX11::WindowData WindowData;
#endif


#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchMatrixManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TerrainManipulator>

#include <osgDB/ReadFile>

#include <iostream>


class QOSGWidget : public QWidget
{
    public:

        QOSGWidget( QWidget * parent = 0, const char * name = 0, WindowFlags f = 0 );

        virtual ~QOSGWidget() {}

        osgViewer::GraphicsWindow* getGraphicsWindow() { return _gw.get(); }
        const osgViewer::GraphicsWindow* getGraphicsWindow() const { return _gw.get(); }

    protected:

        void init();
        void createContext();

        virtual void mouseDoubleClickEvent ( QMouseEvent * event );
        virtual void closeEvent( QCloseEvent * event );
        virtual void destroyEvent( bool destroyWindow = true, bool destroySubWindows = true);
        virtual void resizeEvent( QResizeEvent * event );
        virtual void keyPressEvent( QKeyEvent* event );
        virtual void keyReleaseEvent( QKeyEvent* event );
        virtual void mousePressEvent( QMouseEvent* event );
        virtual void mouseReleaseEvent( QMouseEvent* event );
        virtual void mouseMoveEvent( QMouseEvent* event );

        osg::ref_ptr<osgViewer::GraphicsWindow> _gw;
};

class ViewerQOSG :  public QOSGWidget,public osgViewer::Viewer
{
	//include this if you want to emit signals, but it will have to go through the moc
	//Q_OBJECT 

    public:
		

        ViewerQOSG(QWidget * parent = 0, const char * name = 0, WindowFlags f = 0):
            QOSGWidget( parent, name, f )
        {
            getCamera()->setViewport(new osg::Viewport(0,0,width(),height()));

			// This line causes the image to be stretched vertically on Nvidia on XP!
            getCamera()->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(width())/static_cast<double>(height()), 1.0f, 10000.0f);
            getCamera()->setGraphicsContext(getGraphicsWindow());

            setThreadingModel(osgViewer::Viewer::SingleThreaded);

        connect(&_timer, SIGNAL(timeout()), this, SLOT(update()));
            _timer.start(10);
    }

        virtual void paintEvent( QPaintEvent * event ) { frame(); }

    protected:

        QTimer _timer;
};



class CompositeViewerQOSG : public osgViewer::CompositeViewer, public QOSGWidget
{
    public:

        CompositeViewerQOSG(QWidget * parent = 0, const char * name = 0, WindowFlags f = 0):
            QOSGWidget( parent, name, f )
        {
            setThreadingModel(osgViewer::CompositeViewer::SingleThreaded);

            connect(&_timer, SIGNAL(timeout()), this, SLOT(repaint()));
            _timer.start(1);
        }

        virtual void paintEvent( QPaintEvent * event ) { frame(); }

    protected:

        QTimer _timer;
};



int mainQOSGWidget(QApplication& app, osg::ArgumentParser& arguments);
void setupManipulatorAndHandler(osgViewer::View & viewer, osg::ArgumentParser & arguments);