/* -*-c++-*- OpenSceneGraph - Copyright (C) 2009 Wang Rui
 *
 * 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_GRAPHICSWINDOWQT
#define OSGVIEWER_GRAPHICSWINDOWQT

#include <QtGui/QWidget>
#include <QtGui/QInputEvent>
#include <QtOpenGL/QGLWidget>
#include <osgViewer/GraphicsWindow>

class GraphWidget : public QGLWidget
{
public:
    GraphWidget( const QGLFormat& format, QWidget* parent=0, const QGLWidget* shareWidget=0, Qt::WindowFlags f=0 );
    
    inline void setGraphicsWindow( osgViewer::GraphicsWindow* gw ) { _gw = gw; }
    
    void setKeyboardModifiers( QInputEvent* event );
    
    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 mouseDoubleClickEvent( QMouseEvent* event );
    virtual void mouseMoveEvent( QMouseEvent* event );
    virtual void wheelEvent( QWheelEvent* event );
    
protected:
    osgViewer::GraphicsWindow* _gw;
};

class GraphicsWindowQt : public osgViewer::GraphicsWindow
{
public:
    GraphicsWindowQt( osg::GraphicsContext::Traits* traits );
    virtual ~GraphicsWindowQt();
    
    inline GraphWidget* getGraphWidget() { return _widget; }
    inline const GraphWidget* getGraphWidget() const { return _widget; }
    
    struct WindowData : public osg::Referenced
    {
        WindowData( GraphWidget* widget ): _widget(widget) {}
        GraphWidget* _widget;
    };
    
    bool init();
    
    virtual bool setWindowRectangleImplementation( int x, int y, int width, int height );
    virtual void getWindowRectangle( int& x, int& y, int& width, int& height );
    virtual bool setWindowDecorationImplementation( bool windowDecoration );
    virtual bool getWindowDecoration() const;
    virtual void grabFocus();
    virtual void grabFocusIfPointerInWindow();
    virtual void raiseWindow();
    virtual void setWindowName( const std::string& name );
    virtual std::string getWindowName();
    virtual void useCursor( bool cursorOn );
    virtual void setCursor( MouseCursor cursor );
    
    virtual bool valid() const;
    virtual bool realizeImplementation();
    virtual bool isRealizedImplementation() const;
    virtual void closeImplementation();
    virtual bool makeCurrentImplementation();
    virtual bool releaseContextImplementation();
    virtual void swapBuffersImplementation();
    
    virtual void requestWarpPointer( float x, float y );
    
protected:
    GraphWidget* _widget;
    QCursor _currentCursor;
    bool _initialized;
    bool _realized;
};

#endif