SimpleQTViewerGLWidget.h

Go to the documentation of this file.

#ifndef GlobeEngineSimpleQTViewerGLWidget_h
#define GlobeEngineSimpleQTViewerGLWidget_h

#include "OpenGL_Includes.h"
#include "InputControl.h"

#include <QLabel>

#ifdef __APPLE__
#   include <QOpenGLTexture>
#endif

#ifdef GENGINE_QT5
    #include <QOpenGLDebugLogger>
    #include <QOpenGLWidget>
#else
    #include <QGLWidget>
#endif

namespace geQT {
#ifdef GENGINE_QT5
    class SimpleQTViewerGLWidget : public QOpenGLWidget {
#else
    class SimpleQTViewerGLWidget : public QGLWidget {
#endif
        Q_OBJECT

public:
    SimpleQTViewerGLWidget(ge::Engine* _engine, ge::InputControl* _input);
    ~SimpleQTViewerGLWidget();

    QSize minimumSizeHint() const;
    QSize sizeHint() const;
    void setParentPosition(int _x, int _y);

    static void setDefaultSurfaceFormatForConfiguration(int _numberOfSamples = 4, int _depthBufferSize = 24, int _stencilBufferSize = 8, int _alphaChannelSize = 0);
    
    //void startAnimationLoop();
    // control UI painting
    void enableUIPainting(bool _in = true);
    void disableUIPainting();
      
    // cross platform and cross qt version text drawing functions
    // should only be called within the draw UI function
    void drawText(vmml::Vector2d _pt, std::string _string, QFont _font);

    bool checkIfOpenGLContextActive();
    bool restoreEngineOpenGLContext();

public:
    // necessary overrides for new widget class
    virtual void initialize() = 0;
    virtual void drawGL() = 0;
    virtual void updateScene() = 0;
    virtual void drawUI() = 0;
    virtual void resize(int _width, int _height) = 0;

    // overrides from QT to handle input events of QTWindow
    virtual void keyPressEvent(QKeyEvent *e);
    virtual void keyReleaseEvent(QKeyEvent *e);

    // Signals comming from the engine
signals:
    void objectSelectionEvent();
        
protected:
    // overrides from QT to handle graphic events of QT
    void initializeGL();
    void paintGL();
    void resizeGL(int width, int height);

    // overrides from QT to handle input events of QTWidget
    virtual void leaveEvent(QEvent * event);
    virtual void enterEvent(QEvent * event);
    virtual void wheelEvent(QWheelEvent* event);
    virtual void mousePressEvent(QMouseEvent *event);
    virtual void mouseReleaseEvent(QMouseEvent *event);
    virtual void mouseDoubleClickEvent(QMouseEvent * event);
    virtual void mouseMoveEvent(QMouseEvent *event);
        
    // additional method for QPainter UI painting. This method will call drawUI.
    void paintUI();
  
protected:
    bool mouseInWidget;
    int posParentX;
    int posParentY;

    // Defines for QPainter drawing on OSX
#ifdef __APPLE__
    QImage* image;
    QOpenGLTexture* texture;
    //QOpenGLTexture texture;
    QSize* paintArea;
#endif
    QPainter* p;
    QTimer* updateTimer;
        
    // Input control 
    ge::InputControl* inputcontrol;
    ge::Engine* engine;
        
    bool paintUIEnabled;

    // GLContext Information
#if defined(_WIN32) || defined(WIN32)
    HGLRC contextID;
    HDC hdcID;
#endif

    };
}
#endif