GLWidget.h

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#ifndef GLWIDGET_H
#define GLWIDGET_H

#include "glew.h"
#include <QtCore\qtimer.h>
#include <QtCore\qelapsedtimer.h>
#include <QtGui\qmatrix4x4.h>
#include <QtGui\QMouseEvent>
#include <QtGui\QWheelEvent>
#include <QtGui\QKeyEvent>
#include <QtWidgets\qopenglwidget.h>

#include "..\RENDER\GLShader.h"
#include "..\RENDER\GLCamera.h"
#include "RENDER\VolumeRenderer.h"

class GLWidget : public QOpenGLWidget
{
    Q_OBJECT

public:
    GLWidget(QWidget *parent);
    ~GLWidget();

    // AUTO-CALL, FOR SETTINGS AND CONFIGS
    void initializeGL();

    // RENDERER
    void paintGL();

    // RE-ASSIGNS VIEWPORT AND PROJECTION
    void resizeGL(int width, int height);   


private:

#define REFRESH 0x52 //r
#define ZOOM 0x5a //z
#define BLUR 0x42 //b
#define FOCUS 0x46 //f

    void setSignalsAndSlots();

    void setOpenGL();

    // MAINLY OBJECT ROTATION
    void mouseMoveEvent(QMouseEvent* event);
    void mousePressEvent(QMouseEvent* event);

    // CHANGES THE ACTUAL ZOOM/BLUR/FOCUS VALUE
    void wheelEvent(QWheelEvent* event);

    // FULLSCREEN -- NOT WORKING 
    void mouseDoubleClickEvent(QMouseEvent* event);

    // KEY INPUT FOR ZOOM/BLUR/FOCUS/REFRESH
    void keyPressEvent(QKeyEvent* event);

    VolumeRenderer* volumeRenderer = nullptr;

    QTimer* timer = nullptr;
    
    GLCamera* camera = nullptr;

    bool fullscreen;

    bool volumeLoaded;

    int keyPressed;

    GLint width;

    GLint height;

    QPoint position;
    
    QMatrix4x4 modelMatrix;

    private slots:

    void updateGL();

    void cleanup();
};

#endif // GLWIDGET_H