// Basé sur :
// CC-BY Edouard.Thiel@univ-amu.fr - 22/01/2019

#ifndef GLAREA_H
#define GLAREA_H

#include <QKeyEvent>
#include <QOpenGLWidget>
#include <QOpenGLExtraFunctions>
#include <QOpenGLBuffer>
#include <QOpenGLShaderProgram>
#include <QOpenGLTexture>
#include <QColor>


class GLArea : public QOpenGLWidget,
               protected QOpenGLExtraFunctions
{
    Q_OBJECT

public:
    explicit GLArea(QWidget *parent = nullptr);
    ~GLArea() override;

signals:
	void onInit(QOpenGLExtraFunctions *glf);
	void onPaint(QOpenGLExtraFunctions *glf,
				 const QMatrix4x4 &projection,
				 const QMatrix4x4 &view);

protected:
    void initializeGL() override;
    void doProjection();
    void resizeGL(int w, int h) override;
    void paintGL() override;
    void keyPressEvent(QKeyEvent *ev) override;
    void keyReleaseEvent(QKeyEvent *ev) override;
    void mousePressEvent(QMouseEvent *ev) override;
    void mouseReleaseEvent(QMouseEvent *ev) override;
    void mouseMoveEvent(QMouseEvent *ev) override;

private:
    float xRot=20.0f, yRot=0.0f, zRot=0.0f;
    float xPos=0.0f,  yPos=0.0f, zPos=-50.0f;
    float dt = 0;
    float windowRatio = 1.0f;
    QPoint lastPos;
};

#endif // GLAREA_H