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** This file is part of the test suite of the Qt Toolkit.
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#ifndef MAINWIDGET_H
#define MAINWIDGET_H

#include "geometryengine.h"

#include <QOpenGLWidget>
#include <QOpenGLFunctions>
#include <QMatrix4x4>
#include <QQuaternion>
#include <QVector2D>
#include <QBasicTimer>
#include <QOpenGLShaderProgram>
#include <QOpenGLTexture>

class GeometryEngine;

class MainWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
    Q_OBJECT

public:
    using QOpenGLWidget::QOpenGLWidget;
    ~MainWidget();

protected:
    void mousePressEvent(QMouseEvent *e) override;
    void mouseReleaseEvent(QMouseEvent *e) override;
    void timerEvent(QTimerEvent *e) override;

    void initializeGL() override;
    void resizeGL(int w, int h) override;
    void paintGL() override;

    void initShaders();
    void initTextures();

private slots:
    void cleanup();

private:
    QBasicTimer timer;
    QOpenGLShaderProgram *program = nullptr;
    GeometryEngine *geometries = nullptr;
    QOpenGLTexture *texture = nullptr;

    QMatrix4x4 projection;

    QVector2D mousePressPosition;
    QVector3D rotationAxis;
    qreal angularSpeed = 0;
    QQuaternion rotation;
};

#endif // MAINWIDGET_H