/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
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** modification, are permitted provided that the following conditions are
** met:
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**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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****************************************************************************/

#ifndef MAINWIDGET_H
#define MAINWIDGET_H

#include "geometryengine.h"

#include <QGLWidget>
#include <QOpenGLFunctions>
#include <QMatrix4x4>
#include <QQuaternion>
#include <QVector2D>
#include <QBasicTimer>
#include <QGLShaderProgram>
#include <QTime>
#include <QTimer>

class GeometryEngine;

class MainWidget : public QGLWidget, protected QOpenGLFunctions
{
    Q_OBJECT

public:
    explicit MainWidget(QWidget *parent = 0);
    ~MainWidget();

public slots:
    void handleRenderReq();

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

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

    void initShaders();
    void initTextures();

private:
    QBasicTimer timer;
    QGLShaderProgram program;
    GeometryEngine geometries;

    GLuint texture;

    QMatrix4x4 projection;

    QVector2D mousePressPosition;
    QVector3D rotationAxis;
    qreal angularSpeed;
    QQuaternion rotation;

    QVector<QVector3D> m_items;
    QTimer *m_timer;
    QTime m_frameTimer;
    int m_numFrames;
};

#endif // MAINWIDGET_H
