/****************************************************************************
**
** Copyright (C) 2006-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.2, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
** you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** In addition, as a special exception, Trolltech, as the sole
** copyright holder for Qt Designer, grants users of the Qt/Eclipse
** Integration plug-in the right for the Qt/Eclipse Integration to
** link to functionality provided by Qt Designer and its related
** libraries.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
** granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QBrush>
#include <QFont>
#include <QImage>
#include <QPen>
#include <QGLWidget>
#include <QTimer>

class Bubble;
class QPaintEvent;
class QWidget;

class GLWidget : public QGLWidget
{
    Q_OBJECT

public:
    GLWidget(QWidget *parent = 0);
    ~GLWidget();

    QSize sizeHint() const;
    int xRotation() const { return xRot; }
    int yRotation() const { return yRot; }
    int zRotation() const { return zRot; }

public slots:
    void setXRotation(int angle);
    void setYRotation(int angle);
    void setZRotation(int angle);

protected:
    void initializeGL();
    void paintEvent(QPaintEvent *event);
    void resizeGL(int width, int height);
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void showEvent(QShowEvent *event);

private slots:
    void animate();

private:
    GLuint makeObject();
    void createBubbles(int number);
    void drawInstructions(QPainter *painter);
    void extrude(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2);
    void normalizeAngle(int *angle);
    void quad(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2,
              GLdouble x3, GLdouble y3, GLdouble x4, GLdouble y4);
    void setupViewport(int width, int height);

    GLuint object;
    int xRot;
    int yRot;
    int zRot;
    QPoint lastPos;
    QColor trolltechGreen;
    QColor trolltechPurple;
    QList<Bubble*> bubbles;
    QTimer animationTimer;
};

#endif
