glwidget.h Example File
^{opengl/hellogl/glwidget.h}

 /****************************************************************************
 **
 ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the documentation 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 <QGLWidget>

 class GLWidget : public QGLWidget
 {
     Q_OBJECT

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

     QSize minimumSizeHint() const;
     QSize sizeHint() const;

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

 signals:
     void xRotationChanged(int angle);
     void yRotationChanged(int angle);
     void zRotationChanged(int angle);

 protected:
     void initializeGL();
     void paintGL();
     void resizeGL(int width, int height);
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);

 private:
     GLuint makeObject();
     void quad(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2,
               GLdouble x3, GLdouble y3, GLdouble x4, GLdouble y4);
     void extrude(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2);
     void normalizeAngle(int *angle);

     GLuint object;
     int xRot;
     int yRot;
     int zRot;
     QPoint lastPos;
     QColor trolltechGreen;
     QColor trolltechPurple;
 };

 #endif