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# glwidget.h Example File
opengl/pbuffers/glwidget.h

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        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
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        ** This file is part of the documentation of the Qt Toolkit.
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        ** License version 2.0 as published by the Free Software Foundation
        ** and appearing in the file LICENSE.GPL included in the packaging of
        ** this file.  Please review the following information to ensure GNU
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        #include <QtOpenGL>

        class GLWidget : public QGLWidget
        {
        public:
            GLWidget(QWidget *parent);
            ~GLWidget();
            void initializeGL();
            void resizeGL(int w, int h);
            void paintGL();
            void timerEvent(QTimerEvent *) { update(); }
            void mousePressEvent(QMouseEvent *) { killTimer(timerId); }
            void mouseReleaseEvent(QMouseEvent *) { timerId = startTimer(20); }

            void drawCube(int i, GLfloat z, GLfloat ri, GLfloat jmp, GLfloat amp);
            void initCommon();
            void initPbuffer();

        private:
            GLfloat rot[3], xOffs[3], yOffs[3], xInc[3];
            GLuint pbufferList;
            GLuint dynamicTexture;
            GLuint cubeTexture;
            int timerId;

            QGLPixelBuffer *pbuffer;
        };