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

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    ** This file is part of the documentation of the Qt Toolkit.
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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;
    };