glwidget.h Example File
opengl/textures/glwidget.h
    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 Trolltech AS. All rights reserved.
    **
    ** 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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    #ifndef GLWIDGET_H
    #define GLWIDGET_H
    #include <QGLWidget>
    class GLWidget : public QGLWidget
    {
        Q_OBJECT
    public:
        GLWidget(QWidget *parent = 0, QGLWidget *shareWidget = 0);
        ~GLWidget();
        QSize minimumSizeHint() const;
        QSize sizeHint() const;
        void rotateBy(int xAngle, int yAngle, int zAngle);
        void setClearColor(const QColor &color);
    signals:
        void clicked();
    protected:
        void initializeGL();
        void paintGL();
        void resizeGL(int width, int height);
        void mousePressEvent(QMouseEvent *event);
        void mouseMoveEvent(QMouseEvent *event);
        void mouseReleaseEvent(QMouseEvent *event);
    private:
        GLuint makeObject();
        QColor clearColor;
        QPoint lastPos;
        int xRot;
        int yRot;
        int zRot;
        static GLuint sharedObject;
        static int refCount;
    };
    #endif