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

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    **
    ** Copyright (C) 2005-2005 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