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

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        **
        ** This file is part of the example classes of the Qt Toolkit.
        **
        ** Licensees holding valid Qt Preview licenses may use this file in
        ** accordance with the Qt Preview License Agreement provided with the
        ** Software.
        **
        ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
        ** information about Qt Commercial License Agreements.
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        ** Contact info@trolltech.com if any conditions of this licensing are
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        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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        #include <QtOpenGL>

        class GLWidget : public QGLWidget
        {
        public:
            GLWidget(QWidget *parent);

        protected:
            void initializeGL();
            void resizeGL(int w, int h);
            void paintGL();
            void timerEvent(QTimerEvent *);

            void makeObject();
            void quad(GLenum primitive, GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2,
                      GLdouble x3, GLdouble y3, GLdouble x4, GLdouble y4);

        private:
            GLuint list;
        };