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

        /****************************************************************************
        **
        ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
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    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
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        #ifndef GLWIDGET_H
        #define GLWIDGET_H

        #include <QGLWidget>

        class GLWidget : public QGLWidget
        {
            Q_OBJECT

        public:
            GLWidget(QWidget *parent = 0);
            ~GLWidget();

            QSize minimumSizeHint() const;
            QSize sizeHint() const;
            int xRotation() const { return xRot; }
            int yRotation() const { return yRot; }
            int zRotation() const { return zRot; }

        public slots:
            void setXRotation(int angle);
            void setYRotation(int angle);
            void setZRotation(int angle);

        signals:
            void xRotationChanged(int angle);
            void yRotationChanged(int angle);
            void zRotationChanged(int angle);

        protected:
            void initializeGL();
            void paintGL();
            void resizeGL(int width, int height);
            void mousePressEvent(QMouseEvent *event);
            void mouseMoveEvent(QMouseEvent *event);

        private:
            GLuint makeObject();
            void quad(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2,
                      GLdouble x3, GLdouble y3, GLdouble x4, GLdouble y4);
            void extrude(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2);
            void normalizeAngle(int *angle);

            GLuint object;
            int xRot;
            int yRot;
            int zRot;
            QPoint lastPos;
            QColor trolltechGreen;
            QColor trolltechPurple;
        };

        #endif