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

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        ** This file is part of the documentation of the Qt Toolkit.
        **
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    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
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        #ifndef GLWIDGET_H
        #define GLWIDGET_H

        #include <QGLWidget>

        class GLWidget : public QGLWidget
        {
            Q_OBJECT

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

            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 slots:
            void advanceGears();

        private:
            GLuint makeGear(const GLfloat *reflectance, GLdouble innerRadius,
                            GLdouble outerRadius, GLdouble thickness,
                            GLdouble toothSize, GLint toothCount);
            void drawGear(GLuint gear, GLdouble dx, GLdouble dy, GLdouble dz,
                          GLdouble angle);
            void normalizeAngle(int *angle);

            GLuint gear1;
            GLuint gear2;
            GLuint gear3;
            int xRot;
            int yRot;
            int zRot;
            int gear1Rot;

            QPoint lastPos;
        };

        #endif