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glwidget.h Example File
opengl/hellogl_es/glwidget.h

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 #ifndef GLWIDGET_H
 #define GLWIDGET_H

 #include <QGLWidget>
 #include <QTime>

 #include "cl_helper.h"

 class Bubble;
 class GLWidget : public QGLWidget {

     Q_OBJECT
 public:
     GLWidget(QWidget *parent = 0);
     ~GLWidget();
 public slots:
     void setScaling(int scale);
     void setLogo();
     void setTexture();
     void showBubbles(bool);
 protected:
     void paintGL ();
     void initializeGL ();
 private:
     GLuint  m_uiTexture;
     qreal   m_fAngle;
     qreal   m_fScale;
     bool m_showBubbles;
     void paintTexturedCube();
     void paintQtLogo();
     void createGeometry();
     void createBubbles(int number);
     void quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4);
     void extrude(qreal x1, qreal y1, qreal x2, qreal y2);
     QList<qreal> vertices;
     QList<qreal> normals;
     q_vertexType *createdVertices;
     q_vertexType *createdNormals;
     int m_vertexNumber;
     bool qtLogo;
     QList<Bubble*> bubbles;
     int frames;
     QTime time;
 };
 #endif