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diff --git a/examples/opengl/cube/mainwidget.h b/examples/opengl/cube/mainwidget.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWIDGET_H
+#define MAINWIDGET_H
+
+#include <QtOpenGL/QGLWidget>
+
+#include <QMatrix4x4>
+#include <QQuaternion>
+#include <QVector2D>
+
+class QBasicTimer;
+class QGLShaderProgram;
+
+class GeometryEngine;
+
+class MainWidget : public QGLWidget
+{
+    Q_OBJECT
+public:
+    explicit MainWidget(QWidget *parent = 0);
+    virtual ~MainWidget();
+
+signals:
+
+public slots:
+
+protected:
+    void mousePressEvent(QMouseEvent *e);
+    void mouseReleaseEvent(QMouseEvent *e);
+    void timerEvent(QTimerEvent *e);
+
+    void initializeGL();
+    void resizeGL(int w, int h);
+    void paintGL();
+
+    void initShaders();
+    void initTextures();
+
+private:
+    QBasicTimer *timer;
+    QGLShaderProgram *program;
+    GeometryEngine *geometries;
+
+    GLuint texture;
+
+    QMatrix4x4 projection;
+
+    QVector2D mousePressPosition;
+    QVector3D rotationAxis;
+    qreal angularSpeed;
+    QQuaternion rotation;
+};
+
+#endif // MAINWIDGET_H