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diff --git a/demos/boxes/trackball.h b/demos/boxes/trackball.h
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--- a/demos/boxes/trackball.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 demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** This file may be used under the terms of the GNU Lesser General Public
-** License version 2.1 as published by the Free Software Foundation and
-** appearing in the file LICENSE.LGPL included in the packaging of this
-** file. Please review the following information to ensure the GNU Lesser
-** General Public License version 2.1 requirements will be met:
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights. These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU General
-** Public License version 3.0 as published by the Free Software Foundation
-** and appearing in the file LICENSE.GPL included in the packaging of this
-** file. Please review the following information to ensure the GNU General
-** Public License version 3.0 requirements will be met:
-** http://www.gnu.org/copyleft/gpl.html.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef TRACKBALL_H
-#define TRACKBALL_H
-
-#include <QtGui>
-
-#include <QtGui/qvector3d.h>
-#include <QtGui/qquaternion.h>
-
-class TrackBall
-{
-public:
-    enum TrackMode
-    {
-        Plane,
-        Sphere,
-    };
-    TrackBall(TrackMode mode = Sphere);
-    TrackBall(float angularVelocity, const QVector3D& axis, TrackMode mode = Sphere);
-    // coordinates in [-1,1]x[-1,1]
-    void push(const QPointF& p, const QQuaternion &transformation);
-    void move(const QPointF& p, const QQuaternion &transformation);
-    void release(const QPointF& p, const QQuaternion &transformation);
-    void start(); // starts clock
-    void stop(); // stops clock
-    QQuaternion rotation() const;
-private:
-    QQuaternion m_rotation;
-    QVector3D m_axis;
-    float m_angularVelocity;
-
-    QPointF m_lastPos;
-    QTime m_lastTime;
-    bool m_paused;
-    bool m_pressed;
-    TrackMode m_mode;
-};
-
-#endif