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diff --git a/examples/surfacechart/chartmodifier.h b/examples/surfacechart/chartmodifier.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the QtDataVis3D module.
+**
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+**
+****************************************************************************/
+
+#ifndef CHARTMODIFIER_H
+#define CHARTMODIFIER_H
+
+#include <QtDataVis3D/Q3DSurface>
+#include <QSlider>
+
+using namespace QtDataVis3D;
+
+class ChartModifier : public QObject
+{
+    Q_OBJECT
+public:
+    explicit ChartModifier(Q3DSurface *chart);
+    ~ChartModifier();
+
+    void toggleSmooth(bool enabled);
+    void toggleSurfaceGrid(bool enable);
+    void toggleSqrtSin(bool enable);
+    void togglePlane(bool enable);
+    void toggleGridSliderLock(bool enable);
+    void setGridSliderX(QSlider *slider) { m_gridSliderX = slider; }
+    void setGridSliderZ(QSlider *slider) { m_gridSliderZ = slider; }
+    void adjustXCount(int count);
+    void adjustZCount(int count);
+
+private:
+    Q3DSurface *m_chart;
+    QSlider *m_gridSliderX;
+    QSlider *m_gridSliderZ;
+    bool m_gridSlidersLocked;
+    int m_xCount;
+    int m_zCount;
+};
+
+#endif // CHARTMODIFIER_H