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diff --git a/examples/datavisualization/bars/graphmodifier.h b/examples/datavisualization/bars/graphmodifier.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 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 QtDataVisualization 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 GRAPHMODIFIER_H
+#define GRAPHMODIFIER_H
+
+#include <QtDataVisualization/q3dbars.h>
+#include <QtDataVisualization/qbardataproxy.h>
+#include <QtDataVisualization/qabstract3dseries.h>
+
+#include <QFont>
+#include <QDebug>
+#include <QStringList>
+#include <QPointer>
+
+using namespace QtDataVisualization;
+
+class GraphModifier : public QObject
+{
+    Q_OBJECT
+public:
+    explicit GraphModifier(Q3DBars *bargraph);
+    ~GraphModifier();
+
+    void resetTemperatureData();
+    void changePresetCamera();
+    void changeLabelBackground();
+    void changeFont(const QFont &font);
+    void changeFontSize(int fontsize);
+    void rotateX(int rotation);
+    void rotateY(int rotation);
+    void setBackgroundEnabled(int enabled);
+    void setGridEnabled(int enabled);
+    void setSmoothBars(int smooth);
+    void setSeriesVisibility(int enabled);
+
+public slots:
+    void changeRange(int range);
+    void changeStyle(int style);
+    void changeSelectionMode(int selectionMode);
+    void changeTheme(int theme);
+    void changeShadowQuality(int quality);
+    void shadowQualityUpdatedByVisual(QAbstract3DGraph::ShadowQuality shadowQuality);
+
+signals:
+    void shadowQualityChanged(int quality);
+    void backgroundEnabledChanged(bool enabled);
+    void gridEnabledChanged(bool enabled);
+    void fontChanged(QFont font);
+    void fontSizeChanged(int size);
+
+private:
+    Q3DBars *m_graph;
+    float m_xRotation;
+    float m_yRotation;
+    int m_fontSize;
+    int m_segments;
+    int m_subSegments;
+    float m_minval;
+    float m_maxval;
+    QStringList m_months;
+    QStringList m_years;
+    QValue3DAxis *m_temperatureAxis;
+    QCategory3DAxis *m_yearAxis;
+    QCategory3DAxis *m_monthAxis;
+    QBar3DSeries *m_primarySeries;
+    QBar3DSeries *m_secondarySeries;
+    QAbstract3DSeries::Mesh m_barMesh;
+    bool m_smooth;
+};
+
+#endif