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diff --git a/examples/charts/polarchart/chartview.h b/examples/charts/polarchart/chartview.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 Qt Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** 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
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CHARTVIEW_H
+#define CHARTVIEW_H
+
+#include <QChartView>
+#include <QPolarChart>
+
+QT_CHARTS_USE_NAMESPACE
+
+class ChartView : public QChartView
+{
+public:
+    ChartView(QWidget *parent = 0);
+
+protected:
+    void keyPressEvent(QKeyEvent *event);
+
+private:
+    void switchChartType();
+};
+
+#endif