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diff --git a/examples/datavisualization/customproxy/variantbardatamapping.h b/examples/datavisualization/customproxy/variantbardatamapping.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 VARIANTBARDATAMAPPING_H
+#define VARIANTBARDATAMAPPING_H
+
+#include <QStringList>
+
+class VariantBarDataMapping : public QObject
+{
+    Q_OBJECT
+    //! [0]
+    Q_PROPERTY(int rowIndex READ rowIndex WRITE setRowIndex)
+    Q_PROPERTY(int columnIndex READ columnIndex WRITE setColumnIndex)
+    Q_PROPERTY(int valueIndex READ valueIndex WRITE setValueIndex)
+    Q_PROPERTY(QStringList rowCategories READ rowCategories WRITE setRowCategories)
+    Q_PROPERTY(QStringList columnCategories READ columnCategories WRITE setColumnCategories)
+    //! [0]
+public:
+    explicit VariantBarDataMapping();
+    VariantBarDataMapping(const VariantBarDataMapping &other);
+    //! [1]
+    VariantBarDataMapping(int rowIndex, int columnIndex, int valueIndex,
+                           const QStringList &rowCategories,
+                           const QStringList &columnCategories);
+    //! [1]
+    virtual ~VariantBarDataMapping();
+
+    VariantBarDataMapping &operator=(const VariantBarDataMapping &other);
+
+    void setRowIndex(int index);
+    int rowIndex() const;
+    void setColumnIndex(int index);
+    int columnIndex() const;
+    void setValueIndex(int index);
+    int valueIndex() const;
+
+    void setRowCategories(const QStringList &categories);
+    const QStringList &rowCategories() const;
+    void setColumnCategories(const QStringList &categories);
+    const QStringList &columnCategories() const;
+
+    //! [2]
+    void remap(int rowIndex, int columnIndex, int valueIndex,
+               const QStringList &rowCategories,
+               const QStringList &columnCategories);
+    //! [2]
+signals:
+    //! [3]
+    void mappingChanged();
+    //! [3]
+
+private:
+    // Indexes of the mapped items in the VariantDataItem
+    int m_rowIndex;
+    int m_columnIndex;
+    int m_valueIndex;
+
+    // For row/column items, sort items into these categories. Other categories are ignored.
+    QStringList m_rowCategories;
+    QStringList m_columnCategories;
+};
+
+#endif