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diff --git a/src/datavis3d/data/qitemmodelbardatamapping.h b/src/datavis3d/data/qitemmodelbardatamapping.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 QITEMMODELBARDATAMAPPING_H
+#define QITEMMODELBARDATAMAPPING_H
+
+#include <QtDataVis3D/qdatavis3denums.h>
+#include <QStringList>
+
+QT_DATAVIS3D_BEGIN_NAMESPACE
+
+class QItemModelBarDataMappingPrivate;
+
+class QT_DATAVIS3D_EXPORT QItemModelBarDataMapping : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString rowRole READ rowRole WRITE setRowRole)
+    Q_PROPERTY(QString columnRole READ columnRole WRITE setColumnRole)
+    Q_PROPERTY(QString valueRole READ valueRole WRITE setValueRole)
+    Q_PROPERTY(QStringList rowCategories READ rowCategories WRITE setRowCategories)
+    Q_PROPERTY(QStringList columnCategories READ columnCategories WRITE setColumnCategories)
+public:
+    explicit QItemModelBarDataMapping();
+    QItemModelBarDataMapping(const QItemModelBarDataMapping &other);
+    QItemModelBarDataMapping(const QString &valueRole);
+    QItemModelBarDataMapping(const QString &rowRole, const QString &columnRole,
+                             const QString &valueRole, const QStringList &rowCategories,
+                             const QStringList &columnCategories);
+    virtual ~QItemModelBarDataMapping();
+
+    QItemModelBarDataMapping &operator=(const QItemModelBarDataMapping &other);
+
+    // If row categories or column categories is an empty list, use item models's rows and columns for rows and columns.
+    // If the categories are both defined, ignore item model's rows and columns and figure out the rows and columns from
+    // the values of the set roles for each item.
+
+    void setRowRole(const QString &role);
+    QString rowRole() const;
+    void setColumnRole(const QString &role);
+    QString columnRole() const;
+    void setValueRole(const QString &role);
+    QString valueRole() const;
+
+    void setRowCategories(const QStringList &categories);
+    const QStringList &rowCategories() const;
+    void setColumnCategories(const QStringList &categories);
+    const QStringList &columnCategories() const;
+
+    void remap(const QString &rowRole, const QString &columnRole,
+               const QString &valueRole, const QStringList &rowCategories,
+               const QStringList &columnCategories);
+signals:
+    void mappingChanged();
+
+private:
+    QScopedPointer<QItemModelBarDataMappingPrivate> d_ptr;
+};
+
+
+QT_DATAVIS3D_END_NAMESPACE
+
+#endif