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diff --git a/src/datavis3d/data/qabstractdataproxy.h b/src/datavis3d/data/qabstractdataproxy.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 QABSTRACTDATAPROXY_H
+#define QABSTRACTDATAPROXY_H
+
+#include <QtDataVis3D/qdatavis3denums.h>
+#include <QObject>
+#include <QScopedPointer>
+
+QT_DATAVIS3D_BEGIN_NAMESPACE
+
+class QAbstractDataProxyPrivate;
+
+class QT_DATAVIS3D_EXPORT QAbstractDataProxy : public QObject
+{
+    Q_OBJECT
+    Q_ENUMS(DataType)
+    Q_PROPERTY(DataType type READ type)
+
+public:
+    enum DataType {
+        DataTypeNone = 0,
+        DataTypeBar = 1,
+        DataTypeMap = 2,
+        DataTypeScatter = 4,
+        DataTypeSurface = 8
+    };
+
+protected:
+    explicit QAbstractDataProxy(QAbstractDataProxyPrivate *d);
+public:
+    virtual ~QAbstractDataProxy();
+
+    DataType type() const;
+
+    // Items use this string to format single item labels, unless custom proxy initializes
+    // item labels with something else.
+    void setItemLabelFormat(const QString &format);
+    QString itemLabelFormat() const;
+
+signals:
+    void itemLabelFormatChanged();
+
+protected:
+    QScopedPointer<QAbstractDataProxyPrivate> d_ptr;
+
+private:
+    Q_DISABLE_COPY(QAbstractDataProxy)
+};
+
+QT_DATAVIS3D_END_NAMESPACE
+
+#endif // QABSTRACTDATAPROXY_H