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diff --git a/src/datavisualization/data/barrenderitem_p.h b/src/datavisualization/data/barrenderitem_p.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 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
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the QtDataVisualization API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef BARRENDERITEM_P_H
+#define BARRENDERITEM_P_H
+
+#include "abstractrenderitem_p.h"
+
+QT_DATAVISUALIZATION_BEGIN_NAMESPACE
+
+class Bars3DRenderer;
+
+class BarRenderItem : public AbstractRenderItem
+{
+public:
+    BarRenderItem();
+    BarRenderItem(const BarRenderItem &other);
+    virtual ~BarRenderItem();
+
+    // Position relative to data window (for bar label generation)
+    inline void setPosition(const QPoint &pos) { m_position = pos; }
+    inline const QPoint &position() const { return m_position; }
+
+    // Actual cached data value of the bar (needed to trigger label reformats)
+    inline void setValue(qreal value);
+    inline qreal value() const { return m_value; }
+
+    // Normalized bar height
+    inline void setHeight(GLfloat height) { m_height = height; }
+    inline GLfloat height() const { return m_height; }
+
+    // Label item for formatted label
+    LabelItem &sliceLabelItem();
+
+    // Formatted label for item.
+    void setSliceLabel(const QString &label);
+    QString &sliceLabel(); // Formats label if not previously formatted
+
+protected:
+    qreal m_value;
+    QPoint m_position; // x = row, y = column
+    GLfloat m_height;
+    QString m_sliceLabel;
+    LabelItem *m_sliceLabelItem;
+
+    friend class QBarDataItem;
+};
+
+void BarRenderItem::setValue(qreal value)
+{
+    m_value = value;
+     // Force reformatting on next access by setting label string to null string
+    if (!m_sliceLabel.isNull())
+        setSliceLabel(QString());
+    if (!m_selectionLabel.isNull())
+        setSelectionLabel(QString());
+}
+
+typedef QVector<BarRenderItem> BarRenderItemRow;
+typedef QVector<BarRenderItemRow> BarRenderItemArray;
+
+QT_DATAVISUALIZATION_END_NAMESPACE
+
+#endif