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diff --git a/src/engine/qdataset_p.h b/src/engine/qdataset_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtDataVis3D module.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt 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 QDATASET_P_H
+#define QDATASET_P_H
+
+#include "qdatavis3dglobal.h"
+#include "qdataset.h"
+#include "drawer_p.h"
+#include "labelitem_p.h"
+#include <QVector>
+#include <QString>
+
+QTCOMMERCIALDATAVIS3D_BEGIN_NAMESPACE
+
+class QDataSetPrivate : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit QDataSetPrivate(QDataSet *q);
+    ~QDataSetPrivate();
+
+    void setDrawer(Drawer *drawer);
+    QVector<QDataRow*> set();
+    QDataRow *getRow(int rowIndex);
+    QVector<QString> rowLabels();
+    QVector<QString> columnLabels();
+    QVector<LabelItem> rowLabelItems();
+    QVector<LabelItem> columnLabelItems();
+    void axisLabels(QString *xAxis, QString *zAxis, QString *yAxis);
+    void axisLabelItems(LabelItem *xAxisItem, LabelItem *zAxisItem, LabelItem *yAxisItem);
+    void verifySize(int colSize, int rowSize = 0); // If rowSize is 0, don't verify rows
+    // first = min, second = max
+    QPair<GLfloat, GLfloat> limitValues();
+
+public Q_SLOTS:
+    void updateTextures();
+
+private:
+    QDataSet *q_ptr;
+    QVector<QDataRow*> m_set;
+    QString m_xAxis;
+    QString m_zAxis;
+    QString m_yAxis;
+    QVector<QString> m_labelsRow;
+    QVector<QString> m_labelsColumn;
+    LabelItem m_xAxisItem;
+    LabelItem m_zAxisItem;
+    LabelItem m_yAxisItem;
+    QVector<LabelItem> m_labelItemsRow;
+    QVector<LabelItem> m_labelItemsColumn;
+    Drawer *m_drawer;
+    friend class QDataSet;
+};
+
+QTCOMMERCIALDATAVIS3D_END_NAMESPACE
+
+#endif