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diff --git a/src/datavisualization/engine/qabstract3dgraph_p.h b/src/datavisualization/engine/qabstract3dgraph_p.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
+**
+****************************************************************************/
+
+//
+//  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 QABSTRACT3DGRAPH_P_H
+#define QABSTRACT3DGRAPH_P_H
+
+#include "datavisualizationglobal_p.h"
+
+#include <QObject>
+
+class QOpenGLContext;
+class QOpenGLPaintDevice;
+
+QT_BEGIN_NAMESPACE_DATAVISUALIZATION
+
+class QAbstract3DGraph;
+class Abstract3DController;
+class QAbstract3DAxis;
+
+class QAbstract3DGraphPrivate : public QObject
+{
+    Q_OBJECT
+public:
+    QAbstract3DGraphPrivate(QAbstract3DGraph *q);
+    ~QAbstract3DGraphPrivate();
+
+    void setVisualController(Abstract3DController *controller);
+    void handleDevicePixelRatioChange();
+
+    void render();
+
+public slots:
+    void renderLater();
+    void renderNow();
+
+    virtual void handleAxisXChanged(QAbstract3DAxis *axis) = 0;
+    virtual void handleAxisYChanged(QAbstract3DAxis *axis) = 0;
+    virtual void handleAxisZChanged(QAbstract3DAxis *axis) = 0;
+
+public:
+    QAbstract3DGraph *q_ptr;
+
+    bool m_updatePending;
+    QOpenGLContext *m_context;
+    Abstract3DController *m_visualController;
+    float m_devicePixelRatio;
+};
+
+QT_END_NAMESPACE_DATAVISUALIZATION
+
+#endif