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diff --git a/src/datavis3d/engine/bars3drenderer_p.h b/src/datavis3d/engine/bars3drenderer_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 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
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the QtDataVis3D 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 Q3DBARSRENDERER_p_H
+#define Q3DBARSRENDERER_p_H
+
+#include <QtCore/QSize>
+#include <QtCore/QObject>
+#include <QtGui/QOpenGLFunctions>
+#include <QtGui/QFont>
+#include <QTime>
+#include <QWindow>
+#include <QMutex>
+
+#include "datavis3dglobal_p.h"
+#include "bars3dcontroller_p.h"
+#include "abstract3drenderer_p.h"
+#include "qbardataproxy.h"
+#include "barrenderitem_p.h"
+
+//#define DISPLAY_RENDER_SPEED
+
+class QPoint;
+class QSizeF;
+class QOpenGLShaderProgram;
+
+QT_DATAVIS3D_BEGIN_NAMESPACE
+
+class ShaderHelper;
+class ObjectHelper;
+class TextureHelper;
+class Theme;
+class Drawer;
+class LabelItem;
+class CameraHelper;
+
+class QT_DATAVIS3D_EXPORT Bars3dRenderer : public Abstract3DRenderer
+{
+    Q_OBJECT
+
+private:
+    // TODO: Filter to the set of attributes to be moved to the model object.
+    Bars3dController *m_controller;
+
+    // Mutex for sharing resources between render and main threads.
+    // TODO this mutex needs to go, too...
+    QMutex m_mutex;
+
+    // Cached state based on emitted signals from the controller
+    QSizeF m_cachedBarThickness;
+    QSizeF m_cachedBarSpacing;
+    bool m_cachedIsSlicingActivated;
+    int m_cachedRowCount;
+    int m_cachedColumnCount;
+
+    // Internal state
+    BarRenderItem *m_selectedBar; // points to renderitem array
+    BarRenderItem *m_previouslySelectedBar; // points to renderitem array
+    QList<BarRenderItem *> *m_sliceSelection;
+    AxisRenderCache *m_sliceCache; // not owned
+    const LabelItem *m_sliceTitleItem; // not owned
+    bool m_xFlipped;
+    bool m_zFlipped;
+    bool m_yFlipped;
+    QRect m_mainViewPort;
+    QRect m_sliceViewPort;
+    bool m_updateLabels;
+    ShaderHelper *m_barShader;
+    ShaderHelper *m_depthShader;
+    ShaderHelper *m_selectionShader;
+    ShaderHelper *m_backgroundShader;
+    ShaderHelper *m_labelShader;
+    ObjectHelper *m_barObj;
+    ObjectHelper *m_backgroundObj;
+    ObjectHelper *m_gridLineObj;
+    ObjectHelper *m_labelObj;
+    TextureHelper *m_textureHelper;
+    GLuint m_bgrTexture;
+    GLuint m_depthTexture;
+    GLuint m_selectionTexture;
+    GLuint m_depthFrameBuffer;
+    GLuint m_selectionFrameBuffer;
+    GLuint m_selectionDepthBuffer;
+    GLfloat m_shadowQualityToShader;
+    GLfloat m_heightNormalizer;
+    GLfloat m_yAdjustment;
+    GLfloat m_rowWidth;
+    GLfloat m_columnDepth;
+    GLfloat m_maxDimension;
+    GLfloat m_scaleX;
+    GLfloat m_scaleZ;
+    GLfloat m_scaleFactor;
+    GLfloat m_maxSceneSize;
+    QVector3D m_selection;
+
+    QPoint m_selectionPointRequest;
+    bool m_isSelectionPointRequestActive;
+
+    bool m_hasHeightAdjustmentChanged;
+    BarRenderItem m_dummyBarRenderItem;
+
+    BarRenderItemArray m_renderItemArray;
+
+#ifdef DISPLAY_RENDER_SPEED
+    bool m_isFirstFrame;
+    QTime m_lastFrameTime;
+    GLint m_numFrames;
+#endif
+
+public:
+    explicit Bars3dRenderer(Bars3dController *controller);
+    ~Bars3dRenderer();
+
+    void updateDataModel(QBarDataProxy *dataProxy);
+    void render(CameraHelper *camera, const GLuint defaultFboHandle = 0);
+
+    QRect mainViewPort();
+
+public slots:
+    void updateBarSpecs(QSizeF thickness = QSizeF(1.0f, 1.0f),
+                        QSizeF spacing = QSizeF(1.0f, 1.0f),
+                        bool relative = true);
+    void updateSelectionMode(QDataVis::SelectionMode newMode);
+    void updateSlicingActive(bool isSlicing);
+    void updateSampleSpace(int rowCount, int columnCount);
+    void updateBackgroundEnabled(bool enable);
+    void updateMeshFileName(const QString &objFileName);
+
+    // Overloaded from abstract renderer
+    virtual void updateAxisRange(QAbstractAxis::AxisOrientation orientation, qreal min, qreal max);
+
+    // Requests that upon next render pass the column and row under the given point is inspected for selection.
+    // Only one request can be queued per render pass at this point. New request will override any pending requests.
+    // After inspection the selectionUpdated signal is emitted.
+    virtual void requestSelectionAtPoint(const QPoint &point);
+
+signals:
+    void selectionUpdated(QVector3D selection);
+
+private:
+    virtual void initializeOpenGL();
+    virtual void initShaders(const QString &vertexShader, const QString &fragmentShader);
+    virtual void updateShadowQuality(QDataVis::ShadowQuality quality);
+    virtual void updateTextures();
+
+    void drawSlicedScene(CameraHelper *camera,
+                         const LabelItem &xLabel, const LabelItem &yLabel, const LabelItem &zLabel);
+    void drawScene(CameraHelper *camera, const GLuint defaultFboHandle);
+    void handleResize();
+
+    void loadBarMesh();
+    void loadBackgroundMesh();
+    void loadGridLineMesh();
+    void loadLabelMesh();
+    void initSelectionShader();
+    void initBackgroundShaders(const QString &vertexShader, const QString &fragmentShader);
+    void initLabelShaders(const QString &vertexShader, const QString &fragmentShader);
+    void initSelectionBuffer();
+#if !defined(QT_OPENGL_ES_2)
+    void initDepthShader();
+    void updateDepthBuffer();
+#endif
+    void calculateSceneScalingFactors();
+    void calculateHeightAdjustment();
+    Abstract3DController::SelectionType isSelected(GLint row, GLint bar);
+
+    Q_DISABLE_COPY(Bars3dRenderer)
+
+    friend class BarRenderItem;
+};
+
+
+QT_DATAVIS3D_END_NAMESPACE
+
+#endif