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diff --git a/chart2/source/view/charttypes/CategoryPositionHelper.hxx b/chart2/source/view/charttypes/CategoryPositionHelper.hxx
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index 000000000..ebc784ef6
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+++ b/chart2/source/view/charttypes/CategoryPositionHelper.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+namespace chart
+{
+class CategoryPositionHelper
+{
+public:
+    CategoryPositionHelper(double fSeriesCount, double CategoryWidth = 1.0);
+    virtual ~CategoryPositionHelper();
+
+    CategoryPositionHelper(CategoryPositionHelper const&) = default;
+    CategoryPositionHelper(CategoryPositionHelper&&) = default;
+    CategoryPositionHelper& operator=(CategoryPositionHelper const&) = default;
+    CategoryPositionHelper& operator=(CategoryPositionHelper&&) = default;
+
+    double getScaledSlotWidth() const;
+    virtual double getScaledSlotPos(double fCategoryX, double fSeriesNumber) const;
+    void setCategoryWidth(double fCategoryWidth);
+
+    //Distance between two neighboring bars in same category, seen relative to width of the bar
+    void setInnerDistance(double fInnerDistance);
+
+    //Distance between two neighboring bars in different category, seen relative to width of the bar:
+    void setOuterDistance(double fOuterDistance);
+
+protected:
+    double m_fSeriesCount;
+    double m_fCategoryWidth;
+    //Distance between two neighboring bars in same category, seen relative to width of the bar:
+    double
+        m_fInnerDistance; //[-1,1] m_fInnerDistance=1 --> distance == width; m_fInnerDistance=-1-->all rects are painted on the same position
+    //Distance between two neighboring bars in different category, seen relative to width of the bar:
+    double m_fOuterDistance; //>=0 m_fOuterDistance=1 --> distance == width
+};
+
+} //namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */