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diff --git a/chart2/source/inc/RelativePositionHelper.hxx b/chart2/source/inc/RelativePositionHelper.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
+
+#include <com/sun/star/chart2/RelativePosition.hpp>
+#include <com/sun/star/drawing/Alignment.hpp>
+#include <com/sun/star/awt/Point.hpp>
+#include "charttoolsdllapi.hxx"
+
+namespace com::sun::star::awt { struct Size; }
+namespace com::sun::star::chart2 { struct RelativeSize; }
+
+namespace chart
+{
+
+class OOO_DLLPUBLIC_CHARTTOOLS RelativePositionHelper
+{
+public:
+    /** returns the upper left corner of an object that has size aObjectSize and
+        where the point indicated by aAnchor has coordinates indicated by aPoint
+        ( e.g. if aAnchor equals BOTTOM_LEFT, aPoint describes the
+        coordinates of the bottom left corner of an object with size aObjectSize )
+     */
+    static css::awt::Point
+        getUpperLeftCornerOfAnchoredObject(
+            css::awt::Point aPoint,
+            css::awt::Size aObjectSize,
+            css::drawing::Alignment aAnchor );
+
+    /** returns the center of an object that has size aObjectSize and
+        where the point indicated by aAnchor has coordinates indicated by aPoint
+        ( e.g. if aAnchor equals BOTTOM_LEFT, aPoint describes the
+        coordinates of the bottom left corner of an object with size aObjectSize )
+     */
+    static css::awt::Point
+        getCenterOfAnchoredObject(
+            css::awt::Point aPoint,
+            css::awt::Size aUnrotatedObjectSize,
+            css::drawing::Alignment aAnchor,
+            double fAnglePi );
+
+    /** Returns a relative position that is the same point after the anchor has
+        been changed to the given one.  The passed object size is taken into
+        account for shifting the position.
+     */
+    SAL_DLLPRIVATE static css::chart2::RelativePosition
+        getReanchoredPosition(
+            const css::chart2::RelativePosition & rPosition,
+            const css::chart2::RelativeSize & rObjectSize,
+            css::drawing::Alignment aNewAnchor );
+
+    /** grows a relative size about the given amount and shifts the given
+        position such that the resize is relative to the former rectangle's
+        center.
+
+        The resize is only done, if after
+        transformation, the position and size are within the bounds [0,1].
+
+        @return </sal_True>, if changes were applied.
+
+        <p>That means, if the position's alignment is center, the position will
+        not change at all.</p>
+     */
+    static bool centerGrow(
+        css::chart2::RelativePosition & rInOutPosition,
+        css::chart2::RelativeSize & rInOutSize,
+        double fAmountX, double fAmountY );
+
+    /** shifts a relative position about the given amount
+
+        The shift is only done, if after
+        transformation, the object represented by the position
+        rInOutPosition and its size rObjectSize the position and size are
+        within the bounds [0,1].
+
+        @return </sal_True>, if changes were applied.
+     */
+    static bool moveObject(
+        css::chart2::RelativePosition & rInOutPosition,
+        const css::chart2::RelativeSize & rObjectSize,
+        double fAmountX, double fAmountY );
+};
+
+} //namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */