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diff --git a/chart2/source/inc/chartview/ExplicitValueProvider.hxx b/chart2/source/inc/chartview/ExplicitValueProvider.hxx
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+++ b/chart2/source/inc/chartview/ExplicitValueProvider.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 <chartview/chartviewdllapi.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+
+#include <memory>
+
+namespace com::sun::star::beans { class XPropertySet; }
+namespace com::sun::star::chart2 { class XAxis; }
+namespace com::sun::star::chart2 { class XChartDocument; }
+namespace com::sun::star::chart2 { class XCoordinateSystem; }
+namespace com::sun::star::chart2 { class XDataSeries; }
+namespace com::sun::star::chart2 { class XDiagram; }
+namespace com::sun::star::drawing { class XShape; }
+namespace com::sun::star::uno { class XInterface; }
+namespace com::sun::star::uno { template <typename > class Reference; }
+namespace com::sun::star::uno { template <typename > class Sequence; }
+namespace com::sun::star::util { class XNumberFormatsSupplier; }
+namespace com::sun::star::awt { struct Rectangle; }
+class SvxShape;
+
+namespace chart
+{
+
+class BaseCoordinateSystem;
+class DrawModelWrapper;
+class ChartModel;
+struct ExplicitIncrementData;
+struct ExplicitScaleData;
+
+class OOO_DLLPUBLIC_CHARTVIEW ExplicitValueProvider
+{
+public:
+    /** Gives calculated scale and increment values for a given xAxis in the current view.
+        In contrast to the model data these explicit values are always complete as missing auto properties are calculated.
+        If the given Axis could not be found or for another reason no correct output can be given false is returned.
+     */
+    virtual bool getExplicitValuesForAxis(
+        css::uno::Reference< css::chart2::XAxis > xAxis
+        , ExplicitScaleData&  rExplicitScale
+        , ExplicitIncrementData& rExplicitIncrement )=0;
+
+    /** for rotated objects the shape size and position differs from the visible rectangle
+        if bSnapRect is set to true you get the resulting visible position (left-top) and size
+    */
+    virtual css::awt::Rectangle
+        getRectangleOfObject( const OUString& rObjectCID, bool bSnapRect=false )=0;
+
+    virtual css::awt::Rectangle getDiagramRectangleExcludingAxes()=0;
+
+    virtual rtl::Reference< SvxShape >
+        getShapeForCID( const OUString& rObjectCID )=0;
+
+    virtual std::shared_ptr< DrawModelWrapper > getDrawModelWrapper() = 0;
+
+    static const css::uno::Sequence<sal_Int8>& getUnoTunnelId();
+
+    static css::awt::Rectangle
+        AddSubtractAxisTitleSizes(
+                ChartModel& rModel
+            , ExplicitValueProvider* pChartView
+            , const css::awt::Rectangle& rPositionAndSize, bool bSubtract );
+
+    static sal_Int32 getExplicitNumberFormatKeyForAxis(
+              const css::uno::Reference< css::chart2::XAxis >& xAxis
+            , const rtl::Reference< ::chart::BaseCoordinateSystem > & xCorrespondingCoordinateSystem
+            , const rtl::Reference<::chart::ChartModel>& xChartDoc);
+
+    static sal_Int32 getExplicitNumberFormatKeyForDataLabel(
+            const css::uno::Reference< css::beans::XPropertySet >& xSeriesOrPointProp );
+
+    static sal_Int32 getExplicitPercentageNumberFormatKeyForDataLabel(
+            const css::uno::Reference< css::beans::XPropertySet >& xSeriesOrPointProp
+            , const css::uno::Reference< css::util::XNumberFormatsSupplier >& xNumberFormatsSupplier );
+
+protected:
+    ~ExplicitValueProvider() = default;
+};
+
+} //namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */