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diff --git a/chart2/source/view/inc/MinimumAndMaximumSupplier.hxx b/chart2/source/view/inc/MinimumAndMaximumSupplier.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 <sal/types.h>
+#include <tools/date.hxx>
+#include <tools/long.hxx>
+#include <set>
+
+namespace chart
+{
+
+class MinimumAndMaximumSupplier
+{
+public:
+    virtual double getMinimumX() = 0;
+    virtual double getMaximumX() = 0;
+
+    //problem y maybe not is always the second border to ask for
+    virtual double getMinimumYInRange( double fMinimumX, double fMaximumX, sal_Int32 nAxisIndex ) = 0;
+    virtual double getMaximumYInRange( double fMinimumX, double fMaximumX, sal_Int32 nAxisIndex ) = 0;
+
+    //problem: z maybe not independent in future
+    virtual double getMinimumZ() = 0;
+    virtual double getMaximumZ() = 0;
+
+    virtual bool isExpandBorderToIncrementRhythm( sal_Int32 nDimensionIndex ) = 0;
+    virtual bool isExpandIfValuesCloseToBorder( sal_Int32 nDimensionIndex ) = 0;
+    virtual bool isExpandWideValuesToZero( sal_Int32 nDimensionIndex ) = 0;
+    virtual bool isExpandNarrowValuesTowardZero( sal_Int32 nDimensionIndex ) = 0;
+    virtual bool isSeparateStackingForDifferentSigns( sal_Int32 nDimensionIndex ) = 0;
+
+    //return a constant out of css::chart::TimeUnit that allows to display the smallest distance between occurring dates
+    virtual tools::Long calculateTimeResolutionOnXAxis() = 0;
+    virtual void setTimeResolutionOnXAxis( tools::Long nTimeResolution, const Date& rNullDate ) = 0;
+
+protected:
+    ~MinimumAndMaximumSupplier() {}
+};
+
+class MergedMinimumAndMaximumSupplier final : public MinimumAndMaximumSupplier
+{
+public:
+    MergedMinimumAndMaximumSupplier();
+    virtual ~MergedMinimumAndMaximumSupplier();
+
+    void addMinimumAndMaximumSupplier( MinimumAndMaximumSupplier* pMinimumAndMaximumSupplier );
+    bool hasMinimumAndMaximumSupplier( MinimumAndMaximumSupplier* pMinimumAndMaximumSupplier );
+    void clearMinimumAndMaximumSupplierList();
+
+    //--MinimumAndMaximumSupplier
+    virtual double getMinimumX() override;
+    virtual double getMaximumX() override;
+    virtual double getMinimumYInRange( double fMinimumX, double fMaximumX, sal_Int32 nAxisIndex ) override;
+    virtual double getMaximumYInRange( double fMinimumX, double fMaximumX, sal_Int32 nAxisIndex ) override;
+    virtual double getMinimumZ() override;
+    virtual double getMaximumZ() override;
+
+    virtual bool isExpandBorderToIncrementRhythm( sal_Int32 nDimensionIndex ) override;
+    virtual bool isExpandIfValuesCloseToBorder( sal_Int32 nDimensionIndex ) override;
+    virtual bool isExpandWideValuesToZero( sal_Int32 nDimensionIndex ) override;
+    virtual bool isExpandNarrowValuesTowardZero( sal_Int32 nDimensionIndex ) override;
+    virtual bool isSeparateStackingForDifferentSigns( sal_Int32 nDimensionIndex ) override;
+
+    virtual tools::Long calculateTimeResolutionOnXAxis() override;
+    virtual void setTimeResolutionOnXAxis( tools::Long nTimeResolution, const Date& rNullDate ) override;
+
+private:
+    typedef std::set< MinimumAndMaximumSupplier* > MinimumAndMaximumSupplierSet;
+    MinimumAndMaximumSupplierSet m_aMinimumAndMaximumSupplierList;
+};
+
+} //namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */