1 files changed, 103 insertions, 0 deletions
diff --git a/chart2/source/inc/RegressionCurveCalculator.hxx b/chart2/source/inc/RegressionCurveCalculator.hxx
new file mode 100644
index 000000000..6cf1f2914
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+++ b/chart2/source/inc/RegressionCurveCalculator.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 <cppuhelper/implbase.hxx>
+#include <rtl/ustrbuf.hxx>
+
+#include <com/sun/star/chart2/XRegressionCurveCalculator.hpp>
+
+namespace com::sun::star::util { class XNumberFormatsSupplier; }
+namespace com::sun::star::util { class XNumberFormatter; }
+
+namespace chart
+{
+
+class RegressionCurveCalculator : public
+    cppu::WeakImplHelper< css::chart2::XRegressionCurveCalculator >
+{
+public:
+    RegressionCurveCalculator();
+    virtual ~RegressionCurveCalculator() override;
+
+    static bool isLinearScaling(
+        const css::uno::Reference< css::chart2::XScaling >& xScaling );
+
+    static bool isLogarithmicScaling(
+        const css::uno::Reference< css::chart2::XScaling >& xScaling );
+
+protected:
+    virtual OUString ImplGetRepresentation(
+        const css::uno::Reference< css::util::XNumberFormatter >& xNumFormatter,
+        sal_Int32 nNumberFormatKey, sal_Int32* pFormulaLength = nullptr ) const = 0;
+
+    static OUString getFormattedString(
+        const css::uno::Reference< css::util::XNumberFormatter >& xNumFormatter,
+        sal_Int32 nNumberFormatKey,
+        double fNumber,
+        const sal_Int32* pStringLength );
+
+    static void addStringToEquation( OUStringBuffer& aStrEquation, sal_Int32& nLineLength, OUStringBuffer const & aAddString, const sal_Int32* pMaxLength );
+
+    double m_fCorrelationCoefficient;
+
+    sal_Int32 mDegree;
+    bool  mForceIntercept;
+    double    mInterceptValue;
+    sal_Int32 mPeriod;
+    OUString mXName, mYName;
+    sal_Int32 mnMovingType;
+
+    // ____ XRegressionCurveCalculator ____
+    virtual void SAL_CALL setRegressionProperties(
+        sal_Int32 aDegree,
+        sal_Bool  aForceIntercept,
+        double    aInterceptValue,
+        sal_Int32 aPeriod,
+        sal_Int32 nMovingType) override;
+
+    virtual void SAL_CALL recalculateRegression(
+        const css::uno::Sequence< double >& aXValues,
+        const css::uno::Sequence< double >& aYValues ) override = 0;
+
+    virtual double SAL_CALL getCurveValue( double x ) override = 0;
+
+    virtual css::uno::Sequence< css::geometry::RealPoint2D > SAL_CALL getCurveValues(
+        double min,
+        double max,
+        sal_Int32 nPointCount,
+        const css::uno::Reference< css::chart2::XScaling >& xScalingX,
+        const css::uno::Reference< css::chart2::XScaling >& xScalingY,
+        sal_Bool bMaySkipPointsInCalculation ) override;
+
+    virtual double SAL_CALL getCorrelationCoefficient() override;
+
+    virtual OUString SAL_CALL getRepresentation() override;
+
+    virtual OUString SAL_CALL getFormattedRepresentation(
+        const css::uno::Reference< css::util::XNumberFormatsSupplier >& xNumFmtSupplier,
+        sal_Int32 nNumberFormatKey, sal_Int32 nFormulaLength ) override;
+
+    virtual void SAL_CALL setXYNames(
+        const OUString& aXName, const OUString& aYName ) override;
+};
+
+} //  namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */