1 files changed, 110 insertions, 0 deletions
diff --git a/chart2/source/tools/MovingAverageRegressionCurveCalculator.cxx b/chart2/source/tools/MovingAverageRegressionCurveCalculator.cxx
new file mode 100644
index 000000000000..1157cbe64179
--- /dev/null
+++ b/chart2/source/tools/MovingAverageRegressionCurveCalculator.cxx
@@ -0,0 +1,110 @@
+/* -*- 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 .
+ */
+
+#include "MovingAverageRegressionCurveCalculator.hxx"
+#include "RegressionCalculationHelper.hxx"
+#include "macros.hxx"
+
+#include <rtl/math.hxx>
+#include <rtl/ustrbuf.hxx>
+#include "gauss.hxx"
+
+using namespace ::com::sun::star;
+
+
+namespace chart
+{
+
+MovingAverageRegressionCurveCalculator::MovingAverageRegressionCurveCalculator()
+{}
+
+MovingAverageRegressionCurveCalculator::~MovingAverageRegressionCurveCalculator()
+{}
+
+// ____ XRegressionCurveCalculator ____
+void SAL_CALL MovingAverageRegressionCurveCalculator::recalculateRegression(
+    const uno::Sequence< double >& aXValues,
+    const uno::Sequence< double >& aYValues )
+    throw (uno::RuntimeException)
+{
+    ::rtl::math::setNan( & m_fCorrelationCoeffitient );
+
+    RegressionCalculationHelper::tDoubleVectorPair aValues(
+        RegressionCalculationHelper::cleanup(
+            aXValues, aYValues,
+            RegressionCalculationHelper::isValid()));
+
+    const size_t aSize = aValues.first.size();
+
+    for( size_t i = mPeriod - 1; i < aSize; ++i )
+    {
+        double yAvg;
+        yAvg = 0.0;
+
+        for (sal_Int32 j = 0; j < mPeriod; j++)
+        {
+            yAvg += aValues.second[i - j];
+        }
+        yAvg /= mPeriod;
+
+        double x = aValues.first[i];
+        aYList.push_back(yAvg);
+        aXList.push_back(x);
+    }
+}
+
+double SAL_CALL MovingAverageRegressionCurveCalculator::getCurveValue( double /*x*/ )
+    throw (lang::IllegalArgumentException,
+           uno::RuntimeException)
+{
+    double fResult;
+    rtl::math::setNan(&fResult);
+    return fResult;
+}
+
+uno::Sequence< geometry::RealPoint2D > SAL_CALL MovingAverageRegressionCurveCalculator::getCurveValues(
+    double /*min*/, double /*max*/, sal_Int32 /*nPointCount*/,
+    const uno::Reference< chart2::XScaling >& /*xScalingX*/,
+    const uno::Reference< chart2::XScaling >& /*xScalingY*/,
+    sal_Bool /*bMaySkipPointsInCalculation*/ )
+    throw (lang::IllegalArgumentException,
+           uno::RuntimeException)
+{
+    uno::Sequence< geometry::RealPoint2D > aResult( aYList.size() );
+
+    for( size_t i = 0; i < aYList.size(); ++i )
+    {
+        aResult[i].X = aXList[i];
+        aResult[i].Y = aYList[i];
+    }
+    return aResult;
+}
+
+OUString MovingAverageRegressionCurveCalculator::ImplGetRepresentation(
+    const uno::Reference< util::XNumberFormatter >& /*xNumFormatter*/,
+    ::sal_Int32 /*nNumberFormatKey*/ ) const
+{
+    OUStringBuffer aBuf( "f(x) = N/A");
+
+    return aBuf.makeStringAndClear();
+}
+
+} //  namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */