1 files changed, 71 insertions, 0 deletions
diff --git a/chart2/source/tools/LinearRegressionCurveCalculator.cxx b/chart2/source/tools/LinearRegressionCurveCalculator.cxx
new file mode 100644
index 000000000..9cf3492d8
--- /dev/null
+++ b/chart2/source/tools/LinearRegressionCurveCalculator.cxx
@@ -0,0 +1,71 @@
+/* -*- 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 <LinearRegressionCurveCalculator.hxx>
+
+using namespace ::com::sun::star;
+
+namespace chart
+{
+
+LinearRegressionCurveCalculator::LinearRegressionCurveCalculator() :
+    PolynomialRegressionCurveCalculator()
+{}
+
+LinearRegressionCurveCalculator::~LinearRegressionCurveCalculator()
+{}
+
+void LinearRegressionCurveCalculator::setRegressionProperties(
+    sal_Int32 /*aDegree*/,
+    sal_Bool  aForceIntercept,
+    double    aInterceptValue,
+    sal_Int32 aPeriod )
+{
+    PolynomialRegressionCurveCalculator::setRegressionProperties(
+                                            1,
+                                            aForceIntercept,
+                                            aInterceptValue,
+                                            aPeriod);
+}
+
+uno::Sequence< geometry::RealPoint2D > SAL_CALL LinearRegressionCurveCalculator::getCurveValues(
+    double min, double max, ::sal_Int32 nPointCount,
+    const uno::Reference< chart2::XScaling >& xScalingX,
+    const uno::Reference< chart2::XScaling >& xScalingY,
+    sal_Bool bMaySkipPointsInCalculation )
+{
+    if( bMaySkipPointsInCalculation &&
+        isLinearScaling( xScalingX ) &&
+        isLinearScaling( xScalingY ))
+    {
+        // optimize result
+        uno::Sequence< geometry::RealPoint2D > aResult( 2 );
+        aResult[0].X = min;
+        aResult[0].Y = getCurveValue( min );
+        aResult[1].X = max;
+        aResult[1].Y = getCurveValue( max );
+
+        return aResult;
+    }
+    return RegressionCurveCalculator::getCurveValues( min, max, nPointCount, xScalingX, xScalingY, bMaySkipPointsInCalculation );
+}
+
+} //  namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */