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Diffstat (limited to 'chart2/source/tools/RegressionCurveCalculator.cxx')
| -rw-r--r-- | chart2/source/tools/RegressionCurveCalculator.cxx | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/chart2/source/tools/RegressionCurveCalculator.cxx b/chart2/source/tools/RegressionCurveCalculator.cxx new file mode 100644 index 000000000..5b65375b0 --- /dev/null +++ b/chart2/source/tools/RegressionCurveCalculator.cxx @@ -0,0 +1,220 @@ +/* -*- 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 <RegressionCurveCalculator.hxx> + +#include <comphelper/processfactory.hxx> +#include <rtl/math.hxx> + +#include <com/sun/star/lang/XServiceName.hpp> +#include <com/sun/star/util/NumberFormatter.hpp> + +#include <comphelper/numbers.hxx> +#include <comphelper/extract.hxx> + +using namespace ::com::sun::star; + +using ::com::sun::star::uno::Reference; +using ::com::sun::star::uno::Sequence; + +namespace chart +{ + +RegressionCurveCalculator::RegressionCurveCalculator() : + m_fCorrelationCoefficient(0.0), + mDegree(2), + mForceIntercept(false), + mInterceptValue(0.0), + mPeriod(2), + mXName("x"), mYName("f(x)") +{ + rtl::math::setNan( &m_fCorrelationCoefficient ); + rtl::math::setNan( &mInterceptValue ); +} + +RegressionCurveCalculator::~RegressionCurveCalculator() +{} + +bool RegressionCurveCalculator::isLinearScaling( + const Reference< chart2::XScaling > & xScaling ) +{ + // no scaling means linear + if( !xScaling.is()) + return true; + uno::Reference< lang::XServiceName > xServiceName( xScaling, uno::UNO_QUERY ); + return xServiceName.is() && xServiceName->getServiceName() == "com.sun.star.chart2.LinearScaling"; +} + +bool RegressionCurveCalculator::isLogarithmicScaling( + const Reference< chart2::XScaling > & xScaling ) +{ + uno::Reference< lang::XServiceName > xServiceName( xScaling, uno::UNO_QUERY ); + return xServiceName.is() && xServiceName->getServiceName() == "com.sun.star.chart2.LogarithmicScaling"; +} + +void RegressionCurveCalculator::setRegressionProperties( + sal_Int32 aDegree, + sal_Bool aForceIntercept, + double aInterceptValue, + sal_Int32 aPeriod ) +{ + mDegree = aDegree; + mForceIntercept = aForceIntercept; + mInterceptValue = aInterceptValue; + mPeriod = aPeriod; +} + +OUString RegressionCurveCalculator::getFormattedString( + const Reference< util::XNumberFormatter >& xNumFormatter, + sal_Int32 nNumberFormatKey, + double fNumber, const sal_Int32* pStringLength /* = nullptr */ ) +{ + if ( pStringLength && *pStringLength <= 0 ) + return "###"; + OUString aResult; + + if( xNumFormatter.is() ) + { + bool bStandard = ::cppu::any2bool( ::comphelper::getNumberFormatProperty( xNumFormatter, nNumberFormatKey, "StandardFormat" ) ); + if( pStringLength && bStandard ) + { // round fNumber to *pStringLength characters + const sal_Int32 nMinDigit = 6; // minimum significant digits for General format + sal_Int32 nSignificantDigit = ( *pStringLength <= nMinDigit ? nMinDigit : *pStringLength ); + aResult = OStringToOUString( + ::rtl::math::doubleToString( fNumber, rtl_math_StringFormat_G1, nSignificantDigit, '.', true ), + RTL_TEXTENCODING_ASCII_US ); + // count characters different from significant digits (decimal separator, scientific notation) + sal_Int32 nExtraChar = aResult.getLength() - *pStringLength; + if ( nExtraChar > 0 && *pStringLength > nMinDigit ) + { + nSignificantDigit = *pStringLength - nExtraChar; + if ( nSignificantDigit < nMinDigit ) + nSignificantDigit = nMinDigit; + aResult = OStringToOUString( + ::rtl::math::doubleToString( fNumber, rtl_math_StringFormat_G1, nSignificantDigit, '.', true ), + RTL_TEXTENCODING_ASCII_US ); + } + fNumber = ::rtl::math::stringToDouble( aResult, '.', ',' ); + } + aResult = xNumFormatter->convertNumberToString( nNumberFormatKey, fNumber ); + } + else + { + sal_Int32 nStringLength = 4; // default length + if ( pStringLength ) + nStringLength = *pStringLength; + aResult = OStringToOUString( + ::rtl::math::doubleToString( fNumber, rtl_math_StringFormat_G1, nStringLength, '.', true ), + RTL_TEXTENCODING_ASCII_US ); + } + return aResult; +} + +Sequence< geometry::RealPoint2D > SAL_CALL RegressionCurveCalculator::getCurveValues( + double min, double max, ::sal_Int32 nPointCount, + const Reference< chart2::XScaling >& xScalingX, + const Reference< chart2::XScaling >& /* xScalingY */, + sal_Bool /* bMaySkipPointsInCalculation */ ) +{ + if( nPointCount < 2 ) + throw lang::IllegalArgumentException(); + + // determine if scaling and inverse scaling for x-values work + bool bDoXScaling( xScalingX.is()); + uno::Reference< chart2::XScaling > xInverseScaling; + if( bDoXScaling ) + xInverseScaling.set( xScalingX->getInverseScaling()); + bDoXScaling = bDoXScaling && xInverseScaling.is(); + + Sequence< geometry::RealPoint2D > aResult( nPointCount ); + + double fMin( min ); + double fFact = (max - min) / double(nPointCount-1); + + if( bDoXScaling ) + { + fMin = xScalingX->doScaling( min ); + fFact = (xScalingX->doScaling( max ) - fMin) / double(nPointCount-1); + } + + for(sal_Int32 nP=0; nP<nPointCount; nP++) + { + double x = fMin + nP * fFact; + if( bDoXScaling ) + x = xInverseScaling->doScaling( x ); + aResult[nP].X = x; + aResult[nP].Y = getCurveValue( x ); + } + + return aResult; +} + +double SAL_CALL RegressionCurveCalculator::getCorrelationCoefficient() +{ + return m_fCorrelationCoefficient; +} + +OUString SAL_CALL RegressionCurveCalculator::getRepresentation() +{ + return ImplGetRepresentation( Reference< util::XNumberFormatter >(), 0 ); +} + +OUString SAL_CALL RegressionCurveCalculator::getFormattedRepresentation( + const Reference< util::XNumberFormatsSupplier > & xNumFmtSupplier, + sal_Int32 nNumberFormatKey, sal_Int32 nFormulaLength ) +{ + // create and prepare a number formatter + if( !xNumFmtSupplier.is()) + return getRepresentation(); + Reference< uno::XComponentContext > xContext( comphelper::getProcessComponentContext(), uno::UNO_SET_THROW ); + Reference< util::XNumberFormatter > xNumFormatter( util::NumberFormatter::create(xContext), uno::UNO_QUERY_THROW ); + xNumFormatter->attachNumberFormatsSupplier( xNumFmtSupplier ); + + if ( nFormulaLength > 0 ) + return ImplGetRepresentation( xNumFormatter, nNumberFormatKey, &nFormulaLength ); + return ImplGetRepresentation( xNumFormatter, nNumberFormatKey ); +} + +void RegressionCurveCalculator::addStringToEquation( + OUStringBuffer& aStrEquation, sal_Int32& nLineLength, OUStringBuffer const & aAddString, const sal_Int32* pMaxWidth) +{ + if ( pMaxWidth && ( nLineLength + aAddString.getLength() > *pMaxWidth ) ) + { // wrap line + aStrEquation.append( "\n " ); // start new line with a blank + nLineLength = 1; + } + aStrEquation.append( aAddString ); + nLineLength += aAddString.getLength(); +} + +void SAL_CALL RegressionCurveCalculator::setXYNames( const OUString& aXName, const OUString& aYName ) +{ + if ( aXName.isEmpty() ) + mXName = OUString ("x"); + else + mXName = aXName; + if ( aYName.isEmpty() ) + mYName = OUString ("f(x)"); + else + mYName = aYName; +} + +} // namespace chart + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |