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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 .
*/
#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_fCorrelationCoeffitient(0.0),
mDegree(2),
mForceIntercept(false),
mInterceptValue(0.0),
mPeriod(2),
mXName("x"), mYName("f(x)")
{
rtl::math::setNan( &m_fCorrelationCoeffitient );
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("###");
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_fCorrelationCoeffitient;
}
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: */
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