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| -rw-r--r-- | chart2/source/view/main/PolarLabelPositionHelper.cxx | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/chart2/source/view/main/PolarLabelPositionHelper.cxx b/chart2/source/view/main/PolarLabelPositionHelper.cxx new file mode 100644 index 000000000..d5c819954 --- /dev/null +++ b/chart2/source/view/main/PolarLabelPositionHelper.cxx @@ -0,0 +1,158 @@ +/* -*- 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 <PolarLabelPositionHelper.hxx> +#include <PlottingPositionHelper.hxx> +#include <basegfx/vector/b2dvector.hxx> +#include <basegfx/vector/b2ivector.hxx> + +#include <com/sun/star/chart/DataLabelPlacement.hpp> + +namespace chart +{ +using namespace ::com::sun::star; +using namespace ::com::sun::star::chart2; + +PolarLabelPositionHelper::PolarLabelPositionHelper( + PolarPlottingPositionHelper* pPosHelper + , sal_Int32 nDimensionCount + , const rtl::Reference<SvxShapeGroupAnyD>& xLogicTarget ) + : LabelPositionHelper( nDimensionCount, xLogicTarget ) + , m_pPosHelper(pPosHelper) +{ +} + +PolarLabelPositionHelper::~PolarLabelPositionHelper() +{ +} + +awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForLogicValues( + LabelAlignment& rAlignment + , double fLogicValueOnAngleAxis + , double fLogicValueOnRadiusAxis + , double fLogicZ + , sal_Int32 nScreenValueOffsetInRadiusDirection ) const +{ + double fUnitCircleAngleDegree = m_pPosHelper->transformToAngleDegree( fLogicValueOnAngleAxis ); + double fUnitCircleRadius = m_pPosHelper->transformToRadius( fLogicValueOnRadiusAxis ); + + return getLabelScreenPositionAndAlignmentForUnitCircleValues( + rAlignment, css::chart::DataLabelPlacement::OUTSIDE + , fUnitCircleAngleDegree, 0.0 + , fUnitCircleRadius, fUnitCircleRadius, fLogicZ, nScreenValueOffsetInRadiusDirection ); +} + +awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForUnitCircleValues( + LabelAlignment& rAlignment, sal_Int32 nLabelPlacement + , double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree + , double fUnitCircleInnerRadius, double fUnitCircleOuterRadius + , double fLogicZ + , sal_Int32 nScreenValueOffsetInRadiusDirection ) const +{ + bool bCenter = (nLabelPlacement != css::chart::DataLabelPlacement::OUTSIDE) + && (nLabelPlacement != css::chart::DataLabelPlacement::INSIDE); + + double fAngleDegree = fUnitCircleStartAngleDegree + fUnitCircleWidthAngleDegree/2.0; + double fRadius = 0.0; + if( !bCenter ) //e.g. for pure pie chart(one ring only) or for angle axis of polar coordinate system + fRadius = fUnitCircleOuterRadius; + else + fRadius = fUnitCircleInnerRadius + (fUnitCircleOuterRadius-fUnitCircleInnerRadius)/2.0 ; + + awt::Point aRet( transformSceneToScreenPosition( + m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ+0.5 ) ) ); + + if(m_nDimensionCount==3 && nLabelPlacement == css::chart::DataLabelPlacement::OUTSIDE) + { + //check whether the upper or the downer edge is more distant from the center + //take the farthest point to put the label to + + awt::Point aP0( transformSceneToScreenPosition( + m_pPosHelper->transformUnitCircleToScene( 0, 0, fLogicZ ) ) ); + awt::Point aP1(aRet); + awt::Point aP2( transformSceneToScreenPosition( + m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ-0.5 ) ) ); + + ::basegfx::B2DVector aV0( aP0.X, aP0.Y ); + ::basegfx::B2DVector aV1( aP1.X, aP1.Y ); + ::basegfx::B2DVector aV2( aP2.X, aP2.Y ); + + double fL1 = ::basegfx::B2DVector(aV1-aV0).getLength(); + double fL2 = ::basegfx::B2DVector(aV2-aV0).getLength(); + + if(fL2>fL1) + aRet = aP2; + + //calculate new angle for alignment + double fDX = aRet.X-aP0.X; + double fDY = aRet.Y-aP0.Y; + fDY*=-1.0;//drawing layer has inverse y values + + fAngleDegree = basegfx::rad2deg(atan2(fDY,fDX)); + } + //set LabelAlignment + if( !bCenter ) + { + // tdf#123504: both 0 and 360 are valid and different values here! + while (fAngleDegree > 360.0) + fAngleDegree -= 360.0; + while (fAngleDegree < 0.0) + fAngleDegree += 360.0; + + bool bOutside = nLabelPlacement == css::chart::DataLabelPlacement::OUTSIDE; + + if (fAngleDegree <= 5 || fAngleDegree >= 355) + rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT; + else if (fAngleDegree < 85) + rAlignment = bOutside ? LABEL_ALIGN_RIGHT_TOP : LABEL_ALIGN_LEFT_BOTTOM; + else if (fAngleDegree <= 95) + rAlignment = bOutside ? LABEL_ALIGN_TOP : LABEL_ALIGN_BOTTOM; + else if (fAngleDegree < 175) + rAlignment = bOutside ? LABEL_ALIGN_LEFT_TOP : LABEL_ALIGN_RIGHT_BOTTOM; + else if (fAngleDegree <= 185) + rAlignment = bOutside ? LABEL_ALIGN_LEFT : LABEL_ALIGN_RIGHT; + else if (fAngleDegree < 265) + rAlignment = bOutside ? LABEL_ALIGN_LEFT_BOTTOM : LABEL_ALIGN_RIGHT_TOP; + else if (fAngleDegree <= 275) + rAlignment = bOutside ? LABEL_ALIGN_BOTTOM : LABEL_ALIGN_TOP; + else + rAlignment = bOutside ? LABEL_ALIGN_RIGHT_BOTTOM : LABEL_ALIGN_LEFT_TOP; + } + else + { + rAlignment = LABEL_ALIGN_CENTER; + } + + //add a scaling independent Offset if requested + if( nScreenValueOffsetInRadiusDirection != 0) + { + awt::Point aOrigin( transformSceneToScreenPosition( + m_pPosHelper->transformUnitCircleToScene( 0.0, 0.0, fLogicZ+0.5 ) ) ); + basegfx::B2IVector aDirection( aRet.X- aOrigin.X, aRet.Y- aOrigin.Y ); + aDirection.setLength(nScreenValueOffsetInRadiusDirection); + aRet.X += aDirection.getX(); + aRet.Y += aDirection.getY(); + } + + return aRet; +} + +} //namespace chart + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |