174 lines
6.9 KiB
C++
174 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "PolarLabelPositionHelper.hxx"
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#include "PlottingPositionHelper.hxx"
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#include "CommonConverters.hxx"
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#include <basegfx/vector/b2dvector.hxx>
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#include <basegfx/vector/b2ivector.hxx>
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#include <com/sun/star/chart/DataLabelPlacement.hpp>
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namespace chart
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{
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using namespace ::com::sun::star;
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using namespace ::com::sun::star::chart2;
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PolarLabelPositionHelper::PolarLabelPositionHelper(
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PolarPlottingPositionHelper* pPosHelper
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, sal_Int32 nDimensionCount
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, const uno::Reference< drawing::XShapes >& xLogicTarget
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, AbstractShapeFactory* pShapeFactory )
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: LabelPositionHelper( pPosHelper, nDimensionCount, xLogicTarget, pShapeFactory )
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, m_pPosHelper(pPosHelper)
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{
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}
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PolarLabelPositionHelper::~PolarLabelPositionHelper()
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{
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}
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awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForLogicValues(
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LabelAlignment& rAlignment
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, double fLogicValueOnAngleAxis
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, double fLogicValueOnRadiusAxis
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, double fLogicZ
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, sal_Int32 nScreenValueOffsetInRadiusDirection ) const
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{
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double fUnitCircleAngleDegree = m_pPosHelper->transformToAngleDegree( fLogicValueOnAngleAxis );
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double fUnitCircleRadius = m_pPosHelper->transformToRadius( fLogicValueOnRadiusAxis );
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return getLabelScreenPositionAndAlignmentForUnitCircleValues(
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rAlignment, ::com::sun::star::chart::DataLabelPlacement::OUTSIDE
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, fUnitCircleAngleDegree, 0.0
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, fUnitCircleRadius, fUnitCircleRadius, fLogicZ, nScreenValueOffsetInRadiusDirection );
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}
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awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForUnitCircleValues(
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LabelAlignment& rAlignment, sal_Int32 nLabelPlacement
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, double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree
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, double fUnitCircleInnerRadius, double fUnitCircleOuterRadius
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, double fLogicZ
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, sal_Int32 nScreenValueOffsetInRadiusDirection ) const
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{
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bool bCenter = (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
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&& (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::INSIDE);
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double fAngleDegree = fUnitCircleStartAngleDegree + fUnitCircleWidthAngleDegree/2.0;
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double fRadius = 0.0;
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if( !bCenter ) //e.g. for pure pie chart(one ring only) or for angle axis of polyar coordinate system
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fRadius = fUnitCircleOuterRadius;
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else
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fRadius = fUnitCircleInnerRadius + (fUnitCircleOuterRadius-fUnitCircleInnerRadius)/2.0 ;
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awt::Point aRet( this->transformSceneToScreenPosition(
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m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ+0.5 ) ) );
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if(3==m_nDimensionCount && nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
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{
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//check whether the upper or the downer edge is more distant from the center
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//take the farest point to put the label to
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awt::Point aP0( this->transformSceneToScreenPosition(
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m_pPosHelper->transformUnitCircleToScene( 0, 0, fLogicZ ) ) );
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awt::Point aP1(aRet);
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awt::Point aP2( this->transformSceneToScreenPosition(
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m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ-0.5 ) ) );
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::basegfx::B2DVector aV0( aP0.X, aP0.Y );
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::basegfx::B2DVector aV1( aP1.X, aP1.Y );
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::basegfx::B2DVector aV2( aP2.X, aP2.Y );
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double fL1 = ::basegfx::B2DVector(aV1-aV0).getLength();
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double fL2 = ::basegfx::B2DVector(aV2-aV0).getLength();
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if(fL2>fL1)
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aRet = aP2;
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//calculate new angle for alignment
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double fDX = aRet.X-aP0.X;
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double fDY = aRet.Y-aP0.Y;
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fDY*=-1.0;//drawing layer has inverse y values
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if( fDX != 0.0 )
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{
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fAngleDegree = atan(fDY/fDX)*180.0/F_PI;
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if(fDX<0.0)
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fAngleDegree+=180.0;
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}
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else
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{
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if(fDY>0.0)
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fAngleDegree = 90.0;
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else
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fAngleDegree = 270.0;
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}
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}
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//set LabelAlignment
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if( !bCenter )
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{
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while(fAngleDegree>360.0)
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fAngleDegree-=360.0;
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while(fAngleDegree<0.0)
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fAngleDegree+=360.0;
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bool bOutside = nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE;
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if(fAngleDegree==0.0)
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rAlignment = LABEL_ALIGN_CENTER;
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else if(fAngleDegree<=22.5)
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rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
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else if(fAngleDegree<67.5)
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rAlignment = bOutside ? LABEL_ALIGN_RIGHT_TOP : LABEL_ALIGN_LEFT_BOTTOM;
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else if(fAngleDegree<112.5)
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rAlignment = bOutside ? LABEL_ALIGN_TOP : LABEL_ALIGN_BOTTOM;
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else if(fAngleDegree<=157.5)
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rAlignment = bOutside ? LABEL_ALIGN_LEFT_TOP : LABEL_ALIGN_RIGHT_BOTTOM;
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else if(fAngleDegree<=202.5)
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rAlignment = bOutside ? LABEL_ALIGN_LEFT : LABEL_ALIGN_RIGHT;
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else if(fAngleDegree<247.5)
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rAlignment = bOutside ? LABEL_ALIGN_LEFT_BOTTOM : LABEL_ALIGN_RIGHT_TOP;
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else if(fAngleDegree<292.5)
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rAlignment = bOutside ? LABEL_ALIGN_BOTTOM : LABEL_ALIGN_TOP;
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else if(fAngleDegree<337.5)
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rAlignment = bOutside ? LABEL_ALIGN_RIGHT_BOTTOM : LABEL_ALIGN_LEFT_TOP;
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else
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rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
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}
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else
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{
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rAlignment = LABEL_ALIGN_CENTER;
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}
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//add a scaling independent Offset if requested
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if( nScreenValueOffsetInRadiusDirection != 0)
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{
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awt::Point aOrigin( this->transformSceneToScreenPosition(
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m_pPosHelper->transformUnitCircleToScene( 0.0, 0.0, fLogicZ+0.5 ) ) );
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basegfx::B2IVector aDirection( aRet.X- aOrigin.X, aRet.Y- aOrigin.Y );
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aDirection.setLength(nScreenValueOffsetInRadiusDirection);
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aRet.X += aDirection.getX();
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aRet.Y += aDirection.getY();
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}
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return aRet;
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}
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} //namespace chart
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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