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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 <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: */
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