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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: */