chart2/source/view/main/PolarLabelPositionHelper.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_chart2.hxx"
  33
  34 #include "PolarLabelPositionHelper.hxx"
  35 #include "PlottingPositionHelper.hxx"
  36 #include "CommonConverters.hxx"
  37 #include <basegfx/vector/b2dvector.hxx>
  38 #include <basegfx/vector/b2ivector.hxx>
  39
  40 #include <com/sun/star/chart/DataLabelPlacement.hpp>
  41
  42 //.............................................................................
  43 namespace chart
  44 {
  45 //.............................................................................
  46 using namespace ::com::sun::star;
  47 using namespace ::com::sun::star::chart2;
  48
  49 PolarLabelPositionHelper::PolarLabelPositionHelper(
  50                     PolarPlottingPositionHelper* pPosHelper
  51                     , sal_Int32 nDimensionCount
  52                     , const uno::Reference< drawing::XShapes >& xLogicTarget
  53                     , ShapeFactory* pShapeFactory )
  54                     : LabelPositionHelper( pPosHelper, nDimensionCount, xLogicTarget, pShapeFactory )
  55                     , m_pPosHelper(pPosHelper)
  56 {
  57 }
  58
  59 PolarLabelPositionHelper::~PolarLabelPositionHelper()
  60 {
  61 }
  62
  63 awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForLogicValues(
  64         LabelAlignment& rAlignment
  65         , double fLogicValueOnAngleAxis
  66         , double fLogicValueOnRadiusAxis
  67         , double fLogicZ
  68         , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
  69 {
  70     double fUnitCircleAngleDegree = m_pPosHelper->transformToAngleDegree( fLogicValueOnAngleAxis );
  71     double fUnitCircleRadius = m_pPosHelper->transformToRadius( fLogicValueOnRadiusAxis );
  72
  73     return getLabelScreenPositionAndAlignmentForUnitCircleValues(
  74            rAlignment, ::com::sun::star::chart::DataLabelPlacement::OUTSIDE
  75            , fUnitCircleAngleDegree, 0.0
  76            , fUnitCircleRadius, fUnitCircleRadius, fLogicZ, nScreenValueOffsetInRadiusDirection );
  77 }
  78
  79 awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForUnitCircleValues(
  80         LabelAlignment& rAlignment, sal_Int32 nLabelPlacement
  81         , double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree
  82         , double fUnitCircleInnerRadius, double fUnitCircleOuterRadius
  83         , double fLogicZ
  84         , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
  85 {
  86     bool bCenter = (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
  87                 && (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::INSIDE);
  88
  89     double fAngleDegree = fUnitCircleStartAngleDegree + fUnitCircleWidthAngleDegree/2.0;
  90     double fRadius = 0.0;
  91     if( !bCenter ) //e.g. for pure pie chart(one ring only) or for angle axis of polyar coordinate system
  92         fRadius = fUnitCircleOuterRadius;
  93     else
  94         fRadius = fUnitCircleInnerRadius + (fUnitCircleOuterRadius-fUnitCircleInnerRadius)/2.0 ;
  95
  96     awt::Point aRet( this->transformSceneToScreenPosition(
  97         m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ+0.5 ) ) );
  98
  99     if(3==m_nDimensionCount && nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
 100     {
 101         //check wether the upper or the downer edge is more distant from the center
 102         //take the farest point to put the label to
 103
 104         awt::Point aP0( this->transformSceneToScreenPosition(
 105             m_pPosHelper->transformUnitCircleToScene( 0, 0, fLogicZ ) ) );
 106         awt::Point aP1(aRet);
 107         awt::Point aP2( this->transformSceneToScreenPosition(
 108             m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ-0.5 ) ) );
 109
 110         ::basegfx::B2DVector aV0( aP0.X, aP0.Y );
 111         ::basegfx::B2DVector aV1( aP1.X, aP1.Y );
 112         ::basegfx::B2DVector aV2( aP2.X, aP2.Y );
 113
 114         double fL1 = ::basegfx::B2DVector(aV1-aV0).getLength();
 115         double fL2 = ::basegfx::B2DVector(aV2-aV0).getLength();
 116
 117         if(fL2>fL1)
 118             aRet = aP2;
 119
 120         //calculate new angle for alignment
 121         double fDX = aRet.X-aP0.X;
 122         double fDY = aRet.Y-aP0.Y;
 123         fDY*=-1.0;//drawing layer has inverse y values
 124         if( fDX != 0.0 )
 125         {
 126             fAngleDegree = atan(fDY/fDX)*180.0/F_PI;
 127             if(fDX<0.0)
 128                 fAngleDegree+=180.0;
 129         }
 130         else
 131         {
 132             if(fDY>0.0)
 133                 fAngleDegree = 90.0;
 134             else
 135                 fAngleDegree = 270.0;
 136         }
 137     }
 138     //------------------------------
 139     //set LabelAlignment
 140     if( !bCenter )
 141     {
 142         while(fAngleDegree>360.0)
 143             fAngleDegree-=360.0;
 144         while(fAngleDegree<0.0)
 145             fAngleDegree+=360.0;
 146
 147         bool bOutside = nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE;
 148
 149         if(fAngleDegree==0.0)
 150             rAlignment = LABEL_ALIGN_CENTER;
 151         else if(fAngleDegree<=22.5)
 152             rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
 153         else if(fAngleDegree<67.5)
 154             rAlignment = bOutside ? LABEL_ALIGN_RIGHT_TOP : LABEL_ALIGN_LEFT_BOTTOM;
 155         else if(fAngleDegree<112.5)
 156             rAlignment = bOutside ? LABEL_ALIGN_TOP : LABEL_ALIGN_BOTTOM;
 157         else if(fAngleDegree<=157.5)
 158             rAlignment = bOutside ? LABEL_ALIGN_LEFT_TOP : LABEL_ALIGN_RIGHT_BOTTOM;
 159         else if(fAngleDegree<=202.5)
 160             rAlignment = bOutside ? LABEL_ALIGN_LEFT : LABEL_ALIGN_RIGHT;
 161         else if(fAngleDegree<247.5)
 162             rAlignment = bOutside ? LABEL_ALIGN_LEFT_BOTTOM : LABEL_ALIGN_RIGHT_TOP;
 163         else if(fAngleDegree<292.5)
 164             rAlignment = bOutside ? LABEL_ALIGN_BOTTOM : LABEL_ALIGN_TOP;
 165         else if(fAngleDegree<337.5)
 166             rAlignment = bOutside ? LABEL_ALIGN_RIGHT_BOTTOM : LABEL_ALIGN_LEFT_TOP;
 167         else
 168             rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
 169     }
 170     else
 171     {
 172         rAlignment = LABEL_ALIGN_CENTER;
 173     }
 174
 175     //add a scaling independent Offset if requested
 176     if( nScreenValueOffsetInRadiusDirection != 0)
 177     {
 178         awt::Point aOrigin( this->transformSceneToScreenPosition(
 179             m_pPosHelper->transformUnitCircleToScene( 0.0, 0.0, fLogicZ+0.5 ) ) );
 180         basegfx::B2IVector aDirection( aRet.X- aOrigin.X, aRet.Y- aOrigin.Y );
 181         aDirection.setLength(nScreenValueOffsetInRadiusDirection);
 182         aRet.X += aDirection.getX();
 183         aRet.Y += aDirection.getY();
 184     }
 185
 186     return aRet;
 187 }
 188
 189 //.............................................................................
 190 } //namespace chart
 191 //.............................................................................