drawinglayer/source/primitive2d/helplineprimitive2d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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  14  *   ownership. The ASF licenses this file to you under the Apache
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  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <drawinglayer/primitive2d/helplineprimitive2d.hxx>
  21 #include <basegfx/polygon/b2dpolygon.hxx>
  22 #include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
  23 #include <basegfx/polygon/b2dpolygonclipper.hxx>
  24 #include <drawinglayer/geometry/viewinformation2d.hxx>
  25 #include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
  26
  27
  28 using namespace com::sun::star;
  29
  30
  31 namespace drawinglayer::primitive2d
  32 {
  33         void HelplinePrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const
  34         {
  35             if(rViewInformation.getViewport().isEmpty() || getDirection().equalZero())
  36                 return;
  37
  38             // position to view coordinates, DashLen and DashLen in logic
  39             const basegfx::B2DPoint aViewPosition(rViewInformation.getObjectToViewTransformation() * getPosition());
  40
  41             switch(getStyle())
  42             {
  43                 default : // HelplineStyle2D::Point
  44                 {
  45                     const double fViewFixValue(15.0);
  46                     basegfx::B2DVector aNormalizedDirection(getDirection());
  47                     aNormalizedDirection.normalize();
  48                     aNormalizedDirection *= fViewFixValue;
  49                     const basegfx::B2DPoint aStartA(aViewPosition - aNormalizedDirection);
  50                     const basegfx::B2DPoint aEndA(aViewPosition + aNormalizedDirection);
  51                     basegfx::B2DPolygon aLineA;
  52                     aLineA.append(aStartA);
  53                     aLineA.append(aEndA);
  54                     aLineA.transform(rViewInformation.getInverseObjectToViewTransformation());
  55                     PolygonMarkerPrimitive2D* pNewA = new PolygonMarkerPrimitive2D(aLineA, getRGBColA(), getRGBColB(), getDiscreteDashLength());
  56                     rContainer.push_back(pNewA);
  57
  58                     const basegfx::B2DVector aPerpendicularNormalizedDirection(basegfx::getPerpendicular(aNormalizedDirection));
  59                     const basegfx::B2DPoint aStartB(aViewPosition - aPerpendicularNormalizedDirection);
  60                     const basegfx::B2DPoint aEndB(aViewPosition + aPerpendicularNormalizedDirection);
  61                     basegfx::B2DPolygon aLineB;
  62                     aLineB.append(aStartB);
  63                     aLineB.append(aEndB);
  64                     aLineB.transform(rViewInformation.getInverseObjectToViewTransformation());
  65                     PolygonMarkerPrimitive2D* pNewB = new PolygonMarkerPrimitive2D(aLineB, getRGBColA(), getRGBColB(), getDiscreteDashLength());
  66                     rContainer.push_back(pNewB);
  67
  68                     break;
  69                 }
  70                 case HelplineStyle2D::Line :
  71                 {
  72                     basegfx::B2DPolygon aLine;
  73
  74                     if(basegfx::areParallel(getDirection(), basegfx::B2DVector(1.0, 0.0)))
  75                     {
  76                         // parallel to X-Axis, get cuts with Y-Axes
  77                         const double fCutA((rViewInformation.getDiscreteViewport().getMinX() - aViewPosition.getX()) / getDirection().getX());
  78                         const double fCutB((rViewInformation.getDiscreteViewport().getMaxX() - aViewPosition.getX()) / getDirection().getX());
  79                         const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
  80                         const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
  81                         const bool bBothLeft(aPosA.getX() < rViewInformation.getDiscreteViewport().getMinX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMinX());
  82                         const bool bBothRight(aPosA.getX() > rViewInformation.getDiscreteViewport().getMaxX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMaxX());
  83
  84                         if(!bBothLeft && !bBothRight)
  85                         {
  86                             aLine.append(aPosA);
  87                             aLine.append(aPosB);
  88                         }
  89                     }
  90                     else
  91                     {
  92                         // get cuts with X-Axes
  93                         const double fCutA((rViewInformation.getDiscreteViewport().getMinY() - aViewPosition.getY()) / getDirection().getY());
  94                         const double fCutB((rViewInformation.getDiscreteViewport().getMaxY() - aViewPosition.getY()) / getDirection().getY());
  95                         const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
  96                         const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
  97                         const bool bBothAbove(aPosA.getY() < rViewInformation.getDiscreteViewport().getMinY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMinY());
  98                         const bool bBothBelow(aPosA.getY() > rViewInformation.getDiscreteViewport().getMaxY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMaxY());
  99
 100                         if(!bBothAbove && !bBothBelow)
 101                         {
 102                             aLine.append(aPosA);
 103                             aLine.append(aPosB);
 104                         }
 105                     }
 106
 107                     if(aLine.count())
 108                     {
 109                         // clip against visible area
 110                         const basegfx::B2DPolyPolygon aResult(basegfx::utils::clipPolygonOnRange(aLine, rViewInformation.getDiscreteViewport(), true, true));
 111
 112                         for(sal_uInt32 a(0); a < aResult.count(); a++)
 113                         {
 114                             basegfx::B2DPolygon aPart(aResult.getB2DPolygon(a));
 115                             aPart.transform(rViewInformation.getInverseObjectToViewTransformation());
 116                             PolygonMarkerPrimitive2D* pNew = new PolygonMarkerPrimitive2D(aPart, getRGBColA(), getRGBColB(), getDiscreteDashLength());
 117                             rContainer.push_back(pNew);
 118                         }
 119                     }
 120
 121                     break;
 122                 }
 123             }
 124         }
 125
 126         HelplinePrimitive2D::HelplinePrimitive2D(
 127             const basegfx::B2DPoint& rPosition,
 128             const basegfx::B2DVector& rDirection,
 129             HelplineStyle2D eStyle,
 130             const basegfx::BColor& rRGBColA,
 131             const basegfx::BColor& rRGBColB,
 132             double fDiscreteDashLength)
 133         :   BufferedDecompositionPrimitive2D(),
 134             maPosition(rPosition),
 135             maDirection(rDirection),
 136             meStyle(eStyle),
 137             maRGBColA(rRGBColA),
 138             maRGBColB(rRGBColB),
 139             mfDiscreteDashLength(fDiscreteDashLength),
 140             maLastObjectToViewTransformation(),
 141             maLastViewport()
 142         {
 143         }
 144
 145         bool HelplinePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
 146         {
 147             if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
 148             {
 149                 const HelplinePrimitive2D& rCompare = static_cast<const HelplinePrimitive2D&>(rPrimitive);
 150
 151                 return (getPosition() == rCompare.getPosition()
 152                     && getDirection() == rCompare.getDirection()
 153                     && getStyle() == rCompare.getStyle()
 154                     && getRGBColA() == rCompare.getRGBColA()
 155                     && getRGBColB() == rCompare.getRGBColB()
 156                     && getDiscreteDashLength() == rCompare.getDiscreteDashLength());
 157             }
 158
 159             return false;
 160         }
 161
 162         void HelplinePrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
 163         {
 164             ::osl::MutexGuard aGuard( m_aMutex );
 165
 166             if(!getBuffered2DDecomposition().empty())
 167             {
 168                 if(maLastViewport != rViewInformation.getViewport() || maLastObjectToViewTransformation != rViewInformation.getObjectToViewTransformation())
 169                 {
 170                     // conditions of last local decomposition have changed, delete
 171                     const_cast< HelplinePrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
 172                 }
 173             }
 174
 175             if(getBuffered2DDecomposition().empty())
 176             {
 177                 // remember ViewRange and ViewTransformation
 178                 const_cast< HelplinePrimitive2D* >(this)->maLastObjectToViewTransformation = rViewInformation.getObjectToViewTransformation();
 179                 const_cast< HelplinePrimitive2D* >(this)->maLastViewport = rViewInformation.getViewport();
 180             }
 181
 182             // use parent implementation
 183             BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
 184         }
 185
 186         // provide unique ID
 187         ImplPrimitive2DIDBlock(HelplinePrimitive2D, PRIMITIVE2D_ID_HELPLINEPRIMITIVE2D)
 188
 189 } // end of namespace
 190
 191 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */