drawinglayer/source/primitive2d/helplineprimitive2d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   9  * This file incorporates work covered by the following license notice:
  10  *
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  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 <basegfx/utils/canvastools.hxx>
  25 #include <drawinglayer/geometry/viewinformation2d.hxx>
  26 #include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
  27
  28
  29 using namespace com::sun::star;
  30
  31
  32 namespace drawinglayer
  33 {
  34     namespace primitive2d
  35     {
  36         void HelplinePrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const
  37         {
  38             if(!rViewInformation.getViewport().isEmpty() && !getDirection().equalZero())
  39             {
  40                 // position to view coordinates, DashLen and DashLen in logic
  41                 const basegfx::B2DPoint aViewPosition(rViewInformation.getObjectToViewTransformation() * getPosition());
  42
  43                 switch(getStyle())
  44                 {
  45                     default : // HelplineStyle2D::Point
  46                     {
  47                         const double fViewFixValue(15.0);
  48                         basegfx::B2DVector aNormalizedDirection(getDirection());
  49                         aNormalizedDirection.normalize();
  50                         aNormalizedDirection *= fViewFixValue;
  51                         const basegfx::B2DPoint aStartA(aViewPosition - aNormalizedDirection);
  52                         const basegfx::B2DPoint aEndA(aViewPosition + aNormalizedDirection);
  53                         basegfx::B2DPolygon aLineA;
  54                         aLineA.append(aStartA);
  55                         aLineA.append(aEndA);
  56                         aLineA.transform(rViewInformation.getInverseObjectToViewTransformation());
  57                         PolygonMarkerPrimitive2D* pNewA = new PolygonMarkerPrimitive2D(aLineA, getRGBColA(), getRGBColB(), getDiscreteDashLength());
  58                         rContainer.push_back(pNewA);
  59
  60                         const basegfx::B2DVector aPerpendicularNormalizedDirection(basegfx::getPerpendicular(aNormalizedDirection));
  61                         const basegfx::B2DPoint aStartB(aViewPosition - aPerpendicularNormalizedDirection);
  62                         const basegfx::B2DPoint aEndB(aViewPosition + aPerpendicularNormalizedDirection);
  63                         basegfx::B2DPolygon aLineB;
  64                         aLineB.append(aStartB);
  65                         aLineB.append(aEndB);
  66                         aLineB.transform(rViewInformation.getInverseObjectToViewTransformation());
  67                         PolygonMarkerPrimitive2D* pNewB = new PolygonMarkerPrimitive2D(aLineB, getRGBColA(), getRGBColB(), getDiscreteDashLength());
  68                         rContainer.push_back(pNewB);
  69
  70                         break;
  71                     }
  72                     case HelplineStyle2D::Line :
  73                     {
  74                         basegfx::B2DPolygon aLine;
  75
  76                         if(basegfx::areParallel(getDirection(), basegfx::B2DVector(1.0, 0.0)))
  77                         {
  78                             // parallel to X-Axis, get cuts with Y-Axes
  79                             const double fCutA((rViewInformation.getDiscreteViewport().getMinX() - aViewPosition.getX()) / getDirection().getX());
  80                             const double fCutB((rViewInformation.getDiscreteViewport().getMaxX() - aViewPosition.getX()) / getDirection().getX());
  81                             const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
  82                             const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
  83                             const bool bBothLeft(aPosA.getX() < rViewInformation.getDiscreteViewport().getMinX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMinX());
  84                             const bool bBothRight(aPosA.getX() > rViewInformation.getDiscreteViewport().getMaxX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMaxX());
  85
  86                             if(!bBothLeft && !bBothRight)
  87                             {
  88                                 aLine.append(aPosA);
  89                                 aLine.append(aPosB);
  90                             }
  91                         }
  92                         else
  93                         {
  94                             // get cuts with X-Axes
  95                             const double fCutA((rViewInformation.getDiscreteViewport().getMinY() - aViewPosition.getY()) / getDirection().getY());
  96                             const double fCutB((rViewInformation.getDiscreteViewport().getMaxY() - aViewPosition.getY()) / getDirection().getY());
  97                             const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
  98                             const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
  99                             const bool bBothAbove(aPosA.getY() < rViewInformation.getDiscreteViewport().getMinY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMinY());
 100                             const bool bBothBelow(aPosA.getY() > rViewInformation.getDiscreteViewport().getMaxY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMaxY());
 101
 102                             if(!bBothAbove && !bBothBelow)
 103                             {
 104                                 aLine.append(aPosA);
 105                                 aLine.append(aPosB);
 106                             }
 107                         }
 108
 109                         if(aLine.count())
 110                         {
 111                             // clip against visible area
 112                             const basegfx::B2DPolyPolygon aResult(basegfx::utils::clipPolygonOnRange(aLine, rViewInformation.getDiscreteViewport(), true, true));
 113
 114                             for(sal_uInt32 a(0); a < aResult.count(); a++)
 115                             {
 116                                 basegfx::B2DPolygon aPart(aResult.getB2DPolygon(a));
 117                                 aPart.transform(rViewInformation.getInverseObjectToViewTransformation());
 118                                 PolygonMarkerPrimitive2D* pNew = new PolygonMarkerPrimitive2D(aPart, getRGBColA(), getRGBColB(), getDiscreteDashLength());
 119                                 rContainer.push_back(pNew);
 120                             }
 121                         }
 122
 123                         break;
 124                     }
 125                 }
 126             }
 127         }
 128
 129         HelplinePrimitive2D::HelplinePrimitive2D(
 130             const basegfx::B2DPoint& rPosition,
 131             const basegfx::B2DVector& rDirection,
 132             HelplineStyle2D eStyle,
 133             const basegfx::BColor& rRGBColA,
 134             const basegfx::BColor& rRGBColB,
 135             double fDiscreteDashLength)
 136         :   BufferedDecompositionPrimitive2D(),
 137             maPosition(rPosition),
 138             maDirection(rDirection),
 139             meStyle(eStyle),
 140             maRGBColA(rRGBColA),
 141             maRGBColB(rRGBColB),
 142             mfDiscreteDashLength(fDiscreteDashLength),
 143             maLastObjectToViewTransformation(),
 144             maLastViewport()
 145         {
 146         }
 147
 148         bool HelplinePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
 149         {
 150             if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
 151             {
 152                 const HelplinePrimitive2D& rCompare = static_cast<const HelplinePrimitive2D&>(rPrimitive);
 153
 154                 return (getPosition() == rCompare.getPosition()
 155                     && getDirection() == rCompare.getDirection()
 156                     && getStyle() == rCompare.getStyle()
 157                     && getRGBColA() == rCompare.getRGBColA()
 158                     && getRGBColB() == rCompare.getRGBColB()
 159                     && getDiscreteDashLength() == rCompare.getDiscreteDashLength());
 160             }
 161
 162             return false;
 163         }
 164
 165         void HelplinePrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
 166         {
 167             ::osl::MutexGuard aGuard( m_aMutex );
 168
 169             if(!getBuffered2DDecomposition().empty())
 170             {
 171                 if(maLastViewport != rViewInformation.getViewport() || maLastObjectToViewTransformation != rViewInformation.getObjectToViewTransformation())
 172                 {
 173                     // conditions of last local decomposition have changed, delete
 174                     const_cast< HelplinePrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
 175                 }
 176             }
 177
 178             if(getBuffered2DDecomposition().empty())
 179             {
 180                 // remember ViewRange and ViewTransformation
 181                 const_cast< HelplinePrimitive2D* >(this)->maLastObjectToViewTransformation = rViewInformation.getObjectToViewTransformation();
 182                 const_cast< HelplinePrimitive2D* >(this)->maLastViewport = rViewInformation.getViewport();
 183             }
 184
 185             // use parent implementation
 186             BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
 187         }
 188
 189         // provide unique ID
 190         ImplPrimitive2DIDBlock(HelplinePrimitive2D, PRIMITIVE2D_ID_HELPLINEPRIMITIVE2D)
 191
 192     } // end of namespace primitive2d
 193 } // end of namespace drawinglayer
 194
 195 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */