drawinglayer/source/primitive2d/primitivetools2d.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  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
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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/primitivetools2d.hxx>
  21 #include <basegfx/vector/b2dvector.hxx>
  22 #include <drawinglayer/geometry/viewinformation2d.hxx>
  23
  24
  25 namespace drawinglayer::primitive2d
  26 {
  27         void DiscreteMetricDependentPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
  28         {
  29             // get the current DiscreteUnit, look at X and Y and use the maximum
  30             const basegfx::B2DVector aDiscreteVector(rViewInformation.getInverseObjectToViewTransformation() * basegfx::B2DVector(1.0, 1.0));
  31             const double fDiscreteUnit(std::min(fabs(aDiscreteVector.getX()), fabs(aDiscreteVector.getY())));
  32
  33             if(!getBuffered2DDecomposition().empty() && !basegfx::fTools::equal(fDiscreteUnit, getDiscreteUnit()))
  34             {
  35                 // conditions of last local decomposition have changed, delete
  36                 const_cast< DiscreteMetricDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
  37             }
  38
  39             if(getBuffered2DDecomposition().empty())
  40             {
  41                 // remember new valid DiscreteUnit
  42                 const_cast< DiscreteMetricDependentPrimitive2D* >(this)->mfDiscreteUnit = fDiscreteUnit;
  43             }
  44
  45             // call base implementation
  46             BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
  47         }
  48
  49
  50
  51
  52         void ViewportDependentPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
  53         {
  54             // get the current Viewport
  55             const basegfx::B2DRange& rViewport = rViewInformation.getViewport();
  56
  57             if(!getBuffered2DDecomposition().empty() && !rViewport.equal(getViewport()))
  58             {
  59                 // conditions of last local decomposition have changed, delete
  60                 const_cast< ViewportDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
  61             }
  62
  63             if(getBuffered2DDecomposition().empty())
  64             {
  65                 // remember new valid DiscreteUnit
  66                 const_cast< ViewportDependentPrimitive2D* >(this)->maViewport = rViewport;
  67             }
  68
  69             // call base implementation
  70             BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
  71         }
  72
  73         void ViewTransformationDependentPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
  74         {
  75             // get the current ViewTransformation
  76             const basegfx::B2DHomMatrix& rViewTransformation = rViewInformation.getViewTransformation();
  77
  78             if(!getBuffered2DDecomposition().empty() && rViewTransformation != getViewTransformation())
  79             {
  80                 // conditions of last local decomposition have changed, delete
  81                 const_cast< ViewTransformationDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
  82             }
  83
  84             if(getBuffered2DDecomposition().empty())
  85             {
  86                 // remember new valid ViewTransformation
  87                 const_cast< ViewTransformationDependentPrimitive2D* >(this)->maViewTransformation = rViewTransformation;
  88             }
  89
  90             // call base implementation
  91             BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
  92         }
  93
  94         void ObjectAndViewTransformationDependentPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
  95         {
  96             // get the current ViewTransformation
  97             const basegfx::B2DHomMatrix& rViewTransformation = rViewInformation.getViewTransformation();
  98
  99             if(!getBuffered2DDecomposition().empty() && rViewTransformation != getViewTransformation())
 100             {
 101                 // conditions of last local decomposition have changed, delete
 102                 const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
 103             }
 104
 105             // get the current ObjectTransformation
 106             const basegfx::B2DHomMatrix& rObjectTransformation = rViewInformation.getObjectTransformation();
 107
 108             if(!getBuffered2DDecomposition().empty() && rObjectTransformation != getObjectTransformation())
 109             {
 110                 // conditions of last local decomposition have changed, delete
 111                 const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
 112             }
 113
 114             if(getBuffered2DDecomposition().empty())
 115             {
 116                 // remember new valid ViewTransformation, and ObjectTransformation
 117                 const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->maViewTransformation = rViewTransformation;
 118                 const_cast< ObjectAndViewTransformationDependentPrimitive2D* >(this)->maObjectTransformation = rObjectTransformation;
 119             }
 120
 121             // call base implementation
 122             BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
 123         }
 124
 125 } // end of namespace
 126
 127 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */