include/drawinglayer/primitive2d/helplineprimitive2d.hxx

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  19
  20 #ifndef INCLUDED_DRAWINGLAYER_PRIMITIVE2D_HELPLINEPRIMITIVE2D_HXX
  21 #define INCLUDED_DRAWINGLAYER_PRIMITIVE2D_HELPLINEPRIMITIVE2D_HXX
  22
  23 #include <drawinglayer/drawinglayerdllapi.h>
  24
  25 #include <drawinglayer/primitive2d/baseprimitive2d.hxx>
  26 #include <basegfx/color/bcolor.hxx>
  27 #include <basegfx/matrix/b2dhommatrix.hxx>
  28
  29
  30 // HelplinePrimitive2D class
  31
  32 namespace drawinglayer
  33 {
  34     namespace primitive2d
  35     {
  36         /** HelplineStyle2D definition
  37
  38             The available styles of Helplines
  39         */
  40         enum class HelplineStyle2D
  41         {
  42             Point,
  43             Line
  44         };
  45
  46         /** HelplinePrimitive2D class
  47
  48             This primitive provides a view-dependent helpline definition. The Helpline
  49             is defined by a line equation (Point and vector) and a style. When the style
  50             is a line, dependent from Viewport the visible part of that Helpline is
  51             constructed. For Point, a cross is constructed. This primitive is highly
  52             view-dependent.
  53
  54             The visualisation uses the two given colors to create a dashed line with
  55             the given dash length.
  56          */
  57         class DRAWINGLAYER_DLLPUBLIC HelplinePrimitive2D : public BufferedDecompositionPrimitive2D
  58         {
  59         private:
  60             /// Helpline geometry definition
  61             basegfx::B2DPoint                               maPosition;
  62             basegfx::B2DVector                              maDirection;
  63             HelplineStyle2D                                 meStyle;
  64
  65             /// Helpline style definition
  66             basegfx::BColor                                 maRGBColA;
  67             basegfx::BColor                                 maRGBColB;
  68             double                                          mfDiscreteDashLength;
  69
  70             /** the last used object to view transformtion and the last Viewport,
  71                 used from getDecomposition for decide buffering
  72              */
  73             basegfx::B2DHomMatrix                           maLastObjectToViewTransformation;
  74             basegfx::B2DRange                               maLastViewport;
  75
  76         protected:
  77             /// create local decomposition
  78             virtual void create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const override;
  79
  80         public:
  81             /// constructor
  82             HelplinePrimitive2D(
  83                 const basegfx::B2DPoint& rPosition,
  84                 const basegfx::B2DVector& rDirection,
  85                 HelplineStyle2D eStyle,
  86                 const basegfx::BColor& rRGBColA,
  87                 const basegfx::BColor& aRGBColB,
  88                 double fDiscreteDashLength);
  89
  90             /// data read access
  91             const basegfx::B2DPoint& getPosition() const { return maPosition; }
  92             const basegfx::B2DVector& getDirection() const { return maDirection; }
  93             HelplineStyle2D getStyle() const { return meStyle; }
  94             const basegfx::BColor& getRGBColA() const { return maRGBColA; }
  95             const basegfx::BColor& getRGBColB() const { return maRGBColB; }
  96             double getDiscreteDashLength() const { return mfDiscreteDashLength; }
  97
  98             /// compare operator
  99             virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
 100
 101             /// provide unique ID
 102             DeclPrimitive2DIDBlock()
 103
 104             /// Override standard getDecomposition to be view-dependent here
 105             virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;
 106         };
 107     } // end of namespace primitive2d
 108 } // end of namespace drawinglayer
 109
 110
 111 #endif //INCLUDED_DRAWINGLAYER_PRIMITIVE2D_HELPLINEPRIMITIVE2D_HXX
 112
 113 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */