canvas/source/tools/surfacerect.hxx

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  27
  28 #ifndef INCLUDED_CANVAS_SURFACERECT_HXX
  29 #define INCLUDED_CANVAS_SURFACERECT_HXX
  30
  31 #include <basegfx/point/b2ipoint.hxx>
  32 #include <basegfx/vector/b2isize.hxx>
  33
  34 namespace canvas
  35 {
  36     //////////////////////////////////////////////////////////////////////////////////
  37     // SurfaceRect
  38     //////////////////////////////////////////////////////////////////////////////////
  39
  40     struct SurfaceRect
  41     {
  42         ::basegfx::B2IPoint maPos;
  43         ::basegfx::B2ISize  maSize;
  44         ::basegfx::B2IPoint maBackup;
  45         bool                bEnabled;
  46
  47         explicit SurfaceRect( const ::basegfx::B2ISize &rSize ) :
  48             maPos(),
  49             maSize(rSize),
  50             maBackup(),
  51             bEnabled(true)
  52         {
  53         }
  54
  55         // coordinates contained in this rectangle are
  56         // constrained to the following rules:
  57         // 1) p.x >= pos.x
  58         // 2) p.x <= pos.x+size.x
  59         // 3) p.y >= pos.y
  60         // 4) p.y <= pos.y+size.y
  61         // in other words, 'size' means the number of pixels
  62         // this rectangle encloses plus one. for example with pos[0,0]
  63         // and size[512,512], p[512,512] would return inside.
  64         // a size of [0,0] therefore denotes a one-by-one rectangle.
  65         bool pointInside( sal_Int32 px, sal_Int32 py ) const
  66         {
  67             const sal_Int32 x1(maPos.getX());
  68             const sal_Int32 y1(maPos.getY());
  69             const sal_Int32 x2(maPos.getX()+maSize.getX());
  70             const sal_Int32 y2(maPos.getY()+maSize.getY());
  71             if(px  < x1) return false;
  72             if(px >= x2) return false;
  73             if(py  < y1) return false;
  74             if(py >= y2) return false;
  75             return true;
  76         }
  77
  78         // returns true if the horizontal line intersects the rect.
  79         bool hLineIntersect( sal_Int32 lx1, sal_Int32 lx2, sal_Int32 ly ) const
  80         {
  81             const sal_Int32 x1(maPos.getX());
  82             const sal_Int32 y1(maPos.getY());
  83             const sal_Int32 x2(maPos.getX()+maSize.getX());
  84             const sal_Int32 y2(maPos.getY()+maSize.getY());
  85             if(ly < y1) return false;
  86             if(ly >= y2) return false;
  87             if((lx1 < x1) && (lx2 < x1)) return false;
  88             if((lx1 >= x2) && (lx2 >= x2)) return false;
  89             return true;
  90         }
  91
  92         //! Returns true if the vertical line intersects the rect.
  93         bool vLineIntersect( sal_Int32 lx, sal_Int32 ly1, sal_Int32 ly2 ) const
  94         {
  95             const sal_Int32 x1(maPos.getX());
  96             const sal_Int32 y1(maPos.getY());
  97             const sal_Int32 x2(maPos.getX()+maSize.getX());
  98             const sal_Int32 y2(maPos.getY()+maSize.getY());
  99             if(lx < x1) return false;
 100             if(lx >= x2) return false;
 101             if((ly1 < y1) && (ly2 < y1)) return false;
 102             if((ly1 >= y2) && (ly2 >= y2)) return false;
 103             return true;
 104         }
 105
 106         // returns true if the passed rect intersects this one.
 107         bool intersection( const SurfaceRect& r ) const
 108         {
 109             const sal_Int32 x1(maPos.getX());
 110             const sal_Int32 y1(maPos.getY());
 111             const sal_Int32 x2(maPos.getX()+maSize.getX());
 112             const sal_Int32 y2(maPos.getY()+maSize.getY());
 113             if(r.hLineIntersect(x1,x2,y1)) return true;
 114             if(r.hLineIntersect(x1,x2,y2)) return true;
 115             if(r.vLineIntersect(x1,y1,y2)) return true;
 116             if(r.vLineIntersect(x2,y1,y2)) return true;
 117             return false;
 118         }
 119
 120         bool inside( const SurfaceRect& r ) const
 121         {
 122             const sal_Int32 x1(maPos.getX());
 123             const sal_Int32 y1(maPos.getY());
 124             const sal_Int32 x2(maPos.getX()+maSize.getX());
 125             const sal_Int32 y2(maPos.getY()+maSize.getY());
 126             if(!(r.pointInside(x1,y1))) return false;
 127             if(!(r.pointInside(x2,y1))) return false;
 128             if(!(r.pointInside(x2,y2))) return false;
 129             if(!(r.pointInside(x1,y2))) return false;
 130             return true;
 131         }
 132     };
 133 }
 134
 135 #endif