canvas/source/tools/surfacerect.hxx

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  30
  31 #ifndef INCLUDED_CANVAS_SURFACERECT_HXX
  32 #define INCLUDED_CANVAS_SURFACERECT_HXX
  33
  34 #include <basegfx/point/b2ipoint.hxx>
  35 #include <basegfx/vector/b2isize.hxx>
  36
  37 namespace canvas
  38 {
  39     //////////////////////////////////////////////////////////////////////////////////
  40     // SurfaceRect
  41     //////////////////////////////////////////////////////////////////////////////////
  42
  43     struct SurfaceRect
  44     {
  45         ::basegfx::B2IPoint maPos;
  46         ::basegfx::B2ISize  maSize;
  47         ::basegfx::B2IPoint maBackup;
  48         bool                bEnabled;
  49
  50         explicit SurfaceRect( const ::basegfx::B2ISize &rSize ) :
  51             maPos(),
  52             maSize(rSize),
  53             maBackup(),
  54             bEnabled(true)
  55         {
  56         }
  57
  58         // coordinates contained in this rectangle are
  59         // constrained to the following rules:
  60         // 1) p.x >= pos.x
  61         // 2) p.x <= pos.x+size.x
  62         // 3) p.y >= pos.y
  63         // 4) p.y <= pos.y+size.y
  64         // in other words, 'size' means the number of pixels
  65         // this rectangle encloses plus one. for example with pos[0,0]
  66         // and size[512,512], p[512,512] would return inside.
  67         // a size of [0,0] therefore denotes a one-by-one rectangle.
  68         bool pointInside( sal_Int32 px, sal_Int32 py ) const
  69         {
  70             const sal_Int32 x1(maPos.getX());
  71             const sal_Int32 y1(maPos.getY());
  72             const sal_Int32 x2(maPos.getX()+maSize.getX());
  73             const sal_Int32 y2(maPos.getY()+maSize.getY());
  74             if(px  < x1) return false;
  75             if(px >= x2) return false;
  76             if(py  < y1) return false;
  77             if(py >= y2) return false;
  78             return true;
  79         }
  80
  81         // returns true if the horizontal line intersects the rect.
  82         bool hLineIntersect( sal_Int32 lx1, sal_Int32 lx2, sal_Int32 ly ) const
  83         {
  84             const sal_Int32 x1(maPos.getX());
  85             const sal_Int32 y1(maPos.getY());
  86             const sal_Int32 x2(maPos.getX()+maSize.getX());
  87             const sal_Int32 y2(maPos.getY()+maSize.getY());
  88             if(ly < y1) return false;
  89             if(ly >= y2) return false;
  90             if((lx1 < x1) && (lx2 < x1)) return false;
  91             if((lx1 >= x2) && (lx2 >= x2)) return false;
  92             return true;
  93         }
  94
  95         //! Returns true if the vertical line intersects the rect.
  96         bool vLineIntersect( sal_Int32 lx, sal_Int32 ly1, sal_Int32 ly2 ) const
  97         {
  98             const sal_Int32 x1(maPos.getX());
  99             const sal_Int32 y1(maPos.getY());
 100             const sal_Int32 x2(maPos.getX()+maSize.getX());
 101             const sal_Int32 y2(maPos.getY()+maSize.getY());
 102             if(lx < x1) return false;
 103             if(lx >= x2) return false;
 104             if((ly1 < y1) && (ly2 < y1)) return false;
 105             if((ly1 >= y2) && (ly2 >= y2)) return false;
 106             return true;
 107         }
 108
 109         // returns true if the passed rect intersects this one.
 110         bool intersection( const SurfaceRect& r ) const
 111         {
 112             const sal_Int32 x1(maPos.getX());
 113             const sal_Int32 y1(maPos.getY());
 114             const sal_Int32 x2(maPos.getX()+maSize.getX());
 115             const sal_Int32 y2(maPos.getY()+maSize.getY());
 116             if(r.hLineIntersect(x1,x2,y1)) return true;
 117             if(r.hLineIntersect(x1,x2,y2)) return true;
 118             if(r.vLineIntersect(x1,y1,y2)) return true;
 119             if(r.vLineIntersect(x2,y1,y2)) return true;
 120             return false;
 121         }
 122
 123         bool inside( const SurfaceRect& r ) const
 124         {
 125             const sal_Int32 x1(maPos.getX());
 126             const sal_Int32 y1(maPos.getY());
 127             const sal_Int32 x2(maPos.getX()+maSize.getX());
 128             const sal_Int32 y2(maPos.getY()+maSize.getY());
 129             if(!(r.pointInside(x1,y1))) return false;
 130             if(!(r.pointInside(x2,y1))) return false;
 131             if(!(r.pointInside(x2,y2))) return false;
 132             if(!(r.pointInside(x1,y2))) return false;
 133             return true;
 134         }
 135     };
 136 }
 137
 138 #endif