include/wx/gtk/region.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gtk/region.h
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #ifndef _WX_GTK_REGION_H_
  10 #define _WX_GTK_REGION_H_
  11
  12 #ifdef __WXGTK3__
  13 typedef struct _cairo_region cairo_region_t;
  14 #endif
  15
  16 // ----------------------------------------------------------------------------
  17 // wxRegion
  18 // ----------------------------------------------------------------------------
  19
  20 class WXDLLIMPEXP_CORE wxRegion : public wxRegionBase
  21 {
  22 public:
  23     wxRegion() { }
  24
  25     wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
  26     {
  27         InitRect(x, y, w, h);
  28     }
  29
  30     wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
  31     {
  32         InitRect(topLeft.x, topLeft.y,
  33                  bottomRight.x - topLeft.x, bottomRight.y - topLeft.y);
  34     }
  35
  36     wxRegion( const wxRect& rect )
  37     {
  38         InitRect(rect.x, rect.y, rect.width, rect.height);
  39     }
  40
  41     wxRegion( size_t n, const wxPoint *points,
  42               wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
  43
  44 #if wxUSE_IMAGE
  45     wxRegion( const wxBitmap& bmp)
  46     {
  47         Union(bmp);
  48     }
  49     wxRegion( const wxBitmap& bmp,
  50               const wxColour& transColour, int tolerance = 0)
  51     {
  52         Union(bmp, transColour, tolerance);
  53     }
  54 #endif // wxUSE_IMAGE
  55
  56     virtual ~wxRegion();
  57
  58     // wxRegionBase methods
  59     virtual void Clear();
  60     virtual bool IsEmpty() const;
  61
  62 #ifdef __WXGTK3__
  63     cairo_region_t* GetRegion() const;
  64 #else
  65     wxRegion(const GdkRegion* region);
  66     GdkRegion *GetRegion() const;
  67 #endif
  68
  69 protected:
  70     virtual wxGDIRefData *CreateGDIRefData() const;
  71     virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
  72
  73     // wxRegionBase pure virtuals
  74     virtual bool DoIsEqual(const wxRegion& region) const;
  75     virtual bool DoGetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const;
  76     virtual wxRegionContain DoContainsPoint(wxCoord x, wxCoord y) const;
  77     virtual wxRegionContain DoContainsRect(const wxRect& rect) const;
  78
  79     virtual bool DoOffset(wxCoord x, wxCoord y);
  80     virtual bool DoUnionWithRect(const wxRect& rect);
  81     virtual bool DoUnionWithRegion(const wxRegion& region);
  82     virtual bool DoIntersect(const wxRegion& region);
  83     virtual bool DoSubtract(const wxRegion& region);
  84     virtual bool DoXor(const wxRegion& region);
  85
  86     // common part of ctors for a rectangle region
  87     void InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
  88
  89 private:
  90     DECLARE_DYNAMIC_CLASS(wxRegion)
  91 };
  92
  93 // ----------------------------------------------------------------------------
  94 // wxRegionIterator: decomposes a region into rectangles
  95 // ----------------------------------------------------------------------------
  96
  97 class WXDLLIMPEXP_CORE wxRegionIterator: public wxObject
  98 {
  99 public:
 100     wxRegionIterator();
 101     wxRegionIterator(const wxRegion& region);
 102     wxRegionIterator(const wxRegionIterator& ri) : wxObject(ri) { Init(); *this = ri; }
 103     ~wxRegionIterator();
 104
 105     wxRegionIterator& operator=(const wxRegionIterator& ri);
 106
 107     void Reset() { m_current = 0u; }
 108     void Reset(const wxRegion& region);
 109
 110     bool HaveRects() const;
 111     operator bool () const { return HaveRects(); }
 112
 113     wxRegionIterator& operator ++ ();
 114     wxRegionIterator operator ++ (int);
 115
 116     wxCoord GetX() const;
 117     wxCoord GetY() const;
 118     wxCoord GetW() const;
 119     wxCoord GetWidth() const { return GetW(); }
 120     wxCoord GetH() const;
 121     wxCoord GetHeight() const { return GetH(); }
 122     wxRect GetRect() const;
 123
 124 private:
 125     void Init();
 126     void CreateRects( const wxRegion& r );
 127
 128     wxRegion m_region;
 129     wxRect *m_rects;
 130     int m_numRects;
 131     int m_current;
 132
 133     DECLARE_DYNAMIC_CLASS(wxRegionIterator)
 134 };
 135
 136
 137 #endif
 138         // _WX_GTK_REGION_H_