include/wx/gtk/region.h

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