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 // ----------------------------------------------------------------------------
  14 // wxRegion
  15 // ----------------------------------------------------------------------------
  16
  17 class WXDLLIMPEXP_CORE wxRegion : public wxRegionBase
  18 {
  19 public:
  20     wxRegion() { }
  21
  22     wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
  23     {
  24         InitRect(x, y, w, h);
  25     }
  26
  27     wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
  28     {
  29         InitRect(topLeft.x, topLeft.y,
  30                  bottomRight.x - topLeft.x, bottomRight.y - topLeft.y);
  31     }
  32
  33     wxRegion( const wxRect& rect )
  34     {
  35         InitRect(rect.x, rect.y, rect.width, rect.height);
  36     }
  37
  38     wxRegion( size_t n, const wxPoint *points, int fillStyle = wxODDEVEN_RULE );
  39
  40     wxRegion( const wxBitmap& bmp)
  41     {
  42         Union(bmp);
  43     }
  44     wxRegion( const wxBitmap& bmp,
  45               const wxColour& transColour, int tolerance = 0)
  46     {
  47         Union(bmp, transColour, tolerance);
  48     }
  49
  50     virtual ~wxRegion();
  51
  52     // wxRegionBase methods
  53     virtual void Clear();
  54     virtual bool IsEmpty() const;
  55
  56 public:
  57     // Init with GdkRegion, set ref count to 2 so that
  58     // the C++ class will not destroy the region!
  59     wxRegion( GdkRegion *region );
  60
  61     GdkRegion *GetRegion() const;
  62
  63 protected:
  64     // ref counting code
  65     virtual wxObjectRefData *CreateRefData() const;
  66     virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
  67
  68     // wxRegionBase pure virtuals
  69     virtual bool DoIsEqual(const wxRegion& region) const;
  70     virtual bool DoGetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const;
  71     virtual wxRegionContain DoContainsPoint(wxCoord x, wxCoord y) const;
  72     virtual wxRegionContain DoContainsRect(const wxRect& rect) const;
  73
  74     virtual bool DoOffset(wxCoord x, wxCoord y);
  75     virtual bool DoUnionWithRect(const wxRect& rect);
  76     virtual bool DoUnionWithRegion(const wxRegion& region);
  77     virtual bool DoIntersect(const wxRegion& region);
  78     virtual bool DoSubtract(const wxRegion& region);
  79     virtual bool DoXor(const wxRegion& region);
  80
  81     // common part of ctors for a rectangle region
  82     void InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
  83
  84 private:
  85     DECLARE_DYNAMIC_CLASS(wxRegion)
  86 };
  87
  88 // ----------------------------------------------------------------------------
  89 // wxRegionIterator: decomposes a region into rectangles
  90 // ----------------------------------------------------------------------------
  91
  92 class WXDLLIMPEXP_CORE wxRegionIterator: public wxObject
  93 {
  94 public:
  95     wxRegionIterator();
  96     wxRegionIterator(const wxRegion& region);
  97     ~wxRegionIterator();
  98
  99     void Reset() { m_current = 0u; }
 100     void Reset(const wxRegion& region);
 101
 102     bool HaveRects() const;
 103     operator bool () const { return HaveRects(); }
 104
 105     wxRegionIterator& operator ++ ();
 106     wxRegionIterator operator ++ (int);
 107
 108     wxCoord GetX() const;
 109     wxCoord GetY() const;
 110     wxCoord GetW() const;
 111     wxCoord GetWidth() const { return GetW(); }
 112     wxCoord GetH() const;
 113     wxCoord GetHeight() const { return GetH(); }
 114     wxRect GetRect() const;
 115
 116 private:
 117     void Init();
 118     void CreateRects( const wxRegion& r );
 119
 120     size_t   m_current;
 121     wxRegion m_region;
 122
 123     wxRect *m_rects;
 124     size_t  m_numRects;
 125
 126 private:
 127     DECLARE_DYNAMIC_CLASS(wxRegionIterator)
 128 };
 129
 130
 131 #endif
 132         // _WX_GTK_REGION_H_