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 #if wxUSE_IMAGE
  41     wxRegion( const wxBitmap& bmp)
  42     {
  43         Union(bmp);
  44     }
  45     wxRegion( const wxBitmap& bmp,
  46               const wxColour& transColour, int tolerance = 0)
  47     {
  48         Union(bmp, transColour, tolerance);
  49     }
  50 #endif // wxUSE_IMAGE
  51
  52     virtual ~wxRegion();
  53
  54     // wxRegionBase methods
  55     virtual void Clear();
  56     virtual bool IsEmpty() const;
  57
  58 public:
  59     // Init with GdkRegion, set ref count to 2 so that
  60     // the C++ class will not destroy the region!
  61     wxRegion( GdkRegion *region );
  62
  63     GdkRegion *GetRegion() const;
  64
  65 protected:
  66     virtual wxGDIRefData *CreateGDIRefData() const;
  67     virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
  68
  69     // wxRegionBase pure virtuals
  70     virtual bool DoIsEqual(const wxRegion& region) const;
  71     virtual bool DoGetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const;
  72     virtual wxRegionContain DoContainsPoint(wxCoord x, wxCoord y) const;
  73     virtual wxRegionContain DoContainsRect(const wxRect& rect) const;
  74
  75     virtual bool DoOffset(wxCoord x, wxCoord y);
  76     virtual bool DoUnionWithRect(const wxRect& rect);
  77     virtual bool DoUnionWithRegion(const wxRegion& region);
  78     virtual bool DoIntersect(const wxRegion& region);
  79     virtual bool DoSubtract(const wxRegion& region);
  80     virtual bool DoXor(const wxRegion& region);
  81
  82     // common part of ctors for a rectangle region
  83     void InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
  84
  85 private:
  86     DECLARE_DYNAMIC_CLASS(wxRegion)
  87 };
  88
  89 // ----------------------------------------------------------------------------
  90 // wxRegionIterator: decomposes a region into rectangles
  91 // ----------------------------------------------------------------------------
  92
  93 class WXDLLIMPEXP_CORE wxRegionIterator: public wxObject
  94 {
  95 public:
  96     wxRegionIterator();
  97     wxRegionIterator(const wxRegion& region);
  98     wxRegionIterator(const wxRegionIterator& ri) : wxObject(ri) { Init(); *this = ri; }
  99     ~wxRegionIterator();
 100
 101     wxRegionIterator& operator=(const wxRegionIterator& ri);
 102
 103     void Reset() { m_current = 0u; }
 104     void Reset(const wxRegion& region);
 105
 106     bool HaveRects() const;
 107     operator bool () const { return HaveRects(); }
 108
 109     wxRegionIterator& operator ++ ();
 110     wxRegionIterator operator ++ (int);
 111
 112     wxCoord GetX() const;
 113     wxCoord GetY() const;
 114     wxCoord GetW() const;
 115     wxCoord GetWidth() const { return GetW(); }
 116     wxCoord GetH() const;
 117     wxCoord GetHeight() const { return GetH(); }
 118     wxRect GetRect() const;
 119
 120 private:
 121     void Init();
 122     void CreateRects( const wxRegion& r );
 123
 124     size_t   m_current;
 125     wxRegion m_region;
 126
 127     wxRect *m_rects;
 128     size_t  m_numRects;
 129
 130 private:
 131     DECLARE_DYNAMIC_CLASS(wxRegionIterator)
 132 };
 133
 134
 135 #endif
 136         // _WX_GTK_REGION_H_