include/wx/cocoa/region.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        region.h
   3 // Purpose:     wxRegion class
   4 // Author:      AUTHOR
   5 // Modified by:
   6 // Created:     ??/??/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) AUTHOR
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_REGION_H_
  13 #define _WX_REGION_H_
  14
  15 #if defined(__GNUG__) && !defined(__APPLE__)
  16 #pragma interface "region.h"
  17 #endif
  18
  19 #include "wx/list.h"
  20 #include "wx/gdiobj.h"
  21 #include "wx/gdicmn.h"
  22
  23 class WXDLLEXPORT wxRect;
  24 class WXDLLEXPORT wxPoint;
  25
  26 enum wxRegionContain {
  27         wxOutRegion = 0, wxPartRegion = 1, wxInRegion = 2
  28 };
  29
  30 // So far, for internal use only
  31 enum wxRegionOp {
  32 wxRGN_AND,          // Creates the intersection of the two combined regions.
  33 wxRGN_COPY,         // Creates a copy of the region identified by hrgnSrc1.
  34 wxRGN_DIFF,         // Combines the parts of hrgnSrc1 that are not part of hrgnSrc2.
  35 wxRGN_OR,           // Creates the union of two combined regions.
  36 wxRGN_XOR           // Creates the union of two combined regions except for any overlapping areas.
  37 };
  38
  39 class WXDLLEXPORT wxRegion : public wxGDIObject {
  40 DECLARE_DYNAMIC_CLASS(wxRegion);
  41         friend class WXDLLEXPORT wxRegionIterator;
  42 public:
  43     wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
  44     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
  45     wxRegion(const wxRect& rect);
  46     wxRegion();
  47     wxRegion( const wxBitmap& bmp,
  48               const wxColour& transColour = wxNullColour,
  49               int   tolerance = 0)
  50     {
  51         Union(bmp, transColour, tolerance);
  52     }
  53
  54     ~wxRegion();
  55
  56     //# Copying
  57     wxRegion(const wxRegion& r)
  58         : wxGDIObject()
  59     { Ref(r); }
  60     wxRegion& operator = (const wxRegion& r)
  61     { Ref(r); return (*this); }
  62
  63     //# Modify region
  64     // Clear current region
  65     void Clear();
  66
  67     // Union rectangle or region with this.
  68     bool Union(long x, long y, long width, long height)
  69         { return Combine(x, y, width, height, wxRGN_OR); }
  70     bool Union(const wxRect& rect)
  71         { return Combine(rect, wxRGN_OR); }
  72     bool Union(const wxRegion& region)
  73         { return Combine(region, wxRGN_OR); }
  74
  75     // Intersect rectangle or region with this.
  76     bool Intersect(long x, long y, long width, long height)
  77         { return Combine(x, y, width, height, wxRGN_AND); }
  78     bool Intersect(const wxRect& rect)
  79         { return Combine(rect, wxRGN_AND); }
  80     bool Intersect(const wxRegion& region)
  81         { return Combine(region, wxRGN_AND); }
  82
  83     // Subtract rectangle or region from this:
  84     // Combines the parts of 'this' that are not part of the second region.
  85     bool Subtract(long x, long y, long width, long height)
  86         { return Combine(x, y, width, height, wxRGN_DIFF); }
  87     bool Subtract(const wxRect& rect)
  88         { return Combine(rect, wxRGN_DIFF); }
  89     bool Subtract(const wxRegion& region)
  90         { return Combine(region, wxRGN_DIFF); }
  91
  92     // XOR: the union of two combined regions except for any overlapping areas.
  93     bool Xor(long x, long y, long width, long height)
  94         { return Combine(x, y, width, height, wxRGN_XOR); }
  95     bool Xor(const wxRect& rect)
  96         { return Combine(rect, wxRGN_XOR); }
  97     bool Xor(const wxRegion& region)
  98         { return Combine(region, wxRGN_XOR); }
  99
 100     //# Information on region
 101     // Outer bounds of region
 102     void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
 103     wxRect GetBox() const ;
 104
 105     // Is region empty?
 106     bool Empty() const;
 107     inline bool IsEmpty() const { return Empty(); }
 108
 109     //# Tests
 110     // Does the region contain the point (x,y)?
 111     wxRegionContain Contains(long x, long y) const;
 112     // Does the region contain the point pt?
 113     wxRegionContain Contains(const wxPoint& pt) const;
 114     // Does the region contain the rectangle (x, y, w, h)?
 115     wxRegionContain Contains(long x, long y, long w, long h) const;
 116     // Does the region contain the rectangle rect?
 117     wxRegionContain Contains(const wxRect& rect) const;
 118
 119     // Convert the region to a B&W bitmap with the black pixels being inside
 120     // the region.
 121     wxBitmap ConvertToBitmap() const;
 122
 123     // Use the non-transparent pixels of a wxBitmap for the region to combine
 124     // with this region.  If the bitmap has a mask then it will be used,
 125     // otherwise the colour to be treated as transparent may be specified,
 126     // along with an optional tolerance value.
 127     bool Union(const wxBitmap& bmp,
 128                const wxColour& transColour = wxNullColour,
 129                int   tolerance = 0);
 130
 131
 132     // Internal
 133     bool Combine(long x, long y, long width, long height, wxRegionOp op);
 134     bool Combine(const wxRegion& region, wxRegionOp op);
 135     bool Combine(const wxRect& rect, wxRegionOp op);
 136 };
 137
 138 class WXDLLEXPORT wxRegionIterator : public wxObject
 139 {
 140     DECLARE_DYNAMIC_CLASS(wxRegionIterator)
 141
 142 public:
 143     wxRegionIterator();
 144     wxRegionIterator(const wxRegion& region);
 145     wxRegionIterator(const wxRegionIterator& iterator);
 146     ~wxRegionIterator();
 147
 148     wxRegionIterator& operator=(const wxRegionIterator& iterator);
 149
 150     void Reset() { m_current = 0; }
 151     void Reset(const wxRegion& region);
 152
 153     operator bool () const { return m_current < m_numRects; }
 154     bool HaveRects() const { return m_current < m_numRects; }
 155
 156     wxRegionIterator& operator++();
 157     wxRegionIterator operator++(int);
 158
 159     long GetX() const;
 160     long GetY() const;
 161     long GetW() const;
 162     long GetWidth() const { return GetW(); }
 163     long GetH() const;
 164     long GetHeight() const { return GetH(); }
 165     wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
 166 private:
 167     void SetRects(long numRects, wxRect *rects);
 168
 169     long     m_current;
 170     long     m_numRects;
 171     wxRegion m_region;
 172     wxRect*  m_rects;
 173 };
 174
 175 #endif
 176         // _WX_REGION_H_