include/wx/msw/region.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        region.h
   3 // Purpose:     wxRegion class
   4 // Author:      Markus Holzem, Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_REGION_H_
  13 #define _WX_REGION_H_
  14
  15 #ifdef __GNUG__
  16 #pragma interface "region.h"
  17 #endif
  18
  19 #include "wx/list.h"
  20 #include "wx/gdiobj.h"
  21
  22 class WXDLLEXPORT wxRect;
  23 class WXDLLEXPORT wxPoint;
  24
  25 enum wxRegionContain {
  26         wxOutRegion = 0, wxPartRegion = 1, wxInRegion = 2
  27 };
  28
  29 // So far, for internal use only
  30 enum wxRegionOp {
  31 wxRGN_AND,          // Creates the intersection of the two combined regions.
  32 wxRGN_COPY,         // Creates a copy of the region identified by hrgnSrc1.
  33 wxRGN_DIFF,         // Combines the parts of hrgnSrc1 that are not part of hrgnSrc2.
  34 wxRGN_OR,           // Creates the union of two combined regions.
  35 wxRGN_XOR           // Creates the union of two combined regions except for any overlapping areas.
  36 };
  37
  38 class WXDLLEXPORT wxRegion : public wxGDIObject {
  39 DECLARE_DYNAMIC_CLASS(wxRegion);
  40         friend class WXDLLEXPORT wxRegionIterator;
  41 public:
  42     wxRegion(long x, long y, long w, long h);
  43     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
  44     wxRegion(const wxRect& rect);
  45     wxRegion(WXHRGN hRegion); // Hangs on to this region
  46
  47         wxRegion(void);
  48         ~wxRegion(void);
  49
  50         //# Copying
  51         inline wxRegion(const wxRegion& r)
  52                 { Ref(r); }
  53         inline wxRegion& operator = (const wxRegion& r)
  54                 { Ref(r); return (*this); }
  55
  56         //# Modify region
  57         // Clear current region
  58         void Clear(void);
  59
  60         // Union rectangle or region with this.
  61         inline bool Union(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_OR); }
  62         inline bool Union(const wxRect& rect) { return Combine(rect, wxRGN_OR); }
  63         inline bool Union(const wxRegion& region) { return Combine(region, wxRGN_OR); }
  64
  65         // Intersect rectangle or region with this.
  66         inline bool Intersect(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_AND); }
  67         inline bool Intersect(const wxRect& rect)  { return Combine(rect, wxRGN_AND); }
  68         inline bool Intersect(const wxRegion& region)  { return Combine(region, wxRGN_AND); }
  69
  70         // Subtract rectangle or region from this:
  71     // Combines the parts of 'this' that are not part of the second region.
  72         inline bool Subtract(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_DIFF); }
  73         inline bool Subtract(const wxRect& rect)  { return Combine(rect, wxRGN_DIFF); }
  74         inline bool Subtract(const wxRegion& region)  { return Combine(region, wxRGN_DIFF); }
  75
  76         // XOR: the union of two combined regions except for any overlapping areas.
  77         inline bool Xor(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_XOR); }
  78         inline bool Xor(const wxRect& rect)  { return Combine(rect, wxRGN_XOR); }
  79         inline bool Xor(const wxRegion& region)  { return Combine(region, wxRGN_XOR); }
  80
  81         //# Information on region
  82         // Outer bounds of region
  83         void GetBox(long& x, long& y, long&w, long &h) const;
  84         wxRect GetBox(void) const ;
  85
  86         // Is region empty?
  87         bool Empty(void) const;
  88     inline bool IsEmpty(void) const { return Empty(); }
  89
  90         //# Tests
  91         // Does the region contain the point (x,y)?
  92         wxRegionContain Contains(long x, long y) const;
  93         // Does the region contain the point pt?
  94         wxRegionContain Contains(const wxPoint& pt) const;
  95         // Does the region contain the rectangle (x, y, w, h)?
  96         wxRegionContain Contains(long x, long y, long w, long h) const;
  97         // Does the region contain the rectangle rect?
  98         wxRegionContain Contains(const wxRect& rect) const;
  99
 100 // Internal
 101         bool Combine(long x, long y, long width, long height, wxRegionOp op);
 102         bool Combine(const wxRegion& region, wxRegionOp op);
 103         bool Combine(const wxRect& rect, wxRegionOp op);
 104 };
 105
 106 class WXDLLEXPORT wxRegionIterator : public wxObject {
 107 DECLARE_DYNAMIC_CLASS(wxRegionIterator);
 108 public:
 109         wxRegionIterator(void);
 110         wxRegionIterator(const wxRegion& region);
 111         ~wxRegionIterator(void);
 112
 113         void Reset(void) { m_current = 0; }
 114         void Reset(const wxRegion& region);
 115
 116         operator bool (void) const { return m_current < m_numRects; }
 117         bool HaveRects(void) const { return m_current < m_numRects; }
 118
 119         void operator ++ (void);
 120         void operator ++ (int);
 121
 122         long GetX(void) const;
 123         long GetY(void) const;
 124         long GetW(void) const;
 125         long GetWidth(void) const { return GetW(); }
 126         long GetH(void) const;
 127         long GetHeight(void) const { return GetH(); }
 128
 129 private:
 130         long     m_current;
 131         long     m_numRects;
 132         wxRegion m_region;
 133     wxRect*  m_rects;
 134 };
 135
 136 #endif
 137         // _WX_REGION_H_