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 #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(long x, long y, long w, long h);
  44     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
  45     wxRegion(const wxRect& rect);
  46     wxRegion(WXHRGN hRegion); // Hangs on to this region
  47
  48         wxRegion(void);
  49         ~wxRegion(void);
  50
  51         //# Copying
  52         inline wxRegion(const wxRegion& r)
  53                 { Ref(r); }
  54         inline wxRegion& operator = (const wxRegion& r)
  55                 { Ref(r); return (*this); }
  56
  57         //# Modify region
  58         // Clear current region
  59         void Clear(void);
  60
  61         // Union rectangle or region with this.
  62         inline bool Union(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_OR); }
  63         inline bool Union(const wxRect& rect) { return Combine(rect, wxRGN_OR); }
  64         inline bool Union(const wxRegion& region) { return Combine(region, wxRGN_OR); }
  65
  66         // Intersect rectangle or region with this.
  67         inline bool Intersect(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_AND); }
  68         inline bool Intersect(const wxRect& rect)  { return Combine(rect, wxRGN_AND); }
  69         inline bool Intersect(const wxRegion& region)  { return Combine(region, wxRGN_AND); }
  70
  71         // Subtract rectangle or region from this:
  72     // Combines the parts of 'this' that are not part of the second region.
  73         inline bool Subtract(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_DIFF); }
  74         inline bool Subtract(const wxRect& rect)  { return Combine(rect, wxRGN_DIFF); }
  75         inline bool Subtract(const wxRegion& region)  { return Combine(region, wxRGN_DIFF); }
  76
  77         // XOR: the union of two combined regions except for any overlapping areas.
  78         inline bool Xor(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_XOR); }
  79         inline bool Xor(const wxRect& rect)  { return Combine(rect, wxRGN_XOR); }
  80         inline bool Xor(const wxRegion& region)  { return Combine(region, wxRGN_XOR); }
  81
  82         //# Information on region
  83         // Outer bounds of region
  84         void GetBox(long& x, long& y, long&w, long &h) const;
  85         wxRect GetBox(void) const ;
  86
  87         // Is region empty?
  88         bool Empty(void) const;
  89     inline bool IsEmpty(void) const { return Empty(); }
  90
  91         //# Tests
  92         // Does the region contain the point (x,y)?
  93         wxRegionContain Contains(long x, long y) const;
  94         // Does the region contain the point pt?
  95         wxRegionContain Contains(const wxPoint& pt) const;
  96         // Does the region contain the rectangle (x, y, w, h)?
  97         wxRegionContain Contains(long x, long y, long w, long h) const;
  98         // Does the region contain the rectangle rect?
  99         wxRegionContain Contains(const wxRect& rect) const;
 100
 101 // Internal
 102         bool Combine(long x, long y, long width, long height, wxRegionOp op);
 103         bool Combine(const wxRegion& region, wxRegionOp op);
 104         bool Combine(const wxRect& rect, wxRegionOp op);
 105
 106     // Get internal region handle
 107     WXHRGN GetHRGN() const;
 108 };
 109
 110 class WXDLLEXPORT wxRegionIterator : public wxObject {
 111 DECLARE_DYNAMIC_CLASS(wxRegionIterator);
 112 public:
 113         wxRegionIterator(void);
 114         wxRegionIterator(const wxRegion& region);
 115         ~wxRegionIterator(void);
 116
 117         void Reset(void) { m_current = 0; }
 118         void Reset(const wxRegion& region);
 119
 120         operator bool (void) const { return m_current < m_numRects; }
 121         bool HaveRects(void) const { return m_current < m_numRects; }
 122
 123         void operator ++ (void);
 124         void operator ++ (int);
 125
 126         long GetX(void) const;
 127         long GetY(void) const;
 128         long GetW(void) const;
 129         long GetWidth(void) const { return GetW(); }
 130         long GetH(void) const;
 131         long GetHeight(void) const { return GetH(); }
 132     wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
 133
 134 private:
 135         long     m_current;
 136         long     m_numRects;
 137         wxRegion m_region;
 138     wxRect*  m_rects;
 139 };
 140
 141 #endif
 142         // _WX_REGION_H_