include/wx/motif/region.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        region.h
   3 // Purpose:     wxRegion class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   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();
  46         ~wxRegion();
  47
  48         //# Copying
  49         inline wxRegion(const wxRegion& r)
  50                 { Ref(r); }
  51         inline wxRegion& operator = (const wxRegion& r)
  52                 { Ref(r); return (*this); }
  53
  54         //# Modify region
  55         // Clear current region
  56         void Clear();
  57
  58         // Union rectangle or region with this.
  59         inline bool Union(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_OR); }
  60         inline bool Union(const wxRect& rect) { return Combine(rect, wxRGN_OR); }
  61         inline bool Union(const wxRegion& region) { return Combine(region, wxRGN_OR); }
  62
  63         // Intersect rectangle or region with this.
  64         inline bool Intersect(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_AND); }
  65         inline bool Intersect(const wxRect& rect)  { return Combine(rect, wxRGN_AND); }
  66         inline bool Intersect(const wxRegion& region)  { return Combine(region, wxRGN_AND); }
  67
  68         // Subtract rectangle or region from this:
  69     // Combines the parts of 'this' that are not part of the second region.
  70         inline bool Subtract(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_DIFF); }
  71         inline bool Subtract(const wxRect& rect)  { return Combine(rect, wxRGN_DIFF); }
  72         inline bool Subtract(const wxRegion& region)  { return Combine(region, wxRGN_DIFF); }
  73
  74         // XOR: the union of two combined regions except for any overlapping areas.
  75         inline bool Xor(long x, long y, long width, long height) { return Combine(x, y, width, height, wxRGN_XOR); }
  76         inline bool Xor(const wxRect& rect)  { return Combine(rect, wxRGN_XOR); }
  77         inline bool Xor(const wxRegion& region)  { return Combine(region, wxRGN_XOR); }
  78
  79         //# Information on region
  80         // Outer bounds of region
  81         void GetBox(long& x, long& y, long&w, long &h) const;
  82         wxRect GetBox() const ;
  83
  84         // Is region empty?
  85         bool Empty() const;
  86     inline bool IsEmpty() const { return Empty(); }
  87
  88         //# Tests
  89         // Does the region contain the point (x,y)?
  90         wxRegionContain Contains(long x, long y) const;
  91         // Does the region contain the point pt?
  92         wxRegionContain Contains(const wxPoint& pt) const;
  93         // Does the region contain the rectangle (x, y, w, h)?
  94         wxRegionContain Contains(long x, long y, long w, long h) const;
  95         // Does the region contain the rectangle rect?
  96         wxRegionContain Contains(const wxRect& rect) const;
  97
  98 // Internal
  99         bool Combine(long x, long y, long width, long height, wxRegionOp op);
 100         bool Combine(const wxRegion& region, wxRegionOp op);
 101         bool Combine(const wxRect& rect, wxRegionOp op);
 102 };
 103
 104 class WXDLLEXPORT wxRegionIterator : public wxObject {
 105 DECLARE_DYNAMIC_CLASS(wxRegionIterator);
 106 public:
 107         wxRegionIterator();
 108         wxRegionIterator(const wxRegion& region);
 109         ~wxRegionIterator();
 110
 111         void Reset() { m_current = 0; }
 112         void Reset(const wxRegion& region);
 113
 114         operator bool () const { return m_current < m_numRects; }
 115         bool HaveRects() const { return m_current < m_numRects; }
 116
 117         void operator ++ ();
 118         void operator ++ (int);
 119
 120         long GetX() const;
 121         long GetY() const;
 122         long GetW() const;
 123         long GetWidth() const { return GetW(); }
 124         long GetH() const;
 125         long GetHeight() const { return GetH(); }
 126
 127 private:
 128         long     m_current;
 129         long     m_numRects;
 130         wxRegion m_region;
 131     wxRect*  m_rects;
 132 };
 133
 134 #endif
 135         // _WX_REGION_H_