include/wx/mgl/region.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        region.h
   3 // Purpose:     wxRegion class
   4 // Author:      Vaclav Slavik
   5 // Created:     2001/03/12
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_REGION_H_
  12 #define _WX_REGION_H_
  13
  14 #include "wx/list.h"
  15 #include "wx/gdiobj.h"
  16 #include "wx/gdicmn.h"
  17
  18 class WXDLLEXPORT wxRect;
  19 class WXDLLEXPORT wxPoint;
  20 class MGLRegion;
  21
  22 class WXDLLEXPORT wxRegion : public wxGDIObject
  23 {
  24     DECLARE_DYNAMIC_CLASS(wxRegion);
  25     friend class WXDLLEXPORT wxRegionIterator;
  26
  27 public:
  28     wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
  29     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
  30     wxRegion(const wxRect& rect);
  31     wxRegion(const MGLRegion& region);
  32     wxRegion( const wxBitmap& bmp)
  33     {
  34         Union(bmp);
  35     }
  36     wxRegion( const wxBitmap& bmp,
  37               const wxColour& transColour, int tolerance = 0)
  38     {
  39         Union(bmp, transColour, tolerance);
  40     }
  41
  42     wxRegion();
  43     virtual ~wxRegion();
  44
  45     //# Modify region
  46     // Clear current region
  47     void Clear(void);
  48
  49     bool Offset(wxCoord x, wxCoord y);
  50
  51     // Union rectangle or region with this.
  52     bool Union(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  53     bool Union(const wxRect& rect) { return Union(rect.x, rect.y, rect.width, rect.height); }
  54     bool Union(const wxRegion& region);
  55
  56     // Intersect rectangle or region with this.
  57     bool Intersect(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  58     bool Intersect(const wxRect& rect) { return Intersect(rect.x, rect.y, rect.width, rect.height); }
  59     bool Intersect(const wxRegion& region);
  60
  61     // Subtract rectangle or region from this:
  62     // Combines the parts of 'this' that are not part of the second region.
  63     bool Subtract(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  64     bool Subtract(const wxRect& rect) { return Subtract(rect.x, rect.y, rect.width, rect.height); }
  65     bool Subtract(const wxRegion& region);
  66
  67     // XOR: the union of two combined regions except for any overlapping areas.
  68     bool Xor(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  69     bool Xor(const wxRect& rect) { return Xor(rect.x, rect.y, rect.width, rect.height); }
  70     bool Xor(const wxRegion& region);
  71
  72     //# Information on region
  73     // Outer bounds of region
  74     void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
  75     wxRect GetBox(void) const ;
  76
  77     // Is region empty?
  78     bool Empty(void) const;
  79     inline bool IsEmpty(void) const { return Empty(); }
  80
  81     //# Tests
  82     // Does the region contain the point (x,y)?
  83     wxRegionContain Contains(wxCoord x, wxCoord y) const;
  84     // Does the region contain the point pt?
  85     wxRegionContain Contains(const wxPoint& pt) const;
  86     // Does the region contain the rectangle (x, y, w, h)?
  87     wxRegionContain Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const;
  88     // Does the region contain the rectangle rect?
  89     wxRegionContain Contains(const wxRect& rect) const;
  90
  91     // Convert the region to a B&W bitmap with the white pixels being inside
  92     // the region.
  93     wxBitmap ConvertToBitmap() const;
  94
  95     // Use the non-transparent pixels of a wxBitmap for the region to combine
  96     // with this region.  First version takes transparency from bitmap's mask,
  97     // second lets the user specify the colour to be treated as transparent
  98     // along with an optional tolerance value.
  99     // NOTE: implemented in common/rgncmn.cpp
 100     bool Union(const wxBitmap& bmp);
 101     bool Union(const wxBitmap& bmp,
 102                const wxColour& transColour, int tolerance = 0);
 103
 104
 105     // implementation from now on:
 106     const MGLRegion& GetMGLRegion() const;
 107
 108 protected:
 109     // ref counting code
 110     virtual wxObjectRefData *CreateRefData() const;
 111     virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
 112 };
 113
 114
 115 WX_DECLARE_EXPORTED_LIST(wxRect, wxRegionRectList);
 116
 117 class WXDLLEXPORT wxRegionIterator : public wxObject
 118 {
 119     DECLARE_DYNAMIC_CLASS(wxRegionIterator);
 120 public:
 121     wxRegionIterator(void);
 122     wxRegionIterator(const wxRegion& region);
 123     virtual ~wxRegionIterator(void);
 124
 125     void Reset(void) { m_currentNode = NULL; }
 126     void Reset(const wxRegion& region);
 127
 128 #ifndef __SALFORDC__
 129     operator bool (void) const { return (m_currentNode != NULL); }
 130 #endif
 131
 132     bool HaveRects(void) const { return (m_currentNode != NULL); }
 133
 134     void operator ++ (void);
 135     void operator ++ (int);
 136
 137     wxCoord GetX(void) const;
 138     wxCoord GetY(void) const;
 139     wxCoord GetW(void) const;
 140     wxCoord GetWidth(void) const { return GetW(); }
 141     wxCoord GetH(void) const;
 142     wxCoord GetHeight(void) const { return GetH(); }
 143     wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
 144
 145 private:
 146     wxRegionRectList         m_rects;
 147     wxRegionRectList::Node  *m_currentNode;
 148 };
 149
 150 #endif
 151     // _WX_REGION_H_