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 enum wxRegionContain
  23 {
  24     wxOutRegion = 0,
  25     wxPartRegion = 1,
  26     wxInRegion = 2
  27 };
  28
  29 class WXDLLEXPORT wxRegion : public wxGDIObject
  30 {
  31     DECLARE_DYNAMIC_CLASS(wxRegion);
  32     friend class WXDLLEXPORT wxRegionIterator;
  33
  34 public:
  35     wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
  36     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
  37     wxRegion(const wxRect& rect);
  38     wxRegion(const MGLRegion& region);
  39     wxRegion( const wxBitmap& bmp)
  40     {
  41         Union(bmp);
  42     }
  43     wxRegion( const wxBitmap& bmp,
  44               const wxColour& transColour, int tolerance = 0)
  45     {
  46         Union(bmp, transColour, tolerance);
  47     }
  48
  49     wxRegion();
  50     ~wxRegion();
  51
  52     //# Modify region
  53     // Clear current region
  54     void Clear(void);
  55
  56     bool Offset(wxCoord x, wxCoord y);
  57
  58     // Union rectangle or region with this.
  59     bool Union(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  60     bool Union(const wxRect& rect) { return Union(rect.x, rect.y, rect.width, rect.height); }
  61     bool Union(const wxRegion& region);
  62
  63     // Intersect rectangle or region with this.
  64     bool Intersect(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  65     bool Intersect(const wxRect& rect) { return Intersect(rect.x, rect.y, rect.width, rect.height); }
  66     bool Intersect(const wxRegion& region);
  67
  68     // Subtract rectangle or region from this:
  69     // Combines the parts of 'this' that are not part of the second region.
  70     bool Subtract(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  71     bool Subtract(const wxRect& rect) { return Subtract(rect.x, rect.y, rect.width, rect.height); }
  72     bool Subtract(const wxRegion& region);
  73
  74     // XOR: the union of two combined regions except for any overlapping areas.
  75     bool Xor(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  76     bool Xor(const wxRect& rect) { return Xor(rect.x, rect.y, rect.width, rect.height); }
  77     bool Xor(const wxRegion& region);
  78
  79     //# Information on region
  80     // Outer bounds of region
  81     void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
  82     wxRect GetBox(void) const ;
  83
  84     // Is region empty?
  85     bool Empty(void) const;
  86     inline bool IsEmpty(void) const { return Empty(); }
  87
  88     //# Tests
  89     // Does the region contain the point (x,y)?
  90     wxRegionContain Contains(wxCoord x, wxCoord 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(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const;
  95     // Does the region contain the rectangle rect?
  96     wxRegionContain Contains(const wxRect& rect) const;
  97
  98     // Convert the region to a B&W bitmap with the white pixels being inside
  99     // the region.
 100     wxBitmap ConvertToBitmap() const;
 101
 102     // Use the non-transparent pixels of a wxBitmap for the region to combine
 103     // with this region.  First version takes transparency from bitmap's mask,
 104     // second lets the user specify the colour to be treated as transparent
 105     // along with an optional tolerance value.
 106     // NOTE: implemented in common/rgncmn.cpp
 107     bool Union(const wxBitmap& bmp);
 108     bool Union(const wxBitmap& bmp,
 109                const wxColour& transColour, int tolerance = 0);
 110
 111
 112     // implementation from now on:
 113     const MGLRegion& GetMGLRegion() const;
 114
 115 protected:
 116     // ref counting code
 117     virtual wxObjectRefData *CreateRefData() const;
 118     virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
 119 };
 120
 121
 122 WX_DECLARE_EXPORTED_LIST(wxRect, wxRegionRectList);
 123
 124 class WXDLLEXPORT wxRegionIterator : public wxObject
 125 {
 126     DECLARE_DYNAMIC_CLASS(wxRegionIterator);
 127 public:
 128     wxRegionIterator(void);
 129     wxRegionIterator(const wxRegion& region);
 130     ~wxRegionIterator(void);
 131
 132     void Reset(void) { m_currentNode = NULL; }
 133     void Reset(const wxRegion& region);
 134
 135 #ifndef __SALFORDC__
 136     operator bool (void) const { return (m_currentNode != NULL); }
 137 #endif
 138
 139     bool HaveRects(void) const { return (m_currentNode != NULL); }
 140
 141     void operator ++ (void);
 142     void operator ++ (int);
 143
 144     wxCoord GetX(void) const;
 145     wxCoord GetY(void) const;
 146     wxCoord GetW(void) const;
 147     wxCoord GetWidth(void) const { return GetW(); }
 148     wxCoord GetH(void) const;
 149     wxCoord GetHeight(void) const { return GetH(); }
 150     wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
 151
 152 private:
 153     wxRegionRectList         m_rects;
 154     wxRegionRectList::Node  *m_currentNode;
 155 };
 156
 157 #endif
 158     // _WX_REGION_H_