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 #ifdef __GNUG__
  15 #pragma interface "region.h"
  16 #endif
  17
  18 #include "wx/list.h"
  19 #include "wx/gdiobj.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/list.h"
  22
  23 class WXDLLEXPORT wxRect;
  24 class WXDLLEXPORT wxPoint;
  25 class MGLRegion;
  26
  27 enum wxRegionContain
  28 {
  29     wxOutRegion = 0,
  30     wxPartRegion = 1,
  31     wxInRegion = 2
  32 };
  33
  34 class WXDLLEXPORT wxRegion : public wxGDIObject
  35 {
  36     DECLARE_DYNAMIC_CLASS(wxRegion);
  37     friend class WXDLLEXPORT wxRegionIterator;
  38
  39 public:
  40     wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
  41     wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
  42     wxRegion(const wxRect& rect);
  43     wxRegion(const MGLRegion& region);
  44     wxRegion( const wxBitmap& bmp,
  45               const wxColour& transColour = wxNullColour,
  46               int   tolerance = 0)
  47     {
  48         Union(bmp, transColour, tolerance);
  49     }
  50
  51     wxRegion();
  52     ~wxRegion();
  53
  54     //# Copying
  55     inline wxRegion(const wxRegion& r)
  56         { Ref(r); }
  57     inline wxRegion& operator = (const wxRegion& r)
  58         { Ref(r); return (*this); }
  59
  60     //# Modify region
  61     // Clear current region
  62     void Clear(void);
  63
  64     bool Offset(wxCoord x, wxCoord y);
  65
  66     // Union rectangle or region with this.
  67     bool Union(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  68     bool Union(const wxRect& rect) { return Union(rect.x, rect.y, rect.width, rect.height); }
  69     bool Union(const wxRegion& region);
  70
  71     // Intersect rectangle or region with this.
  72     bool Intersect(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  73     bool Intersect(const wxRect& rect) { return Intersect(rect.x, rect.y, rect.width, rect.height); }
  74     bool Intersect(const wxRegion& region);
  75
  76     // Subtract rectangle or region from this:
  77     // Combines the parts of 'this' that are not part of the second region.
  78     bool Subtract(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  79     bool Subtract(const wxRect& rect) { return Subtract(rect.x, rect.y, rect.width, rect.height); }
  80     bool Subtract(const wxRegion& region);
  81
  82     // XOR: the union of two combined regions except for any overlapping areas.
  83     bool Xor(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  84     bool Xor(const wxRect& rect) { return Xor(rect.x, rect.y, rect.width, rect.height); }
  85     bool Xor(const wxRegion& region);
  86
  87     //# Information on region
  88     // Outer bounds of region
  89     void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
  90     wxRect GetBox(void) const ;
  91
  92     // Is region empty?
  93     bool Empty(void) const;
  94     inline bool IsEmpty(void) const { return Empty(); }
  95
  96     //# Tests
  97     // Does the region contain the point (x,y)?
  98     wxRegionContain Contains(wxCoord x, wxCoord y) const;
  99     // Does the region contain the point pt?
 100     wxRegionContain Contains(const wxPoint& pt) const;
 101     // Does the region contain the rectangle (x, y, w, h)?
 102     wxRegionContain Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const;
 103     // Does the region contain the rectangle rect?
 104     wxRegionContain Contains(const wxRect& rect) const;
 105
 106     // Convert the region to a B&W bitmap with the white pixels being inside
 107     // the region.
 108     wxBitmap ConvertToBitmap() const;
 109
 110     // Use the non-transparent pixels of a wxBitmap for the region to combine
 111     // with this region.  If the bitmap has a mask then it will be used,
 112     // otherwise the colour to be treated as transparent may be specified,
 113     // along with an optional tolerance value.
 114     bool Union(const wxBitmap& bmp,
 115                const wxColour& transColour = wxNullColour,
 116                int   tolerance = 0);
 117
 118
 119     // implementation from now on:
 120     const MGLRegion& GetMGLRegion() const;
 121
 122 protected:
 123     // ref counting code
 124     virtual wxObjectRefData *CreateRefData() const;
 125     virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
 126 };
 127
 128
 129 WX_DECLARE_EXPORTED_LIST(wxRect, wxRegionRectList);
 130
 131 class WXDLLEXPORT wxRegionIterator : public wxObject
 132 {
 133     DECLARE_DYNAMIC_CLASS(wxRegionIterator);
 134 public:
 135     wxRegionIterator(void);
 136     wxRegionIterator(const wxRegion& region);
 137     ~wxRegionIterator(void);
 138
 139     void Reset(void) { m_currentNode = NULL; }
 140     void Reset(const wxRegion& region);
 141
 142 #ifndef __SALFORDC__
 143     operator bool (void) const { return (m_currentNode != NULL); }
 144 #endif
 145
 146     bool HaveRects(void) const { return (m_currentNode != NULL); }
 147
 148     void operator ++ (void);
 149     void operator ++ (int);
 150
 151     wxCoord GetX(void) const;
 152     wxCoord GetY(void) const;
 153     wxCoord GetW(void) const;
 154     wxCoord GetWidth(void) const { return GetW(); }
 155     wxCoord GetH(void) const;
 156     wxCoord GetHeight(void) const { return GetH(); }
 157     wxRect GetRect() const { return wxRect(GetX(), GetY(), GetWidth(), GetHeight()); }
 158
 159 private:
 160     wxRegionRectList         m_rects;
 161     wxRegionRectList::Node  *m_currentNode;
 162 };
 163
 164 #endif
 165     // _WX_REGION_H_