include/wx/x11/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, Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_REGION_H_
  13 #define _WX_REGION_H_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 //-----------------------------------------------------------------------------
  24 // classes
  25 //-----------------------------------------------------------------------------
  26
  27 class wxRegion;
  28
  29 //-----------------------------------------------------------------------------
  30 // constants
  31 //-----------------------------------------------------------------------------
  32
  33 enum wxRegionContain
  34 {
  35     wxOutRegion = 0,
  36     wxPartRegion = 1,
  37     wxInRegion = 2
  38 };
  39
  40 // So far, for internal use only
  41 enum wxRegionOp
  42 {
  43    wxRGN_AND,          // Creates the intersection of the two combined regions.
  44    wxRGN_COPY,         // Creates a copy of the region identified by hrgnSrc1.
  45    wxRGN_DIFF,         // Combines the parts of hrgnSrc1 that are not part of hrgnSrc2.
  46    wxRGN_OR,           // Creates the union of two combined regions.
  47    wxRGN_XOR           // Creates the union of two combined regions except for any overlapping areas.
  48 };
  49
  50 // ----------------------------------------------------------------------------
  51 // wxRegion
  52 // ----------------------------------------------------------------------------
  53
  54 class wxRegion : public wxGDIObject
  55 {
  56 public:
  57     wxRegion() { }
  58
  59     wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
  60     {
  61         InitRect(x, y, w, h);
  62     }
  63
  64     wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
  65     {
  66         InitRect(topLeft.x, topLeft.y,
  67                  bottomRight.x - topLeft.x, bottomRight.y - topLeft.y);
  68     }
  69
  70     wxRegion( const wxRect& rect )
  71     {
  72         InitRect(rect.x, rect.y, rect.width, rect.height);
  73     }
  74
  75     wxRegion( size_t n, const wxPoint *points, int fillStyle = wxODDEVEN_RULE );
  76
  77     wxRegion( const wxBitmap& bmp)
  78     {
  79         Union(bmp);
  80     }
  81     wxRegion( const wxBitmap& bmp,
  82               const wxColour& transColour, int tolerance = 0)
  83     {
  84         Union(bmp, transColour, tolerance);
  85     }
  86
  87     ~wxRegion();
  88
  89     wxRegion( const wxRegion& region ) { Ref(region); }
  90     wxRegion& operator = ( const wxRegion& region ) { Ref(region); return *this; }
  91
  92     bool Ok() const { return m_refData != NULL; }
  93
  94     bool operator == ( const wxRegion& region );
  95     bool operator != ( const wxRegion& region ) { return !(*this == region); }
  96
  97     void Clear();
  98
  99     bool Offset( wxCoord x, wxCoord y );
 100
 101     bool Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
 102     bool Union( const wxRect& rect );
 103     bool Union( const wxRegion& region );
 104
 105     bool Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
 106     bool Intersect( const wxRect& rect );
 107     bool Intersect( const wxRegion& region );
 108
 109     bool Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
 110     bool Subtract( const wxRect& rect );
 111     bool Subtract( const wxRegion& region );
 112
 113     bool Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
 114     bool Xor( const wxRect& rect );
 115     bool Xor( const wxRegion& region );
 116
 117     void GetBox( wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h ) const;
 118     wxRect GetBox() const ;
 119
 120     bool Empty() const;
 121     bool IsEmpty() const { return Empty(); }
 122
 123     wxRegionContain Contains( wxCoord x, wxCoord y ) const;
 124     wxRegionContain Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const;
 125     wxRegionContain Contains(const wxPoint& pt) const;
 126     wxRegionContain Contains(const wxRect& rect) const;
 127
 128     // Convert the region to a B&W bitmap with the white pixels being inside
 129     // the region.
 130     wxBitmap ConvertToBitmap() const;
 131
 132     // Use the non-transparent pixels of a wxBitmap for the region to combine
 133     // with this region.  First version takes transparency from bitmap's mask,
 134     // second lets the user specify the colour to be treated as transparent
 135     // along with an optional tolerance value.
 136     // NOTE: implemented in common/rgncmn.cpp
 137     bool Union(const wxBitmap& bmp);
 138     bool Union(const wxBitmap& bmp,
 139                const wxColour& transColour, int tolerance = 0);
 140
 141
 142 public:
 143     WXRegion *GetX11Region() const;
 144
 145 protected:
 146     // ref counting code
 147     virtual wxObjectRefData *CreateRefData() const;
 148     virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
 149
 150     // common part of ctors for a rectangle region
 151     void InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
 152
 153 private:
 154     DECLARE_DYNAMIC_CLASS(wxRegion)
 155 };
 156
 157 // ----------------------------------------------------------------------------
 158 // wxRegionIterator: decomposes a region into rectangles
 159 // ----------------------------------------------------------------------------
 160
 161 class wxRegionIterator: public wxObject
 162 {
 163 public:
 164     wxRegionIterator();
 165     wxRegionIterator(const wxRegion& region);
 166
 167     void Reset() { m_current = 0u; }
 168     void Reset(const wxRegion& region);
 169
 170     operator bool () const;
 171     bool HaveRects() const;
 172
 173     void operator ++ ();
 174     void operator ++ (int);
 175
 176     wxCoord GetX() const;
 177     wxCoord GetY() const;
 178     wxCoord GetW() const;
 179     wxCoord GetWidth() const { return GetW(); }
 180     wxCoord GetH() const;
 181     wxCoord GetHeight() const { return GetH(); }
 182     wxRect GetRect() const;
 183
 184 private:
 185     size_t   m_current;
 186     wxRegion m_region;
 187
 188 private:
 189     DECLARE_DYNAMIC_CLASS(wxRegionIterator)
 190 };
 191
 192 #endif
 193 // _WX_REGION_H_