src/common/colourcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/colourcmn.cpp
   3 // Purpose:     wxColourBase implementation
   4 // Author:      Francesco Montorsi
   5 // Modified by:
   6 // Created:     20/4/2006
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Francesco Montorsi
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12
  13 // For compilers that support precompilation, includes "wx.h".
  14 #include "wx/wxprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #include "wx/colour.h"
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/log.h"
  24     #include "wx/utils.h"
  25     #include "wx/gdicmn.h"
  26 #endif
  27
  28 #if wxUSE_VARIANT
  29 IMPLEMENT_VARIANT_OBJECT_EXPORTED(wxColour,WXDLLEXPORT)
  30 #endif
  31
  32 // ============================================================================
  33 // wxString <-> wxColour conversions
  34 // ============================================================================
  35
  36 bool wxColourBase::FromString(const wxChar *str)
  37 {
  38     if ( str == NULL || str[0] == wxT('\0'))
  39         return false;       // invalid or empty string
  40
  41     if ( wxStrncmp(str, wxT("RGB"), 3) == 0 ||
  42          wxStrncmp(str, wxT("rgb"), 3) == 0 )
  43     {
  44         // CSS-like RGB specification
  45         // according to http://www.w3.org/TR/REC-CSS2/syndata.html#color-units
  46         // values outside 0-255 range are allowed but should be clipped
  47         int red, green, blue;
  48         if (wxSscanf(&str[3], wxT("(%d, %d, %d)"), &red, &green, &blue) != 3)
  49             return false;
  50
  51         Set((unsigned char)wxClip(red,0,255),
  52             (unsigned char)wxClip(green,0,255),
  53             (unsigned char)wxClip(blue,0,255));
  54     }
  55     else if ( str[0] == wxT('#') && wxStrlen(str) == 7 )
  56     {
  57         // hexadecimal prefixed with # (HTML syntax)
  58         unsigned long tmp;
  59         if (wxSscanf(&str[1], wxT("%lx"), &tmp) != 1)
  60             return false;
  61
  62         Set((unsigned char)(tmp >> 16),
  63             (unsigned char)(tmp >> 8),
  64             (unsigned char)tmp);
  65     }
  66     else if (wxTheColourDatabase) // a colour name ?
  67     {
  68         // we can't do
  69         // *this = wxTheColourDatabase->Find(str)
  70         // because this place can be called from constructor
  71         // and 'this' could not be available yet
  72         wxColour clr = wxTheColourDatabase->Find(str);
  73         if (clr.Ok())
  74             Set((unsigned char)clr.Red(),
  75                 (unsigned char)clr.Green(),
  76                 (unsigned char)clr.Blue());
  77     }
  78
  79     if (Ok())
  80         return true;
  81
  82     wxLogDebug(wxT("wxColour::Set - couldn't set to colour string '%s'"), str);
  83     return false;
  84 }
  85
  86 wxString wxColourBase::GetAsString(long flags) const
  87 {
  88     wxString colName;
  89
  90     if (flags & wxC2S_NAME)
  91         colName = wxTheColourDatabase->FindName((const wxColour &)(*this)).MakeLower();
  92
  93     if ( colName.empty() && (flags & wxC2S_CSS_SYNTAX) )
  94     {
  95         // no name for this colour; return it in CSS syntax
  96         colName.Printf(wxT("rgb(%d, %d, %d)"),
  97                        Red(), Green(), Blue());
  98     }
  99     else if ( colName.empty() && (flags & wxC2S_HTML_SYNTAX) )
 100     {
 101         // no name for this colour; return it in HTML syntax
 102         colName.Printf(wxT("#%02X%02X%02X"),
 103                        Red(), Green(), Blue());
 104     }
 105
 106     // this function always returns a non-empty string
 107     wxASSERT_MSG(!colName.empty(),
 108                  wxT("Invalid wxColour -> wxString conversion flags"));
 109
 110     return colName;
 111 }
 112
 113 #if WXWIN_COMPATIBILITY_2_6
 114
 115 // static
 116 wxColour wxColourBase::CreateByName(const wxString& name)
 117 {
 118     return wxColour(name);
 119 }
 120
 121 void wxColourBase::InitFromName(const wxString& col)
 122 {
 123     Set(col);
 124 }
 125
 126 #endif // WXWIN_COMPATIBILITY_2_6