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