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 #include "wx/gdicmn.h"
  23 #include "wx/log.h"
  24
  25
  26
  27 // ============================================================================
  28 // wxString <-> wxColour conversions
  29 // ============================================================================
  30
  31 bool wxColourBase::FromString(const wxChar *str)
  32 {
  33     if ( str == NULL || str[0] == wxT('\0'))
  34         return false;       // invalid or empty string
  35
  36     if ( wxStrncmp(str, wxT("RGB"), 3) == 0 ||
  37          wxStrncmp(str, wxT("rgb"), 3) == 0 )
  38     {
  39         // RGB specification CSS-like
  40         int red, green, blue;
  41         if (wxSscanf(&str[3], wxT("(%d, %d, %d)"), &red, &green, &blue) != 3)
  42             return false;
  43
  44         Set((unsigned char)red, (unsigned char)green, (unsigned char)blue);
  45     }
  46     else if ( str[0] == wxT('#') && wxStrlen(str) == 7 )
  47     {
  48         // hexadecimal prefixed with # (HTML syntax)
  49         unsigned long tmp;
  50         if (wxSscanf(&str[1], wxT("%lX"), &tmp) != 1)
  51             return false;
  52
  53         Set(tmp);   // set from packed long
  54     }
  55     else if (wxTheColourDatabase) // a colour name ?
  56     {
  57         // we can't do
  58         // *this = wxTheColourDatabase->Find(str)
  59         // because this place can be called from constructor
  60         // and 'this' could not be available yet
  61         wxColour clr = wxTheColourDatabase->Find(str);
  62         if (clr.Ok())
  63             Set((unsigned char)clr.Red(),
  64                 (unsigned char)clr.Green(),
  65                 (unsigned char)clr.Blue());
  66     }
  67
  68     if (Ok())
  69         return true;
  70
  71     wxLogDebug(wxT("wxColour::Set - couldn't set to colour string '%s'"), str);
  72     return false;
  73 }
  74
  75 wxString wxColourBase::GetAsString(long flags) const
  76 {
  77     wxString colName;
  78
  79     if (flags & wxC2S_NAME)
  80         colName = wxTheColourDatabase->FindName((const wxColour &)(*this)).MakeLower();
  81
  82     if ( colName.empty() && (flags & wxC2S_CSS_SYNTAX) )
  83     {
  84         // no name for this colour; return it in CSS syntax
  85         colName.Printf(wxT("rgb(%d, %d, %d)"),
  86                        Red(), Green(), Blue());
  87     }
  88     else if ( colName.empty() && (flags & wxC2S_HTML_SYNTAX) )
  89     {
  90         // no name for this colour; return it in HTML syntax
  91         colName.Printf(wxT("#%02X%02X%02X"),
  92                        Red(), Green(), Blue());
  93     }
  94
  95     // this function always returns a non-empty string
  96     wxASSERT_MSG(!colName.empty(),
  97                  wxT("Invalid wxColour -> wxString conversion flags"));
  98
  99     return colName;
 100 }
 101
 102 wxColour wxColourBase::CreateByName(const wxString& name)
 103 {
 104     return wxColour(name);
 105 }