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