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