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(tmp);   // set from packed long
  61     }
  62     else if (wxTheColourDatabase) // a colour name ?
  63     {
  64         // we can't do
  65         // *this = wxTheColourDatabase->Find(str)
  66         // because this place can be called from constructor
  67         // and 'this' could not be available yet
  68         wxColour clr = wxTheColourDatabase->Find(str);
  69         if (clr.Ok())
  70             Set((unsigned char)clr.Red(),
  71                 (unsigned char)clr.Green(),
  72                 (unsigned char)clr.Blue());
  73     }
  74
  75     if (Ok())
  76         return true;
  77
  78     wxLogDebug(wxT("wxColour::Set - couldn't set to colour string '%s'"), str);
  79     return false;
  80 }
  81
  82 wxString wxColourBase::GetAsString(long flags) const
  83 {
  84     wxString colName;
  85
  86     if (flags & wxC2S_NAME)
  87         colName = wxTheColourDatabase->FindName((const wxColour &)(*this)).MakeLower();
  88
  89     if ( colName.empty() && (flags & wxC2S_CSS_SYNTAX) )
  90     {
  91         // no name for this colour; return it in CSS syntax
  92         colName.Printf(wxT("rgb(%d, %d, %d)"),
  93                        Red(), Green(), Blue());
  94     }
  95     else if ( colName.empty() && (flags & wxC2S_HTML_SYNTAX) )
  96     {
  97         // no name for this colour; return it in HTML syntax
  98         colName.Printf(wxT("#%02X%02X%02X"),
  99                        Red(), Green(), Blue());
 100     }
 101
 102     // this function always returns a non-empty string
 103     wxASSERT_MSG(!colName.empty(),
 104                  wxT("Invalid wxColour -> wxString conversion flags"));
 105
 106     return colName;
 107 }
 108
 109 #if WXWIN_COMPATIBILITY_2_6
 110
 111 // static
 112 wxColour wxColourBase::CreateByName(const wxString& name)
 113 {
 114     return wxColour(name);
 115 }
 116
 117 void wxColourBase::InitFromName(const wxString& col)
 118 {
 119     Set(col);
 120 }
 121
 122 #endif // WXWIN_COMPATIBILITY_2_6