Tikz/pgf colour issue

Tikz/pgf colour issue

[Felix Ingram]

I just upgraded to the latest beta in order to see if that would fix
my header styling issue. Compiling gave me the following error:

! Argument of \pgfutil@context@parse@gray has an extra }.

This is defined in:
tex\texmf-modules\tex\generic\pgf\utilities\pgfutil-context.def

If I change the code to the following (basically just comment out the
call to \pgfutil@context@parse@gray) then my document will compile
again. That's about my debugging limit - I shall stare at the code a
bit more to see if inspiration strikes.

% The cmyk part is from Joseph Wright.
% See tex.stackexchange.com/questions/27952/cmyk-context-colors-in-tikz
\def\pgfutil@registercolor#1{%
  \edef\pgf@temp{\PDFcolor{#1}}%
  \edef\pgf@marshal{\noexpand\pgfutil@in@{g}{\pgf@temp}}%
  \pgf@marshal
  %\ifpgfutil@in@
    %\expandafter\pgfutil@context@parse@gray\pgf@temp\pgf@stop{#1}%
  %\else
    \edef\pgf@marshal{\noexpand\pgfutil@in@{rg}{\pgf@temp}}%
    \pgf@marshal
    \ifpgfutil@in@
      \expandafter\pgfutil@context@parse@rgb\pgf@temp\pgf@stop{#1}%
    \else
      \edef\pgf@marshal{\noexpand\pgfutil@in@{k}{\pgf@temp}}%
      \pgf@marshal
      \ifpgfutil@in@
        \expandafter\pgfutil@context@parse@cmyk\pgf@temp\pgf@stop{#1}%
      \else
        \PackageError{pgf}{Color #1 has an unsupported color model.}{}%
        \pgfutil@definecolor{#1}{gray}{0}%
      \fi
    \fi
  %\fi
}

Regards,

Felix
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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Re: Tikz/pgf colour issue

[Felix Ingram]

Further investigation suggests that this is a known issue of using
\definecolor colours within a Tikz graphic that decided to manifest
itself for the first time when I upgraded.

The solution is to do:
\unprotect
\pgfutil@definecolor{colour_name}{rbg/cmyk/gray}{...colour values...}
\protect

for all the colours that you want to use.

Apologies for the noise.

Felix
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________