[NTG-context] PGF and definecolor

Hans Hagen pragma at wxs.nl
Thu Feb 14 14:40:24 CET 2008


Flavien Lambert wrote:
> Dear all, I am a newbie in ConTeXt. I am accustomed to use pgf in LaTeX and
> have seen that pgf is also a module for ConTeXt. When using some of my pgf
> macros in ConTeXt, I had several erros coming from the fact that colors are
> defined by the "same" command in both pgf and ConTeXt, namely
> \definecolor[mycolor][r=,g=,b=] in ConText and
> \definecolor{mycolor}{rgb}{,,} in pgf.
> It seems to me impossible to use the pgf command directly and, in the same
> time, impossible to use ConTeXt-defined color in pgf macros.
> Here is an example :
> \usemodule[pgf]
> \definecolor[mycolor][r=0.5,g=0.5,b=0.5]
> \starttext
> \pgfdeclarehorizontalshading{myshading}{1cm}{%
>   color(0cm)=(mycolor);color(1cm)=(green)}
> \pgfuseshading{myshading}
> \stoptext

hm, maybe ask the author to check if definecolor is defined, and when 
so, use \pgfdefinecolor instead


> There is an error with \definecolor and the shading. If you replace
> (mycolor) by (red) in the shading and suppress the \definecolor, it is fine.
> Best regards.
> 
> 
> 
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