PGF and definecolor

PGF and definecolor

[Flavien Lambert]

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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

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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Re: PGF and definecolor

[Hans Hagen]

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.
> 
> 
> 
> ------------------------------------------------------------------------
> 
> ___________________________________________________________________________________
> 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  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________


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___________________________________________________________________________________
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  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________