On Mon, 18 Feb 2008, Jesse Alama wrote:
> Hi Aditya,
>
> Thanks for the help -- I think I now see why there is such trouble with
> colors in pgf and context. It looks like one can systematically
> transform LaTeX-like PGF examples of \color into ConTeXt examples.
>
> The reason why this came up is that I'm trying to go through Till
> Tantau's "Example for Karl's Students" tutorial in the PGF/TikZ manual.
> Has anyone managed to ConTeXt-ify that example?
I did that some time back while testing tikz. I will send that file as a
reply to this email, since I am not sure if it will go through the mailing
list because of its size.
> The example features some \definecolor's which I just did away with
> (sadly) by simply substituting their defining values for their
> occurences. (This is unfortunate, but perhaps necessary until some
> other mechanism is produced.) The problem is that the text box to the
> right of the picture is supposed to be colored, and with rounded
> corners. But the box is missing. Look at p. 20 of
The TikZ manual make a lot of uses of the xcolor syntax (e.g.
\color{red!20}). There is no equivalent ConTeXt syntax. You need to define
a color, say lightred, as follows
\definecolor[lightred][r=0.2]
For tikz key-value options, pgf works behind the scene to define
appropriate colors, so xcolor syntax works for them. So
\fill[fillcolor=red!20] will work as expected. However, when using \color
inside any box, you need to follow ConTeXt syntax. So \color[red!20] will
not work, you need to define a context color and then use that.
Hope that this clarifies some things.
Aditya
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