On Sun, 14 Feb 2021, Jigé wrote:
> Hi all.
>
> I'm trying to place a TikZ picture in the margin.
> Here is a small example:
>
> \usemodule[tikz]
> \setuplayout[backspace=4cm, topspace=2cm, height=middle]
> \starttext
> \input{lorem}
> \margintext{I have discovered a truly
> marvelous proof ... but
> this margin is too narrow
> to contain it.}
> \input{lorem}
> \inmargin{\externalfigure[cow] [width=\marginwidth]}
> % The above works.
> % The following does not:
> \input{lorem}
> \inmargin{
> \starttikzpicture
> \draw[gray] (-2,0) grid (2,2) ;
> \draw plot [domain=-2:2, samples=50, smooth] (\x,{\x * \x});
> \stoptikzpicture
> }
> \stoptext
>
> -> Undefined control sequence
Most likely because the argument of \inmargin is scanned upfront and at that
time \draw etc are undefined. One option is:
\startbuffer[picture]
\starttikzpicture
...
\stoptikzpicture
\stopbuffer
\inmargin{\getbuffer[picture]}
Another option (but better to do that in tikz module) is:
\let\draw\relax
\let\x\relax
\inmargin{\starttikzpicture ... \stoptikzpicture}
> Actually the command \startmarginblock ... \stop... described in the ConText
> reference works with a TikZ picture.
Because the \start ... \stop blocks don't scan the argument.
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