Tikz figures not centred

[Michael Murphy <michael.murphy@uni-ulm.de>]

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Hi,

I've been having some problems with tikz figures. When I define a new
tikz figure, I normally put it in a buffer:

\startbuffer[mypic]
	\starttikzfigure
		...
	\stoptikzfigure
\stopbuffer

which I use later when I place the figure

\placefigure{My picture}{\getbuffer[mypic]}

The problem is that the figure is not centred: it is always aligned with
the left side of the document. I guess this has something to do with
Context not being able to get the image bounds, since it works fine for
tikz images that are already precompiled into PDFs:

\placefigure{My picture}{\externalimage[mypic.pdf]}

Minimal example is attached.

Michael.

-- 
Michael Murphy <michael.murphy@uni-ulm.de>
University of Ulm

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\usemodule[tikz]

\starttext

\startbuffer[tikz-picture]
  \starttikzpicture
    \fill[red] (0,0) circle (2);
  \stoptikzpicture
\stopbuffer

\placefigure{A tikz figure}{\getbuffer[tikz-picture]}

\placefigure{Another tikz figure}{
  \starttikzpicture
    \fill[red] (0,0) circle (2);
  \stoptikzpicture
}

\placefigure{An external tikz figure}{
  \externalfigure[tikzfig.pdf]
}

\stoptext

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