Misbehaving flow charts

[Marco Patzer <homerow@lavabit.com>]

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Hi,

I have a few questions regarding flow charts.

1) Setting “offset=none” yields to “Missing number, treated as zero.”
2) “option=test” should display a grid according to the manual, but
   it doesn't. It only displays the anchors.
3) What does the maxwidth option do?
4) What are the options “x” and “y” for?

I'd like to set  the width of the cells so that they fit within the
text width. Here is my attempt, but there are several issues.

\usemodule [chart]

\setupFLOWcharts
  [width=37mm,
   dx=1cm,
   offset=-1cm]

\showframe
\starttext
  \startFLOWchart [foo]
    \dorecurse{3}{
      \startFLOWcell
        \location   {\recurselevel,1}
        \expanded{\text {Foo \recurselevel}}
      \stopFLOWcell}
  \stopFLOWchart
  \FLOWchart [foo]
\stoptext

The width is set manually to 37mm, which is ugly and not exact. To
get rid of the inter cell space I used a negative offset, which
clips the cell frame. How do I

5) set the width of the entire chart to \textwidth,
6) get rid of the left and right cell distance without clipping the
   frame?

Using a table it's simple to set up BTW:

\showframe
\starttext
\bTABLE [width=broad, distance=2cm, align=middle, rulethickness=2pt]
  \bTR \bTD Foo 1\eTD
       \bTD Foo 2\eTD
       \bTD Foo 3\eTD \eTR
\eTABLE
\stoptext

Marco

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