flowchart strangeness

flowchart strangeness

[Binx Bolling]

Why does the appended context flowchart generate an error? If I uncomment 
the block at the end, it processes without a problem. It seems that problems 
sometimes arise if the last cell is between a \bgroup \egroup pair. I would 
like to enclose some cells that way in order to change attributes.

Thanks,
bb

%output=pdf

\usemodule[chart]
\starttext
\startFLOWchart[cells]

  \startFLOWcell
    \name {A}
    \location{1,1}
    \shape{action}
    \text{Box A}
    \connection[bt]{B}
  \stopFLOWcell
{
  \startFLOWcell
    \name {B}
    \location{1,2}
    \shape{action}
    \text{Box B}
  \stopFLOWcell
}

%  \startFLOWcell
%    \name {C}
%    \location{1,3}
%    \shape{action}
%    \text{Box C}
%  \stopFLOWcell

\stopFLOWchart
\FLOWchart[cells]
\stoptext

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Re: flowchart strangeness

[Hans Hagen]

At 10:38 PM 5/28/2002 +0000, Binx Bolling wrote:
>Why does the appended context flowchart generate an error? If I uncomment 
>the block at the end, it processes without a problem. It seems that 
>problems sometimes arise if the last cell is between a \bgroup \egroup 
>pair. I would like to enclose some cells that way in order to change 
>attributes.
>
>Thanks,
>bb
>
>%output=pdf
>
>\usemodule[chart]
>\starttext
>\startFLOWchart[cells]
>
>  \startFLOWcell
>    \name {A}
>    \location{1,1}
>    \shape{action}
>    \text{Box A}
>    \connection[bt]{B}
>  \stopFLOWcell
>{
>  \startFLOWcell
>    \name {B}
>    \location{1,2}
>    \shape{action}
>    \text{Box B}
>  \stopFLOWcell
>}
>
>%  \startFLOWcell
>%    \name {C}
>%    \location{1,3}
>%    \shape{action}
>%    \text{Box C}
>%  \stopFLOWcell
>
>\stopFLOWchart
>\FLOWchart[cells]
>\stoptext

During a first pass, the dimensions are determined, and this happens 
locally, which means that in this case a 1 by 1 grid is taken; adding the 
third cell kind of obscure this since now the grid is 1 by 3; the solution 
is a small patch in m-chart:

\def\getFLOWlocationA#1,#2\end
   {\ifnum0#1>\FLOWwidth \xdef\FLOWwidth {#1}\fi
    \ifnum0#2>\FLOWheight\xdef\FLOWheight{#2}\fi}

(there are a few more places, but that's not important now)

Hans
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