On 24-7-2012 12:52, Marco wrote:
Hi,
this seems like a bug in the MetaFun or column set code. Printing a
vertical rule between columns fails with
! terminal: >> NOfTextColumns-1
! Improper final value has been replaced by 0.
<to be read again>
The code also fails, when the column set code is commented out, but
then the NOfTextColumns doesn't make sense any longer. Older betas
work perfectly.
\startuseMPgraphic{verticalline}
for i=1 upto NOfTextColumns-1 :
draw (rightboundary TextColumns[i]) shifted (2.5mm,0) shifted
-\MPxy\textanchor;
endfor ;
setbounds currentpicture to OverlayBox ;
\stopuseMPgraphic
that (experimental) mechanism has been removed (maybe something else get
in place, like regions we have already elsewhere)
\defineoverlay [verticalline] [\useMPgraphic{verticalline}]
\setupbackgrounds [text] [background=verticalline]
\definecolumnset [example] [n=2]
\starttext
\startcolumnset [example]
\input knuth
\stopcolumnset
\stoptext
I've added two column state variables to mp:
\startuseMPgraphic{verticalline}
if CurrentColumn < NOfColumns :
draw rightboundary OverlayBox shifted (2.5mm,0) ;
setbounds currentpicture to OverlayBox enlarged 2.5mm;
fi ;
\stopuseMPgraphic
\definecolumnset [example] [n=3,background=verticalline,distance=5mm]
\defineoverlay [verticalline] [\useMPgraphic{verticalline}]
\starttext
\startcolumnset [example]
\input knuth
\input knuth
\input knuth
\input knuth
\stopcolumnset
\stoptext
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