From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Marco <netuse@lavabit.com>
Subject: Re: Bug with rule between columns in columnset
Date: Tue, 24 Jul 2012 16:32:48 +0200 [thread overview]
Message-ID: <500EB210.1090409@wxs.nl> (raw)
In-Reply-To: <20120724125238.78133616@homerow>
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 Improper final value has been replaced by 0.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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next prev parent reply other threads:[~2012-07-24 14:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-24 10:52 Marco
2012-07-24 14:32 ` Hans Hagen [this message]
2012-07-24 16:10 ` Marco
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