On Thu, Oct 14, 2010 at 11:05 AM, Emanuele Sacco
<emanuelesa...@gmail.com> wrote:
> Hi all,
>
> I'm using context MkII.
> My code is
>
>
> \setupcolors[state=start]
> \setupbackground
> [bottomframe=on,
> rulethickness=1pt,
> rightframe=on,
> leftframe=on]
>
> \starttext
> Good:
> \startbackground
> \input knuth
> \stopbackground
>
> Not good:
>
> \startbackground
> \input knuth
> \input knuth
> \input knuth
> \stopbackground
> \stoptext
>
>
>
> The second backgrounded text is on two pages. Is there a way to not
> show the bottomframe at the end of the first page?
> thanks
>
> ES
> --
> Al mondo ci sono 10 tipi di persone: quelli che conoscono il sistema
> binario e quelli che non lo conoscono.
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the 
> Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>

As always  my pov: a wrapper macro.

\showframe
\newdimen\SpaceLeft
\def\CheckSpace{%
\ifdim\pagetotal=0pt\SpaceLeft=\vsize\else\SpaceLeft=\pagegoal\advance\SpaceLeft
 by -\pagetotal\advance\SpaceLeft by -2\lineheight\fi}%


\setupcolors[state=start]


\long\def\StartBg#1\StopBg{%
\bgroup
\setbox8000=\vbox{#1}
\CheckSpace% \the\SpaceLeft\the\ht8000 \the\dp8000
\ifdim\dimexpr(\ht8000+\dp8000)>\SpaceLeft\relax
%
\setbox8001=\vsplit8000 to \SpaceLeft%
\setbox8001=\vbox{\unvbox8001}%
%
\setupbackground
[bottomframe=off,
rulethickness=1pt,
rightframe=on,
leftframe=on]
\startbackground\unvbox8001\stopbackground%

\setupbackground
[bottomframe=on,
rulethickness=1pt,
rightframe=on,
leftframe=on]
\startbackground\unvbox8000\stopbackground%
\else
\setupbackground
[bottomframe=on,
rulethickness=1pt,
rightframe=on,
leftframe=on]
\startbackground #1\stopbackground%
\fi
\egroup
}

\setupbackground
[bottomframe=on,
rulethickness=1pt,
rightframe=on,
leftframe=on]

\starttext
Good:
\startbackground
\input knuth
\stopbackground

Not good:

\StartBg
\input knuth
\input knuth
\input knuth
\StopBg

\stoptext



-- 
luigi
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

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