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From: Hans Hagen <pragma@wxs.nl>
Newsgroups: gmane.comp.tex.context
Subject: Re: float over both text and margin
Date: Mon, 12 Dec 2005 19:06:13 +0100
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Vit Zyka wrote:

> Hi.
>
> 1) I am unsuccessfully solving the problem of making float spanning 
> both text and margin. More over, it is inside columnset... Example 
> follows. Is there some solution?


or maybe:


\def\dogetfloat
  {\ifsomefloatwaiting
     \global\setbox\floatlist\vbox
       {\unvbox\floatlist
        \global\setbox\globalscratchbox\lastbox}%
     \ifcenterfloatbox
       \ifdim\wd\globalscratchbox<\hsize
         \setbox\floatbox\hbox to \hsize{\hss\box\globalscratchbox\hss}%
       \else
         \setbox\floatbox\box\globalscratchbox % local !
\ifinsidecolumns
    % retain special alignments
    \ifdim\wd\floatbox>\makeupwidth
        \wd\floatbox\makeupwidth
    \fi
\fi
       \fi
     \else
       \setbox\floatbox\box\globalscratchbox % local !
     \fi
     \global\advance\savednoffloats \minusone
     \ifcase\savednoffloats
       \global\somefloatwaitingfalse
     \fi
   \else
     \global\savednoffloats\zerocount
     \global\setbox\floatbox\box\voidb@x
   \fi}