Re: horoffset + itemize + positiongraphics = misaligned graphics

[Hans Hagen <pragma@wxs.nl>]

Stuart Jansen wrote:

>I'm working on a rather complex document containing frequent use of
>positional graphics. Unfortunately, I've discovered what I expect will
>be a pretty nasty problem to fix. When I combine horoffset,
>startitemize, & positiongraphics the graphics are placed in the wrong
>spot. I've managed to cook up the simple test case below which
>demonstrates the problem.
>
>===============
>\setuplayout[ horoffset=.5cm ]
>\setuppagenumbering[alternative=doublesided]
>\setupcolors[state=start]
>
>\defineoverlay [backgraphics] [\positionoverlay{backgraphics}]
>\setupbackgrounds[page][background=backgraphics]
>\newcounter\CurrentCallout
>\startMPpositiongraphic{mypos:line}
>  path p ; initialize_box(\MPpos{\MPvar{from}}) ;
>  p := lrxy..urxy..ulxy..cycle ;
>  p := center p shifted (-.5cm,0mm) -- center p ;
>  pickup pencircle scaled 2pt ;
>  drawarrow p withcolor red ;
>  anchor_box(\MPanchor{\MPvar{from}}) ;
>\stopMPpositiongraphic
>\def\myitem%
>{\doglobal\increment\CurrentCallout\item
> \hpos{myitem:b:\CurrentCallout}{\strut}
> \startpositionoverlay{backgraphics}
>  \setMPpositiongraphic{myitem:b:\CurrentCallout}{mypos:line}
> \stoppositionoverlay}
>
>\starttext
>\startitemize[n,serried]
>\dorecurse{30}{\myitem\input tufte }
>\stopitemize
>\stoptext
>  
>

where do you assign a value to "from"?

what effect do you want to achieve?

Hans

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