[NTG-context] Are positional graphics still working?

Hans Hagen j.hagen at xs4all.nl
Wed Feb 17 12:09:16 CET 2021


On 2/17/2021 12:18 AM, Jairo A. del Rio wrote:
> I've copied the following example from the ConTeXt archive:
> 
> \defineoverlay[frames][\positionoverlay{frames}]
> 
> \setupbackgrounds[text][background=frames]
> 
> 
> \startMPpositiongraphic{frame}
> 
> if unknown context_apos : input mp-apos.mpiv ; fi ;
> 
> \MPgetposboxes{\MPvar{self}}{\MPanchorid}
> 
> if nofposboxes = 1 :
> 
> draw posboxes[1] ;
> 
> fi ;
> 
> \stopMPpositiongraphic
> 
> 
> \startpositionoverlay{frames}
> 
> \setMPpositiongraphic{one}{frame}
> 
> \setMPpositiongraphic{two}{frame}
> 
> \stoppositionoverlay
> 
> 
> \starttext
> 
> This \hpos{one}{word} should be \hpos{two}{framed}.
> 
> \stoptext
> 
> Frames are misplaced, so I don't know if that's a bug or something else 
> has been updated/changed/deprecated. Thank you in advance.
As a step-up to further integrated (more lmtx-ish) support for this the 
next upload will have this:

\defineoverlay[frames][\positionoverlay{frames}]

\setupbackgrounds[text][background=frames]

\startMPpositiongraphic{frame}
     getposboxes("self","anchor") ;
     if nofposboxes = 1 :
         draw posboxes[1] ;
     fi ;
\stopMPpositiongraphic

\startpositionoverlay{frames}
     \setMPpositiongraphic{one}{frame}
     \setMPpositiongraphic{two}{frame}
\stoppositionoverlay

\starttext
     This \hpos{one}{\strut word} should \hpos{two}{\strut also be framed}.
\stoptext

Hans


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