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List:       lilypond-user
Subject:    Re: All grobs at a given time/in a note column in all or certain contexts
From:       Klaus Blum <BenBigNoise () gmx ! de>
Date:       2019-10-24 17:21:24
Message-ID: 1571937684711-0.post () n5 ! nabble ! com
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Hi Urs, 

Urs Liska-3 wrote
> is it possible from either a music function or a callback or an engraver
> to get to all the grobs in a certain note column, either across the whole
> score or within specific contexts?

a few years ago, David Nalesnik wrote an interesting engraver: 
http://lilypond.1069038.n5.nabble.com/box-around-notes-td35581.html
<http://lilypond.1069038.n5.nabble.com/box-around-notes-td35581.html>  

IIUC, it iterates through all grobs inside a music expression to determine
the dimensions of a box around it. 

I learned a lot from that thread, but most of the magic there is far beyond
anything I can understand.  :(
But maybe it's helpful for you... 

Cheers, 
Klaus




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