Re: Time signatures above score, aligning short instrument names

[Jean Abou Samra]

Le 08/11/2022 à 23:47, Nate Whetsell a écrit :
> Thank you for this! I’m not sure how it works—it looks like a Scheme 
> engraver that changes the /x/ parent of some time signatures—but it 
> sure does! 


Yes, that's it. Basically, in order to make TimeSignature support alignment
via break-align-symbols, you need to make it similar to a 
break-alignable item
(like RehearsalMark, MetronomeMark, TextMark, etc.) instead of a 
break-aligned
item (like Clef, normal TimeSignature, KeySignature, etc.). The callback
that does the alignment with break-align-symbols searches for the grobs
to align to in the time signature's X parent, if it's a BreakAlignment. But
if you set break-align-symbol to ##f (to avoid unconditional alignment with
other time signatures), by default the parent is the BreakAlignment's own
X parent, the NonMusicalPaperColumn. Hence the need for this little 
engraver.

The alternative would have been reimplementing alignment with 
break-align-symbols,
which is not all that complicated either.

Best,
Jean

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