Urs Liska <u...@openlilylib.org> writes:
>>You can write:
>>
>>#(define-music-function (parser location item)
>> (symbol-list-or-music?)
>> (define (grob-colorize-dir grob)
>> (let ((ev (event-cause grob)))
>> (case (ly:event-property ev 'direction)
>> ((1) red)
>> ((-1) blue)
>> (else '())))))
>> #{ \tweak color #grob-colorize-dir #item #})
>
> Thanks, this works perfectly.
>
> I would like to add this to a Frescobaldi addition and later (once
> 2.18 is out) to a LilyPond addition proposal. Do you have any
> objections?
You can add it wherever you want. I don't see it making any sense as an
addition to LilyPond proper as it is a rather special use case. It may
still be nice as a snippet as it is simple, flexible, and powerful. The
use cases also show \tweak as an internal workhorse for both tweaks and
overrides.
As a snippet, it makes sense _in_ 2.18 as it illustrates current
programming techniques.
--
David Kastrup
_______________________________________________
lilypond-user mailing list
lilypond-user@gnu.org
https://lists.gnu.org/mailman/listinfo/lilypond-user
