Hi Carl,
On 15.12.2016 23:20, Carl Williams wrote:
I can't quite get my head around the syntax, but all I want to do is
measure if the note is a half-note, and then change the length of that
one accordingly.
you actually got pretty far there! Here’s it with the missing bits inserted:
%%%%%%%%%%%%
\version "2.18.2"
shorten-stems =
#(lambda (grob)
;if note is a half-note,
;then make Stem.length = 15 (value of 15 is just for testing)
(if (= 1 (ly:grob-property grob 'duration-log))
(ly:grob-set-property! grob 'length 15)))
\layout {
\context {
\TabVoice
\override Stem.before-line-breaking = \shorten-stems
}
}
\new TabStaff \with {
stringTunings = #ukulele-tuning
\tabFullNotation
\stemUp
} \relative c' {
\partial 2.. a'8 a4 a2 |
a1 |
}
%%%%%%%%%%%
So:
– Don’t use a music-function, instead assign a procedure with (grob) as
argument – a so-called callback – to one of the properties
before-line-breaking and after-line-breaking.
– Use ly:grob-set-property!
– In Scheme, comments are triggered by ; not %
– For an introduction and very instructive examples on Scheme extending
have a look at the Extending Manual.
HTH, Simon
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