Hi Jan-Peter
Am 02.05.2017 um 11:10 schrieb Jan-Peter Voigt:
> Hi Urs,
>
> Am 02.05.2017 um 10:53 schrieb Urs Liska:
> > ...
>> What I did *not* manage yet is at the end of the thing.
>> When I use
>>
>> test =
>> #(define-music-function (mus)(ly:music?)
>> #{
>> <>\startGroup
>> #mus
>> <>\stopGroup
>> #})
>>
>> {
>> \test { c' d' e' f' } g' a' b' c'
>> }
>>
>> the bracket includes the g' - or rather the zero-length chord
>> immediately before it.
>>
>> Do you have any suggestion how to do *this* in a convenient manner, i.e.
>> without splitting #mus into pieces and insert the \stopGroup before the
>> last element?
>
> this *is* kind of splitting the music, but just to show, where the
> closing articulation "NoteGroupingEvent" should be placed:
>
> \version "2.19.57"
>
> test =
> #(define-music-function (mus)(ly:music?)
> (let* ((elms (ly:music-property mus 'elements))
> ; first and last music-element ...
> (frst (first elms)) ; TODO test for list? and ly:music?
> (lst (last elms)) ; TODO test for list? and ly:music?
> (fartic (ly:music-property frst 'articulations '())) ; look
> for eventchords ...
> (lartic (ly:music-property lst 'articulations '()))
> )
> (ly:music-set-property! frst 'articulations `(,@fartic
> ,(make-music 'NoteGroupingEvent 'span-direction -1)))
> (ly:music-set-property! lst 'articulations `(,@lartic
> ,(make-music 'NoteGroupingEvent 'span-direction 1)))
> #{
> #mus
> #}))
>
> \new Staff \with {
> \consists "Horizontal_bracket_engraver"
> } {
> \test { c' d' e' f' } g' a' b' c''
> }
>
>
> HTH
Yes, it does. I don't think there's an even more straightforward
solution (like the <> for the first element) to this. I successfully
integrated it into my code.
But what would be the cases where the element is a list? instead of
ly:music? And what does the "eventchords" comment refer to?
Best
Urs
> Jan-Peter
>
>
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