On 26/02/2024 02:04, Garrett Fitzgerald wrote:
I see this has been raised before, and is intentional behavior, but I
just wanted to be clear. When typesetting band marches, I have a
\rehearsalMarks definition that includes double bars as needed. I
define all the parts in a single file (for example, MaineFestival.ly)
and then have multiple part files (MFestClar1.ly) and score files
(MFestScore.ly). In MFestClar1.ly, I will include both \rehearsalMarks
and \clarinetOne, and get the bars as specified. In MFestScore.ly, I
will only include \rehearsalMarks with the \fluteOne staff, and the
bars carry down through all the other staves.
Now, with the advent of \section, I thought I could do this the same
way. It worked fine for the Clar1 part, but when I tried the score, I
found that the \section double bars only appeared in the flute staff
where they were included, and did not carry down to the cornet staff
where I had the actual music that I had put in up to this point.
So, should I basically give up on \section? Should I include it in the
individual parts, instead of relying on the \rehearsalMarks
definition? Or am I missing a point somewhere?
Here is a possible solution. The SectionBcast engraver listens for
section and fine events from the rmarks context and broadcasts them to
other contexts. The staff context for the instruments have another
engraver (SectionRecv) that listens for the broadcasted events and
processes them. You probably want to put the additional code in an
include file for easy reuse.
\version "2.24.2"
%% Put this part in a separate file to be included
#(define (add-context-property symbol type?)
(set-object-property! symbol 'translation-type? type?)
(set-object-property! symbol 'translation-doc "custom context property")
(set! all-translation-properties (cons symbol
all-translation-properties)) symbol)
#(add-context-property 'channel ly:dispatcher?)
SectionBcast =
#(lambda (context)
(make-engraver
((initialize translator)
(let* ((channel (ly:make-dispatcher))
(score (ly:context-find context 'Score)))
(ly:context-set-property! score 'channel channel)))
(listeners
((fine-event engraver event)
(let ((score (ly:context-find context 'Score)))
(ly:broadcast (ly:context-property score 'channel) event)))
((section-event engraver event)
(let ((score (ly:context-find context 'Score)))
(ly:broadcast (ly:context-property score 'channel) event))))))
SectionRecv =
#(lambda (context)
(make-engraver
((initialize translator)
(let* ((score (ly:context-find context 'Score))
(channel (ly:context-property score 'channel)))
(ly:connect-dispatchers (ly:context-event-source context)
channel)))))
\layout {
\context { \Staff \consists \SectionRecv }
}
%% end of include file
rmarks = { s1*2 \mark\default s1*2 \section a1*2 \fine }
flute = { \repeat unfold 6 c''1 }
oboe = { \repeat unfold 6 f'1 }
\score {
<<
\new Devnull \with { \consists \SectionBcast } \rmarks
\new Staff \with { instrumentName="flute" } \flute
\new Staff \with { instrumentName="oboe" } \oboe
>>
}
--
Timothy Lanfear, Bristol, UK.
