Am Mo., 1. Nov. 2021 um 15:35 Uhr schrieb Kieren MacMillan <kieren_macmil...@sympatico.ca>: > > Hi all, > > Having struggled with this for almost a decade (see, e.g., > https://lists.gnu.org/archive/html/lilypond-user/2013-03/msg00314.html)… Is > this something that could be handled really well with an engraver? Or at > least a bunch of helpful syntactic sugar? Surely all of this manual work > (offset, calculate height, etc.) can be automagically handled…? > > I’d love to pursue A Real Solution™ for this problem, if anyone out there is > interested in collaborating with me. > > Cheers, > Kieren. > ________________________________ > > Kieren MacMillan, composer (he/him/his) > ‣ website: www.kierenmacmillan.info > ‣ email: kie...@kierenmacmillan.info > >
Hi Kieren, attached code hacks Instrument.Y-offset. This is a proof of concept, please test thoroughly before using it in serious work. Cheers, Harm
\version "2.23.3"
%% Set 'stencil as side-effect from 'Y-offset
%% A hack ...
#(define-public ((system-start-text::calc-y-offset-harm stencil-proc) grob)
(define (live-elements-list me)
(let ((elements (ly:grob-object me 'elements)))
(filter! grob::is-live?
(ly:grob-array->list elements))))
(let* ((left-bound (ly:spanner-bound grob LEFT))
(live-elts (live-elements-list grob))
(system (ly:grob-system grob))
(extent empty-interval))
(if (and (pair? live-elts)
(interval-sane? (ly:grob-extent grob system Y)))
(let get-extent ((lst live-elts))
(if (pair? lst)
(let ((axis-group (car lst)))
(if (and (ly:spanner? axis-group)
(equal? (ly:spanner-bound axis-group LEFT)
left-bound))
(set! extent (add-point extent
(ly:grob-relative-coordinate
axis-group system Y))))
(get-extent (cdr lst)))))
;; no live axis group(s) for this instrument name -> remove from system
(ly:grob-suicide! grob))
(if (procedure? stencil-proc)
(let* ((staff-space (ly:staff-symbol-staff-space grob))
;; `extend' is from top zero-line to bottom zero-line
(widened-extent
(interval-widen extent (* 2 staff-space)))
(y-length (interval-length widened-extent))
(custom-stencil (stencil-proc y-length grob)))
(if (ly:stencil? custom-stencil)
(ly:grob-set-property! grob 'stencil
(ly:stencil-add
(ly:stencil-translate-axis
(ly:stencil-rotate
(grob-interpret-markup grob
(ly:grob-property grob 'long-text))
90 0 0)
;; hmmm, hardcoded
-6
X)
custom-stencil)))))
(+
(ly:self-alignment-interface::y-aligned-on-self grob)
(interval-center extent))))
#(define boolean-or-procedure?
(lambda (x) (or (procedure? x)(boolean? x))))
groups =
#(define-scheme-function (proc)(boolean-or-procedure?)
#{
\override InstrumentName.Y-offset =
#(system-start-text::calc-y-offset-harm proc)
#})
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXAMPLE
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Example stencils, we always need `y-length' and `grob'
#(define (bracket-stencil y-length grob)
(ly:stencil-translate-axis
(centered-stencil
(make-connected-path-stencil
(list '(1 0) '(0 0) (list 0 y-length) (list 1 y-length))
0.1 1 1 #f #f))
;; TODO why 0.75?
0.75 Y))
#(define (brace-stencil y-length grob)
(ly:stencil-translate-axis
(centered-stencil
(grob-interpret-markup
grob
;; TODO why `5' ?
(make-left-brace-markup (* 5 y-length))))
;; TODO why 0.75?
0.75 Y))
%% Some score
<<
\new Staff
\with { instrumentName = "Piccolo " }
{ R1 \break R }
\new StaffGroup
\with {
\groups #bracket-stencil
instrumentName = "Flutes"
}
<<
\new Staff
\with {
\groups ##f
instrumentName = "I"
\override VerticalAxisGroup.staff-staff-spacing.padding = 10
}
{ R1 \break R }
\new Staff
\with {
\groups ##f
instrumentName = "II"
}
{ R1 \break R }
\new Staff
\with {
\groups ##f
instrumentName = "III"
}
{ R1 \break R }
>>
\new Staff
\with { instrumentName = "Timpani " }
{ R1 \break R }
\new GrandStaff
\with {
\override InstrumentName.Y-offset =
#(system-start-text::calc-y-offset-harm brace-stencil)
instrumentName = "Violins"
}
<<
\new Staff
\with {
\groups ##f
instrumentName = "I"
\override VerticalAxisGroup.staff-staff-spacing.padding = 15
}
{ R1 \break R }
\new Staff
\with {
\groups ##f
instrumentName = "II"
}
{ R1 \break R }
>>
>>
instrument-group-brackets-01.pdf
Description: Adobe PDF document
