Re: Displaying StaffGroupBar after tweak

[Jean Abou Samra]

Le vendredi 16 juin 2023 à 15:24 +0200, Jean Abou Samra a écrit :

I don't have the time to find a solution right now, but for a start, here is already a more "M" MWE: [...]

This appears to work better:

\version "2.24.1"

#(define (Workaround_engraver context)
   (let ((bars '())
         (staff-symbol #f)
         (new-staff-symbol #f))
     (make-engraver
      (acknowledgers
       ((staff-symbol-interface engraver grob source-engraver)
        (set! new-staff-symbol grob))
       ((bar-line-interface engraver grob source-engraver)
        (set! bars (cons grob bars))))
      ((stop-translation-timestep engraver)
       (for-each (lambda (bar)
                   (ly:grob-set-object! bar 'staff-symbol (or staff-symbol new-staff-symbol)))
                 bars)
       (when new-staff-symbol
         (set! staff-symbol new-staff-symbol)
         (set! new-staff-symbol #f))
       (set! bars '())))))

kHide = {
  \stopStaff
  \override Staff.StaffSymbol.line-count= 1
  \startStaff
}

\new StaffGroup << 
  \new Staff \with { \consists #Workaround_engraver } { R1 R1 \break \kHide R1 R1 }
  \new Staff { R1 R1 R1 R1 }
>>

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