Re: BarNumber.whiteout over StaffGroup vertical lines

[Thomas Morley]

Am Mi., 31. Okt. 2018 um 19:09 Uhr schrieb Pierre-Luc Gauthier
<address@hidden>:
>
> Hi there,
>
> Not sure if this is a bug or if I am using it wrong.
>
> I've started using :
> \consists "Mark_engraver"
> \consists "Bar_number_engraver"
> , etc
> inside StaffGroups since it is now working.
> (Fixed with I think 622cab6a34 (Thanks to Dan Eble))
>
> But I get a strange and inconsistent result with whiteouts of the
> Bar_number_engraver.
> The two images I've attached to this email are from a 400+ measures
> score. Sometimes the bar number is in front of the vertical system
> line and sometimes it is behind. I have not figured out what is
> different in each case as it pops-up rather anywhere.
>
> But! I have managed (by error) to "trigger" the behavior in the
> following MWE might you {un,}comment line 4.
>
> \version "2.21.0"
>
> music = \repeat unfold 7 {c'4}
> %music = \repeat unfold 8 {c'4}
>
> \score {
>   <<
>     {s1 \break}
>     \new StaffGroup \music
>     \new StaffGroup \music
>   >>
>   \layout {
>     \override Score.BarNumber.self-alignment-X = #CENTER
>     \override Score.BarNumber.whiteout = #4
>     \context {
>       \Score
>       \remove "Bar_number_engraver"
>     }
>     \context {
>       \StaffGroup
>       \consists "Bar_number_engraver"
>     }
>   }
> }
>
> Should a bug report be filed?
>
> Thanks
> --
> Pierre-Luc Gauthier

Probably, BarNumber and SystemStartBar have the same layer. Try adding
  \override BarNumber.layer = 200
to StaffGroup-context.

Cheers,
  Harm