Re: staff manipulation question

[Thomas Morley]

2015-05-25 15:58 GMT+02:00 Alex Jones <address@hidden>:
> I’m working with a score that has multiple staves that appear and disappear 
> at various points.
>
> I ran into a curious behavior:
>
> I have two staves fro a while, the second has two notes that complete 
> mid-measure so I encoded like this:
>
> \score {
> \new StaffGroup \relative c' {
> \new Staff
> \key f \major
> \time 6/8
> <<
> {
> R2.*2
> e2.~ \pp
> }
> \new Staff \relative c'' {
> \once \set Staff.explicitKeySignatureVisibility = #end-of-line-invisible
> \set midiInstrument = #"violin"
> \once \omit Staff.TimeSignature
> \key d \minor
>
> <g bes,>2.
> << {g~ g8} \\ {f2. ( _\markup{\italic dim.} e8) \pp} >> r8 r r4 r8
> }
>>>
> \break
>
> a8-. \p ^\markup{solo arco} [r16 g-. a8-.] c-. r r
>
> }
> }
>
> However, when the second staff concluded, it didn’t disappear.  I worked out 
> it was because the << >> region wasn’t aligned with a measure break.
>
> So, I replaced with this:
>
> << {g~ g8 b\rest b\rest b4\rest b8\rest} \\ {f2. ( _\markup{\italic dim.} e8) 
> \pp s s s4 s8} >>
>
> however, this was quite clunky.  I had to create rest space in both note 
> groups, and then I had to reposition the rests in the top note grouping to 
> apply to both voices.  Aside from the staff not disappearing, the top 
> solution works well.
>
> Is there a more streamlined way to do this?
>
> Using lilypond 2.18.2
>
> -akj



Not sure what's causing this.
2.14.2 behaves as you would expect (after adjusting your code to that
ancient version)

Anyway, try to add:

\layout{
  \context {
    \Staff
    \RemoveEmptyStaves
    \override VerticalAxisGroup.remove-first = ##t
  }
}

Cheers,
  Harm