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Fwd: Possible bug: MMRs and keepAliveInterfaces
From: |
Saul Tobin |
Subject: |
Fwd: Possible bug: MMRs and keepAliveInterfaces |
Date: |
Tue, 12 Mar 2019 20:59:31 -0700 |
Originally posted to user list by mistake, sorry for doublepost to anyone
who follows both.
If any of the interfaces for MultiMeasureRests (e.g. rest-interface,
spanner-interface, multi-measure-rest-interface) are included in
keepAliveInterfaces (useful if you want to condense some systems in a
score, but not others), then when an MMR occurs on either side of a system
break it can cause staves to be kept alive that otherwise should be removed
due to keepAliveInterfaces = #'().
\version "2.19.82"
\layout {
\context {
\Score
keepAliveInterfaces = #'(stem-interface
note-head-interface
rest-interface
)
}
}
% Ex 1
\new Staff \with {
\override VerticalAxisGroup.remove-empty = ##t
\override VerticalAxisGroup.remove-first = ##t
} {
R1
\set Staff.keepAliveInterfaces = #'()
\break
c'1
}
% Ex 2
\new Staff \with {
\override VerticalAxisGroup.remove-empty = ##t
\override VerticalAxisGroup.remove-first = ##t
} {
\set Staff.keepAliveInterfaces = #'()
c'1
\unset Staff.keepAliveInterfaces
\break
R1
}
Is this a bug? Am I missing something about the intended behavior of MMRs?
Ideas for workarounds or fixes?
Thanks!
Saul
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