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2.8.3 Graphical notation
Rhythmic items may be continued by a duration line, which gets represented by a
DurationLine grob.
Possible styles are 'beam, 'line, 'dashed-line,
'dotted-line, 'zigzag, 'trill and 'none.
The duration line may end with a hook (beam-style only) or an arrow.
\layout {
\context {
\Voice
\consists "Duration_line_engraver"
\omit Stem
\omit Flag
\omit Beam
\override NoteHead.duration-log = 2
}
}
{
a'1\- s2 r
\once \override DurationLine.style = #'line
a'1\- s2 r
\once \override DurationLine.style = #'dashed-line
\once \override DurationLine.dash-period = 2
a'1\- s2 r
\once \override DurationLine.style = #'dotted-line
\once \override DurationLine.dash-period = 1
\once \override DurationLine.bound-details.right.padding = 1
a'1\- s2 r
\once \override DurationLine.thickness = 2
\once \override DurationLine.style = #'zigzag
a'1\- s2 r
\once \override DurationLine.style = #'trill
a'1\- s2 r
\once \override DurationLine.style = #'none
a'1\- s2 r
\once \override DurationLine.bound-details.right.end-style = #'arrow
a'1\- s2 r
\override DurationLine.bound-details.right.end-style = #'hook
a'1\- s2 r
\override DurationLine.details.hook-direction = #DOWN
a'1\- s2 r
\bar "|."
}
Known issues and warnings
If a DurationLine grob runs to the very end of a score, ending items are
not printed for technical reasons.
A workaround would be:
\layout {
\context {
\Voice
\consists "Duration_line_engraver"
\omit Stem
\omit Flag
\omit Beam
\override NoteHead.duration-log = 2
}
}
lastEndStyle =
#(define-music-function (end-style)(symbol?)
#{
\override DurationLine.after-line-breaking =
#(lambda (grob)
(let* ((orig (ly:grob-original grob))
(siblings (if (ly:grob? orig)
(ly:spanner-broken-into orig) '()))
(last-grob (if (pair? siblings) (last siblings) #f)))
(if last-grob
(ly:grob-set-nested-property!
last-grob
'(bound-details right-broken end-style) end-style))))
#})
{
\once \override DurationLine.bound-details.right.end-style = #'arrow
\lastEndStyle #'arrow
a'1\-
\bar "|."
}