Hi Mojca,
On Tue, Jul 26, 2016 at 7:44 AM, Mojca Miklavec
<[email protected]> wrote:
> To summarise again: I want to add button numbers (and optional finger
> numbers) on top of pitches (usually one to three buttons at the same
> time) to aid diatonic accordion players.
>
> Following David's advice I'm currently misusing the lyrics for that.
> But apart from a bug in vertical alignment when the "first syllable"
> in the top row is missing (the only workaround I found so far was to
> use "-" as the first syllable instead of an empty space), there's
> another problem that I just discovered.
>
> Namely, when one chord is played with more buttons/fingers than other
> chords inside the same "bar", LilyPond tries to be smart and aligns
> the top positions towards other chords where there is presumably more
> space. But at the end this looks ugly.
>
Frankly, this looks like a bug. It seems that the property
'self-alignment-X is not always respected.
For testing, I added a callback which prints the X-offset values of
the LyricText grobs. (This should reflect whatever self-alignment-X
setting is in place; default is CENTER).
Callback:
\layout {
%ragged-right = ##f
\context {
\Lyrics
%\override LyricText.self-alignment-X = #LEFT
\override LyricText.after-line-breaking =
#(lambda (grob)
(format #t "~a shift: ~a~%"
(markup->string (ly:grob-property grob 'text))
(ly:grob-property grob 'X-offset)))
}
}
Here's what I get:
3 B4 shift: 0.0
2 B3 shift: -1.42092227559055
1 B2 shift: -1.42092227559055
A5 shift: 0.0
A4 shift: -0.594124708661417
B4 shift: -0.594124708661417
Same results with ragged-right set to #f.
With self-alignment-X set to LEFT, we get (as expected):
3 B4 shift: 0.0
2 B3 shift: 0.0
1 B2 shift: 0.0
A5 shift: 0.0
A4 shift: 0.0
B4 shift: 0.0
(I'm running 2.19.30 at the moment.)
As far as a workaround, you could define a single Lyrics context with
the elements stacked into bottom-aligned columns. Which I think would
be a hassle. Your code should work.
DN
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