Hello Harm,

Thanks for your help and thanks a lot to David for supplying this useful Scheme 
code. I’ll use that for sure!

JM

> Le 31 mars 2018 à 16:16, Thomas Morley <thomasmorle...@gmail.com> a écrit :
> 
> 2018-03-30 18:25 GMT+02:00 Menu Jacques <imj-...@bluewin.ch 
> <mailto:imj-...@bluewin.ch>>:
>> Hello,
>> 
>> I’ve nearly reached my goal. Further attempts lead me to the following, 
>> using a GrandStaff and:
>> 
>>        \override GrandStaff.SpanBar.glyph-name = "|"
>>        \override Staff.BarLine.glyph-name = "'"
>> 
>> I can’t obtain a vertical short line at the left and right ends of the 
>> spanner yet though, since:
>> 
>>        \override AccordionPushSpanner.bound-details.left.text =
>>                \markup { \draw-line #'(0 . -3) }
>>        \override AccordionPushSpanner.bound-details.right.text =
>>                \markup { \draw-line #'(0 . 3) }
>> 
>> don’t make a change. That would be useful it seems.
>> 
>> Also, the thick parts of the repeat barlines don’t go down to the lower 
>> stave, but that is maybe less useful. Maybe diatonic accordion players on 
>> this list can comment on that. For the others, let’s mention that a thick 
>> line means « push » and that its absence means « draw ».
>> 
>> The next important step will be to convert the actual note pitches into the 
>> fingerings that should be displayed instead.
>> 
>> JM
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>>> Le 27 mars 2018 à 13:16, Menu Jacques <imj-...@bluewin.ch 
>>> <mailto:imj-...@bluewin.ch>> a écrit :
>>> 
>>> Hello folks,
>>> 
>>> I've modified the AccordionPushSpanner example supplied by someone on this 
>>> list (can't find who it was, unfortunately), giving the attached file and 
>>> the score :
>>> 
>>> <PastedGraphic-4.tiff>
>>> How can I tune the settings to align the bar lines lower tips with the 
>>> single staff line, and hide the dots in the repeat bar lines, in a way 
>>> similar to:
>>> 
>>> <Diatonic look.png>
>>> The small vertical lines would be nice to have too.
>>> 
>>> Thanks for your help!
>>> 
>>> JM
>>> 
>>> <AccordionPushSpannerExample.ly <http://accordionpushspannerexample.ly/>>
>>> 
> 
> Hi,
> 
> the original coding is by David Nalesnik
> https://lists.gnu.org/archive/html/lilypond-user/2016-07/msg00541.html 
> <https://lists.gnu.org/archive/html/lilypond-user/2016-07/msg00541.html>
> 
> Attached you'll find a revised version and an example. I recommend to
> read the changelog in accordion.ily
> 
> To adjust the BarLines I'd simply set bar-extent to '(0 . 0) in the lower 
> Staff.
> 
> 
> HTH,
>  Harm
> <accordion.ily><example-2.ly><example-2.png>

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