How to create a thick horizontal line (as its own staff)?

[Mojca Miklavec]

Hi,

Following the example to create scores for diatonic accordion as
posted recently by David:

http://lilypond.org/doc/v2.18/Documentation/snippets/templates#templates-score-for-diatonic-accordion

I would like to get a better understanding of how
    \staffTabLine
is created and how it could be improved.


I would like to have:

- a thick horizontal line for "push" and nothing at all on "pull", no
vertical lines

- it should start and stop at the vertical bar (if the push/pull stops
at '|', otherwise "cover the appropriate durations" below the pitches)

- probably something like \startPush to start the thick line, then
perhaps specify the duration with something like "s1 s1", followed by
\startPull that would disable
(It would be soooooo much better if \startPush and \startPull could be
placed in the first staff with melody, between the pitches, so that
one wouldn't have to think twice about the proper duration of that
thick line.)

- the vertical position should be somewhere below the lyrics

See the attached PNG.

I would be very grateful for some directions ...

Thank you very much,
    Mojca

(Please CC me.)

cebelice.png
Description: PNG image