Re: Typesetting renaissance music

[Alexander Kobel]

On 2015-05-14 05:09, Murray-Luke Peard wrote:
> [...]
> One is to use the Mensurstriche layout, which has bar lines between
> staves but not through them. My preferred option is to move the barline
> up or down if the note is low or high, and split it if the note is in
> the middle.
>
> I've been able to move the barline up and down with the following commands:
>
> upBar = { \override Staff.BarLine #'bar-extent = #'(0.5 . 3) }
> downBar = { \override Staff.BarLine #'bar-extent = #'(-3 . -0.5) }
>
> And reset it to normal with
>
> fullBar = { \override Staff.BarLine #'bar-extent = #'(-2 . 2) }
>
> But I can't figure out how to get the split bar line. Ideally, it would
> look something like :
>
> topPart = { \override Staff.BarLine #'bar-extent = #'(2 . 3) }
> bottomPart = [ \override Staff.BarLine #'bar-extent = #'(-3 . -2) }
>
> but both at the same time!
>
> Can anyone suggest how I might achieve this?


Hi Murray-Luke,

I had the exact same problem a few days ago, in a different context 
(read the thread "TimeSignatures over BarLines" from May 07 here: 
<http://lists.gnu.org/archive/html/lilypond-user/2015-05/msg00276.html>).
The problem is that the BarLine is drawn only once, and the most recent 
extent is taken. There is a solution however: to draw the short BarLine 
twice, and move one of the instances as necessary. The code is as follows:

\once \override Staff.BarLine #'stencil =
#(lambda (grob)
   (ly:grob-set-property! grob 'bar-extent '(-3 . -2))
   (ly:stencil-add
    (ly:bar-line::print grob)
    (ly:stencil-translate-axis (ly:bar-line::print grob) 5 Y)))

If you want two stubs of different length, you have to work a little bit 
harder, but this should get you started.


HTH,
Alexander