Re: Box around system

[Jean Abou Samra]

Le 15/05/2022 à 10:40, Rip _Mus a écrit :
> Good morning,
> I found this interesting snippet:
> https://lsr.di.unimi.it/LSR/Snippet?id=257
>
> that draws a box around systems.
> According to you, is it possible to specify box line thickness ?
>
> Thank you!
>
> Rip_mus



It looks like box-grob-stencil does not support this. make-stencil-boxer, on
the other hand, does. It expects a callback yielding a stencil, though,
so you need to define a little function returning a stencil empty of
inking with the grob's extent.

\version "2.22.2"

#(define (empty-stencil-from-grob-extents grob)
   (ly:make-stencil
    '()
    (ly:grob-extent grob grob X)
    (ly:grob-extent grob grob Y)))

\layout {
  \context {
    \Score
    \override System.stencil =
      % adjust thickness and padding
      #(make-stencil-boxer 0.2 0.3 empty-stencil-from-grob-extents)
  }
}

{
  \slurDown c4 ( g4  c''4)
}


Best,
Jean