Hello Leszek,
Here is an example from this list.
JM
\version "2.18.1"
\layout {
indent = 0
ragged-right = ##t
\context {
\Staff
\consists "Custos_engraver"
% \override Staff.Custos.stencil = ##f
% \override Staff.Custos.style = ##f
}
}
\relative c' {
d1
\once\override Staff.Custos.style = #ly:custos::print
\break
a'1
\once\override Staff.Custos.stencil = ##f
%\revert Staff.Custos.stencil
%\revert Staff.Custos.style
\break
a'1
\break
g1
\once\override Staff.Custos.style = #ly:custos::print
\break
f1
\break
e1
}
\relative c' {
d1
b1
% \revert Staff.Custos.stencil
% \revert Staff.Custos.style
\once\override Staff.Custos.style = #ly:custos::print
% \override Staff.Custos.style = #ly:custos::print
\break
a'1
% \override Staff.Custos.stencil = ##f
\once\override Staff.Custos.stencil = ##f
\break
f'1
\break
d1
\once\override Staff.Custos.style = #ly:custos::print
\break
c1
\break
b1
}
> Le 22 nov. 2015 à 16:41, Leszek Wroński <elw...@gmail.com> a écrit :
>
> I was delighted to learn that Lilypond allows one to use custodes. I was
> wondering how they really work, namely, how one can, upon a linebreak, check
> what the next pitch is. I have limited Scheme experience. I first tried the
> code for the first example from here:
> http://www.lilypond.org/doc/v2.19/Documentation/notation/typesetting-mensural-music
>
> <http://www.lilypond.org/doc/v2.19/Documentation/notation/typesetting-mensural-music>
> and enclosed it (that is, the part inside "\score { } ") in "\displayMusic{
> }" . But this, while enlightening in some respects, didn't really tell me
> what's going on when the custos is to be displayed. So I downloaded the
> source code, and after grepping found two files of interest: custos.cc and
> custos-engraver.cc . In the latter I found an expression headed by
>
> "void
> Custos_engraver::acknowledge_note_head (Grob_info info)"
>
> (line 83). Could anyone tell me if I'm on the right track? My problem is
> that, while I'm willing to learn, I have a very limited experience with C++
> and with any object programming whatsoever (having spent much time decades
> ago with Turbo Pascal 5 :-)). I'd be very grateful for any pointers regarding
> what happens during a linebreak (and, in general, how one should learn such
> things).
>
> Best regards,
>
> Leszek Wronski.
>
>
> _______________________________________________
> lilypond-user mailing list
> lilypond-user@gnu.org
> https://lists.gnu.org/mailman/listinfo/lilypond-user
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