Hi all!
I currently have a function that accesses some grobs through their
"containers"(NoteHeads/Accidentals in NoteColumns, Ties in TieColumns) and
lets me tweak properties (individually if needed) of each. This is done in
a single override so it works with the Edition Engraver. But I've come up
with a situation which I don't know how to handle.
I just noticed that when a Tie (or Ties) crosses a line break, two
TieColumns are generated, one containing each "half". See:
> \version "2.19.80"
> inspectTies =
> #(define-music-function (example-name) (string?)
> #{ \override TieColumn.before-line-breaking =
> #(lambda (tc)
> (let ((ties (ly:grob-object tc 'ties)))
> (pretty-print (format "~a, before line breaking: ~a" example-name
> ties))))
> \override TieColumn.after-line-breaking =
> #(lambda (tc)
> (let ((ties (ly:grob-object tc 'ties)))
> (pretty-print (format "~a, after line breaking: ~a" example-name
> ties)))) #} )
> \score {
> \relative c'' {
> <c g e>1~ \break |
> \inspectTies "With a chord" q
> }
> }
> \score {
> \relative c'' {
> c1~ \break |
> \inspectTies "With a note" c
> }
> }
> \score {
> \relative c'' {
> c1~ |
> \inspectTies "With a note and no line breaking" c
> }
> }
>
>
>
Gives the following output in the Lilypond Log:
> "With a chord, before line breaking: #<Grob_array#<Grob Tie > #<Grob Tie >
> #<Grob Tie > >"
>
> "With a note, before line breaking: #<Grob_array#<Grob Tie > >"
>
> "With a note and no line breaking, before line breaking:
> #<Grob_array#<Grob Tie > >"
>
> "With a chord, after line breaking: #<Grob_array#<Grob Tie > #<Grob Tie >
> #<Grob Tie > >"
>
> "With a chord, after line breaking: #<Grob_array#<Grob Tie > #<Grob Tie >
> #<Grob Tie > >"
>
> "With a note, after line breaking: #<Grob_array#<Grob Tie > >"
>
> "With a note, after line breaking: #<Grob_array#<Grob Tie > >"
>
> "With a note and no line breaking, after line breaking: #<Grob_array#<Grob
> Tie > >"
>
Since both TieColumns seem to exist in the same moment, how can I
differentiate between the two? More specifically, how can I make sure that
I'm in the TieColumn that is on the second system?
Say, for instance, that I want to get to the ties contained in a TieColumn
and modify some properties. Getting to the Ties that are on the end of the
first system is easy because I can do that through
TieColumn.before-line-breaking, which takes effect before the Ties are
"split". But how can I make sure I'm in the second one? I don't know what
property I could check.
Any help would be greatly appreciated!
Stéfano
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