Re: TextSpanner to end of bar / end of piece

[Lukas-Fabian Moser]

Hi Harm,

So this seems to mean that right-broken.text should be changed by a 
hook that determines if we are at a line break. I'llt try to see if I 
can figure out how to do this.


It seems to suffice to copy right.text into right-broken.text only for 
the last bit of a broken TextSpanner:


   \override TextSpanner.after-line-breaking =
    #(lambda (grob)
   ; Copies bound-details.right settings to bound-details.right-broken
   ; for the last part of a broken spanner.
   ; This is needed because, if to-barline = ##t and the last part ends
   ; at a line break, the values from right-broken are used.
   (let*
    ((orig (ly:grob-original grob))
 (siblings (if (ly:grob? orig)
   (ly:spanner-broken-into orig)
   '(
    (if (not (null? siblings))
    (if (eq? grob (car (last-pair siblings)))
    (ly:grob-set-nested-property!
 grob
 '(bound-details right-broken)
 (ly:assoc-get 'right (ly:grob-property grob 
'bound-details)))




Thanks for the hint, Harm!

Lukas

\version "2.22"

spanTest = {
  \override TextSpanner.to-barline = ##t
  \override TextSpanner.bound-details.right-broken.text = ##f
  \override TextSpanner.after-line-breaking =
  #(lambda (grob)
 ; Copies bound-details.right settings to bound-details.right-broken
 ; for the last part of a broken spanner.
 ; This is needed because, if to-barline = ##t and the last part ends
 ; at a line break, the values from right-broken are used.
 (let*
  ((orig (ly:grob-original grob))
   (siblings (if (ly:grob? orig)
 (ly:spanner-broken-into orig)
 '(
  (if (not (null? siblings))
  (if (eq? grob (car (last-pair siblings)))
  (ly:grob-set-nested-property!
   grob
   '(bound-details right-broken)
   (ly:assoc-get 'right (ly:grob-property grob 'bound-details)))

  \override TextSpanner.bound-details.right.text = "R"

  \override TextSpanner.bound-details.left.text = "L"
  \override TextSpanner.bound-details.left-broken.text = \markup\right-align "(L)"

  <>\startTextSpan
  s1
  \break
  <>\stopTextSpan
  s1
  <>\startTextSpan
  s1 \break
  s1 \break
  s1
  <>\stopTextSpan
  <>\startTextSpan
  s1 \break
  s1 \break
  s1 \break
  <>\stopTextSpan
}

\new Staff {

  \spanTest

  s4 % makes last "right" appear (but extends piece)
}

Re: TextSpanner to end of bar / end of piece

[Lukas-Fabian Moser]

Hi Harm,



{
  \override TextSpanner.bound-details.right.text = "R"
  \override TextSpanner.bound-details.left.text = "L"
  \override TextSpanner.to-barline = ##t

  <>\startTextSpan
  s1
  \break
  <>\stopTextSpan
  s1
  <>\startTextSpan
  s1
  <>\stopTextSpan
}

Though, if the TextSpanner does not end at line-end you'll need 
different settings.

Probably doable by some scheme-coding ...


Ah, yes. It seems that with to-barline, the right-broken.text is used at 
the end of the line. Thanks!


So this seems to mean that right-broken.text should be changed by a hook 
that determines if we are at a line break. I'llt try to see if I can 
figure out how to do this.


Lukas

Re: TextSpanner to end of bar / end of piece

[Thomas Morley]

Am Mo., 24. Mai 2021 um 15:16 Uhr schrieb Lukas-Fabian Moser :

> Folks,
>
> two questions about the behaviour of textSpanners:
>
> First question:
>
> If a TextSpanner ends at the beginning at a bar which happens to be a line
> break, then
>
> - with TextSpanner.to-barline = ##f, I get the left-broken.text and the
> right.text immediately after one another at the beginning of the second
> system,
>
> - with TextSpanner.to-barline = ##t, I get no artifacts in the next line,
> but right.text is missing in the first system.
>
> What I want: The text spanner should end at the last barline of the first
> system, but right.text should be printed.
>
> Second question: Is it possible to let a TextSpanner end precisely at the
> end of a piece (last barline) with right.text being printed?
>
> I can approximate the desired behaviour in both cases by letting the
> TextSpanner end a very short amount of time before the actual end of the
> bar, but that feels conceptually wrong and also does not yield the correct
> position of "R".
>
> Lukas
>

Hi Lukas,

below works for me:

{
  \override TextSpanner.bound-details.right.text = "R"
  \override TextSpanner.bound-details.left.text = "L"
  \override TextSpanner.to-barline = ##t

  <>\startTextSpan
  s1
  \break
  <>\stopTextSpan
  s1
  <>\startTextSpan
  s1
  <>\stopTextSpan
}

Though, if the TextSpanner does not end at line-end you'll need different
settings.
Probably doable by some scheme-coding ...

Cheers,
  Harm