Re: multiple TextSpanners per voice

[David Nalesnik]

David,

On Fri, Oct 2, 2015 at 11:26 AM, David Kastrup <address@hidden> wrote:

> David Nalesnik <address@hidden> writes:
>
> > Hi all,
> >
> > I'm experimenting with a way to support multiple text spanners in a
> single
> > voice, using the 'spanner-id property which already enables multiple
> slurs
> > and phrasing slurs.
> >
> > The attached code works--until the spanners cross a line break.  Then the
> > order of the spanners is reversed.  I've experimented with different
> start
> > and end points of the spanners, reversing lists within the engraver--no
> > change.
> >
> > The second example shows that tweaks can mess up this reversed ordering
> > even further.
> >
> > Does anyone know what is happening here?  I really have no idea :(
>
> Sounds like room-saving stacking of elements with equal
> outside-staff-priority (?).  Perhaps distribute ascending priorities?


Exactly!  Thanks so much.

The following is one of the examples from the file, with
outside-staff-priority tweaks.  The order is preserved.

\relative c' {
  \override TextSpanner.outside-staff-padding = 2
  \override TextSpanner.thickness = 4
  \override TextSpanner.style = ##f
  a4
  -\tweak color #red
  \startTextSpan
  b c
  -\tweak color #darkred
  -\offset outside-staff-priority 1
  \startTextSpanOne
  d

  a4
  -\tweak color #magenta
  -\offset outside-staff-priority 2
  \startTextSpanTwo
  b c
  -\tweak style #'zigzag
  -\offset outside-staff-priority 3
  \startTextSpanThree
  d
  \break

  a4 b c d\stopTextSpanThree

  a4 b\stopTextSpanTwo
  c d\stopTextSpanOne
  a4 b c d\stopTextSpan
}

%%%%%

Naturally, it would be nice to do this without needing the extra tweaks.
 outside-staff-priority could be altered behind-the-scenes, but that seems
somehow...dishonest.  Though, of course, two spanner with priorities 350
and 351 would be unlikely to interfere with placement of other objects.

DN