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