Re: \balloonText applied to single note errors with symbol->string ??

[David Kastrup]

Thomas Morley <address@hidden> writes:

> Hi,
>
> the code below
>
> \layout { \context { \Voice \consists "Balloon_engraver" } }
> { c'-\balloonText #'(2 . 0) \markup { "1" } }
>
> returns (in 2.21.0):
> ERROR: In procedure symbol->string:
> ERROR: Wrong type argument in position 1 (expecting symbol): ()
>
> 2.18.2 gives a more useful message:
> /home/hermann/lilypond/usr/share/lilypond/current/scm/lily-library.scm:242:8:
> In procedure symbol->string in expression (process-procedure book
> paper ...):
> /home/hermann/lilypond/usr/share/lilypond/current/scm/lily-library.scm:242:8:
> Wrong type argument in position 1 (expecting symbol): ()
>
> Though, I've no clue where symbol->string comes into the game...

In lily/balloon-engraver.cc

> Ofcourse the NR recommends to use balloonText _inside_ of chords, and
> indeed the problem goes away, wrapping the note in an event-chord.
> But shouldn't it work as a postevent to a single note, too??

The implementation does not work with separate AnnotateOutput events
(more exactly, they require specifying the particular grob type to use
since usually a number of grobs could be annotated).  One could try to
capture all rhythmic-events and annotate them all.  It's all reasonably
icky stuff that should at one point of time be upgraded to look like
what we do with footnotes.  As a stopgap measure, one could use the
following patch for a bit nicer behavior.

0001-Warn-about-balloonText-outside-of-chords.patch
Description: Text Data

-- 
David Kastrup