Re: changing grob properties?

[Neil Puttock]

2009/5/16 Marc Hohl <address@hidden>:
> Neil Puttock schrieb:
>>

> So can I use it as a callback for 'stencil? (see below)

Not for the broken spanners, since they haven't been created when the
stencil callback is evaluated.

> Hm, I didn't get any errors, and invisible ties are exactly the feature I
> need.

They only show up if the binary is compiled without optimisations:

/home/neil/Desktop/test.ly:24:17: warning: programming error: cyclic
dependency: calculation-in-progress encountered for #'stencil (Tie)
      g8 g ~ g g
                 ~ g g~ g g ~

> At first, I used
>
> \override Tie #'after-line-breaking = #tie::handle-tab-tie
>
> but I didn't quite understand the term "after-line-breaking", since
> tie::handle-tab-tie is
> called on _every_ tie. So I changed the call to
> \override Tie  #'stencil = #tie::handle-tab-tie
>
> and found out that it works, too, and has the advantage not to write
> \override Tie  #'stencil = ##f
>
> explicitly. But if this is a crude style, I won't apply it. On the other
> hand, when
> this offers a possibility to change the TabNoteHead stencil on the fly, it
> could be used.

It's malformed as a stencil callback, since it returns no stencil (or
even #f).  It produces no ties as a side effect.

>
> Can I switch to another tablature format, according to
>
> \set tablatureFormat = #parenthesized-tab-format / which is not defined yet?

No, since you wouldn't be able to distinguish between the two
formatting functions based on the note events.

Regards,
Neil