Re: font size for instrument names in a PianoStaff

[Marc Hohl]

Am 25.09.2013 11:03, schrieb David Kastrup:
> Marc Hohl <address@hidden> writes:
>
> > Hello list,
> >
> > I tried to enhance the definition found in
> >
> > http://lists.gnu.org/archive/html/lilypond-user/2013-09/msg00416.html
> >
> > which works pretty well for staves, but not for PianoStaff contexts.
> > The size of the second PianoStaff.instrumentName is unchanged, but it
> > should be much smaller.
> >
> > Can anybody explain to me what's wrong with my definition?
> >
> > Thanks in advance,
> >
> > Marc
> >
> > \version "2.17.25"
> >
> > staffSize = #(define-music-function (parser location new-size) (number?)
> > #{
> >    \set Staff.fontSize = #new-size
> >    \set PianoStaff.fontSize = #new-size
> >    \override Staff.StaffSymbol #'staff-space = #(magstep new-size)
> >    \override Staff.StaffSymbol #'thickness = #(magstep new-size)
> > #})
>
> [...]
>
> >       \new PianoStaff \with
> >         { instrumentName = "size -5"
> >           \staffSize #-5 }
>
> Well, looking at ly/engraver-init.ly, you are likely missing out on
>
>      \consists "Font_size_engraver"
>
> in your context modification.

Ah, thanks a lot!

> Alternatively, you can do its job by hand
> and set
>
> \override InstrumentName.font-size = #-5

This would work *without* the \set Staff.fontSize declaration, otherwise 
they seem to be applied consecutively ...

> Since the PianoStaff is basically a StaffGroup, it does not have much
> use for a Font_size_engraver.  The context setting fontSize is more
> intended for the stuff above and below staves.

I see. So the font size modification of a normal Staff via
\set Staff.fontSize is a side effect?

Thanks a lot,

Marc
>