Re: \set - \override #(set

[Carl Sorensen]

On 3/26/11 3:35 PM, "Damian leGassick" <address@hidden> wrote:

> Hi all
> 
> I've been using lilypond for years but I still can't figure out the rationale
> for
> 
> e.g.
> 
> bar numbers - why us it:
> 
> \override Score.BarNumber #'break-visibility blah (note capital B)

BarNumber is a Grob, so it starts with a capital letter.  And its property
break-visibility is being overridden.

> 
> but
> 
> \set Score.currentBarNumber #blah (note camelCase)

currentBarNumber is a property of the Score (actually Timing, which is
aliased to Score) context.

> 
> and why #(set-accidental-style etc

Because in order to change the accidental style, lots of things need to be
done, so it's a Scheme procedure.

> 
> and not
> 
> \set Score.accidentalStyle

If there were a context property of a Score that was accidentalStyle, this
would work.

>or even \set Score.Accidental style

If Accidental grobs had an interface with a 'style property, you could do

\override Score.Accidental #'style = #blah

Of course, it doesn't.

> 
> is there any easy way to remember whether it's \set \override or #(set*?
> 

\set for Context Properties (see Internals Reference section 2.3)

\override for Grob Properties (see Internals Reference section 3.3)

#(set  for specific applications -- set-accidental-style,
set-global-staff-size.

HTH,

Carl