RE: Is it possible to have a single \override for same context/Grob for different property values?

[James Lowe]

Hello,

> -----Original Message-----
> From: Carl Sorensen [mailto:address@hidden
> Sent: 25 January 2011 00:17
> To: Neil Puttock
> Cc: James Lowe; lilypond-devel
> Subject: Re: Is it possible to have a single \override for same context/Grob
> for different property values?
> 
> 
> 
> 
> On 1/24/11 5:15 PM, "Neil Puttock" <address@hidden> wrote:
> 
> > On 25 January 2011 00:10, Carl Sorensen <address@hidden> wrote:
> >
> >> If you use pairs, instead of lists, for the property overrides then
> >> the override list is a standard  alist:
> >>
> >> \overrideGrobProps #'Accidental #`((color . ,red) (font-size . 4)
> >> (extra-offset . (1.5 . 3)))
> >
> > Yup, but then you have to type those annoying full stops (or periods,
> > if you prefer. :)
> >
> 
> This is true, but it's also consistent with the standard idiom of LilyPond
> (another GLISS discussion, I suppose....)
> 

So is that a yes or no?

:)

What I am trying to avoid a scheme-code implementation in my .ly file simply 
because as a 'normal' user all that stuff is hard for me. I expect I am not the 
only one who struggles with knowing when to use a Grob  and/or context (or 
which one even) the properties are not such a big deal once you figure the 
context out - some \overrides seem to not need a grob and some do but anyway - 
to give you some context of where this came from

http://lsr.dsi.unimi.it/LSR/Item?id=375

The construct uses

notes = {
  \repeat unfold 5 { f,16 e' d' c' }
  \repeat unfold 5 { a16 c, e, c }
  \repeat unfold 5 { b16 f' c' g' }
  \repeat unfold 5 { d,16 g c f }
  \repeat unfold 5 { e,16 g b d }
  \repeat unfold 5 { g,16 a b c }
  \repeat unfold 5 { \stemDown d,16 a' e' b' }
}

damping = \repeat unfold 7 {
  %% default beam damping is 1:
  \override Beam #'damping = #1 s4^"1 (def.)"
  \override Beam #'damping = #2 s^"2"
  \override Beam #'damping = #4 s^"4"
  \override Beam #'damping = #-3 s^"-3"
  \override Beam #'damping = #+inf.0 s^"+inf.0"
}

And then have the construct

    <<
    \notes
    \damping
    >>

This works but if I want two or more overrides for the same group of notes it 
breaks down.

So I was looking how to apply a 'single' instance of an override with the same 
context but for multiple properties.

I realise that this might not be the best way for 'day to day' scores but I can 
see some user for this for theoretical pieces or simplifying the creation of 
musical exercises for instance.

James