Re: after \once \set fingeringOr ientations… Lilypond falls back to #up

[Dmytro O. Redchuk]

On Mon 04 Jul 2011, 14:17 -Eluze wrote:
> Dmytro O. Redchuk-2 wrote:
> > 
> > pps. Let's continue with "\once \set" issue.
> > 
> sure - i'll try to summarize:
> 
> 
> \set deals with context properties
> \override deals with grob properties
> \override stacks the previous settings and recalls them when \once is used
> \revert falls back to the "original" settings (whatever this means)
> \set does not stack the previous (changed) settings so it does not fall back
> on those when \once is used
> \unset falls back to the original settings as well
I've added this as issue 1740:
http://code.google.com/p/lilypond/issues/detail?id=1740

Thank you!

> 
>  
> 
> now there is a problem when you define your own context properties:
> 
> fingeringOrientations are defined at the \Score level; even if you define a
> different list in the \voice level, after a \unset or \once \set the
> fallback will go to the original \Score definitions.
> 
> this is not very helpful when you write guitar notes which often need 3 (or
> even more) polyphonic voices:
> 
> often you will put the bass, discant and the notes between into three
> different voices and use a different fingering policy for each: the bass
> gets the fingering below, the discant above and the notes between are
> fingered on the left (or right). you can define this in a \with or \layout
> {\context … }command
> 
> sometimes you have to change this policy (there are many reasons for such a
> temporary change) - that's life (or music)!
> 
> and that's where the lack of stacking the previous settings becomes
> disastrous: you have to redefine what you thought was defined for the rest
> of the voice; what you had defined for the voice is overridden and has gone.
> 
> the \once becomes some kind of "shortcut" for "\set it for the next
> espression and then forget all the previous settings" - except for the high
> level definition.
> 
>  
> 
> hope this does not sound to pessimistic but shows what is needed from a
> practical view. i wouldn't qualify the actual situation as buggy but
> certainly worth to be thought over, documented or even changed!
> 
> in any case - if i missed something please let me know!
> 
> cheers
> 
> Eluze
> 
> 
> 
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-- 
  Dmytro O. Redchuk
  Bug Squad
                                         "Easy to use" is easy to say.
                                                       --Jeff Garbers