Re: Various clean-ups in stems and beams. (issue 6584045)

[Marc Hohl]

Am 02.10.2012 16:56, schrieb address@hidden:
> On 2 oct. 2012, at 16:42, address@hidden wrote:
>
> > What I mean is that if something like
> >
> > {
> > \override NoteHead #'style = #'kievan
> > c'8
> > }
> >
> > produces a quarter note in the output, the user is likely to be
> > thoroughly confused.
> Is this because of the duration-log override?  NoteHead #'duration-log for 
> Kievan notation should be a separate function that is not based on style (this 
> is what I propose in my patch).
>
> > If NoteHead and Stem properties are set up in engraver-init.ly, then if
> > the user wants a Kievan NoteHead somewhere other than in a KievanVoice
> > context, he will need to set up other overrides in addition to NoteHead
> > style.
> Why can't we have commands \startKievan and \stopKievan that do all the 
> overrides simultaneously?
That might be the best way to go indeed.

While I support the idea of supporting the user as much as possible, the 
underlying structure
of properties and callbacks should separate different 'tasks'.

For educational reasons, one might want to switch between normal and 
kievan notation,
but in this case,

c d e f
\startKievan
c d e f
\stopKievan

looks way better to me than

c d e f
\override NoteHead #'style = #"kievan"
c d e f
\revert NoteHead #'style

(if that would work, it is).

Taking David's recent patches into account there seems to be a global
'simplification for the user' direction concerning lilypond's usability, so
getting rid of \override stuff in this case looks like the right way to go.
> For example, the command \hideNotes groups together several overrides.  I think 
> it would be a mistake to make \override NoteHead #'transparent also control 
> Dots and Stems by default.  It's better to have a global command that groups 
> together all these overrides.
+1

Marc