Re: New issue: Add StaffAxis context type

[tisimst]

On 8/26/2015 4:23 PM, David Kastrup [via Lilypond] wrote:
> tisimst <[hidden email] 
> </user/SendEmail.jtp?type=node&node=180227&i=0>> writes:
>
> > On 8/26/2015 1:14 PM, David Kastrup [via Lilypond] wrote:
> >> David Kastrup <[hidden email]
> >>
> >> > Perhaps OneStaff?
> >
> >> \oneVoice _is_ sort of the name for not separating voices vertically.
> >
> > I can see that, but it still doesn't seem quite right to me. As I've
> > thought about this more, I'm having a hard time understanding what is
> > different about this proposed "StaffAxis" vs. the already defined
> > StaffGroup? It already accepts most other staff contexts, so can we 
> just
> > further add to its capabilities? It seems like all it's really lacking
> > is the "Axis_group_engraver". I haven't tested what you've added to
> > engraver-init.ly, etc., but does it look like this:
> >
> > %%%%%%%%%%%%%%%%%%%%
> >
> > \layout {
> >    \context {
> >      \StaffGroup
> >      \consists "Axis_group_engraver"
> >    }
> > }
> >
> > \new StaffGroup {
> >    \new Staff {
> >      c' d' e' f'
> >      \chords \with { \override ChordName.Y-offset = -1 } {
> >        d1:m7 b1:min7.5-
> >      }
> >    }
> >    \chords \with { \override ChordName.Y-offset = -1 } {
> >      d1:m7 b1:min7.5-
> >    }
> > }
>
> StaffGroup has a Vertical_align_engraver.  It accepts contexts with a
> vertical alignment, like StaffGroup itself or GrandStaff.  As a vertical
> grouper, it has a Span_bar_engraver.  It has an Instrument_name_engraver
> and a System_start_delimiter_engraver.  It's quite a different kettle of
> fish.
>
> > I realize that the StaffAxis \accepts more contexts than StaffGroup
> > does,
>
> That is probably a shortcoming of StaffGroup.  More important are the
> contexts that StaffGroup _does_ accept and StaffAxis doesn't.  And the
> multitude of different engravers.

Got it. How about one of these:

- AlignmentStaff
- StaffAligner
- ContextAligner
- CompositeStaff
- HybridStaff
- StaffBlend
- AssortedStaff

Maybe "StaffAxis" is the best one. Is the purpose just to fix the 
vertical alignment issue?

- Abraham






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