Re: still no ultimate way to create three-staff piano layout

[Keith OHara]

On Mon, 16 Dec 2013 01:07:35 -0800, David Kastrup <address@hidden> wrote:

> Keith OHara <address@hidden> writes:
>
> > The StaffGrouper, that makes different spacing at the end of a group, is
> > created by the Vertical_align_engraver (despite what the manual says) so
> > if you remove the Vertical_align_engraver form the PianoStaff, only the
> > enclosing StaffGroup will have the appearance of a group.
>
> Does that mean that the patch pushed in
> <URL:http://code.google.com/p/lilypond/issues/detail?id=3641#c7> (why
> has the issue been reopened instead of creating a new one for the
> documentation) is incomplete?  The effect of the patch should be that
> nested "Vertical_align_engraver"s behave as if the inner engravers have
> been removed altogether.

Vertical_align_engraver makes the start braces around, and adjusts spacing 
between, the staves it contains.  We do sometimes want a GrandStaff (Flute 1 
and 2) inside a StaffGroup (woodwinds) and in those cases want both 
Vertical_align_engravers to be active and drawing their braces.

Karol had a special case, here, where he did *not* want the inner 
Vertical_align_engraver doing its job.

David, you might have confused the jobs of Vertical_align_engraver (draws start 
braces, etc.) and Axis_group_engraver (arranges notes, etc. on to lines of 
music).  I'll comment on your patch so you can check that it does what you 
meant to at the time.