Hi all, I was tempted by this page to try to create my own custom Staff
context:
http://lilypond.org/doc/v2.16/Documentation/notation/defining-new-contexts
I currently use a number of overrides in the Staff \with block, so was hoping
this would be a more elegant way of achieving that (because it could go in an
\include file).
After trying various things I think I have it working, but I thought I'd share
what I found in case it might help future travelers on this path, and because
the solution I came up with is different from the one on the documentation page
above, and I didn't find it in the LSR.
First I followed the page from the documentation listed above. I included all
of the engravers that a standard Staff uses, to duplicate a staff, to which I
could add my overrides:
%%%% Begin 1st Approach
\version "2.16.0"
\layout {
\context {
\name CustomStaff
\type "Engraver_group"
\consists "Accidental_engraver"
\consists "Axis_group_engraver"
\consists "Bar_engraver"
\consists "Clef_engraver"
\consists "Collision_engraver"
\consists "Cue_clef_engraver"
\consists "Dot_column_engraver"
\consists "Figured_bass_engraver"
\consists "Figured_bass_position_engraver"
\consists "Font_size_engraver"
\consists "Footnote_engraver"
\consists "Grob_pq_engraver"
\consists "Instrument_name_engraver"
\consists "Key_engraver"
\consists "Ledger_line_engraver"
\consists "Ottava_spanner_engraver"
\consists "Output_property_engraver"
\consists "Piano_pedal_align_engraver"
\consists "Piano_pedal_engraver"
\consists "Pure_from_neighbor_engraver"
\consists "Rest_collision_engraver"
\consists "Script_row_engraver"
\consists "Separating_line_group_engraver"
\consists "Staff_collecting_engraver"
\consists "Staff_symbol_engraver"
\consists "Time_signature_engraver"
\override StaffSymbol #'line-positions = #'( 4 0 -4 )
\alias Staff
}
\context {
\Score
% Must be capital "S" \Score. Little "s" \score breaks things.
% This was not apparent from that documentation page
% since it uses Voice as its example
\accepts CustomStaff
% Was unclear whether "CustomStaff" needed to be in quotes or
not.
% But maybe it does not matter...
% The documentation page actually shows it both ways (!)
}
}
melody = \relative c' {
c4 d e f g a b
}
\score {
\new CustomStaff {
\melody
}
\layout { }
\midi { }
% including this midi part leads to a warning that it cannot find
"CustomStaff"
%
}
%%%% End 1st Approach
After some fiddling (see comments in the snippet above) I got this to run and
for my override to show up in the new custom staff, but I could not get any
noteheads to appear, and I don't know why that is.
Then I tried searching the LSR and user list and found this post:
http://lists.gnu.org/archive/html/lilypond-user/2010-05/msg00002.html
Which suggested the following approach instead:
%%%% Begin 2nd Approach
\version "2.16.0"
\layout {
\context {
\Staff
\name CustomStaff
\alias Staff
\override StaffSymbol #'line-positions = #'( 4 0 -4 )
}
\context {
\Score
\accepts CustomStaff
}
\context {
\ChoirStaff
\accepts CustomStaff
}
\context {
\GrandStaff
\accepts CustomStaff
}
\context {
\PianoStaff
\accepts CustomStaff
}
\context {
\StaffGroup
\accepts CustomStaff
}
}
melody = \relative c' {
\clef treble
\key c \major
\time 4/4
c4 d e f g a b
}
\score {
\new CustomStaff {
\melody
}
\layout { }
\midi { }
}
%%%% End 2nd Approach
This appears to work. (...after I remembered to put "\alias Staff" in.)
But is there anything I'm missing? Is this a good way to go, or would I be
better off sticking to my \with blocks and \overrides applied to the standard
Staff context? Is there a reason it is not covered in the documentation?
If this is a good and legitimate approach, it might be nice to include it on
that documentation page, along with the custom Voice-type context definition
that's already there -- even as just a snippet or extra example. I'm happy to
add it to the LSR in any case.
Cheers,
-Paul
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