Mark Knoop <m...@opus11.net> writes:
> Hi,
>
> I'm (mis)using the Measure_counter_engraver to indicate numbers of
> repeats, overriding the default stencil with customStencilFromMarkup
> from openlilylib.
>
> Is it possible to adjust the horizontal alignment of the stencil such
> that it is always centered on the barline? The current situation varies
> depending on line breaks and changing time-signatures - see example
> below.
>
> Any suggestions?
>
>
> \version "2.18.2"
>
> customStencilFromMarkup =
> #(define-music-function (parser location name mrkup) (string? markup?)
> (let* ((name (string-regexp-substitute " " "" name))
> ; remove any spaces
> (name-components (string-split name #\.))
> (context-name "Voice")
> (grob-name #f))
>
> (if (> 2 (length name-components))
> (set! grob-name (car name-components))
> (begin
> (set! grob-name (cadr name-components))
> (set! context-name (car name-components))))
> #{
> \override $context-name . $grob-name #'stencil =
> #(lambda (grob)
> (grob-interpret-markup
> grob mrkup))
> #}))
>
> repeatBars = #(define-music-function
> (parser location times music)
> (number? ly:music?)
> (_i "make a repeat structure")
> #{
> \customStencilFromMarkup "Staff.MeasureCounter"
> \markup \whiteout \box \concat {
> \vcenter "×" \vcenter \number #(ly:number->string times)
> }
> \startMeasureCount
> <<
> \repeat volta #times { $music }
> { s16 \stopMeasureCount }
> >>
> #})
This is not actually an answer to your problem at hand, but all that
name-splitting seems tedious. You could just do
customStencilFromMarkup =
#(define-music-function (parser location name mrkup) (symbol-list? markup?)
#{
\override #name . stencil =
#(lambda (grob)
(grob-interpret-markup
grob mrkup))
#})
repeatBars = #(define-music-function
(parser location times music)
(number? ly:music?)
(_i "make a repeat structure")
#{
\customStencilFromMarkup Staff.MeasureCounter
\markup \whiteout \box \concat {
\vcenter "×" \vcenter \number #(ly:number->string times)
}
\startMeasureCount
<<
\repeat volta #times { $music }
{ s16 \stopMeasureCount }
>>
#})
in 2.18. It might be worth considering to exchange the order of name
and mrkup and turn name into the type symbol-list-or-music? instead,
then use a tweak rather than an override. That way,
customStencilFromMarkup could be used as either a tweak or an override.
While swapping the argument order is not strictly necessary, combining
multiple tweaks becomes awkward fast if the music argument does not come
last.
--
David Kastrup
_______________________________________________
lilypond-user mailing list
lilypond-user@gnu.org
https://lists.gnu.org/mailman/listinfo/lilypond-user
