2017-02-15 21:06 GMT+01:00 Urs Liska <u...@openlilylib.org>:
> Hi all,
>
> is it really true that the text of the OttavaBracket can't be
> customized? All I could find was the doc snippet
> http://lilypond.org/doc/v2.19/Documentation/snippets/text#text-ottava-text
> which suggests to manually set Staff.ottavation after the \ottava command.
>
> With this I created a function (overwriting the built-in function)
>
> #(define ottava
> (let ((orig-ottava ottava)
> (numbers '("15" "8" "" "8" "15")))
> (define-music-function (oct)(integer?)
> #{
> #(orig-ottava oct)
> #(if (not (= oct 0))
> #{
> \set Staff.ottavation = #(list-ref numbers (+ oct 2))
> #})
> #})))
>
>
> which actually does what I want (change "8va" to "8"), but I can't
> believe that it is really necessary to go that long way for a seemingly
> simple task.
>
> Any comments?
> Urs
Hi Urs,
best I can currently think of:
\version "2.19.52"
%% Define new context-property 'ottavaText'
#(define (define-translator-property symbol type? description)
(if (not (and (symbol? symbol)
(procedure? type?)
(string? description)))
(ly:error "error in call of define-translator-property"))
(if (not (equal? (object-property symbol 'translation-doc) #f))
(ly:error (_ "symbol ~S redefined") symbol))
(set-object-property! symbol 'translation-type? type?)
(set-object-property! symbol 'translation-doc description)
symbol)
#(for-each
(lambda (x)
(apply define-translator-property x))
`((ottavaText
,list?
"An alist of pairs with ottavation-number and markup.")))
%% Redefine 'make-ottava-set'
#(define (make-ottava-set music)
"Set context properties for an ottava bracket."
(let ((octavation (ly:music-property music 'ottava-number))
(labels
'((2 . "15ma")
(1 . "8va")
(0 . #f)
(-1 . "8vb")
(-2 . "15mb"))))
(list (context-spec-music
(make-apply-context
(lambda (context)
(let* ((offset (* -7 octavation))
(ctx-label-list
(ly:context-property context 'ottavaText))
(string
(assoc-get octavation
(if (null? ctx-label-list)
labels
ctx-label-list))))
(set! (ly:context-property context 'middleCOffset) offset)
(set! (ly:context-property context 'ottavation) string)
(ly:set-middle-C! context))))
'Staff))))
%% Redefine 'ottava'
ottava =
#(define-music-function (octave) (integer?)
(_i "Set the octavation.")
(make-music 'OttavaMusic
'elements-callback make-ottava-set
'ottava-number octave))
%%%%%%%%%%%%%%%%%%%%%
%% EXAMPLE
%%%%%%%%%%%%%%%%%%%%%
\layout {
\context {
\Staff
ottavaText =
#`((2 . ,(markup #:rounded-box "16.0"))
(1 . "8.0")
(0 . #f)
(-1 . "8.0")
(-2 . ,#{ \markup \rotate #90 "16.0" #}))
}
}
{
\ottava #2 c''
\ottava #1 c''
\ottava #0 c''
\ottava #-1 c''
\ottava #-2 c''
}
HTH,
Harm
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