Hi Scheme wizards, can you help me?
I have two unrelated questions regarding the attached file.
It is a very much stripped down version of a function actually in use.
It takes an annotation from the input file, produces a clickable message
on the console and colors the affected object. (In reality it does and
will do more, but that's what's necessary for the example/question).
###
The first question should be quite simple, but I don't seem to find a
solution on my own: How can I make the function be able to affect only
selected items, e.g. only one note of the chord in the example (or only
a specific tie etc.)
When I change the \once \override clause to
\tweak color #magenta #item
it colors all subsequent items of the given type.
###
The other issue is probably trickier. Is it possible (at all) to
determine the current barnumber from within such a music function? I
want to print that to the console along with the other arguments and
particularly to annotation files.
Is there any hope in achieving that?
TIA
Urs
\version "2.18.2"
annotate =
#(define-music-function (parser location properties item)
(ly:context-mod? symbol-list-or-music?)
;; annotates a musical object for use with lilypond-doc
(let*
(
;; create dummy alist (is that necessary?)
(props '( )))
;; Add or replace props entries taken from the properties argument
(map (lambda (mod) (set! props
(assoc-set! props
(symbol->string (cadr mod)) (caddr mod))))
(ly:get-context-mods properties))
;; produce a clickable message
(ly:input-message location "Annotation")
;; Print a message with all properties to the console
(map (lambda (prop)
(ly:message (format " ~a: ~a" (car prop) (cdr prop))))
props)
(ly:message "\n"))
;; Color the affected grob
#{ \tweak color #darkgreen #item #})
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Usage example
{
\annotate \with {
author = "Urs Liska"
message = "Important information"
}
NoteHead
<c' e' g'>-> d' e'
}_______________________________________________
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