Mon, 24 Nov 2003 22:10:39 -0800, Guy a dit :
> I'm trying to typeset music for classical guitar for which I need
> to be able to produce the barre
> symbol. I've managed to acheive the desired output with text
> spanners via the code:
> \property Voice.TextSpanner \set #'edge-text = #'("C II " . "")
> \property Voice.TextSpanner \set #'direction = #1
> \property Voice.TextSpanner \set #'style = #'line
> \property Voice.TextSpanner \set #'edge-height = #'(0 . 0.5)
> \property Voice.TextSpanner \set #'padding = #1
> \property Voice.TextSpanner \set #'enclose-bounds = ##t
> c''\startTextSpan ..... \stopTextSpan
> I'de like to define this as a pair of commands. The first would be
> \statBarre which would take as
> a parameter the barre position, say \startBarre "IV". The position
> has to be concatinated with the
> "C" symbol and replaced as the first parameter in the edge-text
> property. The second command
> is a simple \stopBarre which I think I can do by just defining:
> stopBarre = \stopTextSpan.
> Thanks.
Supposing one is using the extra lib[1] that I mentionned in a reply to
Paul Scott, here what it could look like :
------------------------------------------------------------
#(use-modules (ice-9 optargs)
(srfi srfi-13)
(lilypond music))
#(define (barre str)
(ly:export
(mus:seq
(mus:context-override Voice TextSpanner edge-text
(cons (string-concatenate (list "C " str)) "") #:once #t)
(mus:context-override Voice TextSpanner direction 1 #:once #t)
(mus:context-override Voice TextSpanner style 'line #:once #t)
(mus:context-override Voice TextSpanner edge-height '(0 . 0.5)
#:once #t)
(mus:context-override Voice TextSpanner padding 1 #:once #t)
(mus:context-override Voice TextSpanner enclose-bounds #t
#:once #t))))
\score { \notes {
c' c'#(barre "II") c'\startTextSpan c'\stopTextSpan
c' c'#(barre "IV") c'\startTextSpan c'\stopTextSpan }}
------------------------------------------------------------
I don't think that it is possible to put property overrides between
the note and the span event, that's why the `barre' function only sets
the properties.
[1] http://nicolas.sceaux.free.fr/schemingly/scheme-hacks.html
Regards,
nicolas
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