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% DO NOT EDIT this file manually; it is automatically
% generated from Documentation/snippets/new
% Make any changes in Documentation/snippets/new/
% and then run scripts/auxiliar/makelsr.py
%
% This file is in the public domain.
%% Note: this file works from version 2.14.0
\version "2.14.0"
\header {
%% Translation of GIT committish: 8b93de6ce951b7b14bc7818f31019524295b990f
texidoces = "
Se puede acceder @qq{lateralmente} a algunos grobs desde dentro de la
función de callback de otro grob. Éstos se encuentran relacionados
normalmente como @qq{layout objects} (objetos de presentación) en la
sección @qq{Internal properties} (propiedades internas) de un
interface de grob. Se usa la función @code{ly:grob-object} para
acceder a estos grobs.
Se presentan más abajo como ejemplo algunas formas de addecer a grobs
desde dentro de una función de callback de NoteHead, pero la técnica
no se limita a las cabezas de nota. Sin embargo, la función de
callback de NoteHead es especialmente importante, porque es la función
de callback implícita que utiliza la instrucción @code{\\tweak}.
La función de ejemplo que se define abajo (\"display-grobs\") no es
probablemente tan útil, pero muestra que se está accediendo
efectivamente a los grobs.
Salida de ejemplo de la consola:
@example
--------------------
#-Grob Accidental -
#-Grob Arpeggio -
#-Grob Stem -
@end example
"
doctitlees = "Utilizar ly:grob-object para acceder a los grobs con \\tweak"
= "tweaks-and-overrides"
= "
Some grobs can be accessed @qq{laterally} from within another grob's
callback. These are usually listed as @qq{layout objects} in the
@qq{Internal properties} section of a grob-interface. The function
@code{ly:grob-object} is used to access these grobs.
Demonstrated below are some ways of accessing grobs from within a
NoteHead callback, but the technique is not limited to NoteHeads.
However, the NoteHead callback is particularly important, since it is
the implicit callback used by the @code{\\tweak} command.
The example function defined below (\"display-grobs\") is probably not
that useful, but it demonstrates that the grobs are indeed being
accessed.
Example console output:
@example
--------------------
#-Grob Accidental -
#-Grob Arpeggio -
#-Grob Stem -
@end example
"
= "Using ly:grob-object to access grobs with \\tweak"
} % begin verbatim
#(define (notehead-get-accidental notehead)
;; notehead is grob
(ly:grob-object notehead 'accidental-grob))
#(define (notehead-get-arpeggio notehead)
;; notehead is grob
(let ((notecolumn (notehead-get-notecolumn notehead)))
(ly:grob-object notecolumn 'arpeggio)))
#(define (notehead-get-notecolumn notehead)
;; notehead is grob
(ly:grob-parent notehead X))
#(define (notehead-get-stem notehead)
;; notehead is grob
(let ((notecolumn (notehead-get-notecolumn notehead)))
(ly:grob-object notecolumn 'stem)))
#(define (display-grobs notehead)
;; notehead is grob
(let ((accidental (notehead-get-accidental notehead))
(arpeggio (notehead-get-arpeggio notehead))
(stem (notehead-get-stem notehead)))
(format #t "~2&~a\n" (make-string 20 #\-))
(for-each
(lambda (x) (format #t "~a\n" x))
(list accidental arpeggio stem))))
\relative c' {
%% display grobs for each note head:
%\override NoteHead #'before-line-breaking = #display-grobs
<c
%% or just for one:
\tweak #'before-line-breaking #display-grobs
es
g>1\arpeggio
}
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