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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: 6977ddc9a3b63ea810eaecb864269c7d847ccf98
texidoces = "
Al trabajar con los callbacks de un grob, puede ser de mucha ayuda
entender el @qq{árbol genealógico} de un grob. La mayor parte de los
grobs tienen @qq{padres} que influyen en el posicionamiento del grob.
los padres X e Y influyen en las posiciones horizontal y vertical del
grob, respectivamente. Además, cada pade puede tener padres a su vez.
Por desgracia, existen varios aspectos de la genealogía de un grob que
pueden llevar a confusión:
@itemize
@item Los tipos de padre que tiene un grob pueden depender del
contexto.
@item Para ciertos grobs, los padres X e Y son el mismo.
@item Un @qq{ancestro} concreto puede estar relacionado con un grob de
mas de una manera.
@item El concepto de @qq{generaciones} es engañoso.
@end itemize
Por ejemplo, el grob @code{System} puede ser tanto un padre (sobre el
lado Y) como un abuelo (dos veces en el lado X) de un grob
@code{VerticalAlignment}.
Este macro imprime, en la consola, una representación textual de la
genealogía de un grob.
Cuando se llama de esta forma
@example
@{
\\once \\override NoteHead #'before-line-breaking = #display-ancestry
c4
@}
@end example
Se genera la siguiente salida:
@example
------------------------------------
NoteHead X,Y: NoteColumn
X: PaperColumn
X,Y: System
Y: VerticalAxisGroup
X: NonMusicalPaperColumn
X,Y: System
Y: VerticalAlignment
X: NonMusicalPaperColumn
X,Y: System
Y: System
@end example
"
doctitlees = "Imprimir el árbol genealógico de un grob"
= "tweaks-and-overrides"
= "
When working with grob callbacks, it can be helpful to understand a
grob's @qq{ancestry}. Most grobs have @qq{parents} which influence the
positioning of the grob. X- and Y-parents influence the horizontal and
vertical positions for the grob, respectively. Additionally, each
parent may have parents of its own.
Unfortunately, there are several aspects of a grob's ancestry that can
lead to confusion:
@itemize
@item
The types of parents a grob has may depend on context.
@item
For some grobs, the X- and Y-parents are the same.
@item
A particular @qq{ancestor} may be related to a grob in multiple ways.
@item
The concept of @qq{generations} is misleading.
@end itemize
For example, the @code{System} grob can be both parent (on the Y-side)
and grandparent (twice on the X-side) to a @code{VerticalAlignment}
grob.
This macro prints (to the console) a textual representation of a grob's
ancestry.
When called this way
@example
@{
\\once \\override NoteHead #'before-line-breaking = #display-ancestry
c4
@}
@end example
The following output is generated:
@example
------------------------------------
NoteHead X,Y: NoteColumn
X: PaperColumn
X,Y: System
Y: VerticalAxisGroup
X: NonMusicalPaperColumn
X,Y: System
Y: VerticalAlignment
X: NonMusicalPaperColumn
X,Y: System
Y: System
@end example
"
= "Displaying grob ancestry"
} % begin verbatim
#(define (grob-name grob)
(if (ly:grob? grob)
(assoc-ref (ly:grob-property grob 'meta) 'name)
#f))
#(define (get-ancestry grob)
(if (not (null? (ly:grob-parent grob X)))
(list (grob-name grob)
(get-ancestry (ly:grob-parent grob X))
(get-ancestry (ly:grob-parent grob Y)))
(grob-name grob)))
#(define (format-ancestry lst padding)
(string-append
(symbol->string (car lst))
"\n"
(let ((X-ancestry
(if (list? (cadr lst))
(format-ancestry (cadr lst) (+ padding 3))
(symbol->string (cadr lst))))
(Y-ancestry
(if (list? (caddr lst))
(format-ancestry (caddr lst) (+ padding 3))
(symbol->string (caddr lst)))))
(if (equal? X-ancestry Y-ancestry)
(string-append
(format #f "~&")
(make-string padding #\space)
"X,Y: "
(if (list? (cadr lst))
(format-ancestry (cadr lst) (+ padding 5))
(symbol->string (cadr lst))))
(string-append
(format #f "~&")
(make-string padding #\space)
"X: " X-ancestry
"\n"
(make-string padding #\space)
"Y: " Y-ancestry
(format #f "~&"))))
(format #f "~&")))
#(define (display-ancestry grob)
(display
(string-append
(format #f "~3&~a~2%" (make-string 36 #\-))
(format-ancestry (get-ancestry grob) 0)
(format #f "~2&"))))
\relative c' {
\once \override NoteHead #'before-line-breaking = #display-ancestry
f4
\once \override Accidental #'before-line-breaking = #display-ancestry
\once \override Arpeggio #'before-line-breaking = #display-ancestry
<f as c>4\arpeggio
}
|
