Guide, node Updating translation committishes..
@end ignore
-@c \version "2.15.20"
+@c \version "2.15.39"
@node Changing defaults
@chapter Changing defaults
* Context layout order::
@end menu
-
@seealso
Learning Manual:
@rlearning{Contexts and engravers}.
@c TODO Should this be Modifying engravers or Modifying contexts?
-Notation contexts (like @code{Score} and @code{Staff}) not only
-store properties,
-they also contain plug-ins called @q{engravers} that create notation
-elements. For example, the @code{Voice} context contains a
+Notation contexts (like @code{Score} and @code{Staff}) not only store
+properties, they also contain plug-ins called @q{engravers} that create
+notation elements. For example, the @code{Voice} context contains a
@code{Note_heads_engraver} and the @code{Staff} context contains a
-@code{Key_signature_engraver}.
+@code{Key_engraver}.
For a full a description of each plug-in, see
@ifhtml
contain it. This can give rise to unexpected new staves or scores.
@seealso
-Usage Manual:
+Application Usage:
@rprogram{An extra staff appears}.
Installed Files:
@file{ly/engraver-init.ly}.
-
@node Explaining the Internals Reference
@section Explaining the Internals Reference
-
@menu
* Navigating the program reference::
* Layout interfaces::
@end ignore
@seealso
-Internals:
+Internals Reference:
@rinternals{Backend},
@rinternals{All layout objects},
@rinternals{OverrideProperty},
@rinternals{RevertProperty},
@rinternals{PropertySet}.
-
@knownissues
-
The back-end is not very strict in type-checking object properties.
Cyclic references in Scheme values for properties can cause hangs
or crashes, or both.
-
@node The set command
@subsection The @code{@bs{}set} command
@end ifnothtml
@seealso
-
Internals Reference:
-
@rinternals{Tunable context properties}.
-
@cindex grob properties
@cindex properties, grob
@funindex \override
@end ignore
@seealso
-
Internals Reference:
@rinternals{Backend}
+
@node The tweak command
@subsection The @code{\tweak} command
syntax:
@example
-\tweak #'@code{grob-property} #@code{value}
+\tweak @var{layout-object} #'@var{grob-property} @var{value}
@end example
-The @code{\tweak} command applies to the object that immediately
-follows @code{value} in the music stream.
+Specifying @var{layout-object} is optional.
+The @code{\tweak} command applies to the music object that immediately
+follows @var{value} in the music stream.
@ignore
In some cases, it is possible to take a short-cut for tuning
For the @code{\tweak} command to work, it must
remain immediately adjacent to the object to which it is
to apply after the input file has been converted to a music stream.
-At times, LilyPond may insert additional items into the music stream
-during the parsing process. For example, when a note that is not
-explicitly part of a chord will be placed in a chord by LilyPond,
-so notes to be modified with @code{\tweak} must be placed inside
-a chord construct:
+Tweaking a whole chord does not do anything since its music event
+only acts as a container, and all layout objects are created from events
+inside of the @code{EventChord}:
@lilypond[relative=2,verbatim,quote]
\tweak #'color #red c4
-<\tweak #'color #red c>4
+\tweak #'color #red <c e>4
+<\tweak #'color #red c e>4
+@end lilypond
+
+The simple @code{\tweak} command cannot be used to modify any object
+that is not directly created from the input. In particular
+it will not affect stems, automatic
+beams or accidentals, since these are generated later by
+\@code{NoteHead} layout objects rather than by music elements in the
+input stream.
+
+Such indirectly created layout objects can be tweaked using the explicit
+form of the @code{\tweak} command:
+
+@lilypond[relative=2,verbatim,quote]
+\tweak Stem #'color #red
+\tweak Beam #'color #green c8 e
+<c e \tweak Accidental #'font-size #-3 ges>4
@end lilypond
-The @code{\tweak} command cannot be used to modify any item
-that does not appear explicitly in the input file. In particular
-it cannot be used to modify stems,
-beams or accidentals directly, since these are generated later by
-note heads, rather than by music elements in the input stream.
-Nor can @code{\tweak} be used to modify clefs or time
+@code{\tweak} cannot be used to modify clefs or time
signatures, since these become separated from any preceding
@code{\tweak} command in the input stream by the automatic
insertion of extra elements required to specify the context.
in determining how to adjust the input to make a @code{\tweak}
apply.
-
@seealso
Learning Manual:
@rlearning{Tweaking methods}.
-Extending:
+Extending LilyPond:
@rextend{Displaying music expressions}.
-
@knownissues
-@cindex tweaks in a variable
-The @code{\tweak} command cannot be used inside a variable.
-
-@cindex tweaks in lyrics
-The @code{\tweak} commands cannot be used in @code{\lyricmode}.
-
@cindex tweaking control points
@cindex control points, tweaking
The @code{\tweak} command will apply to only the first of several
generated ties in a chord.
+
@node set versus override
@subsection @code{\set} vs. @code{\override}
@strong{The direction property}
-The position or direction of many layout objects is controlled
-by the @code{direction} property.
+The position or direction of many layout objects is controlled by the
+@code{direction} property.
-The value of the @code{direction} property may be
-set to @code{1}, meaning @qq{up} or @qq{above}, or to @w{@code{-1}},
-meaning @qq{down} or @qq{below}. The symbols @code{UP} and
-@code{DOWN} may be used instead of @code{1} and @w{@code{-1}}
-respectively. The default direction may be specified by setting
-@code{direction} to @code{0} or @code{CENTER}. Alternatively,
-in many cases predefined commands
-exist to specify the direction. These are all of the form
+The value of the @code{direction} property may be set to @code{1},
+meaning @qq{up} or @qq{above}, or to @w{@code{-1}}, meaning @qq{down} or
+@qq{below}. The symbols @code{UP} and @code{DOWN} may be used instead
+of @code{1} and @w{@code{-1}} respectively. The default direction may
+be specified by setting @code{direction} to @code{0} or @code{CENTER}.
+Alternatively, in many cases predefined commands exist to specify the
+direction. These are of the form
-@noindent
-@code{\xxxUp}, @code{xxxDown}, @code{xxxNeutral}
+@example
+@code{\xxxUp}, @code{\xxxDown} or @code{\xxxNeutral}
+@end example
@noindent
-where @code{xxxNeutral} means @qq{use the default direction}.
+where @code{\xxxNeutral} means @qq{use the default} direction.
See @rlearning{Within-staff objects}.
-In a few cases, arpeggio being the only common example, the value
-of the @code{direction} property specifies whether the object
-is to be placed to the right or left of the parent object. In
-this case @w{@code{-1}} or @code{LEFT} means @qq{to the left} and
-@code{1} or @code{RIGHT} means @qq{to the right}. @code{0}
-or @code{CENTER} means @qq{use the default} direction, as before.
+In a few cases, arpeggio for example, the value of the @code{direction}
+property can specify whether the object is to be placed to the right or
+left of the parent. In this case @w{@code{-1}} or @code{LEFT} means
+@qq{to the left} and @code{1} or @code{RIGHT} means @qq{to the right}.
+@code{0} or @code{CENTER} means @qq{use the default} direction.
@ignore
These all have side-axis set to #X
c2( c)
@end lilypond
+In polyphonic music, it is generally better to specify an explicit
+@code{voice} than change an object's direction. For more information.
+See @ref{Multiple voices}.
+
+@seealso
+Learning Manual:
+@rlearning{Within-staff objects}.
+
+Notation Reference:
+@ref{Multiple voices}.
+
@node Distances and measurements
@subsection Distances and measurements
@code{staff-space}. For an explanation and an example of its use,
see @rlearning{Length and thickness of objects}.
-
@seealso
Learning Manual:
@rlearning{Length and thickness of objects}.
\startTextSpan with \stopTextSpan, nor is it necessary to close
hairpins with @code{\!}.
-
@seealso
Internals Reference:
@rinternals{TextSpanner},
property controls both the clef symbol and any octavation symbol
associated with it.
-
@seealso
Learning Manual:
-@rlearning{Visibility and color of objects}
+@rlearning{Visibility and color of objects}.
@node Line styles
* Unpure-pure containers::
@end menu
-
@seealso
Learning Manual:
@rlearning{Tweaking output},
@ref{Explaining the Internals Reference},
@ref{Modifying properties}.
+Extending LilyPond:
+@rextend{Interfaces for programmers}.
+
Installed Files:
@file{scm/define-grobs.scm}.
Snippets:
@rlsr{Tweaks and overrides}.
-Extending:
-@rextend{Interfaces for programmers}.
-
Internals Reference:
@rinternals{All layout objects}.
for positioning rehearsal marks on such objects.
@seealso
-@ref{Using the break-alignable-interface},
+Notation Reference:
+@ref{Using the break-alignable-interface}.
+
+Extending LilyPond:
@rextend{Callback functions}.
@menu
@c TODO Add inserting Postscript or ref to later
-
@seealso
Notation Reference:
@ref{Graphic notation inside markup},
@cindex unpure containers, Scheme
@cindex horizontal spacing, overriding
+
@node Unpure-pure containers
@subsection Unpure-pure containers
@ref{Predefined type predicates}. User-defined type predicates
are also allowed.
-
@seealso
-
Notation Reference:
@ref{Predefined type predicates}.
-Extending:
+Extending Lilypond:
@rextend{Music functions}.
Installed Files:
In addition to numbers, we can use music expressions such
as notes for arguments to music functions:
-@c TODO: use a better example (the music argument is redundant).
-
@lilypond[quote,verbatim,ragged-right]
custosNote =
#(define-music-function
(parser location note)
(ly:music?)
#{
- \once \override Voice.NoteHead #'stencil =
- #ly:text-interface::print
- \once \override Voice.NoteHead #'text =
- \markup \musicglyph #"custodes.mensural.u0"
- \once \override Voice.Stem #'stencil = ##f
+ \tweak NoteHead #'stencil #ly:text-interface::print
+ \tweak NoteHead #'text
+ \markup \musicglyph #"custodes.mensural.u0"
+ \tweak Stem #'stencil ##f
$note
#})
tempoPadded =
#(define-music-function
(parser location padding tempotext)
- (number? string?)
+ (number? markup?)
#{
\once \override Score.MetronomeMark #'padding = #padding
\tempo \markup { \bold #tempotext }
\relative c'' {
\tempo \markup { "Low tempo" }
c4 d e f g1
- \tempoPadded #4.0 #"High tempo"
+ \tempoPadded #4.0 "High tempo"
g4 f e d c1
}
@end lilypond
projects / lilypond.git / blobdiff