@node Interfaces for programmers
@chapter Interfaces for programmers
Advanced tweaks may be performed by using Scheme. If you are
not familiar with Scheme, you may wish to read our
@node Interfaces for programmers
@chapter Interfaces for programmers
Advanced tweaks may be performed by using Scheme. If you are
not familiar with Scheme, you may wish to read our
@code{'void} property set to @code{#t}, the parser is told to
actually disregard this returned music
expression. Thus the important part of the void music function is the
@code{'void} property set to @code{#t}, the parser is told to
actually disregard this returned music
expression. Thus the important part of the void music function is the
#@{ \once \override Score.BarNumber #'break-visibility = ##f #@}
#@{#@}))
@end example
To actually display bar numbers where this function is called,
#@{ \once \override Score.BarNumber #'break-visibility = ##f #@}
#@{#@}))
@end example
To actually display bar numbers where this function is called,
the dummy statement in the above example, the @code{newLa} definition
is executed before @code{traLaLa} is defined, leading to a syntax
error.
the dummy statement in the above example, the @code{newLa} definition
is executed before @code{traLaLa} is defined, leading to a syntax
error.
@item
music name: Each music expression has a name. For example, a note
leads to a @internalsref{NoteEvent}, and @code{\simultaneous} leads to
a @internalsref{SimultaneousMusic}. A list of all expressions
@item
music name: Each music expression has a name. For example, a note
leads to a @internalsref{NoteEvent}, and @code{\simultaneous} leads to
a @internalsref{SimultaneousMusic}. A list of all expressions
interfaces, for example, a note is an @code{event}, but it is also a
@code{note-event}, a @code{rhythmic-event}, and a
@code{melodic-event}. All classes of music are listed in the
interfaces, for example, a note is an @code{event}, but it is also a
@code{note-event}, a @code{rhythmic-event}, and a
@code{melodic-event}. All classes of music are listed in the
@subsection Doubling a note with slurs (example)
Suppose we want to create a function which translates
@subsection Doubling a note with slurs (example)
Suppose we want to create a function which translates
(the @code{'elements}, @code{'duration}, @code{'pitch}, etc, that we
see in the @code{\displayMusic} output above). The new value is the
former elements property, with an extra item: the
(the @code{'elements}, @code{'duration}, @code{'pitch}, etc, that we
see in the @code{\displayMusic} output above). The new value is the
former elements property, with an extra item: the
want: the same list as before, plus the new @code{ArticulationEvent}
expression. The order inside the elements property is not important here.
want: the same list as before, plus the new @code{ArticulationEvent}
expression. The order inside the elements property is not important here.
The markup-list argument of commands such as @code{#:line},
@code{#:center}, and @code{#:column} cannot be a variable or
The markup-list argument of commands such as @code{#:line},
@code{#:center}, and @code{#:column} cannot be a variable or
Note: there is now an internal command @code{\smallCaps} which can
be used to set text in small caps. See
Note: there is now an internal command @code{\smallCaps} which can
be used to set text in small caps. See
is not found, the default value is @code{2}. Then, a list of justified
lines is made using the @code{make-justified-lines-markup-list}
function, which is related to the @code{\justified-lines}
is not found, the default value is @code{2}. Then, a list of justified
lines is made using the @code{make-justified-lines-markup-list}
function, which is related to the @code{\justified-lines}
-built-in markup list command. An horizontal space is added at the
-begining using the @code{make-hspace-markup} function. Finally, the
+built-in markup list command. An horizontal space is added at the
+beginning using the @code{make-hspace-markup} function. Finally, the
@}
\override-lines #'(par-indent . 4) \paragraph @{
The plate would be inked, the depressions caused by the cutting
@}
\override-lines #'(par-indent . 4) \paragraph @{
The plate would be inked, the depressions caused by the cutting
- and stamping would hold ink. An image was formed by pressing paper
- to the plate. The stamping and cutting was completely done by
+ and stamping would hold ink. An image was formed by pressing paper
+ to the plate. The stamping and cutting was completely done by
When interpreted, the function @var{proc} is called for every layout
object found in the context @var{context}, with the following
arguments:
When interpreted, the function @var{proc} is called for every layout
object found in the context @var{context}, with the following
arguments:
@item the layout object itself,
@item the context where the layout object was created, and
@item the context where @code{\applyOutput} is processed.
@item the layout object itself,
@item the context where the layout object was created, and
@item the context where @code{\applyOutput} is processed.
@noindent
In this example, both @code{ly:self-alignment-interface::x-aligned-on-self} and
@code{ly:self-alignment-interface::centered-on-x-parent} are called
@noindent
In this example, both @code{ly:self-alignment-interface::x-aligned-on-self} and
@code{ly:self-alignment-interface::centered-on-x-parent} are called
-with the grob as argument. The results are added with the @code{+}
-function. To ensure that this addition is properly executed, the whole
+with the grob as argument. The results are added with the @code{+}
+function. To ensure that this addition is properly executed, the whole
thing is enclosed in @code{ly:make-simple-closure}.
In fact, using a single procedure as property value is equivalent to
thing is enclosed in @code{ly:make-simple-closure}.
In fact, using a single procedure as property value is equivalent to