@node Line styles
@subsection Line styles
-Valentin: write stuff here.
+@c TODO: split the following explanations between expressive marks and
+@c text-related stuff. Perhaps create a new subsection named
+@c "Spanner limits", "Spanner boundaries"? -vv
+
+Some performance indications, e.g., @i{rallentando} and
+@i{accelerando} and @i{trills} are written as text and are
+extended over many measures with lines, sometimes dotted or wavy.
+
+These all use the same routines as the glissando for drawing the
+texts and the lines, and tuning their behavior is therefore also
+done in the same way. It is done with a spanner, and the routine
+responsible for drawing the spanners is
+@code{ly:line-interface::print}. This routine determines the
+exact location of the two @i{span points} and draws a line in
+between, in the style requested.
+
+Here is an example of the different line styles available, and how
+to tune them.
+
+@lilypond[relative=2,ragged-right,verbatim,fragment]
+d2 \glissando d'2
+\once \override Glissando #'style = #'dashed-line
+d,2 \glissando d'2
+\override Glissando #'style = #'dotted-line
+d,2 \glissando d'2
+\override Glissando #'style = #'zigzag
+d,2 \glissando d'2
+\override Glissando #'style = #'trill
+d,2 \glissando d'2
+@end lilypond
+
+The information that determines the end-points is computed
+on-the-fly for every graphic object, but it is possible to
+override these.
+
+@lilypond[relative=2,ragged-right,verbatim,fragment]
+e2 \glissando f
+\once \override Glissando #'bound-details #'right #'Y = #-2
+e2 \glissando f
+@end lilypond
+
+The @code{Glissando} object, like any other using the
+@code{ly:line-interface::print} routine, carries a nested
+association list. In the above statement, the value for @code{Y}
+is set to @code{-2} for the association list corresponding to the
+right end point. Of course, it is also possible to adjust the
+left side with @code{left} instead of @code{right}.
+
+If @code{Y} is not set, the value is computed from the vertical
+position of right attachment point of the spanner.
+
+In case of a line break, the values for the span-points are
+extended with contents of the @code{left-broken} and
+@code{right-broken} sublists, for example
+
+@lilypond[relative=2,ragged-right,verbatim,fragment]
+\override Glissando #'breakable = ##T
+\override Glissando #'bound-details #'right-broken #'Y = #-3
+c1 \glissando \break
+f1
+@end lilypond
+
+The following properties can be used for the
+
+@table @code
+@item Y
+This sets the Y-coordinate of the end point, in staff space. By
+default, it is the center of the bound object, so for a glissando
+it points to the vertical center of the note head.
+
+For horizontal spanners, such as text spanner and trill spanners,
+it is hardcoded to 0.
+
+@item attach-dir
+This determines where the line starts and ends in X-direction,
+relative to the bound object. So, a value of @code{-1} (or
+@code{LEFT}) makes the line start/end at the left side of the note
+head it is attached to.
+
+@item X
+This is the absolute coordinate of the end point. It is usually
+computed on the fly, and there is little use in overriding it.
+
+@item stencil
+Line spanners may have symbols at the beginning or end, which is
+contained in this sub-property. This is for internal use, it is
+recommended to use @code{text}.
+
+@item text
+This is a markup that is evaluated to yield stencil. It is used
+to put @i{cresc.} and @i{tr} on horizontal spanners.
+
+@lilypond[quote,ragged-right,fragment,relative=2,verbatim]
+\override TextSpanner #'bound-details #'left #'text
+ = \markup { \small \bold Slower }
+c2\startTextSpan b c a\stopTextSpan
+@end lilypond
+
+@item stencil-align-dir-y
+@item stencil-offset
+Without setting this, the stencil is simply put there at the
+end-point, as defined by the @code{X} and @code{Y} sub properties.
+Setting either @code{stencil-align-dir-y} or @code{stencil-offset}
+will move the symbol at the edge relative to the end point of the
+line
+
+@lilypond[relative=1,fragment,verbatim]
+\override TextSpanner #'bound-details
+ #'left #'stencil-align-dir-y = #DOWN
+\override TextSpanner #'bound-details
+ #'right #'stencil-align-dir-y = #UP
+
+\override TextSpanner #'bound-details
+ #'left #'text = #"gggg"
+\override TextSpanner #'bound-details
+ #'right #'text = #"hhhh"
+c4^\startTextSpan c c c \stopTextSpan
+@end lilypond
+
+@item arrow
+Setting this sub property to @code{#t} produce an arrowhead at the
+end of the line.
+
+@item padding
+This sub property controls the space between the specified
+end-point of the line and the actual end. Without padding, a
+glissando would start and end in the center of each note head.
+
+@end table
+
+FIXME: should this be in NR 3?
+
+The music function \endSpanners terminates spanners and hairpins
+after exactly one note.
+
+@lilypond[verbatim,quote,ragged-right,relative=2,fragment]
+\endSpanners
+c2 \startTextSpan c2
+c2 \< c2
+@end lilypond
+
+When using \endSpanners it is not necessary to close
+\startTextSpan with \stopTextSpan, nor is it necessary to close
+hairpins with \!.
+
+
+
+@seealso
+
+Internals Reference: @internalsref{TextSpanner},
+@internalsref{Glissando}, @internalsref{VoiceFollower},
+@internalsref{TrillSpanner},
+@internalsref{line-spanner-interface}.
+
@node Controlling visibility of objects
\mark "D.S. al Fine "
@end lilypond
-Text marks may be aligned with notation objects other than bar
-lines,
+If specified, text marks may be aligned with notation objects
+other than bar lines. These objects include @code{ambitus},
+@code{breathing-sign}, @code{clef}, @code{custos},
+@code{staff-bar}, @code{left-edge}, @code{key-cancellation},
+@code{key-signature}, and @code{time-signature}.
-@lilypond[fragment,quote,ragged-right,verbatim,relative=2]
-\relative {
- c1
- \key cis \major
- \clef alto
- \override Score.RehearsalMark #'break-align-symbols = #'(key-signature)
- \mark "on key"
- cis
- \key ces \major
+
+In such cases, text marks will be, by default, horizontally centered
+above the object. However, this can be changed, as demonstrated
+on the second line of this example (in a score with multiple staves,
+this setting should be done for all the staves).
+
+
+@lilypond[fragment,quote,ragged-right,verbatim,relative=1]
+ e1
+
+ % the RehearsalMark will be centered above the Clef
\override Score.RehearsalMark #'break-align-symbols = #'(clef)
+ \key a \major
\clef treble
- \mark "on clef"
- ces
+ \mark "↓"
+ e
+
+ % the RehearsalMark will be centered above the TimeSignature
\override Score.RehearsalMark #'break-align-symbols = #'(time-signature)
- \key d \minor
- \clef tenor
+ \key a \major
+ \clef treble
\time 3/4
- \mark "on time"
- c
-}
-@end lilypond
-
-Possible symbols for the @code{break-align-symbols} list are
-@code{ambitus}, @code{breathing-sign}, @code{clef}, @code{custos},
-@code{staff-bar}, @code{left-edge}, @code{key-cancellation},
-@code{key-signature}, and @code{time-signature}.
-
-The text marks will, by default, be aligned with the middle of the
-notation object, but this can be changed by overriding the
-@code{break-align-anchor-alignment} and @code{break-align-anchor}
-properties for the appropriate grob. For scores with multiple staves,
-this setting should be done for all the staves.
-
-@lilypond[fragment,quote,ragged-right,verbatim]
-{
+ \mark "↓"
+ e2.
+
+ % the RehearsalMark will be centered above the KeySignature
\override Score.RehearsalMark #'break-align-symbols = #'(key-signature)
- c1
- \key cis \major
+ \key a \major
+ \clef treble
+ \time 4/4
+ \mark "↓"
+ e1
+ \break
+ e
+
% the RehearsalMark will be aligned with the left edge of the KeySignature
\once \override Score.KeySignature #'break-align-anchor-alignment = #LEFT
- \mark \default
- cis1
- \key ces \major
-
+ \mark "↓"
+ \key a \major
+ e
+
% the RehearsalMark will be aligned with the right edge of the KeySignature
\once \override Score.KeySignature #'break-align-anchor-alignment = #RIGHT
- \mark \default
- ces1
- \key cis \major
-
+ \key a \major
+ \mark "↓"
+ e
+
% the RehearsalMark will be aligned with the left edge of the KeySignature
- % and then shifted right by 2 units.
- \once \override Score.KeySignature #'break-align-anchor = #2
- \mark \default
- ces1
-}
+ % and then shifted right by 1 unit.
+ \once \override Score.KeySignature #'break-align-anchor = #1
+ \key a \major
+ \mark "↓"
+ e1
@end lilypond
Although text marks are normally only printed above the topmost
Snippets: @lsrdir{Text,Text}
-@node Text and line spanners
-@subsubsection Text and line spanners
-
-@c FIXME: this whole section has to be removed.
-@c glissando stuff should go into Expressive marks;
-@c Text spanners should go into... Text spanners.
-@c (I'm on it) --vv
-
-Some performance indications, e.g., @i{rallentando} and
-@i{accelerando} and @i{trills} are written as text and are
-extended over many measures with lines, sometimes dotted or wavy.
-
-These all use the same routines as the glissando for drawing the
-texts and the lines, and tuning their behavior is therefore also
-done in the same way. It is done with a spanner, and the routine
-responsible for drawing the spanners is
-@code{ly:line-interface::print}. This routine determines the
-exact location of the two @i{span points} and draws a line in
-between, in the style requested.
-
-Here is an example of the different line styles available, and how
-to tune them.
-
-@lilypond[relative=2,ragged-right,verbatim,fragment]
-d2 \glissando d'2
-\once \override Glissando #'style = #'dashed-line
-d,2 \glissando d'2
-\override Glissando #'style = #'dotted-line
-d,2 \glissando d'2
-\override Glissando #'style = #'zigzag
-d,2 \glissando d'2
-\override Glissando #'style = #'trill
-d,2 \glissando d'2
-@end lilypond
-
-The information that determines the end-points is computed
-on-the-fly for every graphic object, but it is possible to
-override these.
-
-@lilypond[relative=2,ragged-right,verbatim,fragment]
-e2 \glissando f
-\once \override Glissando #'bound-details #'right #'Y = #-2
-e2 \glissando f
-@end lilypond
-
-The @code{Glissando} object, like any other using the
-@code{ly:line-interface::print} routine, carries a nested
-association list. In the above statement, the value for @code{Y}
-is set to @code{-2} for the association list corresponding to the
-right end point. Of course, it is also possible to adjust the
-left side with @code{left} instead of @code{right}.
-
-If @code{Y} is not set, the value is computed from the vertical
-position of right attachment point of the spanner.
-
-In case of a line break, the values for the span-points are
-extended with contents of the @code{left-broken} and
-@code{right-broken} sublists, for example
-
-@lilypond[relative=2,ragged-right,verbatim,fragment]
-\override Glissando #'breakable = ##T
-\override Glissando #'bound-details #'right-broken #'Y = #-3
-c1 \glissando \break
-f1
-@end lilypond
-
-The following properties can be used for the
-
-@table @code
-@item Y
-This sets the Y-coordinate of the end point, in staff space. By
-default, it is the center of the bound object, so for a glissando
-it points to the vertical center of the note head.
-
-For horizontal spanners, such as text spanner and trill spanners,
-it is hardcoded to 0.
-
-@item attach-dir
-This determines where the line starts and ends in X-direction,
-relative to the bound object. So, a value of @code{-1} (or
-@code{LEFT}) makes the line start/end at the left side of the note
-head it is attached to.
-
-@item X
-This is the absolute coordinate of the end point. It is usually
-computed on the fly, and there is little use in overriding it.
-
-@item stencil
-Line spanners may have symbols at the beginning or end, which is
-contained in this sub-property. This is for internal use, it is
-recommended to use @code{text}.
-
-@item text
-This is a markup that is evaluated to yield stencil. It is used
-to put @i{cresc.} and @i{tr} on horizontal spanners.
-
-@lilypond[quote,ragged-right,fragment,relative=2,verbatim]
-\override TextSpanner #'bound-details #'left #'text
- = \markup { \small \bold Slower }
-c2\startTextSpan b c a\stopTextSpan
-@end lilypond
-
-@item stencil-align-dir-y
-@item stencil-offset
-Without setting this, the stencil is simply put there at the
-end-point, as defined by the @code{X} and @code{Y} sub properties.
-Setting either @code{stencil-align-dir-y} or @code{stencil-offset}
-will move the symbol at the edge relative to the end point of the
-line
-
-@lilypond[relative=1,fragment,verbatim]
-\override TextSpanner #'bound-details
- #'left #'stencil-align-dir-y = #DOWN
-\override TextSpanner #'bound-details
- #'right #'stencil-align-dir-y = #UP
-
-\override TextSpanner #'bound-details
- #'left #'text = #"gggg"
-\override TextSpanner #'bound-details
- #'right #'text = #"hhhh"
-c4^\startTextSpan c c c \stopTextSpan
-@end lilypond
-
-@item arrow
-Setting this sub property to @code{#t} produce an arrowhead at the
-end of the line.
-
-@item padding
-This sub property controls the space between the specified
-end-point of the line and the actual end. Without padding, a
-glissando would start and end in the center of each note head.
-
-@end table
-
-TODO: add this somewhere
-
-@verbatim
-\new Staff {
- \override TextSpanner #'bound-details #'left-broken #'text = ##f
- \override TextSpanner #'bound-details #'left #'text = \markup {
-"start" }
- c'1 \startTextSpan \break
- c'1
- c'1 \stopTextSpan
-}
-@end verbatim
-
-
-The music function \endSpanners terminates spanners and hairpins
-after exactly one note.
-
-@lilypond[verbatim,quote,ragged-right,relative=2,fragment]
-\endSpanners
-c2 \startTextSpan c2
-c2 \< c2
-@end lilypond
-
-When using \endSpanners it is not necessary to close
-\startTextSpan with \stopTextSpan, nor is it necessary to close
-hairpins with \!.
-
-
-
-@seealso
-
-Snippets: @lsrdir{Text,Text}
-
-Internals Reference: @internalsref{TextSpanner},
-@internalsref{Glissando}, @internalsref{VoiceFollower},
-@internalsref{TrillSpanner},
-@internalsref{line-spanner-interface}.
-
-
-
-
-
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