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2.1.7 DrumStaff

Handles typesetting for percussion.

This context also accepts commands for the following context(s): Staff.

This context creates the following layout object(s): BarLine, BassFigure, BassFigureAlignment, BassFigureAlignmentPositioning, BassFigureBracket, BassFigureContinuation, BassFigureLine, BreathingSign, CaesuraScript, Clef, ClefModifier, CueClef, CueEndClef, DotColumn, FingeringColumn, InstrumentName, LedgerLineSpanner, NoteCollision, RestCollision, ScriptColumn, ScriptRow, SostenutoPedalLineSpanner, StaffEllipsis, StaffHighlight, StaffSpacing, StaffSymbol, SustainPedalLineSpanner, TimeSignature, UnaCordaPedalLineSpanner and VerticalAxisGroup.

This context sets the following properties:

This is not a ‘Bottom’ context; search for such a one will commence after creating an implicit context of type DrumVoice.

Context DrumStaff can contain CueVoice, DrumVoice and NullVoice.

This context is built from the following engraver(s):

Alteration_glyph_engraver

Set the glyph-name-alist of all grobs having the accidental-switch-interface to the value of the context’s alterationGlyphs property, when defined.

Properties (read)

alterationGlyphs (list)

Alist mapping alterations to accidental glyphs. Alterations are given as exact numbers, e.g., -1/2 for flat. This applies to all grobs that can print accidentals.

Axis_group_engraver

Group all objects created in this context in a VerticalAxisGroup spanner.

Properties (read)

currentCommandColumn (graphical (layout) object)

Grob that is X-parent to all current breakable items (clef, key signature, etc.).

hasAxisGroup (boolean)

True if the current context is contained in an axis group.

keepAliveInterfaces (list)

A list of symbols, signifying grob interfaces that are worth keeping a staff with remove-empty set around for.

Properties (write)

hasAxisGroup (boolean)

True if the current context is contained in an axis group.

This engraver creates the following layout object(s): VerticalAxisGroup.

Bar_engraver

Create bar lines for various commands, including \\bar.

If forbidBreakBetweenBarLines is true, allow line breaks at bar lines only.

Music types accepted: ad-hoc-jump-event, caesura-event, coda-mark-event, dal-segno-event, fine-event, section-event, segno-mark-event and volta-span-event

Properties (read)

caesuraType (list)

An alist 

((bar-line . bar-type)
 (breath . breath-type)
 (scripts . script-type…)
 (underlying-bar-line . bar-type))

specifying which breath mark, bar line, and scripts to create at \caesura. All entries are optional.

bar-line has higher priority than a measure bar line and underlying-bar-line has lower priority than a measure bar line.

caesuraTypeTransform (procedure)

An engraver callback taking three arguments and returning an alist of the same kind as caesuraType.

The first argument is the context.

The second argument is the value of caesuraType with an additional entry (articulations . symbol-list) identifying the articulations attached to the caesura in the music. If the transform function returns this second argument unmodified, it is as if no transform function were set; the function is free to return a different value. The transform function can remove articulations, but any added articulations are ignored.

The third argument is a symbol-list identifying certain things the engraver has observed. bar-line indicates that the engraver has observed a BarLine at the current moment.

doubleRepeatBarType (string)

Bar line to insert where the end of one \repeat volta coincides with the start of another. The default is ‘:..:’.

doubleRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with the end of one \repeat volta and the beginning of another. The default is ‘:|.S.|:’.

endRepeatBarType (string)

Bar line to insert at the end of a \repeat volta. The default is ‘:|.’.

endRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with the end of a \repeat volta. The default is ‘:|.S’.

fineBarType (string)

Bar line to insert at \fine. Where there is also a repeat bar line, the repeat bar line takes precedence and this value is appended to it as an annotation. The default is ‘|.’.

fineSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with \fine. The default is ‘|.S’.

fineStartRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with \fine and the start of a \repeat volta. The default is ‘|.S.|:’.

forbidBreakBetweenBarLines (boolean)

If set to true, Bar_engraver forbids line breaks where there is no bar line.

measureBarType (string)

Bar line to insert at a measure boundary.

repeatCommands (list)

A list of commands related to volta-style repeats. In general, each element is a list, '(command args…), but a command with no arguments may be abbreviated to a symbol; e.g., '((start-repeat)) may be given as '(start-repeat).

end-repeat

End a repeated section.

start-repeat

Start a repeated section.

volta text

If text is markup, start a volta bracket with that label; if text is #f, end a volta bracket.

sectionBarType (string)

Bar line to insert at \section. Where there is also a repeat bar line, the repeat bar line takes precedence and this value is appended to it as an annotation. The default is ‘||’.

segnoBarType (string)

Bar line to insert at an in-staff segno. The default is ‘S’.

segnoStyle (symbol)

A symbol that indicates how to print a segno: bar-line or mark.

startRepeatBarType (string)

Bar line to insert at the start of a \repeat volta. The default is ‘.|:’.

startRepeatSegnoBarType (string)

Bar line to insert where an in-staff segno coincides with the start of a \repeat volta. The default is ‘S.|:’.

underlyingRepeatBarType (string)

Bar line to insert at points of repetition or departure where no bar line would normally appear, for example at the end of a system broken in mid measure where the next system begins with a segno. Where there is also a repeat bar line, the repeat bar line takes precedence and this value is appended to it as an annotation. The default is ‘||’.

whichBar (string)

The current bar line type, or '() if there is no bar line. Setting this explicitly in user code is deprecated. Use \bar or related commands to set it.

Properties (write)

currentBarLine (graphical (layout) object)

Set to the BarLine that Bar_engraver has created in the current timestep.

forbidBreak (boolean)

If set to #t, prevent a line break at this point, except if explicitly requested by the user.

This engraver creates the following layout object(s): BarLine.

Caesura_engraver

Notate a short break in sound that does not shorten the previous note.

Depending on the result of passing the value of caesuraType through caesuraTypeTransform, this engraver may create a BreathingSign with CaesuraScript grobs aligned to it, or it may create CaesuraScript grobs and align them to a BarLine.

If this engraver observes a BarLine, it calls caesuraTypeTransform again with the new information, and if necessary, recreates its grobs.

Music types accepted: caesura-event

Properties (read)

breathMarkDefinitions (list)

The description of breath marks. This is used by the Breathing_sign_engraver. See ‘scm/breath.scm’ for more information.

caesuraType (list)

An alist 

((bar-line . bar-type)
 (breath . breath-type)
 (scripts . script-type…)
 (underlying-bar-line . bar-type))

specifying which breath mark, bar line, and scripts to create at \caesura. All entries are optional.

bar-line has higher priority than a measure bar line and underlying-bar-line has lower priority than a measure bar line.

caesuraTypeTransform (procedure)

An engraver callback taking three arguments and returning an alist of the same kind as caesuraType.

The first argument is the context.

The second argument is the value of caesuraType with an additional entry (articulations . symbol-list) identifying the articulations attached to the caesura in the music. If the transform function returns this second argument unmodified, it is as if no transform function were set; the function is free to return a different value. The transform function can remove articulations, but any added articulations are ignored.

The third argument is a symbol-list identifying certain things the engraver has observed. bar-line indicates that the engraver has observed a BarLine at the current moment.

scriptDefinitions (list)

The description of scripts. This is used by the Script_engraver for typesetting note-superscripts and subscripts. See ‘scm/script.scm’ for more information.

This engraver creates the following layout object(s): BreathingSign and CaesuraScript.

Clef_engraver

Determine and set reference point for pitches.

Properties (read)

clefGlyph (string)

Name of the symbol within the music font.

clefPosition (number)

Where should the center of the clef symbol go, measured in half staff spaces from the center of the staff.

clefTransposition (integer)

Add this much extra transposition. Values of 7 and -7 are common.

clefTranspositionStyle (symbol)

Determines the way the ClefModifier grob is displayed. Possible values are ‘default’, ‘parenthesized’ and ‘bracketed’.

explicitClefVisibility (vector)

‘break-visibility’ function for clef changes.

forbidBreak (boolean)

If set to #t, prevent a line break at this point, except if explicitly requested by the user.

forceBreak (boolean)

Set to #t when an event forcing a line break was heard.

forceClef (boolean)

Show clef symbol, even if it has not changed. Only active for the first clef after the property is set, not for the full staff.

This engraver creates the following layout object(s): Clef and ClefModifier.

Collision_engraver

Collect NoteColumns, and as soon as there are two or more, put them in a NoteCollision object.

This engraver creates the following layout object(s): NoteCollision.

Cue_clef_engraver

Determine and set reference point for pitches in cued voices.

Properties (read)

clefTransposition (integer)

Add this much extra transposition. Values of 7 and -7 are common.

cueClefGlyph (string)

Name of the symbol within the music font.

cueClefPosition (number)

Where should the center of the clef symbol go, measured in half staff spaces from the center of the staff.

cueClefTransposition (integer)

Add this much extra transposition. Values of 7 and -7 are common.

cueClefTranspositionStyle (symbol)

Determines the way the ClefModifier grob is displayed. Possible values are ‘default’, ‘parenthesized’ and ‘bracketed’.

explicitCueClefVisibility (vector)

‘break-visibility’ function for cue clef changes.

forbidBreak (boolean)

If set to #t, prevent a line break at this point, except if explicitly requested by the user.

forceBreak (boolean)

Set to #t when an event forcing a line break was heard.

middleCCuePosition (number)

The position of the middle C, as determined only by the clef of the cue notes. This can be calculated by looking at cueClefPosition and cueClefGlyph.

This engraver creates the following layout object(s): ClefModifier, CueClef and CueEndClef.

Dot_column_engraver

Engrave dots on dotted notes shifted to the right of the note. If omitted, then dots appear on top of the notes.

This engraver creates the following layout object(s): DotColumn.

Figured_bass_engraver

Make figured bass numbers.

Music types accepted: bass-figure-event and rest-event

Properties (read)

figuredBassAlterationDirection (direction)

Where to put alterations relative to the main figure.

figuredBassCenterContinuations (boolean)

Whether to vertically center pairs of extender lines. This does not work with three or more lines.

figuredBassFormatter (procedure)

A routine generating a markup for a bass figure.

ignoreFiguredBassRest (boolean)

Don’t swallow rest events.

implicitBassFigures (list)

A list of bass figures that are not printed as numbers, but only as extender lines.

useBassFigureExtenders (boolean)

Whether to use extender lines for repeated bass figures.

This engraver creates the following layout object(s): BassFigure, BassFigureAlignment, BassFigureBracket, BassFigureContinuation and BassFigureLine.

Figured_bass_position_engraver

Position figured bass alignments over notes.

This engraver creates the following layout object(s): BassFigureAlignmentPositioning.

Fingering_column_engraver

Find potentially colliding scripts and put them into a FingeringColumn object; that will fix the collisions.

This engraver creates the following layout object(s): FingeringColumn.

Font_size_engraver

Put fontSize into font-size grob property.

Properties (read)

fontSize (number)

The relative size of all grobs in a context.

Grob_pq_engraver

Administrate when certain grobs (e.g., note heads) stop playing.

Properties (read)

busyGrobs (list)

A queue of (end-moment . grob) cons cells. This is for internal (C++) use only. This property contains the grobs which are still busy (e.g., note heads, spanners, etc.).

Properties (write)

busyGrobs (list)

A queue of (end-moment . grob) cons cells. This is for internal (C++) use only. This property contains the grobs which are still busy (e.g., note heads, spanners, etc.).

Instrument_name_engraver

Create a system start text for instrument or vocal names.

Properties (read)

currentCommandColumn (graphical (layout) object)

Grob that is X-parent to all current breakable items (clef, key signature, etc.).

instrumentName (markup)

The name to print left of a staff. The instrumentName property labels the staff in the first system, and the shortInstrumentName property labels following lines.

shortInstrumentName (markup)

See instrumentName.

shortVocalName (markup)

Name of a vocal line, short version.

vocalName (markup)

Name of a vocal line.

This engraver creates the following layout object(s): InstrumentName.

Ledger_line_engraver

Create the spanner to draw ledger lines, and notices objects that need ledger lines.

This engraver creates the following layout object(s): LedgerLineSpanner.

Merge_mmrest_numbers_engraver

Engraver to merge multi-measure rest numbers in multiple voices.

This works by gathering all multi-measure rest numbers at a time step. If they all have the same text and there are at least two only the first one is retained and the others are hidden.

Non_musical_script_column_engraver

Find potentially colliding non-musical scripts and put them into a ScriptColumn object; that will fix the collisions.

This engraver creates the following layout object(s): ScriptColumn.

Output_property_engraver

Apply a procedure to any grob acknowledged.

Music types accepted: apply-output-event

Piano_pedal_align_engraver

Align piano pedal symbols and brackets.

Properties (read)

currentCommandColumn (graphical (layout) object)

Grob that is X-parent to all current breakable items (clef, key signature, etc.).

This engraver creates the following layout object(s): SostenutoPedalLineSpanner, SustainPedalLineSpanner and UnaCordaPedalLineSpanner.

Pure_from_neighbor_engraver

Coordinates items that get their pure heights from their neighbors.

Rest_collision_engraver

Handle collisions of rests.

Properties (read)

busyGrobs (list)

A queue of (end-moment . grob) cons cells. This is for internal (C++) use only. This property contains the grobs which are still busy (e.g., note heads, spanners, etc.).

This engraver creates the following layout object(s): RestCollision.

Script_row_engraver

Determine order in horizontal side position elements.

This engraver creates the following layout object(s): ScriptRow.

Separating_line_group_engraver

Generate objects for computing spacing parameters.

Properties (read)

createSpacing (boolean)

Create StaffSpacing objects? Should be set for staves.

Properties (write)

hasStaffSpacing (boolean)

True if currentCommandColumn contains items that will affect spacing.

This engraver creates the following layout object(s): StaffSpacing.

Skip_typesetting_engraver

Create a StaffEllipsis when skipTypesetting is used.

Properties (read)

skipTypesetting (boolean)

If true, no typesetting is done, speeding up the interpretation phase. Useful for debugging large scores.

This engraver creates the following layout object(s): StaffEllipsis.

Staff_collecting_engraver

Maintain the stavesFound variable.

Properties (read)

stavesFound (list of grobs)

A list of all staff-symbols found.

Properties (write)

stavesFound (list of grobs)

A list of all staff-symbols found.

Staff_highlight_engraver

Highlights music passages.

Music types accepted: staff-highlight-event

Properties (read)

currentCommandColumn (graphical (layout) object)

Grob that is X-parent to all current breakable items (clef, key signature, etc.).

This engraver creates the following layout object(s): StaffHighlight.

Staff_symbol_engraver

Create the constellation of five (default) staff lines.

Music types accepted: staff-span-event

This engraver creates the following layout object(s): StaffSymbol.

Time_signature_engraver

Create a TimeSignature whenever timeSignatureFraction changes.

Music types accepted: time-signature-event

Properties (read)

initialTimeSignatureVisibility (vector)

break visibility for the initial time signature.

partialBusy (boolean)

Signal that \partial acts at the current timestep.

timeSignatureFraction (fraction, as pair)

A pair of numbers, signifying the time signature. For example, '(4 . 4) is a 4/4 time signature.

This engraver creates the following layout object(s): TimeSignature.

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LilyPond – Internals Reference v2.23.82 (development-branch).