### 2.1.24 RhythmicStaff

A context like `Staff` but for printing rhythms. Pitches are ignored; the notes are printed on one line.

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

Staff.

This context creates the following layout object(s):

BarLine, DotColumn, InstrumentName, LedgerLineSpanner, StaffSpacing, StaffSymbol, TimeSignature and VerticalAxisGroup.

This context sets the following properties:

- Set grob-property `line-count` in StaffSymbol to `1`.
- Set grob-property `neutral-direction` in Beam to `1`.
- Set grob-property `neutral-direction` in Stem to `1`.
- Set grob-property `staff-padding` in VoltaBracket to `3`.
- Set translator property `createSpacing` to `#t`.
- Set translator property `instrumentName` to `'()`.
- Set translator property `localKeySignature` to `'()`.
- Set translator property `shortInstrumentName` to `'()`.
- Set translator property `squashedPosition` to `0`.

Context RhythmicStaff can contain CueVoice and Voice.

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

> `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 (clef, key signature, etc.) items.

>   > `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 barlines. This engraver is controlled through the `whichBar` property. If it has no bar line to create, it will forbid a linebreak at this point. This engraver is required to trigger the creation of clefs at the start of systems.

>   Properties (read)

>   > `whichBar` (string)

>   >   This property is read to determine what type of bar line to create.

>   >   Example:

>   >   >     \set Staff.whichBar = ".|:"

>   >   This will create a start-repeat bar in this staff only. Valid values are described in ‘`scm/bar-line.scm`’.

>   Properties (write)

>   > `forbidBreak` (boolean)

>   >   If set to `#t`, prevent a line break at this point.

>   This engraver creates the following layout object(s):

>   BarLine.

> `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.

> `Font_size_engraver`

>   Put `fontSize` into `font-size` grob property.

>   Properties (read)

>   > `fontSize` (number)

>   >   The relative size of all grobs in a context.

> `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 (clef, key signature, etc.) items.

>   > `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.

> `Output_property_engraver`

>   Apply a procedure to any grob acknowledged.

>   Music types accepted:

>   apply-output-event

> `Pitch_squash_engraver`

>   Set the vertical position of note heads to `squashedPosition`, if that property is set. This can be used to make a single-line staff demonstrating the rhythm of a melody.

>   Properties (read)

>   > `squashedPosition` (integer)

>   >   Vertical position of squashing for Pitch_squash_engraver.

> `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 the current `CommandColumn` contains items that will affect spacing.

>   This engraver creates the following layout object(s):

>   StaffSpacing.

> `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.

>   Properties (read)

>   > `implicitTimeSignatureVisibility` (vector)

>   >   break visibility for the default time signature.

>   > `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.

#### Internals Reference v2.18.2 (稳定分支).