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3.2.140 staff-symbol-interface

This spanner draws the lines of a staff. A staff symbol defines a vertical unit, the staff space. Quantities that go by a half staff space are called positions. The center (i.e., middle line or space) is position 0. The length of the symbol may be set by hand through the width property.

User-settable properties:

break-align-symbols (list)

A list of break-align symbols that determines which breakable items to align this to. If the grob selected by the first symbol in the list is invisible due to break-visibility, we will align to the next grob (and so on). Choices are listed in break-alignment-interface.

ledger-extra (dimension, in staff space)

Extra distance from staff line to draw ledger lines for.

ledger-line-thickness (pair of numbers)

The thickness of ledger lines. It is the sum of 2 numbers: The first is the factor for line thickness, and the second for staff space. Both contributions are added.

ledger-positions (list)

Vertical positions of ledger lines. When set on a StaffSymbol grob it defines a repeating pattern of ledger lines and any parenthesized groups will always be shown together.

ledger-positions-function (any type)

A quoted Scheme procedure that takes a StaffSymbol grob and the vertical position of a note head as arguments and returns a list of ledger line positions.

line-count (integer)

The number of staff lines.

line-positions (list)

Vertical positions of staff lines.

staff-space (dimension, in staff space)

Amount of space between staff lines, expressed in global staff-space.

thickness (number)

For grobs made up of lines, this is the thickness of the line. For slurs and ties, this is the distance between the two arcs of the curve’s outline at its thickest point, not counting the diameter of the virtual “pen” that draws the arcs. This property is expressed as a multiple of the current staff-line thickness (i.e., the visual output is influenced by changes to Staff.StaffSymbol.thickness).

widened-extent (pair of numbers)

The vertical extent that a bar line on a certain staff symbol should have. If the staff symbol is small (e.g., has just one line, as in a RhythmicStaff, this is wider than the staff symbol’s Y extent.

width (dimension, in staff space)

The width of a grob measured in staff space.

This grob interface is used in the following graphical object(s): StaffSymbol.