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3.2.140 spanner-interface

Some objects are horizontally spanned between objects. For example, slurs, beams, ties, etc. These grobs form a subtype called Spanner. All spanners have two span points (these must be Item objects), one on the left and one on the right. The left bound is also the X reference point of the spanner.

User-settable properties:

minimum-length (dimension, in staff space)

Try to make a spanner at least this long, normally in the horizontal direction. This requires an appropriate callback for the springs-and-rods property. If added to a Tie, this sets the minimum distance between noteheads.

minimum-length-after-break (dimension, in staff space)

If set, try to make a broken spanner starting a line this long. This requires an appropriate callback for the springs-and-rods property. If added to a Tie, this sets the minimum distance to the notehead.

normalized-endpoints (pair)

Represents left and right placement over the total spanner, where the width of the spanner is normalized between 0 and 1.

spanner-id (index or symbol)

An identifier to distinguish concurrent spanners.

to-barline (boolean)

If true, the spanner will stop at the bar line just before it would otherwise stop.

Internal properties:

spanner-broken (boolean)

Indicates whether spanner alignment should be broken after the current spanner.

This grob interface is used in the following graphical object(s): BassFigureAlignment, BassFigureAlignmentPositioning, BassFigureContinuation, BassFigureLine, Beam, BendAfter, BendSpanner, CenteredBarNumber, CenteredBarNumberLineSpanner, ChordSquare, ClusterSpanner, DurationLine, DynamicLineSpanner, DynamicTextSpanner, Episema, FingerGlideSpanner, Glissando, GraceSpacing, GridChordName, Hairpin, HorizontalBracket, HorizontalBracketText, InstrumentName, KievanLigature, LedgerLineSpanner, LigatureBracket, LyricExtender, LyricHyphen, LyricSpace, MeasureCounter, MeasureGrouping, MeasureSpanner, MensuralLigature, MultiMeasureRest, MultiMeasureRestNumber, MultiMeasureRestScript, MultiMeasureRestText, OttavaBracket, PercentRepeat, PercentRepeatCounter, PhrasingSlur, PianoPedalBracket, Slur, SostenutoPedalLineSpanner, SpacingSpanner, StaffGrouper, StaffHighlight, StaffSymbol, SustainPedalLineSpanner, System, SystemStartBar, SystemStartBrace, SystemStartBracket, SystemStartSquare, TextSpanner, Tie, TieColumn, TrillSpanner, TupletBracket, TupletNumber, UnaCordaPedalLineSpanner, VaticanaLigature, VerticalAlignment, VerticalAxisGroup, VoiceFollower, VoltaBracket, VoltaBracketSpanner and VowelTransition.

In addition, this interface is supported conditionally by the following objects depending on their class: BalloonText, ControlPoint, ControlPolygon, Footnote and Parentheses.