paper-column-interface - LilyPond program-reference
Description: LilyPond program-reference

Next: parentheses-interface, Previous: ottava-bracket-interface, Up: Graphical Object Interfaces

#### paper-column-interface

`Paper_column` objects form the top-most X-parents for items. The are two types of columns: musical columns, where are attached to, and non-musical columns, where bar-lines, clefs etc. are attached to. The spacing engine determines the X-positions of these objects.

They are numbered, the first (leftmost) is column 0. Numbering happens before line-breaking, and columns are not renumbered after line breaking. Since many columns go unused, you should only use the rank field to get ordering information. Two adjacent columns may have non-adjacent numbers.

##### User settable properties:

`between-cols` (pair)
  Where to attach a loose column to
`line-break-system-details` (list)
  Alist of properties to use when this column is the start of a system.
`page-penalty` (number)
  Penalty for page break at this column. 10000 or more means forbid linebreak, -10000 or less means force page break. Other values influence page breaking decisions as a real penalty.
`shortest-playing-duration` (moment)
  The duration of the shortest playing here.
`shortest-starter-duration` (moment)
  The duration of the shortest note that starts here.
`used` (boolean)
  If set, this spacing column is kept in the spacing problem
`when` (moment)
  Global time step associated with this column happen?

##### Internal properties:

`bounded-by-me` (unknown)
  list of spanners that have this column as start/begin point. Only columns that have grobs or act as bounds are spaced.

This grob interface is used in the following graphical objects: NonMusicalPaperColumn, NonMusicalPaperColumn, PaperColumn and PaperColumn

This page is for LilyPond-2.8.8 (stable-branch).

Other languages: English.
Using automatic language selection.