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LineOfScore

LineOfScore grobs are created by: Score_engraver

axis-group-interface

a group of coupled grobs

axes (list):

list of axis numbers. In the case of alignment grobs, this should contain only one number. Default value: '(0 1)

line-of-score-interface

Super grob, parent of all:

The columns of a score that form one line. The toplevel grob. Any grob has a Line_of_score as both X and Y reference point. The Paper_score contains one grob of this type. Control enters the Grob dependency calculation from this single Line_of_score object.

between-system-string (string):

string to dump between two systems. Useful for forcing pagebreaks. Default value: (unset)

spacing-procedure (procedure):

procedure taking grob as argument. This is called after before-line-breaking-callback, but before the actual line breaking itself. Return value is ignored. Default value: (unset)

before-line-breaking-callback (procedure):

Procedure taking grob as argument. This procedure is called (using dependency resolution) before line breaking, but after generating discretionary items. Return value is ignored. Default value: (unset)

after-line-breaking-callback (procedure):

Procedure taking a grob as argument. This procedure is called (using dependency resolution) after line breaking. Return value is ignored. Default value: (unset)

all-elements (list):

list of all grobs in this line. Needed for protecting grobs from GC. Default value: (unset)

columns (list):

list of grobs, typically containing paper-columns, list of note-columns. Default value: (unset)

general-grob-interface

All grobs support this

X-offset-callbacks (list):

list of functions, each taking an grob and axis argument. The function determine the position relative to this grob's parent. The last one in the list is called first. Default value: (unset)

Y-offset-callbacks (list):

see X-offset-callbacks. Default value: (unset)

X-extent-callback (procedure):

procedure taking an grob and axis argument, returning a number-pair. The return value is the extent of the grob. Default value: (unset)

Y-extent-callback (procedure):

see X-extent-callback. Default value: (unset)

molecule-callback (procedure):

Function taking grob as argument, returning a Scheme encoded Molecule. Default value: (unset)

font-relative-size (number):

partial font definition: the relative size compared the `normal' size. 0 is style-sheet's normal size, -1 is smaller, +1 is bigger, -1 is smaller. Default value: (unset)

extra-offset (pair of numbers):

pair of reals (a cons) forcing an extra offset before outputting. extra-offset is added just before `printing' the grob, so the typesetting engine is completely oblivious to it.

Default value: (unset)

interfaces (list):

list of symbols indicating the interfaces supported by this object. Is initialized from the meta field. Default value: (unset)

dependencies (list):

list of score-grob pointers that indicate who to compute first for certain global passes. Default value: (unset)

no-spacing-rods (boolean):

read from grobs: boolean that makes Separation_item ignore this item (MOVE ME TO ITEM). Default value: (unset)

extra-extent-X (pair of numbers):

enlarge in X dimension by this much, measured in staff space. Default value: (unset)

extra-extent-Y (pair of numbers):

see extra-extent-Y. Default value: (unset)

minimum-extent-X (pair of numbers):

minimum size in X dimension, measured in staff space. Default value: (unset)

minimum-extent-Y (pair of numbers):

see minimum-extent-Y. Default value: (unset)

origin (input location):

location in input file of the definition. Default value: (unset)

transparent (boolean):

This is almost the same as setting molecule-callback to #f, but this retains the dimensions of this grob, which means that you can erase grobs individually. . Default value: (unset)

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Copyright (c) 1997--2001 Han-Wen Nienhuys and Jan Nieuwenhuizen.

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