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Using the side-position-interface

An object which supports the side-position-interface can be placed next to its parent object so that the specified edges of the two objects touch. The object may be placed above, below, to the right or to the left of the parent. The parent cannot be specified; it is determined by the order of elements in the input stream. Most objects have the associated note head as their parent.

The values of the side-axis and direction properties determine where the object is to be placed, as follows:

side-axis property	direction property	Placement
0	-1	left
0	1	right
1	-1	below
1	1	above

When side-axis is 0, X-offset should be set to the procedure ly:side-position-interface::x-aligned-side. This procedure will return the correct value of X-offset to place the object to the left or right side of the parent according to value of direction.

When side-axis is 1, Y-offset should be set to the procedure ly:side-position-interface::y-aligned-side. This procedure will return the correct value of Y-offset to place the object to the top or bottom of the parent according to value of direction.