Janek Warchoł <[email protected]> writes:
> Hi,
>
> 2014-07-28 16:13 GMT+02:00 David Nalesnik <[email protected]>:
>> In the following example, the ordinary overrides of self-alignment-X appear
>> to have no effect on the position pf the dynamics (or an effect I can't
>> see). Large numbers are needed for an obvious shift.
>>
>> Is this a bug, or something I'm doing wrong?
>
> You're misusing self-alignment-X. This feature is *not* for shifting
> stuff - it is meant for aligning particular point of an object on a
> particular point of its parent. For example, self-alignment-X = #LEFT
> means "place this object so that its left edge (i.e. left end of
> X-extent) is horizontally aligned with its parent's left edge".
The documentation states:
3.2.98 self-alignment-interface
-------------------------------
Position this object on itself and/or on its parent. To this end, the
following functions are provided:
‘Self_alignment_interface::[xy]_aligned_on_self’
Align self on reference point, using ‘self-alignment-X’ and
‘self-alignment-Y’.
‘Self_alignment_interface::aligned_on_[xy]_parent’
‘Self_alignment_interface::centered_on_[xy]_parent’
Shift the object so its own reference point is centered on the
extent of the parent
User settable properties:
.........................
‘self-alignment-X’ (number)
Specify alignment of an object. The value ‘-1’ means left
aligned, ‘0’ centered, and ‘1’ right-aligned in X direction.
Other numerical values may also be specified.
‘self-alignment-Y’ (number)
Like ‘self-alignment-X’ but for the Y axis.
Now a number of grobs have their definition of X-offset changed in a
manner where they will behave quite differently to previously, and
particularly differently with regard to self-alignment-X which
previously was used in several cases to only affect the self-alignment
with regard to a parent reference point.
Compare
<URL:http://lilypond.org/doc/v2.18/Documentation/notation/aligning-objects#-Self_002daligning-objects-in-both-directions>
with
<URL:http://lilypond.org/doc/v2.19/Documentation/notation/aligning-objects#-Self_002daligning-objects-in-both-directions>
It's not just that the example looks different, the code comments no
longer fit either.
This is a mechanism that has been _advertised_ for tweaking the
positioning. It _still_ is advertised in that manner.
--
David Kastrup
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