Re: \center-column sometimes appears not to reserve space.

[Reinhold Kainhofer]

Am Mittwoch, 15. Dezember 2010, um 15:43:42 schrieb David Kastrup:
> Take a look at the following:
> 
> \markup { \concat { \center-column { Ooooooh ah }
>         \center-column { Ah oooooooh }
>         \center-column { Ooooooh ah }
>         } }
> 
> It would appear that the middle column has no horizontal size at all.
> I think that's a regression in comparison to the last stable version.

No. The issue is rather that center-column has an alignment point at the 
center, so the center of the column is placed where the left edge should be. 
As a result, for each center-column, the left half collides with the previous 
markups.
A long while ago, I created a patch, but that caused severe problems with fret 
diagrams. Furthermore, I reimplemented the code where I ran into those 
problems, so I no longer had a problem with the mis-alignment. The patch was 
subsequently lost completely.

As a workaround, you can wrap \left-align around each center-column... (See 
also my mail to -user last saturday about the time signature formatting - 
Thread "double time signatures").

Cheers,
Reinhold

-- 
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Reinhold Kainhofer, address@hidden, http://reinhold.kainhofer.com/
 * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
 * http://www.fam.tuwien.ac.at/, DVR: 0005886
 * LilyPond, Music typesetting, http://www.lilypond.org