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Re: How to catch extent of AccidentalPlacement?

From: David Nalesnik
Subject: Re: How to catch extent of AccidentalPlacement?
Date: Mon, 14 Apr 2014 08:53:24 -0500

Hi Harm,

On Sat, Apr 12, 2014 at 4:53 PM, Thomas Morley <address@hidden>wrote:

> One question remains: why was it changed?
> Instead of more or less simply calling the vallue via ly:grob-extent
> we now have to calculate it, looking at each Accidental separately.
> (via map and reduce)
> Just curious.
> I must have missed that change.

Well, it happened before 2.17.5 as near as I can tell.

I'll look at this some more, but the problem appears to be that there is no
'elements array for AccidentalPlacement.  You call ly:grob-extent on the
AP, which relies on the setting of 'X-extent, which is
ly:axis-group-interface::width.  This latter function ultimately uses the
contents of the elements array.  accidental-engraver.cc creates
AccidentalPlacement grobs, but not an elements array.

I can't figure out where that 1.1 comes from, though.


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