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Re: Bug in \offset with Fingering.font-size?

From: Trevor Daniels
Subject: Re: Bug in \offset with Fingering.font-size?
Date: Sun, 2 Nov 2014 00:10:32 -0000

David Nalesnik wrote Saturday, November 01, 2014 11:53 PM

> On Sat, Nov 1, 2014 at 6:21 PM, Trevor Daniels <address@hidden> wrote:
>> David Nalesnik wrote Saturday, November 01, 2014 10:53 PM
>>>To work, \offset needs access to a default value--a number,
>>> number-pair, or list of number-pairs--or a default procedure to calculate
>>> these values with.  If you don't find an entry in define-grobs.scm, it will
>>> have nothing to work with.
>>> DynamicLineSpanner.padding works because it's set by default to 0.6.
>> Hm.  I wonder if it would go badly wrong if it simply assumed 0 in
>> such cases? Or #'(0 . 0) - whatever it was expecting.  You'd have to assume
>>the form given in the passed offset value was correct, I suppose.  In
>> other words, work as if it were \override or \tweak.
> Wouldn't it just be duplicating the effect of an ordinary override of the 
> property?

Well, yes.  But the point of \offset is that the user doesn't know and doesn't
need to know what the default value is or whether it has a default value or
not.  He or she just wants to shift it a little from where it currently is.

> Would this be a better behavior than what happens currently--maybe 
> give a warning "no default found, using 0.0" and at least do something nice?

I don't think a warning would be necessary (assuming you find it works
well).  It would do exactly what the user was expecting.

> Actually, it might not be hard to enhance \offset to deal with Script.  
> The defaults aren't stored in define-grobs, rather they're in script.scm. 
> I'll look into that.

Great!  I've just found two good examples serendipitously with layout
queries from Noeck.  So I'll work with them.  Tomorrow.  It's late.


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