Re: Determining what parameters exist for an item

[Kieren MacMillan]

Hi again,

Here’s a perfect example of what I’m talking about…

For KeyCancellation, the output of Harm’s function includes

 GROB-INTERFACE
        X-extent:
        (0.0 . 5.866662)

But if I look on 
http://www.lilypond.org/doc/v2.19/Documentation/internals/keycancellation, 
there is no entry for the X-extent setting. And if I follow the interface link 
to grob-interface, all it says is

    X-extent (pair of numbers)
    Extent (size) in the X direction, measured in staff-space units, relative 
to object’s reference point.

with [obviously] no specific setting for KeyCancellation.

Now, if I want to reduce or enlarge KeyCancellation.X-extent, knowing that 
default is (0.0 . 5.866662)*** gives me critical information that I can 
actually use as a reference point; without that information, the 
trial-and-error factor increases dramatically.

Thanks again, Harm. This is *extremely* helpful, and exactly solves this 
problem which I’ve asked about on the list several times over the past few 
years.

Best regards,
Kieren.

*** I’m not sure if that strange-looking value 5.866662 is the result of some 
calculation that is getting evaluated/resolved in order to be visible in the 
output… but that’s of secondary concern to me as a user/tweaker.

________________________________

Kieren MacMillan, composer
‣ website: www.kierenmacmillan.info
‣ email: address@hidden