Re: Changing the car or cdr of a pair

[Jacques Menu Muzhic]

Hello David and Malte,

Thanks for the alternatives, I now have what I needed!

JM

> Le 25 déc. 2017 à 20:21, Malte Meyn <address@hidden> a écrit :
> 
> 
> 
> Am 25.12.2017 um 19:01 schrieb David Kastrup:
>> David Kastrup <address@hidden> writes:
>>> \once \override Staff.LigatureBracket.edge-height =
>>> #(grob-transformer 'edge-height
>>>   (lambda (grob original)
>>>    (cons 0.3 (cdr original))))
>>> 
>>> For example.
>> Malte's suggestion to use \offset does something similar internally and
>> employs a nicer user interface.
> 
> If you want to add something to the original value(s), \offset is easier, 
> yes. But if you want to use absolute values, using grob-transformer instead 
> of before-line-breaking is easier so I would prefer your suggestion in that 
> case:
> 
> My suggested solution
> 
> \once \override LigatureBracket.before-line-breaking =
>  #(lambda (grob)
>     (let* ((orig-height (ly:grob-property grob 'edge-height))
>            (orig-left (car orig-height)))
>       (ly:grob-set-property! grob 'edge-height (cons orig-left 3))))
> 
> has the same effect as this variant of your simpler solution:
> 
> \once \override LigatureBracket.edge-height =
>  #(grob-transformer 'edge-height
>     (lambda (grob original)
>       (cons (car original) 3)))
> 
> 
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