Re: Attach point-and-click link to custom stencil

[Urs Liska]

Am 13.03.2017 um 13:07 schrieb David Kastrup:
> Urs Liska <address@hidden> writes:
>
>> when writing a callback function to override a stencil, how can I attach
>> the original point-and-click link to the resulting graphics?
> Isn't it attached automatically?  I don't think the usual stencil
> callbacks bother with point-and-click info themselves.

It seems not, they are not clickable.
I'm calling the function with \override Tie.stencil = #arced-curve-stencil

which is defined as

#(define (arced-curve-stencil grob)
   ...

and returns the result of a (ly:stencil-translate (ly:make-stencil call.

>
>> Is that even possible, as I'm not actually dealing with the grob
>> anymore (isn't it)?
>>
>> I know how to get the location from inside the ties and slurs I'm
>> dealing with, but I don't know how I can get this information back
>> into the resulting element in the PDF.
> With stencils, you should not need to do anything.  When calling
> ly:engraver-make-grob yourself, be sure to specify a good cause.  Then
> the originating event's point-and-click info will be automatically
> attached.

As usual the information about ly:engraver-make-grob on the
Scheme-functions page doesn't help me very much. All I would be able to
figure out is the cause, but what kind of "engraver instance" should I
be referring to here?

-- 
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