Re: change note heads according to their current measure position?

[Marc Hohl]

Hi David,

thanks for your info – and your work in this area!

Am 24.02.2015 um 15:29 schrieb David Nalesnik:
> Hi Marc,
>
> On Sat, Feb 14, 2015 at 11:15 AM, David Nalesnik
> <address@hidden <mailto:address@hidden>> wrote:
>
>     Hi Marc,
>
>     On Sat, Feb 14, 2015 at 10:39 AM, Marc Hohl <address@hidden
>     <mailto:address@hidden>> wrote:
>
>
>         IIRC, there is no way to obtain the current measure position
>         from the NoteHead grob itself ...
>
>
>     You can find the location by finding the PaperColumn grob which is
>     associated with the NoteHead.  The properties 'rhythmic-location or
>     'when contain timing imformation.  Here's a sketch:
>
>     \version "2.19.15"
>
>     #(define (get-paper-column grob)
>         (if (not (ly:grob? grob))
>             (ly:message "column not found")
>             (if (grob::has-interface grob 'paper-column-interface)
>                 grob
>                 (get-paper-column (ly:grob-parent grob X)))))
>
>
> In current master, there is now a function ly:item-get-column which
> returns the associated column.. (This will need to wait for the release
> of 2.19.16.)

Yep, I replaced get-paper-column with ly:item-get-column in my code and 
it works like a charm!

>     #(define (return-location grob)
>         (let ((col (get-paper-column grob)))
>           (display (ly:grob-property col 'rhythmic-location))
>           (newline)))
>
>
> There are currently two functions being reviewed which will return
> location data.  The above would be covered by grob::rhythmic-location
> (and there would be no need of looking for a paper column separately).
> https://code.google.com/p/lilypond/issues/detail?id=4294

That's great news, I highly appreciate these new functions!

Thanks a lot,

Marc
> --David