still problems with accidental shift

[Han-Wen]

address@hidden writes:
> LilyPond no longer crashes, but it still doesn't work.  Turning off
> AccidentalPlacement moves all accents to a zero position, but I can't
> apply an offset again.
> 
> I assume something like the code below is the right way to do it
> (following Hanwen's instructions).

OK. Now I checked; there is a little hairy thing going on (which I
probably should document, but I haven't figured out where yet.) The
accs are put on the note heads (in Y direction), the proper code is
like this:

#(define (make-acc-position-checker pos)
  (lambda (elt)
   (and
      (not (eq? #f (memq 'accidental-interface
                    (ly-get-grob-property elt 'interfaces))))
      (eq? (ly-get-grob-property
            (ly-get-parent elt 1) 'staff-position) pos))))

> BTW, how do I activate AccidentalPlacement again for the next chords?

\property Staff.AccidentalPlacement \unset

> \context Staff \outputproperty #(make-acc-position-checker 3)
>                                #'extra-offset = #'(-4 . 0)
>       d!4
>       eis
>       gis
>       d'!

Staff position is measured from the center line; the positions should
be 2 3 5 9.

-- 

Han-Wen Nienhuys   |   address@hidden   |   http://www.cs.uu.nl/~hanwen