Re: doc modification

[James]

On 26/06/14 00:33, David Nalesnik wrote:
> On Wed, Jun 25, 2014 at 3:02 PM, Pierre Perol-Schneider <
> address@hidden> wrote:
>
> > Hi,
> >
> > This thread :
> >
> > http://lilypond.1069038.n5.nabble.com/Positioning-spanner-at-different-height-after-line-break-td163618.html
> >
> > made me think that maybe it would be good to find another example for this
> > part :
> >
> > http://www.lilypond.org/doc/v2.18/Documentation/extending/difficult-tweaks.html
> >
> > since it's now easy to tweak with the \alterBroken command.
> Perhaps with a nested property (which \alterBroken won't handle)?
>
> It's worth noting that the example in the NR changes 'extra-offset through
> 'after-line-breaking.  The example can be adapted to work directly as an
> override of 'extra-offset (which is what \alterBroken does essentially):
>
> #(define (my-callback grob)
>
>    (let* (
>
>             ;; have we been split?
>
>             (orig (ly:grob-original grob))
>
>             ;; if yes, get the split pieces (our siblings)
>
>             (siblings (if (ly:grob? orig)
>
>                               (ly:spanner-broken-into orig)
>
>                               '())))
>
>      (if (and (>= (length siblings) 2)
>
>                   (eq? (car (last-pair siblings)) grob))
>
>          '(-2 . 5))))
>
>
> \relative c'' {
>
>    \override Tie.extra-offset = #my-callback
>
>    c1 ~ \break
>
>    c2 ~ c
>
> }
>
>
> --David
> _______________________________________________
> bug-lilypond mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/bug-lilypond
Hello,

http://code.google.com/p/lilypond/issues/detail?id=4090

I think David N and I got sidetracked about a display issue of the 
existing tweak using lilypond, lilypond-book and how the doc images are 
created.

So if David N, you can think of a better example using '.. a nested 
property' (whatever that is :) ) then I feel free to make a patch or 
update the tracker and I can make a patch.

James