Re: Parenthesizing rests

[Mats Bengtsson]

Playing around with \displayMusic, I got a hint on how to obtain a
parenthesized rest:
\version "2.10.0"
\relative c' { c d e
#(ly:export (make-music
 'EventChord
 'elements
 (list (make-music
         'RestEvent
         'parenthesize
         #t
         'duration
         (ly:make-duration 2 0 1 1)))))
}

A skilled Scheme hacker can easily turn this into a music function that 
applies
the music property in the correct way for a rest of any duration.
By the way, isn't it a bug that the default implementation of 
\parenthesize doesn't
handle this? If I understand correctly, this is also the reason that you 
cannot
parenthesize a single note without enclosing it in a chord.

   /Mats

Mats Bengtsson wrote:
> parenthesized is a layout object property that only is included in the
> accidental-interface, where it is used to determine if a cautionary 
> accidental
> should be typeset using smaller font or by including it in parentheses.
>
> parenthesize, on the other hand, is a music property, which is used 
> internally
> by the \parenthesize macro to add parenthesis around note heads or 
> articulations
> or ...
> For note heads, it only works within chords (I don't understand the 
> implementation
> well enough to realize why), which also explains why it doesn't work with
> rests. An ugly workaround is to use the technique in the regression test
> called stencil-hacking.ly
>
>   /Mats
>
>
> Wilbert Berendsen wrote:
> > Op woensdag 26 maart 2008, schreef Aaron Dalton:
> >  
> > > I've done some archive searching but there does not appear to be any
> > > solution.  How does one parenthesize rests?  I'm preparing a number of
> > > transcriptions that will eventually be formally published (with 
> > > Lilypond
> > > credited as the engraver) and need to be able to show editorial 
> > > rests as
> > > well as pitches.  I am having the same problems outlined in the list
> > > archives.
> > >     
> >
> > I have no solution, but grepping/looking in the sources I found both 
> > references to:
> >     to_boolean (me->get_property ("parenthesized"))
> > as well as:
> >     to_boolean (ev->get_property ("parenthesize"))
> >
> > note the "d" at the end :)
> >
> > In music-functions-init.ly the property name 'parenthesize is used.
> > Which one is correct and could that be the cause of rests not working?
> >
> > best regards,
> > Wilbert Berendsen
> >
> >   

--
=============================================
        Mats Bengtsson
        Signal Processing
        School of Electrical Engineering
        Royal Institute of Technology (KTH)
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
=============================================