Re: nopc -- Proposed Predefines

[Carl D. Sorensen]

On 7/14/08 3:24 AM, "Nicolas Sceaux" <address@hidden> wrote:

> Le 14 juil. 08 à 04:21, Carl Sorensen a écrit :
>
>> I propose some new predefined functions:
>>
>> \pointAndClickOn
>>
>> pointAndClickOn = #(ly:set-option 'point-and-click #t)
>>
>> and
>>
>> \pointAndClickOff
>>
>> pointAndClickOff = #(ly:set-option 'point-and-click #f)
>
>
> These do not do what you think they do.
> When the first "pointAndClickOn = ..." is read by the parser, the
> scheme expression that is following is evaluated, and thus
> point-and-click is turned on. pointAndClickOn then holds the value
> returned by ly:set-option (which is #t I guess).
> So what you have done here, is to set pointAndclickOn to #t, and
> pointAndClickOff to #f, and turned on then off the point and click
> function.
>
> The music function mentionned by James in the first place did what
> you want:
>
>> noPointAndClick =
>> #(define-music-function (parser location) ()
>>   (ly:set-option 'point-and-click #f)
>>   (make-music 'SequentialMusic 'void #t))
>
> here, the option is set when \noPointAndClick is invoked, not
> when it is defined.
>

Thanks, Nicolas.  I should have recognized that, because I've just been
doing some work with void music functions.

OK, so now we have the right functions; do we want to have this added as a
predefined command?  So far I count one yes and one no on user.

Carl