Re: add-grace-properties in TabVoice context

[Marc Hohl]

Neil Puttock schrieb:
> 2009/7/3 Marc Hohl <address@hidden>:
>
>   
> > Programmierfehler: cannot find context:
> > Fortsetzung, die Daumen drücken
> > TabVoiceProgrammierfehler: cannot find context:
> > Fortsetzung, die Daumen drücken
> > TabVoiceVorverarbeitung der grafischen Elemente...
> > Solving 1 page-breaking chunks...[1: 1 pages]
> >     
>
> Hmm, some rather poor formatting for this programming error: the
> context string is further down the log since it's not part of the
> error string.
>
>   
Ah, I see.
> > 1) Apparently I made some mistakes, but I don't understand the error
> > messages.
> >     
>
> The error comes from the Voice context in your snippet, since it can't
> find a TabVoice to apply the setting to. Try this instead:
>
> #(add-grace-property 'Voice 'TabNoteHead 'font-size -4)
>
> Because TabVoice is an alias of Voice, the 'font-size setting will be
> applied correctly, but ignored in any Voice contexts.
>   
This explains why it worked correctly when I copied the example
from the lsr - thanks for the clarification.
>   
> > 2) Can I automatize the function call so that the user doesn't have to call
> >  add-grace-property in every new TabVoice?
> >  I tried to put this in a layout block, but
> >  \layout {
> >     \context {
> >        \TabStaff
> >        #(add-grace-property 'TabVoice 'TabNoteHead 'font-size -4)
> >     }
> >  }
> >  gives an error message.
> >     
>
> You can't put functions inside a context definition.
>
> I'd suggest making this part of the default grace settings by adding
> the override directly to graceSettings and make-voice-props-set.
>   
Ok, I think this should be included in a patch when the tablature features
are ready to be published.

Thanks again for your explanations!

Marc
> Regards,
> Neil
>
>