Re: \fromproperty return problem.

[Nicolas Sceaux]

Le 21 févr. 08 à 14:57, Gilles THIBAULT a écrit :

> I just try the  version "2.11.40" and his new markup command :  
> \underline.
> I am very happy with it but i have a problem using it with the  
> \fromproperty
> command.
> In the score above, there is no title defined in the score header  
> but you can see a line above
> the note :
>
>   { c'1^\markup { \underline \fromproperty #'header:title } }
>
> It seems that \fromproperty doesn't return an empty stencil, even if  
> the property given in the argument is empty.
> It becomes a problem in a book with several scores,  if you defines  
> a scoreTitleMarkup for example  in a way like that
>
> \paper {
>   scoreTitleMarkup = \markup {
>       printallheaders=##t
>       ................
>      ....\underline \fromproperty #'header:subsubtitle
>       ................
>       }
>   }
> }
>
> because if a score has no subsubtitle, you'll get a (under)line !
>
> Is there a workaround for that ?

I use a \when-property markup command to handle that:

#(define-markup-command (when-property layout props symbol markp)  
(symbol? markup?)
  (if (chain-assoc-get symbol props)
      (interpret-markup layout props markp)
      (ly:make-stencil '()  '(1 . -1) '(1 . -1))))

\when-property #'header:title \underline \fromproperty #'header:title