Re: Setting a global default for the \paragraph macro (NR Section 7.4.4)?

[Nicolas Sceaux]

Le 18 mai 08 à 16:46, Reinhold Kainhofer a écrit :

> In the NR in Section 7.4.4
> (http://lilypond.org/doc/v2.11/Documentation/user/lilypond/New-markup-list-command-definition 
>  )
> there is a definition of the \paragraph markup list command, which  
> indents
> the first line by the value of the property 'par-indent. There is  
> also an
> example how to override that property to a different value, but  
> apparently
> the \override-lines macro works like \once\override and not like  
> \override,
> i.e. it works only for the very next call of \paragraph, but not for
> subsequent calls.
>
> This also means that I cannot globally change the indentation of the
> paragraphs (except changing the hard-coded default in the  
> definition, which
> is not what I want, because the definition is in an external style  
> sheet,
> included by multiple different scores with different formatting  
> styles).
>
> So, how can I globally change a property like par-indent or line- 
> width?

With the following definition of the \paragraph command, you can
globally change the indentation by setting a paper variable at
top-level:

#(define-markup-list-command (paragraph layout props args) (markup- 
list?)
   (let ((indent (chain-assoc-get 'par-indent props
                  (ly:output-def-lookup layout 'par-indent 2))))
     (interpret-markup-list layout props
       (make-justified-lines-markup-list (cons (make-hspace-markup  
indent)
                                               args)))))

\paper { par-indent = #3 }