Re: Accessing page number in markup for custom title

[Han-Wen Nienhuys]

Rob Vlasaty wrote:
> After looking at the titling-init.ly file, I copied and pasted a markup 
> definition and tried to modify it to check for even or odd pages.  It seems to 
> be only accessing the default value, instead of the page number.  Any ideas on 
> what I'm doing wrong?
>
> Rob
>
>
>
> \version "2.5.31"
>
> \paper {
>   linewidth = 9.0\cm
>   vsize = 10.0\cm
>
> #(define (even-page layout props arg)
>   (if (even? (chain-assoc-get 'page:page-number props -1) )
>    (interpret-markup layout props arg)
>    empty-stencil))
>         
> #(define (odd-page layout props arg)
>   (if (odd? (chain-assoc-get 'page:page-number props -1) )
>    (interpret-markup layout props arg)
>    empty-stencil))
>         
>
>         scoreTitleMarkup = \markup {
>                 \fill-line {
>                         \on-the-fly #even-page  "444"
>                         \fromproperty #'header:piece
>                         \on-the-fly #odd-page  "333"
>         }

You cannot use the page number in the title. This is due to circularity: 
 you would need the page number to determine the title, but the page 
number is determined by the page breaks, which are determined by (the 
height of) the title.


--
 Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen