Re: Determine the page position of a system

[Thomas Morley]

2017-03-08 10:15 GMT+01:00 Urs Liska <address@hidden>:
> Hi all,
>
> I'd be interested in knowing the exact position of all systems in a
> score. What I'd like to achieve is write out an auxiliary file
> containing information about the musical moment and the vertical
> position of each system. I know about the moment but not about the page
> position. [1]
>
> The goal is to retrieve the current measure when clicking anywhere in a
> score in Frescobaldi. The overall goal is then to be able to sync the
> rendered score, the input, and a manuscript displayed in the Manuscript
> Viewer, which would be terrific to have.
>
> Which property/ies would I have to read out from which objects at what
> time (in which callback)?
>
> Thanks for any suggestions
> Urs
>
> [1] A fallback solution would be to use an approach like
> lilypond-book-preamble to produce the score as a sequence of individual
> files. That would of course also allow the exact linking of a click to a
> system. But I'd prefer to have that functionality independently from
> such far-reaching (and limiting) conditions.



Hi Urs,

if I understand correctly
http://lilypond.1069038.n5.nabble.com/intercepting-implicit-explicit-page-breaks-td194196.html#a194198
may give you a starting-point.

There I read barnumbers, but if you look into 'lines' you may be able
to grab the info you want.
Though its really post-processing and therefore may be too late ...

Cheers,
  Harm