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Re: Determine the page position of a system


From: Urs Liska
Subject: Re: Determine the page position of a system
Date: Wed, 8 Mar 2017 12:12:30 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Icedove/45.6.0


Am 08.03.2017 um 10:56 schrieb 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.

Yes, from what an initial print-out of "lines" shows I think it's all in
there.

> Though its really post-processing and therefore may be too late ...

Not at all. What I want is the final state, a list of data points that
reflect the rendered PDF.
But I'll surely have to come back with further questions ...

Best
Urs


>
> Cheers,
>   Harm

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