Hi David, Am 08.03.2017 um 10:55 schrieb David Kastrup: > Urs Liska <u...@openlilylib.org> writes: > >> Am 08.03.2017 um 10:36 schrieb David Kastrup: >>> Urs Liska <u...@openlilylib.org> writes: >>> >>>> 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 >>> Have you tried the 'scm or the 'socket backend? >> No. Thank you for that suggestion. >> >> On >> http://lilypond.org/doc/v2.19/Documentation/usage/command_002dline-usage >> only the 'scm backend is described, and it may provide what I need. >> However, this would require me to compile the score twice and parse the >> resulting file. Probably it would be more efficient if I could create an >> engraver (?) that collects just the required data and produces the >> appropriate output file along with the score. >> >> What is the 'socket backend? > > > It probably has not seen sufficient love in the last decade or so: > apparently it does not know about "path".
>From the output this 'socket would be much more straightforward to use than 'scm, which would be a pain to parse from Python, I think. > I was surprised to find out that apparently there is no way to compile a > single score with multiple backends at the same time: it would seem like > an obvious thing to do. Indeed, because it would avoid having to *parse* the document twice. However, Harm's solution looks much more in line with what I need. Best Urs -- u...@openlilylib.org https://openlilylib.org http://lilypondblog.org
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