Am So., 7. Okt. 2018 um 15:59 Uhr schrieb Aaron Hill <lilyp...@hillvisions.com>: > > On 2018-10-07 4:29 am, Thomas Morley wrote:
> > Below my own attempt using an engraver (to have access to the > > 'timeSignatureFraction, a context-property, and to Stem/NoteHead-grobs > > in one go). > > [ . . . ] > > That is definitely something I will have to review in detail, as I have > not yet worked with engravers and contexts obviously still have a lot to > learn. > > > -- Aaron Hill There are not many ways to access grobs and contexts at the same time. I think, engravers are the most general. We have some examples of scheme-engravers in the regression-tests. (And in the archives of the mailing-list ofcourse.) A good starting point is ‘scheme-engraver.ly’ from: http://lilypond.org/doc/v2.19/input/regression/collated-files.html It demonstrates all possible "entry-points". http://lilypond.org/doc/v2.19/Documentation/contributor-big-page#engraver-tutorial gives some documentation. It's for C++, but things are not very different for scheme. If you have too much time, you may have a look at ‘scheme-engraver.ly’ from http://lilypond.org/doc/v2.13/input/regression/collated-files.html The newer file uses the great 'make-engraver'-macro (by David Kastrup). Otoh, this macro hides an engraver _is_ a list (which is obvious, if you look in the older file). I had found it useful to observe the list-syntax for a long time, even after the make-engraver-macro was out. Helped me learning. Cheers, Harm _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
