Hi all, is it possible from either a music function or a callback or an engraver to get to all the grobs in a certain note column, either across the whole score or within specific contexts? And/or the skylines in these.
I want to learn how to write a music function that takes some music and does something taking all relevant grobs into account, e.g. drawing a bounding rectangle around everything. I *assume* I would have to somehow "mark up" everything enclosed in the music expression (i.e. attach some arbitrary property values to the elements) and later process these properties in a callback. I think an engraver would be the appropriate tool for that, but I don't really recall how I'd have to approach this. If an example is easier than an explanation or a pointer I'd be happy about an example that includes - a music expression taking arbitrary music and an optional list of context names - something that produces a list of all grobs that are included in/produced by that music expression and optionally at the same time in all/given other contexts - is able to act upon the total of these grobs, e.g. drawing a rectangle around the extreme extents (although I can figure out that last one if I have the list of grobs and a suitable callback where I can use it) Thank you for any suggestions! Urs _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
