Hi Abraham, > On Feb 25, 2016, at 12:28 PM, tisimst <tisimst.lilyp...@gmail.com> wrote: > > I'm asking this because I know that if I can get my hands on a grob, I know > how to access its properties (with ly:grob-property) and use that property's > value to make a change if I want (e.g., with ly:grob-set-property!). I just > don't know the equivalent process for getting my hands on a context to access > its properties. I know there's ly:context-property, but I just don't have as > much experience with it as normal grobs.
You may want a custom engraver, as they have access to contexts and context properties. As I understand it there are three main ways of intervening: 1. music functions (and scheme, void, and markup functions) 2. custom engravers 3. grob property callback procedures 1: let you do fancy things with the input, early on, before LilyPond processes it 3: let you do things with graphical output very late in the game 2: are earlier than 3, exist within contexts and thus have access to context properties (and can do things with grobs as well like with 3) As far as I know context properties can’t be accessed from a grob callback and not from music functions as David has said. So that leaves custom engravers (although I don’t really know how \applyContext fits into this). Maybe that helps? -Paul
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