Hi Nathan, On Tue, Mar 31, 2015 at 3:53 PM, Nathan Ho <when.possi...@gmail.com> wrote:
> On Mon, Mar 30, 2015 at 1:44 PM, Nathan Ho <when.possi...@gmail.com> > wrote: > >> Hi list, >> >> What is the most up-to-date way to define my own event classes? >> >> I've looked at frameEngraver as a model but none of the old versions >> seem to be working. The most up-to-date one I could find >> (https://lists.gnu.org/archive/html/lilypond-user/2013-07/msg00373.html) >> gives me numerous "Event class should be a list" errors and the frames >> don't show up in the output, while this one >> (https://lists.gnu.org/archive/html/lilypond-user/2013-07/msg00554.html) >> spits out a few errors and segfaults. I'm using 2.19.17. >> > > Not hugely surprised to see that didn't get a quick answer :) > > With some trial and error and fumbling around I came up with the following > code. Unlike the frame engraver code, this returns no errors or warnings, > but the engraver doesn't seem to notice the BangEvent at all. If I change > the listener to listen to music-event, then bang-trigger calls four times > (once per note) seemingly ignoring the \bang. What's going on here? > If you're listening to 'music-event, you'll hear all sorts of events because it's the parent of many event-classes. If you add an articulation to a note, for example, you'll hear that too. Your invocation of define-event-class makes it the parent of bang-event. > > \version "2.19.17" > > #(define-event-class 'bang-event 'music-event) > > #(define bang-types > '( > (BangEvent > . ((description . "BANG!") > (types . (bang-event music-event)) > )) > )) > You need to add 'event' to types for your event to register. (I'd have to investigate why.) Also, 'music-event' should be replaced with 'general-music'. #(define bang-types '( (BangEvent . ((description . "BANG!") (types . (general-music event bang-event)) )) )) Hope this helps! David
_______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
