2 balloon-engraver.cc -- implement Balloon_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2006--2007 Han-Wen Nienhuys <hanwen@lilypond.org>
10 #include "engraver.hh"
12 #include "stream-event.hh"
15 #include "translator.icc"
17 class Balloon_engraver : public Engraver
19 TRANSLATOR_DECLARATIONS (Balloon_engraver);
21 DECLARE_TRANSLATOR_LISTENER (annotate_output);
22 DECLARE_ACKNOWLEDGER (grob);
23 vector<Stream_event *> events_;
25 void stop_translation_timestep ();
27 void balloonify (Grob *, Stream_event *);
30 IMPLEMENT_TRANSLATOR_LISTENER (Balloon_engraver, annotate_output);
32 Balloon_engraver::listen_annotate_output (Stream_event *ev)
34 events_.push_back (ev);
38 Balloon_engraver::stop_translation_timestep ()
43 Balloon_engraver::Balloon_engraver ()
48 Balloon_engraver::balloonify (Grob *g, Stream_event *event)
50 Grob * b = make_item ("BalloonTextItem", event->self_scm ());
51 b->set_property ("text", event->get_property ("text"));
52 b->set_parent (g, Y_AXIS);
53 b->set_parent (g, X_AXIS);
57 Balloon_engraver::acknowledge_grob (Grob_info info)
59 Stream_event *cause = info.event_cause ();
61 SCM arts = cause ? cause->get_property ("articulations") : SCM_EOL;
62 for (SCM s = arts; scm_is_pair (s); s = scm_cdr (s))
64 Stream_event *e = unsmob_stream_event (scm_car (s));
65 if (e->in_event_class ("annotate-output-event"))
67 balloonify (info.grob (), e);
71 for (vsize i = 0; i < events_.size (); i++)
73 if (info.grob ()->name () == ly_symbol2string (events_[i]->get_property ("symbol")))
74 balloonify (info.grob (), events_[i]);
80 ADD_ACKNOWLEDGER (Balloon_engraver, grob);
82 ADD_TRANSLATOR (Balloon_engraver,
83 "Create balloon texts",