lily/balloon-engraver.cc

   1 /*
   2   balloon-engraver.cc -- implement Balloon_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2006--2007 Han-Wen Nienhuys <hanwen@lilypond.org>
   7
   8 */
   9
  10 #include "engraver.hh"
  11
  12 #include "stream-event.hh"
  13 #include "item.hh"
  14
  15 #include "translator.icc"
  16
  17 class Balloon_engraver : public Engraver
  18 {
  19   TRANSLATOR_DECLARATIONS (Balloon_engraver);
  20
  21   DECLARE_TRANSLATOR_LISTENER (annotate_output);
  22   DECLARE_ACKNOWLEDGER (grob);
  23   vector<Stream_event *> events_;
  24
  25   void stop_translation_timestep ();
  26
  27   void balloonify (Grob *, Stream_event *);
  28 };
  29
  30 IMPLEMENT_TRANSLATOR_LISTENER (Balloon_engraver, annotate_output);
  31 void
  32 Balloon_engraver::listen_annotate_output (Stream_event *ev)
  33 {
  34   events_.push_back (ev);
  35 }
  36
  37 void
  38 Balloon_engraver::stop_translation_timestep ()
  39 {
  40   events_.clear ();
  41 }
  42
  43 Balloon_engraver::Balloon_engraver ()
  44 {
  45 }
  46
  47 void
  48 Balloon_engraver::balloonify (Grob *g, Stream_event *event)
  49 {
  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);
  54 }
  55
  56 void
  57 Balloon_engraver::acknowledge_grob (Grob_info info)
  58 {
  59   Stream_event *cause = info.event_cause ();
  60
  61   SCM arts = cause ? cause->get_property ("articulations") : SCM_EOL;
  62   for (SCM s = arts; scm_is_pair (s); s = scm_cdr (s))
  63     {
  64       Stream_event *e = unsmob_stream_event (scm_car (s));
  65       if (e->in_event_class ("annotate-output-event"))
  66         {
  67           balloonify (info.grob (), e);
  68         }
  69     }
  70
  71   for (vsize i = 0; i < events_.size (); i++)
  72     {
  73       if (info.grob ()->name () == ly_symbol2string (events_[i]->get_property ("symbol")))
  74         balloonify (info.grob (), events_[i]);
  75     }
  76 }
  77
  78
  79
  80 ADD_ACKNOWLEDGER (Balloon_engraver, grob);
  81
  82 ADD_TRANSLATOR (Balloon_engraver,
  83                /* doc */
  84                "Create balloon texts.",
  85
  86                /* create */
  87                "BalloonTextItem ",
  88
  89                /*read*/
  90                "",
  91
  92                /*write*/
  93                ""
  94                );