2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005 Erik Sandberg <mandolaerik@gmail.com>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
23 #include "listener.hh"
24 #include "stream-event.hh"
27 class Dispatcher : public Smob<Dispatcher>
30 int print_smob (SCM, scm_print_state *) const;
31 SCM mark_smob () const;
32 static const char * const type_p_name_;
33 virtual ~Dispatcher ();
35 /* Hash table. Each event-class maps to a list of listeners. */
37 /* alist of dispatchers that we listen to. Each entry is a
38 (dist . priority) pair. */
42 /* priority counter. Listeners with low priority receive events
45 void internal_add_listener (SCM callback, SCM event_class, int priority);
48 void broadcast (Stream_event *ev);
49 bool is_listened_class (SCM);
50 SCM listened_types ();
51 void add_listener (Listener, SCM event_class);
52 void add_listener (SCM callback, SCM event_class);
53 void remove_listener (Listener, SCM event_class);
54 void register_as_listener (Dispatcher *dist);
55 void unregister_as_listener (Dispatcher *dist);
59 #endif // DISPATCHER_HH