1 // Listener for canvas (GUI) events being passed to a Nasal function/code
3 // Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Library General Public
7 // License as published by the Free Software Foundation; either
8 // version 2 of the License, or (at your option) any later version.
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Library General Public License for more details.
15 // You should have received a copy of the GNU Library General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 #include "CanvasEventListener.hxx"
20 #include "CanvasSystemAdapter.hxx"
22 #include <simgear/nasal/nasal.h>
29 //----------------------------------------------------------------------------
30 EventListener::EventListener(naRef code, const SystemAdapterPtr& sys_adapter):
35 assert( sys_adapter );
39 throw std::runtime_error
41 "canvas::EventListener: invalid function argument"
44 _gc_key = sys_adapter->gcSave(_code);
47 //----------------------------------------------------------------------------
48 EventListener::~EventListener()
50 assert( !_sys.expired() );
51 _sys.lock()->gcRelease(_gc_key);
54 //------------------------------------------------------------------------------
55 void EventListener::call()
57 const size_t num_args = 1;
58 naRef args[num_args] = {
61 _sys.lock()->callMethod(_code, naNil(), num_args, args, naNil());
66 } // namespace simgear