1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
# Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 of the
# License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
# 02110-1301 USA
import grt
class NotificationCenter(object):
__instance = None
observers = []
def __new__(cls, *args, **kwargs):
if cls.__instance is None:
cls.__instance = super(NotificationCenter, cls).__new__(cls, *args, **kwargs)
return cls.__instance
def _the_observer(self, name, sender, args):
for obs, nam, obj in self.observers:
if (nam is None or name == nam) and (obj is None or obj == sender):
try:
obs(name, sender, args)
except:
grt.log_error("PyNotificationCenter", "Error calling notification observer for %s\n" % name)
import traceback
traceback.print_exc()
def add_observer(self, observer, name = None, object = None):
self.observers.append((observer, name, object))
def remove_observer(self, observer, name = None):
for i, (obs, n, obj) in enumerate(self.observers):
if observer == obs and (name is None or name == n):
del self.observers[i]
break
def send(self, name, sender, info):
grt.send_grt_notification(name, sender, info)
nc = NotificationCenter()
grt._set_grt_notification_observer(nc._the_observer)
|
