1 # -*- encoding: utf-8 -*-
2 ##############################################################################
4 # Copyright (c) 2004-2008 Tiny SPRL (http://tiny.be) All Rights Reserved.
8 # WARNING: This program as such is intended to be used by professional
9 # programmers who take the whole responsability of assessing all potential
10 # consequences resulting from its eventual inadequacies and bugs
11 # End users who are looking for a ready-to-use solution with commercial
12 # garantees and support are strongly adviced to contract a Free Software
15 # This program is Free Software; you can redistribute it and/or
16 # modify it under the terms of the GNU General Public License
17 # as published by the Free Software Foundation; either version 2
18 # of the License, or (at your option) any later version.
20 # This program is distributed in the hope that it will be useful,
21 # but WITHOUT ANY WARRANTY; without even the implied warranty of
22 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 # GNU General Public License for more details.
25 # You should have received a copy of the GNU General Public License
26 # along with this program; if not, write to the Free Software
27 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 ###############################################################################
32 from sets
import Set
as set
35 class ObservatorRegistry(object):
37 if not hasattr(cls
, '_inst'):
38 cls
._inst
= object.__new
__(cls
)
42 self
._observables
= {}
45 def add_observable(self
, oid
, obj
):
46 self
._observables
[oid
] = obj
48 def add_receiver(self
, signal
, callable):
49 if signal
not in self
._receivers
:
50 self
._receivers
[signal
] = []
51 self
._receivers
[signal
].append(callable)
53 def remove_receiver(self
, signal
, callable):
54 self
._receivers
[signal
].remove(callable)
56 def warn(self
, *args
):
57 for receiver
in self
._receivers
.get(args
[0], []):
60 oregistry
= ObservatorRegistry()
63 class Observable(object):
65 oregistry
.add_observable(id(self
), self
)
67 def warn(self
, *args
):
68 oregistry
.warn(args
[0], self
, *args
[1:])
70 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: