cola/notification.py

   1 import os
   2 from PyQt4 import QtCore
   3 from cola import signals
   4
   5 debug = os.environ.get('COLA_NOTIFIER_DEBUG', False)
   6 _instance = None
   7 def notifier():
   8     global _instance
   9     if _instance:
  10         return _instance
  11     _instance = QNotifier()
  12     return _instance
  13
  14
  15 class QNotifier(QtCore.QObject):
  16     def broadcast(self, signal, *args, **kwargs):
  17         if debug:
  18             print ('broadcast: %s(%s, %s)' % (signals.name(signal),
  19                                               args or '<empty>',
  20                                               kwargs or '<empty>'))
  21         self.emit(signal, *args, **kwargs)
  22
  23     def listen(self, signal, callback):
  24         self.connect(self, signal, callback)