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Legacy listeners interface

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This commit is contained in:
Kovid Goyal 2013-04-23 16:10:15 +05:30
parent e54625a320
commit 9548ad6206
1 changed files with 18 additions and 1 deletions
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19
src/calibre/db/legacy.py
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@ -6,7 +6,7 @@ from __future__ import (unicode_literals, division, absolute_import,
__license__ = 'GPL v3' __license__ = 'GPL v3'
__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>' __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
import os import os, traceback
from functools import partial from functools import partial
from calibre.db.backend import DB from calibre.db.backend import DB
@ -30,6 +30,7 @@ class LibraryDatabase(object):
progress_callback=lambda x, y:True, restore_all_prefs=False): progress_callback=lambda x, y:True, restore_all_prefs=False):
self.is_second_db = is_second_db # TODO: Use is_second_db self.is_second_db = is_second_db # TODO: Use is_second_db
self.listeners = set([])
backend = self.backend = DB(library_path, default_prefs=default_prefs, backend = self.backend = DB(library_path, default_prefs=default_prefs,
read_only=read_only, restore_all_prefs=restore_all_prefs, read_only=read_only, restore_all_prefs=restore_all_prefs,
@ -117,6 +118,22 @@ class LibraryDatabase(object):
self.data.cache.refresh() self.data.cache.refresh()
self.data.refresh(field=field, ascending=ascending) self.data.refresh(field=field, ascending=ascending)
def add_listener(self, listener):
'''
Add a listener. Will be called on change events with two arguments.
Event name and list of affected ids.
'''
self.listeners.add(listener)
def notify(self, event, ids=[]):
'Notify all listeners'
for listener in self.listeners:
try:
listener(event, ids)
except:
traceback.print_exc()
continue
# }}} # }}}
def path(self, index, index_is_id=False): def path(self, index, index_is_id=False):