Show DbState.py syntax highlighted
#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2000-2006 Donald N. Allingham
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
"""
Provides the database state class
"""
__author__ = "Donald N. Allingham"
__revision__ = "$Revision: 8032 $"
from GrampsDb import GrampsDBCallback, GrampsDbBase
import Config
class DbState(GrampsDBCallback):
"""
Provides a class to encapsulate the state of the database..
"""
__signals__ = {
'database-changed' : (GrampsDbBase, ),
'active-changed' : (str, ),
'no-database' : None,
}
def __init__(self):
"""
Initalize the state with an empty (and useless) GrampsDbBase. This is
just a place holder until a real DB is assigned.
"""
GrampsDBCallback.__init__(self)
self.db = GrampsDbBase()
self.open = False
self.active = None
self.sighndl = None
def change_active_person(self, person):
"""
Changes the active person and emits a signal to notify those who
are interested.
"""
self.active = person
if person:
try:
self.emit('active-changed', (person.handle, ))
except:
self.emit('active-changed', ("", ))
def change_active_handle(self, handle):
"""
Changes the active person based on the person's handle
"""
self.change_active_person(self.db.get_person_from_handle(handle))
def get_active_person(self):
"""
Gets the current active person. Creates a new instance to make sure that
the data is active.
"""
if self.active:
self.active = self.db.get_person_from_handle(self.active.handle)
return self.active
def change_database(self, database):
"""
Closes the existing db, and opens a new one.
"""
self.db.close()
self.change_database_noclose(database)
def change_database_noclose(self, database):
"""
Changes the current database. and resets the configuration prefixes.
"""
self.db = database
self.db.set_prefixes(
Config.get(Config.IPREFIX),
Config.get(Config.OPREFIX),
Config.get(Config.FPREFIX),
Config.get(Config.SPREFIX),
Config.get(Config.PPREFIX),
Config.get(Config.EPREFIX),
Config.get(Config.RPREFIX),
Config.get(Config.NPREFIX) )
self.active = None
self.open = True
def signal_change(self):
"""
Emits the database-changed signal with the new database
"""
self.emit('database-changed', (self.db, ))
def no_database(self):
"""
Closes the database without a new database
"""
self.db.close()
self.db = GrampsDbBase()
self.db.db_is_open = False
self.active = None
self.open = False
self.emit('database-changed', (self.db, ))
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