93 lines
2.8 KiB
Python
93 lines
2.8 KiB
Python
#
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# Gramps - a GTK+/GNOME based genealogy program
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#
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# Copyright (C) 2000-2006 Donald N. Allingham
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Provide the database state class
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"""
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from gen.db import DbBsddbRead
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from gen.utils import Callback
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import config
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class DbState(Callback):
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"""
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Provide a class to encapsulate the state of the database.
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"""
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__signals__ = {
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'database-changed' : (DbBsddbRead, ),
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'no-database' : None,
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}
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def __init__(self):
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"""
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Initalize the state with an empty (and useless) DbBsddbRead. This is
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just a place holder until a real DB is assigned.
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"""
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Callback.__init__(self)
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self.db = DbBsddbRead()
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self.open = False
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def change_database(self, database):
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"""
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Closes the existing db, and opens a new one.
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Retained for backward compatibility.
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"""
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self.db.close()
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self.change_database_noclose(database)
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def change_database_noclose(self, database):
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"""
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Change the current database. and resets the configuration prefixes.
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"""
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self.db = database
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self.db.set_prefixes(
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config.get('preferences.iprefix'),
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config.get('preferences.oprefix'),
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config.get('preferences.fprefix'),
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config.get('preferences.sprefix'),
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config.get('preferences.pprefix'),
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config.get('preferences.eprefix'),
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config.get('preferences.rprefix'),
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config.get('preferences.nprefix') )
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self.open = True
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def signal_change(self):
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"""
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Emits the database-changed signal with the new database
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"""
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self.emit('database-changed', (self.db, ))
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def no_database(self):
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"""
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Closes the database without a new database
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"""
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self.db.close()
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self.db = DbBsddbRead()
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self.db.db_is_open = False
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self.open = False
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self.emit('database-changed', (self.db, ))
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def get_database(self):
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"""
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Get a reference to the current database.
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"""
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return self.db
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