129 lines
3.9 KiB
Python
129 lines
3.9 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 GrampsDbBase
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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' : (GrampsDbBase, ),
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'active-changed' : (str, ),
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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) GrampsDbBase. 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 = GrampsDbBase()
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self.open = False
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self.active = None
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self.sighndl = None
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def change_active_person(self, person):
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"""
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Change the active person and emits a signal to notify those who
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are interested.
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"""
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previous_active_person = self.active
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self.active = person
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if person:
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if previous_active_person and previous_active_person.handle == person.handle:
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pass # don't change to same!
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else:
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try:
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self.emit('active-changed', (person.handle, ))
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except:
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self.emit('active-changed', ("", ))
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def change_active_handle(self, handle):
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"""
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Change the active person based on the person's handle
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"""
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self.change_active_person(self.db.get_person_from_handle(handle))
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def get_active_person(self):
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"""
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Get the current active person. Creates a new instance to make sure that
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the data is active.
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"""
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if self.active:
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self.active = self.db.get_person_from_handle(self.active.handle)
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return self.active
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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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"""
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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(Config.IPREFIX),
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Config.get(Config.OPREFIX),
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Config.get(Config.FPREFIX),
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Config.get(Config.SPREFIX),
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Config.get(Config.PPREFIX),
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Config.get(Config.EPREFIX),
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Config.get(Config.RPREFIX),
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Config.get(Config.NPREFIX) )
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self.active = None
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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 = GrampsDbBase()
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self.db.db_is_open = False
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self.active = None
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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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