* src/GrampsDb/_GrampsDbBase.py: convert DbState to its own file

* src/GrampsDb/__init__.py: convert DbState to its own file
	* src/DbState.py: convert DbState to its own file
	* src/gramps_main.py: convert DbState to its own file
	* src/Makefile.am: convert DbState to its own file


svn: r8041

src/DbState.py

@@ -0,0 +1,88 @@
+#
+# 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):
+
+    __signals__ = {
+        'database-changed' : (GrampsDbBase, ), 
+        'active-changed'   : (str, ), 
+        'no-database'      :  None, 
+        }
+
+    def __init__(self):
+        GrampsDBCallback.__init__(self)
+        self.db     = GrampsDbBase()
+        self.open   = False
+        self.active = None
+
+    def change_active_person(self, person):
+        self.active = person
+        if person:
+            try:
+                self.emit('active-changed', (person.handle, ))
+            except:
+                self.emit('active-changed', ("", ))
+
+    def change_active_handle(self, handle):
+        self.change_active_person(self.db.get_person_from_handle(handle))
+
+    def get_active_person(self):
+        if self.active: # Fetch a fresh version from DB to not return a stale one
+            self.active = self.db.get_person_from_handle(self.active.handle)
+        return self.active
+
+    def change_database(self, database):
+        self.db.close()
+        self.change_database_noclose(database)
+
+    def change_database_noclose(self, database):
+        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))
+
+        self.active = None
+        self.open = True
+
+    def signal_change(self):
+        self.emit('database-changed', (self.db, ))
+
+    def no_database(self):
+        self.db.close()
+        self.db = GrampsDbBase()
+        self.active = None
+        self.open = False
+        self.emit('no-database')