handle database switches

svn: r6086

gramps2/src/GrampsDb/__init__.py

@@ -38,7 +38,7 @@ the database objects. Read the comments in _GrampsDBCallback.py for more
 information.
 """
 
-from _GrampsDbBase import DbState
+from _GrampsDbBase import DbState, GrampsDbBase
 
 from _GrampsDbFactories import \
      gramps_db_factory, \

gramps2/src/ViewManager.py

@@ -736,6 +736,13 @@ class ViewManager:
         except:
             print "could not change directory"
 
+
+        # emit the database change signal so the that models do not
+        # attempt to update the screen while we are loading the
+        # new data
+        
+        self.state.emit('database-changed',(GrampsDb.GrampsDbBase(),))
+
         try:
             if self.load_database(filename,callback,mode=mode):
                 if filename[-1] == '/':