GTK3: errors in callbacks when changing family trees.

This was very hard to debug, the signalling at the moment seems inconsistent. 
Committing this patch now to avoid problems testing further


svn: r20296

src/cli/grampscli.py

@@ -145,15 +145,14 @@ class CLIDbLoader(object):
             mode = 'w'
 
         dbclass = DbBsddb
-        
-        self.dbstate.change_database(dbclass())
-        self.dbstate.db.disable_signals()
+        dbclass.disable_signals()
 
         self._begin_progress()
         
         try:
-            self.dbstate.db.load(filename, self._pulse_progress, mode)
-            self.dbstate.db.set_save_path(filename)
+            dbclass.load(filename, self._pulse_progress, mode)
+            dbclass.set_save_path(filename)
+            self.dbstate.change_database(dbclass())
         except gen.db.exceptions.DbUpgradeRequiredError, msg:
             self.dbstate.no_database()
             self._errordialog( _("Cannot open database"), str(msg))

src/gen/dbstate.py

@@ -55,6 +55,7 @@ class DbState(Callback):
         Closes the existing db, and opens a new one.
         Retained for backward compatibility.
         """
+        self.emit('no-database', ())
         self.db.close()
         self.change_database_noclose(database)
 
@@ -74,6 +75,7 @@ class DbState(Callback):
             config.get('preferences.rprefix'),
             config.get('preferences.nprefix') )
         self.open = True
+        self.signal_change()
 
     def signal_change(self):
         """
@@ -85,6 +87,7 @@ class DbState(Callback):
         """
         Closes the database without a new database
         """
+        self.emit('no-database', ())
         self.db.close()
         self.db = DbBsddbRead()
         self.db.db_is_open = False

src/gui/dbloader.py

@@ -291,23 +291,28 @@ class DbLoader(CLIDbLoader):
         else:
             mode = 'w'
 
-        self.dbstate.change_database(gen.db.DbBsddb())
-        self.dbstate.db.disable_signals()
+        db = gen.db.DbBsddb()
+        db.disable_signals()
+        self.dbstate.no_database()
 
         self._begin_progress()
         
         try:
             try:
-                self.dbstate.db.load(filename, self._pulse_progress, 
+                db.load(filename, self._pulse_progress, 
                                      mode, upgrade=False)
+                self.dbstate.change_database(db)
             except gen.db.exceptions.DbUpgradeRequiredError, msg:
                 if QuestionDialog2(_("Need to upgrade database!"), 
                                    str(msg), 
                                    _("Upgrade now"), 
                                    _("Cancel")).run():
-                    self.dbstate.db.load(filename, self._pulse_progress, 
+                    db = gen.db.DbBsddb()
+                    db.disable_signals()
+                    db.load(filename, self._pulse_progress, 
                                          mode, upgrade=True)
-                    self.dbstate.db.set_save_path(filename)
+                    db.set_save_path(filename)
+                    self.dbstate.change_database(db)
                 else:
                     self.dbstate.no_database()
         except gen.db.exceptions.BsddbDowngradeError, msg:

src/gui/views/listview.py

@@ -122,6 +122,11 @@ class ListView(NavigationView):
         dbstate.connect('database-changed', self.change_db)
         self.connect_signals()
 
+    def no_database(self):
+        self.list.set_model(None)
+        self.model = None
+        self.build_tree()
+        
     def type_list(self):
         """
         set the listtype, this governs eg keybinding

src/plugins/lib/libpersonview.py

@@ -128,7 +128,8 @@ class BasePersonView(ListView):
             'person-delete'  : self.row_delete,
             'person-rebuild' : self.object_build,
             'person-groupname-rebuild' : self.object_build,
-            'tag-update' : self.tag_updated
+            'tag-update' : self.tag_updated,
+            'no-database': self.no_database,
             }
  
         ListView.__init__(