network_dialog: do not use parent for signalling

gui/qt/__init__.py

@@ -139,7 +139,7 @@ class ElectrumGui:
         # Use a signal as can be called from daemon thread
         self.app.emit(SIGNAL('new_window'), path, uri)
 
-    def show_network_dialog(self, parent):
+    def show_network_dialog(self):
         from network_dialog import NetworkDialog
         if not self.daemon.network:
             parent.show_warning(_('You are using Electrum in offline mode; restart Electrum if you want to get connected'), title=_('Offline'))
@@ -148,7 +148,7 @@ class ElectrumGui:
             self.nd.show()
             self.nd.raise_()
             return
-        self.nd = NetworkDialog(self.daemon.network, self.config, parent)
+        self.nd = NetworkDialog(self.daemon.network, self.config)
         self.nd.show()
 
     def create_window_for_wallet(self, wallet):

gui/qt/main_window.py

@@ -478,7 +478,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
 
         # Settings / Preferences are all reserved keywords in OSX using this as work around
         tools_menu.addAction(_("Electrum preferences") if sys.platform == 'darwin' else _("Preferences"), self.settings_dialog)
-        tools_menu.addAction(_("&Network"), lambda: self.gui_object.show_network_dialog(self))
+        tools_menu.addAction(_("&Network"), self.gui_object.show_network_dialog)
         tools_menu.addAction(_("&Plugins"), self.plugins_dialog)
         tools_menu.addSeparator()
         tools_menu.addAction(_("&Sign/verify message"), self.sign_verify_message)
@@ -1728,7 +1728,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
         sb.addPermanentWidget(StatusBarButton(QIcon(":icons/preferences.png"), _("Preferences"), self.settings_dialog ) )
         self.seed_button = StatusBarButton(QIcon(":icons/seed.png"), _("Seed"), self.show_seed_dialog )
         sb.addPermanentWidget(self.seed_button)
-        self.status_button = StatusBarButton(QIcon(":icons/status_disconnected.png"), _("Network"), lambda: self.gui_object.show_network_dialog(self))
+        self.status_button = StatusBarButton(QIcon(":icons/status_disconnected.png"), _("Network"), self.gui_object.show_network_dialog)
         sb.addPermanentWidget(self.status_button)
         run_hook('create_status_bar', sb)
         self.setStatusBar(sb)

gui/qt/network_dialog.py

@@ -38,21 +38,20 @@ protocol_names = ['TCP', 'SSL']
 protocol_letters = 'ts'
 
 class NetworkDialog(QDialog):
-    def __init__(self, network, config, parent):
-        QDialog.__init__(self, parent)
+    def __init__(self, network, config):
+        QDialog.__init__(self)
         self.setWindowTitle(_('Network'))
         self.setMinimumSize(400, 20)
         self.nlayout = NetworkChoiceLayout(network, config)
         vbox = QVBoxLayout(self)
         vbox.addLayout(self.nlayout.layout())
         vbox.addLayout(Buttons(CloseButton(self)))
-        self.connect(parent, QtCore.SIGNAL('updated'), self.on_update)
 
-    def do_exec(self):
-        result = self.exec_()
-        #if result:
-        #    self.nlayout.accept()
-        return result
+        self.connect(self, QtCore.SIGNAL('updated'), self.on_update)
+        network.register_callback(self.on_network, ['updated'])
+
+    def on_network(self, event, *args):
+        self.emit(QtCore.SIGNAL('updated'), event, *args)
 
     def on_update(self):
         self.nlayout.update()