Replace StateSignal with Started & Halted

qubesdbus/domain.py

@@ -48,11 +48,30 @@ def __init__(self, bus, bus_name, bus_path, data):
                                      bus=bus, bus_name=bus_name,
                                      bus_path=bus_path)
 
-    @dbus.service.signal(
-        dbus_interface="org.qubes.DomainManager1.domains.Signals",
-        signature='s')
-    def StateSignal(self, name):
-        self.properties['state'] = name
+    @dbus.service.signal(dbus_interface="org.qubes.Domain")
+    def Started(self):
+        """ Signal emited when the domain is started """
+        pass
+
+    @dbus.service.signal(dbus_interface="org.qubes.Domain")
+    def Halted(self):
+        """ Signal emited when the domain is halted """
+        pass
+
+    @dbus.service.signal(dbus_interface='org.freedesktop.DBus.Properties',
+                         signature="sa{sv}as")
+    def PropertiesChanged(self, interface, changed_properties,
+                          invalidated=None):
+        ''' This signal is emitted when a property changes.
+        '''  # pylint: disable=unused-argument
+        # type: (str, Dict[dbus.String, Any], List[dbus.String]) -> None
+        if 'state' in changed_properties:
+            value = changed_properties['state']
+            if value == 'Running':
+                self.Started()
+            elif value == 'Halted':
+                self.Halted()
+        super().PropertiesChanged(interface, changed_properties, invalidated)
 
     @dbus.service.signal(
         dbus_interface="org.qubes.DomainManager1.domains.Signals",