wifi: Keep Airplane Mode always synchronized

Currently, we acquire the Rfkill D-Bus proxy and synchronize
the state right after that. However, we don't monitor for
subsequent changes by connecting to the 'g-properties-changed'
GDBusProxy signal, which causes the Airplane Mode not to stay
synchronized when modified from others places, such as GNOME
Shell's aggregate menu.

This commit adds the necessary signal monitoring code to react
to external applications changing the Rfkill properties.

1 files changed, 17 insertions, 0 deletions

diff --git a/panels/network/cc-wifi-panel.c b/panels/network/cc-wifi-panel.c
index 2448f87a2..09e16baf8 100644
--- a/panels/network/cc-wifi-panel.c
+++ b/panels/network/cc-wifi-panel.c
@@ -480,6 +480,17 @@ wireless_enabled_cb (NMClient    *client,
 }
 
 static void
+on_rfkill_proxy_properties_changed_cb (GDBusProxy  *proxy,
+                                       GVariant    *changed_properties,
+                                       GStrv        invalidated_properties,
+                                       CcWifiPanel *self)
+{
+  g_debug ("Rfkill properties changed");
+
+  sync_airplane_mode_switch (self);
+}
+
+static void
 rfkill_proxy_acquired_cb (GObject      *source_object,
                           GAsyncResult *res,
                           gpointer      user_data)
@@ -504,6 +515,12 @@ rfkill_proxy_acquired_cb (GObject      *source_object,
 
   self->rfkill_proxy = proxy;
 
+  g_signal_connect_object (proxy,
+                           "g-properties-changed",
+                           G_CALLBACK (on_rfkill_proxy_properties_changed_cb),
+                           self,
+                           0);
+
   sync_airplane_mode_switch (self);
 }