PopoverWidget: add stateful icons to Airplane Mode (#338)

Author: danirabbit

data/16/airplane-mode-disabled-symbolic.svg

@@ -3,6 +3,9 @@
   <gresource prefix="/io/elementary/wingpanel/network">
     <file compressed= "true">Indicator.css</file>
 
+    <file alias="scalable/status/airplane-mode-symbolic.svg" compressed="true" preprocess="xml-stripblanks">16/airplane-mode-symbolic.svg</file>
+    <file alias="scalable/status/airplane-mode-disabled-symbolic.svg" compressed="true" preprocess="xml-stripblanks">16/airplane-mode-disabled-symbolic.svg</file>
+
     <file alias="16x16/status/panel-network-cellular-acquiring-symbolic.svg" compressed="true" preprocess="xml-stripblanks">16/network-cellular-acquiring-symbolic.svg</file>
     <file alias="16x16/status/panel-network-cellular-connected-symbolic.svg" compressed="true" preprocess="xml-stripblanks">16/network-cellular-connected-symbolic.svg</file>
     <file alias="16x16/status/panel-network-cellular-disconnected-symbolic.svg" compressed="true" preprocess="xml-stripblanks">16/network-cellular-disconnected-symbolic.svg</file>

data/16/airplane-mode-symbolic.svg

@@ -80,11 +80,9 @@ public class Network.Indicator : Wingpanel.Indicator {
             );
         });
 
-        var action_group = new SimpleActionGroup ();
+        var action_group = (SimpleActionGroup) popover_widget.get_action_group ("network");
         action_group.add_action (airplane_action);
 
-        popover_widget.insert_action_group ("network", action_group);
-
         update_tooltip ();
         on_state_changed ();
         start_monitor ();

data/network.gresource.xml

@@ -58,11 +58,25 @@ public class Network.Widgets.PopoverWidget : Gtk.Box {
         if (is_in_session) {
             var airplane_toggle = new SettingsToggle () {
                 action_name = "network.airplane-mode",
-                icon_name = "airplane-mode-symbolic",
+                icon_name = "airplane-mode-disabled-symbolic",
                 settings_uri = "settings://network",
                 text = _("Airplane Mode")
             };
 
+            var action_group = new SimpleActionGroup ();
+            action_group.action_state_changed.connect ((action_name, state) => {
+                critical ("got a state change");
+                if (action_name == "airplane-mode") {
+                    if (state.get_boolean ()) {
+                        airplane_toggle.icon_name = "airplane-mode-symbolic";
+                    } else {
+                        airplane_toggle.icon_name = "airplane-mode-disabled-symbolic";
+                    }
+                }
+            });
+
+            insert_action_group ("network", action_group);
+
             var airplane_child = new Gtk.FlowBoxChild () {
                 // Prevent weird double focus border
                 can_focus = false,