From 4643e1008371882190c7dcc3dfcec12d6008152b Mon Sep 17 00:00:00 2001
From: Robert Ancell <robert.ancell@canonical.com>
Date: Fri, 8 Feb 2013 11:38:17 +1300
Subject: Only show indicator if Bluetooth adapter present

---
 src/indicator-bluetooth-service.vala | 29 +++++++++++++++++++++++++++++
 src/indicator-bluetooth.vala         |  5 +++++
 2 files changed, 34 insertions(+)

(limited to 'src')

diff --git a/src/indicator-bluetooth-service.vala b/src/indicator-bluetooth-service.vala
index 0348876..21ac4e5 100644
--- a/src/indicator-bluetooth-service.vala
+++ b/src/indicator-bluetooth-service.vala
@@ -116,6 +116,10 @@ public class BluetoothIndicator
         menu.child_append (item);
 
         killswitch_state_changed_cb (killswitch.state);
+
+        client.adapter_model.row_inserted.connect (adapters_changed_cb);
+        client.adapter_model.row_deleted.connect (adapters_changed_cb);
+        adapters_changed_cb ();
     }
 
     private BluetoothMenuItem? find_menu_item (string address)
@@ -172,6 +176,26 @@ public class BluetoothIndicator
         item.update (type, proxy, alias, icon, connected, services, uuids);
     }
 
+    private void adapters_changed_cb ()
+    {
+        bluetooth_service._visible = client.adapter_model.iter_n_children (null) > 0;
+        var builder = new VariantBuilder (VariantType.ARRAY);
+        builder.add ("{sv}", "Visible", new Variant.boolean (bluetooth_service._visible));
+        try
+        {
+            var properties = new Variant ("(sa{sv}as)", "com.canonical.indicator.bluetooth.service", builder, null);
+            bus.emit_signal (null,
+                             "/com/canonical/indicator/bluetooth/service",
+                             "org.freedesktop.DBus.Properties",
+                             "PropertiesChanged",
+                             properties);
+        }
+        catch (Error e)
+        {
+            warning ("Failed to emit signal: %s", e.message);
+        }
+    }
+
     private void device_removed_cb (Gtk.TreePath path)
     {
         Gtk.TreeIter iter;
@@ -393,6 +417,11 @@ public static int main (string[] args)
 [DBus (name = "com.canonical.indicator.bluetooth.service")]
 private class BluetoothService : Object
 {
+    internal bool _visible = false;
+    public bool visible
+    {
+        get { return _visible; }
+    }
     internal string _icon_name = "bluetooth-active";
     public string icon_name
     {
diff --git a/src/indicator-bluetooth.vala b/src/indicator-bluetooth.vala
index 4f3aef8..bfbbc9f 100644
--- a/src/indicator-bluetooth.vala
+++ b/src/indicator-bluetooth.vala
@@ -26,6 +26,9 @@ public class BluetoothIndicator : Indicator.Object
 
         var menu_client = menu.get_client ();
         menu_client.add_type_handler_full ("x-canonical-switch", new_switch_cb);
+
+        /* Hide until ready */
+        set_visible (false);
     }
 
     private bool new_switch_cb (Dbusmenu.Menuitem newitem, Dbusmenu.Menuitem parent, Dbusmenu.Client client)
@@ -80,6 +83,7 @@ public class BluetoothIndicator : Indicator.Object
 
     private void server_properties_changed_cb ()
     {
+        set_visible (proxy.visible);
         Indicator.image_helper_update (image, proxy.icon_name);
         accessible_description = proxy.accessible_description;
     }
@@ -122,6 +126,7 @@ public class Switch : Ido.SwitchMenuItem
 [DBus (name = "com.canonical.indicator.bluetooth.service")]
 public interface BluetoothService : DBusProxy
 {
+    public abstract bool visible { owned get; }
     public abstract string icon_name { owned get; }
     public abstract string accessible_description { owned get; }
 }
-- 
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