Split the last TD UI logic into reuseable chunks.

OpenRA.Mods.RA/Widgets/Logic/Ingame/IngameRadarDisplayLogic.cs

@@ -0,0 +1,38 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Linq;
+using OpenRA.Mods.RA.Widgets;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.RA.Widgets.Logic
+{
+	public class IngameRadarDisplayLogic
+	{
+		[ObjectCreator.UseCtor]
+		public IngameRadarDisplayLogic(Widget widget, World world)
+		{
+			var radarEnabled = false;
+			var cachedRadarEnabled = false;
+			widget.Get<RadarWidget>("RADAR_MINIMAP").IsEnabled = () => radarEnabled;
+
+			var ticker = widget.Get<LogicTickerWidget>("RADAR_TICKER");
+			ticker.OnTick = () =>
+			{
+				radarEnabled = world.ActorsWithTrait<ProvidesRadar>()
+					.Any(a => a.Actor.Owner == world.LocalPlayer && a.Trait.IsActive);
+
+				if (radarEnabled != cachedRadarEnabled)
+					Sound.PlayNotification(world.Map.Rules, null, "Sounds", radarEnabled ? "RadarUp" : "RadarDown", null);
+				cachedRadarEnabled = radarEnabled;
+			};
+		}
+	}
+}