Reimplement production queue switching from selection.

OpenRA.Mods.Cnc/ProductionQueueFromSelection.cs

@@ -0,0 +1,46 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 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.Traits;
+using OpenRA.Widgets;
+using OpenRA.Mods.Cnc.Widgets;
+
+namespace OpenRA.Mods.RA.Widgets
+{
+	class ProductionQueueFromSelectionInfo : ITraitInfo
+	{
+		public string ProductionTabsWidget = null;
+		public object Create( ActorInitializer init ) { return new ProductionQueueFromSelection(init.world, this); }
+	}
+
+	class ProductionQueueFromSelection : INotifySelection
+	{
+		ProductionQueueFromSelectionInfo info;
+		readonly World world;
+
+		public ProductionQueueFromSelection(World world, ProductionQueueFromSelectionInfo info)
+		{
+			this.world = world;
+			this.info = info;
+		}
+
+		public void SelectionChanged()
+		{
+			// Find an actor with a queue
+			var producer = world.Selection.Actors.FirstOrDefault(a => a.IsInWorld
+			                                                     && a.World.LocalPlayer == a.Owner
+			                                                     && a.HasTrait<ProductionQueue>());
+			if (producer != null)			
+				Widget.RootWidget.GetWidget<ProductionTabsWidget>(info.ProductionTabsWidget)
+					.SelectQueue(producer.TraitsImplementing<ProductionQueue>().First());
+		}
+	}
+}