Add indication of what players are building

OpenRA.Mods.RA/Widgets/ObserverBuildIconWidget.cs

@@ -0,0 +1,80 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2012 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;
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Graphics;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.RA.Widgets
+{
+	public class ObserverBuildIconWidget : Widget
+	{
+		public Func<Player> GetPlayer;
+		public Func<string> GetQueue;
+		Dictionary<string, Sprite> iconSprites;
+		World world;
+		WorldRenderer worldRenderer;
+
+		[ObjectCreator.UseCtor]
+		public ObserverBuildIconWidget(World world, WorldRenderer worldRenderer)
+			: base()
+		{
+			iconSprites = Rules.Info.Values.Where(u => u.Traits.Contains<BuildableInfo>() && u.Name[0] != '^')
+				.ToDictionary(
+				u => u.Name,
+				u => Game.modData.SpriteLoader.LoadAllSprites(u.Traits.Get<TooltipInfo>().Icon ?? (u.Name + "icon"))[0]);
+			this.world = world;
+			this.worldRenderer = worldRenderer;
+		}
+
+		protected ObserverBuildIconWidget(ObserverBuildIconWidget other)
+			: base(other)
+		{
+			GetPlayer = other.GetPlayer;
+			GetQueue = other.GetQueue;
+			iconSprites = other.iconSprites;
+			world = other.world;
+			worldRenderer = other.worldRenderer;
+		}
+
+		public override void Draw()
+		{
+			var player = GetPlayer();
+			var queue = GetQueue();
+			if (player == null || queue == null)
+			{
+				return;
+			}
+			var production = world.ActorsWithTrait<ProductionQueue>()
+				.Where(a => a.Actor.Owner == player && a.Trait.Info.Type == queue)
+				.Select(a => a.Trait)
+				.FirstOrDefault();
+			if (production == null)
+			{
+				return;
+			}
+			var item = production.CurrentItem();
+			if (item == null)
+			{
+				return;
+			}
+			var location = new float2(RenderBounds.Location);
+			var sprite = iconSprites[item.Item];
+			WidgetUtils.DrawSHP(sprite, location, worldRenderer, sprite.size / new float2(2, 2));
+		}
+
+		public override Widget Clone()
+		{
+			return new ObserverBuildIconWidget(this);
+		}
+	}
+}