cleaning techtree & sidebar; building placement is mostly fixed

OpenRa.Game/PlaceBuildingOrder.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game
+{
+	class PlaceBuildingOrder : Order
+	{
+		PlaceBuilding building;
+		int2 xy;
+
+		public PlaceBuildingOrder(PlaceBuilding building, int2 xy)
+		{
+			this.building = building;
+			this.xy = xy;
+		}
+
+		public override void Apply(bool leftMouseButton)
+		{
+			if (leftMouseButton)
+			{
+				Game.world.AddFrameEndTask(_ =>
+				{
+					Log.Write("Player \"{0}\" builds {1}", building.Owner.PlayerName, building.Name);
+
+					//Adjust placement for cursor to be in middle
+					var footprint = Rules.Footprint.GetFootprint(building.Name);
+					int maxWidth = 0;
+					foreach (var row in footprint)
+						if (row.Length > maxWidth)
+							maxWidth = row.Length;
+
+					Game.world.Add(new Actor(building.Name, 
+						xy - new int2(maxWidth / 2, footprint.Length / 2), building.Owner));
+
+					Game.controller.orderGenerator = null;
+					Game.worldRenderer.uiOverlay.KillOverlay();
+				});
+			}
+			else
+			{
+				Game.world.AddFrameEndTask(_ =>
+				{
+					Game.controller.orderGenerator = null;
+					Game.worldRenderer.uiOverlay.KillOverlay();
+				});
+			}
+		}
+	}
+}