make ProductionBar actually work for all RA stuff

OpenRA.Game/Traits/Selectable.cs

@@ -53,9 +53,13 @@ namespace OpenRA.Traits
 
 			foreach (var extraBar in self.TraitsImplementing<ISelectionBar>())
 			{
-				DrawSelectionBar(self, xy, Xy, extraBar.GetValue(), extraBar.GetColor());
+				var value = extraBar.GetValue();
+				if (value != 0)
+				{
 					xy.Y += 4;
 					Xy.Y += 4;
+					DrawSelectionBar(self, xy, Xy, extraBar.GetValue(), extraBar.GetColor());
+				}
 			}
 		}
 		

OpenRA.Mods.RA/ProductionBar.cs

@@ -9,16 +9,37 @@
 #endregion
 
 using System.Drawing;
+using System.Linq;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
 {
-	class ProductionBarInfo : TraitInfo<ProductionBar> { }
+	class ProductionBarInfo : ITraitInfo
+	{
+		public object Create(ActorInitializer init) { return new ProductionBar( init.self ); }
+	}
 
 	class ProductionBar : ISelectionBar
 	{
-		public float GetValue() { return .5f; }
+		Actor self;
+		public ProductionBar(Actor self) { this.self = self; }
 
-		public Color GetColor() { return Color.CadetBlue; }
+		public float GetValue()
+		{
+			var queue = self.TraitOrDefault<ProductionQueue>();
+			if (queue == null)
+			{
+				var produces = self.Trait<Production>().Info.Produces;
+				queue = self.Owner.PlayerActor.TraitsImplementing<ProductionQueue>()
+					.First(q => produces.Contains(q.Info.Type));
+			}
+
+			if (queue == null || queue.CurrentItem() == null)
+				return 0f;
+
+			return 1 - (float)queue.CurrentItem().RemainingCost / queue.CurrentItem().TotalCost;
+		}
+
+		public Color GetColor() { return Color.SkyBlue; }
 	}
 }

mods/ra/rules/structures.yaml

@@ -116,6 +116,7 @@ SPEN:
 	-EmitInfantryOnSell:
 	RepairsUnits:
 	RallyPoint:
+	ProductionBar:
 
 SYRD:
 	InfiltrateForSupportPower:
@@ -171,6 +172,7 @@ SYRD:
 	-EmitInfantryOnSell:
 	RepairsUnits:
 	RallyPoint:
+	ProductionBar:
 
 IRON:
 	RequiresPower:
@@ -573,6 +575,7 @@ WEAP:
 		Produces: Vehicle
 	PrimaryBuilding:
 	IronCurtainable:
+	ProductionBar:
 
 FACT:
 	Inherits: ^Building
@@ -603,6 +606,8 @@ FACT:
 		IntoActor: mcv
 		Offset:1,1
 		Facing: 96
+	ProductionBar:
+		
 PROC:
 	Inherits: ^Building
 	Buildable:
@@ -705,6 +710,7 @@ HPAD:
 	BelowUnits:
 	Reservable:
 	IronCurtainable:
+	ProductionBar:
 
 AFLD:
 	Inherits: ^Building
@@ -755,6 +761,8 @@ AFLD:
 		Prerequisites: AFLD
 		DropItems: E1,E1,E1,E3,E3
 		SelectTargetSound: slcttgt1.aud
+	ProductionBar:
+	
 POWR:
 	Inherits: ^Building
 	Buildable:
@@ -875,6 +883,7 @@ BARR:
 		Produces: Infantry
 	PrimaryBuilding:
 	IronCurtainable:
+	ProductionBar:
 
 TENT:
 	Inherits: ^Building
@@ -913,6 +922,7 @@ TENT:
 		Produces: Infantry
 	PrimaryBuilding:
 	IronCurtainable:
+	ProductionBar:
 
 FIX:
 	Inherits: ^Building