Tie Minimap to ProvidesRadar trait

OpenRa.Game/Chrome.cs

@@ -143,16 +143,21 @@ namespace OpenRa.Game
 			DrawPower();
 			chromeRenderer.Flush();
 			DrawButtons();
-			
+			DrawMinimap();
 			int paletteHeight = DrawBuildPalette(currentTab);
 			DrawBuildTabs(paletteHeight);
 			DrawChat();
-
-			Game.minimap.Draw(new float2(Game.viewport.Width - 128,30));
 		}
 
+		void DrawMinimap()
+		{
+			var hasRadar = Game.world.Actors.Any(a => a.Owner == Game.LocalPlayer && a.traits.Contains<ProvidesRadar>() && a.traits.Get<ProvidesRadar>().IsActive());
+			if (hasRadar)
+				Game.minimap.Draw(new float2(Game.viewport.Width - 128, 30));
+		}
+		
 		void AddButton(Rectangle r, Action<bool> b) { buttons.Add(Pair.New(r, b)); }
-
+		
 		void DrawBuildTabs(int paletteHeight)
 		{
 			const int tabWidth = 24;

OpenRa.Game/OpenRa.Game.csproj

@@ -214,6 +214,7 @@
     <Compile Include="Traits\MineImmune.cs" />
     <Compile Include="Traits\Minelayer.cs" />
     <Compile Include="Traits\LimitedAmmo.cs" />
+    <Compile Include="Traits\ProvidesRadar.cs" />
     <Compile Include="Traits\Repairable.cs" />
     <Compile Include="Traits\Reservable.cs" />
     <Compile Include="Traits\SquishByTank.cs" />

OpenRa.Game/Traits/ProvidesRadar.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits
+{
+	class ProvidesRadar
+	{
+		Actor self;
+		public ProvidesRadar(Actor self)
+		{
+			this.self = self;
+		}
+		
+		public bool IsActive()
+		{
+			// TODO: Check for nearby MRJ
+			
+			// Check if powered
+			var b = self.traits.Get<Building>();
+			if (b != null && b.InsuffientPower())
+				return false;
+			
+			return true;
+		}
+	}
+}

units.ini

@@ -407,7 +407,7 @@ SpawnOffset=0,-4
 LongDesc=Produces and reloads helicopters
 [DOME]
 Description=Radar Dome
-Traits=Building, RenderBuilding
+Traits=Building, RenderBuilding, ProvidesRadar
 Dimensions=2,2
 Footprint=xx xx
 SelectionPriority=3