Fixed building placement input behaviour.

OpenRa.Game/Controller.cs

@@ -28,6 +28,10 @@ namespace OpenRa.Game
             {
 				if (!(orderGenerator is PlaceBuilding))
 					dragStart = dragEnd = xy;
+
+				if (orderGenerator != null)
+					foreach (var order in orderGenerator.Order(game, xy.ToInt2()))
+						order.Apply(game, true);
             }
 
             if (mi.Button == MouseButtons.Left && mi.Event == MouseInputEvent.Move)
@@ -55,7 +59,7 @@ namespace OpenRa.Game
 			if( mi.Button == MouseButtons.Right && mi.Event == MouseInputEvent.Down )
 				if( orderGenerator != null )
 					foreach( var order in orderGenerator.Order( game, xy.ToInt2() ) )
-						order.Apply( game );
+						order.Apply( game, false );
 		}
 
         public Pair<float2, float2>? SelectionBox

OpenRa.Game/MoveOrder.cs

@@ -6,7 +6,7 @@ namespace OpenRa.Game
 {
 	abstract class Order
 	{
-		public abstract void Apply( Game game );
+		public abstract void Apply( Game game, bool leftMButton );
 	}
 
 	class MoveOrder : Order
@@ -20,8 +20,9 @@ namespace OpenRa.Game
 			this.Destination = destination;
 		}
 
-		public override void Apply( Game game )
+		public override void Apply( Game game, bool leftMouseButton )
 		{
+			if (leftMouseButton) return;
 			Unit.traits.Get<Traits.Mobile>().destination = Destination;
 		}
 	}
@@ -37,8 +38,9 @@ namespace OpenRa.Game
 			Location = location;
 		}
 
-		public override void Apply( Game game )
+		public override void Apply( Game game, bool leftMouseButton )
 		{
+			if (leftMouseButton) return;
 			Unit.traits.Get<Traits.McvDeploy>().DeployLocation = Location;
 			var mobile = Unit.traits.Get<Traits.Mobile>();
 			mobile.destination = mobile.toCell;

OpenRa.Game/Sidebar.cs

@@ -207,7 +207,9 @@ namespace OpenRa.Game
 			this.xy = xy;
 		}
 
-		public override void Apply(Game game)
+		public override void Apply(Game game, bool leftMouseButton)
+		{
+			if (leftMouseButton)
 			{
 				game.world.AddFrameEndTask(_ =>
 				{
@@ -218,5 +220,14 @@ namespace OpenRa.Game
 					game.worldRenderer.uiOverlay.KillOverlay();
 				});
 			}
+			else
+			{
+				game.world.AddFrameEndTask(_ =>
+				{
+					game.controller.orderGenerator = null;
+					game.worldRenderer.uiOverlay.KillOverlay();
+				});
+			}
+		}
 	}
 }