Add capture progress bars and blinking.

OpenRA.Mods.Common/Traits/CapturableProgressBar.cs

@@ -0,0 +1,56 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2018 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Drawing;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Visualize the progress of this actor being captured.")]
+	class CaptureProgressBarInfo : ITraitInfo, Requires<CapturesInfo>
+	{
+		public readonly Color Color = Color.Orange;
+
+		public object Create(ActorInitializer init) { return new CaptureProgressBar(init.Self, this); }
+	}
+
+	class CaptureProgressBar : ISelectionBar, ICaptureProgressWatcher
+	{
+		readonly CaptureProgressBarInfo info;
+		int current;
+		int total;
+
+		public CaptureProgressBar(Actor self, CaptureProgressBarInfo info)
+		{
+			this.info = info;
+		}
+
+		void ICaptureProgressWatcher.Update(Actor self, Actor captor, Actor target, int current, int total)
+		{
+			if (self != captor)
+				return;
+
+			this.current = current;
+			this.total = total;
+		}
+
+		float ISelectionBar.GetValue()
+		{
+			if (total == 0)
+				return 0f;
+
+			return (float)current / total;
+		}
+
+		Color ISelectionBar.GetColor() { return info.Color; }
+		bool ISelectionBar.DisplayWhenEmpty { get { return false; } }
+	}
+}