move widget code to commons

OpenRA.Mods.Common/Widgets/Logic/Ingame/SupportPowerBinLogic.cs

@@ -0,0 +1,72 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets.Logic
+{
+	public class SupportPowerBinLogic
+	{
+		[ObjectCreator.UseCtor]
+		public SupportPowerBinLogic(Widget widget, World world)
+		{
+			var palette = widget.Get<SupportPowersWidget>("SUPPORT_PALETTE");
+
+			var background = widget.GetOrNull("PALETTE_BACKGROUND");
+			var foreground = widget.GetOrNull("PALETTE_FOREGROUND");
+			if (background != null || foreground != null)
+			{
+				Widget backgroundTemplate = null;
+				Widget foregroundTemplate = null;
+
+				if (background != null)
+					backgroundTemplate = background.Get("ICON_TEMPLATE");
+
+				if (foreground != null)
+					foregroundTemplate = foreground.Get("ICON_TEMPLATE");
+
+				Action<int, int> updateBackground = (_, icons) =>
+				{
+					var rowHeight = palette.IconSize.Y + palette.IconMargin;
+
+					if (background != null)
+					{
+						background.RemoveChildren();
+
+						for (var i = 0; i < icons; i++)
+						{
+							var row = backgroundTemplate.Clone();
+							row.Bounds.Y += i * rowHeight;
+							background.AddChild(row);
+						}
+					}
+
+					if (foreground != null)
+					{
+						foreground.RemoveChildren();
+
+						for (var i = 0; i < icons; i++)
+						{
+							var row = foregroundTemplate.Clone();
+							row.Bounds.Y += i * rowHeight;
+							foreground.AddChild(row);
+						}
+					}
+				};
+
+				palette.OnIconCountChanged += updateBackground;
+
+				// Set the initial palette state
+				updateBackground(0, 0);
+			}
+		}
+	}
+}