Start implementing new tooltip bits. Test tooltips added for buttons and production palette.

OpenRA.Mods.Cnc/Widgets/TooltipContainerWidget.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 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.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using OpenRA.FileFormats;
+using OpenRA.Graphics;
+using OpenRA.Mods.RA;
+using OpenRA.Widgets;
+using System;
+
+namespace OpenRA.Mods.Cnc.Widgets
+{
+	class TooltipContainerWidget : Widget
+	{
+		public int2 CursorOffset = new int2(20, 0);
+		public int TooltipDelay = 10;
+		Widget tooltip;
+
+		public TooltipContainerWidget()
+		{
+			IsVisible = () => Viewport.TicksSinceLastMove >= TooltipDelay;
+		}
+
+		public void SetTooltip(Widget tooltip)
+		{
+			this.tooltip = tooltip;
+			RemoveChildren();
+			AddChild(tooltip);
+		}
+
+		public void RemoveTooltip()
+		{
+			RemoveChildren();
+		}
+
+		public override Rectangle GetEventBounds() { return Rectangle.Empty; }
+		public override int2 ChildOrigin
+		{
+			get
+			{
+				var pos = Viewport.LastMousePos + CursorOffset;
+				if (tooltip != null)
+				{
+					if (pos.X + tooltip.Bounds.Right > Game.viewport.Width)
+						pos.X -= 2*CursorOffset.X + tooltip.Bounds.Right;
+				}
+
+				return pos;
+			}
+		}
+
+        public override string GetCursor(int2 pos) { return null; }
+        public override Widget Clone() { throw new NotImplementedException(); }
+	}
+}