Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/Widgets/TooltipContainerWidget.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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;
+using OpenRA.Graphics;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets
+{
+	public class TooltipContainerWidget : Widget
+	{
+		static readonly Action Nothing = () => { };
+		readonly GraphicSettings graphicSettings;
+
+		public int2 CursorOffset = new(0, 20);
+		public int BottomEdgeYOffset = -5;
+
+		public Action BeforeRender = Nothing;
+		public int TooltipDelayMilliseconds = 200;
+		Widget tooltip;
+		int nextToken = 1;
+		int currentToken;
+		string id;
+		WidgetArgs widgetArgs;
+
+		public TooltipContainerWidget()
+		{
+			graphicSettings = Game.Settings.Graphics;
+			IsVisible = () =>
+			{
+				// PERF: Only load widget once visible.
+				var visible = Game.RunTime > Viewport.LastMoveRunTime + TooltipDelayMilliseconds;
+				if (visible)
+					LoadWidget();
+
+				return visible;
+			};
+		}
+
+		void LoadWidget()
+		{
+			if (id == null || tooltip != null)
+				return;
+
+			tooltip = Ui.LoadWidget(id, this, new WidgetArgs(widgetArgs) { { "tooltipContainer", this } });
+		}
+
+		public int SetTooltip(string id, WidgetArgs args)
+		{
+			RemoveTooltip();
+			currentToken = nextToken++;
+			tooltip = null;
+			this.id = id;
+			widgetArgs = args;
+			return currentToken;
+		}
+
+		public void RemoveTooltip(int token)
+		{
+			if (currentToken != token)
+				return;
+
+			tooltip = null;
+			id = null;
+			widgetArgs = null;
+
+			RemoveChildren();
+			BeforeRender = Nothing;
+		}
+
+		public void RemoveTooltip()
+		{
+			RemoveTooltip(currentToken);
+		}
+
+		public override void Draw()
+		{
+			BeforeRender();
+		}
+
+		public override bool EventBoundsContains(int2 location) { return false; }
+
+		public override int2 ChildOrigin
+		{
+			get
+			{
+				var scale = graphicSettings.CursorDouble ? 2 : 1;
+				var pos = Viewport.LastMousePos + scale * CursorOffset;
+				if (tooltip != null)
+				{
+					// If the tooltip overlaps the right edge of the screen, move it left until it fits
+					if (pos.X + tooltip.Bounds.Right > Game.Renderer.Resolution.Width)
+						pos = pos.WithX(Game.Renderer.Resolution.Width - tooltip.Bounds.Right);
+
+					// If the tooltip overlaps the bottom edge of the screen, switch tooltip above cursor
+					if (pos.Y + tooltip.Bounds.Bottom > Game.Renderer.Resolution.Height)
+						pos = pos.WithY(Viewport.LastMousePos.Y + scale * BottomEdgeYOffset - tooltip.Bounds.Height);
+				}
+
+				return pos;
+			}
+		}
+
+		public override string GetCursor(int2 pos) { return null; }
+	}
+}