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/MouseAttachmentWidget.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 OpenRA.Graphics;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets
+{
+	public class MouseAttachmentWidget : Widget
+	{
+		public bool ClickThrough = true;
+
+		Sprite sprite;
+		readonly WorldRenderer worldRenderer;
+		readonly GraphicSettings graphicSettings;
+		string palette;
+		int2 location;
+
+		[ObjectCreator.UseCtor]
+		public MouseAttachmentWidget(WorldRenderer worldRenderer)
+		{
+			this.worldRenderer = worldRenderer;
+			graphicSettings = Game.Settings.Graphics;
+		}
+
+		public override void Draw()
+		{
+			if (sprite != null && palette != null)
+			{
+				var directionPalette = worldRenderer.Palette(palette);
+
+				// Cursor is rendered in native window coordinates
+				// Apply same scaling rules as hardware cursors
+				var scale = (graphicSettings.CursorDouble ? 2 : 1) * (Game.Renderer.NativeWindowScale > 1.5f ? 2 : 1);
+				WidgetUtils.DrawSpriteCentered(sprite, directionPalette, ChildOrigin, scale / Game.Renderer.WindowScale);
+			}
+		}
+
+		public void SetAttachment(int2 location, Sprite sprite, string palette)
+		{
+			this.sprite = sprite;
+			this.location = location;
+			this.palette = palette;
+		}
+
+		public void Reset()
+		{
+			sprite = null;
+			palette = null;
+		}
+
+		public override int2 ChildOrigin => location;
+	}
+}