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/ScrollItemWidget.cs

@@ -0,0 +1,97 @@
+#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.Primitives;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets
+{
+	public class ScrollItemWidget : ButtonWidget
+	{
+		public new readonly string Background = "scrollitem";
+		public readonly bool EnableChildMouseOver = false;
+		public string ItemKey;
+
+		readonly CachedTransform<(bool, bool, bool, bool, bool), Sprite[]> getPanelCache;
+
+		[ObjectCreator.UseCtor]
+		public ScrollItemWidget(ModData modData)
+			: base(modData)
+		{
+			IsVisible = () => false;
+			VisualHeight = 0;
+			getPanelCache = WidgetUtils.GetCachedStatefulPanelImages(Background);
+		}
+
+		protected ScrollItemWidget(ScrollItemWidget other)
+			: base(other)
+		{
+			IsVisible = () => false;
+			VisualHeight = 0;
+			Key = other.Key;
+			Background = other.Background;
+			EnableChildMouseOver = other.EnableChildMouseOver;
+			getPanelCache = WidgetUtils.GetCachedStatefulPanelImages(Background);
+		}
+
+		public override void Initialize(WidgetArgs args)
+		{
+			base.Initialize(args);
+
+			// HACK: We want to default IgnoreChildMouseOver to true in this widget
+			// but still allow it to be disabled
+			IgnoreChildMouseOver = !EnableChildMouseOver;
+		}
+
+		public Func<bool> IsSelected = () => false;
+
+		public override void Draw()
+		{
+			if (string.IsNullOrEmpty(Background))
+				return;
+
+			// PERF: Only check for ourself or our direct children
+			var hover = Ui.MouseOverWidget == this;
+			if (!IgnoreChildMouseOver && !hover)
+				hover = Children.Contains(Ui.MouseOverWidget);
+
+			WidgetUtils.DrawPanel(RenderBounds, getPanelCache.Update((IsDisabled(), Depressed, hover, false, IsSelected() || IsHighlighted())));
+		}
+
+		public override ScrollItemWidget Clone() { return new ScrollItemWidget(this); }
+
+		public static ScrollItemWidget Setup(ScrollItemWidget template, Func<bool> isSelected, Action onClick)
+		{
+			var w = template.Clone();
+			w.IsVisible = () => true;
+			w.IsSelected = isSelected;
+			w.OnClick = onClick;
+			return w;
+		}
+
+		public static ScrollItemWidget Setup(ScrollItemWidget template, Func<bool> isSelected, Action onClick, Action onDoubleClick)
+		{
+			var w = Setup(template, isSelected, onClick);
+			w.OnDoubleClick = onDoubleClick;
+			return w;
+		}
+
+		public static ScrollItemWidget Setup(string key, ScrollItemWidget template, Func<bool> isSelected, Action onClick, Action onDoubleClick)
+		{
+			var w = Setup(template, isSelected, onClick);
+			w.OnDoubleClick = onDoubleClick;
+			w.ItemKey = key;
+			return w;
+		}
+	}
+}