upd

src/BattleSpeedControl.cs

@@ -0,0 +1,107 @@
+using System.Collections.Generic;
+using Cthangover.Core.Battle;
+using Cthangover.Core.Settings;
+using Godot;
+
+namespace Cthangover.TurnBattle
+{
+    /// <summary>
+    /// In-battle speed toggle bar (x1/x4/x8). Directly sets
+    /// Engine.TimeScale to globally accelerate the entire game loop —
+    /// not just animations. Persists the choice to GameData.Settings
+    /// so it survives scene reloads. <see cref="ResetToNormal"/> restores 1x
+    /// without saving and is the part the core scene consumes through
+    /// <see cref="IBattleSpeedControl"/> when battle ends.
+    /// </summary>
+	public partial class BattleSpeedControl : Control, IBattleSpeedControl
+	{
+		private readonly Dictionary<int, Button> _buttons = new();
+		private int _activeSpeed;
+
+		/// <summary>
+		/// Builds the speed bar in the constructor. Godot never runs a
+		/// <c>_Ready</c> override declared in a mod assembly, so the buttons and the
+		/// saved-speed restore must happen here. Anchors are used instead of a
+		/// viewport-size lookup because the viewport is unavailable before the node
+		/// enters the tree.
+		/// </summary>
+		public BattleSpeedControl()
+		{
+			var speeds = new[] { 1, 4, 8 };
+			var hbox = new HBoxContainer { Name = "SpeedButtons" };
+			hbox.Alignment = BoxContainer.AlignmentMode.Begin;
+
+			foreach (var speed in speeds)
+			{
+				var btn = new Button
+				{
+					Text = $"x{speed}",
+					CustomMinimumSize = new Vector2(48, 32)
+				};
+				btn.Pressed += () => OnSpeedSelected(speed);
+				hbox.AddChild(btn);
+				_buttons[speed] = btn;
+			}
+
+			AddChild(hbox);
+
+			AnchorLeft = 1f;
+			AnchorRight = 1f;
+			AnchorTop = 0f;
+			AnchorBottom = 0f;
+			OffsetLeft = -200f;
+			OffsetRight = -20f;
+			OffsetTop = 20f;
+			OffsetBottom = 52f;
+
+			ApplySavedSpeed();
+		}
+
+		/// <summary>
+		/// Restores the speed from <see cref="GameData.Settings.BattleSpeed"/>.
+		/// Called on <c>_Ready</c> to reapply the saved preference.
+		/// </summary>
+		public void ApplySavedSpeed()
+		{
+			var speed = GameData.Instance.Settings.BattleSpeed;
+			if (speed < 1 || speed > 8)
+				speed = 1;
+
+			_activeSpeed = speed;
+			Engine.TimeScale = speed;
+			UpdateHighlight();
+		}
+
+		/// <summary>
+		/// Resets <see cref="Engine.TimeScale"/> to 1.0x without
+		/// persisting to settings. Used when battle ends so the lobby
+		/// and menus run at normal speed regardless of the player's
+		/// in-battle preference.
+		/// </summary>
+		public void ResetToNormal()
+		{
+			Engine.TimeScale = 1.0f;
+		}
+
+		private void OnSpeedSelected(int speed)
+		{
+			_activeSpeed = speed;
+			Engine.TimeScale = speed;
+
+			var settings = GameData.Instance.Settings;
+			settings.BattleSpeed = speed;
+			settings.Save();
+
+			UpdateHighlight();
+		}
+
+		private void UpdateHighlight()
+		{
+			foreach (var kv in _buttons)
+			{
+				var isActive = kv.Key == _activeSpeed;
+				kv.Value.Modulate = isActive ? new Color(0.4f, 1f, 0.4f, 1f) : Colors.White;
+			}
+		}
+	}
+}