Fix class name

osu.Game/Graphics/Containers/HoldToConfirmContainer.cs

@@ -0,0 +1,52 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using osu.Framework.Configuration;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+
+namespace osu.Game.Graphics.Containers
+{
+    public abstract class HoldToConfirmContainer : Container
+    {
+        public Action Action;
+
+        private const int activate_delay = 400;
+        private const int fadeout_delay = 200;
+
+        private bool fired;
+        private bool confirming;
+
+        /// <summary>
+        /// Whether the overlay should be allowed to return from a fired state.
+        /// </summary>
+        protected virtual bool AllowMultipleFires => false;
+
+        public Bindable<double> Progress = new BindableDouble();
+
+        protected void BeginConfirm()
+        {
+            if (confirming || !AllowMultipleFires && fired) return;
+
+            confirming = true;
+
+            this.TransformBindableTo(Progress, 1, activate_delay * (1 - Progress.Value), Easing.Out).OnComplete(_ => Confirm());
+        }
+
+        protected virtual void Confirm()
+        {
+            Action?.Invoke();
+            fired = true;
+        }
+
+        protected void AbortConfirm()
+        {
+            if (!AllowMultipleFires && fired) return;
+
+            confirming = false;
+
+            this.TransformBindableTo(Progress, 0, fadeout_delay, Easing.Out);
+        }
+    }
+}