From dcfef6b44383c48246ab2a648b13855d13e8834c Mon Sep 17 00:00:00 2001
From: smoogipoo <smoogipoo@smgi.me>
Date: Fri, 8 May 2020 18:46:37 +0900
Subject: [PATCH] Add clear method to EditorBeatmap

---
 osu.Game/Screens/Edit/EditorBeatmap.cs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/osu.Game/Screens/Edit/EditorBeatmap.cs b/osu.Game/Screens/Edit/EditorBeatmap.cs
index 2e8e03bc73..23c8c9f605 100644
--- a/osu.Game/Screens/Edit/EditorBeatmap.cs
+++ b/osu.Game/Screens/Edit/EditorBeatmap.cs
@@ -4,6 +4,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 using JetBrains.Annotations;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
@@ -201,6 +202,25 @@ namespace osu.Game.Screens.Edit
             updateHitObject(null, true);
         }
 
+        /// <summary>
+        /// Clears all <see cref="HitObjects"/> from this <see cref="EditorBeatmap"/>.
+        /// </summary>
+        public void Clear()
+        {
+            var removed = HitObjects.ToList();
+
+            mutableHitObjects.Clear();
+
+            foreach (var b in startTimeBindables)
+                b.Value.UnbindAll();
+            startTimeBindables.Clear();
+
+            foreach (var h in removed)
+                HitObjectRemoved?.Invoke(h);
+
+            updateHitObject(null, true);
+        }
+
         private void trackStartTime(HitObject hitObject)
         {
             startTimeBindables[hitObject] = hitObject.StartTimeBindable.GetBoundCopy();