From b08b24b6da17260a2a028b6a070e36093429f6a4 Mon Sep 17 00:00:00 2001
From: Roman Kapustin <TocoToucanMS@gmail.com>
Date: Fri, 4 May 2018 21:18:48 +0300
Subject: [PATCH] Introduce OsuScreen.AllowBackButton property

---
 osu.Game/Screens/OsuScreen.cs         | 24 ++++++++----------------
 osu.Game/Screens/Play/PlayerLoader.cs |  1 +
 2 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/osu.Game/Screens/OsuScreen.cs b/osu.Game/Screens/OsuScreen.cs
index 5d2c46f438..fb5d3d12e6 100644
--- a/osu.Game/Screens/OsuScreen.cs
+++ b/osu.Game/Screens/OsuScreen.cs
@@ -22,6 +22,8 @@ namespace osu.Game.Screens
     {
         public BackgroundScreen Background { get; private set; }
 
+        protected virtual bool AllowBackButton => true;
+
         /// <summary>
         /// Override to create a BackgroundMode for the current screen.
         /// Note that the instance created may not be the used instance if it matches the BackgroundMode equality clause.
@@ -92,26 +94,16 @@ namespace osu.Game.Screens
 
         public bool OnPressed(GlobalAction action)
         {
-            switch (action)
+            if (action == GlobalAction.Back && AllowBackButton)
             {
-                case GlobalAction.Back:
-                    Exit();
-                    return true;
-                default:
-                    return false;
+                Exit();
+                return true;
             }
+
+            return false;
         }
 
-        public bool OnReleased(GlobalAction action)
-        {
-            switch (action)
-            {
-                case GlobalAction.Back:
-                    return true;
-                default:
-                    return false;
-            }
-        }
+        public bool OnReleased(GlobalAction action) => action == GlobalAction.Back && AllowBackButton;
 
         protected override void OnResuming(Screen last)
         {
diff --git a/osu.Game/Screens/Play/PlayerLoader.cs b/osu.Game/Screens/Play/PlayerLoader.cs
index 56fbd7b6e7..6eb156914e 100644
--- a/osu.Game/Screens/Play/PlayerLoader.cs
+++ b/osu.Game/Screens/Play/PlayerLoader.cs
@@ -27,6 +27,7 @@ namespace osu.Game.Screens.Play
 
         private bool showOverlays = true;
         public override bool ShowOverlaysOnEnter => showOverlays;
+        protected override bool AllowBackButton => false;
 
         private Task loadTask;