From d1f64cfbfcbe24bd304f754837e6983cb2db5e46 Mon Sep 17 00:00:00 2001
From: Huo Yaoyuan <huoyaoyuan@hotmail.com>
Date: Mon, 7 Nov 2016 21:30:25 +0800
Subject: [PATCH] Make external changes into history.

---
 osu.Game/Overlays/MusicController.cs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/osu.Game/Overlays/MusicController.cs b/osu.Game/Overlays/MusicController.cs
index c9099921cf..043ae6e795 100644
--- a/osu.Game/Overlays/MusicController.cs
+++ b/osu.Game/Overlays/MusicController.cs
@@ -213,7 +213,8 @@ namespace osu.Game.Overlays
         {
             if (beatmapSource.Value == current) return;
             current = beatmapSource.Value;
-            updateCurrent(current, null);
+            updateCurrent(current, true);
+            appendToHistory(current.BeatmapInfo);
         }
 
         private void appendToHistory(BeatmapInfo beatmap)
@@ -248,7 +249,7 @@ namespace osu.Game.Overlays
             }
         }
 
-        private void play(BeatmapInfo info, bool? isNext)
+        private void play(BeatmapInfo info, bool isNext)
         {
             current = database.GetWorkingBeatmap(info, current);
             Task.Run(() =>
@@ -260,7 +261,7 @@ namespace osu.Game.Overlays
             updateCurrent(current, isNext);
         }
 
-        private void updateCurrent(WorkingBeatmap beatmap, bool? isNext)
+        private void updateCurrent(WorkingBeatmap beatmap, bool isNext)
         {
             BeatmapMetadata metadata = beatmap.Beatmap.Metadata;
             title.Text = metadata.TitleUnicode ?? metadata.Title;
@@ -270,13 +271,13 @@ namespace osu.Game.Overlays
 
             Add(newBackground);
 
-            if (isNext == true)
+            if (isNext)
             {
                 newBackground.Position = new Vector2(400, 0);
                 newBackground.MoveToX(0, 500, EasingTypes.OutCubic);
                 backgroundSprite.MoveToX(-400, 500, EasingTypes.OutCubic);
             }
-            else if (isNext == false)
+            else
             {
                 newBackground.Position = new Vector2(-400, 0);
                 newBackground.MoveToX(0, 500, EasingTypes.OutCubic);