From 3a4fb2ffedd25cf4945771673b45747dfef4142c Mon Sep 17 00:00:00 2001
From: Huo Yaoyuan <huoyaoyuan@hotmail.com>
Date: Thu, 1 Dec 2016 08:20:24 +0800
Subject: [PATCH] IsEnabled property for drag bar of music controller.

---
 osu.Game/Overlays/DragBar.cs         | 15 ++++++++++++++-
 osu.Game/Overlays/MusicController.cs |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/osu.Game/Overlays/DragBar.cs b/osu.Game/Overlays/DragBar.cs
index ee54d21d74..32a1ed4933 100644
--- a/osu.Game/Overlays/DragBar.cs
+++ b/osu.Game/Overlays/DragBar.cs
@@ -16,6 +16,18 @@ public class DragBar : Container
         public Action<float> SeekRequested;
         private bool isDragging;
 
+        private bool enabled;
+        public bool IsEnabled
+        {
+            get { return enabled; }
+            set
+            {
+                enabled = value;
+                if (!enabled)
+                    fill.Width = 0;
+            }
+        }
+
         public DragBar()
         {
             RelativeSizeAxes = Axes.X;
@@ -34,13 +46,14 @@ public DragBar()
 
         public void UpdatePosition(float position)
         {
-            if (isDragging) return;
+            if (isDragging || !IsEnabled) return;
 
             fill.Width = position;
         }
 
         private void seek(InputState state)
         {
+            if (!IsEnabled) return;
             float seekLocation = state.Mouse.Position.X / DrawWidth;
             SeekRequested?.Invoke(seekLocation);
             fill.Width = seekLocation;
diff --git a/osu.Game/Overlays/MusicController.cs b/osu.Game/Overlays/MusicController.cs
index e8be9efb1b..c69624bfda 100644
--- a/osu.Game/Overlays/MusicController.cs
+++ b/osu.Game/Overlays/MusicController.cs
@@ -240,6 +240,7 @@ void preferUnicode_changed(object sender, EventArgs e)
 
         private void workingChanged(object sender = null, EventArgs e = null)
         {
+            progress.IsEnabled = (beatmapSource.Value != null);
             if (beatmapSource.Value == current) return;
             bool audioEquals = current?.BeatmapInfo.AudioEquals(beatmapSource.Value.BeatmapInfo) ?? false;
             current = beatmapSource.Value;