Single Visibility enum type.

osu.Game/OsuGame.cs

@@ -31,7 +31,7 @@ namespace osu.Game
         {
             public string Path;
         }
-    
+
         public Toolbar Toolbar;
         public ChatConsole Chat;
         public MainMenu MainMenu => intro?.ChildGameMode as MainMenu;
@@ -40,7 +40,7 @@ namespace osu.Game
         private IpcChannel<ImportBeatmap> BeatmapIPC;
 
         public Bindable<PlayMode> PlayMode;
-        
+
         public OsuGame(string[] args)
         {
             this.args = args;
@@ -56,7 +56,7 @@ namespace osu.Game
         public override void Load(BaseGame game)
         {
             BeatmapIPC = new IpcChannel<ImportBeatmap>(Host);
-            
+
             if (!Host.IsPrimaryInstance)
             {
                 if (args.Length == 1 && File.Exists(args[0]))
@@ -83,7 +83,7 @@ namespace osu.Game
                     Console.WriteLine($@"Failed to import beatmap: {ex}");
                 }
             };
-            
+
             base.Load(game);
 
             //attach our bindables to the audio subsystem.
@@ -113,10 +113,10 @@ namespace osu.Game
                 }
             });
 
-            Toolbar.State = ToolbarState.Hidden;
+            Toolbar.State = Visibility.Hidden;
             Toolbar.Flush();
 
-            Chat.State = ChatConsoleState.Hidden;
+            Chat.State = Visibility.Hidden;
             Chat.Flush();
 
             intro.ModePushed += modeAdded;
@@ -134,10 +134,10 @@ namespace osu.Game
             switch (args.Key)
             {
                 case Key.F8:
-                    Chat.State = Chat.State == ChatConsoleState.Hidden ? ChatConsoleState.Visible : ChatConsoleState.Hidden;
+                    Chat.State = Chat.State.Reverse();
                     return true;
             }
-            
+
             return base.OnKeyDown(state, args);
         }
 
@@ -152,12 +152,12 @@ namespace osu.Game
             //central game mode change logic.
             if (newMode is Player || newMode is Intro)
             {
-                Toolbar.State = ToolbarState.Hidden;
+                Toolbar.State = Visibility.Hidden;
-                Chat.State = ChatConsoleState.Hidden;
+                Chat.State = Visibility.Hidden;
             }
             else
             {
-                Toolbar.State = ToolbarState.Visible;
+                Toolbar.State = Visibility.Visible;
             }
 
             Cursor.FadeIn(100);
@@ -178,7 +178,7 @@ namespace osu.Game
                 });
                 return true;
             }
-            
+
             return base.OnExiting();
         }
 

osu.Game/Overlays/ChatConsole.cs

@@ -25,7 +25,7 @@ using osu.Framework;
 
 namespace osu.Game.Overlays
 {
-    public class ChatConsole : Container, IStateful<ChatConsoleState>
+    public class ChatConsole : Container, IStateful<Visibility>
     {
         private ChannelDisplay channelDisplay;
 
@@ -140,9 +140,9 @@ namespace osu.Game.Overlays
             api.Queue(fetchReq);
         }
 
-        private ChatConsoleState state;
+        private Visibility state;
 
-        public ChatConsoleState State
+        public Visibility State
         {
             get { return state; }
 
@@ -154,11 +154,11 @@ namespace osu.Game.Overlays
 
                 switch (state)
                 {
-                    case ChatConsoleState.Hidden:
+                    case Visibility.Hidden:
                         MoveToY(-Size.Y, transition_length, EasingTypes.InQuint);
                         FadeOut(transition_length, EasingTypes.InQuint);
                         break;
-                    case ChatConsoleState.Visible:
+                    case Visibility.Visible:
                         MoveToY(0, transition_length, EasingTypes.OutQuint);
                         FadeIn(transition_length, EasingTypes.OutQuint);
                         break;
@@ -166,10 +166,4 @@ namespace osu.Game.Overlays
             }
         }
     }
-
-    public enum ChatConsoleState
-    {
-        Visible,
-        Hidden,
-    }
 }

osu.Game/Overlays/Toolbar.cs

@@ -16,7 +16,7 @@ using osu.Framework;
 
 namespace osu.Game.Overlays
 {
-    public class Toolbar : Container, IStateful<ToolbarState>
+    public class Toolbar : Container, IStateful<Visibility>
     {
         const float height = 50;
 
@@ -26,9 +26,9 @@ namespace osu.Game.Overlays
 
         private ToolbarModeSelector modeSelector;
 
-        private ToolbarState state;
+        private Visibility state;
 
-        public ToolbarState State
+        public Visibility State
         {
             get { return state; }
             set
@@ -39,11 +39,11 @@ namespace osu.Game.Overlays
 
                 switch (state)
                 {
-                    case ToolbarState.Hidden:
+                    case Visibility.Hidden:
                         MoveToY(-Size.Y, transition_time, EasingTypes.InQuint);
                         FadeOut(transition_time, EasingTypes.InQuint);
                         break;
-                    case ToolbarState.Visible:
+                    case Visibility.Visible:
                         MoveToY(0, transition_time, EasingTypes.OutQuint);
                         FadeIn(transition_time, EasingTypes.OutQuint);
                         break;
@@ -119,10 +119,4 @@ namespace osu.Game.Overlays
 
         public void SetGameMode(PlayMode mode) => modeSelector.SetGameMode(mode);
     }
-
-    public enum ToolbarState
-    {
-        Visible,
-        Hidden,
-    }
 }

osu.Game/Overlays/Visibility.cs

@@ -0,0 +1,17 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+namespace osu.Game.Overlays
+{
+    public enum Visibility
+    {
+        Hidden,
+        Visible
+    }
+
+    public static class OverlayVisibilityHelper
+    {
+        public static Visibility Reverse(this Visibility input)
+            => input == Visibility.Visible ? Visibility.Hidden : Visibility.Visible;
+    }
+}

osu.Game/osu.Game.csproj

@@ -160,6 +160,7 @@
     <Compile Include="Overlays\ToolbarButton.cs" />
     <Compile Include="Overlays\ToolbarModeButton.cs" />
     <Compile Include="Overlays\ToolbarModeSelector.cs" />
+    <Compile Include="Overlays\Visibility.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Users\User.cs" />
     <Compile Include="VolumeControl.cs" />