Add key binding for tap button

osu.Game/Input/Bindings/GlobalActionContainer.cs

@@ -80,6 +80,7 @@ namespace osu.Game.Input.Bindings
             new KeyBinding(new[] { InputKey.K }, GlobalAction.EditorNudgeRight),
             new KeyBinding(new[] { InputKey.G }, GlobalAction.EditorCycleGridDisplayMode),
             new KeyBinding(new[] { InputKey.F5 }, GlobalAction.EditorTestGameplay),
+            new KeyBinding(new[] { InputKey.T }, GlobalAction.EditorTapForBPM),
             new KeyBinding(new[] { InputKey.Control, InputKey.H }, GlobalAction.EditorFlipHorizontally),
             new KeyBinding(new[] { InputKey.Control, InputKey.J }, GlobalAction.EditorFlipVertically),
             new KeyBinding(new[] { InputKey.Control, InputKey.Alt, InputKey.MouseWheelDown }, GlobalAction.EditorDecreaseDistanceSpacing),
@@ -322,5 +323,8 @@ namespace osu.Game.Input.Bindings
 
         [LocalisableDescription(typeof(GlobalActionKeyBindingStrings), nameof(GlobalActionKeyBindingStrings.DeselectAllMods))]
         DeselectAllMods,
+
+        [LocalisableDescription(typeof(GlobalActionKeyBindingStrings), nameof(GlobalActionKeyBindingStrings.EditorTapForBPM))]
+        EditorTapForBPM,
     }
 }

osu.Game/Localisation/GlobalActionKeyBindingStrings.cs

@@ -174,6 +174,11 @@ namespace osu.Game.Localisation
         /// </summary>
         public static LocalisableString EditorTimingMode => new TranslatableString(getKey(@"editor_timing_mode"), @"Timing mode");
 
+        /// <summary>
+        /// "Tap for BPM"
+        /// </summary>
+        public static LocalisableString EditorTapForBPM => new TranslatableString(getKey(@"editor_tap_for_bpm"), @"Tap for BPM");
+
         /// <summary>
         /// "Cycle grid display mode"
         /// </summary>

osu.Game/Screens/Edit/Timing/TapButton.cs

@@ -15,18 +15,21 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Effects;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
 using osu.Framework.Threading;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
+using osu.Game.Input.Bindings;
 using osu.Game.Overlays;
 using osuTK;
 using osuTK.Graphics;
+using osuTK.Input;
 
 namespace osu.Game.Screens.Edit.Timing
 {
-    internal class TapButton : CircularContainer
+    internal class TapButton : CircularContainer, IKeyBindingHandler<GlobalAction>
     {
         public const float SIZE = 140;
 
@@ -57,6 +60,8 @@ namespace osu.Game.Screens.Edit.Timing
 
         private const int light_count = 6;
 
+        private readonly List<double> tapTimings = new List<double>();
+
         [BackgroundDependencyLoader]
         private void load()
         {
@@ -257,7 +262,23 @@ namespace osu.Game.Screens.Edit.Timing
             base.OnMouseUp(e);
         }
 
-        private readonly List<double> tapTimings = new List<double>();
+        public bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
+        {
+            if (e.Action == GlobalAction.EditorTapForBPM && !e.Repeat)
+            {
+                // Direct through mouse handling to achieve animation
+                OnMouseDown(new MouseDownEvent(e.CurrentState, MouseButton.Left));
+                return true;
+            }
+
+            return false;
+        }
+
+        public void OnReleased(KeyBindingReleaseEvent<GlobalAction> e)
+        {
+            if (e.Action == GlobalAction.EditorTapForBPM)
+                OnMouseUp(new MouseUpEvent(e.CurrentState, MouseButton.Left));
+        }
 
         private void reset()
         {