Add basic DrawableHit (no graphics yet, just input).

osu.Game.Modes.Taiko/Objects/Drawable/DrawableHit.cs

@@ -0,0 +1,82 @@
+using OpenTK.Input;
+using osu.Framework.Input;
+using osu.Game.Modes.Objects.Drawables;
+using osu.Game.Modes.Taiko.Judgements;
+using System;
+using System.Collections.Generic;
+
+namespace osu.Game.Modes.Taiko.Objects.Drawable
+{
+    public abstract class DrawableHit : DrawableTaikoHitObject
+    {
+        /// <summary>
+        /// A list of keys which can result in hits for this HitObject.
+        /// </summary>
+        protected abstract List<Key> HitKeys { get; }
+
+        /// <summary>
+        /// A list of keys which this hit object will accept. These are the standard Taiko keys for now.
+        /// These should be moved to bindings later.
+        /// </summary>
+        private List<Key> validKeys = new List<Key>(new[] { Key.D, Key.F, Key.J, Key.K });
+
+        /// <summary>
+        /// Whether the last key pressed is a valid hit key.
+        /// </summary>
+        private bool validKeyPressed;
+
+        protected DrawableHit(TaikoHitObject hitObject)
+            : base(hitObject)
+        {
+        }
+
+        protected override void CheckJudgement(bool userTriggered)
+        {
+            if (!userTriggered)
+            {
+                if (Judgement.TimeOffset > HitObject.HitWindowGood)
+                    Judgement.Result = HitResult.Miss;
+                return;
+            }
+
+            double hitOffset = Math.Abs(Judgement.TimeOffset);
+
+            if (hitOffset > HitObject.HitWindowMiss)
+                return;
+
+            if (!validKeyPressed)
+                Judgement.Result = HitResult.Miss;
+            else if (hitOffset < HitObject.HitWindowGood)
+            {
+                Judgement.Result = HitResult.Hit;
+                Judgement.Score = hitOffset < HitObject.HitWindowGreat ? TaikoScoreResult.Great : TaikoScoreResult.Good;
+            }
+            else
+                Judgement.Result = HitResult.Miss;
+        }
+
+        protected virtual bool HandleKeyPress(Key key)
+        {
+            if (Judgement.Result.HasValue)
+                return false;
+
+            validKeyPressed = HitKeys.Contains(key);
+
+            return UpdateJudgement(true);
+        }
+
+        protected sealed override bool OnKeyDown(InputState state, KeyDownEventArgs args)
+        {
+            // Make sure we don't handle held-down keys
+            if (args.Repeat)
+                return false;
+
+            // Check if we've pressed a valid taiko key
+            if (!validKeys.Contains(args.Key))
+                return false;
+
+            // Handle it!
+            return HandleKeyPress(args.Key);
+        }
+    }
+}

osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj

@@ -50,6 +50,7 @@
     <Compile Include="Beatmaps\TaikoBeatmapConverter.cs" />
     <Compile Include="Beatmaps\TaikoBeatmapProcessor.cs" />
     <Compile Include="Judgements\TaikoJudgementInfo.cs" />
+    <Compile Include="Objects\Drawable\DrawableHit.cs" />
     <Compile Include="Objects\Drawable\DrawableTaikoHitObject.cs" />
     <Compile Include="Objects\TaikoHitType.cs" />
     <Compile Include="TaikoDifficultyCalculator.cs" />