Added inline doc

Author: ekcoh

Assets/Samples/RebindingUI/OnScreen/Detector.cs

@@ -4,9 +4,15 @@
 
 namespace UnityEngine.InputSystem.Samples.RebindUI
 {
+    // Note that gesture event handler delegate takes an 'in' reference when 'ref readonly' would be preferrable.
+    // The reason for this is that this construct isn't available until C# 12.0.
+
+    /// <summary>
+    /// Base class for gesture detectors.
+    /// </summary>
     abstract class Detector : ITouchMonitor
     {
-        public delegate void GestureEventHandler(in GestureEvent gestureEvent); // ref readonly not available until C# 12.0
+        public delegate void GestureEventHandler(in GestureEvent gestureEvent);
 
         protected Detector(int maxTouches)
         {

Assets/Samples/RebindingUI/OnScreen/DragDetector.cs

@@ -2,10 +2,13 @@
 
 namespace UnityEngine.InputSystem.Samples.RebindUI
 {
-    class DragDetector : ITouchProcessor
+    /// <summary>
+    /// A gesture detector processor for "drag" a.k.a. "translate/pan" gestures.
+    /// </summary>
+    internal class DragDetector : ITouchProcessor
     {
-        private double m_InitialTime;
         private Vector2 m_InitialPosition;
+        private double m_InitialTime;
         private readonly float m_ThresholdSqr;
         private bool m_Valid;
 
@@ -17,6 +20,9 @@ public DragDetector(float threshold)
             m_Valid = false;
         }
 
+        #region ITouchProcessor implementation
+
+        /// <inheritdoc/>
         public void OnTouchBegin(Detector context, in TouchState[] touches, int count, int index)
         {
             if (count == 1)
@@ -38,6 +44,7 @@ public void OnTouchBegin(Detector context, in TouchState[] touches, int count, i
             }
         }
 
+        /// <inheritdoc/>
         public void OnTouchEnd(Detector context, in TouchState[] touches, int count, int index)
         {
             if (!m_Valid)
@@ -47,6 +54,7 @@ public void OnTouchEnd(Detector context, in TouchState[] touches, int count, int
             m_Valid = false;
         }
 
+        /// <inheritdoc/>
         public void OnTouchMoved(Detector context, in TouchState[] touches, int count, int index)
         {
             if (m_Valid)
@@ -64,6 +72,7 @@ public void OnTouchMoved(Detector context, in TouchState[] touches, int count, i
             }
         }
 
+        /// <inheritdoc/>
         public void OnTouchCanceled(Detector context, in TouchState[] touches, int count, int index)
         {
             if (m_Valid)
@@ -73,6 +82,8 @@ public void OnTouchCanceled(Detector context, in TouchState[] touches, int count
             }
         }
 
+        #endregion
+
         private void Fire(Detector context, in TouchState[] touches, int count, int index, GestureEvent.Flags phase)
         {
             GestureEvent @event = new GestureEvent(