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Src/Unity/Scripts/UX/Input/OnScreenStick.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace BITKit.UX
+{
+    public class OnScreenStick:OnScreenControl
+    {
+        public new class UxmlTraits : OnScreenControl.UxmlTraits
+        {
+            private readonly UxmlBoolAttributeDescription m_IsDelteaAttribute = new ()
+            {
+                name = "IsDelta"
+            };
+
+            private readonly UxmlFloatAttributeDescription m_MoveRangeAttribute = new()
+            {
+                name = "MoveRange",defaultValue = 32,
+            };
+
+            public override void Init(VisualElement ve, IUxmlAttributes bag, CreationContext cc)
+            {
+                base.Init(ve, bag, cc);
+                var table = (OnScreenStick)ve;
+                table.IsDelta = m_IsDelteaAttribute.GetValueFromBag(bag, cc);
+                table.MoveRange=m_MoveRangeAttribute.GetValueFromBag(bag, cc);
+            }
+        }
+        public new class UxmlFactory : UxmlFactory<OnScreenStick, UxmlTraits> { }
+        public bool IsDelta { get; set; }
+        public float MoveRange { get; set; } = 32;
+        protected override string ControlPathInternal { get; set; }
+        private int _ignoreFrame=1;
+        private Vector2 _startPosition;
+        public OnScreenStick()
+        {
+            RegisterCallback<PointerDownEvent>(OnPointerDown);
+            RegisterCallback<PointerMoveEvent>(OnPointerMove);
+            RegisterCallback<PointerUpEvent>(OnPointerUp);
+        }
+
+        private void OnPointerUp(PointerUpEvent evt)
+        {
+            SendValueToControl(Vector2.zero);
+            _startPosition = evt.position;
+            _ignoreFrame = 1;
+        }
+
+        private void OnPointerDown(PointerDownEvent evt)
+        {
+            _ignoreFrame = 1;
+            _startPosition = evt.position;
+        }
+
+        private void OnPointerMove(PointerMoveEvent evt)
+        {
+            if (_ignoreFrame-- > 0)
+            {
+                return;
+            }
+
+            if (Vector2.Distance(evt.deltaPosition, default) > Vector2.Distance(_startPosition, evt.position))
+            {
+                return;
+            }
+
+            var pos = evt.deltaPosition;
+            if (IsDelta)
+            {
+                var newPos = evt.position;
+                pos = new Vector2(newPos.x, newPos.y) - _startPosition;
+
+                pos /= MoveRange;
+            }
+            SendValueToControl(new Vector2(pos.x, -pos.y));
+        }
+    }
+
+}