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Packages/UITool/Runtime/UIScroller/UIScrollerHorizontal.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace MuHua
+{
+    /// <summary>
+    /// 滑块(水平)
+    /// </summary>
+    public class UIScrollerHorizontal
+    {
+        /// <summary> 绑定的元素 </summary>
+        public readonly VisualElement element;
+        /// <summary> 绑定的画布 </summary>
+        public readonly VisualElement canvas;
+        /// <summary> 值改变时 </summary>
+        public event Action<float> ValueChanged;
+
+        public float value;
+        public bool isDragger;
+        public float originalPosition;
+        public float pointerPosition;
+
+        public VisualElement dragger => element.Q<VisualElement>("Dragger");
+
+        public UIScrollerHorizontal(VisualElement element, VisualElement canvas)
+        {
+            this.element = element;
+            this.canvas = canvas;
+
+            //设置事件
+            dragger.RegisterCallback<PointerDownEvent>(DraggerDown);
+            element.RegisterCallback<PointerDownEvent>(ElementDown);
+
+            canvas.RegisterCallback<PointerUpEvent>((evt) => isDragger = false);
+            canvas.RegisterCallback<PointerLeaveEvent>((evt) => isDragger = false);
+        }
+
+        public void DraggerDown(PointerDownEvent evt)
+        {
+            isDragger = true;
+            originalPosition = dragger.transform.position.x;
+            pointerPosition = UITool.GetMousePosition().x;
+        }
+        public void ElementDown(PointerDownEvent evt)
+        {
+            float offset = evt.localPosition.x - dragger.resolvedStyle.width * 0.5f;
+            float max = element.resolvedStyle.width - dragger.resolvedStyle.width;
+            float value = Mathf.InverseLerp(0, max, offset);
+            UpdateValue(value);
+        }
+
+        /// <summary> 更新状态 </summary>
+        public virtual void Update()
+        {
+            if (!isDragger) { return; }
+            float differ = UITool.GetMousePosition().x - pointerPosition;
+            float offset = differ + originalPosition;
+            float max = element.resolvedStyle.width - dragger.resolvedStyle.width;
+            float value = Mathf.InverseLerp(0, max, offset);
+            UpdateValue(value);
+        }
+
+        /// <summary> 更新值(0-1) </summary>
+        public void UpdateValue(float value)
+        {
+            this.value = value;
+            ValueChanged?.Invoke(value);
+            float max = element.resolvedStyle.width - dragger.resolvedStyle.width;
+            float x = Mathf.Lerp(0, max, value);
+            dragger.transform.position = new Vector3(x, 0);
+        }
+    }
+}

Packages/UITool/Runtime/UIScroller/UIScrollerHorizontal.cs.meta

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Packages/UITool/Runtime/UIScroller/UIScrollerVertical.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace MuHua
+{
+    /// <summary>
+    /// 滑块(垂直)
+    /// </summary>
+    public class UIScrollerVertical
+    {
+
+    }
+}

Packages/UITool/Runtime/UIScroller/UIScrollerVertical.cs.meta

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