[Opt] 优化虚拟列表滚动和Scrollbar互斥问题

Editor/RecyclerView/RecyclerViewEditor.cs

@@ -329,20 +329,10 @@ namespace AlicizaX.UI.Editor
 
                 using (new EditorGUI.DisabledScope(isPlaying))
                 {
-                    bool previousScrollValue = _scroll.boolValue;
+                    EditorGUILayout.PropertyField(_scroll, new GUIContent("Scroll Mode"));
-                    EditorGUILayout.PropertyField(_scroll);
-
-                    if (_scroll.boolValue != previousScrollValue)
-                    {
-                        HandleScrollToggle();
-                    }
                 }
 
-                if (_scroll.boolValue)
-                {
                 DrawScrollBarSettings(isPlaying);
-                }
-
                 EditorGUILayout.PropertyField(_snap);
             }
             EditorGUILayout.EndVertical();
@@ -369,8 +359,6 @@ namespace AlicizaX.UI.Editor
 
         private void DrawScrollerSection(bool isPlaying)
         {
-            if (!_scroll.boolValue) return;
-
             EditorGUILayout.BeginVertical("box");
             {
                 EditorGUILayout.LabelField("Scroller Settings", EditorStyles.boldLabel);
@@ -500,29 +488,6 @@ namespace AlicizaX.UI.Editor
             _selectedScrollerIndex = 0;
         }
 
-        private void HandleScrollToggle()
-        {
-            if (!_scroll.boolValue)
-            {
-                RemoveScrollerComponent();
-                ClearScrollBar();
-            }
-        }
-
-        private void RemoveScrollerComponent()
-        {
-            var recyclerView = target as RecyclerView;
-            if (recyclerView == null) return;
-
-            var scrollerComponent = recyclerView.GetComponent<IScroller>();
-            if (scrollerComponent != null)
-            {
-                Undo.DestroyObjectImmediate(scrollerComponent as MonoBehaviour);
-            }
-
-            ClearScrollerReferences();
-        }
-
         #endregion
 
         #region Scrollbar Handling

Editor/RecyclerView/Res/ScrollView.prefab

@@ -100,7 +100,7 @@ MonoBehaviour:
   wheelSpeed: 30
   templates: []
   content: {fileID: 7227160576944475251}
-  showScrollBar: 0
+  scrollbarVisibility: 0
   scrollbar: {fileID: 0}
   _layoutManagerTypeName: AlicizaX.UI.LinearLayoutManager
   layoutManager:

Runtime/RecyclerView/Layout/LayoutManager.cs

@@ -250,4 +250,11 @@ namespace AlicizaX.UI
         AlwaysShow = 1,
         WhenScrollable = 2
     }
+
+    public enum ScrollMode
+    {
+        AlwaysDisable = 0,
+        AlwaysShow = 1,
+        WhenScrollable = 2
+    }
 }

Runtime/RecyclerView/RecyclerView.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Threading;
 using UnityEngine;
 using UnityEngine.EventSystems;
+using UnityEngine.Serialization;
 using UnityEngine.UI;
 
 namespace AlicizaX.UI
@@ -51,7 +52,7 @@ namespace AlicizaX.UI
         /// <summary>
         /// 是否启用滚动能力<E883BD>?
         /// </summary>
-        [HideInInspector] [SerializeField] private bool scroll;
+        [HideInInspector] [SerializeField] private ScrollMode scroll = ScrollMode.AlwaysShow;
 
         /// <summary>
         /// 是否在停止滚动后自动吸附到最近项<E8BF91>?
@@ -87,6 +88,7 @@ namespace AlicizaX.UI
         /// <summary>
         /// 是否显示滚动条<E58AA8>?
         /// </summary>
+        [FormerlySerializedAs("showScrollBar")]
         [HideInInspector] [SerializeField] private ScrollbarVisibility scrollbarVisibility;
 
         /// <summary>
@@ -221,7 +223,7 @@ namespace AlicizaX.UI
         /// <summary>
         /// 获取或设置是否启用滚动能力<E883BD>?
         /// </summary>
-        public bool Scroll
+        public ScrollMode Scroll
         {
             get => scroll;
             set
@@ -231,10 +233,9 @@ namespace AlicizaX.UI
 
                 if (scroller != null)
                 {
-                    scroller.InputEnabled = scroll;
-
                     scroller.WheelSpeed = wheelSpeed;
                     scroller.Snap = snap;
+                    UpdateScrollerState();
                 }
 
                 RequestLayout();
@@ -249,9 +250,8 @@ namespace AlicizaX.UI
             get => snap;
             set
             {
-                bool newSnap = value & scroll;
+                if (snap == value) return;
-                if (snap == newSnap) return;
+                snap = value;
-                snap = newSnap;
 
                 if (scroller != null)
                 {
@@ -687,7 +687,7 @@ namespace AlicizaX.UI
         /// </summary>
         private void ConfigureScrollbar()
         {
-            if (scrollbarVisibility == ScrollbarVisibility.AlwaysHide || scrollbar == null) return;
+            if (scrollbar == null) return;
 
             scrollbar.onValueChanged.AddListener(OnScrollbarChanged);
 
@@ -1145,7 +1145,7 @@ namespace AlicizaX.UI
         /// <param name="smooth">是否使用平滑滚动<E6BB9A>?/param>
         public void ScrollTo(int index, bool smooth = false)
         {
-            if (!scroll || scroller == null) return;
+            if (scroll == ScrollMode.AlwaysDisable || scroller == null) return;
 
             scroller.ScrollTo(layoutManager.IndexToPosition(index), smooth);
 
@@ -1167,7 +1167,7 @@ namespace AlicizaX.UI
         /// <param name="duration">平滑滚动时长，单位为秒<E4B8BA>?/param>
         public void ScrollToWithAlignment(int index, ScrollAlignment alignment, float offset = 0f, bool smooth = false, float duration = 0.3f)
         {
-            if (!scroll || scroller == null) return;
+            if (scroll == ScrollMode.AlwaysDisable || scroller == null) return;
 
             float targetPosition = CalculateScrollPositionWithAlignment(index, alignment, offset);
 
@@ -1392,16 +1392,17 @@ namespace AlicizaX.UI
             }
 
             bool shouldShow = ShouldShowScrollbar();
+            bool shouldInteract = shouldShow && ShouldEnableScrollbarInteraction();
             if (scrollbarVisibleState != shouldShow || scrollbar.gameObject.activeSelf != shouldShow)
             {
                 scrollbarVisibleState = shouldShow;
                 scrollbar.gameObject.SetActive(shouldShow);
             }
 
-            if (scrollbarInteractableState != shouldShow || scrollbar.interactable != shouldShow)
+            if (scrollbarInteractableState != shouldInteract || scrollbar.interactable != shouldInteract)
             {
-                scrollbarInteractableState = shouldShow;
+                scrollbarInteractableState = shouldInteract;
-                scrollbar.interactable = shouldShow;
+                scrollbar.interactable = shouldInteract;
             }
 
             if (shouldShow)
@@ -1417,7 +1418,7 @@ namespace AlicizaX.UI
         /// <returns>应显示滚动条时返<E697B6>?<see langword="true"/>；否则返<E58899>?<see langword="false"/><3E>?/returns>
         private bool ShouldShowScrollbar()
         {
-            if (scrollbarVisibility == ScrollbarVisibility.AlwaysHide || !scroll || scrollbar == null || scroller == null || layoutManager == null)
+            if (scrollbarVisibility == ScrollbarVisibility.AlwaysHide || scrollbar == null || scroller == null || layoutManager == null)
             {
                 return false;
             }
@@ -1437,11 +1438,6 @@ namespace AlicizaX.UI
                 return false;
             }
 
-            if (!ShouldLimitScrollToOverflow())
-            {
-                return true;
-            }
-
             return HasScrollableContent();
         }
 
@@ -1523,16 +1519,31 @@ namespace AlicizaX.UI
                 return;
             }
 
-            scroller.InputEnabled = scroll && (!ShouldLimitScrollToOverflow() || HasScrollableContent());
+            scroller.InputEnabled = ShouldEnableScrollInput();
         }
 
         /// <summary>
         /// 判断是否需要将滚动能力限制在内容溢出场景下才启用<E590AF>?
         /// </summary>
         /// <returns>需要仅在内容溢出时启用滚动返回 <see langword="true"/>；否则返<E58899>?<see langword="false"/><3E>?/returns>
-        private bool ShouldLimitScrollToOverflow()
+        private bool ShouldEnableScrollInput()
         {
-            return scrollbarVisibility == ScrollbarVisibility.WhenScrollable && SupportsOverflowCheck();
+            if (scroll == ScrollMode.AlwaysDisable)
+            {
+                return false;
+            }
+
+            if (scroll == ScrollMode.AlwaysShow)
+            {
+                return true;
+            }
+
+            return SupportsOverflowCheck() && HasScrollableContent();
+        }
+
+        private bool ShouldEnableScrollbarInteraction()
+        {
+            return ShouldEnableScrollInput() && HasValidScrollMetrics() && HasScrollableContent();
         }
 
         /// <summary>