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Assets/ModuleCore/ModuleAttribute/Editor/ModuleUIPanel/UIAttributeList.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+using MuHua;
+
+namespace MuHuaEditor {
+	/// <summary>
+	/// 属性 - UI列表
+	/// </summary>
+	public class UIAttributeList : ModuleUIPanel, UIControl {
+		/// <summary> 拖拽预览 </summary>
+		public VisualElement preview;
+		/// <summary> 鼠标位置 </summary>
+		public Vector2 mousePosition;
+		/// <summary> 偏移位置 </summary>
+		public Vector2 offsetPosition;
+		/// <summary> 项目列表 </summary>
+		public ModuleUIItems<UIItem, AttributeInstanceConst> items;
+
+		public UIAttributeList(VisualElement element, VisualTreeAsset templateAsset) : base(element) {
+			items = new ModuleUIItems<UIItem, AttributeInstanceConst>(element, templateAsset,
+			(data, element) => new UIItem(data, element, this));
+
+			element.RegisterCallback<MouseMoveEvent>(FloatingFunc);
+		}
+		private void FloatingFunc(MouseMoveEvent evt) {
+			mousePosition = evt.mousePosition;
+		}
+
+		public void Update() {
+			if (preview == null) { return; }
+			preview.transform.position = mousePosition - offsetPosition;
+		}
+
+		public void Dispose() => items.Release();
+
+		/// <summary> 初始化 </summary>
+		public void Initial(List<AttributeInstanceConst> list) {
+			items.Create(list);
+		}
+		/// <summary> 设置值 </summary>
+		// public void Settings(T value) => callback?.Invoke(value);
+
+		public void MouseDownEvent(VisualElement element) {
+			preview = element;
+			offsetPosition = mousePosition;
+			// Debug.Log($"{preview.worldBound.position} - {mousePosition}");
+			// offsetPosition = preview.worldBound.position - mousePosition;
+			// Debug.Log($"{preview.worldBound.position} = {mousePosition} + {offsetPosition}");
+		}
+		public void MouseUpEvent() {
+			if (preview == null) { return; }
+			preview.transform.position = Vector2.zero;
+
+			int insertIndex = GetInsertIndex(element, preview);
+			int oldIndex = element.IndexOf(preview);
+
+			// 修正插入索引
+			// if (insertIndex > oldIndex) insertIndex--;
+			Debug.Log($"插入位置 {insertIndex} - 旧位置 {oldIndex}");
+			// 重新排序UI和数据
+			if (oldIndex != insertIndex) { MovePreviewElement(oldIndex, insertIndex); }
+			preview = null;
+		}
+
+		/// <summary>
+		/// 获取插入索引
+		/// </summary>
+		private int GetInsertIndex(VisualElement parent, VisualElement preview) {
+			Vector2 previewCenter = preview.worldBound.center;
+			int insertIndex = 0;
+			for (int i = 0; i < parent.childCount; i++) {
+				var child = parent[i];
+				if (child == preview) continue;
+				if (previewCenter.y < child.worldBound.center.y) {
+					insertIndex = i;
+					break;
+				}
+				insertIndex = i + 1;
+			}
+			return insertIndex;
+		}
+
+		/// <summary>
+		/// 移动预览元素到新位置
+		/// </summary>
+		private void MovePreviewElement(int oldIndex, int newIndex) {
+			VisualElement temp = element[oldIndex];
+			// element.RemoveAt(oldIndex);
+			element.Insert(newIndex, temp);
+		}
+
+		/// <summary> UI项 </summary>
+		public class UIItem : ModuleUIItem<AttributeInstanceConst> {
+			public readonly UIAttributeList parent;
+
+			public Label Range => Q<Label>("Range");
+			public TextField Name => Q<TextField>("Name");
+			public EnumField Type => Q<EnumField>("Type");
+			public FloatField Value => Q<FloatField>("Value");
+
+			public UIItem(AttributeInstanceConst value, VisualElement element, UIAttributeList parent) : base(value, element) {
+				this.parent = parent;
+				Name.SetValueWithoutNotify(value.name);
+				Type.Init(value.type);
+				Type.SetValueWithoutNotify(value.type);
+				Value.SetValueWithoutNotify(value.defaultValue);
+				Range.text = $"{value.minValue} ~ {value.maxValue}";
+				element.RegisterCallback<MouseDownEvent>(MouseDownEvent);
+				element.RegisterCallback<MouseUpEvent>(MouseUpEvent);
+			}
+			public override void DefaultState() {
+				// Button.EnableInClassList("button-s", false);
+			}
+			public override void SelectState() {
+				// parent.Settings(value);
+				// Button.EnableInClassList("button-s", true);
+			}
+
+			private void MouseDownEvent(MouseDownEvent evt) => parent.MouseDownEvent(element);
+
+			private void MouseUpEvent(MouseUpEvent evt) => parent.MouseUpEvent();
+		}
+	}
+}

Assets/ModuleCore/ModuleAttribute/Editor/ModuleUIPanel/UIAttributeList.cs.meta

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