341 lines
9.3 KiB
C#
341 lines
9.3 KiB
C#
using System;
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using UnityEngine;
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using UnityEngine.UI;
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public class DirectDragHandler : MonoBehaviour
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{
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[Tooltip("是否在拖拽时限制移动范围")]
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public bool restrictMovement = false;
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[Tooltip("拖拽范围限制（如果启用限制）")]
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public RectTransform movementBounds;
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[Tooltip("是否锁定垂直方向移动")]
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public bool lockVertical = false;
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[Tooltip("是否锁定水平方向移动")]
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public bool lockHorizontal = false;
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[Tooltip("拖拽时是否改变视觉效果")]
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public bool changeDragAppearance = true;
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[Tooltip("拖拽时的缩放")]
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public Vector3 dragScale = new Vector3(1.1f, 1.1f, 1.1f);
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// 原始位置和缩放
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private Vector3 originalPosition;
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private Vector3 originalScale;
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private RectTransform rectTransform;
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private float scaleFactor;
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// 拖拽状态
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private bool isDragging = false;
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[SerializeField]
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private ButtonUpDrag buttonUpDrag;
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private ScrollRect parentScrollRect;
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/// <summary>
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/// 检测拖拽位置是否可以放置
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/// </summary>
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private Func<Vector2, bool> checkValidFunction;
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private Action onStartDrag;
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private Action onEndDrag;
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/// <summary>
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/// 接收原始位置并返回调整后位置的函数
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/// </summary>
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private Func<Vector2, Vector2> positionAdjuster;
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/// <summary>
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/// 处理成功放置逻辑的函数
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/// </summary>
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private Action<Vector2> placementHandler;
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/// <summary>
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/// 处理拖拽过程中检测的函数
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/// </summary>
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private Action<Vector2> dragUpdateHandler;
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/// <summary>
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/// 拖拽按下事件处理器
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/// </summary>
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private Action onPointDownHandler;
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/// <summary>
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/// 拖拽松开事件处理器
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/// </summary>
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private Action onPointUpHandler;
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/// <summary>
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/// 是否启用拖拽功能
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/// </summary>
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private bool isDraggableEnabled = true;
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private void Awake()
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{
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rectTransform = GetComponent<RectTransform>();
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if (buttonUpDrag == null)
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{
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Debug.LogError("DirectDragHandler需要ButtonUpDrag组件!");
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return;
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}
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// 注册长按事件
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buttonUpDrag.AddLongPress(OnStartDrag);
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buttonUpDrag.AddPointerDown(OnPointDown);
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buttonUpDrag.AddPointerUp(OnPointUp);
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}
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public void Init(Func<Vector2, bool> checkValidFunction, Action onStartDrag, Action onEndDrag)
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{
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this.checkValidFunction = checkValidFunction;
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this.onStartDrag = onStartDrag;
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this.onEndDrag = onEndDrag;
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// 查找父级ScrollRect
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parentScrollRect = GetComponentInParent<ScrollRect>();
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}
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/// <summary>
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/// 设置位置调整处理器
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/// </summary>
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/// <param name="positionAdjuster">接收原始位置并返回调整后位置的函数</param>
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public void SetPositionAdjuster(Func<Vector2, Vector2> positionAdjuster)
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{
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this.positionAdjuster = positionAdjuster;
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}
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/// <summary>
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/// 设置成功放置处理器
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/// </summary>
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/// <param name="placementHandler">处理成功放置逻辑的函数</param>
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public void SetPlacementHandler(Action<Vector2> placementHandler)
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{
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this.placementHandler = placementHandler;
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}
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/// <summary>
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/// 设置拖拽过程中的位置检测处理器
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/// </summary>
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/// <param name="dragUpdateHandler">在拖拽过程中处理位置检测的函数</param>
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public void SetDragUpdateHandler(Action<Vector2> dragUpdateHandler)
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{
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this.dragUpdateHandler = dragUpdateHandler;
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}
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public void SetPointDownHandler(Action pointDownCallback, Action pointUpCallback)
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{
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this.onPointDownHandler = pointDownCallback;
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this.onPointUpHandler = pointUpCallback;
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}
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/// <summary>
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/// 启用或禁用拖拽功能
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/// </summary>
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public void SetDraggable(bool draggable)
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{
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this.isDraggableEnabled = draggable;
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}
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private void OnPointDown()
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{
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onPointDownHandler?.Invoke();
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}
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private void OnPointUp()
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{
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onPointUpHandler?.Invoke();
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}
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private void OnStartDrag()
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{
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if (!isDraggableEnabled)
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return;
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// 开始拖拽
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isDragging = true;
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scaleFactor = UIRoot.Instance.RootCanvas.GetComponent<RectTransform>().sizeDelta.x / Screen.width;
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// 如果在ScrollRect中，则暂时禁用它
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if (parentScrollRect != null)
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{
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parentScrollRect.enabled = false;
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}
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originalPosition = rectTransform.position;
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originalScale = rectTransform.localScale;
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// 改变外观（如果启用）
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if (changeDragAppearance)
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{
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rectTransform.localScale = dragScale;
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}
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// 注册移动和结束拖拽事件
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InputManager.Instance.OnFingerMoveUI += UpdateDragPosition;
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InputManager.Instance.OnFingerUpUI += EndDrag;
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onStartDrag?.Invoke();
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}
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private void UpdateDragPosition(Vector2 delta)
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{
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if (!isDragging || !isDraggableEnabled)
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return;
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// 计算新位置（考虑偏移）
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Vector2 newPosition = rectTransform.anchoredPosition + delta * scaleFactor;
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// 应用方向锁定和边界限制逻辑...
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// 使用自定义位置调整器（如果有）
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if (positionAdjuster != null)
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{
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newPosition = positionAdjuster(newPosition);
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}
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// 更新位置
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rectTransform.anchoredPosition = newPosition;
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// 调用拖拽更新处理器
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dragUpdateHandler?.Invoke(rectTransform.position);
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}
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private void EndDrag(Vector2 position)
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{
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if (!isDragging)
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return;
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isDragging = false;
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// 恢复原始外观
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if (changeDragAppearance)
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{
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rectTransform.localScale = originalScale;
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}
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// 处理拖拽结束逻辑
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HandleDragEnd(rectTransform.position);//position
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// 重新启用ScrollRect
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if (parentScrollRect != null)
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{
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parentScrollRect.enabled = true;
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}
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// 清理事件监听
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InputManager.Instance.OnFingerMoveUI -= UpdateDragPosition;
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InputManager.Instance.OnFingerUpUI -= EndDrag;
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onEndDrag?.Invoke();
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}
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private void HandleDragEnd(Vector2 position)
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{
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// 在这里实现放置逻辑
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bool validPlacement = CheckValidPlacement(position);
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if (validPlacement)
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{
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// 有效放置，执行相应逻辑
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FinalizeItemPlacement(position);
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}
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}
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private bool CheckValidPlacement(Vector2 position)
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{
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// 实现放置检测逻辑
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// 这里只是示例，你需要根据具体需求实现
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// 示例：使用射线检测
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//var results = new System.Collections.Generic.List<UnityEngine.EventSystems.RaycastResult>();
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//var eventData = new UnityEngine.EventSystems.PointerEventData(UnityEngine.EventSystems.EventSystem.current);
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//eventData.position = position;
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//UnityEngine.EventSystems.EventSystem.current.RaycastAll(eventData, results);
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//
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//foreach (var result in results)
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//{
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// // 检查是否是有效的放置目标
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// // 例如：检查是否有特定的组件或标签
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// if (result.gameObject.CompareTag("DropZone"))
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// {
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// return true;
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// }
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//}
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//
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// 默认返回true，允许在任何位置放置
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// 如果需要更严格的控制，改为return false;
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//return true;
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if (checkValidFunction != null)
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{
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return checkValidFunction(position);
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}
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return false;
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}
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private void FinalizeItemPlacement(Vector2 position)
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{
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if (placementHandler != null)
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{
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placementHandler(position);
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}
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}
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private void ReturnToOriginalPosition()
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{
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// 返回原始位置
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// 可以使用动画或直接设置
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// 直接设置:
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// rectTransform.position = originalPosition;
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// 使用动画效果:
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//StartCoroutine(AnimateReturn());
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rectTransform.position = originalPosition;
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}
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private System.Collections.IEnumerator AnimateReturn()
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{
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float duration = 0.3f;
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float elapsed = 0f;
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Vector3 startPos = rectTransform.position;
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while (elapsed < duration)
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{
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rectTransform.position = Vector3.Lerp(startPos, originalPosition, elapsed / duration);
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elapsed += Time.deltaTime;
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yield return null;
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}
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rectTransform.position = originalPosition;
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}
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private void OnDestroy()
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{
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// 清理事件监听
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if (InputManager.Instance != null)
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{
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InputManager.Instance.OnFingerMoveUI -= UpdateDragPosition;
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InputManager.Instance.OnFingerUp -= EndDrag;
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InputManager.Instance.OnFingerUpUI -= EndDrag;
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}
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}
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// 可选：提供公共方法以在外部重置位置
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public void ResetPosition()
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{
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rectTransform.position = originalPosition;
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}
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// 可选：提供公共方法以更新原始位置（例如在布局变化后）
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public void UpdateOriginalPosition()
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{
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originalPosition = rectTransform.position;
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}
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} |