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74 lines
3.0 KiB
74 lines
3.0 KiB
4 years ago
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using System;
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using AX.InputSystem;
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using UnityEngine;
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using UnityEngine.EventSystems;
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/// <summary>
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/// UI拖拽脚本，想拖拽谁就挂在谁身上。必须保证该UI有Raycast Target组件，并使其保持开启状态。
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/// </summary>
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[RequireComponent(typeof(CreateStaticObjID))]
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[RequireComponent(typeof(BaseGameObjInfo))]
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public class OnDragPanel : MonoBehaviour, IDragHandler, IBeginDragHandler, IEndDragHandler
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{
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private RectTransform canvasRect;
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private RectTransform transRect;
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private Vector2 localPos;
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private Vector2 offSet;
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public bool limit;
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private Vector2 anchoredPosition;
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private void Start()
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{
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canvasRect = GameObject.Find("Canvas").GetComponent<RectTransform>();
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transRect = GetComponent<RectTransform>();
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offSet = localPos = Vector3.zero;
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anchoredPosition = transRect.anchoredPosition;
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}
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public void OnBeginDrag(PointerEventData eventData)
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{
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if (eventData.button != PointerEventData.InputButton.Left) return;//不是左键按下就不能拖拽
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if (RectTransformUtility.ScreenPointToLocalPointInRectangle(canvasRect, eventData.position, canvasRect.GetComponent<Canvas>().worldCamera, out localPos))
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{
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offSet = localPos - new Vector2(transRect.localPosition.x, transRect.localPosition.y);
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InputManager.isDargUI = true;
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//transform.SetAsLastSibling();
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}
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (eventData.button != PointerEventData.InputButton.Left) return;//不是左键按下就不能拖拽
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if (RectTransformUtility.ScreenPointToLocalPointInRectangle(canvasRect, eventData.position, canvasRect.GetComponent<Canvas>().worldCamera, out localPos))
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{
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transRect.localPosition = localPos - offSet;
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}
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}
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public void OnEndDrag(PointerEventData eventData)
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{
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if (eventData.button != PointerEventData.InputButton.Left) return;//不是左键按下就不能拖拽
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InputManager.isDargUI = false;
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if (limit)
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{
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//if (OutLimit())
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//{
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//transRect.anchoredPosition = anchoredPosition;
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// }
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OutLimit();
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}
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}
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void OutLimit()
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{
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Vector3 pos = transRect.localPosition;
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Vector3 minPosition = transform.parent.GetComponent<RectTransform>().rect.min - transRect.rect.min;
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Vector3 maxPosition = transform.parent.GetComponent<RectTransform>().rect.max - transRect.rect.max;
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pos.x = Mathf.Clamp(transRect.localPosition.x, minPosition.x - transRect.rect.width + 50f, maxPosition.x + transRect.rect.width - 50f);
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pos.y = Mathf.Clamp(transRect.localPosition.y, minPosition.y - transRect.rect.height + 50f, maxPosition.y + transRect.rect.height - 50f);
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transRect.localPosition = pos;
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}
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}
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