89 lines
2.7 KiB
C#
89 lines
2.7 KiB
C#
// ***********************************************************************
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// Assembly : Unity
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// Author : KimCh
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// Created :
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//
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// Last Modified By : KimCh
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// Last Modified On :
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// ***********************************************************************
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// <copyright file= "KDraggable" company=""></copyright>
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// <summary></summary>
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// ***********************************************************************
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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public class KDraggable : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
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{
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public UnityEngine.Events.UnityEvent onDragEnd = new UnityEngine.Events.UnityEvent();
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[HideInInspector]
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public Transform parentToReturnTo = null;
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[HideInInspector]
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public Transform placeHolderParent = null;
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private GameObject _placeHolder = null;
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private LayoutElement _layoutElement;
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private void Awake()
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{
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_layoutElement = GetComponent<LayoutElement>();
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}
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public void OnBeginDrag(PointerEventData eventData)
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{
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_placeHolder = new GameObject();
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_placeHolder.transform.SetParent(this.transform.parent);
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var le = _placeHolder.AddComponent<LayoutElement>();
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le.preferredWidth = _layoutElement.preferredWidth;
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le.preferredHeight = _layoutElement.preferredHeight;
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_placeHolder.transform.SetSiblingIndex(this.transform.GetSiblingIndex());
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parentToReturnTo = this.transform.parent;
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placeHolderParent = parentToReturnTo;
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_layoutElement.ignoreLayout = true;
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this.transform.SetParent(this.transform.parent.parent);
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this.GetComponent<CanvasGroup>().blocksRaycasts = false;
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (_placeHolder.transform.parent != placeHolderParent)
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{
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_placeHolder.transform.SetParent(placeHolderParent);
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}
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RectTransformUtility.ScreenPointToWorldPointInRectangle(this.transform as RectTransform, eventData.position, eventData.pressEventCamera, out var position);
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this.transform.position = position;
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int newSiblingIndex = placeHolderParent.childCount;
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for (int i = 0; i < placeHolderParent.childCount; i++)
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{
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var child = placeHolderParent.GetChild(i);
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if (child.gameObject.activeSelf && position.x < child.position.x)
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{
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newSiblingIndex = i;
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if (_placeHolder.transform.GetSiblingIndex() < newSiblingIndex)
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newSiblingIndex--;
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break;
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}
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}
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_placeHolder.transform.SetSiblingIndex(newSiblingIndex);
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}
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public void OnEndDrag(PointerEventData eventData)
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{
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_layoutElement.ignoreLayout = false;
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this.transform.SetParent(parentToReturnTo);
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this.GetComponent<CanvasGroup>().blocksRaycasts = true;
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this.transform.SetSiblingIndex(_placeHolder.transform.GetSiblingIndex());
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Destroy(_placeHolder);
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onDragEnd.Invoke();
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}
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}
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