72 lines
2.3 KiB
C#
72 lines
2.3 KiB
C#
|
||
using System.Collections;
|
||
using System.Collections.Generic;
|
||
using UnityEngine;
|
||
using UnityEngine.UI;
|
||
using UnityEngine.EventSystems;
|
||
public class DragWindow : MonoBehaviour, IDragHandler, IBeginDragHandler, IEndDragHandler, IPointerClickHandler
|
||
{
|
||
Vector3 offest;
|
||
bool CanDrag = false;
|
||
bool isFirstDrag = true;
|
||
/// <summary>
|
||
/// 是否忽略是否在UI上保持可拖动？
|
||
/// </summary>
|
||
[Header("是否忽略是否在UI上保持可拖动？")]
|
||
public bool IgnoretheUI = false;
|
||
//刚开始拖拽时第一下触发这个函数
|
||
public void OnBeginDrag(PointerEventData eventData)
|
||
{
|
||
if (!IgnoretheUI)
|
||
if (EventSystem.current.IsPointerOverGameObject()) return;
|
||
if (RectTransformUtility.RectangleContainsScreenPoint(transform as RectTransform, Input.mousePosition))
|
||
{
|
||
//1、计算所有需要的数据 image本身的坐标 鼠标所在的位置相对于Canvas的本地坐标
|
||
Vector2 localPos;
|
||
|
||
RectTransformUtility.ScreenPointToLocalPointInRectangle(transform as RectTransform, Input.mousePosition, null, out localPos);
|
||
//2、计算偏移量
|
||
offest = vector2TpVector3(localPos);
|
||
|
||
CanDrag = true;
|
||
}
|
||
}
|
||
|
||
Vector3 vector2TpVector3(Vector2 vector2)
|
||
{
|
||
return new Vector3(vector2.x, vector2.y, 0);
|
||
}
|
||
public void OnDrag(PointerEventData eventData)
|
||
{
|
||
if (!IgnoretheUI)
|
||
if (EventSystem.current.IsPointerOverGameObject()) return;
|
||
if (CanDrag)
|
||
{
|
||
Vector2 localPosition;
|
||
RectTransformUtility.ScreenPointToLocalPointInRectangle(transform.parent as RectTransform, Input.mousePosition, null, out localPosition);
|
||
//transform.localPosition = localPosition;
|
||
// offest = vector2TpVector3(localPosition);
|
||
|
||
transform.localPosition = vector2TpVector3(localPosition) - offest;
|
||
}
|
||
}
|
||
//停止拖拽
|
||
public void OnEndDrag(PointerEventData eventData)
|
||
{
|
||
if (!IgnoretheUI)
|
||
if (EventSystem.current.IsPointerOverGameObject()) return;
|
||
CanDrag = false;
|
||
if (isFirstDrag && transform.Find("tip"))
|
||
{
|
||
transform.Find("tip").gameObject.SetActive(false);
|
||
isFirstDrag = false;
|
||
}
|
||
}
|
||
|
||
public void OnPointerClick(PointerEventData eventData)
|
||
{
|
||
|
||
}
|
||
}
|
||
|