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Question by CodeAA · Sep 24, 2019 at 02:51 PM · unity 5collisionuiplayerunity 2d

How do i prevent the player from dragging a ui element off screen?

here is the code.

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.EventSystems;
 
 namespace QInventory
 {
     [AddComponentMenu("Q Inventory/Q UI Drag")]
     public class Q_UIDrag : MonoBehaviour, IBeginDragHandler, IDragHandler
     {
         private Vector2 offset;
 
         public void OnBeginDrag(PointerEventData eventData)
         {
             offset = eventData.position - (Vector2)transform.position;
             transform.position = eventData.position - offset;
         }
 
         public void OnDrag(PointerEventData eventData)
         {
             transform.position = eventData.position - offset;
         }
     }
 }

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Answer by tormentoarmagedoom · Oct 05, 2019 at 06:11 PM

Hello there.

You can always knwo the position of the mouse on the screen with

https://docs.unity3d.com/ScriptReference/Input-mousePosition.html

So you block the drag if mouse reach the border or something like this.

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avatar image CodeAA · Oct 05, 2019 at 08:14 PM 0
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Hi, ty for taking ur time to comment on this. i did try to fix it with the mouse position but couldnt find a way to make some sort of border to block it. btw eventData.position is same as mouse pos since i use it to make the inventory follow it.

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