OnMouseDown work through UI elements

Question

There are 1 gameobject with onmousedown function and UI Button at my scene . When gameobject goes behind button and i need to click this button, function onmousedown of gameobject working too. How to avoid this unwanted action ? I tried to attach collider to button, but function of gameobject still works.

Answer 1

Best Answer

Answer by OnikurYH · Jan 22, 2016 at 02:00 AM

Hi, You can make a new script to check is the player hovering the UI Elements

For example (C#):

MyUIHoverListener.cs

Assume that the script is put into the Canvas game object

 using UnityEngine;
 using UnityEngine.EventSystems;
 using System.Collections;
 
 public class MyUIHoverListener : MonoBehaviour
 {
     public bool isUIOverride { get; private set; }
 
     void Update()
     {
         // It will turn true if hovering any UI Elements
         isUIOverride = EventSystem.current.IsPointerOverGameObject ();
     }
 }

MyGameObjectOnClick.cs

This script is attach to your game object it will behind the UI Elements

 using UnityEngine;
 using UnityEngine.UI;
 using System.Collections;
 
 public class MyGameObjectOnClick : MonoBehaviour
 {
     private MyUIHoverListener uiListener;
 
     void Start()
     {
         uiListener = GameObject.Find ("Canvas").GetComponent<MyUIHoverListener> ();
     }
 
     void OnMouseDown ()
     {
         if (uiListener.isUIOverride)
         {
             Debug.Log ("Cancelled OnMouseDown! A UI element has override this object!");
         }
         else
         {
             Debug.Log ("Object OnMouseDown");
         }
     }
 }

Hope this can help you =)

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AlexMarchen · Jan 22, 2016 at 09:29 AM 1

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Thank you so much!

Max-Boet · Sep 28, 2020 at 12:47 PM 0

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This answer saved my life, I couldn't understand why when a canvas is raycast blocking a collider, why does it still call On$$anonymous$$ouseOver() event, but this fixes it, so..., cool!

Answer 2

Answer by i2winners · Jan 10, 2021 at 01:20 AM

hey, I have added something extra to your code , for if you open a UI after clicking the object (like a menu) and it clicks true the UI onto other objects that are under a button

`private void OnMouseDown()
    {
        if (!GameManager.instance.ObjectClickBlocker)
        {
            if (uiListener.IsUIOverride)
            {
                Debug.Log("Cancelled OnMouseDown! A UI element has override this object!");
            }
            else
            {
                Debug.Log("Object OnMouseDown");
                ToggleBuildingMenu();
            }
        }
    }
    public void ToggleBuildingMenu()
    {
        BuildingMenu.SetActive(!BuildingMenu.activeSelf);
        GameManager.instance.ObjectClickBlocker = BuildingMenu.activeSelf; // sets same as menu, so if menu active blocker is active 
    }`

and n the GameManager add a public bool

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Answer 3

Answer by d2clon · Feb 24, 2021 at 05:05 PM

This is the only thing that worked for me:

 if(!EventSystem.current.IsPointerOverGameObject())
 {
   // my code 
 }

Jason explains it here: https://www.youtube.com/watch?v=rATAnkClkWU&ab_channel=JasonWeimann

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OnMouseDown work through UI elements

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