[Solved] Allow overlapping buttons in Unity UI to all process the click event.

I have 2 buttons that overlap a bit. I want that if the overlapping area is clicked, both buttons get triggered. I have no idea where to start.

 

You could create a hidden third button that just covers the part where they overlap so that it could trigger both buttons when it's pushed.

 

That wouldn't work in my case. I did just find a very flexible way to do this:

Code (CSharp):

1. using System.Collections.Generic;
2. using UnityEngine.EventSystems;
3.  
4. namespace MyUI
5. {
6.     public sealed class EventBubbler : MonoBehaviour, IPointerClickHandler, IPointerUpHandler, IPointerDownHandler
7.     {
8.         private void Bubble<T>(PointerEventData eventData, ExecuteEvents.EventFunction<T> eventFunction) where T : IEventSystemHandler
9.         {
10.             var allRaycasted = new List<RaycastResult>();
11.             EventSystem.current.RaycastAll(eventData, allRaycasted);
12.             foreach (var raycasted in allRaycasted)
13.             {
14.                 if (raycasted.gameObject == gameObject)
15.                 {
16.                     continue;
17.                 }
18.                 ExecuteEvents.Execute(raycasted.gameObject, eventData, eventFunction);
19.             }
20.         }
21.  
22.         void IPointerClickHandler.OnPointerClick(PointerEventData eventData)
23.         {
24.             Bubble(eventData, ExecuteEvents.pointerClickHandler);
25.         }
26.  
27.         void IPointerDownHandler.OnPointerDown(PointerEventData eventData)
28.         {
29.             Bubble(eventData, ExecuteEvents.pointerDownHandler);
30.         }
31.  
32.         void IPointerUpHandler.OnPointerUp(PointerEventData eventData)
33.         {
34.             Bubble(eventData, ExecuteEvents.pointerUpHandler);
35.         }
36.     }
37. }

Just place it on the GO you want to allow to bubble events.

 

@supremegrandruler
I was looking for ways to make this possible for several hours..
that script very helpful for me, thanks!