Overlay input-blocking facility for Unity3D (input / click blocker / inhibitor)

OverlayBlocker.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

// @kurtdekker
//
// Purpose:
//	- to inhibit processing of input whenever a popup is enabled
//
// To use:
//	- place one of these somewhere in any and all popup windows you make
//
//	- in code, query OverlayBlocker.ShouldAllowInput to decide if you need to process clicks
//

public class OverlayBlocker : MonoBehaviour
{
	public static bool ShouldAllowInput
	{
		get
		{
			return counter == 0;
		}
	}

	static int counter;

	void OnEnable()
	{
		counter++;
	}
	void OnDisable()
	{
		counter--;
	}
}