ANTM/Assets/Scripts/Clickable.cs

using UnityEngine;

public class Clickable : MonoBehaviour
{
    public delegate void ClickAction();
    public event ClickAction OnClicked;

    [HideInInspector]
    public bool Interactable = true;
    private bool once;

    virtual public void DoSomething()
    {
		FadeScreen.Instance.active = false; // interrupt update fading if user want to fast change location

		if (OnClicked != null)
        {
            OnClicked();
        }
    }

    private void OnMouseDown()
    {
        if (!once && Interactable)
        {
            DoSomething();

            once = true;
        }
    }

    private void OnMouseUp()
    {
        once = false;
    }
}