Unity3d EventsExtension

EventsExtension.cs

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using System.Linq;
using UnityEngine.UI;

public static class EventsExtension
{
    /// <summary>
    /// 
    /// </summary>
    /// <typeparam name="T">PointerEventData</typeparam>
    /// <param name="gameObject"></param>
    /// <param name="eventType"></param>
    /// <param name="action"></param>
    public static void SetEvent<T>(this GameObject gameObject, EventTriggerType eventType, Action<T> action) where T : BaseEventData
    {
        var trigger = gameObject.GetOrSetAndGetEventTrigger();
        trigger.SetEvent(eventType, action);
    }

    public static void RemoveEvents(this GameObject gameObject, EventTriggerType eventType)
    {
        var trigger = gameObject.GetOrSetAndGetEventTrigger();
        trigger.RemoveEvent(eventType);
    }

    private static EventTrigger GetOrSetAndGetEventTrigger(this GameObject go)
    {
        var component = go.GetComponent<EventTrigger>();
        if (component == null)
        {
            component = go.AddComponent<EventTrigger>();
        }
        return component;
    }

    public static void SetEvent<T>(this EventTrigger trigger, EventTriggerType eventType, Action<T> action) where T : BaseEventData
    {
        EventTrigger.Entry entry = new EventTrigger.Entry();
        entry.eventID = eventType;
        entry.callback.SetListener((eventData) => action((T)eventData));
        trigger.triggers.RemoveAll(x => x.eventID == eventType);
        trigger.triggers.Add(entry);
    }

    public static void RemoveEvent(this EventTrigger trigger, EventTriggerType eventType)
    {
        trigger.triggers.RemoveAll(x => x.eventID == eventType);
    }

    public static void SetListener(this UnityEvent Event, UnityAction action)
    {
        Event.RemoveAllListeners();
        Event.AddListener(action);
    }

    public static void SetListener<T0>(this UnityEvent<T0> Event, UnityAction<T0> action)
    {
        Event.RemoveAllListeners();
        Event.AddListener(action);
    }

    public static void SetListener<T0, T1>(this UnityEvent<T0, T1> Event, UnityAction<T0, T1> action)
    {
        Event.RemoveAllListeners();
        Event.AddListener(action);
    }

    public static void SetListener<T0, T1, T2>(this UnityEvent<T0, T1, T2> Event, UnityAction<T0, T1, T2> action)
    {
        Event.RemoveAllListeners();
        Event.AddListener(action);
    }

    public static void SetListener<T0, T1, T2, T3>(this UnityEvent<T0, T1, T2, T3> Event, UnityAction<T0, T1, T2, T3> action)
    {
        Event.RemoveAllListeners();
        Event.AddListener(action);
    }
}