EventManager

using System;
using System.Collections.Generic;

public class EventManager{

	static Dictionary<string,Action> evtHandler = new Dictionary<string, Action>();

	//keyだけを登録->(key,null)
	//keyに対応したActionを登録->(key,Action)
	public static void AddEvent(string key,Action action){
		if (evtHandler.ContainsKey(key))
			evtHandler [key] += action;
		else
			evtHandler.Add (key, action);
	}

	public static void RemoveEvent(string key,Action action){
		if (evtHandler.ContainsKey(key))
			evtHandler [key] -= action;
	}

	public static void InvokeEvent(string key){
		if(evtHandler.ContainsKey(key) && evtHandler[key] != null)
			evtHandler [key] ();
	}
}