/*
 * Created by: Mo
 * Created: Friday, July 06, 2007
 */

using System;
using System.Collections.Generic;

namespace DesignPatterns.Observer {
	public class Mo : ISubject {
		#region Constructors

		public Mo( ) : this( new List< IObserver >( ) ) {}

		public Mo( IList< IObserver > concernedRelatives ) {
			_concernedRelatives = concernedRelatives;
			LookAtCuteGirl += delegate { OnLookedAtCuteGirl( ); };
		}

		#endregion

		#region Public Methods

		public event EventHandler LookAtCuteGirl;

		public void Add( IObserver observer ) {
			_concernedRelatives.Add( observer );
		}

		public void Remove( IObserver observer ) {
			_concernedRelatives.Remove( observer );
		}

		#endregion

		#region Private Fields

		private IList< IObserver > _concernedRelatives;

		#endregion

		#region Private Methods

		private void OnLookedAtCuteGirl( ) {
			foreach ( IObserver relative in _concernedRelatives ) {
				relative.Update( );
			}
		}

		#endregion
	}
}