Ramakrishna's Code Project Screen Saver

using System;
using System.Drawing;

namespace CP.Apps.ScreenSaver
{
	public interface IEffectManager
	{
		event EventHandler NoEffect;
		
		Color BackColor
		{
			get;
			set;
		}

		System.Drawing.Rectangle DisplayArea
		{
			get;
		}

		IEffect Effect
		{
			get;
			set;
		}

		void ProgressEffect();
	}
	
	public class EffectCompleteEventArgs : EventArgs
	{
		private IEffectManager effectManager;
		private System.Drawing.Graphics graphics;

		public EffectCompleteEventArgs(IEffectManager mgr, Graphics g)
		{
			this.effectManager = mgr;
			this.graphics = g;
		}

		public IEffectManager EffectManager
		{
			get
			{
				return effectManager;
			}
		}
		
		public System.Drawing.Graphics Graphics
		{
			get
			{
				return this.graphics;
			}
		}
	}
		
	public delegate void EffectCompleteEventHandler(object sender, EffectCompleteEventArgs e);
	
	/// <summary>
	/// Encapsulates an effect that happens on the screen saver like animation etc.
	/// </summary>
	public interface IEffect
	{
		event EffectCompleteEventHandler EffectComplete;
		void Draw(Graphics g);
		bool Progress();
		void End(Graphics g, IEffectManager em);
	}
}