Code Bucket …

using System.Collections.Generic;
using Incah.Core.Geo;
using Incah.Core.Input;
using Microsoft.Xna.Framework;

namespace Incah.Core.UI
{
	public interface IComponent
	{
		#region Mouse Events

		event EventHandler<IComponent, Position> MouseEnter;
		event EventHandler<IComponent, Position> MouseExit;
		event EventHandler<IComponent, Position, Position> MouseMove;
		event EventHandler<IComponent, Position> MouseDown;
		event EventHandler<IComponent, Position> MouseUp;
		event EventHandler<IComponent, Position> MouseClick;
		event EventHandler<IComponent, Position> MouseHold;

		#endregion

		UIManager Manager { get; }

		void Update(GameTime time, InputManager input);


		#region Heirarchy Management

		IComponent Parent { get; set; }

		IEnumerable<IComponent> Children(ComponentOrder order);

		void AddChild(IComponent child);

		void RemoveChild(IComponent child);

		int SetOrder(IComponent child, int order);

		int GetOrder(IComponent child);

		bool IsRoot { get; }

		bool IsLeaf { get; }

		#endregion


		#region Geometry

		Position Position { get; set; }

		Position ScreenPosition { get; }

		Size OuterSize { get; set; }

		Size InnerSize { get; }

		Margin Padding { get; set; }

		Area OuterArea { get; }

		Area InnerArea { get; }

		Area ScreenOuterArea { get; }

		Area ScreenInnerArea { get; }

		#endregion


		#region Rendering

		Area ClippingArea { get; }

		bool IsVisible { get; set; }

		float Opacity { get; set; }

		float ScreenOpacity { get; }

		bool DrawingRequired { get; }

		void Draw();

		#endregion

	}
}