using System;

using System.Collections.Generic;

using Assistance.Drawing;

namespace Assistance {

	public class Modifier: ActivePoint.Owner, InputModifier {

		public static readonly Pen pen = new Pen("Light Gray");

		public Modifier(Document document): base(document) {

			document.modifiers.Add(this);

		}

		public override void remove() {

			base.remove();

			document.modifiers.Remove(this);

		}

		public override void bringToFront() {

			document.modifiers.Remove(this);

			document.modifiers.Add(this);

		}

		public virtual void activate() { }

		public virtual List<track> modify(List<track> tracks) { return tracks; }

		public virtual void deactivate() { }

		public virtual void draw(Cairo.Context context) { }

	}

}