using System;

using System.Drawing;

using System.Drawing.Imaging;

using System.Collections.Generic;

namespace Assistance {

	public class Assistant {

		public static readonly double maxLen = 1000.0;

		public static readonly int gridPointsCount = 100;

		public static readonly Pen pen = Pens.Gray;

		public readonly Workarea canvas;

		public readonly List<activepoint> points = new List<activepoint>();</activepoint></activepoint>

		public Assistant(Workarea canvas) {

			this.canvas = canvas;

			canvas.assistants.Add(this);

		}

		public void remove() {

			foreach(ActivePoint point in points)

				canvas.points.Remove(point);

			canvas.assistants.Remove(this);

		}

		public void bringToFront() {

			canvas.assistants.Remove(this);

			canvas.assistants.Add(this);

		}

		public double getMaxLen() {

			double l = 0.0;

			foreach(ActivePoint point in points)

				l = Math.Max(l, point.position.len());

			return maxLen + l;

		}

		public virtual void onMovePoint(ActivePoint point, Point position) {

			point.position = position;

		}

		public virtual void draw(Graphics g) { }

		public virtual void getGuidelines(List<guideline> outGuidelines, Point target) { }</guideline>

	}

}