MARKUS

using System.Windows.Input;

    public interface ICommentUserInfo

    {

        void OnCreatingMouseMove(Point pt, bool bAxisLocked, bool bShiftKeyPressed);

    }

    public class CommentUserInfo : System.Windows.Controls.Control, ICommentUserInfo

        public virtual void OnCreatingMouseMove(Point pt, bool bAxisLocked, bool bShiftKeyPressed) { }

        /// <summary>

        /// 정원, 정사각형, 정삼각형을 그리기 위한 EndPoint계산

        /// </summary>

        /// <param name="StartP">StartPoint</param>

        /// <param name="EndP">EndPoint</param>

        /// <returns>Return_EndPoint</returns>

        public Point GetSquareEndPoint(Point StartP, Point EndP)

        {

            Point? res = null;

            double dx = EndP.X - StartP.X;

            double dy = EndP.Y - StartP.Y;

            double length;

            switch (this.ControlType)

            {

                case ControlType.Triangle:

                    {

                        //삼각형의 StartPoint기준으로 반지름 만큼 증가하기 때문에 곱하기2 필요

                        length = Math.Max(Math.Abs(dx) * 2, Math.Abs(dy));

                        res = (dy < 0) ? new Point(StartP.X + length / 2, StartP.Y - length) : new Point(StartP.X + length / 2, StartP.Y + length);

                    }

                    break;

                default:

                    {

                        length = Math.Max(Math.Abs(dx), Math.Abs(dy));

                        res = new Point((dx > 0) ? StartP.X + length : StartP.X - length, (dy > 0) ? StartP.Y + length : StartP.Y - length);

                    }

                    break;

            }

            return res.Value;

        }