ICODEBROKER

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Windows.Forms;

namespace TestProject

{

    /// <summary>

    /// 메인 폼

    /// </summary>

    public partial class MainForm : Form

    {

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>

        /// 시작 포인트 리스트

        /// </summary>

        private List<Point> startPointList = new List<Point>();

        /// <summary>

        /// 종료 포인트 리스트

        /// </summary>

        private List<Point> endPointList = new List<Point>();

        /// <summary>

        /// 그리기 여부

        /// </summary>

        private bool isDrawing = false;

        /// <summary>

        /// 신규 시작 포인트

        /// </summary>

        private Point newStartPoint;

        /// <summary>

        /// 신규 종료 포인트

        /// </summary>

        private Point newEndPoint;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>

        /// 생성자

        /// </summary>

        public MainForm()

        {

            InitializeComponent();

            this.useCutCheckBox.CheckedChanged += useCutCheckBox_CheckedChanged;

            this.pictureBox.MouseDown          += pictureBox_MouseDown;

            this.pictureBox.MouseMove          += pictureBox_MouseMove;

            this.pictureBox.MouseUp            += pictureBox_MouseUp;

            this.pictureBox.Paint              += pictureBox_Paint;

        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        //////////////////////////////////////////////////////////////////////////////// Event

        #region 잘라내기 사용 체크 박스 체크 변경시 처리하기 - useCutCheckBox_CheckedChanged(sender, e)

        /// <summary>

        /// 잘라내기 사용 체크 박스 체크 변경시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void useCutCheckBox_CheckedChanged(object sender, EventArgs e)

        {

            this.pictureBox.Refresh();

        }

        #endregion

        #region 픽처 박스 마우스 DOWN 처리하기 - pictureBox_MouseDown(sender, e)

        /// <summary>

        /// 픽처 박스 마우스 DOWN 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void pictureBox_MouseDown(object sender, MouseEventArgs e)

        {

            this.isDrawing = true;

            this.newStartPoint = e.Location;

            this.newEndPoint   = e.Location;

        }

        #endregion

        #region 픽처 박스 마우스 이동시 처리하기 - pictureBox_MouseMove(sender, e)

        /// <summary>

        /// 픽처 박스 마우스 이동시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void pictureBox_MouseMove(object sender, MouseEventArgs e)

        {

            if(!this.isDrawing)

            {

                return;

            }

            this.newEndPoint = e.Location;

            this.pictureBox.Refresh();

        }

        #endregion

        #region 픽처 박스 마우스 UP 처리하기 - pictureBox_MouseUp(sender, e)

        /// <summary>

        /// 픽처 박스 마우스 UP 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void pictureBox_MouseUp(object sender, MouseEventArgs e)

        {

            this.isDrawing = false;

            if(this.newStartPoint == this.newEndPoint)

            {

                return;

            }

            this.startPointList.Add(this.newStartPoint);

            this.endPointList.Add(this.newEndPoint);

            this.pictureBox.Refresh();

        }

        #endregion

        #region 픽처 박스 페인트시 처리하기 - pictureBox_Paint(sender, e)

        /// <summary>

        /// 픽처 박스 페인트시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void pictureBox_Paint(object sender, PaintEventArgs e)

        {

            e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;

            Pen backgroundPen = null;

            if(this.useCutCheckBox.Checked)

            {

                backgroundPen = new Pen(pictureBox.BackColor, 8);

            }

            using(Pen foregroundPen = new Pen(Color.Blue, 4))

            {

                for(int i = 0; i < this.startPointList.Count; i++)

                {

                    DrawLine

                    (

                        e.Graphics,

                        backgroundPen,

                        foregroundPen,

                        this.startPointList[i],

                        this.endPointList[i]

                    );

                }

                if(this.isDrawing)

                {

                    foregroundPen.Color = Color.Red;

                    DrawLine

                    (

                        e.Graphics,

                        backgroundPen,

                        foregroundPen,

                        this.newStartPoint,

                        this.newEndPoint

                    );

                }

            }

            if(backgroundPen != null)

            {

                backgroundPen.Dispose();

            }

        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 선 그리기 - DrawLine(graphics, backgroundPen, foregroundPen, startPoint, endPoint)

        /// <summary>

        /// 선 그리기

        /// </summary>

        /// <param name="graphics">그래픽스</param>

        /// <param name="backgroundPen">배경 펜</param>

        /// <param name="foregroundPen">전경 펜</param>

        /// <param name="startPoint">시작 포인트</param>

        /// <param name="endPoint">종료 포인트</param>

        private void DrawLine(Graphics graphics, Pen backgroundPen, Pen foregroundPen, Point startPoint, Point endPoint)

        {

            if(backgroundPen != null)

            {

                graphics.DrawLine(backgroundPen, startPoint, endPoint);

            }

            graphics.DrawLine(foregroundPen, startPoint, endPoint);

        }

        #endregion

    }

}