■ PictureBox 클래스를 사용해 사용자 선을 그리는 방법을 보여준다.
▶ Segment.cs
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using System.Drawing; namespace TestProject { /// <summary> /// 세그먼트 /// </summary> public class Segment { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Public #region Field /// <summary> /// 펜 /// </summary> public Pen Pen; /// <summary> /// 시작점 /// </summary> public Point Point1; /// <summary> /// 종료점 /// </summary> public Point Point2; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - Segment(pen, point1, point2) /// <summary> /// 생성자 /// </summary> /// <param name="pen">펜</param> /// <param name="point1">시작점</param> /// <param name="point2">종료점</param> public Segment(Pen pen, Point point1, Point point2) { Pen = pen; Point1 = point1; Point2 = point2; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 그리기 - Draw(graphics) /// <summary> /// 그리기 /// </summary> /// <param name="graphics">그래픽스</param> public void Draw(Graphics graphics) { graphics.DrawLine(Pen, Point1, Point2); } #endregion } } |
▶ MainForm.cs
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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> /// 세그먼트 리스트 /// </summary> private List<Segment> segmentList = new List<Segment>(); /// <summary> /// 신규 세그먼트 /// </summary> private Segment newSegment = null; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); this.canvasPictureBox.Paint += canvasPictureBox_Paint; this.canvasPictureBox.MouseDown += canvasPictureBox_MouseDown; this.canvasPictureBox.MouseMove += canvasPictureBox_MouseMove; this.canvasPictureBox.MouseUp += canvasPictureBox_MouseUp; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 캔버스 픽처 박스 페인트시 처리하기 - canvasPictureBox_Paint(sender, e) /// <summary> /// 캔버스 픽처 박스 페인트시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void canvasPictureBox_Paint(object sender, PaintEventArgs e) { e.Graphics.Clear(this.canvasPictureBox.BackColor); e.Graphics.SmoothingMode = SmoothingMode.AntiAlias; foreach(Segment segment in this.segmentList) { segment.Draw(e.Graphics); } if(this.newSegment != null) { this.newSegment.Draw(e.Graphics); } } #endregion #region 캔버스 픽처 박스 마우스 DOWN 처리하기 - canvasPictureBox_MouseDown(sender, e) /// <summary> /// 캔버스 픽처 박스 마우스 DOWN 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void canvasPictureBox_MouseDown(object sender, MouseEventArgs e) { this.newSegment = new Segment(Pens.Blue, e.Location, e.Location); this.canvasPictureBox.Refresh(); } #endregion #region 캔버스 픽처 박스 마우스 이동시 처리하기 - canvasPictureBox_MouseMove(sender, e) /// <summary> /// 캔버스 픽처 박스 마우스 이동시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void canvasPictureBox_MouseMove(object sender, MouseEventArgs e) { if(this.newSegment == null) { return; } this.newSegment.Point2 = e.Location; this.canvasPictureBox.Refresh(); } #endregion #region 캔버스 픽처 박스 마우스 UP 처리하기 - canvasPictureBox_MouseUp(sender, e) /// <summary> /// 캔버스 픽처 박스 마우스 UP 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void canvasPictureBox_MouseUp(object sender, MouseEventArgs e) { if(this.newSegment == null) { return; } this.newSegment.Pen = Pens.Black; this.segmentList.Add(newSegment); this.newSegment = null; this.canvasPictureBox.Refresh(); } #endregion } } |
