■ 타원을 임의 선으로 채우는 방법을 보여준다.
▶ MainForm.cs
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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> /// 마진 /// </summary> private const int MARGIN = 10; /// <summary> /// 중심 X /// </summary> private int centerX; /// <summary> /// 중심 Y /// </summary> private int centerY; /// <summary> /// 너비 /// </summary> private int width; /// <summary> /// 높이 /// </summary> private int height; /// <summary> /// 포인트 리스트 /// </summary> private List<PointF> pointList = null; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); ResizeRedraw = true; #region 이벤트를 설정한다. Load += Form_Load; Resize += Form_Resize; Paint += Form_Paint; #endregion } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 폼 로드시 처리하기 - Form_Load(sender, e) /// <summary> /// 폼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Load(object sender, EventArgs e) { SetDrawingObject(); } #endregion #region 폼 크기 조정시 처리하기 - Form_Resize(sender, e) /// <summary> /// 폼 크기 조정시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Resize(object sender, EventArgs e) { SetDrawingObject(); } #endregion #region 폼 페인트시 처리하기 - Form_Paint(sender, e) /// <summary> /// 폼 페인트시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Paint(object sender, PaintEventArgs e) { if((this.width <= 0) || (this.height <= 0)) { return; } e.Graphics.SmoothingMode = SmoothingMode.AntiAlias; e.Graphics.FillEllipse(Brushes.LightBlue, MARGIN, MARGIN, this.width, this.height); e.Graphics.DrawEllipse(Pens.Blue, MARGIN, MARGIN, this.width, this.height); e.Graphics.DrawLines(Pens.Blue, this.pointList.ToArray()); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 그리기 객체 설정하기 - SetDrawingObject() /// <summary> /// 그리기 객체 설정하기 /// </summary> private void SetDrawingObject() { this.width = ClientSize.Width - 2 * MARGIN; this.height = ClientSize.Height - 2 * MARGIN; this.centerX = ClientSize.Width / 2; this.centerY = ClientSize.Height / 2; Random random = new Random(); double circumference = 2 * Math.PI * Math.Sqrt((this.width * this.width + this.height * this.height) / 2); int pointCount = (int)(circumference / 40); this.pointList = new List<PointF>(); for(int i = 0; i < pointCount; i++) { double theta1 = 2 * Math.PI * random.NextDouble(); float x1 = (float)(this.centerX + Math.Cos(theta1) * this.width / 2); float y1 = (float)(this.centerY + Math.Sin(theta1) * this.height / 2); this.pointList.Add(new PointF(x1, y1)); double theta2 = 2 * Math.PI * random.NextDouble(); float x2 = (float)(this.centerX + Math.Cos(theta2) * this.width / 2); float y2 = (float)(this.centerY + Math.Sin(theta2) * this.height / 2); this.pointList.Add(new PointF(x2, y2)); } } #endregion } } |
