[C#/WINFORM] 마우스 아래 파이 슬라이스 구하기
■ 마우스 아래의 파이 슬라이스를 구하는 방법을 보여준다. ▶ MainForm.cs
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 |
using System; 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> /// 타원 사각형 /// </summary> private Rectangle ellipseRectangle; /// <summary> /// 중심 포인트 /// </summary> private Point centerPoint; /// <summary> /// X축 반지름 /// </summary> private float radiusX; /// <summary> /// Y축 반지름 /// </summary> private float radiusY; /// <summary> /// 각도 배열 /// </summary> private float[] angleArray = { 0, 45, 80, 110, 130, 170, 220, 245, 300, 360 }; /// <summary> /// 브러시 배열 /// </summary> private Brush[] brushArray = { Brushes.Red, Brushes.LightGreen, Brushes.LightBlue, Brushes.Yellow, Brushes.Orange, Brushes.White, Brushes.Cyan, Brushes.Pink, Brushes.Black, }; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); #region 이벤트를 설정한다. Load += Form_Load; this.canvasPictureBox.Paint += canvasPictureBox_Paint; this.canvasPictureBox.MouseMove += canvasPictureBox_MouseMove; #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) { const int MARGIN = 10; int width = this.canvasPictureBox.ClientSize.Width - 2 * MARGIN; int height = this.canvasPictureBox.ClientSize.Height - 2 * MARGIN; this.ellipseRectangle = new Rectangle(MARGIN, MARGIN, width, height); this.centerPoint = new Point ( this.canvasPictureBox.ClientSize.Width / 2, this.canvasPictureBox.ClientSize.Height / 2 ); this.radiusX = width / 2; this.radiusY = height / 2; } #endregion #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.SmoothingMode = SmoothingMode.AntiAlias; e.Graphics.FillEllipse(Brushes.Blue, this.ellipseRectangle); for(int i = 1; i < this.angleArray.Length; i++) { e.Graphics.FillPie ( this.brushArray[i - 1], this.ellipseRectangle, this.angleArray[i], this.angleArray[i - 1] - this.angleArray[i] ); } e.Graphics.DrawEllipse(Pens.Blue, this.ellipseRectangle); } #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) { int sliceNumber = GetSliceNumber(this.ellipseRectangle, this.angleArray, e.Location); if(sliceNumber == -1) { this.sliceNumberLabel.Text = string.Empty; } else { this.sliceNumberLabel.Text = sliceNumber.ToString(); } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 슬라이스 번호 구하기 - GetSliceNumber(ellipseRectangle, angleArray, point) /// <summary> /// 슬라이스 번호 구하기 /// </summary> /// <param name="ellipseRectangle">타원 사각형</param> /// <param name="angleArray">각도 배열</param> /// <param name="point">포인트</param> /// <returns>슬라이스 번호</returns> private int GetSliceNumber(Rectangle ellipseRectangle, float[] angleArray, Point point) { float radiusX = ellipseRectangle.Width / 2; float radiusY = ellipseRectangle.Height / 2; float centerX = ellipseRectangle.X + radiusX; float centerY = ellipseRectangle.Y + radiusY; float deltaX = point.X - centerX; float deltaY = point.Y - centerY; float value = deltaX * deltaX / radiusX / radiusX + deltaY * deltaY / radiusY / radiusY; if(value < 0.0001) { return -1; } if(value > 1) { return -1; } double angle = Math.Atan2(deltaY, deltaX); if(angle < 0) { angle += 2 * Math.PI; } angle = angle * 180 / Math.PI; for(int i = 0; i < this.angleArray.Length - 1; i++) { if(angle <= this.angleArray[i + 1]) { return i; } } throw new Exception("각도를 찾을 수 없습니다 : " + angle); } #endregion } } |
TestProject.zip