■ 레이블을 갖는 히스토그램을 그리는 방법을 보여준다.
▶ MainForm.cs
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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> /// 최소 값 /// </summary> private const int MIN_VALUE = 0; /// <summary> /// 최대 값 /// </summary> private const int MAX_VALUE = 100; /// <summary> /// 값 배열 /// </summary> private float[] valueArray = new float[10]; /// <summary> /// 레이블 배열 /// </summary> private Label[] labelArray = new Label[10]; #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.Resize += canvasPictureBox_Resize; #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) { Random random = new Random(); for(int i = 0; i < this.valueArray.Length; i++) { this.valueArray[i] = random.Next(MIN_VALUE + 5, MAX_VALUE - 5); this.labelArray[i] = new Label(); this.labelArray[i].Parent = this.canvasPictureBox; this.labelArray[i].Text = this.valueArray[i].ToString(); this.labelArray[i].ForeColor = Color.Black; this.labelArray[i].BackColor = Color.Transparent; this.labelArray[i].AutoSize = true; } } #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) { DrawHistogram ( e.Graphics, this.canvasPictureBox.BackColor, this.valueArray, this.canvasPictureBox.ClientSize.Width, this.canvasPictureBox.ClientSize.Height ); } #endregion #region 캔버스 픽처 박스 크기 조정시 처리하기 - canvasPictureBox_Resize(sender, e) /// <summary> /// 캔버스 픽처 박스 크기 조정시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void canvasPictureBox_Resize(object sender, EventArgs e) { this.canvasPictureBox.Refresh(); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 히스토그램 그리기 - DrawHistogram(graphics, backgroundColor, valueArray, width, height) /// <summary> /// 히스토그램 그리기 /// </summary> /// <param name="graphics">그래픽스</param> /// <param name="backgroundColor">배경색</param> /// <param name="valueArray">값 배열</param> /// <param name="width">너비</param> /// <param name="height">높이</param> private void DrawHistogram(Graphics graphics, Color backgroundColor, float[] valueArray, int width, int height) { Color[] colorArray = new Color[] { Color.Red, Color.LightGreen, Color.Blue, Color.Pink, Color.Green, Color.LightBlue, Color.Orange, Color.Yellow, Color.Purple }; graphics.Clear(backgroundColor); RectangleF dataBoundRectangle = new RectangleF(0, 0, valueArray.Length, MAX_VALUE); PointF[] pointArray = { new PointF(0, height), new PointF(width, height), new PointF(0, 0) }; Matrix transformMatrix = new Matrix(dataBoundRectangle, pointArray); graphics.Transform = transformMatrix; using(Pen pen = new Pen(Color.Black, 0)) { for(int i = 0; i < valueArray.Length; i++) { RectangleF valueRectangle = new RectangleF(i, 0, 1, valueArray[i]); using(Brush brush = new SolidBrush(colorArray[i % colorArray.Length])) { graphics.FillRectangle(brush, valueRectangle); graphics.DrawRectangle ( pen, valueRectangle.X, valueRectangle.Y, valueRectangle.Width, valueRectangle.Height ); } PointF[] valuePointArray = { new PointF ( valueRectangle.Left + valueRectangle.Width / 2f, valueRectangle.Bottom ) }; transformMatrix.TransformPoints(valuePointArray); this.labelArray[i].Location = new Point ( (int)valuePointArray[0].X - this.labelArray[i].Width / 2, (int)valuePointArray[0].Y - this.labelArray[i].Height ); } } graphics.ResetTransform(); graphics.DrawRectangle(Pens.Black, 0, 0, width - 1, height - 1); } #endregion } } |
