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■ 곡선 방향의 텍스트 그리기

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TestProject.zip


MainForm.cs

 

 

using System;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Drawing.Text;

using System.Windows.Forms;

 

namespace TestProject

{

    /// <summary>

    /// 메인 폼

    /// </summary>

    public partial class MainForm : Form

    {

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

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

 

        #region 생성자 - MainForm()

 

        /// <summary>

        /// 생성자

        /// </summary>

        public MainForm()

        {

            InitializeComponent();

 

            #region 이벤트를 설정한다.

 

            Paint += Form_Paint;

 

            #endregion

        }

 

        #endregion

 

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

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

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

 

        #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)

        {

            e.Graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;

            e.Graphics.SmoothingMode     = SmoothingMode.AntiAlias;

            e.Graphics.InterpolationMode = InterpolationMode.High;

 

            GraphicsPath path = new GraphicsPath();

 

            path.AddArc(new RectangleF(90, 90, 320, 220), 180, 180);

 

            e.Graphics.DrawPath(Pens.Green, path);

 

            DrawString(e.Graphics, Brushes.Blue, Font, "경로 위의 텍스트 입니다.", path, true );

            DrawString(e.Graphics, Brushes.Blue, Font, "경로 아래 텍스트 입니다.", path, false);

 

            path = new GraphicsPath();

 

            path.AddArc(new RectangleF(90, 100, 320, 220), 0, 180);

 

            e.Graphics.DrawPath(Pens.Red, path);

 

            DrawString(e.Graphics, Brushes.Blue, Font, "경로 위의 텍스트 입니다.", path, true );

            DrawString(e.Graphics, Brushes.Blue, Font, "경로 아래 텍스트 입니다.", path, false);

        }

 

        #endregion

 

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

 

        #region 문자열 그리기 - DrawString(graphics, brush, font, text, firstCharacter, startPoint, endPoint, textAboveSegment)

 

        /// <summary>

        /// 문자열 그리기

        /// </summary>

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

        /// <param name="brush">브러시</param>

        /// <param name="font">폰트</param>

        /// <param name="text">텍스트</param>

        /// <param name="firstCharacter">첫번째 문자</param>

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

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

        /// <param name="textAboveSegment">세그먼트 위 텍스트 여부</param>

        private void DrawString(Graphics graphics, Brush brush, Font font, string text, ref int firstCharacter, ref PointF startPoint,

            PointF endPoint, bool textAboveSegment)

        {

            float dx = endPoint.X - startPoint.X;

            float dy = endPoint.Y - startPoint.Y;

 

            float distance = (float)Math.Sqrt(dx * dx + dy * dy);

 

            dx /= distance;

            dy /= distance;

 

            int lastCharacter = firstCharacter;

 

            while(lastCharacter < text.Length)

            {

                string testString = text.Substring(firstCharacter, lastCharacter - firstCharacter + 1);

 

                if(graphics.MeasureString(testString, font).Width > distance)

                {

                    lastCharacter--;

 

                    break;

                }

 

                lastCharacter++;

            }

 

            if(lastCharacter < firstCharacter)

            {

                return;

            }

 

            if(lastCharacter >= text.Length)

            {

                lastCharacter = text.Length - 1;

            }

 

            string fitString = text.Substring(firstCharacter, lastCharacter - firstCharacter + 1);

 

            GraphicsState state = graphics.Save();

 

            if(textAboveSegment)

            {

                graphics.TranslateTransform(0, -graphics.MeasureString(fitString, font).Height, MatrixOrder.Append);

            }

 

            float angle = (float)(180 * Math.Atan2(dy, dx) / Math.PI);

 

            graphics.RotateTransform(angle, MatrixOrder.Append);

 

            graphics.TranslateTransform(startPoint.X, startPoint.Y, MatrixOrder.Append);

 

            graphics.DrawString(fitString, font, brush, 0, 0);

 

            graphics.Restore(state);

 

            firstCharacter = lastCharacter + 1;

 

            float textWidth = graphics.MeasureString(fitString, font).Width;

 

            startPoint = new PointF

            (

                startPoint.X + dx * textWidth,

                startPoint.Y + dy * textWidth

            );

        }

 

        #endregion

        #region 문자열 그리기 - DrawString(graphics, brush, font, text, graphicsPath, textAbovePath)

 

        /// <summary>

        /// 문자열 그리기

        /// </summary>

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

        /// <param name="brush">브러시</param>

        /// <param name="font">폰트</param>

        /// <param name="text">텍스트</param>

        /// <param name="graphicsPath">그래픽스 패스</param>

        /// <param name="textAbovePath">경로 위 텍스트 여부</param>

        private void DrawString(Graphics graphics, Brush brush, Font font, string text, GraphicsPath graphicsPath, bool textAbovePath)

        {

            graphicsPath = (GraphicsPath)graphicsPath.Clone();

 

            graphicsPath.Flatten();

 

            int firstCharacter = 0;

 

            PointF startPoint = graphicsPath.PathPoints[0];

 

            for(int i = 1; i < graphicsPath.PointCount; i++)

            {

                PointF endPoint = graphicsPath.PathPoints[i];

 

                DrawString(graphics, brush, font, text, ref firstCharacter, ref startPoint, endPoint, textAbovePath);

 

                if(firstCharacter >= text.Length)

                {

                    break;

                }

            }

        }

 

        #endregion

    }

}

 

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Posted by 사용자 icodebroker

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