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■ 색상 휠 그리기

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TestProject.zip


MainForm.cs

 

 

using System.Drawing;

using System.Drawing.Drawing2D;

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.SmoothingMode = SmoothingMode.AntiAlias;

 

            int size = (ClientSize.Width > ClientSize.Height ? ClientSize.Height : ClientSize.Width) - 20;

            int left = (ClientSize.Width  - size) / 2;

            int top  = (ClientSize.Height - size) / 2;

 

            DrawColorWheel(e.Graphics, BackColor, left, top, size, size);

        }

 

        #endregion

 

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

 

        #region 서라운드 색상 배열 설정하기 - SetSurroundColorArray(surroundColorArray, index, stopPoint,

            fromAlpha, fromRed, fromGreen, fromBlue, toAlpha, toRed, toGreen, toBlue)

 

        /// <summary>

        /// 서라운드 색상 배열 설정하기

        /// </summary>

        /// <param name="surroundColorArray">서라운드 색상 배열</param>

        /// <param name="index">인덱스</param>

        /// <param name="stopPoint">중단 포인트</param>

        /// <param name="fromAlpha">FROM 투명도</param>

        /// <param name="fromRed">FROM 빨간색</param>

        /// <param name="fromGreen">FROM 녹색</param>

        /// <param name="fromBlue">FROM 파란색</param>

        /// <param name="toAlpha">TO 투명도</param>

        /// <param name="toRed">TO 빨간색</param>

        /// <param name="toGreen">TO 녹색</param>

        /// <param name="toBlue">TO 파란색</param>

        private void SetSurroundColorArray(Color[] surroundColorArray, ref int index, float stopPoint,

            int fromAlpha, int fromRed, int fromGreen, int fromBlue, int toAlpha, int toRed, int toGreen, int toBlue)

        {

            int pointCount = (int)stopPoint - index;

 

            float alpha = fromAlpha;

            float red   = fromRed;

            float green = fromGreen;

            float blue  = fromBlue;

 

            float deltaAlpha = (toAlpha - fromAlpha) / (pointCount - 1);

            float deltaRed   = (toRed   - fromRed  ) / (pointCount - 1);

            float deltaGreen = (toGreen - fromGreen) / (pointCount - 1);

            float deltaBlue  = (toBlue  - fromBlue ) / (pointCount - 1);

 

            for(int i = 0; i < pointCount; i++)

            {

                surroundColorArray[index++] = Color.FromArgb((int)alpha, (int)red, (int)green, (int)blue);

 

                alpha += deltaAlpha;

                red   += deltaRed;

                green += deltaGreen;

                blue  += deltaBlue;

            }

        }

 

        #endregion

        #region 색상 휠 그리기 - DrawColorWheel(graphics, outlineColor, minimumX, minimumY, width, height)

 

        /// <summary>

        /// 색상 휠 그리기

        /// </summary>

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

        /// <param name="outlineColor">외곽선 색상</param>

        /// <param name="minimumX">최소 X 좌표</param>

        /// <param name="minimumY">최소 Y 좌표</param>

        /// <param name="width">너비</param>

        /// <param name="height">높이</param>

        private void DrawColorWheel(Graphics graphics, Color outlineColor, int minimumX, int minimumY, int width, int height)

        {

            Rectangle rectangle = new Rectangle(minimumX, minimumY, width, height);

 

            GraphicsPath wheelGraphicsPath = new GraphicsPath();

 

            wheelGraphicsPath.AddEllipse(rectangle);

 

            wheelGraphicsPath.Flatten();

 

            float pointCount = (wheelGraphicsPath.PointCount - 1) / 6;

 

            Color[] surroundColorArray = new Color[wheelGraphicsPath.PointCount];

 

            int index = 0;

 

            SetSurroundColorArray(surroundColorArray, ref index, 1 * pointCount              , 255, 255, 0  , 0  , 255, 255, 0  , 255);

            SetSurroundColorArray(surroundColorArray, ref index, 2 * pointCount              , 255, 255, 0  , 255, 255, 0  , 0  , 255);

            SetSurroundColorArray(surroundColorArray, ref index, 3 * pointCount              , 255, 0  , 0  , 255, 255, 0  , 255, 255);

            SetSurroundColorArray(surroundColorArray, ref index, 4 * pointCount              , 255, 0  , 255, 255, 255, 0  , 255, 0  );

            SetSurroundColorArray(surroundColorArray, ref index, 5 * pointCount              , 255, 0  , 255, 0  , 255, 255, 255, 0  );

            SetSurroundColorArray(surroundColorArray, ref index, wheelGraphicsPath.PointCount, 255, 255, 255, 0  , 255, 255, 0  , 0  );

 

            using(PathGradientBrush pathBrush = new PathGradientBrush(wheelGraphicsPath))

            {

                pathBrush.CenterColor    = Color.White;

                pathBrush.SurroundColors = surroundColorArray;

 

                graphics.FillPath(pathBrush, wheelGraphicsPath);

 

                using(Pen thickPen = new Pen(outlineColor, 2))

                {

                    graphics.DrawPath(thickPen, wheelGraphicsPath);

                }

            }

        }

 

        #endregion

    }

}

 

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Posted by 사용자 icodebroker

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