Redraw the button and make your own circular LED indicator

        Recently, in order to make a touch screen software for the upper computer , Customer requirements are the same as industrial touch screen interface , The indicator light is required to be made into a round . take C# Redraw the button shape in , Added gradient function from outside to inside , The code is as follows ：

        Practical application , add to LED After control , Modify properties type Value , The color of the indicator light will switch automatically .

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Test
{
    class Led : Button
    {
        private Color ledColor = Color.Silver;
        private bool type_;

        /// <summary>
        ///  Indicator color switching 
        /// </summary>
        public bool type
        {
            get
            {
                return type_;
            }
            set
            {
                if(this.type_ != value)
                {
                    this.type_ = value;
                    if(!this.type_)
                        ledColor = Color.Silver;
                    else
                        ledColor = Color.Lime;

                    // Force redraw 
                    this.Invalidate();
                }
            }
        }

        

        public Led()
        {
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.Ovalshape_Paint);
        }


        private void Ovalshape_Paint(object sender, PaintEventArgs e)
        {
            // Redraw time   Draw a circle with a radial color in the center 
            GraphicsPath path = new GraphicsPath();
            path.AddEllipse(0, 0, this.Size.Width, this.Size.Height);
            PathGradientBrush pthGrBrush = new PathGradientBrush(path);

            // The color of the center 
            pthGrBrush.CenterColor = Color.White;
            // The color of the edges 
            Color[] colors = new Color[] { this.ledColor };
            pthGrBrush.SurroundColors = colors;
            e.Graphics.FillEllipse(pthGrBrush, 0, 0, this.Size.Width, this.Size.Height);

            path.Dispose();
            pthGrBrush.Dispose();
        }




        protected override void OnPaint(PaintEventArgs pevent)
        {
            // Make the control boundary also circular 
            GraphicsPath gp = new GraphicsPath();
            gp.AddEllipse(0, 0, this.Width, this.Height);

            this.Region = new System.Drawing.Region(gp);
            base.OnPaint(pevent);
            base.OnPaint(pevent);

            gp.Dispose();
        }
    }
}