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

namespace WindowsFormsApp1
{
    internal class MyProcessBar : ProgressBar
    {

        private Color _foreColor = Color.Blue;
        private Color _backColor = Color.White;

        public MyProcessBar()
        {
            SetStyle(ControlStyles.UserPaint, true);
        }

        [System.ComponentModel.Category("Custom")]
        public Color ForeColor
        {
            get { return _foreColor; }
            set
            {
                _foreColor = value;
                Invalidate();
            }
        }

        [System.ComponentModel.Category("Custom")]
        public Color BackColor
        {
            get { return _backColor; }
            set
            {
                _backColor = value;
                Invalidate();
            }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            Rectangle rect = ClientRectangle;
            rect.Width = (int)((double)rect.Width * (Value / (double)Maximum));

            using (Brush backBrush = new SolidBrush(BackColor))
            {
                e.Graphics.FillRectangle(backBrush, rect);
            }

            using (Brush foreBrush = new SolidBrush(ForeColor))
            {
                rect.Width -= 1; // 为了避免绘制时超出边界，稍微减少宽度  
                e.Graphics.FillRectangle(foreBrush, new Rectangle(rect.Left + 1, rect.Top + 1, rect.Width - 1, rect.Height - 1));
            }
        }

    }
}