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

namespace AGVControl
{
    public partial class RoundButton : Button
    {
        public int CornerRadius { get; set; } = 7;
        public RoundButton()
        {
            InitializeComponent();

            // Set Optimized Double Buffer to reduce flickering
            this.SetStyle(ControlStyles.UserPaint, true);
            this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);

            // Redraw when resized
            this.SetStyle(ControlStyles.ResizeRedraw, true);

            this.Resize += arLabel_Resize;
        }

        protected override void OnPaint(PaintEventArgs pevent)
        {
            pevent.Graphics.InterpolationMode = InterpolationMode.High;
            pevent.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
            pevent.Graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;

            var XPosition = this.DisplayRectangle.Left;
            var YPosition = this.DisplayRectangle.Top;
            using (GraphicsPath Path = new GraphicsPath())
            {
                Path.AddLine(XPosition + CornerRadius, YPosition, XPosition + Width - (CornerRadius * 2), YPosition);
                Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition, CornerRadius * 2, CornerRadius * 2, 270, 90);
                Path.AddLine(XPosition + Width, YPosition + CornerRadius, XPosition + Width, YPosition + Height - (CornerRadius * 2));
                Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 0, 90);
                Path.AddLine(XPosition + Width - (CornerRadius * 2), YPosition + Height, XPosition + CornerRadius, YPosition + Height);
                Path.AddArc(XPosition, YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 90, 90);
                Path.AddLine(XPosition, YPosition + Height - (CornerRadius * 2), XPosition, YPosition + CornerRadius);
                Path.AddArc(XPosition, YPosition, CornerRadius * 2, CornerRadius * 2, 180, 90);
                Path.CloseFigure();
                this.Region = new System.Drawing.Region(Path);
            }
            base.OnPaint(pevent);
        }

        void arLabel_Resize(object sender, EventArgs e)
        {
            Invalidate();
        }

    }
}