using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace FontPreview;

internal class RoundPanel : Panel
{
	private bool mouseOver;

	public int Radius { get; set; }

	public Color BorderColor { get; set; }

	public Color HoverBorder { get; set; }

	public RoundPanel()
	{
		DoubleBuffered = true;
		Radius = 10;
		BorderColor = Color.FromArgb(226, 230, 235);
		HoverBorder = Color.FromArgb(98, 137, 200);
		BackColor = Color.White;
		SetStyle((ControlStyles)139266, true);
	}

	protected override void OnResize(EventArgs eventargs)
	{
		base.OnResize(eventargs);
		if (Width > 0 && Height > 0)
		{
			GraphicsPath path = GetPath();
			try
			{
				Region = new Region(path);
			}
			finally
			{
				path?.Dispose();
			}
		}
		Invalidate();
	}

	protected override void OnPaint(PaintEventArgs e)
	{
		base.OnPaint(e);
		e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
		GraphicsPath path = GetPath();
		try
		{
			Pen val = new Pen(mouseOver ? HoverBorder : BorderColor, 1.5f);
			try
			{
				e.Graphics.DrawPath(val, path);
			}
			finally
			{
				val?.Dispose();
			}
		}
		finally
		{
			path?.Dispose();
		}
	}

	protected override void OnMouseEnter(EventArgs e)
	{
		mouseOver = true;
		Invalidate();
		base.OnMouseEnter(e);
	}

	protected override void OnMouseLeave(EventArgs e)
	{
		mouseOver = false;
		Invalidate();
		base.OnMouseLeave(e);
	}

	private GraphicsPath GetPath()
	{
		int radius = Radius;
		int num = Width - 1;
		int num2 = Height - 1;
		GraphicsPath val = new GraphicsPath();
		val.AddArc(0, 0, radius * 2, radius * 2, 180f, 90f);
		val.AddArc(num - radius * 2, 0, radius * 2, radius * 2, 270f, 90f);
		val.AddArc(num - radius * 2, num2 - radius * 2, radius * 2, radius * 2, 0f, 90f);
		val.AddArc(0, num2 - radius * 2, radius * 2, radius * 2, 90f, 90f);
		val.CloseFigure();
		return val;
	}
}