SystemTrayMenu/UserInterface/RoundedRectangle.cs

// <copyright file="RoundedRectangle.cs" company="PlaceholderCompany">
// Copyright (c) PlaceholderCompany. All rights reserved.
// </copyright>

namespace SystemTrayMenu.UserInterface
{
    using System;
    using System.Data;
    using System.Drawing;
    using System.Drawing.Drawing2D;
    using System.Drawing.Imaging;
    using System.Globalization;
    using System.Reflection;
    using System.Runtime.InteropServices;
    using System.Windows.Forms;
    using SystemTrayMenu.DataClasses;
    using SystemTrayMenu.DllImports;
    using SystemTrayMenu.Helper;
    using SystemTrayMenu.Utilities;

    public static class RoundedRectangle
    {
        public static GraphicsPath RoundedRect(Rectangle bounds, int radius)
        {
            int diameter = radius * 2;
            Size size = new(diameter, diameter);
            Rectangle arc = new(bounds.Location, size);
            GraphicsPath path = new();

            if (radius == 0)
            {
                path.AddRectangle(bounds);
                return path;
            }

            // top left arc
            path.AddArc(arc, 180, 90);

            // top right arc
            arc.X = bounds.Right - diameter;
            path.AddArc(arc, 270, 90);

            // bottom right arc
            arc.Y = bounds.Bottom - diameter;
            path.AddArc(arc, 0, 90);

            // bottom left arc
            arc.X = bounds.Left;
            path.AddArc(arc, 90, 90);

            path.CloseFigure();
            return path;
        }

        public static void FillRoundedRectangle(Graphics graphics, Brush brush, Rectangle bounds, int cornerRadius)
        {
            if (graphics == null)
            {
                throw new ArgumentNullException("graphics");
            }

            if (brush == null)
            {
                throw new ArgumentNullException("brush");
            }

            using (GraphicsPath path = RoundedRect(bounds, cornerRadius))
            {
                graphics.FillPath(brush, path);
            }
        }
    }
}