SystemTrayMenu/Utilities/IconToImageSourceConverter.cs

// <copyright file="IconToImageSourceConverter.cs" company="PlaceholderCompany">
// Copyright (c) PlaceholderCompany. All rights reserved.
// </copyright>
//
// Copyright (c) 2022-2023 Peter Kirmeier

namespace SystemTrayMenu.Utilities
{
    using System;
    using System.Drawing;
    using System.Globalization;
    using System.Windows;
    using System.Windows.Data;
    using System.Windows.Interop;
    using System.Windows.Markup;
    using System.Windows.Media;
    using System.Windows.Media.Imaging;

    [ValueConversion(typeof(Icon), typeof(ImageSource))]
    public class IconToImageSourceConverter : MarkupExtension, IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value != null)
            {
                // Invalid Icon happens usually only during design time with dummy default data
                Icon icon = value is Icon validIcon ? validIcon : SystemIcons.Error;
                return Imaging.CreateBitmapSourceFromHIcon(
                    icon.Handle,
                    Int32Rect.Empty,
                    BitmapSizeOptions.FromEmptyOptions());
            }

            return null!;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }
    }
}