XAML-Map-Control/MapUiTools/Avalonia/MenuButton.Avalonia.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Media;
using Avalonia.Metadata;
using Avalonia.Styling;
using System;

namespace MapControl.UiTools;

public partial class MenuButton
{
    public MenuButton()
    {
        var style = new Style();
        style.Setters.Add(new Setter(TextBlock.FontFamilyProperty, new FontFamily("Segoe MDL2 Assets")));
        style.Setters.Add(new Setter(TextBlock.FontSizeProperty, 20d));
        style.Setters.Add(new Setter(PaddingProperty, new Thickness(8)));
        Styles.Add(style);

        Flyout = new MenuFlyout();
        Loaded += async (_, _) => await Initialize();
    }

    public string Icon
    {
        get => Content as string;
        set => Content = value;
    }

    public MenuFlyout Menu => (MenuFlyout)Flyout;

    [Content]
    public ItemCollection Items => Menu.Items;

    protected override Type StyleKeyOverride => typeof(Button);
}