Language selection menu (for UIToolkit @ Unity)

LocaleList.cs

// void* src = https://gist.github.com/andrew-raphael-lukasik/e4ae9b45a2c24672c0d1218f77235948
using System.Collections.Generic;
using System.Linq;

using UnityEngine;
using UnityEngine.UIElements;
using UnityEngine.Localization;
using UnityEngine.Localization.Settings;
using UnityEngine.ResourceManagement.AsyncOperations;

namespace Localization
{
	[UnityEngine.Scripting.Preserve]
    [UxmlElement]
	public partial class LocaleList : VisualElement
	{
#region fields


		ListView _listView = null;


#endregion
#region constructors


		public LocaleList()
		{
			var selectedLocale = LocalizationSettings.SelectedLocale;// forces synchronous load

			_listView = new ListView(
				itemsSource:	LocalizationSettings.AvailableLocales.Locales ,
				itemHeight:		16 ,
				makeItem:		OnMakeItem ,
				bindItem:		OnBindItem
			);
			_listView.selectionType = SelectionType.Single;
			{
				var style = _listView.style;
				style.minHeight = 16;
			}
			this.Add(_listView);
			_listView.itemsChosen += OnItemsChosen;
			_listView.Rebuild();

			LocalizationSettings.SelectedLocaleChanged += LocalizationSettings_SelectedLocaleChanged;
		}


#endregion
#region private methods


		VisualElement OnMakeItem()
		{
			return new Label();
		}

		void OnBindItem(
            VisualElement ve,
            int index
        )
		{
			Label label = (Label) ve;
			Locale locale = LocalizationSettings.AvailableLocales.Locales[index];
			label.text = locale.Identifier.CultureInfo.NativeName;
		}

		void OnItemsChosen(IEnumerable<object> objects)
        {
            if (objects.FirstOrDefault() is Locale locale)
                ChangeLocale(locale);
        }

		void ChangeLocale(Locale locale)
		{
			if (locale!=null)
			{
				LocalizationSettings.SelectedLocaleChanged -= LocalizationSettings_SelectedLocaleChanged;
				LocalizationSettings.SelectedLocale = locale;
				LocalizationSettings.SelectedLocaleChanged += LocalizationSettings_SelectedLocaleChanged;
			}
			else Debug.LogWarning("locale object is null");
		}

		void LocalizationSettings_SelectedLocaleChanged(Locale locale)
		{
            int idx = LocalizationSettings.AvailableLocales.Locales.IndexOf(locale);
			_listView.ScrollToItem(idx);
		}


#endregion
	}
}