Xamarin.PropertyEditing.Windows/HasItemsToVisibilityConverter.cs


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using System;
using System.Collections;
using System.Globalization;
using System.Linq;
using System.Windows;
using System.Windows.Data;
using System.Windows.Markup;

namespace Xamarin.PropertyEditing.Windows
{
	internal class HasItemsToVisibilityConverter : MarkupExtension, IValueConverter
	{
		public object Convert (object value, Type targetType, object parameter, CultureInfo culture) =>
			(value is ICollection enumerable)
				? (enumerable.Count > 0 ? Visibility.Visible : Visibility.Collapsed)
				: Visibility.Visible;

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

		public override object ProvideValue (IServiceProvider serviceProvider) => this;
	}
}