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

namespace Gestor.Common.Converters
{
	public class NullVisibilityConverter : MarkupExtension, IValueConverter
	{
		public NullVisibilityConverter()
		{
		}

		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			return (value != null ? Visibility.Visible : Visibility.Collapsed);
		}

		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
			return null;
		}

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