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

namespace WpfAppTest.Converter
{
    public class NullableToVisibilityConverter : IValueConverter
    {
        /// <summary>
        /// The visibility value if the argument is null.
        /// </summary>
        public Visibility NullValue { get; set; }

        public Visibility NotNullValue { get; set; }

        /// <summary>
        /// Creates a new <see cref="NotNullToVisibilityConverter" />.
        /// </summary>
        public NullableToVisibilityConverter()
        {
            NullValue = Visibility.Collapsed;
            NotNullValue = Visibility.Visible;
        }

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return value == null ? NullValue : NotNullValue;
        }

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