using System;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Data;

namespace VideoOS.Mobile.SDK.Samples.UWP
{
    /// <summary>
    /// Value converter that translates true to <see cref="Visibility.Visible"/> and false to
    /// <see cref="Visibility.Collapsed"/>.
    /// </summary>
    public sealed class BooleanToVisibilityConverter : IValueConverter
    {
        /// <summary>
        /// Converts the specified value.
        /// </summary>
        /// <param name="value">The value.</param>
        /// <param name="targetType">Type of the target.</param>
        /// <param name="parameter">The parameter.</param>
        /// <param name="language">The language.</param>
        /// <returns></returns>
        public object Convert(object value, Type targetType, object parameter, string language)
        {
            return (value is bool && (bool)value) ? Visibility.Visible : Visibility.Collapsed;
        }

        /// <summary>
        /// Converts back.
        /// </summary>
        /// <param name="value">The value.</param>
        /// <param name="targetType">Type of the target.</param>
        /// <param name="parameter">The parameter.</param>
        /// <param name="language">The language.</param>
        /// <returns></returns>
        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            return value is Visibility && (Visibility)value == Visibility.Visible;
        }
    }
}