packages/MaterialDesignThemes.2.5.1/src/net45/Converters/TimeToVisibilityConverter.cs

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

namespace MaterialDesignThemes.Wpf.Converters
{
    public class TimeToVisibilityConverter: MarkupExtension, IValueConverter
    {
        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var time = (DateTime)value;

            var isPm = ((time.Hour >= 13) || (time.Hour == 0));

            return isPm ? Visibility.Visible : Visibility.Collapsed;
        }

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