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where-is-makkah / WhereIsMakkah / Util / InverseBooleanConverter.cs

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

namespace WhereIsMakkah.Util
{
    public class InverseBooleanConverter : IValueConverter
    {
        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (targetType != typeof(bool))
                throw new InvalidOperationException("The target must be a boolean");

            return !(bool)value;
        }

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

        #endregion
    }
}