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

namespace DTS.Common.Converters
{

    /// <summary>
    /// Converter which converts percentage to String.
    /// </summary>
    public class PercentConverter : IValueConverter
    {
        /// <summary>
        /// 
        /// </summary>
        /// <param name="value">The decimal value to convert. This value can be a standard decimal value or a nullable decimal value.</param>
        /// <param name="targetType">This parameter is not used.</param>
        /// <param name="parameter">This parameter is not used.</param>
        /// <param name="culture">The culture to use in the format operation.</param>
        /// <returns>The value to be passed to the target dependency property.</returns>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var result = value as decimal? ?? 0;
            return String.Format(CultureInfo.CurrentUICulture, "{0:F1}%", result);
        }

        /// <summary>
        /// Conversion back is not supported.
        /// </summary>
        /// <param name="value">A currency value.</param>
        /// <param name="targetType">This parameter is not used.</param>
        /// <param name="parameter">This parameter is not used.</param>
        /// <param name="culture">This parameter is not used.</param>
        /// <returns>The value to be passed to the source object.</returns>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}