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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;
namespace Tango.SharedUI.Converters
{
/// <summary>
/// Represents a binding converter for converting enum value to the associated description attribute if found.
/// </summary>
/// <seealso cref="System.Windows.Data.IValueConverter" />
public class EnumToDescriptionConverter : IValueConverter
{
/// <summary>
/// Converts a value.
/// </summary>
/// <param name="value">The value produced by the binding source.</param>
/// <param name="targetType">The type of the binding target property.</param>
/// <param name="parameter">The converter parameter to use.</param>
/// <param name="culture">The culture to use in the converter.</param>
/// <returns>
/// A converted value. If the method returns null, the valid null value is used.
/// </returns>
/// <exception cref="System.NotImplementedException"></exception>
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value != null)
{
return GetDescription(value, value.ToString());
}
else
{
return null;
}
}
public static string GetDescription(object enumValue, string defDesc)
{
FieldInfo fi = enumValue.GetType().GetField(enumValue.ToString());
if (null != fi)
{
object[] attrs = fi.GetCustomAttributes(typeof(DescriptionAttribute), true);
if (attrs != null && attrs.Length > 0)
return ((DescriptionAttribute)attrs[0]).Description;
}
return defDesc;
}
/// <summary>
/// Converts a value.
/// </summary>
/// <param name="value">The value that is produced by the binding target.</param>
/// <param name="targetType">The type to convert to.</param>
/// <param name="parameter">The converter parameter to use.</param>
/// <param name="culture">The culture to use in the converter.</param>
/// <returns>
/// A converted value. If the method returns null, the valid null value is used.
/// </returns>
/// <exception cref="System.NotImplementedException"></exception>
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return value;
}
}
}
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