Zeta Enterprise Library

namespace Zeta.EnterpriseLibrary.Tools
{
	using System;
	using System.ComponentModel;
	using System.Globalization;
	using Properties;
	using Common;

	/// <summary>
	/// BooleanLocalizedConverter uses local string for TRUE and FALSE.
	/// See also http://netcode.ru/dotnet/?lang=&katID=30&skatID=264&artID=7319.
	/// 
	/// Usage: 
	///		Apply [TypeConverter( typeof( BooleanLocalizedConverter ) )]
	///		to a property.
	/// </summary>
	public class BooleanLocalizedConverter : BooleanConverter
	{
		public override object ConvertTo(
			ITypeDescriptorContext context,
			CultureInfo culture,
			object value,
			Type destinationType )
		{
			if ( value is bool && destinationType == typeof( string ) )
			{
				return GetLocalized( ConvertHelper.ToBoolean( value ) );
			}
			else if ( value is string && destinationType == typeof( string ) )
			{
				return GetLocalized( ConvertHelper.ToBoolean( value ) );
			}
			else
			{
				return base.ConvertTo( context, culture, value, destinationType );
			}
		}

		public override object ConvertFrom(
			ITypeDescriptorContext context,
			CultureInfo culture,
			object value )
		{
			if ( value is string )
			{
				var v = (string)value;

				return v == Resources.SR_BooleanLocalizedConverter_True;
			}
			else if ( value is bool )
			{
				return GetLocalized( ConvertHelper.ToBoolean( value ) );
			}
			else
			{
				return base.ConvertFrom( context, culture, value );
			}
		}

		private static object GetLocalized( bool b )
		{
			return b
				? Resources.SR_BooleanLocalizedConverter_True
				: Resources.SR_BooleanLocalizedConverter_False;
		}
	}
}