using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Data;

using System.Windows;



namespace Microsoft.Research.DynamicDataDisplay.Converters

{

	public abstract class TwoValuesMultiConverter<T1, T2> : IMultiValueConverter

	{

		#region IMultiValueConverter Members



		public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)

		{

			if (values != null && values.Length == 2)

			{

				if (values[0] is T1 && values[1] is T2)

				{

					T1 param1 = (T1)values[0];

					T2 param2 = (T2)values[1];



					var result = ConvertCore(param1, param2, targetType, parameter, culture);

					return result;

				}

			}



			return DependencyProperty.UnsetValue;

		}



		protected abstract object ConvertCore(T1 value1, T2 value2, Type targetType, object parameter, System.Globalization.CultureInfo culture);



		public virtual object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)

		{

			throw new NotSupportedException();

		}



		#endregion

	}

}