using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;

namespace Microsoft.Research.DynamicDataDisplay
{
	/// <summary>
	/// Represents a DataTransform that simply swaps points' coefficitiens from x to y and vice verca.
	/// </summary>
	public sealed class SwapTransform : DataTransform
	{
		/// <summary>
		/// Initializes a new instance of the <see cref="SwapTransform"/> class.
		/// </summary>
		public SwapTransform() { }

		/// <summary>
		/// Transforms the point in data coordinates to viewport coordinates.
		/// </summary>
		/// <param name="pt">The point in data coordinates.</param>
		/// <returns>
		/// Transformed point in viewport coordinates.
		/// </returns>
		public override Point DataToViewport(Point pt)
		{
			return new Point(pt.Y, pt.X);
		}

		/// <summary>
		/// Transforms the point in viewport coordinates to data coordinates.
		/// </summary>
		/// <param name="pt">The point in viewport coordinates.</param>
		/// <returns>Transformed point in data coordinates.</returns>
		public override Point ViewportToData(Point pt)
		{
			return new Point(pt.Y, pt.X);
		}
	}
}
