using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;



namespace Microsoft.Research.DynamicDataDisplay.ViewportConstraints

{

	public sealed class DateTimeHorizontalAxisConstraint : ViewportConstraint

	{

		private readonly double minSeconds = new TimeSpan(DateTime.MinValue.Ticks).TotalSeconds;

		private readonly double maxSeconds = new TimeSpan(DateTime.MaxValue.Ticks).TotalSeconds;



		public override DataRect Apply(DataRect previousDataRect, DataRect proposedDataRect, Viewport2D viewport)

		{

			DataRect borderRect = DataRect.Create(minSeconds, proposedDataRect.YMin, maxSeconds, proposedDataRect.YMax);

			if (proposedDataRect.IntersectsWith(borderRect))

			{

				DataRect croppedRect = DataRect.Intersect(proposedDataRect, borderRect);

				return croppedRect;

			}



			return previousDataRect;

		}

	}

}