Initial Commit

ViewportRestrictions/DateTimeVerticalAxisRestriction.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Microsoft.Research.DynamicDataDisplay.ViewportRestrictions
+{
+	public sealed class DateTimeVerticalAxisRestriction : ViewportRestriction
+	{
+		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(proposedDataRect.XMin, minSeconds, proposedDataRect.XMax, maxSeconds);
+			if (proposedDataRect.IntersectsWith(borderRect))
+			{
+				DataRect croppedRect = DataRect.Intersect(proposedDataRect, borderRect);
+				return croppedRect;
+			}
+
+			return previousDataRect;
+		}
+	}
+}