/Main/src/DynamicDataDisplay/ViewportConstraints/DateTimeHorizontalAxisConstraint.cs

 1using System;
 2using System.Collections.Generic;
 3using System.Linq;
 4using System.Text;
 5
 6namespace Microsoft.Research.DynamicDataDisplay.ViewportConstraints
 7{
 8	public sealed class DateTimeHorizontalAxisConstraint : ViewportConstraint
 9	{
10		private readonly double minSeconds = new TimeSpan(DateTime.MinValue.Ticks).TotalSeconds;
11		private readonly double maxSeconds = new TimeSpan(DateTime.MaxValue.Ticks).TotalSeconds;
12
13		public override DataRect Apply(DataRect previousDataRect, DataRect proposedDataRect, Viewport2D viewport)
14		{
15			DataRect borderRect = DataRect.Create(minSeconds, proposedDataRect.YMin, maxSeconds, proposedDataRect.YMax);
16			if (proposedDataRect.IntersectsWith(borderRect))
17			{
18				DataRect croppedRect = DataRect.Intersect(proposedDataRect, borderRect);
19				return croppedRect;
20			}
21
22			return previousDataRect;
23		}
24	}
25}