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Backup/Charts/Axes/DateTime/Strategies/DefaultDateTimeTicksStrategy.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Microsoft.Research.DynamicDataDisplay.Charts
+{
+	public class DefaultDateTimeTicksStrategy : IDateTimeTicksStrategy
+	{
+		public virtual DifferenceIn GetDifference(TimeSpan span)
+		{
+			span = span.Duration();
+
+			DifferenceIn diff;
+			if (span.Days > 365)
+				diff = DifferenceIn.Year;
+			else if (span.Days > 30)
+				diff = DifferenceIn.Month;
+			else if (span.Days > 0)
+				diff = DifferenceIn.Day;
+			else if (span.Hours > 0)
+				diff = DifferenceIn.Hour;
+			else if (span.Minutes > 0)
+				diff = DifferenceIn.Minute;
+			else if (span.Seconds > 0)
+				diff = DifferenceIn.Second;
+			else
+				diff = DifferenceIn.Millisecond;
+
+			return diff;
+		}
+
+		public virtual bool TryGetLowerDiff(DifferenceIn diff, out DifferenceIn lowerDiff)
+		{
+			lowerDiff = diff;
+
+			int code = (int)diff;
+			bool res = code > (int)DifferenceIn.Smallest;
+			if (res)
+			{
+				lowerDiff = (DifferenceIn)(code - 1);
+			}
+			return res;
+		}
+
+		public virtual bool TryGetBiggerDiff(DifferenceIn diff, out DifferenceIn biggerDiff)
+		{
+			biggerDiff = diff;
+
+			int code = (int)diff;
+			bool res = code < (int)DifferenceIn.Biggest;
+			if (res)
+			{
+				biggerDiff = (DifferenceIn)(code + 1);
+			}
+			return res;
+		}
+	}
+}