/Main/src/DynamicDataDisplay/Common/Auxiliary/NotifyCollectionChangedEventArgsExtensions.cs
C# | 29 lines | 24 code | 5 blank | 0 comment | 2 complexity | 3b1e528c1162409b281d1dcc2ef386c3 MD5 | raw file
Possible License(s): CC-BY-SA-3.0
1using System; 2using System.Collections.Generic; 3using System.Linq; 4using System.Text; 5using System.Collections.Specialized; 6using Microsoft.Research.DynamicDataDisplay.Charts; 7 8namespace Microsoft.Research.DynamicDataDisplay.Common.Auxiliary 9{ 10 public static class NotifyCollectionChangedEventArgsExtensions 11 { 12 public static int GetLastAddedIndex(this NotifyCollectionChangedEventArgs args) 13 { 14 if (args.NewItems == null) 15 throw new InvalidOperationException("Cannot get last added index when NewItems are null."); 16 17 int lastIndex = args.NewStartingIndex + args.NewItems.Count; 18 19 return lastIndex; 20 } 21 22 public static Range<int> GetAddedRange(this NotifyCollectionChangedEventArgs args) 23 { 24 int lastIndex = GetLastAddedIndex(args); 25 26 return new Range<int>(args.NewStartingIndex, lastIndex); 27 } 28 } 29}