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- added processing for NotifyCollectionChangedAction.Move to DataGrid… #182

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- added processing for NotifyCollectionChangedAction.Move to DataGrid… #182

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24 changes: 23 additions & 1 deletion src/Avalonia.Controls.DataGrid/Collections/DataGridCollectionView.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3442,7 +3442,29 @@ private void ProcessCollectionChanged(NotifyCollectionChangedEventArgs args)
RefreshOrDefer();
return;
}


// process move action and fire notification
if (args.OldItems != null && args.Action == NotifyCollectionChangedAction.Move)
{
var targetList = UsesLocalArray ? _internalList : SourceList;

for (int i = 0; i < args.OldItems.Count; i++)
{
var item = args.OldItems[i];

int oldIndex = targetList.IndexOf(item);
if (oldIndex >= 0)
targetList.RemoveAt(oldIndex);

int newIndex = Math.Min(args.NewStartingIndex + i, targetList.Count);

targetList.Insert(newIndex, item);

OnCollectionChanged(new NotifyCollectionChangedEventArgs(
NotifyCollectionChangedAction.Move, item, newIndex, oldIndex));
}
}

// fire notifications for removes
if (args.OldItems != null &&
(args.Action == NotifyCollectionChangedAction.Remove ||
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