protected void NotifyCollectionChanged(object sender, NotifyKeyGroupCollectionChangedEventArgs <TKey, TItem> e)
{
NSThreadExtensions.ExecuteOnMainThread(() =>
{
IosDataSourceHandler.Handle(_tableViewRef.Target, e);
});
}
private void NotifyCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (_tableViewRef.Target == null)
{
return;
}
NSThreadExtensions.ExecuteOnMainThread(() =>
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
var count = e.NewItems.Count;
var paths = new NSIndexPath[count];
for (var i = 0; i < count; i++)
{
paths[i] = NSIndexPath.FromRowSection(e.NewStartingIndex + i, 0);
}
_tableViewRef.Target?.InsertRows(paths, UITableViewRowAnimation.Automatic);
}
break;
case NotifyCollectionChangedAction.Remove:
{
var count = e.OldItems.Count;
var paths = new NSIndexPath[count];
for (var i = 0; i < count; i++)
{
var index = NSIndexPath.FromRowSection(e.OldStartingIndex + i, 0);
paths[i] = index;
}
_tableViewRef.Target?.DeleteRows(paths, UITableViewRowAnimation.Automatic);
}
break;
case NotifyCollectionChangedAction.Move:
{
if (e.NewItems.Count != 1 || e.OldItems.Count != 1)
{
_tableViewRef.Target?.ReloadData();
break;
}
if (e.NewStartingIndex != e.OldStartingIndex)
{
_tableViewRef.Target?.MoveRow(NSIndexPath.FromRowSection(e.OldStartingIndex, 0),
NSIndexPath.FromRowSection(e.NewStartingIndex, 0));
}
break;
}
default:
_tableViewRef.Target?.ReloadData();
break;
}
});
}