private async void OnListItemDisappearing(object sender, ItemVisibilityEventArgs e)
{
// Experimental - Hiding and showing the FAB correctly is dependent on the objects in the list being unique
if (!(sender is Xamarin.Forms.ListView list))
{
return;
}
await Task.Run(() =>
{
if (list.ItemsSource is IList items)
{
var index = items.IndexOf(e.Item);
if (index < appearingListItemIndex && index >= 0)
{
appearingListItemIndex = index;
Device.BeginInvokeOnMainThread(async() =>
{
fab.Hide();
await Task.Delay(500);
fab.Show();
});
}
else
{
appearingListItemIndex = index;
}
}
});
}
public override void OnScrollDown()
{
fab.Show();
if (ScrollDirectionListener != null)
{
ScrollDirectionListener.OnScrollDown();
}
}