public TabSelectionChangedEventArgs(QuickTab sender, bool isSelected, int selIdx = -1)
{
Tab = sender;
IsSelected = isSelected;
SelectedIndex = selIdx;
}
private void FireTabSelectionChanged(QuickTab item, bool selState, int selIdx)
{
TabSelectionChanged?.Invoke(this, new TabSelectionChangedEventArgs(item, selState, selIdx));
}