private static void OnFileSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DrawingControl control = (DrawingControl)d;
control._FileSource = e.NewValue?.ToString();
control.OnFileSourceChanged(control._FileSource);
}
private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DrawingControl control = (DrawingControl)d;
if (e.NewValue is IEnumerable <IRoute> enumerable)
{
control._items.Clear();
control._items.AddRange(enumerable.OfType <IRoute>());
}
else
{
control._items.Clear();
}
control.OnItemsSourceChanged(e.NewValue as IEnumerable <IRoute>);
}