/// <summary>
/// Returns the factory that is used to create widgets (or compounds).
/// The factory is created the first time it's required.
/// </summary>
/// <seealso cref="IWidget"/>
/// <seealso cref="IWidgetCompound"/>
/// <returns>Factory for creating widgets or compounds</returns>
public IWidgetFactory GetWidgetFactory()
{
return(_widgetFactory ?? (_widgetFactory = _uiProvider.GetWidgetFactory()));
}