/// <summary>
/// initialise items collection
/// add some changed listener
/// </summary>
public Wizard()
{
Items = new AvaloniaList <WizardPage>();
CurrentPageProperty.Changed.AddClassHandler((Action <Wizard, AvaloniaPropertyChangedEventArgs>)((o, e) => OnCurrentPageChanged(o, e)));
ItemsPanelProperty.Changed.AddClassHandler((Action <Wizard, AvaloniaPropertyChangedEventArgs>)((o, e) => OnItemChanged(o, e)));
ItemsProperty.Changed.AddClassHandler((Action <Wizard, AvaloniaPropertyChangedEventArgs>)((o, e) => OnItemSourceChanged(o, e)));
Initialized += (o, e) =>
{
if (Items.OfType <object>().Any() && CurrentPage == null)
{
CurrentPage = Items.OfType <WizardPage>().FirstOrDefault();
}
};
}