/// <summary>
/// Called when SelectedItem had changed
/// </summary>
/// <param name="parent"><see cref="TabControl"/> where this behavior is attached to</param>
/// <param name="e">Change notification</param>
private static void OnSelectedItemPropertyChanged(DependencyObject parent, DependencyPropertyChangedEventArgs e)
{
TabItemGeneratorBehavior instance = GetHandler(parent as TabControl);
instance._innerSelection = (null == e.NewValue) ? null
: instance._tabControl.Items.Cast <TabItem>().FirstOrDefault(t => e.NewValue.Equals(t.DataContext));
instance.PropertyChanged(instance, new PropertyChangedEventArgs("SelectedTabItem"));
}
//-------------------------------------------------------------------
// Notification Delegates
//-------------------------------------------------------------------
#region Dependency Property Notification Delegates
/// <summary>
/// Called when ItemsSource had changed
/// </summary>
/// <param name="parent"><see cref="TabControl"/> where this behavior is attached to</param>
/// <param name="e">Change notification</param>
private static void OnItemsSourcePropertyChanged(DependencyObject parent, DependencyPropertyChangedEventArgs e)
{
TabItemGeneratorBehavior instance = GetHandler(parent as TabControl);
IEnumerable value = e.NewValue as IEnumerable;
if (ReferenceEquals(instance._itemsSource, value))
{
return;
}
// Unregister from previous source
if (null != instance._itemsSource)
{
((INotifyCollectionChanged)instance._itemsSource).CollectionChanged -= instance.OnSourceCollectionChanged;
instance._tabControl.Items.Clear();
instance._itemsSource = null;
}
// Check if source exists
if (null == value)
{
return;
}
// Register new source
INotifyCollectionChanged notifyCollectionChanged = value as INotifyCollectionChanged;
if (null == notifyCollectionChanged)
{
return;
}
instance._itemsSource = value;
notifyCollectionChanged.CollectionChanged += instance.OnSourceCollectionChanged;
}