private void TokenizingTextBoxItem_LostFocus(object sender, RoutedEventArgs e)
{
// Keep track of our currently focused textbox
if (sender is TokenizingTextBoxItem ttbi && ttbi.Content is PretokenStringContainer text &&
string.IsNullOrWhiteSpace(text.Text) && text != _lastTextEdit)
{
// We're leaving an inner textbox that's blank, so we'll remove it
_innerItemsSource.Remove(text);
UpdateCurrentTextEdit(_lastTextEdit);
}
}
private void ItemsSource_PropertyChanged(DependencyObject sender, DependencyProperty dp)
{
// If we're given a different ItemsSource, we need to wrap that collection in our helper class.
if (ItemsSource != null && ItemsSource.GetType() != typeof(InterspersedObservableCollection))
{
_innerItemsSource = new InterspersedObservableCollection(ItemsSource);
if (ReadLocalValue(MaximumTokensProperty) != DependencyProperty.UnsetValue && _innerItemsSource.ItemsSource.Count >= MaximumTokens)
{
// Reduce down to below the max as necessary.
var endCount = MaximumTokens > 0 ? MaximumTokens : 0;
for (var i = _innerItemsSource.ItemsSource.Count - 1; i >= endCount; --i)
{
_innerItemsSource.Remove(_innerItemsSource[i]);
}
}
_currentTextEdit = _lastTextEdit = new PretokenStringContainer(true);
_innerItemsSource.Insert(_innerItemsSource.Count, _currentTextEdit);
ItemsSource = _innerItemsSource;
}
}
