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);
_currentTextEdit = _lastTextEdit = new PretokenStringContainer(true);
_innerItemsSource.Insert(_innerItemsSource.Count, _currentTextEdit);
ItemsSource = _innerItemsSource;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="TokenizingTextBox"/> class.
/// </summary>
public TokenizingTextBox()
{
// Setup our base state of our collection
_innerItemsSource = new InterspersedObservableCollection(new ObservableCollection <object>()); // TODO: Test this still will let us bind to ItemsSource in XAML?
_currentTextEdit = _lastTextEdit = new PretokenStringContainer(true);
_innerItemsSource.Insert(_innerItemsSource.Count, _currentTextEdit);
ItemsSource = _innerItemsSource;
//// TODO: Consolidate with callback below for ItemsSourceProperty changed?
DefaultStyleKey = typeof(TokenizingTextBox);
// TODO: Do we want to support ItemsSource better? Need to investigate how that works with adding...
RegisterPropertyChangedCallback(ItemsSourceProperty, ItemsSource_PropertyChanged);
PreviewKeyDown += TokenizingTextBox_PreviewKeyDown;
PreviewKeyUp += TokenizingTextBox_PreviewKeyUp;
CharacterReceived += TokenizingTextBox_CharacterReceived;
ItemClick += TokenizingTextBox_ItemClick;
}
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;
}
}