private void ResetChildListener(INotifyPropertyChanged item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
RemoveItem(item);
ChangeListener listener = null;
// Add new
if (item is INotifyCollectionChanged)
{
listener = new CollectionChangeListener(_value, item as INotifyCollectionChanged, propertyName, base.propsToIgnore);
}
else
{
listener = new ChildChangeListener(item as INotifyPropertyChanged, base.propsToIgnore);
}
listener.PropertyChanged += listener_PropertyChanged;
listener.DeepCollectionChanged += Listener_DeepCollectionChanged;
_collectionListeners.Add(item, listener);
RaiseDeepCollectionChanged(_parent, propertyName, item, null);
listener.Subscribe();
}
/// <summary>
/// Resets known (must exist in children collection) child event handlers
/// </summary>
/// <param name="propertyName">Name of known child property</param>
private void ResetChildListener(string propertyName)
{
if (_childListeners.ContainsKey(propertyName))
{
// Unsubscribe if existing
if (_childListeners[propertyName] != null)
{
_childListeners[propertyName].PropertyChanged -= new PropertyChangedEventHandler(child_PropertyChanged);
_childListeners[propertyName].DeepCollectionChanged -= ChildChangeListener_DeepCollectionChanged;
// Should unsubscribe all events
_childListeners[propertyName].Dispose();
_childListeners[propertyName] = null;
}
var property = _type.GetProperty(propertyName);
if (property == null)
{
throw new InvalidOperationException(string.Format("Was unable to get '{0}' property information from Type '{1}'", propertyName, _type.Name));
}
object newValue = property.GetValue(_value, null);
// Only recreate if there is a new value
if (newValue != null)
{
if (newValue is INotifyCollectionChanged)
{
_childListeners[propertyName] =
new CollectionChangeListener(_value, newValue as INotifyCollectionChanged, propertyName, propsToIgnore);
}
else if (newValue is INotifyPropertyChanged)
{
_childListeners[propertyName] =
new ChildChangeListener(newValue as INotifyPropertyChanged, propertyName, propsToIgnore);
}
if (_childListeners[propertyName] != null)
{
_childListeners[propertyName].PropertyChanged += new PropertyChangedEventHandler(child_PropertyChanged);
_childListeners[propertyName].DeepCollectionChanged += ChildChangeListener_DeepCollectionChanged;
_childListeners[propertyName].Subscribe();
}
}
}
}