/// <inheritdoc/>
protected override void RemoveItem(int index)
{
var collectionChanged = itemRemoved;
if (collectionChanged != null)
{
var e = new FastTrackingCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, this[index], null, index, true);
collectionChanged(this, ref e);
}
base.RemoveItem(index);
}
/// <inheritdoc/>
protected override void InsertItem(int index, T item)
{
base.InsertItem(index, item);
var collectionChanged = itemAdded;
if (collectionChanged == null)
{
return;
}
var e = new FastTrackingCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item, null, index, true);
collectionChanged(this, ref e);
}
protected void ClearItemsEvents()
{
var collectionChanged = itemRemoved;
if (collectionChanged == null)
{
return;
}
for (var i = Count - 1; i >= 0; --i)
{
var e = new FastTrackingCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, this[i], null, i, true);
collectionChanged(this, ref e);
}
}
/// <inheritdoc/>
protected override void SetItem(int index, T item)
{
// Note: Changing CollectionChanged is not thread-safe
var collectionChangedRemoved = itemRemoved;
var oldItem = (collectionChangedRemoved != null) ? (object)this[index] : null;
if (collectionChangedRemoved != null)
{
var e = new FastTrackingCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, oldItem, null, index);
collectionChangedRemoved(this, ref e);
}
base.SetItem(index, item);
var collectionChangedAdded = itemAdded;
if (collectionChangedAdded != null)
{
var e = new FastTrackingCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item, oldItem, index);
collectionChangedAdded(this, ref e);
}
}