UserListMainTreeItem.java 文件源码

@Override
public void onChanged(final SetChangeListener.Change<? extends User> c) {
    final User userAdded = c.getElementAdded();
    if (userAdded != null) {
        addTreeItemsViewCallback(Collections.singleton(userAdded));
        selectUser(userAdded);
    }

    final User userRemoved = c.getElementRemoved();
    if (userRemoved != null)
        removeTreeItemsViewCallback(Collections.singleton(userRemoved));
}