selectAll method
选中所有 node, selected
, 是否选中
Implementation
void selectAll({bool selected = true}) {
assert(_isInitialized);
if (_nodes != null) {
List<EasyTreeNode<E>> result =
_nodes!.where((element) => element.level == 0).toList();
for (EasyTreeNode<E> node in result) {
this.select(node, selected: selected, selectAll: true);
}
_updateSelectedNodes();
}
}