How can expand the new node just added

[chicochen]

I use below codes,adding is success, but current node still not expanded

MyTreeNode newNode = new MyTreeNode(Long.valueOf(-1));
 newNode.setNodeName("<NA>");
 MyTreeNode sNode = (MyTreeNode) selectedNode;
 sNode.addChild(newNode);

 TreeRowKey keys = (TreeRowKey)tree.getRowKey();
// tree.setRowKey(null);
// tree.queueEvent(new AjaxEvent(tree.getNodeFacet()));
// tree.setRowKey(keys);

 Iterator iterator= keys.iterator();
 ArrayList al = new ArrayList();
 while (iterator.hasNext()){
 Long lon = (Long)iterator.next();
 al.add(lon);
 }
 al.add(newNode.getNodeid());
 ListRowKey newKeys = new ListRowKey(al);
 tree.setRowKey(newKeys);
 TreeState state = (TreeState) tree.getComponentState();
 try {
 state.expandNode(newKeys);
 } catch (IOException e) {
 e.printStackTrace();
 }

[chicochen]

It's ok now!

public void expandNode(MyTreeNode node) {
 ArrayList<Long> path = new ArrayList<Long>();
 while (node != null) {
 path.add(node.getNodeid());
 node = (MyTreeNode) node.getParent();
 }
 Collections.reverse(path);
 path.remove(0); // dont expand rootnode, it is not displayed

 for (int i = 0; i < path.size(); i++) {
 ArrayList<Long> list = new ArrayList<Long>();
 for (int n = 0; n <= i; n++) {
 list.add(path.get(n));
 }

 ListRowKey key = new ListRowKey(list);
 try {
 ((HtmlTree) tree).queueNodeExpand(key);
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 }

[bm97]

Thanks, it works.

But, when you don't want to get the first child of the node expanded, remove the deepest node too.

public final void expandNode(AbstractTreeNode node) {
 final ArrayList<Object> path = new ArrayList<Object>();
 while (node != null) {
 path.add(node.getNodeId());
 node = (AbstractTreeNode) node.getParent();
 }

 // ADDED
 path.remove(0); //dont expand first child
 // ADDED

 Collections.reverse(path);
 path.remove(0); // dont expand rootnode, it is not displayed

 for (int i = 0; i < path.size(); i++) {
 final ArrayList<Object> list = new ArrayList<Object>();
 for (int n = 0; n <= i; n++) {
 list.add(path.get(n));
 }

 final ListRowKey key = new ListRowKey(list);
 try {
 ((HtmlTree) this.tree).queueNodeExpand(key);
 } catch (final IOException e) {
 e.printStackTrace();
 }
 }
 }