JTree, dont collapse any node

Hi,
My JTree works well when it it first loaded. ie. the branches are not being expanded out.
After navigating it, its expanded. How do i close all the branches(Make it look like it was just instianted) w/o instianting the JTree again?
Thanks.

Google "jtree collapse all"

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Tree error, after Expand All, then collapsing any node, ORA-6502/6512

Has anyone seen this problem with the Tree?
Normal Tree mode works great, can expand and collapse nodes with no problem.
I can Expand All, Collapse All, and Reset Tree without problems.
However, if I select Expand All, and then try to collapse any node, I get this error.
Unexpected error ORA-06502: PL/SQL: numeric or value error: character string buffer too small ORA-06512: at line 1
My database is 9.2.0.4, and there are 1,138 records in my tree table, with id NUMBER(8), pid NUMBER(8), and name VARCHAR2(100).
my tree query is:
select "ID" id,
"PID" pid,
"NAME" name,
'f?p=150:2:&SESSION.::NO::P2_PARAM_ID:'||"ID" link,
null a1,
null a2
from "#OWNER#"."PARAM_TREE"
order by 3
My root tree query is:select "ID" id, "PID" pid, "NAME" name, null link, null a1, null a2 from "#OWNER#"."PARAM_TREE" where id=0
I checked the link to collapse, it was the same in normal mode or Expand All:http://umbriel.xxx.com:7777/pls/EDIWS_GUI_DEV/f?p=150:1:9757663040679228582:CONTRACT,69
Any ideas, I searched in the forum, saw something on 9.2.0.6 that sounded similar, but it was specific to 9.2.0.6, not 9.2.0.4..
Thanks, Joe

Hi all,
I have created a tree with over 20000 entries but I dont know how many nodes there are. I am using APEX 3.0.1.
Whenever EXPAND ALL ist pressed I am getting this error:
Unexpected error ORA-06502: PL/SQL: numeric or value error: character string buffer too small.
I am also using DIV together with javascript in the tree region so that the selected node is always on top of the page.
like you mentioned. Does this seem like a bug too you?
Regards,
Denise

Reload JTree and keep expanded nodes

Hi all,
I have spent some time looking around on this, found some useful stuff, but I still cannot seem to get a result.
Here is my situation:
I have a JTree for a GUI desktop app. I build the tree from a database file. The user has the ability to refresh the tree to keep it in sync with any database changes. The problem is that when I refresh, all the nodes that were previously expanded are now collapsed again.
Having looked around, I have seen a lot of JTree.expandRow() answers, but I don't want to use expandRow, as the rows will changes according to any db changes.
I thought a good solution would be to trap any expand or collapse events and for each either add or remove the TreePath for the relevant node onto a List. When the users refreshes the tree, I thought I could run through the list and expand any TreeNodes I find. I also found someone advocating such an approach in another thread. BUT - it doesn't work for me Here is the code for my refresh. Any help/advice, greatly appreciated.
Thanks in advance,
Steve
private void refreshBrowser(){
        System.out.println("Refresh browser - Started");
        rootTreeNode.removeAllChildren(); // remove all nodes from root
        loadBrowserData(); // This method loads nodes from a database
         Iterator<TreePath> TPI = objectTreePaths.iterator(); // run throught my saved paths
        while (TPI.hasNext()) {
            TreePath yTreePath = TPI.next();
            browserTree.expandPath(yTreePath); // Expand each found path
        treeModel.reload(); // model changed - reload it.
        System.out.println("Refresh browser - Complete");
    }

Here is my situation:
I have a JTree for a GUI desktop app. I build the
tree from a database file. The user has the ability
to refresh the tree to keep it in sync with any
database changes. The problem is that when I refresh,
all the nodes that were previously expanded are now
collapsed again.
Having looked around, I have seen a lot of
JTree.expandRow() answers, but I don't want to use
expandRow, as the rows will changes according to any
db changes.you could use:
JTee.scrollPathToVisible(path);
Where path is obtained in this way from a DefaultMutableTreeNode (TreeNode):
TreePath path = new TreePath(((DefaultMutableTreeNode)node).getPath());
I thought a good solution would be to trap any expand
or collapse events and for each either add or remove
the TreePath for the relevant node onto a List. When
the users refreshes the tree, I thought I could run
through the list and expand any TreeNodes I find. I
also found someone advocating such an approach in
another thread. BUT - it doesn't work for me When you perform a JTree.reload() call, it will collapse each node.
My advice is to call JTree.reload() and then call JTree.scrollPathToVisible(path) for each TreeNode previously expanded.
Hope this can help,
regards

JTree adding to expanded nodes

Hey,
I'm writing a program that contains a JTree with two parent nodes and child nodes that are added/removed on demand.
Basically I can't add child nodes while the parent node is expanded. Following the code it actually does add it, just does not update the display.
I've tried validate/repaint/anything I could find that may be of some help with no luck.
Any ideas?
Thanks in advance :)

What do you think about the library I created which
addresses this issue?
Denis Krukovsky
http://dotuseful.sourceforge.net/
I looked at your site and spent 20 minutes trying to figure out why your classes are useful. It's not at all clear why someone should use them. I also looked over your previous posts, but you never seem to explain why someone should use them.

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JTree, dont collapse any node

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