🚀 go-pugleaf

I've tried your suggestion in a test case but I'm not getting a new node
on the screen. Here's the structure:

    public TreeSelExample() 
    {
	// ...
	rootNode = new DefaultMutableTreeNode("Categories");

	// ... two children are added under the parent
	// here's an example for one of them:
	childNode = new DefaultMutableTreeNode("Metals");
	rootNode.add(childNode);

	// ...
	// Then the display is setup and put on the screen,
	// ending the initiation of the tree. So far, so good.
	
The following method is in this class;

     public void valueChanged(TreeSelectionEvent e) {
	chileNode = new DefaultMutableTreeNode("Fluids");        		
rootNode.add(childNode);
	// ...
     }

This method is called on selection of a node in the tree, and here is
where I want to add a new node, as shown. The code compiles, and when
run only shows the first two children. I don't seem to be able to add
the third child, "Fluids", to the tree.

The setVisible(true) has occurred after the initiation and before the
addition. Do I have to refresh the display to get the new node to show?
If so, what refreshes a JTree display?
--------

Jason Burton wrote:
> 
> Leo Cohen wrote in message <3677EF96.BDBE2B67@cs.virginia.edu>...
> >Using JTree, I can succesfully initialize a tree using the default tree
> >model and DefaultMutableTreeNode. After the initialized tree is on the
> >screen, how do I add a new node to the tree?
> 
> You use the methods of the root node (and any child nodes), rather than
> using methods of the JTree itself.  Example:
> 
> DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Root Node");
> JTree myTree = new JTree(rootNode);
> DefaultMutableTreeNode childNode = new DefaultMutableTreeNode("Child Node");
> rootNode.add(childNode);
> 
> See the help on DefaultMutableTreeNode for more methods to manipulate child
> nodes.
> 
> Jason Burton

-- 
Leo Cohen

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