How can I persist all changes I made to these edited leaves and nodes?

Override the valueForPathChanged method of your TreeModel and do the following.You may also want to set the userObject of your TreeNode with the new value.

Let me know if this helps...

public void valueForPathChanged(TreePath path, Object newValue)

{

super.valueForPathChanged(path, newValue);

TreeNode aNode = (TreeNode)path.getLastPathComponent();

((MutableTreeNode)aNode).setUserObject(newValue);

nodeChanged(aNode);

}

cantrya at 2007-7-12 0:13:34 >

Hi, Cantry, Thanks for your help.

I add your code as follows:

import java.awt.BorderLayout;

import java.util.EventObject;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTree;

import javax.swing.JTree.*;

import javax.swing.tree.*;

import javax.swing.tree.DefaultTreeCellEditor;

import javax.swing.tree.DefaultTreeCellRenderer;

import javax.swing.tree.TreeCellEditor;

import javax.swing.tree.TreeNode;

public class EditLeafSample {

public static void main(String args[]) {

JFrame frame = new JFrame("Editable Tree");

JTree tree = new JTree();

tree.setEditable(true);

DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();

TreeCellEditor editor = new LeafCellEditor(tree, renderer);

tree.setCellEditor(editor);

JScrollPane scrollPane = new JScrollPane(tree);

frame.getContentPane().add(scrollPane, BorderLayout.CENTER);

frame.setSize(300, 150);

frame.setVisible(true);

}

}

class LeafCellEditor extends DefaultTreeCellEditor {

public LeafCellEditor(JTree tree, DefaultTreeCellRenderer renderer) {

super(tree, renderer);

}

public LeafCellEditor(JTree tree, DefaultTreeCellRenderer renderer,

TreeCellEditor editor) {

super(tree, renderer, editor);

}

public void valueForPathChanged(TreePath path, Object newValue)

{

super.valueForPathChanged(path, newValue);

TreeNode aNode = (TreeNode)path.getLastPathComponent();

((MutableTreeNode)aNode).setUserObject(newValue);

nodeChanged(aNode);

}

public boolean isCellEditable(EventObject event) {

// Get initial setting

boolean returnValue = super.isCellEditable(event);

// If still possible, check if current tree node is a leaf

if (returnValue) {

Object node = tree.getLastSelectedPathComponent();

if ((node != null) && (node instanceof TreeNode)) {

TreeNode treeNode = (TreeNode) node;

returnValue = treeNode.isLeaf();

}

}

return returnValue;

}

}

but following lines show red,

super.valueForPathChanged(path, newValue);

and

nodeChanged(aNode);

can you help more?

Thanks

sunny

sunnymanmana at 2007-7-12 0:13:34 >

Dear Sir, thanks,

I implements the interface TreeModel already, I have following code:

public void valueForPathChanged(TreePath path, Object newValue)

{

valueForPathChanged(path, newValue);

TreeNode aNode = (TreeNode)path.getLastPathComponent();

((MutableTreeNode)aNode).setUserObject(newValue);

nodeChanged(aNode);

}

but line nodeChanged still red, can you help tell where is this nodeChanged (aNode) available?

Thanks

sunny

sunnymanmana at 2007-7-12 0:13:34 >