Name: jk109818 Date: 01/11/2002


FULL PRODUCT VERSION :
java version "1.4.0-beta3"

Java(TM) 2 Runtime Environment, Standard Edition (build
1.4.0-beta3-b84)

Java HotSpot(TM) Client VM (build 1.4.0-beta3-b84, mixed
mode)


FULL OPERATING SYSTEM VERSION :
Windows Millennium [Version 4.90.3000]


A DESCRIPTION OF THE PROBLEM :
JTree no longer seems to update its view properly
when adding a node after removing a set of nested
and selected tree nodes.

See steps to reproduce.


REGRESSION. Last worked in version merlin-beta3

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run attached test case

The following things happen:
- A JTree with a DefaultTreeModel is created
- The root node is 'root'
- 'node1' is added to 'root'
- 'node1a' is added to 'node1'
- 'node2' is added to 'root'
- 'node1', 'node1a' and 'node2' are selected
- 'node1' and 'node2' are removed from 'root'
  ('node1a' is implicitly removed too)
- now a new node ('node3') is added to root


EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected result:

'node3' should be visible on the screen (it is in 1.3.1)

Actual result:

'node3' isn't displayed


This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;

public class TreeCase extends JFrame {
  public TreeCase() {
    super("TreeCase");
    
    DefaultMutableTreeNode root = new DefaultMutableTreeNode
("root");
    DefaultTreeModel model = new DefaultTreeModel(root);
    JTree tree = new JTree(model);
    setContentPane(tree);
    
    setSize(new Dimension(608, 384));
    show();
            
    DefaultMutableTreeNode node1 = new
DefaultMutableTreeNode("node1");
    root.add(node1);
    model.nodesWereInserted(root, new int[]{0});
    tree.expandRow(0);
    
    DefaultMutableTreeNode node1a = new
DefaultMutableTreeNode("node1a");
    node1.add(node1a);
    model.nodesWereInserted(node1, new int[]{0});
    tree.expandRow(1);
    
    DefaultMutableTreeNode node2 = new
DefaultMutableTreeNode("node2");
    root.add(node2);
    model.nodesWereInserted(root, new int[]{1});
    
    tree.setSelectionInterval(1, 3);
    
    root.remove(node1);
    root.remove(node2);
    model.nodesWereRemoved(root, new int[]{0, 1}, new Object
[]{node1, node2});
    
    DefaultMutableTreeNode node3 = new
DefaultMutableTreeNode("node3");
    root.add(node3);
    model.nodesWereInserted(root, new int[]{0});
    tree.expandRow(0);
  }
  
  public static void main(String[] args) {
    new TreeCase();
  }
}

---------- END SOURCE ----------

Release Regression From : 1.3.1_02
The above release value was the last known release where this
bug was knwon to work. Since then there has been a regression.

(Review ID: 137837)
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