Swing / AWT / SWT

tree.setSelectionPath not working

15 views

I have a JTree and to that i have a button called "up" which when clicked moves the node up. I am doing this by deleting the node from its place and adding it one place higher. By doing so, the node highlight is obviously going. I want to add highlight and am using setSelectionPath to do so. But it is not working...

if (e.getSource() == up) {  
            DefaultTreeModel model = (DefaultTreeModel) tree.getModel();  
            TreePath tp = tree.getSelectionPath();  
  
            if (tp == null) {  
                JOptionPane.showMessageDialog(null, "No node selected",  
                        "Error", JOptionPane.ERROR_MESSAGE);  
                return;  
            }  
  
            DefaultMutableTreeNode select = (DefaultMutableTreeNode) tp  
                    .getLastPathComponent();  
            int index = select.getParent().getIndex(select);  
            TreeNode parent = select.getParent();  
  
            if (index != 0) {  
                model.removeNodeFromParent(select);  
  
                MutableTreeNode newNode = new DefaultMutableTreeNode(select);  
  
                model.insertNodeInto(newNode, (MutableTreeNode) parent,  
                        index - 1);  
  
            } else {  
                JOptionPane.showMessageDialog(null,  
                        "Selected node is first node.", "Error",  
                        JOptionPane.ERROR_MESSAGE);  
            }  
  
            Tpane.setFocusable(true);  
            System.out.println(tp.toString());  
            DefaultTreeModel treemodel = (DefaultTreeModel) tree.getModel();  
            TreeNode[] nodes = model.getPathToRoot(select);  
  
            tree.setSelectionPath(new TreePath(nodes));  
  
        }  </div>
  </div>
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