Small issue with custom table cell editor and unwanted table row selection

Question

I'm using a custom table cell editor to display a JTree. Thing i notice is that when i select a value in the tree pop-up, the pop-up closes (as it should) but then every table row, from the editing row to the row behind the pop-up when i selected the value becomes highlighted. I'm thinking this is a focus issue, but it thought i took care of that. To clairfy, look at this: Before . Notice how the "Straightening" tree item is roughly above the "Stock Thickness" table row? When i select Straightening, this is what happens to my table: After .
My TreeComboBox component:
public class TreeComboBox extends JPanel implements MouseListener {
    private JTextField itemField;
    private TreeModel treeModel;
    private ArrayList<ActionListener> actionListeners = new ArrayList<ActionListener>();
    private Object selectedItem;
     * Creates a new <code>TreeComboBox</code> instance.
     * @param treeModel the tree model to be used in the drop-down selector.
    public TreeComboBox(TreeModel treeModel) {
        this(treeModel, null);
     * Creates a new <code>TreeComboBox</code> instance.
     * @param treeModel the tree model to be used in the drop-down selector.
     * @param selectedItem tree will expand and highlight this item.
    public TreeComboBox(TreeModel treeModel, Object selectedItem) {
        this.treeModel = treeModel;
        this.selectedItem = selectedItem;
        initComponents();
     * Returns the current drop-down tree model.
     * @return the current <code>TreeModel</code> instance.
    public TreeModel getTreeModel() {
        return treeModel;
     * Sets the tree model.
     * @param treeModel a <code>TreeModel</code> instance.
    public void setTreeModel(TreeModel treeModel) {
        this.treeModel = treeModel;
     * Returns the selected item from the drop-down selector.
     * @return the selected tree object.
    public Object getSelectedItem() {
        return selectedItem;
     * Sets the selected item in the drop-down selector.
     * @param selectedItem tree will expand and highlight this item.
    public void setSelectedItem(Object selectedItem) {
        this.selectedItem = selectedItem;
        String text = selectedItem != null ? selectedItem.toString() : "";
        itemField.setText(text);
        setToolTipText(text);
     * Overridden to enable/disable all child components.
     * @param enabled flat to enable or disable this component.
    public void setEnabled(boolean enabled) {
        itemField.setEnabled(enabled);
        super.setEnabled(enabled);
    public void addActionListener(ActionListener listener) {
        actionListeners.add(listener);
    public void removeActionListener(ActionListener listener) {
        actionListeners.remove(listener);
    // MouseListener implementation
    public void mouseClicked(MouseEvent e) {
    public void mouseEntered(MouseEvent e) {
    public void mouseExited(MouseEvent e) {
    public void mousePressed(MouseEvent e) {
    public void mouseReleased(MouseEvent e) {
        showPopup();
    private void initComponents() {
        setLayout(new GridBagLayout());
        itemField = new JTextField();
        itemField.setEditable(false);
        itemField.setText(selectedItem != null ? selectedItem.toString() : "");
        itemField.addMouseListener(this);
        add(itemField, new GridBagConstraints(0, 0, 1, 1, 1.0, 0.0,
                GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
    private void showPopup() {
        final TreePopup popup = new TreePopup();
        final TreeComboBox tcb = this;
        final int x = itemField.getX();
        final int y = itemField.getY() + itemField.getHeight();
        int width = itemField.getWidth() + popupButton.getWidth();
        Dimension prefSize = popup.getPreferredSize();
        prefSize.width = width;
        popup.setPreferredSize(prefSize);
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                popup.show(tcb, x, y);
                popup.requestFocusInWindow();
    private void fireActionPerformed() {
        ActionEvent e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, "TreeComboBoxSelection");
        for (ActionListener listener : actionListeners) {
            listener.actionPerformed(e);
    private class TreePopup extends JPopupMenu {
        private JTree tree;
        private JScrollPane scrollPane;
        public TreePopup() {
            initComponents();
            initData();
        private void initData() {
            if (treeModel != null) {
                tree.setModel(treeModel);
        private void initComponents() {
            setFocusable(true);
            setFocusCycleRoot(true);
            tree = new JTree();
            tree.setRootVisible(false);
            tree.setShowsRootHandles(true);
            tree.setFocusable(true);
            tree.setFocusCycleRoot(true);
            tree.addTreeSelectionListener(new TreeSelectionListener() {
                public void valueChanged(TreeSelectionEvent e) {
                    tree_valueChanged(e);
            scrollPane = new JScrollPane(tree);
            add(scrollPane);
        private void tree_valueChanged(TreeSelectionEvent e) {
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
            setSelectedItem(node.getUserObject());
            fireActionPerformed();
            this.setVisible(false);
}My TreeComboBoxTableCellEditor:
public class TreeComboBoxTableCellEditor extends AbstractCellEditor implements TableCellEditor, ActionListener {
    protected TreeComboBox treeComboBox;
    protected ArrayList<CellEditorListener> cellEditorListeners = new ArrayList<CellEditorListener>();
    public TreeComboBoxTableCellEditor(TreeComboBox treeComboBox) {
        this.treeComboBox = treeComboBox;
        treeComboBox.addActionListener(this);
    public Object getCellEditorValue() {
        return treeComboBox.getSelectedItem();
    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
        treeComboBox.setSelectedItem(value);
        return treeComboBox;
    public void actionPerformed(ActionEvent e) {
        stopCellEditing();
}Any thoughts?
Edited by: MiseryMachine on Apr 3, 2008 1:21 PM
Edited by: MiseryMachine on Apr 3, 2008 1:27 PM

Answer 1

As I said, you have to have empty context elements before additional rows will be open for input.
For instance if you want to start with 5 rows available for input do the following to your internal table that you will bind:
data itab type standard table of sflight.
do 5 times.
  append initial line to itab.
enddo.
context_node->bind_table( itab ).
The other option if you need n number of rows is to add a button to the table toolbar for adding more rows. When this button is pressed, you add a new context element to the node - thereby creating a new empty row in the table.