JTree: Cell Editor takes few click to start editing

I have a JTree and have set the user defined renender and cell editor.
However, user has to click continuously for some time to start the editing operation. How can I start the edit operation immediately after one click only.
TIA
Sachin

((DefaultCellEditor)myTable.getCellEditor()).setClickCountToStart(1);
Remember that a click is a mouse press and release without moving the mouse.

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Focus cell editor component of JTable when starting editing by typing

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Hi,
I have a component where I am placing JTable in JTree node.The table cells should be editable.
I was unable to do that.
I am giving code for 2 classes below,which I used.
To test this compile the classes seperately.
/**************************TableInTree.java(main class)**************/
import java.awt.Component;
import javax.swing.*;
import javax.swing.tree.*;
import java.util.*;
public class TableInTree extends JFrame
public TableInTree()
super("TableInTree");
JTree tree = new JTree(this.createTreeModel());
tree.setCellRenderer(new ResultTreeCellRenderer());
tree.setEditable(true);
this.getContentPane().add(new JScrollPane(tree));
public static void main(String[] args)
TableInTree frame = new TableInTree();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800, 600);
frame.show();
// * Method createRootNodes.
private TreeModel createTreeModel()
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("test1");
node1.add(new DefaultMutableTreeNode(new TableRenderDemo)));
root.add(node1);
root.add(new DefaultMutableTreeNode("test2"));
return new DefaultTreeModel(root, true);
public static class ResultTreeCellRenderer extends DefaultTreeCellRenderer
public Component getTreeCellRendererComponent(JTree t, Object value,boolean s, boolean o,boolean l, int r, boolean h)
if (value instanceof DefaultMutableTreeNode)
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
if (node.getUserObject() instanceof TableRenderDemo)
return new JScrollPane((TableRenderDemo) node.getUserObject());
return super.getTreeCellRendererComponent(t, value, s, o, l, r, h);
/*******************TreeRenderDemo.java**************************/
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.table.*;
import java.awt.*;
* TableRenderDemo is just like TableDemo, except that it
* explicitly initializes column sizes and it uses a combo box
* as an editor for the Sport column.
public class TableRenderDemo extends JPanel {
private boolean DEBUG = false;
public TableRenderDemo() {
super(new GridLayout(1,0));
JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Set up column sizes.
initColumnSizes(table);
//Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table, table.getColumnModel().getColumn(2));
//Add the scroll pane to this panel.
add(scrollPane);
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
private void initColumnSizes(JTable table) {
MyTableModel model = (MyTableModel)table.getModel();
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
TableCellRenderer headerRenderer =
((JTableHeader)table.getTableHeader()).getDefaultRenderer();
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
comp = headerRenderer.getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues,
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(JTable table,
TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Knitting");
comboBox.addItem("Speed reading");
comboBox.addItem("Pool");
comboBox.addItem("None of the above");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
public final Object[] longValues = {"Sharon", "Campione",
"None of the above",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[j]);
System.out.println();
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
private static void createAndShowGUI() {
//Make sure we have nice window decorations.
//JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("TableRenderDemo");
//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TableRenderDemo newContentPane = new TableRenderDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
Please give me a solution.
thanks in advance

rebounce

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take there:
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When starting Visual Studio on my machine it used to take a few seconds to start up and be ready to either open or create a new project. Recently however I am finding that it is hanging - stuck on "Updating the News Channel" and "Connecting
to " Visual studio Online. It remains unresponsive until these actions are completed. I have a fast internet connection and a fast computer with solid state drive. I have not experienced any issues browsing using IE or using other applications.
Is there any suggestion that can help improve this situation?
This is the version and installed packages. I am using Windows 8.1 Professional 64Bit
Microsoft Visual Studio Professional 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.5.51650
Installed Version: Professional
LightSwitch for Visual Studio 2013   06177-004-0446034-02169
Microsoft LightSwitch for Visual Studio 2013
Team Explorer for Visual Studio 2013   06177-004-0446034-02169
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Visual Studio 2013 Code Analysis Spell Checker   06177-004-0446034-02169
Microsoft® Visual Studio® 2013 Code Analysis Spell Checker
Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.
The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.
Windows Phone SDK 8.0 - ENU   06177-004-0446034-02169
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Hi Sal_S,
>>Recently however I am finding that it is hanging - stuck on "Updating the News Channel" and "Connecting to " Visual studio Online. It remains unresponsive until these actions are completed.
What does "Updating the news Channel" mean? You mean that open the VS IDE, and then some links or videos showed in the start page.
Maybe you could change some settings in your VS IDE under TOOLS->Options.
As you said that the VS hanging when it connected to VSO, one idea is that you could post an issue to the VSO forum:
https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?forum=TFService
In addition, for the performance issue, we would think about many elements.
For example, the machine configurations, run the VS for a long time(we often restart the VS), the temp files(clean them), or the add-ins or extension tools (you could disable them), the third party processes in your task manager which make the CPU is high
or others.
Best Regards,
Jack
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.

Using a JPanel as cell editor in JTable

I have a composite component (JPanel that contains a JTextField and a
JButton) that I would like to use as the a cell editor in a JTable.The JButton instantiates a UI editor component that I have designed. Example would be date editor for dates, tet editor for strings etc. This editor allows the user to select a date to populate the JTextField (the date may also be manually entered).
I have no problem with the rendering of the component within the table.However, I would like for the JTextField embedded within the JPanel to receive focus and a visible caret, when using the tab key to navigate to the cell. After reading through some of the posts here , I was able to transfer the focus. But I dont see a visible caret. I am unable to edit. I have to click on the text box and then start typing. Its a great pain in the ass.
I have a custom designed table and custom designed editor. Code is attached...
<pre>
protected boolean processKeyBinding(KeyStroke ks, KeyEvent e,int condition, boolean pressed) {
final int selRow = getSelectedRow();
final int rowCount = getRowCount();
final int selCol = getSelectedColumn();
final EventObject obj = (EventObject) e;
if (selRow == -1) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
changeSelection(0, 1, false, false);
editCellAt(0, 1, obj);
boolean isSelected = false;
if ((ks == KeyStroke.getKeyStroke(KeyEvent.VK_TAB,0)) ||
(ks == KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,0))) {
if (selCol == 1) {
isSelected= getCellEditor(selRow,selCol).stopCellEditing();
targetRow = (selRow + 1) % rowCount;
SwingUtilities.invokeLater(new Runnable() {
public void run() {
if (editCellAt(targetRow, 1, obj)) {
changeSelection(targetRow, 1, false, false);
getComponentAt(targetRow, 1).requestFocus();
} else {
getCellEditor(selRow, selCol).shouldSelectCell(obj);
return super.processKeyBinding(ks,e,condition,pressed);
</pre>
Relevant code of my custom editor is below....
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
lastEditedRow = row;
lastEditedCol = column;
lastEditedTable = table;
lastEditedValue = value;
val = value;
((JTextField)editorComponent).
setText(val == null ? "" : val.toString());
setClickCountToStart(1);
if (value instanceof CycCollectionChooserModel) {
String collection = ((CycCollectionChooserModel)value).
getCollection().cyclify();
button.setVisible(EditorForCollectionMap.hasUIEditor(collection));
button.setMargin (new Insets (1,1,1,1));
button.setIconTextGap(0);
buttonListener.model = (CycCollectionChooserModel)value;
buttonListener.rowIndex = row;
buttonListener.localTable = table;
return panel;
public boolean isCellEditable(EventObject evt) {
if (evt instanceof MouseEvent) {
int clickCount;
clickCount = 1;
return ((MouseEvent)evt).getClickCount() >= clickCount;
return super.isCellEditable(evt);
public boolean stopCellEditing() {
if (super.stopCellEditing()) {
final int targetRow = (lastEditedRow+1)%lastEditedTable.getRowCount();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
lastEditedTable.changeSelection(targetRow, 1, false, false);
lastEditedTable.getComponentAt(targetRow, 1).requestFocus();
return true;
return false;
Does any one know why I am not able to see the caret? Any insights you have will be most welcome.
Thanks in advance,
Praveen.

Almost solved the problem. Navigation through Tab key, up/ down arrow, Enter key works for text boxes. Navigation through Tab Key, Up/down arrow works for combo boxes. But for "Enter" key it doesnt. Changes in code ....
(I have added a key listener to my editor class)
<pre>
protected boolean processKeyBinding(KeyStroke ks, KeyEvent e,int condition, boolean pressed) {
final int selRow = getSelectedRow();
final int rowCount = getRowCount();
final int selCol = getSelectedColumn();
final EventObject obj = (EventObject) e;
if (selRow == -1) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
changeSelection(0, 1, false, false);
editCellAt(0, 1, obj);
boolean isSelected = false;
if ((ks == KeyStroke.getKeyStroke(KeyEvent.VK_TAB,0)) ||
(ks == KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,0)) ||
(ks == KeyStroke.getKeyStroke(KeyEvent.VK_DOWN,0))) {
if (selCol == 1) {
final int targetRow = (selRow + 1) % rowCount;
getCellEditor(selRow,selCol).stopCellEditing();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
editCellAt(targetRow, 1, obj);
changeSelection(targetRow, 1, false, false);
getComponentAt(targetRow, 1).requestFocus();
if ((ks == KeyStroke.getKeyStroke(KeyEvent.VK_UP,0))||
(ks == KeyStroke.getKeyStroke(KeyEvent.VK_TAB,1))) {
if (selCol == 1) {
final int targetRow = (selRow - 1) % rowCount;
getCellEditor(selRow,selCol).stopCellEditing();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
editCellAt(targetRow, 1, obj);
changeSelection(targetRow, 1, false, false);
getComponentAt(targetRow, 1).requestFocus();
return super.processKeyBinding(ks,e,condition,pressed);
public class FactEditorComboBoxTableEditor extends DefaultCellEditor implements KeyListener{
//// Constructors
/** Creates a new instance of FactEditorComboBoxTableEditor. */
public FactEditorComboBoxTableEditor(JComboBox comboBox) {
super(comboBox);
JTextField TF =(JTextField)((ComboBoxEditor)comboBox.getEditor()).
getEditorComponent();
TF.addKeyListener(this);
public class FactEditorComboBoxTableEditor extends DefaultCellEditor implements KeyListener{
//// Constructors
/** Creates a new instance of FactEditorComboBoxTableEditor. */
public FactEditorComboBoxTableEditor(JComboBox comboBox) {
super(comboBox);
JTextField TF =(JTextField)((ComboBoxEditor)comboBox.getEditor()).
getEditorComponent();
TF.addKeyListener(this);
</pre>
P.S : viravan, help me solve this problem and you will get the rest of the dukes LOL

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

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

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.

JTree: Cell Editor takes few click to start editing

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