JTable Custom Cell Event handling
Hi,
I have a column in JTable as image which is rendered by using custom cell renderer. I want to handle action event for the cell...
I tried adding actionPerformed event for the button using which the image is rendered but the event is not triggered....
Can you please tell me how to proceed with this
Thanks,
S.Anand
I'm assuming you want to know when the user has clicked on a particular cell in the table. If so, add a MouseListener to the table then implement a MouseListener or one of the Mouse...Adapter classes with the method:
public void mouseClicked(MouseEvent e)
Point p = e.getPoint();
int row = table.rowAtPoint(p);
int col = table.columnAtPoint(p);
// now do something according to the cell that was clicked
Similar Messages
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Htp.p doesn't work from the custom button event handler ...
Hi,
I am trying to pop up an alert from the custom button event handler. I created a button and put the following code.
htp.p('<script language='JavaScript1.3">
alert ("Test Message");
</script>;
But alter doesn't show up after clicking the button.
ThanksOK i've attached them and copy/pasted the relevent parts. The parent window is the SFLB file.
-----------------------------------------here's the code in the parent window
private function editServerPool():
void
serverPoolPUW = PopUpManager.createPopUp(
this,popups.ServerPoolPopup,true);PopUpManager.centerPopUp(serverPoolPUW
as IFlexDisplayObject);
if (newServerPool.SecondarySPAlgorithm != null){
serverPoolPUW.enableSSCheckBox.selected =true;serverPoolPUW.DisplaySecondaryServerPool();
serverPoolPUW.bigResize.play();// serverPoolPUW.height = 602; //yes...i know i need to move thisserverPoolPUW.switchoverPolicyCB.selectedItem = newServerPool.SwitchOverPolicy;
serverPoolPUW.switchoverThresholdTI.text = newServerPool.SwitchOverThreshold;
----------------------here's the code in teh popup window (popups.ServerPoolPopup.mxml)
<mx:Resize id = "bigResize" heightFrom="506" heightTo="602" target="{this}" />
<mx:Resize id = "littleResize" heightFrom="602" heightTo="506" target="{this}"/>
public function DisplaySecondaryServerPool():void{
//make the screen large if the secondary server checkbox is selected; otherwise small.
if (enableSSCheckBox.selected){
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//note that we cannot attach a data provider to the data grid until the grid creation is
//completed. This is done in an event handler.secondaryPanel.enabled =
true; switchoverPolicyCB.visible =
true;switchoverThresholdTI.visible =
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else
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Event Handling in JTable Custom Cell Renderer
I have a JLabel as a custom cell Renderer for a column. I want to handle mouse click event for the JLabel rendered in the cell.
I tried adding the listener for the label in the custom cell renderer but it is not working. Any ideas how to handle this problem??
Thanks
S.AnandIf you want to handle the selection of a tree node
1) write a class like:
public class TreePaneListener implements TreeSelectionListener {
// TREE SELECTION LISTENER
public void valueChanged(TreeSelectionEvent e) {
JTree tree = (JTree)e.getSource();
DefaultMutableTreeNode node = null;
int count = 0;
boolean doSomething = false;
if(tree.getSelectionCount() > 1) {
TreePath[] selection = tree.getSelectionPaths();
int[] temp = new int[selection.length];
for(int i =0; i < selection.length; i++) {
// Check each node for selection
node = (DefaultMutableTreeNode)selection.getLastPathComponent();
if(node.getLevel()==2) {
// Change this code to take the action desired
doSomething = true;
2) After creating the tree register the listener
TreePaneListener handler = new TreePaneListener();
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JTable custom cell editor losing focus
This is a followup to Re: Tutorial on AWT/Swing control flow wherein I ask for pointers to help me understand the source of focus-loss behaviour in my JTable's custom cell editor.
I have done some more investigations and it turns out that the focus loss is a more general problem with custom cell editors which call other windows. Even the color-picker demo in the JTable tutorial at http://download.oracle.com/javase/tutorial/uiswing/examples/components/index.html#TableDialogEditDemo has this problem, IF you add a text field or two to the layout BEFORE the table. The only reason the table in the demo doesn't lose the focus when the color-picker comes out is because the table is the only thing in the window!
Here is the demo code, augmented with two text fields, which are admittedly ugly here but which serve the desired purpose:
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TableDialogEditDemo extends JPanel {
public class ColorEditor extends AbstractCellEditor
implements TableCellEditor,
ActionListener {
Color currentColor;
JButton button;
JColorChooser colorChooser;
JDialog dialog;
protected static final String EDIT = "edit";
public ColorEditor() {
//Set up the editor (from the table's point of view), which is a button.
//This button brings up the color chooser dialog, which is the editor from the user's point of view.
button = new JButton();
button.setActionCommand(EDIT);
button.addActionListener(this);
button.setBorderPainted(false);
//Set up the dialog that the button brings up.
colorChooser = new JColorChooser();
dialog = JColorChooser.createDialog(button, "Pick a Color", true, //modal
colorChooser, this, //OK button handler
null); //no CANCEL button handler
* Handles events from the editor button and from the dialog's OK button.
public void actionPerformed(ActionEvent e) {
if (EDIT.equals(e.getActionCommand())) {
//The user has clicked the cell, so bring up the dialog.
button.setBackground(currentColor);
colorChooser.setColor(currentColor);
dialog.setVisible(true);
//Make the renderer reappear.
fireEditingStopped();
} else { //User pressed dialog's "OK" button
currentColor = colorChooser.getColor();
public Object getCellEditorValue() {
return currentColor;
public Component getTableCellEditorComponent(JTable table,
Object value,
boolean isSelected,
int row,
int column) {
currentColor = (Color) value;
return button;
public class ColorRenderer extends JLabel
implements TableCellRenderer {
Border unselectedBorder = null;
Border selectedBorder = null;
boolean isBordered = true;
public ColorRenderer(boolean isBordered) {
this.isBordered = isBordered;
setOpaque(true);
public Component getTableCellRendererComponent(
JTable table, Object color,
boolean isSelected, boolean hasFocus,
int row, int column) {
Color newColor = (Color) color;
setBackground(newColor);
if (isBordered) {
if (isSelected) {
if (selectedBorder == null) {
selectedBorder = BorderFactory.createMatteBorder(2, 5, 2, 5,
table.getSelectionBackground());
setBorder(selectedBorder);
} else {
if (unselectedBorder == null) {
unselectedBorder = BorderFactory.createMatteBorder(2, 5, 2, 5,
table.getBackground());
setBorder(unselectedBorder);
return this;
public TableDialogEditDemo() {
super(new GridLayout());
JTextField tf1 = new JTextField("tf1");
add(tf1);
JTextField tf2 = new JTextField("tf2");
add(tf2);
JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
JScrollPane scrollPane = new JScrollPane(table);
table.setDefaultRenderer(Color.class,
new ColorRenderer(true));
table.setDefaultEditor(Color.class,
new ColorEditor());
add(scrollPane);
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Favorite Color",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Mary", new Color(153, 0, 153),
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", new Color(51, 51, 153),
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", new Color(51, 102, 51),
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", Color.red,
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", Color.pink,
"Pool", new Integer(10), new Boolean(false)}
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];
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
public boolean isCellEditable(int row, int col) {
if (col < 1) {
return false;
} else {
return true;
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
private static void createAndShowGUI() {
JFrame frame = new JFrame("TableDialogEditDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent newContentPane = new TableDialogEditDemo();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}When you come back from choosing a color, tf1 is given the focus, instead of the table. This is because bringing the color picker window to the front causes a focus lost event for the cell editor component; it's temporary, as it should be, so why on earth is the system losing track of who has focus in the window??
I see the following in Window#getMostRecentFocusOwner():
public Component getMostRecentFocusOwner()
if (isFocused())
return getFocusOwner();
else
Component mostRecent =
KeyboardFocusManager.getMostRecentFocusOwner(this);
if (mostRecent != null)
return mostRecent;
else
return (isFocusableWindow())
? getFocusTraversalPolicy().getInitialComponent(this)
: null;
}My app has a custom focus traversal policy, so I'm able to see who is being called, and indeed, getInitialComponent() is being called. Clearly, the KeyboardFocusManager is actually losing track of the fact that the table was focussed at the point where control was transferred to the color picker! This strikes me as completely unreasonable, especially since, as noted, this is a temporary focus loss event, not a permanent one.
I'd be grateful for any wisdom in solving this, since similar behaviour to this little demo -- without focus loss, naturally -- is an essential part of my application.Looks like it is because the 'restore-focus-to-previous-after-modal-dialog-close' is in a later event than when the control returns to the action performed (which I guess makes sense: it continues the action event handler and the focus events are handled later, but I needed two chained invoke laters so it might also be that the OS events comes later).
The following works for me (in the actionPerformed edited):
// create the dialog here so it is correctly parented
// (otherwise sometimes OK button not correctly the default button)
dialog = JColorChooser.createDialog(button, "Pick a Color", true, //modal
colorChooser, this, //OK button handler
null); //no CANCEL button handler
//The user has clicked the cell, so bring up the dialog.
button.setBackground(currentColor);
colorChooser.setColor(currentColor);
button.addFocusListener(new FocusListener() {
@Override
public void focusLost(FocusEvent e) {}
@Override
public void focusGained(FocusEvent e) {
// dialog closed and focus restored
button.removeFocusListener(this);
fireEditingStopped();
dialog.setVisible(true);but a simpler request might be better (althoug I still need an invoke later):
// rest as before except the FocusListener
dialog.setVisible(true);
button.requestFocusInWindow();
EventQueue.invokeLater(new Runnable() {
public void run() {
fireEditingStopped();
});And a quick fix to the renderer so you can actualy see the focus on it:
if(hasFocus) {
Border border = DefaultLookup.getBorder(this, ui, "Table.focusCellHighlightBorder");
setBorder(BorderFactory.createCompoundBorder(
border, BorderFactory.createMatteBorder(1, 4, 1, 4,
((MatteBorder) getBorder()).getMatteColor())));
} -
Swing: when trying to get the values from a JTable inside an event handler
Hi,
I am trying to write a graphical interface to compute the Gauss Elimination procedure for solving linear systems. The class for computing the output of a linear system already works fine on console mode, but I am fighting a little bit to make it work with Swing.
I put two buttons (plus labels) and a JTextField . The buttons have the following role:
One of them gets the value from the JTextField and it will be used to the system dimension. The other should compute the solution. I also added a JTable so that the user can type the values in the screen.
So whenever the user hits the button Dimensiona the program should retrieve the values from the table cells and pass them to a 2D Array. However, the program throws a NullPointerException when I try to
do it. I have put the code for copying this Matrix inside a method and I call it from the inner class event handler.
I would thank you very much for the help.
Daniel V. Gomes
here goes the code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import AdvanceMath.*;
public class MathF2 extends JFrame {
private JTextField ArrayOfFields[];
private JTextField DimOfSis;
private JButton Calcular;
private JButton Ativar;
private JLabel label1;
private JLabel label2;
private Container container;
private int value;
private JTable DataTable;
private double[][] A;
private double[] B;
private boolean dimensionado = false;
private boolean podecalc = false;
public MathF2 (){
super("Math Calcs");
Container container = getContentPane();
container.setLayout( new FlowLayout(FlowLayout.CENTER) );
Calcular = new JButton("Resolver");
Calcular.setEnabled(false);
Ativar = new JButton("Dimensionar");
label1 = new JLabel("Clique no bot�o para resolver o sistema.");
label2 = new JLabel("Qual a ordem do sistema?");
DimOfSis = new JTextField(4);
DimOfSis.setText("0");
JTable DataTable = new JTable(10,10);
container.add(label2);
container.add(DimOfSis);
container.add(Ativar);
container.add(label1);
container.add(Calcular);
container.add(DataTable);
for ( int i = 0; i < 10 ; i ++ ){
for ( int j = 0 ; j < 10 ; j++) {
DataTable.setValueAt("0",i,j);
myHandler handler = new myHandler();
Calcular.addActionListener(handler);
Ativar.addActionListener(handler);
setSize( 500 , 500 );
setVisible( true );
public static void main ( String args[] ){
MathF2 application = new MathF2();
application.addWindowListener(
new WindowAdapter(){
public void windowClosing (WindowEvent event)
System.exit( 0 );
private class myHandler implements ActionListener {
public void actionPerformed ( ActionEvent event ){
if ( event.getSource()== Calcular ) {
if ( event.getSource()== Ativar ) {
//dimensiona a Matriz A
if (dimensionado == false) {
if (DimOfSis.getText()=="0") {
value = 2;
} else {
value = Integer.parseInt(DimOfSis.getText());
dimensionado = true;
Ativar.setEnabled(false);
System.out.println(value);
} else {
Ativar.setEnabled(false);
Calcular.setEnabled(true);
podecalc = true;
try {
InitValores( DataTable, value );
} catch (Exception e) {
System.out.println("Erro ao criar matriz" + e );
private class myHandler2 implements ItemListener {
public void itemStateChanged( ItemEvent event ){
private void InitValores( JTable table, int n ) {
A = new double[n][n];
B = new double[n];
javax.swing.table.TableModel model = table.getModel();
for ( int i = 0 ; i < n ; i++ ){
for (int j = 0 ; j < n ; j++ ){
Object temp1 = model.getValueAt(i,j);
String temp2 = String.valueOf(temp1);
A[i][j] = Double.parseDouble(temp2);What I did is set up a :
// This code will setup a listener for the table to handle a selection
players.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ListSelectionModel rowSM = players.getSelectionModel();
rowSM.addListSelectionListener(new Delete_Player_row_Selection(this));
//Class will take the event and call a method inside the Delete_Player object.
class Delete_Player_row_Selection
implements javax.swing.event.ListSelectionListener
Delete_Player adaptee;
Delete_Player_row_Selection (Delete_Player temp)
adaptee = temp;
public void valueChanged (ListSelectionEvent listSelectionEvent)
adaptee.row_Selection(listSelectionEvent);
in the row_Selection function
if(ex.getValueIsAdjusting()) //To remove double selection
return;
ListSelectionModel lsm = (ListSelectionModel) ex.getSource();
if(lsm.isSelectionEmpty())
System.out.println("EMtpy");
else
int selected_row = lsm.getMinSelectionIndex();
ResultSetTableModel model = (ResultSetTableModel) players.getModel();
String name = (String) model.getValueAt(selected_row, 1);
Integer id = (Integer) model.getValueAt(selected_row, 3);
This is how I got info out of a table when the user selected it -
JTable Custom Cell Editor "focus through keyboard" question (SSCCE included
I was trying to use two components in a table cell. The first was JTextField and second the JButton. Everything works fine, except when it comes to editing the JTextfield using keyboard instead of mouse. When I use tab key to go to the custom cell, I can see that the focus is on the cell (as can be visible from background color). But when I try to edit the cell using F2 or directly entering text, nothing gets entered. If I use the mouse to go to particular cell, it works fine. Here is SSCCE. Try the following.
1. Use mouse key to select first cell for editing. Edit the cell. Everything normal.
2. Use the tab key to go to the first cell. Try to edit cell either by entering directly for after using F2. Can't get the typed text into the JTextfield.
package com.ns;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
public class TextButtonCellFrame extends javax.swing.JFrame {
// Variables declaration - do not modify
private JScrollPane jScrollPane1;
private JPanel testPanel;
private JTable testTable;
// End of variables declaration
public TextButtonCellFrame() {
initComponents();
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
testPanel = new JPanel();
jScrollPane1 = new JScrollPane();
testTable = new JTable();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
testTable.setModel(new DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
testTable.setRowHeight(20);
testTable.getColumnModel().getColumn(0).setCellRenderer(new MyTableCellRenderer());
testTable.getColumnModel().getColumn(0).setCellEditor(new MyTableCellEditor());
testTable.getColumnModel().getColumn(0).setPreferredWidth(200);
jScrollPane1.setViewportView(testTable);
testPanel.add(jScrollPane1);
getContentPane().add(testPanel, BorderLayout.CENTER);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width-496)/2, (screenSize.height-330)/2, 496, 330);
}// </editor-fold>
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TextButtonCellFrame().setVisible(true);
public class MyTableCellRenderer extends JPanel implements TableCellRenderer {
Point point;
JButton button1 = new JButton("Test 1");
JTextField txtField = new JTextField();
public MyTableCellRenderer() {
setLayout(new BorderLayout());
this.add(button1, BorderLayout.EAST);
this.add(txtField,BorderLayout.CENTER);
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int rowIndex, int vColIndex) {
if (isSelected) {
txtField.setBackground(testTable.getSelectionBackground());
txtField.setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
else {
txtField.setBackground(testTable.getBackground());
txtField.setBorder(null);
return this;
public class MyTableCellEditor extends DefaultCellEditor
implements ActionListener {
JPanel panel = new JPanel();
JButton button1 = new JButton ("Test 1");
JTextField txtField = new JTextField();
MyTableCellEditor() {
super (new JTextField());
button1.addActionListener(this);
panel.setLayout(new BorderLayout());
panel.add(button1, BorderLayout.EAST);
panel.add(txtField,BorderLayout.CENTER);
public void actionPerformed(ActionEvent e) {
if (e.getSource() == button1)
JOptionPane.showMessageDialog(null, "Action One Successful");
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
txtField.requestFocusInWindow();
return panel;
}regards,
nirvan.I don't know what's better:
import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.table.*;
public class TextButtonCellFrame extends JFrame {
JTable testTable = new JTable();
public TextButtonCellFrame() {
testTable.setModel(new DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null}
new String [] { "1", "2", "3", "4" }
testTable.setRowHeight(20);
testTable.getColumnModel().getColumn(0).setCellRenderer(
new MyTableCellRenderer());
testTable.getColumnModel().getColumn(0).setCellEditor(
new MyTableCellEditor(new JTextField()));
testTable.getColumnModel().getColumn(0).setPreferredWidth(200);
getContentPane().add(new JScrollPane(testTable));
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setSize(480,320);
setLocationRelativeTo(null);
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TextButtonCellFrame().setVisible(true);
public class MyTableCellRenderer extends JPanel
implements TableCellRenderer {
JButton button1 = new JButton("Test 1");
JTextField txtField = new JTextField();
public MyTableCellRenderer() {
setLayout(new BorderLayout());
this.add(button1, BorderLayout.EAST);
this.add(txtField,BorderLayout.CENTER);
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int rowIndex, int vColIndex) {
if (isSelected) {
txtField.setBackground(testTable.getSelectionBackground());
txtField.setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
} else {
txtField.setBackground(testTable.getBackground());
txtField.setBorder(null);
txtField.setText(value==null?"":value.toString());
return this;
public class MyTableCellEditor extends DefaultCellEditor
implements ActionListener {
JPanel panel = new JPanel(new BorderLayout());
JButton button1 = new JButton ("Test 1");
JTextField txtField; // = new JTextField();
MyTableCellEditor(JTextField txtField) {
super (txtField);
this.txtField = txtField;
button1.addActionListener(this);
panel.add(button1, BorderLayout.EAST);
panel.add(txtField,BorderLayout.CENTER);
public void actionPerformed(ActionEvent e) {
if (e.getSource() == button1)
JOptionPane.showMessageDialog(null, "Action One Successful");
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
txtField.setText(value==null?"":value.toString());
SwingUtilities.invokeLater(new Runnable() {
public void run() {
txtField.requestFocusInWindow();
return panel;
} -
Overriding double click in JTable custom cell
I have a JTable where I reset the custom cells to become editable on a single click instead if a double using:
((DefaultCellEditor)table.getDefaultEditor(String.class)).setClickCountToStart(1);
Now what I need to do is display a JPopupMenu click a cell is double clicked. This works on cells that are not editable but the problem is that the user needs the popup dialog to display info for the cells that are editable.
I have used the basic way to implement a double click on a certain column (in this case my third column):
public void mouseClicked(MouseEvent e){
if (e.getClickCount() == 2 && table.getSelectedColumn() == 2 ){
popupMenu.show( e.getComponent(),
e.getX(), e.getY() );
But when double clicking, nothing happens.
Anyone have any idea to implement this or over-ride an editable cell?
Thanks,
ChrisThis still says <identifier> expect, how can I resove this please? Then you still have something wrong with your code. Since you didn't post your code how are we supposed to help?
The proper way to ask a question is to include your demo code that trys to illustrate the problem. Something like the following:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TableRightClick extends JFrame
public TableRightClick()
JTable table = new JTable(10, 5);
table.addMouseListener( new MouseAdapter()
public void mousePressed(MouseEvent e)
if ( SwingUtilities.isRightMouseButton(e) )
// if (e.isPopupTrigger())
JTable source = (JTable)e.getSource();
int row = source.rowAtPoint( e.getPoint() );
int column = source.columnAtPoint( e.getPoint() );
System.out.println(column);
source.changeSelection(row, column, false, false);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
getContentPane().add( new JScrollPane(table) );
public static void main(String[] args)
TableRightClick frame = new TableRightClick();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible( true );
} -
JTable custom cell renderer and editor breaks row sorting
Hello Forum,
I have a JTable on which I set setAutoCreateRowSorter(true); I then hook up a custom cell editor and renderer for the Date class.
this.tblLeden.setDefaultRenderer(Date.class, new DateCellEditor());
this.tblLeden.setDefaultEditor(Date.class, new DateCellEditor());
The sorting for that particular row then breaks, it works fine for every other row. How do I fix this? Just directions where to look would be great too.
Here is my code for the renderer/editor:
(btw this is probably not the best way to do this so any suggestions for optimizing are great too)
import java.awt.Component;
import java.util.Date;
import java.util.EventObject;
import java.util.HashMap;
import java.util.Vector;
import javax.swing.JTable;
import javax.swing.event.CellEditorListener;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import com.toedter.calendar.JDateChooser;
public class DateCellEditor extends JDateChooser implements TableCellRenderer, TableCellEditor
private static final long serialVersionUID = -5073758499524392257L;
private final Vector<CellEditorListener> listeners = new Vector<CellEditorListener>();
// oops.. lingering objects problem when rows are deleted..
private final HashMap<Integer, JDateChooser> components = new HashMap<Integer, JDateChooser>();
@Override
public final Component getTableCellRendererComponent(final JTable table,
final Object value, final boolean isSelected, final boolean hasFocus,
final int row, final int col)
JDateChooser temp = this.components.get(Integer.valueOf(row));
if (temp == null)
temp = new JDateChooser();
this.components.put(Integer.valueOf(row), temp);
temp.setDate((Date) value);
return temp;
@Override
public final Component getTableCellEditorComponent(final JTable table,
final Object value, final boolean isSelected, final int row,
final int column)
JDateChooser temp = this.components.get(Integer.valueOf(row));
if (temp == null)
temp = new JDateChooser();
this.components.put(Integer.valueOf(row), temp);
temp.setDate((Date) value);
return temp;
@Override
public final void addCellEditorListener(final CellEditorListener arg0)
this.listeners.addElement(arg0);
@Override
public final void removeCellEditorListener(final CellEditorListener arg0)
this.listeners.removeElement(arg0);
@Override
public final void cancelCellEditing()
return;
@Override
public final Object getCellEditorValue()
return null;
@Override
public final boolean isCellEditable(final EventObject arg0)
return true;
@Override
public final boolean shouldSelectCell(final EventObject arg0)
return true;
@Override
public final boolean stopCellEditing()
return true;
}This seems to work:
import java.awt.Component;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.sql.Date;
import java.util.EventObject;
import java.util.HashMap;
import java.util.Vector;
import javax.swing.JTable;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import com.toedter.calendar.JDateChooser;
public class DateCellEditor implements TableCellRenderer, TableCellEditor, PropertyChangeListener
private static final long serialVersionUID = -5073758499524392257L;
private final Vector<CellEditorListener> listeners = new Vector<CellEditorListener>();
// oops.. lingering objects problem when rows are deleted..
private final HashMap<Integer, JDateChooser> components = new HashMap<Integer, JDateChooser>();
private Date storedValue = null;
@Override
public final Component getTableCellRendererComponent(final JTable table,
final Object value, final boolean isSelected, final boolean hasFocus,
final int row, final int col)
JDateChooser temp = this.components.get(Integer.valueOf(row));
if (temp == null)
temp = new JDateChooser();
temp.addPropertyChangeListener("date", this);
this.components.put(Integer.valueOf(row), temp);
temp.setDate((Date) value);
return temp;
@Override
public final Component getTableCellEditorComponent(final JTable table,
final Object value, final boolean isSelected, final int row,
final int column)
JDateChooser temp = this.components.get(Integer.valueOf(row));
if (temp == null)
temp = new JDateChooser();
temp.addPropertyChangeListener("date", this);
this.components.put(Integer.valueOf(row), temp);
temp.setDate((Date) value);
return temp;
@Override
public final void addCellEditorListener(final CellEditorListener arg0)
this.listeners.addElement(arg0);
@Override
public final void removeCellEditorListener(final CellEditorListener arg0)
this.listeners.removeElement(arg0);
@Override
public final void cancelCellEditing()
return;
@Override
public final Object getCellEditorValue()
return this.storedValue;
@Override
public final boolean isCellEditable(final EventObject arg0)
return true;
@Override
public final boolean shouldSelectCell(final EventObject arg0)
return true;
@Override
public final boolean stopCellEditing()
return true;
@Override
public final void propertyChange(final PropertyChangeEvent arg0)
if (((JDateChooser) arg0.getSource()).getDate() == null)
return;
this.storedValue = new Date(((JDateChooser) arg0.getSource()).getDate().getTime());
ChangeEvent event = new ChangeEvent(arg0.getSource());
for (int i = 0; i < this.listeners.size(); i++)
this.listeners.elementAt(i).editingStopped(event);
} -
JTable custom cell editor focus problem
Hi I have created a JTable (using Java 1.4.2) and have three cell Editors, one is a JFormattedTextField, one is a JComboBox and one is a custom cell editor.
When I press tab I can select the cell with the JFormattedTextField and when I start typing the JFormattedTextField accepts my input and it is displayed in the cell. This is the type of behaviour I would like but it does not seem to work for my other 2 cell editors:
When I tab to the JComboBox cell I can see that the cell is selected but typing or using the arrow keys does not allow me to select a new value in the JComboBox. (I have also tried typing space or enter to activate the JComboBox whilst the cell is selected.) The only ways to select a new value at the moment is to first click on the cell with the mouse and then use the keyboard to select a new value. It is like the actual JComboBox is not receiving the focus? Does anyone know how to solve this problem?
I also seem to have the same problem with my custom cell editor. My custom editor is a JPanel which contains JFormattedTextField again I can tab to the cell and see that it is selected but to activate the JFormattedTextField I have to actually select it with the mouse.
I have been stuck on this for some time so if any one has any suggestions they would be much appreciated !Hi I have created a JTable (using Java 1.4.2) and have three cell Editors, one is a JFormattedTextField, one is a JComboBox and one is a custom cell editor.
When I press tab I can select the cell with the JFormattedTextField and when I start typing the JFormattedTextField accepts my input and it is displayed in the cell. This is the type of behaviour I would like but it does not seem to work for my other 2 cell editors:
When I tab to the JComboBox cell I can see that the cell is selected but typing or using the arrow keys does not allow me to select a new value in the JComboBox. (I have also tried typing space or enter to activate the JComboBox whilst the cell is selected.) The only ways to select a new value at the moment is to first click on the cell with the mouse and then use the keyboard to select a new value. It is like the actual JComboBox is not receiving the focus? Does anyone know how to solve this problem?
I also seem to have the same problem with my custom cell editor. My custom editor is a JPanel which contains JFormattedTextField again I can tab to the cell and see that it is selected but to activate the JFormattedTextField I have to actually select it with the mouse.
I have been stuck on this for some time so if any one has any suggestions they would be much appreciated ! -
Hello everyone,
what is the correct way of writing a custom cell editor for a JTable? I followed the example in the Java tutorial ([How to use tables|http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#editor]), but the result is a bit weird. The code I have is the following:
private class NumericCellEditor extends AbstractCellEditor implements TableCellEditor {
NumericFTField field = new NumericFTField(threeDecimalsFormat, 3, null, 1);
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int col) {
field.setValue(value);
return field;
public Object getCellEditorValue() {
return field.getValue();
@Override
public boolean stopCellEditing() {
if (((NumericFTField)field).verifyDouble()) {
field.setBorder(new EmptyBorder(0, 0, 0, 0));
fireEditingStopped();
return true;
} else {
field.setBorder(BorderFactory.createLineBorder(Color.red));
return false;
}where the NumericFTField is a class derived from JFormattedTextField that only allows digits, decimal separator, minus and 'E' to be inserted, and it monitors clipboard operations. verifyDouble() is a method of the NumericFTField class that verifies whether the current input can be parsed to a double and whether it satisfies everything it should. This is then used in
((TableColumn)jTblSpecs.getColumnModel().getColumn(1)).setCellEditor(new NumericCellEditor());The NumericFTField class works great, I use it also in place of a JTextFields, so I'd say there is nothing wrong with it.
After I click in a cell (single click), it behaves a little different that the default cell editor: the cell is not highlighted, but it immediately jumps to the editing state (why???). I, indeed, can insert the allowed characters only. When I click in a cell, do some editing and press Enter, the cell's content gets validated. If it is invalid, stopCellEditing() method does its magic; if it is valid, the caret disappears and everything SEEMS okay. However, if I started typing at this point, the cell reverts to the editing state, but now I am able to enter any character I want. It truly looks like the cell editor is now some other component, not the original NumericFTField one. What is going on here?
It would be great is someone could provide a short schematic source of a custom cell editor class that would work exactly as the JTable's default one except it would only permit digits and so on. It doesn't have to be anything fancy, just a "skeleton" of the class with comments like "input verification here" etc.
I am sorry for any lack of clarity, but I am still a Java newbie.
Any help would be much appreciated.
Best regards,
vtHi,
I am also facing the same problem. In addition to what you have specified, my requirement is to be able to select multiple rows for deletion. But, the very first row selected using mouse is not visible as selected though its selected. The other rows are visible as selected.
If you can use any JDK version, start using JDK1.6. You will not be facing this problem. There were so many changes done for swings from JDK 1.4 to 1.6. But, I have to strictly use JDK1.4, but could not find any workaround for this problem.
It would be great if anyone can help me out in this issue to get workaround for this problem. -
JTable Custom Cell Editor: how to get value?
I have some custom cell renderers and editor. One of my custom cell editor is a text field that can popup a separat gui for easier data selection. As this text field alone with the popup gui works great, when i use this field in my custom jtable cell editor, the gui selected value is never displayed in the table cell. it just shows the old value.?
Well, here's how I do it. I'm very new to Swing so I'm, not sure if this is the best way. If you find a better way, please repost on this message.
My cell editor is a JPanel with a JTextfield in it. I make sure that the JTextfield will have default focus when the JPanel is focused.
In the CellEditor, I add a KeyListener to the JTextField so that when the user hits enter, it fires the stopEditing. I then add a function to CellEditor that returns what's in the JTextField.
In the code, m_value is the JTextField. You want to add MyKeyAdapter to the JTextField. Viola, it works!
* This private class reads in an enter key.
class MyKeyAdapter extends KeyAdapter {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
stopCellEditing();
* Returns the value of the editor
* @return the value of the editor
public String getValue() {
return m_value.getText(); -
JTable - Custom cell editor lossing commit
Hello,
I have a custom cell editor and a default renderer assigned to a specific cell in my table...
I have the following problem :
If i change the value of cell 'c1' from value 'v1' to 'v2' and press enter and go to another cell the value in 'c1' is rendered correctly as 'v2'
Hoever if i change the value of cell 'c1' from 'v1' to 'v2' and simply click over to another cell the value in 'c1' stays rendered as 'v1'
Question : Is there ANY way to mimic the behavior of the user pressing enter in my custom cell editor when a user simply selects another cell, i guess on loss of focus or something..
This is the last problem i have on the current project i am on and its very annoying.
Thanks in advance, any help appreciated..
-AlanI have the same problem using a custom Date/Time Picker Object (which extends JComboBox) as an editor within a table cell. For simplicity sake, I am posting code using only the base editable JComboBox, but it exhibits the same symptoms. If you enter a value in the TextField portion of the ComboBox and Tab, your value remains the same. If you enter a value in the TextField portion of the ComboBox and click in another cell, the value returns to the previous value (before editing began).
import java.awt.*; // BorderLayout
import javax.swing.*; // JTable, JFrame
import javax.swing.table.*; // DefaultTableModel
public class Tester extends JFrame
public static void main(String[] args)
Tester test = new Tester();
public Tester()
String[] values = {"Test", "Values"};
JComboBox combo = new JComboBox(values);
combo.setEditable(true);
DefaultCellEditor editor = new DefaultCellEditor(combo);
JTable table = new JTable(2, 3);
table.getColumn(table.getColumnName(0)).setCellEditor(editor);
JScrollPane scroll = new JScrollPane(table);
getContentPane().add(scroll, BorderLayout.CENTER);
pack();
setVisible(true);
} -
I'm working on a form that inserts data into my database. The normal Insert PL/SQL just does "doInsert". I want to add in the PL/SQL Button Event Handler a condition statement as follows:
IF :new.name_id != null THEN
doInsert;
ELSE
"do something else"
END IF;
"name_id" is one of the form items. I want to check the value in name_id before I insert it into the database. What is the correct verbage in order for this condition to work -- :new.name_id does not work.
Thanks
Susan<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Susan Miller ([email protected]):
I'm working on a form that inserts data into my database. The normal Insert PL/SQL just does "doInsert". I want to add in the PL/SQL Button Event Handler a condition statement as follows:
IF :new.name_id != null THEN
doInsert;
ELSE
"do something else"
END IF;
"name_id" is one of the form items. I want to check the value in name_id before I insert it into the database. What is the correct verbage in order for this condition to work -- :new.name_id does not work.
Thanks
Susan<HR></BLOCKQUOTE>
null -
Is there a C# example of using the ExpressionEdit Control Custom Button Event Handler
TestStand 4.1
C# 2008
I have added the event handler to the ExpressionEdit events as I would any event handler:
exprEdit.ButtonClick += new NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler(_ExpressionEditEvents_ButtonClickEvent);
Next, I create the Event Handler using the syntax
public void _ExpressionEditEvents_ButtonClickEvent(NationalInstruments.TestStand.Interop.UI.ExpressionEditButton btn)
I get the following error when I try to build:
Error 1 No overload for '_ExpressionEditEvents_ButtonClickEvent' matches delegate 'NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler'
I assume this means that I don't have the correct parameters or types in my Event Handler declaration but it matches the Object Browser. Any ideas on what I am missing?
Solved!
Go to Solution.Try removing the "Ax." from your namespace qualifier as I marked below. I think you want the one in just the UI namespace.
Edit: well not necessarily. Is your exprEdit variable declared as "NationalInstruments.TestStand.Interop.UI.Ax.AxExpressionEdit" or as "NationalInstruments.TestStand.Interop.UI.ExpressionEdit"?
If it is an AxExpressionEdit then I think you will want your event handler to look like this:
void exprEdit_ButtonClick(object sender, NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEvent e)
-Jeff
skribling wrote:
TestStand 4.1
C# 2008
I have added the event handler to the ExpressionEdit events as I would any event handler:
exprEdit.ButtonClick += new NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler(_ExpressionEditEvents_ButtonClickEvent);
Next, I create the Event Handler using the syntax
public void _ExpressionEditEvents_ButtonClickEvent(NationalInstruments.TestStand.Interop.UI.ExpressionEditButton btn)
I get the following error when I try to build:
Error 1 No overload for '_ExpressionEditEvents_ButtonClickEvent' matches delegate 'NationalInstruments.TestStand.Interop.UI.Ax._ExpressionEditEvents_ButtonClickEventHandler'
I assume this means that I don't have the correct parameters or types in my Event Handler declaration but it matches the Object Browser. Any ideas on what I am missing?
Message Edited by Jeff.A. on 06-11-2010 03:25 PM
Message Edited by Jeff.A. on 06-11-2010 03:28 PM -
JTable: Custom cell renderer on T(row, col)
Sorry if this was posted before, but the whole Search function doesn't seem to work these days (hasn't been working for a week now). Anyways:
I know how to create custom cell renderers. My problem lies with which cells I want to apply that cell renderer to. It seems I am limited in setting a cell renderer to a whole column, which I don't want.
For instance, I'd like to apply cell renderer R1 to (0,0) but not to (1,0) and not to (3,0). Instead I want cell renderer R2 on (2,0) and (3,0).
Example of my table:
|--icon--|--filename--|--extension--|
| R1 | file1.txt | txt |
| R2 | img1.jpg | jpg |
| R1 | file2.txt | txt |
| R2 | img2.jpg | jpg |
|-----------------------------------|Is there any possibility this can be achieved? I am probably overlooking some method or class, but I don't know which. Some pointers or clues in the right directions are appreciated.
ThanksCamickr, again you've been a great help. Works great, but a NullPointerException is being thrown and I can't find out what points to a null object.
Code is this:
public TableCellRenderer getCellRenderer(int row, int column) {
if (getValueAt(row, 3).equals("jpg") && column == 0) {
return new IconCellRenderer(Klue.iconAdd);
} else {
return super.getCellRenderer(row, column);
}Solution is catching the NullPointerException in this method, but I'd rather have an if statement checking for it. But what to check? Any ideas?
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