JTable containing JTable
I am handeling with a special Jtable containing cells with other Jtables and also buttons which use values from the table. The problem is, when i am changing a cell and without losing the focus i am clicking in another place, the value being used for the cell i am currenty editting, is the old value, instead of the new one. Sorry, but it is a little bit difficult to explain here. I have tried to use the "fireTableDataChanged()" event, but then i lose the selected row which is a crucial value for the application.
Maybe you could save the current row, then fire the fireTableDataChanged() then reselect the current row.
What do you think about that? That's the only way I know how to do it unless you wrote your own fireTableDataChanged() which would essentially do what I just suggested.
Similar Messages
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JTable containing checkbox column is not getting updated
My application has a JTable and the first column is made up of checkboxes I have added a mouse listener for this table and implementd mousePressed(MouseEvent) method also. So when the user presses the mouse on these checkboxes I will update my loca data structure. Now the problem is this, when the user presses and drags the mouse to some other place(out of the current cell) then the table is not getting updated(the cell is not changing its value). But my local data structure is getting updated as the event is already fired. Please suggest me a solution for this.
Thanks in advance
Varunthanks for your information. Actually I have seen this tutorial before but I think my case is little different. Sorry for not explaining it completely. My table has got a checkbox column header and another checkbox which is not part of the table. The second column in the table contains a user object. User can select rows by clicking on the checkbox header (select all rows/ deselect all rows), by clicking on individual cells or by clicking on the third checkbox provided for a specific purpose. So whenever the user does this "selection" operation I update one member variable in the user object which is in the second column. I tried putting my code in the setValueAt() method of my table model but couldn't make it work because of my lack of experience in swing or programming. So please tell me whether what you have suggested is valid or not. I added a mouse listener because there was a requirement to show some information to the user when he do a double click on one column of the table.
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Hello. I'm trying to see if it's at all possible to have a JTable inside a JTable cell. I tried modifying those 'JButton inside JCell' examples, to no avail - it seems I didn't actually grasp the idea.
so anyway - did anyone ever do that? have a table inside a table? anyone can point me in the right direction?
thanks.Hello. I'm trying to see if it's at all possible to
have a JTable inside a JTable cell. I tried modifying
those 'JButton inside JCell' examples, to no avail -
it seems I didn't actually grasp the idea.It is possible, but I think it would make things confusing for the user. What exactly are you wanting to display?
>
so anyway - did anyone ever do that? have a table
inside a table? anyone can point me in the right
direction?You need a custom renderer and custom editor and most likely custom TableModels for each table. There are row height issues as well, especially if the rows/columns of the inner tables are variable. The getValueAt() method will require some thought. What is the value associated with all the cells in the inner table?
All in all, this is doable, but may not be desirable.
>
thanks. -
Hello!
I have a JTable with 3 rows... I want to do something like this:
In the last column of each row, there is a button... When I click this button, a table should appear above the current row...
Is there any way to do it?
ThanksI read the Java tutorial about the GlassPane. If I let it visible, it will block all mouse events, which is not what I want I think. Assume I use the GlassPane, I will store the inner JTable as the value in the outer JTable cells, and I use a customized cell renderer to draw the JTable. When mouse clicks on one of the inner JTable cells, the editor takes over, and draws the inner JTable again. Am I on the right track here?
Thanks for refering me to the GlassPane! -
JTable inside JTable cell: drag and drop
Hello. I've table (let's call it ParentTable), which cells contain other table (NestedTable). NestedTable recieves all events (I can move cursor, select cells by mouse, scroll table). ParentTable have enabled Drag nad Drop (D'n'D). When no cells in NestedTable are selected D'n'D works fine. When I select some cell in NestedTable, D'n'D does't work � it forbids the operation. I think this is because NestedTable recieves D'n'D events, but D'n'D is disabled for it. How can I work around this? I don't want to enable D'n'D for each NestedTable (there are several reasons for this).
The question is � can I pass to NestedTable all events, except of D'n'D ones?Yes, I use custom cell renderer and cell editor for ParentTable, which returns NestedTable.
DnD turned on for the ParentTable, so when the NestedTable is active (some cells selected in it) it receives DnD events, which are turned off for it, and DnD doesn't work.
Possible solution is to turn DnD for NestedTable (not for ParentTable), and i'll do this if it is impossible to make it work in current configuration.
So the question is � is this possible do not pass DnD event to NestedTable ? -
I want to view additional table below the selected row on my table. This additional table will display more additional data for the selected row.
My question is how to display/put this additional table just below the selected table? so that if I expand the current selected row it will display this additional table.Create a JPopop (or maybe even a JPopupMenu). Add your table to it and then position it below the selected row. of the table.
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Hello all,
JTable inherits from the Container class, but can we add Components to a JTable like we can to other Containers? Shouldn't the following code display a table that contains a JLabel?
I know that if I want a JTable to contain a specific label, I should use a custom renderer (and indeed I am). The problem is, I want the Label to display only when the JTable contains no values, which will give the custom renderer nothing to render. The end goal is simply a single row that contains a message like "This JTable contains no values." I can't simply set one of the cells to that because I want the JLabel to span multiple columns, to be as visible as possible.
I appreciate any clarification you can give me. And maybe I'm approaching this from the wrong direction, so I'm open to new suggestions on how to accomplish my goal!
Thanks,
Kevin
import javax.swing.*;
import java.awt.*;
public class TestTable{
public static void main(String [] args){
JFrame frame = new JFrame("Testing Table");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String[] columnNames = {"One Line",
"<html>Two<br/>Lines",
"Single Line"
String[][] tableData = {{"one", "two", "three"},
{"ABC", "DEF", "GHI"},
{"Cats", "Dog", "Monkey"}};
JTable table = new JTable(tableData, columnNames);
table.getTableHeader().setPreferredSize(new Dimension(200,50));
JLabel label = new JLabel("Testing Label");
label.setMinimumSize(new Dimension(600,50));
label.setMaximumSize(new Dimension(600,50));
label.setPreferredSize(new Dimension(600,50));
table.add(label);
JScrollPane scroll = new JScrollPane(table);
frame.getContentPane().add(scroll);
frame.setSize(200,400);
frame.setVisible(true);
}JTable uses a null layout. Any components added will need to have size and location set (not preferred size mind you).
What if you changed your label code to:
JLabel label = new JLabel("Testing Label");
label.setFont(label.getFont().deriveFont(Font.BOLD, 24));
label.setSize(600, 60);
label.setLocation(0, 0);Edited by: Encephalopathic on May 12, 2009 7:00 AM -
Error in updating Jtable Database
package desktopapplication1; import java.util.*; import java.sql.*; import javax.swing.JOptionPane; import javax.swing.table.*; public class Datab extends DefaultTableModel { private Connection conn; private Statement st; private ResultSet rs; private ResultSetMetaData rsmd; private int rows; public Datab(String driver, String url, String query) throws SQLException, ClassNotFoundException { Class.forName(driver); conn = DriverManager.getConnection(url); st = conn.createStatement(rs.TYPE_SCROLL_SENSITIVE,rs.CONCUR_UPDATABLE); if ( query.substring(0,3).equalsIgnoreCase("INS") ) { st.executeUpdate(query); } else if ( query.substring(0,3).equalsIgnoreCase("DEL") ) { st.executeUpdate(query); } else { rs = st.executeQuery(query); rsmd = rs.getMetaData(); rs.last(); rows = rs.getRow(); } fireTableStructureChanged(); } public String getColumnName(int column){ try{ return rsmd.getColumnName(column+1); }catch(Exception e){ e.printStackTrace(); } return ""; } public int getColumnCount(){ try{ return rsmd.getColumnCount(); }catch(Exception e){ e.printStackTrace(); } return 0; } public int getRowCount(){ try{ return rows; }catch(Exception e){ e.printStackTrace(); } return 0; } public Object getValueAt(int row, int column){ try{ rs.absolute(row+1); return rs.getObject(column+1); }catch(Exception e){ e.printStackTrace(); } return ""; } public Class getColumnClass(int c) { return getValueAt(0, c).getClass(); } public boolean isCellEditable(int row, int column) { if (column < 0) { return false; } else { return true; } } public void setValueAt(Object value, int row, int column){ try{ int conf = JOptionPane.showConfirmDialog(null,"You wanna reaplace "+getValueAt(row,column)+" with "+value+"?", null, 2); if ( conf == 0 ) { rs.absolute(row+1); System.out.println("ROW = "+row+"CURSOR = "+(row+1)+""+rs.getString(1)+column); rs.updateString("Recipe","test"); //i tried to use a simple update cause the normal was not running but same error+ rs.updateRow(); }else { System.out.println("0"); } }catch(SQLException sqle){ System.err.println("Error setting value at row "+row+" column "+column+" with value "+value); sqle.printStackTrace(); } } }
hi, when i click on my table to edit a value, it give me an error and sometimes fill the cell with a value like [B@341j0j
Error setting value at row 1 column 0 with value soup2
java.sql.SQLException: [Microsoft][Driver ODBC Microsoft Access]Error in row
at sun.jdbc.odbc.JdbcOdbcResultSet.setPos(JdbcOdbcResultSet.java:5271)
at sun.jdbc.odbc.JdbcOdbcResultSet.updateRow(JdbcOdbcResultSet.java:4171)
at desktopapplication1.Datab.setValueAt(Datab.java:104)
at javax.swing.JTable.setValueAt(JTable.java:2719)
at javax.swing.JTable.editingStopped(JTable.java:4721)
at javax.swing.AbstractCellEditor.fireEditingStopped(AbstractCellEditor.java:125)
at javax.swing.DefaultCellEditor$EditorDelegate.stopCellEditing(DefaultCellEditor.java:350)
at javax.swing.DefaultCellEditor.stopCellEditing(DefaultCellEditor.java:215)
at javax.swing.JTable$GenericEditor.stopCellEditing(JTable.java:5475)
at javax.swing.DefaultCellEditor$EditorDelegate.actionPerformed(DefaultCellEditor.java:367)
at javax.swing.JTextField.fireActionPerformed(JTextField.java:492)
at javax.swing.JTextField.postActionEvent(JTextField.java:705)
at javax.swing.JTextField$NotifyAction.actionPerformed(JTextField.java:820)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2851)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2886)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
at java.awt.Component.processEvent(Component.java:6040)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:704)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:969)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:841)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:668)
at java.awt.Component.dispatchEventImpl(Component.java:4502)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
my db is like
RecipeName intvalue1 intvalue2 intvalue3 stringvalue4
soup 3 2 11 fish
chocolate 3 2 44 dessert
Edited by: kainard on Aug 1, 2010 2:31 PM
Edited by: kainard on Aug 1, 2010 2:37 PMCan you explain why you declare
private Connection conn;
private Statement st;
private ResultSet rs;
private ResultSetMetaData rsmd;
as private -
Refresh jTable after inserting new data into the Database
Hey all,
I'm using Netbeans 6.5 to create a Desktop Application which is connected to a Java DB (Derby).
The first simple steps were all very successfull:
Create the jTable and bind it to the Database => everything works fine. When the application starts it correctly shows all data from the database.
The problem starts when I try to insert new data to the database.
For that reason I've created textfields and a button "Save". When I press the button it successfully inserts the data to the database but they are not displayed in the jTable (when the application starts they are all there, they are not updated at runtime) . I've tried table.invalidate() and table.repaint() but they just don't work.
Any help will be GREATLY appreciated. But please have in mind that most of the code is Netbeans-generated and most of it not editable.
Many thanks in advance.
GeorgeOnce again you are right my friend. I jumped to conclusion way too fast, when I shouldn't. (Give me a break, I've been busting my head with this well over a week). The response I saw when I did that was that indeed a line is added to the jTable. Because I falsly set the index of the object to be added to be second to last the row appeared on the table, what I didn't see at the time was that the last one disappeared. Hmm...
A new adventure begins...
So after a few hours of messing around with it here are my observations:
1) It was not an observable list. When I add the new element with employeesList.add(newEmp); , the table gets notified but a get a bunch of exceptions:
xception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: Index: 84, Size: 84
at java.util.ArrayList.RangeCheck(ArrayList.java:546)
at java.util.ArrayList.get(ArrayList.java:321)
at org.jdesktop.swingbinding.impl.ListBindingManager$ColumnDescriptionManager.validateBinding(ListBindingManager.java:191)
at org.jdesktop.swingbinding.impl.ListBindingManager.valueAt(ListBindingManager.java:99)
at org.jdesktop.swingbinding.JTableBinding$BindingTableModel.getValueAt(JTableBinding.java:713)
at javax.swing.JTable.getValueAt(JTable.java:1903)
at javax.swing.JTable.prepareRenderer(JTable.java:3911)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1974)
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1897)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:154)
at javax.swing.JComponent.paintComponent(JComponent.java:743)
at javax.swing.JComponent.paint(JComponent.java:1006)
at javax.swing.JViewport.blitDoubleBuffered(JViewport.java:1602)
at javax.swing.JViewport.windowBlitPaint(JViewport.java:1568)
at javax.swing.JViewport.setViewPosition(JViewport.java:1098)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.vsbStateChanged(BasicScrollPaneUI.java:818)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.stateChanged(BasicScrollPaneUI.java:807)
at javax.swing.DefaultBoundedRangeModel.fireStateChanged(DefaultBoundedRangeModel.java:348)
at javax.swing.DefaultBoundedRangeModel.setRangeProperties(DefaultBoundedRangeModel.java:285)
at javax.swing.DefaultBoundedRangeModel.setValue(DefaultBoundedRangeModel.java:151)
at javax.swing.JScrollBar.setValue(JScrollBar.java:441)
at javax.swing.plaf.basic.BasicScrollBarUI.scrollByUnits(BasicScrollBarUI.java:907)
at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.mouseWheelMoved(BasicScrollPaneUI.java:778)
at javax.swing.plaf.basic.BasicScrollPaneUI$MouseWheelHandler.mouseWheelMoved(BasicScrollPaneUI.java:449)
at apple.laf.CUIAquaScrollPane$XYMouseWheelHandler.mouseWheelMoved(CUIAquaScrollPane.java:38)
at java.awt.Component.processMouseWheelEvent(Component.java:5690)
at java.awt.Component.processEvent(Component.java:5374)
at java.awt.Container.processEvent(Container.java:2010)
at java.awt.Component.dispatchEventImpl(Component.java:4068)
at java.awt.Container.dispatchEventImpl(Container.java:2068)
at java.awt.Component.dispatchMouseWheelToAncestor(Component.java:4211)
at java.awt.Component.dispatchEventImpl(Component.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2068)
at java.awt.Component.dispatchEvent(Component.java:3903)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)
at java.awt.Container.dispatchEventImpl(Container.java:2054)
at java.awt.Window.dispatchEventImpl(Window.java:1801)
at java.awt.Component.dispatchEvent(Component.java:3903)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: Index: 84, Size: 84
at java.util.ArrayList.RangeCheck(ArrayList.java:546)
at java.util.ArrayList.get(ArrayList.java:321)
at org.jdesktop.swingbinding.impl.ListBindingManager$ColumnDescriptionManager.validateBinding(ListBindingManager.java:191)
at org.jdesktop.swingbinding.impl.ListBindingManager.valueAt(ListBindingManager.java:99)
at org.jdesktop.swingbinding.JTableBinding$BindingTableModel.getValueAt(JTableBinding.java:713)
at javax.swing.JTable.getValueAt(JTable.java:1903)
at javax.swing.JTable.prepareRenderer(JTable.java:3911)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
... and a lot morewhich from my poor understanding means that the jTable succesfully notices the change but it is not able (??) to adjust to the new change. What is more interesting is that when I plainly add the element to the end of the list (without an idex that is), a blank row appears at the end of my Table. The weird thing is that I've bound the table to some text fields below it, and when I select that empty row all the data appear correctly to the text fields.
I tried going through:
org.jdesktop.observablecollections.ObservableCollections.observableList(employeesList).add(newEmp);as well as
help = org.jdesktop.observablecollections.ObservableCollections.observableListHelper(employeesList);
help.getObservableList().add(newEmp);
help.fireElementChanged(employeesList.lastIndexOf(newEmp));and
obsemployeesList = org.jdesktop.observablecollections.ObservableCollections.observableList(employeesList);
obsemployeesList.add(newEmp);and I still get the same results (both the exeptions and the mysterious empty row at the end of the table
So, I'm again in terrible need of your advice. I can't thank you enough for the effort you put into this.
Best regards,
George
Edited by: tougeo on May 30, 2009 11:06 AM
Edited by: tougeo on May 30, 2009 11:21 AM
Edited by: tougeo on May 30, 2009 11:30 AM -
MDI JTable Overlap Area Repaint Problem
Hi all,
I have a problem for my application in MDI mode.
I open many windows (JInternalFrame contain JTable) under JDesktopPane. Some of the windows are overlapping and when they receive update in the table, it seems repaint all of the overlapping windows, not only itself. This make my application performance become poor, slow respond for drap & drop an existing window or open a new window.
To prove this, i make a simple example for open many simple table and have a thread to update the table's value for every 200 mill second. After i open about 20 windows, the performance become poor again.
If anyone face the same problem with me and any suggestions to solve the problem ?
Please help !!!!!
Following are my sources:
public class TestMDI extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel contentPanel;
private JDesktopPane desktopPane;
private JMenuBar menuBar;
private List<TestPanel> allScreens = new ArrayList<TestPanel>();
private List<JDialog> freeFloatDialogs = new ArrayList<JDialog>();
private List<JInternalFrame> mdiInternalFrm = new ArrayList<JInternalFrame>();
int x = 0;
int y = 0;
int index = 0;
private static int MDI_MODE = 0;
private static int FREE_FLOAT_MODE = 1;
private int windowMode = MDI_MODE;
public TestMDI() {
init();
public static void main(String[] args) {
new TestMDI().show();
public void init() {
contentPanel = new JPanel();
desktopPane = new JDesktopPane();
desktopPane.setDragMode(JDesktopPane.LIVE_DRAG_MODE);
desktopPane.setFocusTraversalKeysEnabled(false);
desktopPane.setFocusTraversalPolicyProvider(false);
desktopPane.setBorder(null);
desktopPane.setIgnoreRepaint(true);
desktopPane.setPreferredSize(new Dimension(1000, 800));
this.setSize(new Dimension(1000, 800));
menuBar = new JMenuBar();
JMenu menu1 = new JMenu("Test");
JMenuItem menuItem1 = new JMenuItem("Open Lable Screen");
menuItem1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int i = 1; i < 4; i++) {
final TestJLableScreen screen = new TestJLableScreen("Screen " + (allScreens.size() + 1));
screen.startTime();
if (windowMode == MDI_MODE) {
JInternalFrame frame = createInternalFram(screen);
desktopPane.add(frame);
mdiInternalFrm.add(frame);
if (allScreens.size() * 60 + 100 < 1000) {
x = allScreens.size() * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
frame.setLocation(x, y);
frame.setVisible(true);
} else {
JDialog dialog = createJDialog(screen);
freeFloatDialogs.add(dialog);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
dialog.setLocation(x, y);
dialog.setVisible(true);
allScreens.add(screen);
JMenuItem menuItem2 = new JMenuItem("Open Table Screen");
menuItem2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int i = 1; i < 4; i++) {
TestTableScreen screen = new TestTableScreen("Screen " + (allScreens.size() + 1));
screen.startTime();
if (windowMode == MDI_MODE) {
JInternalFrame frame = createInternalFram(screen);
desktopPane.add(frame);
mdiInternalFrm.add(frame);
if (allScreens.size() * 60 + 100 < 1000) {
x = allScreens.size() * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
frame.setLocation(x, y);
frame.setVisible(true);
} else {
JDialog dialog = createJDialog(screen);
freeFloatDialogs.add(dialog);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
dialog.setLocation(x, y);
dialog.setVisible(true);
allScreens.add(screen);
menu1.add(menuItem1);
menu1.add(menuItem2);
this.setJMenuBar(menuBar);
this.getJMenuBar().add(menu1);
this.getJMenuBar().add(createSwitchMenu());
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.add(desktopPane);
desktopPane.setDesktopManager(null);
public JInternalFrame createInternalFram(final TestPanel panel) {
final CustomeInternalFrame internalFrame = new CustomeInternalFrame(panel.getTitle(), true, true, true, true) {
public void doDefaultCloseAction() {
super.doDefaultCloseAction();
allScreens.remove(panel);
internalFrame.setPanel(panel);
// internalFrame.setOpaque(false);
internalFrame.setSize(new Dimension(1010, 445));
internalFrame.add(panel);
internalFrame.setFocusTraversalKeysEnabled(false);
internalFrame.setFocusTraversalPolicyProvider(false);
desktopPane.getDesktopManager();
// internalFrame.setFocusTraversalKeysEnabled(false);
internalFrame.setIgnoreRepaint(true);
return internalFrame;
public JDialog createJDialog(final TestPanel panel) {
JDialog dialog = new JDialog(this, panel.getTitle());
dialog.setSize(new Dimension(1010, 445));
dialog.add(panel);
dialog.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
allScreens.remove(panel);
return dialog;
public JMenu createSwitchMenu() {
JMenu menu = new JMenu("Test2");
JMenuItem menuItem1 = new JMenuItem("Switch FreeFloat");
menuItem1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
windowMode = FREE_FLOAT_MODE;
for (JInternalFrame frm : mdiInternalFrm) {
frm.setVisible(false);
frm.dispose();
frm = null;
mdiInternalFrm.clear();
remove(desktopPane);
desktopPane.removeAll();
// revalidate();
repaint();
add(contentPanel);
index = 0;
for (JDialog dialog : freeFloatDialogs) {
dialog.setVisible(false);
dialog.dispose();
dialog = null;
freeFloatDialogs.clear();
for (int i = 0; i < allScreens.size(); i++) {
JDialog dialog = createJDialog(allScreens.get(i));
freeFloatDialogs.add(dialog);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
dialog.setLocation(x, y);
dialog.setVisible(true);
JMenuItem menuItem2 = new JMenuItem("Switch MDI");
menuItem2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
windowMode = MDI_MODE;
remove(contentPanel);
add(desktopPane);
for (int i = 0; i < freeFloatDialogs.size(); i++) {
freeFloatDialogs.get(i).setVisible(false);
freeFloatDialogs.get(i).dispose();
freeFloatDialogs.clear();
// revalidate();
repaint();
for (JInternalFrame frm : mdiInternalFrm) {
frm.setVisible(false);
frm.dispose();
frm = null;
mdiInternalFrm.clear();
index = 0;
for (int i = 0; i < allScreens.size(); i++) {
JInternalFrame frame = createInternalFram(allScreens.get(i));
desktopPane.add(frame);
mdiInternalFrm.add(frame);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
frame.setLocation(x, y);
frame.setVisible(true);
menu.add(menuItem1);
menu.add(menuItem2);
return menu;
public class TestTableScreen extends TestPanel {
private static final long serialVersionUID = 1L;
JTable testTable = new JTable();
MyTableModel tableModel1 = new MyTableModel(1);
private boolean notRepaint = false;
int start = 0;
JScrollPane scrollPane = new JScrollPane();
private Timer timmer = new Timer(200, new ActionListener() {
public void actionPerformed(ActionEvent e) {
Random indexRandom = new Random();
final int index = indexRandom.nextInt(50);
Random valRandom = new Random();
final int val = valRandom.nextInt(600);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
notRepaint = false;
TestTableScreen.this.update(index + "|" + val);
public TestTableScreen(String title) {
this.title = title;
init();
tableModel1.setTabelName(title);
public void startTime() {
timmer.start();
public String getTitle() {
return title;
public void update(String updateStr) {
String[] val = updateStr.split("\\|");
if (val.length == 2) {
int index = Integer.valueOf(val[0]);
List vals = tableModel1.getVector();
if (vals.size() > index) {
vals.set(index, val[1]);
// tableModel1.fireTableRowsUpdated(index, index);
} else {
vals.add(val[1]);
// tableModel1.fireTableRowsUpdated(vals.size() - 1, vals.size() - 1);
tableModel1.fireTableDataChanged();
public TableModel getTableModel() {
return tableModel1;
public void init() {
testTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
testTable.setRowSelectionAllowed(true);
this.testTable.setModel(tableModel1);
int[] width = { 160, 80, 45, 98, 60, 88, 87, 88, 80, 70, 88, 80, 75, 87, 87, 41, 88, 82, 75, 68, 69 };
TableColumnModel columnModel = testTable.getColumnModel();
for (int i = 0; i < width.length; i++) {
columnModel.getColumn(i).setPreferredWidth(width[i]);
testTable.setRowHeight(20);
tableModel1.fireTableDataChanged();
this.setLayout(new BorderLayout());
TableColumnModel columnMode2 = testTable.getColumnModel();
int[] width2 = { 200 };
for (int i = 0; i < width2.length; i++) {
columnMode2.getColumn(i).setPreferredWidth(width2[i]);
scrollPane.getViewport().add(testTable);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
this.add(scrollPane, BorderLayout.CENTER);
class MyTableModel extends DefaultTableModel {
public List list = new ArrayList();
String titles[] = new String[] { "袨怓1", "袨怓2", "袨怓3", "袨怓4", "袨怓5", "袨怓6", "袨怓7", "袨怓8", "袨怓9", "袨怓10", "袨怓11",
"袨怓12", "袨怓13", "袨怓14", "袨怓15", "袨怓16", "袨怓17", "袨怓18", "袨怓19", "袨怓20", "袨怓21" };
String tabelName = "";
int type_head = 0;
int type_data = 1;
int type = 1;
public MyTableModel(int type) {
super();
this.type = type;
for (int i = 0; i < 50; i++) {
list.add(i);
public void setTabelName(String name) {
this.tabelName = name;
public int getRowCount() {
if (list != null) {
return list.size();
return 0;
public List getVector() {
return list;
public int getColumnCount() {
if (type == 0) {
return 1;
} else {
return titles.length;
public String getColumnName(int c) {
if (type == 0) {
return "head";
} else {
return titles[c];
public boolean isCellEditable(int nRow, int nCol) {
return false;
public Object getValueAt(int r, int c) {
if (list.size() == 0) {
return null;
switch (c) {
default:
if (type == 0) {
return r + " " + c + " test ";
} else {
return list.get(r) + " " + c;
public boolean isNotRepaint() {
return notRepaint;
public void setNotRepaint(boolean notRepaint) {
this.notRepaint = notRepaint;
public class TestPanel extends JPanel {
protected String title = "";
protected boolean needRepaint = false;
protected boolean isFirstOpen = true;
public String getTitle() {
return title;
public void setNeedRepaint(boolean flag) {
this.needRepaint = flag;
public boolean isNeedRepaint() {
return needRepaint;
public boolean isFirstOpen() {
return isFirstOpen;
public void setFirstOpen(boolean isFirstOpen) {
this.isFirstOpen = isFirstOpen;
public class TestJLableScreen extends TestPanel {
private static final long serialVersionUID = 1L;
private JLabel[] allLables = new JLabel[20];
private Timer timmer = new Timer(20, new ActionListener() {
public void actionPerformed(ActionEvent e) {
Random indexRandom = new Random();
final int index = indexRandom.nextInt(10);
Random valRandom = new Random();
final int val = valRandom.nextInt(600);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
TestJLableScreen.this.setNeedRepaint(true);
TestJLableScreen.this.update(index + "|" + val);
public TestJLableScreen(String title) {
this.title = title;
init();
public void startTime() {
timmer.start();
public String getTitle() {
return title;
public void update(String updateStr) {
String[] val = updateStr.split("\\|");
if (val.length == 2) {
int index = Integer.valueOf(val[0]);
allLables[index * 2 + 1].setText(val[1]);
public void init() {
this.setLayout(new GridLayout(10, 2));
boolean flag = true;
for (int i = 0; i < allLables.length; i++) {
allLables[i] = new JLabel() {
// public void setText(String text) {
// super.setText(text);
// // System.out.println(" setText " + getTitle() + " ; " + this.getName());
public void paint(Graphics g) {
super.paint(g);
// System.out.println(" paint " + getTitle() + " ; " + this.getName());
// public void repaint() {
// super.repaint();
// System.out.println(" repaint " + getTitle() + " ; " + this.getName());
allLables[i].setName("" + i);
if (i % 2 == 0) {
allLables[i].setText("Name " + i + " : ");
} else {
allLables[i].setOpaque(true);
if (flag) {
allLables[i].setBackground(Color.YELLOW);
flag = false;
} else {
allLables[i].setBackground(Color.CYAN);
flag = true;
allLables[i].setText(i * 8 + "");
for (int i = 0; i < allLables.length; i++) {
this.add(allLables[i]);
public class CustomeInternalFrame extends JInternalFrame {
protected TestPanel panel;
public CustomeInternalFrame() {
this("", false, false, false, false);
public CustomeInternalFrame(String title) {
this(title, false, false, false, false);
public CustomeInternalFrame(String title, boolean resizable) {
this(title, resizable, false, false, false);
public CustomeInternalFrame(String title, boolean resizable, boolean closable) {
this(title, resizable, closable, false, false);
public CustomeInternalFrame(String title, boolean resizable, boolean closable, boolean maximizable) {
this(title, resizable, closable, maximizable, false);
public CustomeInternalFrame(String title, boolean resizable, boolean closable, boolean maximizable,
boolean iconifiable) {
super(title, resizable, closable, maximizable, iconifiable);
public TestPanel getPanel() {
return panel;
public void setPanel(TestPanel panel) {
this.panel = panel;i had the same problem with buttons and it seemed that i overlayed my button with something else...
so check that out first do you put something on that excact place???
other problem i had was the VAJ one --> VisualAge for Java (terrible program)
it does strange tricks even when you don't use the drawing tool...
dunno 2 thoughts i had... check it out...
SeJo -
Problem with fireTableDataChanged in JTable
Hi everybody,
i have a really frustrating problem with Jtable. I created a class to display the jtable and a class that extends AbstactTableModel to use as its model. I can update my table after a fireTableDataChanged method in the class that extend the AbstractTableModel, but after implementing a ListSelectionListener to the class that displays the jtable, it gives a big bunch of errors in the console of my ide, when i remove it, it went back to normal without any errors.
Anyways, my program still can run without problem and the table still can refresh, just this bunch of errors when i clicked the button that calls the AbstactTableModel to perform a firetabledatachanged
anybody got this problem? how did you guys solve it?
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
at farm.EmployeesTblModel.getValueAt(EmployeesTblModel.java:58)
at farm.EmployeesTblView.rowEditDelete(EmployeesTblView.java:131)
at farm.EmployeesTblView$1.valueChanged(EmployeesTblView.java:106)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:388)
at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:398)
at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(DefaultListSelectionModel.java:559)
at javax.swing.DefaultListSelectionModel.clearSelection(DefaultListSelectionModel.java:403)
at javax.swing.JTable.clearSelection(JTable.java:2040)
at javax.swing.JTable.clearSelectionAndLeadAnchor(JTable.java:2048)
at javax.swing.JTable.sortedTableChanged(JTable.java:4098)
at javax.swing.JTable.tableChanged(JTable.java:4346)
at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:280)
at javax.swing.table.AbstractTableModel.fireTableDataChanged(AbstractTableModel.java:182)
at farm.EmployeesTblModel.updateData(EmployeesTblModel.java:42)
at farm.EmployeesTblView.updateData(EmployeesTblView.java:59)
at farm.EmployeesTbl.delete(EmployeesTbl.java:273)
at farm.FarmView.delEmpBtnActionPerformed(FarmView.java:1823)
at farm.FarmView.access$2200(FarmView.java:32)
at farm.FarmView$18.actionPerformed(FarmView.java:823)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)just this bunch of errors when i clicked the button that calls the AbstactTableModel to perform a firetabledatachangedWell, you should never have a button that invokes fireTableDataChanged.
The TableModel should be responsible for invoking those methods.
I suggest you look at the code for the DefaultTableModel for the proper way to write a TableModel. Basically you create methods to update the model. The model in turn fires the events to notify the view to repaint itself. -
How to outline selected cells during drag and drop in the jtable
Hi,
I have spent a lot of time to find out how to outline selected cells during drag in the jtable, but I did not find the answer.
Can anybody give me a tip, where to read more about this problem or even better, give an example...
I have the following situation:
1.Table has 10 rows and 10 columns
2.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION) and setCellSelectionEnabled(true)
3.user select 5 cells in 4th row (for example cell45,cell46,cell47,cell48 and cell49)
4.user starts dragging. During dragging an outline should be drawn. Outline should be a rectangular with width of 5 cells and height of one cell. Outline should move according to the mouse position.
5.rectangular disappears when dropped
Regards,
PrimozIn "createTransferable" you can create a drag image
which you can paint in "dragOver" and clear in "drop" method of DropTarget :
package dnd;
* DragDropJTableCellContents.java
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
public class DragDropJTableCellContents extends JFrame {
public DragDropJTableCellContents() {
setTitle("Drag and Drop JTable");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getContentPane().add(createTable("JTable"), BorderLayout.CENTER);
setSize(400, 300);
setLocationRelativeTo(null);
private JPanel createTable(String tableId) {
DefaultTableModel model = new DefaultTableModel();
for (int i = 0; i < 10; i++) {
model.addColumn("Column "+i);
for (int i = 0; i < 10; i++) {
String[] rowData = new String[10];
for (int j = 0; j < 10; j++) {
rowData[j] = tableId + " " + i + j;
model.addRow(rowData);
JTable table = new JTable(model);
table.getTableHeader().setReorderingAllowed(false);
table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
table.setCellSelectionEnabled(true);
JScrollPane scrollPane = new JScrollPane(table);
table.setDragEnabled(true);
TableTransferHandler th = new TableTransferHandler();
table.setTransferHandler(th);
table.setDropTarget(new TableDropTarget(th));
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JPanel panel = new JPanel(new BorderLayout());
panel.add(scrollPane);
panel.setBorder(BorderFactory.createTitledBorder(tableId));
return panel;
public static void main(String[] args) {
new DragDropJTableCellContents().setVisible(true);
abstract class StringTransferHandler extends TransferHandler {
public int dropAction;
protected abstract String exportString(JComponent c);
protected abstract void importString(JComponent c, String str);
@Override
protected Transferable createTransferable(JComponent c) {
return new StringSelection(exportString(c));
@Override
public int getSourceActions(JComponent c) {
return COPY;
@Override
public boolean importData(JComponent c, Transferable t) {
if (canImport(c, t.getTransferDataFlavors())) {
try {
String str = (String) t.getTransferData(DataFlavor.stringFlavor);
importString(c, str);
return true;
} catch (UnsupportedFlavorException ufe) {
} catch (IOException ioe) {
return false;
@Override
public boolean canImport(JComponent c, DataFlavor[] flavors) {
for (int ndx = 0; ndx < flavors.length; ndx++) {
if (DataFlavor.stringFlavor.equals(flavors[ndx])) {
return true;
return false;
class TableTransferHandler extends StringTransferHandler {
private int dragRow;
private int[] dragColumns;
private BufferedImage[] image;
private int row;
private int[] columns;
public JTable target;
@Override
protected Transferable createTransferable(JComponent c) {
JTable table = (JTable) c;
dragRow = table.getSelectedRow();
dragColumns = table.getSelectedColumns();
createDragImage(table);
return new StringSelection(exportString(c));
protected String exportString(JComponent c) {
JTable table = (JTable) c;
row = table.getSelectedRow();
columns = table.getSelectedColumns();
StringBuffer buff = new StringBuffer();
for (int j = 0; j < columns.length; j++) {
Object val = table.getValueAt(row, columns[j]);
buff.append(val == null ? "" : val.toString());
if (j != columns.length - 1) {
buff.append(",");
return buff.toString();
protected void importString(JComponent c, String str) {
target = (JTable) c;
DefaultTableModel model = (DefaultTableModel) target.getModel();
String[] values = str.split("\n");
int colCount = target.getSelectedColumn();
int max = target.getColumnCount();
for (int ndx = 0; ndx < values.length; ndx++) {
String[] data = values[ndx].split(",");
for (int i = 0; i < data.length; i++) {
String string = data;
if(colCount < max){
model.setValueAt(string, target.getSelectedRow(), colCount);
colCount++;
public BufferedImage[] getDragImage() {
return image;
private void createDragImage(JTable table) {
if (dragColumns != null) {
try {
image = new BufferedImage[dragColumns.length];
for (int i = 0; i < dragColumns.length; i++) {
Rectangle cellBounds = table.getCellRect(dragRow, i, true);
TableCellRenderer r = table.getCellRenderer(dragRow, i);
DefaultTableModel m = (DefaultTableModel) table.getModel();
JComponent lbl = (JComponent) r.getTableCellRendererComponent(table,
table.getValueAt(dragRow, dragColumns[i]), false, false, dragRow, i);
lbl.setBounds(cellBounds);
BufferedImage img = new BufferedImage(lbl.getWidth(), lbl.getHeight(),
BufferedImage.TYPE_INT_ARGB_PRE);
Graphics2D graphics = img.createGraphics();
graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1f));
lbl.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
lbl.paint(graphics);
graphics.dispose();
image[i] = img;
} catch (RuntimeException re) {
class TableDropTarget extends DropTarget {
private Insets autoscrollInsets = new Insets(20, 20, 20, 20);
private Rectangle rect2D = new Rectangle();
private TableTransferHandler handler;
public TableDropTarget(TableTransferHandler h) {
super();
this.handler = h;
@Override
public void dragOver(DropTargetDragEvent dtde) {
handler.dropAction = dtde.getDropAction();
JTable table = (JTable) dtde.getDropTargetContext().getComponent();
Point location = dtde.getLocation();
int row = table.rowAtPoint(location);
int column = table.columnAtPoint(location);
table.changeSelection(row, column, false, false);
paintImage(table, location);
autoscroll(table, location);
super.dragOver(dtde);
public void dragExit(DropTargetDragEvent dtde) {
clearImage((JTable) dtde.getDropTargetContext().getComponent());
super.dragExit(dtde);
@Override
public void drop(DropTargetDropEvent dtde) {
Transferable data = dtde.getTransferable();
JTable table = (JTable) dtde.getDropTargetContext().getComponent();
clearImage(table);
handler.importData(table, data);
super.drop(dtde);
private final void paintImage(JTable table, Point location) {
Point pt = new Point(location);
BufferedImage[] image = handler.getDragImage();
if (image != null) {
table.paintImmediately(rect2D.getBounds());
rect2D.setLocation(pt.x - 15, pt.y - 15);
int wRect2D = 0;
int hRect2D = 0;
for (int i = 0; i < image.length; i++) {
table.getGraphics().drawImage(image[i], pt.x - 15, pt.y - 15, table);
pt.x += image[i].getWidth();
if (hRect2D < image[i].getHeight()) {
hRect2D = image[i].getHeight();
wRect2D += image[i].getWidth();
rect2D.setSize(wRect2D, hRect2D);
private final void clearImage(JTable table) {
table.paintImmediately(rect2D.getBounds());
private Insets getAutoscrollInsets() {
return autoscrollInsets;
private void autoscroll(JTable table, Point cursorLocation) {
Insets insets = getAutoscrollInsets();
Rectangle outer = table.getVisibleRect();
Rectangle inner = new Rectangle(outer.x + insets.left,
outer.y + insets.top,
outer.width - (insets.left + insets.right),
outer.height - (insets.top + insets.bottom));
if (!inner.contains(cursorLocation)) {
Rectangle scrollRect = new Rectangle(cursorLocation.x - insets.left,
cursorLocation.y - insets.top,
insets.left + insets.right,
insets.top + insets.bottom);
table.scrollRectToVisible(scrollRect);
Edited by: Andre_Uhres on Nov 18, 2007 10:03 PM -
Must click then click and drag for JTable Drag and Drop
Hi All,
I've been using Java 1.4 to drag and drop data between two tables in our application. Basically I need to drag the data from individual rows of the source table and insert it into one of the cells in the new table. This works absolutely fine and has made a huge improvement to this portion of our app. I've included example source code below that does a similar thing by transferring data from one table and inserting it into another (it's quite big and also not as well done as the example in our real app but unfortunately I can't send the source for that).
The thing I've noticed though is that in order to start dragging data I need to click to select it and then press and hold the mouse button to start dragging, whereas under W**dows and just about every other OS you can just press and hold and start dragging straight away. If you try this with a JTable though it just changes the rows you have selected so the drag and drop works but feels a bit clunky and amateurish. I'd like to do something about this such that it works like Windows Explorer (or similar) where you can just press the mouse button and start dragging.
Any help would be greatly appreciated - and if anybody finds the code useful you're more than welcome to it. Note that the business end of this is CustomTransferHandler.java - this will show you how to insert data at a specific position in a JTable, it's a bit of a faff but not too bad once you've got it sussed.
Thanks,
Bart Read
===============================================================
TestFrame.java
* TestFrame.java
* Created on October 21, 2002, 4:59 PM
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.awt.event.*;
import java.util.TooManyListenersException;
import javax.swing.*;
* @author readb
public class TestFrame extends javax.swing.JFrame
private static final String [] NAMES = {
"John", "Geoff", "Madeleine", "Maria", "Flanders",
"Homer", "Marge", "Bart", "Lisa", "Weird Baby" };
private JTable source;
private JTable dest;
private MyTableModel sourceModel;
private MyTableModel destModel;
private Clipboard clipboard;
/** Creates a new instance of TestFrame */
public TestFrame()
clipboard = getToolkit().getSystemClipboard();
Container c = getContentPane();
c.setLayout( new BorderLayout( 40, 40 ) );
source = new MyJTable();
sourceModel = new MyTableModel();
source.setModel( sourceModel );
source.setDragEnabled( true );
CustomTransferHandler handler = new CustomTransferHandler( "Source handler" );
source.setTransferHandler( handler );
try
source.getDropTarget().addDropTargetListener( handler );
catch ( TooManyListenersException tmle )
tmle.printStackTrace();
dest = new MyJTable();
destModel = new MyTableModel();
dest.setModel( destModel );
dest.setDragEnabled( true );
handler = new CustomTransferHandler( "Dest handler" );
dest.setTransferHandler( handler );
try
dest.getDropTarget().addDropTargetListener( handler );
catch ( TooManyListenersException tmle )
tmle.printStackTrace();
c.add( new JScrollPane( source ), BorderLayout.WEST );
c.add( new JScrollPane( dest ), BorderLayout.EAST );
populate();
private void populate( MyTableModel model )
for ( int index = 0; index < NAMES.length; ++index )
model.setRow( index, new DataRow( index + 1, NAMES[ index ] ) );
private void populate()
populate( sourceModel );
populate( destModel );
public static void main( String [] args )
TestFrame app = new TestFrame();
app.addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent we )
System.exit( 0 );
app.pack();
app.setSize( 1000, 600 );
app.show();
private class MyJTable extends JTable
public boolean getScrollableTracksViewportHeight()
Component parent = getParent();
if (parent instanceof JViewport)
return parent.getHeight() > getPreferredSize().height;
return false;
}=====================================================================
MyTableModel.java
* MyTableModel.java
* Created on October 21, 2002, 4:43 PM
import java.util.ArrayList;
* @author readb
public class MyTableModel extends javax.swing.table.AbstractTableModel
private static final int NUMBER = 0;
private static final int NAME = 1;
private static final String [] COLUMN_HEADINGS = { "Number", "Name" };
private ArrayList data;
/** Creates a new instance of MyTableModel */
public MyTableModel()
super();
data = new ArrayList();
public int getColumnCount()
return COLUMN_HEADINGS.length;
public String getColumnName( int index )
return COLUMN_HEADINGS[ index ];
public Class getColumnClass( int index )
switch ( index )
case NUMBER:
return Integer.class;
case NAME:
return String.class;
default:
throw new IllegalArgumentException( "Illegal column index: " + index );
public int getRowCount()
return ( null == data ? 0 : data.size() );
public Object getValueAt( int row, int column )
DataRow dataRow = ( DataRow ) data.get( row );
switch ( column )
case NUMBER:
return new Integer( dataRow.getNumber() );
case NAME:
return dataRow.getName();
default:
throw new IllegalArgumentException( "Illegal column index: " + column );
public void addRow( DataRow row )
int rowIndex = data.size();
data.add( row );
fireTableRowsInserted( rowIndex, rowIndex );
public void addRows( DataRow [] rows )
int firstRow = data.size();
for ( int index = 0; index < rows.length; ++index )
data.add( rows[ index ] );
fireTableRowsInserted( firstRow, data.size() - 1 );
public void setRow( int index, DataRow row )
if ( index == data.size() )
data.add( row );
else
data.set( index, row );
fireTableRowsUpdated( index, index );
public void insertRows( int index, DataRow [] rows )
for ( int rowIndex = rows.length - 1; rowIndex >= 0; --rowIndex )
data.add( index, rows[ rowIndex ] );
fireTableRowsInserted( index, index + rows.length - 1 );
public DataRow getRow( int index )
return ( DataRow ) data.get( index );
public DataRow removeRow( int index )
DataRow retVal = ( DataRow ) data.remove( index );
fireTableRowsDeleted( index, index );
return retVal;
public boolean removeRow( DataRow row )
int index = data.indexOf( row );
boolean retVal = data.remove( row );
fireTableRowsDeleted( index, index );
return retVal;
public void removeRows( DataRow [] rows )
for ( int index = 0; index < rows.length; ++index )
data.remove( rows[ index ] );
fireTableDataChanged();
}=====================================================================
DataRow.java
* DataRow.java
* Created on October 21, 2002, 4:41 PM
import java.io.Serializable;
* @author readb
public class DataRow implements Serializable
private int number;
private String name;
/** Creates a new instance of DataRow */
public DataRow( int number, String name )
this.number = number;
this.name = name;
public int getNumber()
return number;
public String getName()
return name;
public String toString()
return String.valueOf( number ) + ": " + name;
}======================================================================
CustomTransferHandler.java
* CustomTransferHandler.java
* Created on October 22, 2002, 8:36 AM
import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.*;
import java.awt.event.InputEvent;
import java.io.IOException;
import java.util.Arrays;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JTable;
import javax.swing.TransferHandler;
* @author readb
public class CustomTransferHandler
extends TransferHandler
implements Transferable, ClipboardOwner, DropTargetListener
public static final DataFlavor ROW_ARRAY_FLAVOR = new DataFlavor( DataRow[].class, "Multiple rows of data" );
private String name;
private ImageIcon myIcon;
private DataRow [] data;
private boolean clipboardOwner = false;
private int rowIndex = -1;
/** Creates a new instance of CustomTransferHandler */
public CustomTransferHandler( String name )
this.name = name;
public boolean canImport( JComponent comp, DataFlavor [] transferFlavors )
System.err.println( "CustomTransferHandler::canImport" );
if ( comp instanceof JTable && ( ( JTable ) comp ).getModel() instanceof MyTableModel )
for ( int index = 0; index < transferFlavors.length; ++index )
if ( ! transferFlavors[ index ].equals( ROW_ARRAY_FLAVOR ) )
return false;
return true;
else
return false;
protected Transferable createTransferable( JComponent c )
System.err.println( "CustomTransferHandler::createTransferable" );
if ( ! ( c instanceof JTable ) || ! ( ( ( JTable ) c ).getModel() instanceof MyTableModel ) )
return null;
this.data = null;
JTable table = ( JTable ) c;
MyTableModel model = ( MyTableModel ) table.getModel();
Clipboard cb = table.getToolkit().getSystemClipboard();
cb.setContents( this, this );
clipboardOwner = true;
int [] selectedRows = table.getSelectedRows();
Arrays.sort( selectedRows );
data = new DataRow[ selectedRows.length ];
for ( int index = 0; index < data.length; ++index )
data[ index ] = model.getRow( selectedRows[ index ] );
return this;
public void exportAsDrag( JComponent comp, InputEvent e, int action )
super.exportAsDrag( comp, e, action );
Clipboard cb = comp.getToolkit().getSystemClipboard();
cb.setContents( this, this );
protected void exportDone( JComponent source, Transferable data, int action )
System.err.println( "CustomTransferHandler::exportDone" );
if ( TransferHandler.MOVE == action && source instanceof JTable && ( ( JTable ) source ).getModel() instanceof MyTableModel )
JTable table = ( JTable ) source;
MyTableModel model = ( MyTableModel ) table.getModel();
int [] selected = table.getSelectedRows();
for ( int index = selected.length - 1; index >= 0; --index )
model.removeRow( selected[ index ] );
public void exportToClipboard( JComponent comp, Clipboard clip, int action )
System.err.println( "CustomTransferHandler::exportToClipboard" );
public int getSourceActions( JComponent c )
System.err.println( "CustomTransferHandler::getSourceActions" );
if ( ( c instanceof JTable ) && ( ( JTable ) c ).getModel() instanceof MyTableModel )
return MOVE;
else
return NONE;
* I've commented this out because it doesn't appear to work in any case.
* The image isn't null but as far as I can tell this method is never
* invoked.
// public Icon getVisualRepresentation( Transferable t )
// System.err.println( "CustomTransferHandler::getVisualRepresentation" );
// if ( t instanceof CustomTransferHandler )
// if ( null == myIcon )
// try
// myIcon = new ImageIcon( getClass().getClassLoader().getResource( "dragimage.gif" ) );
// catch ( Exception e )
// System.err.println( "CustomTransferHandler::getVisualRepresentation: exception loading image" );
// e.printStackTrace();
// if ( null == myIcon )
// System.err.println( "CustomTransferHandler::getVisualRepresentation: myIcon is still NULL" );
// return myIcon;
// else
// return null;
public boolean importData( JComponent comp, Transferable t )
System.err.println( "CustomTransferHandler::importData" );
super.importData( comp, t );
if ( ! ( comp instanceof JTable ) )
return false;
if ( ! ( ( ( JTable ) comp ).getModel() instanceof MyTableModel ) )
return false;
if ( clipboardOwner )
return false;
if ( !t.isDataFlavorSupported( ROW_ARRAY_FLAVOR ) )
return false;
try
data = ( DataRow [] ) t.getTransferData( ROW_ARRAY_FLAVOR );
return true;
catch ( IOException ioe )
data = null;
return false;
catch ( UnsupportedFlavorException ufe )
data = null;
return false;
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException
System.err.println( "MyTransferable::getTransferData" );
if ( flavor.equals( ROW_ARRAY_FLAVOR ) )
return data;
else
throw new UnsupportedFlavorException( flavor );
public DataFlavor[] getTransferDataFlavors()
System.err.println( "MyTransferable::getTransferDataFlavors" );
DataFlavor [] flavors = new DataFlavor[ 1 ];
flavors[ 0 ] = ROW_ARRAY_FLAVOR;
return flavors;
public boolean isDataFlavorSupported( DataFlavor flavor )
System.err.println( "MyTransferable::isDataFlavorSupported" );
return flavor.equals( ROW_ARRAY_FLAVOR );
public void lostOwnership( Clipboard clipboard, Transferable transferable )
clipboardOwner = false;
/** Called while a drag operation is ongoing, when the mouse pointer enters
* the operable part of the drop site for the <code>DropTarget</code>
* registered with this listener.
* @param dtde the <code>DropTargetDragEvent</code>
public void dragEnter(DropTargetDragEvent dtde)
/** Called while a drag operation is ongoing, when the mouse pointer has
* exited the operable part of the drop site for the
* <code>DropTarget</code> registered with this listener.
* @param dte the <code>DropTargetEvent</code>
public void dragExit(DropTargetEvent dte)
/** Called when a drag operation is ongoing, while the mouse pointer is still
* over the operable part of the drop site for the <code>DropTarget</code>
* registered with this listener.
* @param dtde the <code>DropTargetDragEvent</code>
public void dragOver(DropTargetDragEvent dtde)
/** Called when the drag operation has terminated with a drop on
* the operable part of the drop site for the <code>DropTarget</code>
* registered with this listener.
* <p>
* This method is responsible for undertaking
* the transfer of the data associated with the
* gesture. The <code>DropTargetDropEvent</code>
* provides a means to obtain a <code>Transferable</code>
* object that represents the data object(s) to
* be transfered.<P>
* From this method, the <code>DropTargetListener</code>
* shall accept or reject the drop via the
* acceptDrop(int dropAction) or rejectDrop() methods of the
* <code>DropTargetDropEvent</code> parameter.
* <P>
* Subsequent to acceptDrop(), but not before,
* <code>DropTargetDropEvent</code>'s getTransferable()
* method may be invoked, and data transfer may be
* performed via the returned <code>Transferable</code>'s
* getTransferData() method.
* <P>
* At the completion of a drop, an implementation
* of this method is required to signal the success/failure
* of the drop by passing an appropriate
* <code>boolean</code> to the <code>DropTargetDropEvent</code>'s
* dropComplete(boolean success) method.
* <P>
* Note: The data transfer should be completed before the call to the
* <code>DropTargetDropEvent</code>'s dropComplete(boolean success) method.
* After that, a call to the getTransferData() method of the
* <code>Transferable</code> returned by
* <code>DropTargetDropEvent.getTransferable()</code> is guaranteed to
* succeed only if the data transfer is local; that is, only if
* <code>DropTargetDropEvent.isLocalTransfer()</code> returns
* <code>true</code>. Otherwise, the behavior of the call is
* implementation-dependent.
* <P>
* @param dtde the <code>DropTargetDropEvent</code>
public void drop(DropTargetDropEvent dtde)
System.err.println( "CustomTransferHandler::drop" );
Component c = dtde.getDropTargetContext().getDropTarget().getComponent();
if ( ! ( c instanceof JComponent ) )
dtde.rejectDrop();
return;
JComponent comp = ( JComponent ) c;
if ( ! ( c instanceof JTable ) || ! ( ( ( JTable ) c ).getModel() instanceof MyTableModel ) )
dtde.rejectDrop();
return;
dtde.acceptDrop( TransferHandler.MOVE );
// THIS is such a mess -- you can't do the following because
// getTransferable() throws an (undocumented) exception - what's that
// all about.
// Transferable t = dtde.getTransferable();
// if ( !t.isDataFlavourSupported( ROW_ARRAY_FLAVOR ) )
// dtde.rejectDrop();
// return false;
// TransferHandler handler = comp.getTransferHandler();
// if ( null == handler || ! handler.importData( comp, t ) )
// dtde.rejectDrop();
// return;
Point p = dtde.getLocation();
JTable table = ( JTable ) comp;
rowIndex = table.rowAtPoint( p );
// So you have to do this instead and use the data that's been
// stored in the data member via import data. Total mess.
if ( null == data )
dtde.rejectDrop();
return;
MyTableModel model = ( MyTableModel ) table.getModel();
if ( rowIndex == -1 )
model.addRows( data );
else
model.insertRows( rowIndex, data );
dtde.acceptDrop( TransferHandler.MOVE );
/** Called if the user has modified
* the current drop gesture.
* <P>
* @param dtde the <code>DropTargetDragEvent</code>
public void dropActionChanged(DropTargetDragEvent dtde)
}Hi again,
Well I've tried using the MouseListener / MouseMotionListener approach but it doesn't quite seem to work, although it does get the events correctly. I think the reason is that it doesn't interact correctly with the Java DnD machinery which is something that V.V hinted at. It's something that I may need to look into if / when I have more time available.
I have to say though that I haven't had any problems with scrollbars - we're making fairly heavy use of large tables and if you drag over a table with a scroll bar and move to the top or bottom then it scrolls as you would expect and allows you to drop the data where you like. For this situation I've used pretty much the same approach as for the toy example above except that I've implemented separate source and destination TransferHandlers (the source table is read-only, and it really doesn't make sense to allow people to drag from the destination table so I've essentially split the functionality of the example handler down the middle).
I'm not actually particularly in favour of messing too much with the mechanics of DnD, more because of lack of time than anything else. Guess I'll just have to put up with this for the moment. Doesn't help that DnD is so poorly documented by Sun.
Thanks for all your help.
Bart -
Problem in calling a Panel while calling a cell in a JTable using Mouse.
Hai there
I am working in swing and trying to create an application that is displaying data using Table. Now, I have a requirement where in upon click on one of the column in the table i wish to display a panel which contains JTable. I am unable to get this functionality. The same functionality is successfully handled if i call it from a text field instead of a cell in JTable.
Can any one suggest what the error could be??What data are you wanting to display in the JPanel? You can have the setColumnSelectionAllowed() method to true and that will allow you to select a column. Then you can use the getSelectedColumn() method to get the column number, then get all the row data for that column using the getValueAt(int row, int column) method and load it into your JPanel anyway you choose.
-
The look and feel values chosen for the JTable under windows do not feel right to me (albeit that I cannot find many examples of tables under windows).
I am trying to provide some workarounds that follow what most people expect to happen but am a little unclear on what should happen on some key presses for the JTable in windows look and feel
Space handling
From one of the MS windows books it suggests that the space key is a selection key, thus when you press space a row in a table should be selected (and when you press again it should deselect the row?)
The JList has functionality for the space key
q1) JTable should have space bar handling out of the box?
(space, CTRL+space, shift+space)
I have not seen this raised as a bug.
Enter handling
The enter key press is supposed to activate the default button
or commit a text field under edit.
F2 puts a field under edit
q2) Should the enter key put an editable cell under edit (same mouse action as single or double click to edit)?
q3) if not should the first enter key stop cell editing and a second press activate the default button, with only a single enter to activate default button if a cell is not under edit
Escape handling
The escape key will cancel editing of a cell that is under edit.
q4) should the event not be passed on when editing has been cancelled so that dialogs with a canel button can be dismissed
or
q5) should the first escape cancel editing while the second escape will action the escape action of the window.
Any links to "highly regarded" useability/look and feel sites would be helpful - sun does not appear to provide much on this subject
I've read both their l&f and advanced l&f books and they just scratch the surface of look and feel without much realworld appliance to real gui issues.
Might be useful to others: Some of the code that I was trying to create goes like....
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Event;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.KeyEvent;
import java.math.BigDecimal;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.CellEditor;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JViewport;
import javax.swing.KeyStroke;
import javax.swing.ListSelectionModel;
import javax.swing.RootPaneContainer;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
/** Provides utility methods for the JTable and JCSortableTable classes
* @author */
public final class JTableUtil
* Constructor for JCTableUtil.
private JTableUtil()
super();
/** will resize the last column of a table to fill the gap
* if the width of the columns is narrower than the width of the
* table
* @param table to act upon
static void resizeLastColumn(final JTable table)
TableColumn lastColumn = getLastVisibleColumn(table);
if (lastColumn != null)
int gap = getLastColumnGap(table);
if (gap > 0)
int newLastColumnWidth = gap + lastColumn.getWidth();
lastColumn.setWidth(newLastColumnWidth);
lastColumn.setPreferredWidth(newLastColumnWidth);
redrawTable(table);
* Determines if there is a gap between the last column in a table
* and the border of the table.
* Works if the table is drawn on the page or is in the
* viewport of a scroll pane.
* @param table to act upon
* @return the gap in pixels between last column and table edge.
static int getLastColumnGap(final JTable table)
int widthTable = getTableWidth(table);
int lastVisColIndex = getLastVisibleColumnIndex(table);
TableColumnModel columnModel = table.getColumnModel();
int widthColumns = columnModel.getTotalColumnWidth();
final TableColumn lastColumn = columnModel.getColumn(lastVisColIndex);
// gap is number of pixels from right hand edge of last column
// to right hand edge of the table
int gap = widthTable - widthColumns;
return gap;
* Determines the width of a table returning the table width if
* table is painted onto a panel, but if the table is painted
* into a scroll pane then it is the scroll pane viewport width that is returned
* This is to capture that the width of the table may be less than the
* width of the viewport - ie if there is a gap after the last column in a table.
* @param table to act upon
* @return the width of the table in pixels
static int getTableWidth(final JTable table)
int widthTable = table.getWidth();
Object tableParent = table.getParent();
JViewport tableViewPort = null;
if (tableParent instanceof JViewport)
tableViewPort = (JViewport) tableParent;
widthTable = tableViewPort.getWidth();
return widthTable;
/** Cause the table to redraw wether table is painted on a panel
* or in a scroll pane
* @param table to act upon
static void redrawTable(final JTable table)
Component tableRegion = table;
Component tableParent = table.getParent();
if (tableParent instanceof JViewport)
tableRegion = tableParent;
tableRegion.invalidate();
tableRegion.validate();
/** Determines the last (right most) column in a table with a width
* greater than 0
* @param table to act upon
* @return index (0 based) of the last visible column.
static int getLastVisibleColumnIndex(JTable table)
TableColumnModel columnModel = table.getColumnModel();
boolean found = false;
int columnIndex = columnModel.getColumnCount();
while (!found && columnIndex > 0)
columnIndex--;
if (columnModel.getColumn(columnIndex).getWidth() != 0)
found = true;
return columnIndex;
/** Determines the last (right most) column in a table with a width
* greater than 0
* @param table to act upon
* @return TableColumn - the last visible column.
static TableColumn getLastVisibleColumn(JTable table)
TableColumnModel columnModel = table.getColumnModel();
return columnModel.getColumn(getLastVisibleColumnIndex(table));
* Add the currency symbol to a JCTable/JCListTable column header
* e.g. 'Salary' becomes 'Salary (�)'
public static void addCurrencySymbol(JTable table, Object columnKey)
//@todo - update to work with JTable
TableColumnModel columnModel = table.getTableHeader().getColumnModel();
int columnIndex = columnModel.getColumnIndex(columnKey);
TableColumn column = columnModel.getColumn(columnIndex);
Object object = column.getHeaderValue();
if (object instanceof JLabel)
JLabel columnLabel = (JLabel) object;
SlacCurrency.getInstance().addCurrencySymbol(columnLabel);
else
// @todo log here ???
// is above correct - need to get the JLabel rendered from the table
// in the scroll pane?
/** Provides a sum of a column of BigDecimals
* @param tableModel model containing column that you wish to sum
* @param column the column that you wish to be summed, must contain numeric values and not strings
public static BigDecimal calculateTotalForColumn(final TableModel tableModel, final int column)
int numRows = tableModel.getRowCount();
BigDecimal total = new BigDecimal("0");
for (int row = 0; row < numRows; row++)
Object value = tableModel.getValueAt(row, column);
if (value instanceof BigDecimal)
BigDecimal decimalValue = (BigDecimal) value;
total = total.add(decimalValue);
else
//Logger.logGeneralFailure("", ErrorCodes.GUI_ERROR, this);
return total;
* Provides the swing setting JTable.AUTO_RESIZE_OFF.
* <p>
* In this situation if the width of the columns is smaller than the width
* of the table then there will be a gap after the last column.
* <p>
* This method will add a ComponentListener to the table and or
* scroll pane viewport so that there is no gap after the last column.
* @param table to act upon
public static void configureAutoResizeOff(final JTable table)
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
Component tableParent = table.getParent();
JViewport tableViewPort = null;
ComponentAdapter gapFiller = new ComponentAdapter()
public void componentResized(ComponentEvent e)
super.componentResized(e);
JTableUtil.resizeLastColumn(table);
table.addComponentListener(gapFiller);
if (tableParent instanceof JViewport)
tableViewPort = (JViewport) tableParent;
tableViewPort.addComponentListener(gapFiller);
/** Method provides fixes to provide standard handling for keyboard and mouse usage
* <ul>
* <li> spacebar - selection handling of rows that have focus emphasis see fixSpacebarHandling()
* <li> initial focus handling - table should give visual feedback when gaining focus
* <li>
* </ul>
* @param table - the table to add standards handling to
public static void setupKeyboardMouseHandling(JTable table)
fixTableGainsFocusOnFirstEntry(table);
fixSpacebarHandling(table);
fixCtrlSpacebarHandling(table);
fixShiftSpacebarHandling(table);
fixCtrlUpDownHandling(table);
fixFocusHighlight();
fixEscEnter(table);
/** Add fixes to the look and feel handling for a JTable
* Enter on a table will do different things depending on the mode of the table
* <p>
* if a cell is being edited then
* Enter will do what normally happens to a field under edit - ie stop the editing and commit
* Escape will cancel the editing
* <p>
* if a cell is not under edit then
* Enter will activate the default button
* Escape will activate the default cancel button (see FrameUtil.addEscapeKeyAction())
static void fixEscEnter(final JTable table)
final RootPaneContainer root = (RootPaneContainer)SwingUtilities.windowForComponent(table);
final String escapeKey = "escapeAction";
Action escapeAction = new AbstractAction(escapeKey)
public void actionPerformed(ActionEvent actionEvent)
if(table.isEditing())
CellEditor editor = table.getCellEditor(table.getEditingRow(), table.getEditingColumn());
editor.cancelCellEditing();
else
Window parentWindow = SwingUtilities.windowForComponent(table);
Action windowEscapeAction = FrameUtil.getEscapeKeyAction(root);
windowEscapeAction.actionPerformed(actionEvent);
final String enterKey = "enterAction";
Action enterAction = new AbstractAction(enterKey)
public void actionPerformed(ActionEvent actionEvent)
if(table.isEditing())
CellEditor editor = table.getCellEditor(table.getEditingRow(), table.getEditingColumn());
editor.stopCellEditing();
else
root.getRootPane().getDefaultButton().doClick();
InputMap inputMap = table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
table.getActionMap().put(escapeKey, escapeAction);
table.getActionMap().put(enterKey, enterAction);
inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), escapeKey);
inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), enterKey);
static void fixFocusHighlight()
Border focusCellHighlightBorder = new DashedLineBorder(Color.BLACK);
UIManager.put("Table.focusCellHighlightBorder", focusCellHighlightBorder);
/** If you do not setup a table to have a row selected then there is a bug where for example
* you use an accelerator key to put focus in the table and you get no visual feedback that
* the table has focus - ie no focus emphasis - dashed box
* @param table - the table to fix
static void fixTableGainsFocusOnFirstEntry(JTable table)
// for first time tabbing to table make sure that first cell has focus
// don't seem to need this fix under windows XP
table.getSelectionModel().removeSelectionInterval(0, 0);
/** fix spacebar handling
* java standards does not mention spacebar handling on a JTable but this is a windows
* standard feature and is also a feature on JList.
* Without spacebar handling on a JTable there would be no other keyboard handling that
* would allow you to select the current row.
* <p>
* Trying to follow windows standards since java does not list space bar handling for JTable.
* The following bahaviour can be seen in IBM code in project Java build path - tab libraries
* and in microsoft code in the administrative tools control panel dialog in windows XP
* <p>
* spacebar - select the current row without deselecting any others
* <p>
* handling should be fixed in merlin release 1.5
* see bug report http://developer.java.sun.com/developer/bugParade/bugs/4303294.html
static void fixSpacebarHandling(JTable table)
KeyStroke ksSpace = KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0, true);
final String ACTION_SPACE = "SPACE";
Action spaceAction = new AbstractAction(ACTION_SPACE)
public void actionPerformed(ActionEvent actionEvent)
ListSelectionModel selectModel =
((JTable) actionEvent.getSource()).getSelectionModel();
int currentRowIndex = selectModel.getAnchorSelectionIndex();
selectModel.addSelectionInterval(currentRowIndex, currentRowIndex);
table.getInputMap().put(ksSpace, ACTION_SPACE);
table.getActionMap().put(ACTION_SPACE, spaceAction);
/** fix ctrl + spacebar handling
* java standards does not mention spacebar handling on a JTable but this is a windows
* standard feature and is also a feature on JList.
* Without spacebar handling on a JTable there would be no other keyboard handling that
* would allow you to select the current row.
* <p>
* Trying to follow windows standards since java does not list space bar handling for JTable.
* The following bahaviour can be seen in IBM code in project Java build path - tab libraries
* and in microsoft code in the administrative tools control panel dialog in windows XP
* <p>
* ctrl + spacebar - toggle selection on the current row without deselecting any others
* <p>
* handling should be fixed in merlin release 1.5
* see bug report http://developer.java.sun.com/developer/bugParade/bugs/4303294.html
static void fixCtrlSpacebarHandling(JTable table)
KeyStroke ksCtrlSpace = KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, Event.CTRL_MASK, true);
final String ACTION_CTRL_SPACE = "CTRLSPACE";
Action ctrlSpaceAction = new AbstractAction(ACTION_CTRL_SPACE)
public void actionPerformed(ActionEvent actionEvent)
ListSelectionModel selectModel =
((JTable) actionEvent.getSource()).getSelectionModel();
int currentRowIndex = selectModel.getAnchorSelectionIndex();
boolean isCurrentRowSelected = selectModel.isSelectedIndex(currentRowIndex);
if (isCurrentRowSelected)
selectModel.removeSelectionInterval(currentRowIndex, currentRowIndex);
else
selectModel.addSelectionInterval(currentRowIndex, currentRowIndex);
table.getInputMap().put(ksCtrlSpace, ACTION_CTRL_SPACE);
table.getActionMap().put(ACTION_CTRL_SPACE, ctrlSpaceAction);
/** fix shift + spacebar handling
* java standards does not mention spacebar handling on a JTable but this is a windows
* standard feature and is also a feature on JList.
* Without spacebar handling on a JTable there would be no other keyboard handling that
* would allow you to select the current row.
* <p>
* Trying to follow windows standards since java does not list space bar handling for JTable.
* The following bahaviour can be seen in IBM code in project Java build path - tab libraries
* and in microsoft code in the administrative tools control panel dialog in windows XP
* <p>
* shift + spacebar - extend the selection from the anchor to the lead index.
* this might still be a bit funny in java 1.4.2 and code may need to be changed slightly
* <p>
* handling should be fixed in merlin release 1.5
* see bug report http://developer.java.sun.com/developer/bugParade/bugs/4303294.html
static void fixShiftSpacebarHandling(JTable table)
KeyStroke ksShiftSpace = KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, Event.SHIFT_MASK, true);
final String ACTION_SHIFT_SPACE = "SHIFTSPACE";
Action shiftSpaceAction = new AbstractAction(ACTION_SHIFT_SPACE)
public void actionPerformed(ActionEvent actionEvent)
ListSelectionModel selectModel =
((JTable) actionEvent.getSource()).getSelectionModel();
int currentRowIndex = selectModel.getAnchorSelectionIndex();
int startRowIndex = selectModel.getLeadSelectionIndex();
selectModel.setSelectionInterval(startRowIndex, currentRowIndex);
table.getInputMap().put(ksShiftSpace, ACTION_SHIFT_SPACE);
table.getActionMap().put(ACTION_SHIFT_SPACE, shiftSpaceAction);
/** fix ctrl + down or up handling - move focus emphasis up or down accordingly
* <p>
* handling should be fixed in merlin release 1.5
* see bug report http://developer.java.sun.com/developer/bugParade/bugs/4303294.html
static void fixCtrlUpDownHandling(JTable table)
final String ACTION_UP = "CTRLUP";
KeyStroke ksCtrlUp = KeyStroke.getKeyStroke(KeyEvent.VK_UP, Event.CTRL_MASK, true);
KeyStroke ksCtrlDown = KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, Event.CTRL_MASK, true);
Action ctrlUpAction = new CtrlUpDownAction(ACTION_UP, true);
final String ACTION_DOWN = "CTRLDOWN";
Action ctrlDownAction = new CtrlUpDownAction(ACTION_DOWN, false);
table.getInputMap().put(ksCtrlUp, ACTION_UP);
table.getActionMap().put(ACTION_UP, ctrlUpAction);
table.getInputMap().put(ksCtrlDown, ACTION_DOWN);
table.getActionMap().put(ACTION_DOWN, ctrlDownAction);
* Action for moving focus emphasis up or down
class CtrlUpDownAction extends AbstractAction
private boolean m_isUp = true;
/** Ctor controlling direction of focus emphasis
* @param name of the action
* @param isUp - true if dirction of action is up, else false
public CtrlUpDownAction(String name, boolean isUp)
super(name);
m_isUp = isUp;
/** Moves the focus emphasis
* @param actionEvent - see javax.swing.AbstractAction class for details
public void actionPerformed(ActionEvent actionEvent)
JTable table = (JTable) actionEvent.getSource();
ListSelectionModel selectModel = table.getSelectionModel();
int nextRowIndex =
getNextRowIndex(table.getRowCount(), selectModel.getAnchorSelectionIndex());
if (selectModel.isSelectedIndex(nextRowIndex))
selectModel.addSelectionInterval(nextRowIndex, nextRowIndex);
else
selectModel.removeSelectionInterval(nextRowIndex, nextRowIndex);
/** Gets the index of the next row depending on direction up or down
* @param rowCount - number of rows in the table
* @param currentRowIndex - index of the row that has focus emphasis
* @return the index of the next row
private int getNextRowIndex(int rowCount, int currentRowIndex)
int nextRowIndex = -1;
if (m_isUp && currentRowIndex > 0)
// emphasis moving up one row
nextRowIndex = currentRowIndex - 1;
else if (!m_isUp && currentRowIndex < (rowCount - 1))
// emphasis moving down one row
nextRowIndex = currentRowIndex + 1;
return nextRowIndex;
/** Draws a dashed line (well more of a dotted line)
* Used for eg drawing focus emphasis rectangle
* Class draws a rectangle of chosen colour overlaid with a dashed white line.
class DashedLineBorder extends LineBorder
private BasicStroke m_lineStroke = new BasicStroke();
private BasicStroke m_dashStroke =
new BasicStroke(
m_lineStroke.getLineWidth(),
BasicStroke.CAP_BUTT,//m_lineStroke.getEndCap(),
m_lineStroke.getLineJoin(),
m_lineStroke.getMiterLimit(),
new float[] { 1,1,1 },
0);
* Constructor for DashedLineBorder.
* @param color
public DashedLineBorder(Color color)
super(color);
* Constructor for DashedLineBorder.
* @param color
* @param thickness
public DashedLineBorder(Color color, int thickness)
super(color, thickness);
* Constructor for DashedLineBorder.
* @param color
* @param thickness
* @param roundedCorners
public DashedLineBorder(Color color, int thickness, boolean roundedCorners)
super(color, thickness, roundedCorners);
/** Similar to LineBorder's method but draws a line in the chosen colour
* before drawing a white dashed line on top of it
* @see javax.swing.border.Border#paintBorder(Component, Graphics, int, int, int, int)
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height)
Color oldColor = g.getColor();
int i;
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(m_lineStroke);
g.setColor(lineColor);
drawRect(g, x, y, width, height);
g2.setStroke(m_dashStroke);
g.setColor(Color.WHITE);
drawRect(g, x, y, width, height);
g.setColor(oldColor);
* @see javax.swing.border.Border#paintBorder(Component, Graphics, int, int, int, int)
private void drawRect(Graphics g, int x, int y, int width, int height)
// extracted from Java LineBorder.paintBorder
int i;
/// PENDING(klobad) How/should do we support Roundtangles?
for (i = 0; i < thickness; i++)
if (!roundedCorners)
g.drawRect(x + i, y + i, width - i - i - 1, height - i - i - 1);
else
g.drawRoundRect(
x + i,
y + i,
width - i - i - 1,
height - i - i - 1,
thickness,
thickness);
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Image;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.image.ImageProducer;
import java.io.IOException;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.RootPaneContainer;
* Provides static utility methods for JFrames.
public final class FrameUtil {
* No instances allowed. Just use the static methods.
private FrameUtil() {
super();
* Sets the button that is "activated" when the escape key is used.
* A bit like
* SwingUtilities.getRootPane(this).setDefaultButton(myButton);
* @param jFrame The JFrame or JDialog for which the escape key button should be set.
* @param button The button which should be clicked automatically when the escape key is pressed.
public static void setEscapeKeyButton(final RootPaneContainer jFrame, final JButton button) {
addEscapeKeyAction(jFrame, new AbstractAction() {
public void actionPerformed(final ActionEvent evt) {
button.doClick();
* Adds an action to the jframe's action map that is triggered by the Escape key.
* (If you just want to simulate a button click when the escape key is pressed then
* use setEscapeKeyButton.)
* A bit like
* SwingUtilities.getRootPane(this).setDefaultButton(myButton);
* @param jFrame The JFrame or JDialog for which the escape key action should be set.
* @param action The action that is executred when the escape key us pressed,
public static void addEscapeKeyAction(final RootPaneContainer jFrame, final Action action) {
String actionKey = "escapeAction";
KeyStroke escape = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
// using getRootPane rather than getContentPane, content pane doesn't work in all
// scenarios
InputMap inputMap = (jFrame.getRootPane()).getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
inputMap.put(escape, actionKey);
ActionMap actionMap = (jFrame.getRootPane()).getActionMap();
actionMap.put(actionKey, action);
* Finds the escape action for the given frame or dialog if one was added
* @param jFrame The JFrame or JDialog for which the escape key action should be set.
public static Action getEscapeKeyAction(final RootPaneContainer jFrame)
InputMap inputMap = (jFrame.getRootPane()).getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
KeyStroke escapeKeyStroke = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
ActionMap actionMap = (jFrame.getRootPane()).getActionMap();
Object actionKey = inputMap.get(escapeKeyStroke);
Action escapeAction = null;
if(actionKey != null)
escapeAction = actionMap.get(actionKey);
return escapeAction;From one of the MS windows books.....Going by the books, eh?
Well, apparently MS doesn't do so with Excel... Pressing space will simply trigger an edit!
q1) JTable should have space bar handling out of the box?
(space, CTRL+space, shift+space)
I have not seen this raised as a bug.A bug, no... a feature, maybe. Anyway, JTable provides most of the features needed for creating a table -- it's far from perfect..... adding support for CTRL+SPACE and SHIFT+SPACE is not all that hard to do.
q2) Should the enter key put an editable cell under edit and
q3) if not should the first enter key stop cell editing and a second press activate the default buttonIMHO, a good answer to your question can be found by running MS Excel and see how it's done.
The escape key will cancel editing of a cell that is under edit.and q4, q5
It should, as in Excel. But then, in Lotus 1-2-3, first escape will clear the edit buffer (unless it's empty) and the second escape will cancel editing. Who'is more programmatically correct (I don't know)?
;o)
V.V.
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