How to paint a Custom Cell while you are editing on adjacent Cell in JTabl

Question

Hi All,
I have two Columns in my Custom Table . Both Two Columns are Custom Cell Editors/Renderers.
I have made UI such that Column1 is Label , Column 2 is TextBox / Combo/ UI Input any
My Custom Table View when i edit some value against Max Conn. it should display Blue
=================================
Column A | Column B
==================================
Timeout | some_unchanged_value
*{color:#0000ff}Session{color}* | some_unchanged_value
Log File | some_unchanged_value
===================================
My issue is when i start typing in my Custom Editor suppose i Type /invoke Edtir of Index 2, Column 2 font should become Blue.
It becomes blue only when i debug this issue it perfectly works, without Debugger it doesnt changes the Font
MyDefaultRenderer is my Custom renderer - I have set Foregroud Color as BLUE
NOTE:_
In run method if table.repaint() instead of single renderer:
It turns Blue when i make call on table.repaint() methosd but i feel that repainting full table on every key Stroke should not be very good programming. Whats is more appropriate way?
I want to repaint only that particular cell against which i change the Value
    private class MyDefaultEditor extends AbstractCellEditor implements TableCellEditor {
        private JTextField txtField = null;
        private int rowIndex;
        public MyDefaultEditor() {
            txtField = new JTextField();
            txtField.addKeyListener(new KeyAdapter() {
                @Override
                public void keyTyped(KeyEvent e) {
                    super.keyTyped(e);
                    System.out.println("########### Hello This is MyDefaultEditor");
              SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                              // Call Renderer adjacentt to input to turn Blue (Is this Valid Code ??)
                            MyDefaultRenderer defRen = (MyDefaultRenderer) thisTable.getCellRenderer(activeRowIndex, 0);
                            defRen.paintMe();
          // table.repaint() works for me but i dont want to call it on evey ket type, that will be Heave rite???
        public Component getTableCellEditorComponent(JTable table,
                Object value, boolean isSelected, int row, int column) {
            rowIndex = row;
            String valStr = "";
            if (value != null && value instanceof String) {
                valStr = value.toString();
            txtField.repaint();
            return txtField;
        public Object getCellEditorValue() {
            return txtField.getText();
    }Edited by: Shubhadeep on Jun 27, 2009 1:58 AM
Edited by: Shubhadeep on Jun 27, 2009 2:01 AM
Edited by: Shubhadeep on Jun 27, 2009 2:06 AM
Edited by: Shubhadeep on Jun 27, 2009 2:12 AM

Answer 1

Well, I think you need to add a custom renderer to the first column. The renderer would check if the table.isEditing(). If it is and the editing is done on the same row, then you set the font color blue, otherwise you use the default font color.
Then the next question is how do you repaint the cell. Well you can use the table.repaint(Rectangle) method. You can get the Rectangle to repaint by using the table.getCellRect(...) method.
Finally, you need to know when to repaint the cell. Well a PropertyChangeEvent is fired when a cell starts and stops editing. So you only need to handle these events. Don't use a KeyListener. The PropertyChangeListener you add to the table might be something like:
public void propertyChange(PropertyChangeEvent e)
     if ("tableCellEditor".equals(e.getPropertyName()))
          if (table.isEditing())
               processEditingStarted();
          else
               processEditingStopped();
}So when editing is started you need to determine the "adjacent" cell you want to repaint to the blue font is used. You would save the cell Rectangle so you can restore the font when editing is stopped.