Question

I am using a TableCellEditor For my column (ButtonColumns) as follows.
When i enter the down key the key event associated with the Jtable not fired . Please guide me regarding this obstacle, Los of Thanks in advance. The below SSCCE is as follows

class ButtonEditor_Utility extends DefaultCellEditor {

protected JButton button;



public ButtonEditor_Utility() {
button.setActionCommand(tableName);
button.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent e) {
            fireEditingStopped();
        }
    });
}

public Component getTableCellEditorComponent(JTable table, Object value,
        boolean isSelected, int row, int column) {
    if (isSelected) {
        button.setForeground(table.getSelectionForeground());
        button.setBackground(table.getSelectionBackground());
    } else {
        button.setForeground(table.getForeground());
        button.setBackground(table.getBackground());
    }

    label = (value == null) ? "" : value.toString();
    button.setText(label);
    isPushed = true;
    return button;
}



public boolean stopCellEditing() {
    isPushed = false;
    return super.stopCellEditing();
}

protected void fireEditingStopped() {
    super.fireEditingStopped();
}

}

 Class Test extent JFframe{

  public void    AddButtonColumn(){
 tblDetailInfo.getColumn(1).setCellEditor(
 new ButtonEditor_Utility(new JCheckBox(), this, 1, selectedRow,    this,null, "TestDB"));}

// Below Event is not responding on the Down Key
//whose key code is 40

    private void tblDetailInfoKeyPressed(java.awt.event.KeyEvent evt){                                         
    // TODO add your handling code here:
    if (evt.getKeyCode() == 40) {

        int rowId = tblDetailInfo.getRowCount() - 1;

        setSelectedRow(rowId);
        tblDetailInfo.setCellSelectionEnabled(true);
        tblDetailInfo.changeSelection(rowId, 0, false, false);
        tblDetailInfo.requestFocus();
        tblDetailInfo.scrollRectToVisible(new Rectangle(tblDetailInfo.getCellRect(rowId, 0, true)));
        AddDetailRow();

    }
}  

   private void formWindowOpened(java.awt.event.WindowEvent evt){                      AddButtonColumn(); }

public static void main(String args[]) {
    java.awt.EventQueue.invokeLater(new Runnable() {

        public void run() {

            Test test = new Test();


            test.setVisible(true);
        }
    });
} }

}

Answer 1

Instead of trying to force a JLabel and a KeyEvent into service as a table cell editor, use an actual TableCellEditor such as @camickr’s ButtonColumn. This TableTest illustrates one way to use ButtonColumn in a JTable. The advantage is that you get all the familiar key bindings for navigation (arrow keys) and activation (space key).