JTable Cell Editor Problem

[sachin pathak]

I have created a TextField (NumericTextField) component which allows only numbers to bt typed in. Using this component I have created a TAbleEditorComponent (EvenNumberEditor) which allows only even numbers to be entered. I install EvenNumberEditor as a default editor for a testTable componenet which extends JTable.

This code is supposed to allow entry of only characters when the editing starts in the first column (0th) of the JTable. Evrything works fine if you properly invoke editing by either pressing f2 or by double-clicking on the Table Cell.

But problem arises when cell has focus, but editubg has not started and user starts typing directly. The NumericTextField seems to be not working. The TableCellEditor invoked is not using the NumericTextField component. User can type even text also for the field.

 package swingtrials;
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import java.util.*;
import javax.swing.event.*;
 
public class Frame1 extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  JPanel jPanel1 = new JPanel();
  String[] headerArray = new String[] {
           "col1","col2"};
 

 
String[][] dataArray = new String[][]{
      {"12","col2"},
      {"12","col2"},
      {"12","col2"},
      {"12","col2"},
      {"12","col2"},
      {"12","col2"},
      {"12","col2"},
      {"12","col2"},
  };
 DefaultTableModel model = new testModel(dataArray,headerArray);
 
  JTable jTable1 = new testTable(model);
 

 
  //Construct the frame
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
 
  //Component initialization
  private void jbInit() throws Exception {
    contentPane = (JPanel)this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    jPanel1.setLayout(null);
    jTable1.setBounds(new Rectangle(5, 13, 357, 168));
    contentPane.setFont(new java.awt.Font("Comic Sans MS", 0, 11));
    contentPane.setForeground(Color.red);
    jPanel1.setFont(new java.awt.Font("Comic Sans MS", 2, 13));
    contentPane.add(jPanel1, BorderLayout.CENTER);
 
    jTable1.getColumnModel().getColumn(0).setCellEditor(new EvenNumberEditor());
 
    jPanel1.add(jTable1, null);
  }
 
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
 
  public static void main(String[] args) {
    Frame1 f = new Frame1();
    f.show();
 
  }
}
 
class EvenNumberEditor
    extends AbstractCellEditor implements TableCellEditor{
  //following field is required to perform dependent validations
  //for e.g. A valid ref code is dependent on target number system.
  //this should be passed to constructor and initialised there.
  private TableModel parentTableModel;
  NumericTextField editorComponent;
  /**
   * NumSysEditor
   */
  public EvenNumberEditor() {
    editorComponent = new NumericTextField();
 
  }
 
  public boolean stopCellEditing() {
    System.out.println("EvenNumberEditor.stopCellEditing()");
 
    System.out.println("Validation Started");
    Object obj = getCellEditorValue();
    //here I need a way to get a value of the adjoining cell as well for validations.
 
    System.out.println("got value = "+obj);
    try{
      int newValue = Integer.parseInt(""+obj);
      if(newValue %2 != 0) {
            System.out.println("Validation ended");
       // super.stopCellEditing();
        return false;
      }
      else {
        System.out.println("Validation ended");
        super.stopCellEditing();
        return true;
      }
    }catch(NumberFormatException ne){
      System.out.println("ne = "+ne);
//      super.stopCellEditing();
      return false;
    }
  }
 
  public Component getTableCellEditorComponent(JTable table, Object value,
                                               boolean isSelected, int row,
                                               int column) {
    System.out.println("EvenNumberEditor.getTableCellEditorComponent(table, value, isSelected, row, column)");
    editorComponent = new NumericTextField();
    editorComponent.setText(""+value);
    return editorComponent;
 
  }
 
  public Object getCellEditorValue(){
    return editorComponent.getText();
 
  }
}
 

class testTable
    extends JTable {
  public testTable() {
  }
 
  public testTable(DefaultTableModel defaultTableModel) {
    super(defaultTableModel);
  }
 
  public boolean editCellAt(int row, int col) {
    System.out.println("testTable.editCellAt(row, col)");
    System.out.println("row = " + row);
    System.out.println("col = " + col);
    return super.editCellAt(row, col);
  }
 
  public boolean editCellAt(int row, int col, EventObject eventObject) {
    System.out.println("testTable.editCellAt(row, col, eventObject)");
    System.out.println("row = " + row);
    System.out.println("col = " + col);
 
    return super.editCellAt(row, col, eventObject);
  }
 
  public Component getEditorComponent() {
    return super.getEditorComponent();
  }
 
  public void editingCanceled(ChangeEvent changeEvent) {
    super.editingCanceled(changeEvent);
    System.out.println("testTable.editingCanceled(changeEvent)");
  }
 
  public void editingStopped(ChangeEvent changeEvent) {
    super.editingStopped(changeEvent);
    System.out.println("testTable.editingStopped(changeEvent)");
  }
 
  public void changeSelection(final int row, final int column, boolean toggle,
                              boolean extend) {
    System.out.println("testTable.changeSelection(row, column, toggle, extend)");
    super.changeSelection(row, column, toggle, extend);
    if (editCellAt(row, column)) getEditorComponent().requestFocusInWindow();
  }
 
}
 
class testModel extends DefaultTableModel{
  public testModel() {
  }
 
  public testModel(String[][] s, String[] strings) {
    super(s, strings);
  }
 
  public boolean isCellEditable(int row, int col) {
    System.out.println("testModel.isCellEditable(row, col)");
    System.out.println("row = " + row);
    System.out.println("col = " + col);
 
    return super.isCellEditable(row,col);
 
  }
 
  public void setValueAt(Object object, int row, int col) {
    System.out.println("testModel.setValueAt(object, row, col)");
    System.out.println("object = "+object);
    System.out.println("row = "+row);
    System.out.println("col = "+col);
 
    super.setValueAt(object,row,col);
 

  }
}
 
class NumericTextField
   extends JTextField {
 
 public NumericTextField() {
   super();
//    System.out.println("NumericTextField.NumericTextField()");
   this.addKeyListener(new KeyAdapter() {
     public void keyTyped(KeyEvent ke) {
       int typed = ke.getKeyChar();
//        System.out.println("NumericTextField.keyTyped(ke)");
       if ( (typed >= KeyEvent.VK_0 && typed <= KeyEvent.VK_9)
           || typed == KeyEvent.VK_BACK_SPACE
           || typed == KeyEvent.VK_LEFT
           || typed == KeyEvent.VK_RIGHT
           || typed == KeyEvent.VK_DELETE
           || typed == KeyEvent.VK_HOME
           || typed == KeyEvent.VK_ENTER
           ) {
 
         super.keyTyped(ke);
         return;
       }
       else {
         ke.consume();
       }
     }
 
   });
 
 } // End NumericTextField constructor
 
}
 

 
 

Can somebody please help out ??

Thanks in advance
Sachin

[luo ware]

jTable1.setFocusable(false);
may help u