🚀 go-pugleaf

 To All,

 Attached is a test class that I created to demonstrate the problems that we
 have been investigating regarding field traversal of Swing components. It
 seems that when a JTable is contained with a JScrollPane, the user must use
 the TAB key twice in order to get the JTable into focus. I discovered that if
 the JTable is placed into a JPanel and then the JPanel is placed into the
 JScrollPane, the user only has to hit the TAB key once.

 // Beginning of TabTestPanel Class
 import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
 import javax.swing.event.*;
 import javax.swing.table.*;

 import com.indcomp.foundation.*;

 public class TabTestPanel extends JPanel
 {
     JScrollPane scrollPane = null;
     JTextField field = new JTextField( 10 );
     JTable table = null;
     JPanel innerPanel = null;

     // FocusListener for use by all components
     FocusListener focusListener = new FocusEventHandler();

  /**  * Creates a new instance.  */  public TabTestPanel()  {	// Setup a
JTable	TableModel dataModel = new AbstractTableModel() {  public int
getColumnCount() { return 5; }	public int getRowCount() { return 4;}  public
Object getValueAt(int row, int col) { return new String( row + ", " + col );
}  };

         table = new JTable( dataModel );

         /*
         * Add JTable to JScrollPane
         *
         * Test 1: This test consists of a JTable contained in a ScrollPane.
         *
         * Test 2: This test consists of a JTable contained in a JPanel
         * and then added to a ScrollPane.
         *
         * Test 3: This test code will print the parent hierarchy from the
         * JTree upwards.
         *
         * NOTE: For the following tests, comment out comment marks
         * for the test to perform. Then uncomment the comment marks for
         * the test to disable.
         */

         // Test 1: ScrollPane->JTable
         // DOES NOT WORK!!!
 ///*
         scrollPane = new JScrollPane( table );
 //*/

         // Test 2: ScrollPane->JPanel->JTable
         // WORKS!!!
 /*
         innerPanel = new JPanel();
         innerPanel.add( table );
         innerPanel.addFocusListener( focusListener );
         scrollPane = new JScrollPane( innerPanel );
 */

         // Assign FocusListener to all components
         field.addFocusListener( focusListener );
         scrollPane.addFocusListener( focusListener );
         scrollPane.getViewport().addFocusListener( focusListener );
         table.addFocusListener( focusListener );

         // Add JTextField and JScrollPane to JPanel
         add( field );
         add( scrollPane );

         // Test 3: List parents of JTable
 /*
         System.out.println( "\nParents of JTable..." );
         printParentOfJComponent( table );
 */
     }

     private void printParentOfJComponent( JComponent jComponent )
     {
         if( jComponent == null )
             return;

         Component parent = jComponent.getParent();
         if( (parent != null) && (parent instanceof JComponent) )
         {
             System.out.println( "\t" + parent.getClass().getName() );
             printParentOfJComponent( (JComponent)parent );
         }
     }

 //
 // Begin - Inner classes
 //
     /**
      * Class to handle focus events.
      */
     private class FocusEventHandler extends FocusAdapter
     {
         /**
          * Invoked when a component gains the keyboard focus.
         */
         public void focusGained(FocusEvent e)
         {
             System.out.println( "\nTabTestPanel:FocusEventHandler.focusGained
 for " + ((JComponent)e.getComponent()).getClass().getName() );
         }

  /**  * Invoked when a component loses the keyboard focus.  */  public void
focusLost(FocusEvent e)  {  System.out.println(
"TabTestPanel:FocusEventHandler.focusLost for " + 
((JComponent)e.getComponent()).getClass().getName() );	}

     }
     //
     // End - Inner classes
     //

     /**
      * Test code.
      *
      * @param args String array of command line arguments.
      */
     public static void main( String[] args )
     {
         JFrame frame = new JFrame( "Test" );

         frame.getContentPane().add( new TabTestPanel() );
         frame.pack();
         frame.setVisible( true );
     }

 }
 // End of TabTestPanel Class

 If anyone has some ideas about this problem, please let me know.

 ----------------------------------
 Scott Lavender
 ICC/GR Software
 100 Deerfield Point
 12725 Morris Road, Suite 300
 Alpharetta, GA 30004
 ----------------------------------
 Voice: 770-610-4166
 Fax: 770-475-5126
 Email: lavenders@genrad.com
 ----------------------------------

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