How to getFocus in a ComboBox without choosing the inside data?

Question

How to getFocus in a ComboBox without choosing the inside data? Once I clicked on the ComboBox, I couldnt get the focus unless I choose the data inside. Although I had tried with many different types listeners, but still couldnt get it. Could anyone help me???

Answer 1

It is easier to work with the JComboBox in 1.4 for what you want to do.
But try this and see if it works for you. I added a FocusListener to all the other components on the panel, and had them close the combo box popup list. Now, if another component previously had the focus, it would take 2 clicks to have the combo box's list pop up. It's quite round-about, but it seems to work.
I also printed a message on the console.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
public class ComboBoxPopupTest
   public static void main( String [] args )
      final JComboBox comboBox = new JComboBox( new Object [] { "one", "two",
                                       "three", "four" } );
      JButton button = new JButton( "huh" );
      JButton button2 = new JButton( "Yo, baby!" );
      final JPanel panel = new JPanel();
      final Runnable hidePopup =
         new Runnable()
            public void run()
               // This method is deprecated in 1.4.
               // But you won't need it in 1.4 anyway...
               Component comp = SwingUtilities.findFocusOwner(panel);
               if ( comp != null )
                  if ( comp.getClass().toString().indexOf("ComboBox") > -1 )
                     comboBox.setPopupVisible( false );
                     System.out.println( "helloooo comobox" );
         }; // end the Runnable
      FocusListener focusListener = new FocusAdapter() {
         public void focusLost( FocusEvent evt )
           SwingUtilities.invokeLater( hidePopup );
      // In Java 1.4, just add a focus listener to the combo box
      // instead of adding it to all the other components.
      button.addFocusListener( focusListener );
      button2.addFocusListener( focusListener );
      panel.add( comboBox );
      panel.add( button );
      panel.add( button2 );
      JFrame frame = new JFrame( "Hello" );
      frame.getContentPane().add( panel, BorderLayout.CENTER );
      frame.setSize( 400, 300 );
      frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
      frame.setVisible( true );
}Tell me if that works for you.