Keeping toolbar button pressed when displaying a popupmenu beneath it

Question

I have written a custom widget - the drop down button. We can find examples of this widget all over the place - for eg. IE back button, Mail button, JBuilder run button etc.
The problem is this:
when the arrow button is pressed I display the popupmenu. Now, I need the button to hold its "pressed" state and appear accordingly while the popup menu is visible.
          arrowButton.addMouseListener(new MouseAdapter(){
               public void mousePressed(MouseEvent e)
                    showPopup();
Any ideas?

Answer 1

Here is your SSCE. Feel free to compile and run it. It will bring up a JFrame with toolbar buttons that show what I was talking about.
Note that the non popup buttons appear pressed when the mouse is kept pressed on them. Not so for the popup ones.
I cannot use an actionListener instead of mouse listener while displaying the popups because I need the popup to be visible with the first press of the mouse, not the first release (just like a combo-box)
import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.JToggleButton;
import javax.swing.JToolBar;
import javax.swing.UIManager;
public class Main3 {
     static JFrame frame = new JFrame("Test");
     static JToolBar toolBar = null;
     * @param args
     public static void main(String[] args)
          try
               UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
               toolBar = new JToolBar();
               toolBar.setFloatable(false);
               toolBar.setRollover(true);
               initToolBar();
               frame.getContentPane().add(toolBar, BorderLayout.NORTH);
               frame.pack();
               frame.setSize(800,600);
               frame.setVisible(true);
          catch (Exception ex)
               ex.printStackTrace();
     private static void initToolBar()
          final JPopupMenu popupMenu = new JPopupMenu();
          popupMenu.add(new JMenuItem("hello"));
          popupMenu.add(new JMenuItem("world"));
          final JButton button = new JButton("Popup JButton");
          button.addMouseListener(new MouseAdapter(){
               public void mousePressed(MouseEvent e)
                    popupMenu.show(button,0,button.getHeight());
          final JToggleButton toggleButton = new JToggleButton("Popup JToggleButton");
          toggleButton.addMouseListener(new MouseAdapter(){
               public void mousePressed(MouseEvent e)
                    popupMenu.show(toggleButton,0,toggleButton.getHeight());
          final JButton nonPopupButton = new JButton("No Popup JButton");
          nonPopupButton.addMouseListener(new MouseAdapter(){
               public void mousePressed(MouseEvent e)
                    System.out.println("Non popup button pressed");
          final JToggleButton nonPopupToggleButton = new JToggleButton("No Popup JToggleButton");
          nonPopupToggleButton.addMouseListener(new MouseAdapter(){
               public void mousePressed(MouseEvent e)
                    System.out.println("Non popup toggle button pressed");
          toolBar.add(button);
          toolBar.addSeparator();
          toolBar.add(toggleButton);
          toolBar.addSeparator();
          toolBar.add(nonPopupButton);
          toolBar.addSeparator();
          toolBar.add(nonPopupToggleButton);
}