I spent last 10 whole days digging menu things in TrayIcon with no
success :((.
I have three guestions.

I can make JPopupWindow above MS-Windows task bar
( SwingUtilities.windowForComponent( JPupupMenu ).window.setAlwaysOnTop( true )  ) ,
but how to get keyboard focus/input ????

Looking back to normal PopupMenu ... when it pop up -> it blocks Event
Dispatch Thread (EDT) (even if I fire it manually .show() from new
Thread , I also tryed install new EventQueue ).
How to make non-blocking PopupMenu ? How to pop up via .show() without
"origin" ? ( MouseEvent of TrayIcon returns null in .getComponent() ).

I am using Java 6.0 b105 and u1 b03 at WinXP.

   URL url = getClass().getResource("/images/trayicon.gif");
   if(url == null) {
      return;
   }
   Image ii = new ImageIcon(url);

   PopupMenu pm = new PopupMenu("Tray Menu");
   MenuItem mi = new MenuItem("Item");
   mi.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
         System.out.println("item action");
      }
   });
   pm.add(mi);

This, what you wrote, is what I did in first minutes of my work.

Can I ask you to run following very simple program ?
It changes tray icon and JPanel background every 0.5 second. The
question is : is program continue to work when you popup tray icon
menu (right click) ?

//====================================
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class IsTrayIconMenuBlocking3
{
        public static void main( String[] args ) throws Exception
        {
                // --- JFrame & JPanel section
                final JPanel jp = new JPanel();

                JFrame jf = new JFrame();
                jf.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
                jf.add( jp );
                jf.setSize( 300 , 300 );
                jf.setVisible( true );

                // --- menu item action
                ActionListener itemExitAction = new ActionListener()
                {
                        public void actionPerformed( ActionEvent e )
                        {
                                System.out.println( "item action: exit" );
                                System.exit( 0 );
                        }
                };

                // --- popup menu
                PopupMenu pm = new PopupMenu( "Tray Menu" );
                MenuItem mi = new MenuItem( "Exit" );
                mi.addActionListener( itemExitAction);
                pm.add( mi );

                // --- system tray & tray icon
                final TrayIcon ti = new
TrayIcon( ((ImageIcon)UIManager.getIcon("OptionPane.questionIcon")).getImage() ,
"Tray Icon" , pm );
                SystemTray st = SystemTray.getSystemTray();
                ti.setImageAutoSize( true );
                st.add( ti );

                // --- color & icon changing loop
                final Image[] trayIcons = new Image[3];
                trayIcons[0] =
((ImageIcon)UIManager.getIcon("OptionPane.errorIcon")).getImage();
                trayIcons[1] =
((ImageIcon)UIManager.getIcon("OptionPane.warningIcon")).getImage();
                trayIcons[2] =
((ImageIcon)UIManager.getIcon("OptionPane.informationIcon")).getImage();

                Runnable colorChanger = new Runnable()
                {
                        private int counter = 0;
                        private int icon_no = 0;

                        public void run()
                        {
                                System.out.println( "Hello from EDT " + counter++ );

                                if( jp.getBackground() == Color.RED )
                                        jp.setBackground( Color.BLUE );
                                else
                                        jp.setBackground( Color.RED );

                                ti.setImage( trayIcons[icon_no++] );
                                if( icon_no == trayIcons.length ) icon_no = 0;
                        }
                };

                while( true )
                {
                        javax.swing.SwingUtilities.invokeLater( colorChanger);
                        try{Thread.sleep( 500 );} catch ( Exception e ){}
                }

        }

I am using WinXP and Java 6.0 b105 (or Java 6.0 u1 b03).
In my system all GUI operations stops while menu is on screen. I make
some works subclassing EventQueue. My suggestion is maby java goes in
some gui-lock while showing tray icon popup menu ?

thanks for help.

I am closing this subject.

My solution can be found at http://forums.java.net/jive/thread.jspa?threadID=23466&tstart=0
.

( java.net Forums  » Java Desktop Technologies  » Swing & AWT »
TrayIcon PopupMenu or JPopupMenu ?  )