// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@

package example;

import java.awt.*;
import java.util.stream.Stream;
import javax.swing.*;

public class MainPanel extends JPanel {
  private final JDialog dialog = new JDialog();
  private final Timer animator = new Timer(100, null);
  private final transient Image[] imglist = new Image[4];
  private final transient TrayIcon icon;
  private int idx;

  public MainPanel() {
    super();
    setPreferredSize(new Dimension(320, 240));

    if (!SystemTray.isSupported()) {
      throw new UnsupportedOperationException("SystemTray is not supported");
    }

    Class<?> clz = MainPanel.class;
    imglist[0] = new ImageIcon(clz.getResource("16x16.png")).getImage();
    imglist[1] = new ImageIcon(clz.getResource("16x16l.png")).getImage();
    imglist[2] = imglist[0];
    imglist[3] = new ImageIcon(clz.getResource("16x16r.png")).getImage();

    dialog.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);
    dialog.setSize(new Dimension(120, 100));
    dialog.setLocationRelativeTo(null);
    dialog.setTitle("TEST: JDialog");

    // TEST: icon = new TrayIcon(new ImageIcon(getClass().getResource("anime.gif")).getImage(), "TRAY", popup);
    icon = new TrayIcon(imglist[0], "TRAY", makeTrayPopupMenu());
    animator.addActionListener(e -> {
      icon.setImage(imglist[idx]);
      idx = (idx + 1) % imglist.length;
    });
    try {
      SystemTray.getSystemTray().add(icon);
    } catch (AWTException ex) {
      throw new IllegalStateException(ex);
    }
  }

  protected final PopupMenu makeTrayPopupMenu() {
    MenuItem item1 = new MenuItem("Open:Frame");
    item1.addActionListener(e -> {
      Container c = getTopLevelAncestor();
      if (c instanceof Window) {
        c.setVisible(true);
      }
    });

    MenuItem item2 = new MenuItem("Open:Dialog");
    item2.addActionListener(e -> dialog.setVisible(true));

    MenuItem item3 = new MenuItem("Animation:Start");
    item3.addActionListener(e -> animator.start());

    MenuItem item4 = new MenuItem("Animation:Stop");
    item4.addActionListener(e -> {
      animator.stop();
      icon.setImage(imglist[0]);
    });

    MenuItem item5 = new MenuItem("Exit");
    item5.addActionListener(e -> {
      animator.stop();
      SystemTray tray = SystemTray.getSystemTray();
      Stream.of(tray.getTrayIcons()).forEach(tray::remove);
      Stream.of(Frame.getFrames()).forEach(Frame::dispose);
    });

    PopupMenu popup = new PopupMenu();
    popup.add(item1);
    popup.add(item2);
    popup.addSeparator();
    popup.add(item3);
    popup.add(item4);
    popup.addSeparator();
    popup.add(item5);

    return popup;
  }

  public static void main(String[] args) {
    EventQueue.invokeLater(MainPanel::createAndShowGui);
  }

  private static void createAndShowGui() {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
      ex.printStackTrace();
      Toolkit.getDefaultToolkit().beep();
    }
    JFrame frame = new JFrame("@title@");
    // frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    frame.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);
    frame.getContentPane().add(new MainPanel());
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
}

@@ -175,16 +175,22 @@
 %0Apublic 
+final 
 class Ma
@@ -353,21 +353,20 @@
 age%5B%5D im
-glist
+ages
  = new I
@@ -438,21 +438,22 @@
 dx;%0A%0A  p
-ublic
+rivate
  MainPan
@@ -684,21 +684,20 @@
 ;%0A    im
-glist
+ages
 %5B0%5D = ne
@@ -756,21 +756,20 @@
 ;%0A    im
-glist
+ages
 %5B1%5D = ne
@@ -833,21 +833,20 @@
   im
-glist
+ages
 %5B2%5D = im
 glis
@@ -841,21 +841,20 @@
 %5B2%5D = im
-glist
+ages
 %5B0%5D;%0A   
@@ -856,21 +856,20 @@
 ;%0A    im
-glist
+ages
 %5B3%5D = ne
@@ -1191,17 +1191,20 @@
 ce(%22anim
-e
+ated
 .gif%22)).
@@ -1257,21 +1257,20 @@
 yIcon(im
-glist
+ages
 %5B0%5D, %22TR
@@ -1356,21 +1356,20 @@
 Image(im
-glist
+ages
 %5Bidx%5D);%0A
@@ -1394,21 +1394,20 @@
  1) %25 im
-glist
+ages
 .length;
@@ -1563,21 +1563,13 @@
   pr
-otected final
+ivate
  Pop
@@ -2156,13 +2156,12 @@
 e(im
-glist
+ages
 %5B0%5D)

change the constructor from public to private