Unable to put swing's JPopupMenu to SystemTray [duplicate] - swing

Question

Currently, the PopupMenu will show up when I right-click on the TrayIcon in the SystemTray. However, I want it to do the same when I left-click on the TrayIcon.
I thought I might accomplish this by using a mouseListener on the TrayIcon, but I don't know what method to invoke in the mouseClicked event to achieve the desired results.
icon = new TrayIcon(img, tooltip, popup);
icon.addMouseListener(
new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
popup.setEnabled(true);
}
});
Using the setEnabled() method does not make the popup menu appear when I left-click the TrayIcon. It actually has no noticeable effect. I'm wondering what method I should use in the mouseClicked() body in order to make the popup show up when it is left-clicked.

Answer 1

Basically, in your mouse listener, you need to determine which button was pressed (and optional, how many times).
The critical piece of code is this...
if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() == 1) { ... }
I've also included some additional code that makes sure the popup does not cover the task bar and is displayed within the viewable area of the screen (it's a nit pick of mine ;))
public class TestTrayIcon02 {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ex) {
}
try {
final TrayIcon ti = new TrayIcon(ImageIO.read(getClass().getResource("/Smiley.png")), "Have a nice day");
final JPopupMenu popup = new JPopupMenu();
JMenuItem mi = new JMenuItem("Get me some");
mi.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
SystemTray.getSystemTray().remove(ti);
System.exit(0);
}
});
popup.add(mi);
ti.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() == 1) {
Rectangle bounds = getSafeScreenBounds(e.getPoint());
Point point = e.getPoint();
int x = point.x;
int y = point.y;
if (y < bounds.y) {
y = bounds.y;
} else if (y > bounds.y + bounds.height) {
y = bounds.y + bounds.height;
}
if (x < bounds.x) {
x = bounds.x;
} else if (x > bounds.x + bounds.width) {
x = bounds.x + bounds.width;
}
if (x + popup.getPreferredSize().width > bounds.x + bounds.width) {
x = (bounds.x + bounds.width) - popup.getPreferredSize().width;
}
if (y + popup.getPreferredSize().height > bounds.y + bounds.height) {
y = (bounds.y + bounds.height) - popup.getPreferredSize().height;
}
popup.setLocation(x, y);
popup.setVisible(true);
}
}
});
SystemTray.getSystemTray().add(ti);
} catch (Exception ex) {
ex.printStackTrace();
}
}
});
}
public static Rectangle getSafeScreenBounds(Point pos) {
Rectangle bounds = getScreenBoundsAt(pos);
Insets insets = getScreenInsetsAt(pos);
bounds.x += insets.left;
bounds.y += insets.top;
bounds.width -= (insets.left + insets.right);
bounds.height -= (insets.top + insets.bottom);
return bounds;
}
public static Insets getScreenInsetsAt(Point pos) {
GraphicsDevice gd = getGraphicsDeviceAt(pos);
Insets insets = null;
if (gd != null) {
insets = Toolkit.getDefaultToolkit().getScreenInsets(gd.getDefaultConfiguration());
}
return insets;
}
public static Rectangle getScreenBoundsAt(Point pos) {
GraphicsDevice gd = getGraphicsDeviceAt(pos);
Rectangle bounds = null;
if (gd != null) {
bounds = gd.getDefaultConfiguration().getBounds();
}
return bounds;
}
public static GraphicsDevice getGraphicsDeviceAt(Point pos) {
GraphicsDevice device = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice lstGDs[] = ge.getScreenDevices();
ArrayList<GraphicsDevice> lstDevices = new ArrayList<GraphicsDevice>(lstGDs.length);
for (GraphicsDevice gd : lstGDs) {
GraphicsConfiguration gc = gd.getDefaultConfiguration();
Rectangle screenBounds = gc.getBounds();
if (screenBounds.contains(pos)) {
lstDevices.add(gd);
}
}
if (lstDevices.size() > 0) {
device = lstDevices.get(0);
} else {
device = ge.getDefaultScreenDevice();
}
return device;
}
}

Answer 2

What you're trying to do is apparently not possible:
You cannot show the PopupMenu with its show method since you need to specify a JComponent but your TrayIcon isn't one (weird enough though that TrayIcon still manages to do it, so apparently there is a way, don't ask me though..). So, as MadProgrammer suggested, you should try using JPopupMenu instead. Don't add it to your TrayIcon for that won't be possible, but display your JPopupMenu by adding a MouseListener to your TrayIcon. That should do the trick:
final TrayIcon tray = new TrayIcon( img, tooltip, null);
final JPopupMenu menu = new JPopupMenu();
... // your menu initialization.
tray.addMouseListener( new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent evt) {
menu.setLocation( evt.getPoint() );
menu.setVisible( true );
}
}