Popup similar to Tooltip

[RC]

I want a simple popup for few seconds

Popup popup = new Popup(null, new JLabel("Done"), 10, 10);
popup.show();

try {
Thread.sleep(2000);
} catch (InterruptedException ie) {
}
popup.hide();

Everything is OK except I don't see the word "Done" in the label.
If I comment out the lines for try, Thread.sleep(###) and catch
Then I can see the word "Done in the label, then I can't make the popup
for few seconds.

Anyone knows why the word "Done" won't show up if I use Thread.sleep?
Any idea how do I fix the problem?

I don't need JProgressBar nor JMonitor for my simple application.
I want similar to the Tooltip popup for few seconds, but without
move the mouse pointer to a particular JComponent.

Thank you in advance!

 

[Eric Sosman]

I want a simple popup for few seconds

Popup popup = new Popup(null, new JLabel("Done"), 10, 10);
popup.show();

try {
Thread.sleep(2000);
} catch (InterruptedException ie) {
}
popup.hide();

Everything is OK except I don't see the word "Done" in the label.
If I comment out the lines for try, Thread.sleep(###) and catch
Then I can see the word "Done in the label, then I can't make the popup
for few seconds.

Anyone knows why the word "Done" won't show up if I use Thread.sleep?

You're probably doing the whole thing on the event
dispatching thread, which means the entire GUI stalls
while you're in sleep(). Presumably, it stalls just a
moment or two before the text would have become visible,
and when sleep() returns you tear down the popup before
the text has a chance to finish painting.

> Any idea how do I fix the problem?

Do your sleeping on a separate thread, letting the
EDT run without interruption. In your separate thread,
use SwingUtilities.invokeLater() to do things to the GUI.

 

[Daniel Pitts]

You're probably doing the whole thing on the event
dispatching thread, which means the entire GUI stalls
while you're in sleep(). Presumably, it stalls just a
moment or two before the text would have become visible,
and when sleep() returns you tear down the popup before
the text has a chance to finish painting.


Do your sleeping on a separate thread, letting the
EDT run without interruption. In your separate thread,
use SwingUtilities.invokeLater() to do things to the GUI.

Actually, I suggest using a Timer task instead of Thread.sleep in any case.

 

[RC]

Actually, I suggest using a Timer task instead of Thread.sleep in any case.

Two thumbs up!

 

[Roedy Green]

try {
Thread.sleep(2000);
} catch (InterruptedException ie) {
}
popup.hide();

your problem is you made the Swing thread sleep, so it can't do any
painting work, i.e. serving the event queue.

See http://mindprod.com/jgloss/timer.html
http://mindprod.com/jgloss/sleep.html