Re: Popup similar to Tooltip

From:

Eric Sosman <Eric.Sosman@sun.com>

Newsgroups:

comp.lang.java.programmer,comp.lang.java.gui,comp.lang.java.help

Date:

Mon, 25 Feb 2008 16:44:01 -0500

Message-ID:

<1203975768.656232@news1nwk>

RC wrote:

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.

--
Eric.Sosman@sun.com