Re: Displaying a Modal JDialog with a background thread?

From:
Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups:
comp.lang.java.gui
Date:
Mon, 29 May 2006 14:09:49 -0700
Message-ID:
<AqJeg.334$vJ1.215@newsfe11.phx>
Leif Bloomquist wrote:

Hi all,

In my Swing application I have a JButton on a JPanel that tells the program
to save a large array of data to disk. The process takes about 10 seconds,
so I pop up a simple JDialog showing how far along the process is. I'm
creating and showing the JDialog, then using SwingWorker() to do the save as
a background thread so the UI thread doesn't hang. Inside construct() I'm
updating a JLabel on the JDialog with some descriptive text about where it
is in the process. This works perfectly.

But I have a bit of a Catch-22 situation. Since the JDialog isn't modal,
it's still possible to click the JButton "underneath" the JDialog and start
*another* thread doing exactly the same thing in parallel. Not good.

However, if I set the JDialog to be Modal, the main thread stops when
.setVisible() is called, of course. So the background thread never gets
started.

Any suggestions? Is there a better way to go about this?

Thanks much,
Leif


Sure, start the background worker thread and then open your modal dialog.

--

Knute Johnson
email s/nospam/knute/

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