SwingUtilities.invokeLater

[Ike]

I have a JFrame, called from a JApplet.

Within that JFrame, I have:

final DownloadingDialog downloadingDialog = new DownloadingDialog(this);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
downloadingDialog.show();
}
});

// downloadingDialog doesnt do ANYTHING, just shows itself!
//later down in this same method which created downloadingDialog...

downloadingDialog.dispose();

However, the dialog....never disappears....it just keeps running modally? I
must not understand something about SwingUtilities.invokeLater such that I
cannot get this to actually dispose. What simple thing am I missing here?

Thanks Ike

 

[Robert Olofsson]

Ike ([email protected]) wrote:
: final DownloadingDialog downloadingDialog = new DownloadingDialog(this);
: SwingUtilities.invokeLater(new Runnable() {
: public void run() {
: downloadingDialog.show();
: }
: });

: // downloadingDialog doesnt do ANYTHING, just shows itself!
: //later down in this same method which created downloadingDialog...
: downloadingDialog.dispose();

Your code tries to dispose the dialog before the AWT thread has
had the chance to show it...

Put the dispose insde an invokeLater also and you should be more
ok.

I must however say that I suspect that the thread that calls
invokelater actually is the AWT thread which is bad since that
will make sure that showing the dialog happens when you have
finished your computation.
Hopefully you have a separate thread that does the correct
things, but check again please....

/robo

 

[Harald Hein]

Within that JFrame, I have:

final DownloadingDialog downloadingDialog = new
DownloadingDialog(this); SwingUtilities.invokeLater(new
Runnable() {
public void run() {
downloadingDialog.show();
}
});

Why? You can call show from outside of the EDT. And if you call show
from inside the EDT it doesn't matter, too. Calling show on a non-modal
window in the EDT doesn't block the EDT. If calling show on a modal
window in the EDT, the modal handling code in the dialog class takes
over event handling and keeps the GUI alive.