Matthew,
I have some very similar code which I wrote some time
ago. Looking back at it I seem to have taken a belt
and braces approach. It looks a bit over the top now
looking back at it but it works without any long delays!
I call repaint on the newly added wizard pane, and it's
(new) parent, then I call revalidate on the parent.
It sounds as if you're very close to the same solution
anyway. The revalidate method is the key. It still
exists; see the API javadoc on JComponent.
Regards
Dave Wathen
Goldman Sachs Asset Management
3rd Floor, Procession House
55 Ludgate Hill
London EC4M 7JN
+44 (0)20-7774-2998
It is not necessary to understand things in order to argue about them.
(Caron de Beaumarchais)
-----Original Message-----
From: Matthew Bloch [mailto:[EMAIL PROTECTED]]
Sent: Thursday, March 01, 2001 12:29 AM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Update question
Hello; hope this is the correct list to use, I've done plenty of Swing
programing before and not found a problem with it, so I feel like I'm okay
on the basics. Can you keep the Cc: line intact when replying, as I'm not
a subscriber? cheers...
Anyhow, it's an problem to do with changing window components, but windows
not updating. I'm not sure why, since I've apparently done everything by
the book. I've written a class which extends JFrame and changes one of
its panels in response to button clicks (an MS-style `Wizard'). In the
button click event handler, I fire off this function which updates the
window's state:
---------------------8<------------------------------------------
private void updateState() {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
if (current != null)
topPanel.remove(current);
current = (WizardQuestion) sequence.whichState();
current.setPreferredSize(new Dimension(360, 384));
current.preDisplay();
topPanel.add(current, BorderLayout.CENTER);
descText.setText(current.descriptive());
descText.setEditable(false);
descText.setBackground(Color.lightGray);
setTitle(title+" : "+current.title());
if (sequence.isLast())
nextButton.setText("Finish");
else
nextButton.setText("Next >");
if (sequence.isFirst())
prevButton.hide();
else
prevButton.show();
invalidate();
repaint();
}
});
}
---------------------8<------------------------------------------
and the window doesn't update immediately, usually taking 4-5 seconds.
I've tried various combinations of invalidate(), repaint() on both the
JFrame and its contentPane , but nothing makes it update My understanding
was that this code executes in a `safe' part of the Swing event loop where
these effects wouldn't be apparent. I also notice there's a widely
documented revalidate() method for components which seems to be absent
since Swing 1.3. Can anybody fill me in?
cheers,
--
Matthew > http://www.soup-kitchen.net/
> ICQ 19482073
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