setWindowOpaque causes problems at windows login.

[fwilliams]

Hi all,

Ii have an issue with setWindowOpaque(frame, false)l

I have a JFrame which is something like a Toolbar with shortcuts on it that when clicked will execute an application in a Process. The Toolbar by requirement needs to have rounded corners so we set the JFrame to opaque = false then add a background image so that we have perfectly antialiased rounded corners. Works fantastic until we lock the workstation and log back in only to find an empty toolbar with a white background. We can minimize the Toolbar and it updates / refreshes the UI and as well when clicking the buttons on the toolbar they update. If I comment out the line of code that sets the window none opaque we don't get these issues.

This can be easily replicated by creating a JFrame like so..

public void init () {
JFrame frame = new JFrame();
JPanel panel = new JPanel() {
public void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D)g;
g2d.drawImage(image, 0, 0, null);
}
}
panel.setSize(200, 200);
pamel.setLayout(null);
frame.setContentPane(panel);
AWTutilities.setWindowOpaque(frame, false);
frame.setVisible(true);
}

now lock your workstation and log back in again. You should see a sqare shape in your desktop which isn't updating the UI. If anyone has seen this issue before I would really appreciate a work around or a fix..

thanks

[DarrylBurke]

Cross poster
Swing - setWindowOpaque and AWTUtilities questions

db

[fwilliams]

Darryl is absolutely right...

If anyone has any answers to my problem please just update the thread

Swing - setWindowOpaque and AWTUtilities questions

Many thanks