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  1. #1
    fwilliams is offline Member
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    Angry setWindowOpaque causes problems at windows login.

    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

  2. #2
    DarrylBurke's Avatar
    DarrylBurke is online now Forum Police
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  3. #3
    fwilliams is offline Member
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    Default Correct

    Darryl is absolutely right...

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

    Swing - setWindowOpaque and AWTUtilities questions

    Many thanks

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