AWTUtilities setWindowOpaque causing problems

Question

I have a modal JDialog that I set non-opaque with a call to the com.sun.awt.AWTUtilities method, setWindowOpaque(this, false).

I encounter problems when I set the modal JDialog to be non-opaque. For example, when I click on a button a non-opaque dialog, it pop up correctly but after a couple of opening and closing of the dialog, it does open. It is not visible; and, since it is modal, we can't click on the button contained in the parent panel. It's like it is frozen, but that's only because of the modal dialog.

If I remove the call to the method setWindowOpaque(this, false), it works without any problem.

Does anyone know what is going on?

I am using Java version "1.6.0_26" on Windows XP.

Thanks.

I suggest that you create and post an [SSCCE](http://sscce.org) — Hovercraft Full Of Eels, Sep 27 '11 at 23:50
*AWTUtilities.. java version "1.6.0_26"* There is no AWTUtilities in the Java 6 J2SE. Are you referring to a `sun` or `com.sun` class, Java 7, or something else? — Andrew Thompson, Sep 28 '11 at 01:44
See also [How to Create Translucent and Shaped Windows](http://java.sun.com/developer/technicalArticles/GUI/translucent_shaped_windows/). — trashgod, Sep 28 '11 at 03:07
@Andrew Thompson, yeah I'm obviously refering to com.sun.awt.AWTUtilities class. — ericxbenoit, Sep 28 '11 at 12:29
I resolved the problem by creating a small example. Found that the problem is not related to the setWindowOpaque method. Thanks for your help guys! — ericxbenoit, Sep 28 '11 at 15:04

score 1 · Answer 1 · answered Dec 02 '13 at 09:24

Ok, had a similar problem, sometimes the window was not responding, or transparency was broken... weird problems.

The solution, at least for me, was calling new TransparentWindow() inside invokeLater:

SwingUtilities.invokeLater(new Runnable() {
    @Override
    public void run() {
        TransparentWindow w = new TransparentWindow();
        w.setVisible(true);
    }
});

TransparentWindow is a class extending JWindow that uses com.sun.awt.AWTUtilities.setWindowOpaque(window,false); to create a transparent window with rounded transparent corners as explained here: Soft clipping and per-pixel translucency for Swing windows

AWTUtilities setWindowOpaque causing problems

1 Answers1