<AWT Dev> Modal dialogs for fullscreen window

Artem Ananiev artem.ananiev at oracle.com
Tue Apr 16 05:14:08 PDT 2013

Hi, Vladimir,

I took a short look at your test at github. The test implements its own 
mechanism to enter fullscreen by adding _NET_WM_STATE_FULLSCREEN to the 
list of atoms in _NET_WM_STATE. There may be a conflict between XToolkit 
and the test, for example, caused by using different Display objects.

In XToolkit, _NET_WM_STATE_FULLSCREEN is only used in exclusive 
fullscreen mode, see the code in X11GraphicsDevice. I can't say for sure 
if OpenGL is used in this case. As for owned windows, nothing special is 
done about them. If a window has an owner, WM_TRANSIENT_FOR is set for 
it, which should be respected by WM. As you say that WM_TRANSIENT_FOR 
works fine together with _NET_WM_STATE_FULLSCREEN in most of the modern 
WMs, it should work for Java windows as well.

Could you check all the window properties both for the fullscreen window 
and for the child windows, in your environment, please? Are there any 
chances some of the properties (_NET_WM_STATE, WM_TRANSIENT_FOR) are not 
set for some reason?



On 4/15/2013 8:56 PM, Vladimir Kravets wrote:
> Hi guys,
> I'm using in my application fullscreen mode. Since 1.6 java have a lot
> of issue with it I using X11 native binding for it.
> Use JNA 3.4. To going to fullscreen I send XSendEvent as _NET_WM_STATE
> You can look at test application on the github:
> https://github.com/vkravets/FullScreenTest. Main Class: Main or MinTest
> So about the issue... I have an issue with modal dialogs or windows
> which I try to show when my main window in fullscreen mode.
>  From 1.7 java is not working as expected. In 1.6 java modal
> dialogs/windows appeared above fullscreen window as it should be, but in
> 1.7 and 1.8 all modal dialogs/windows appeared under the fullscreen window.
> I'm using wm Metacity, the same I have noticed on Gnome Shell... It
> seems that it's related to all clones of Metacity...
> I'm try to see how it's perform by defult native frameworks and I tested
> GTK3 and SWT which is using GTK bindings. And everything is working as
> expected. SmartGit which written on Java and use SWT don't have such
> problem. VLC/GTK the same - in fullscreen mode I can call some dialogs
> which will be appeared above fullscreen window.
> It's very strange  for me that Java in own documentation have such lines:
> Quote from GraphicsDevice#setFullScreenWindow:
> "
> Windows cannot overlap the full-screen window. All other application
> windows will always appear beneath the full-screen window in the Z-order.
> "
> Since from 1.7 java is using the same message _NET_WM_STATE with
> _NET_WM_STATE_FULLSCREEN to going to fullscreeb and is not clear why we
> have such broken behavior with modal dialogs from 1.7 java and such
> lines in the documentation....
> I'm already posted a defect to Oracle but Ithink it will be marked as
> duplicate since I found such issue
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7192269 which marked
> as Not an Issue and for me is not clear why?
> Could you please suggest workaround? Or please fix this =)
> Best Regards,
> Vladimir

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