<AWT Dev> KDE Task bar is always on top of fullscreen Java applications

Clemens Eisserer linuxhippy at gmail.com
Tue Jul 19 15:45:28 PDT 2011


Hi gouessej,

I used the binaries in jdk6/build/linux-i586/j2sdk-image/bin/, is it
> correct? Best regards.
>

Right, the binaries there are the ones you compiled.

Regards, Clemens


>
>
> > Message du 02/07/11 02:01
> > De : "David Holmes"
> > A : gouessej at orange.fr
> > Copie à : "Anthony Petrov" , awt-dev at openjdk.java.net
> > Objet : Re:  KDE Task bar is always on top of fullscreen Java
> applications
> >
> > gouessej at orange.fr said the following on 07/02/11 08:54:
> > > The problem is that I don't find a package containing this file, I
> looked at rpmfind.net and in the official repository. I already have
> libstdc++.so. I installed all packages about GCC and standard C++.
> >
> > Hmmm a google search doesn't reveal libstdc.so as being an real entity.
> > Now I think about it it should just be libc - no "std".
> >
> > Does the linker error specifically say libstdc.so? Can you show the link
> > command that is being used.
> >
> > David
> >
> > >
> > >> Message du 01/07/11 23:24
> > >> De : "David Holmes"
> > >> A : gouessej at orange.fr
> > >> Copie à : "Anthony Petrov" , awt-dev at openjdk.java.net
> > >> Objet : Re: KDE Task bar is always on top of fullscreen Java
> applications
> > >>
> > >> gouessej at orange.fr said the following on 07/02/11 06:11:
> > >>> libstdc++ devel package is installed but libstdc.so is not found. How
> can I solve this problem?
> > >> Install the missing dev package for your distro.
> > >>
> > >> David
> > >>
> > >>>> Message du 01/07/11 14:34
> > >>>> De : "David Holmes"
> > >>>> A : gouessej at orange.fr
> > >>>> Copie à : "Anthony Petrov" , awt-dev at openjdk.java.net
> > >>>> Objet : Re: KDE Task bar is always on top of fullscreen Java
> applications
> > >>>>
> > >>>> gouessej at orange.fr said the following on 07/01/11 08:27:
> > >>>>> I get this at the end of the compilation:
> > >>>>> "/usr/bin/ld: cannot open output file libjvm.so: Too many levels of
> symbolic links"
> > >>>>>
> > >>>>> I tried to recompile after cleaning all. What can I do to work
> around this problem?
> > >>>> Are you building hotspot? This is a quirk in the hotspot makefiles.
> If
> > >>>> the link fails to create the libjvm you get a symbolic link that
> refers
> > >>>> to itself. Subsequent build attempts don't try to rebuild libjvm as
> it
> > >>>> seems to exist but when ld tries to access it you get the "too many
> > >>>> levels of symbolic links" error.
> > >>>>
> > >>>> A full clean should fix it, but then you need to see what the
> original
> > >>>> error was caused by.
> > >>>>
> > >>>> David Holmes
> > >>>> -------------
> > >>>>
> > >>>>>> Message du 29/06/11 21:29
> > >>>>>> De : "Anthony Petrov"
> > >>>>>> A : gouessej at orange.fr
> > >>>>>> Copie à : awt-dev at openjdk.java.net
> > >>>>>> Objet : Re: KDE Task bar is always on top of fullscreen Java
> applications
> > >>>>>>
> > >>>>>> On 6/29/2011 5:59 PM, gouessej at orange.fr wrote:
> > >>>>>>> How can I detect whether a window is mapped? When XQueryTree
> returns zero, does it mean that the window is unmapped?
> > >>>>>> You could use XGetWindowAttributes() and examine the map_state
> field of
> > >>>>>> the XWindowAttributes() structure.
> > >>>>>>
> > >>>>>> Alternatively, you could pass an additional argument to the
> > >>>>>> X11GD_SetFullscreenMode() because at AWT level we always know
> whether a
> > >>>>>> window is mapped (see XBaseWindow.isMapped()).
> > >>>>>>
> > >>>>>>
> > >>>>>> PS. Your email client seems to replace the correct mailing list
> address
> > >>>>>> "awt-dev at openjdk.java.net" with something strange:
> > >>>>>> "awt-dev at rea.oracle.com" when pressing Reply All. Could you
> please
> > >>>>>> configure it properly?
> > >>>>>>
> > >>>>>> --
> > >>>>>> best regards,
> > >>>>>> Anthony
> > >>>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>>> I can create another patch, I will do this as soon as possible. I
> will ask to the KDE team that it is up to them not to promote only windows
> on top of the stack.
> > >>>>>>>
> > >>>>>>>> Message du 29/06/11 15:17
> > >>>>>>>> De : "Anthony Petrov"
> > >>>>>>>> A : gouessej at orange.fr
> > >>>>>>>> Copie à : awt-dev at rea.oracle.com
> > >>>>>>>> Objet : Re: KDE Task bar is always on top of fullscreen Java
> applications
> > >>>>>>>>
> > >>>>>>>> Hi Julien,
> > >>>>>>>>
> > >>>>>>>> So in your sample application you first set the window to the
> full
> > >>>>>>>> screen mode, and only then you setVisible(true) it. In this case
> the
> > >>>>>>>> EWMH spec states the following:
> > >>>>>>>>
> > >>>>>>>> ***********************************************************
> > >>>>>>>> The Window Manager SHOULD honor _NET_WM_STATE whenever a
> withdrawn
> > >>>>>>>> window requests to be mapped.
> > >>>>>>>> ***********************************************************
> > >>>>>>>>
> > >>>>>>>> In other words, the X11GD_SetFullscreenMode() should actually
> check
> > >>>>>>>> whether the window is currently mapped, and if so, do exactly
> what it
> > >>>>>>>> currently does. However, if the window is currently unmapped,
> then we
> > >>>>>>>> indeed have to use the XChangeProperty() call instead of the
> > >>>>>>>> XSendEvent() one.
> > >>>>>>>>
> > >>>>>>>> Please note that in either case we should not set the
> > >>>>>>>> _NET_WM_STATE_ABOVE state. The _NET_WM_STATE_FULLSCREEN alone
> should
> > >>>>>>>> work just fine. If it doesn't, then this is a problem with KDE.
> > >>>>>>>>
> > >>>>>>>> Could you please try to create such a patch and test it on KDE4?
> > >>>>>>>>
> > >>>>>>>> --
> > >>>>>>>> best regards,
> > >>>>>>>> Anthony
> > >>>>>>>>
> > >>>>>>>> On 6/29/2011 3:49 PM, gouessej at orange.fr wrote:
> > >>>>>>>>> One guy of the KDE team answered that we have misunderstood the
> EWMH specification, that some window managers derivate from it and that
> using XChangeProperty there has some sense. What should I do now?
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>> Message du 28/06/11 22:13
> > >>>>>>>>>> De : "Anthony Petrov"
> > >>>>>>>>>> A : "Phil Race"
> > >>>>>>>>> , gouessej at orange.fr
> > >>>>>>>>>> Copie à : awt-dev at openjdk.java.net
> > >>>>>>>>>> Objet : Re: KDE Task bar is always on top of fullscreen Java
> applications
> > >>>>>>>>>>
> > >>>>>>>>>> Phil: Ah, right! Haven't used to the new rules yet. Thanks for
> reminding
> > >>>>>>>>>> us about that.
> > >>>>>>>>>>
> > >>>>>>>>>> Julien: I have a few questions about your patch:
> > >>>>>>>>>>
> > >>>>>>>>>> 1. The xprop output that you've attached to the KDE bug report
> [1]
> > >>>>>>>>>> indicates that the full screen window is maximized (i.e. using
> the
> > >>>>>>>>>> emulated full screen mode rather than the exclusive one). In
> this case,
> > >>>>>>>>>> the behavior is correct. But I assume you did try to do the
> same with
> > >>>>>>>>>> the exclusive FS mode enabled, didn't you? Could you please
> provide an
> > >>>>>>>>>> xprop output in that case, too?
> > >>>>>>>>>>
> > >>>>>>>>>> 2. The EWMH specification [2] states that "A Client wishing to
> change
> > >>>>>>>>>> the state of a window MUST send a _NET_WM_STATE client message
> to the
> > >>>>>>>>>> root window". However, your proposed patch calls
> XChangeProperty() which
> > >>>>>>>>>> changes the property manually, and therefore violates the EWMH
> spec. I
> > >>>>>>>>>> think that a subsequent XSendEvent() to the root window should
> be enough
> > >>>>>>>>>> for our purposes.
> > >>>>>>>>>>
> > >>>>>>>>>> 3. The comments at the KDE bug report, as well as the EWMH
> spec (see the
> > >>>>>>>>>> "Stacking order" section) suggest that a window with the
> > >>>>>>>>>> _NET_WM_STATE_FULLSCREEN state should already be above any
> other windows
> > >>>>>>>>>> (including the _NET_WM_STATE_ABOVE windows). Also, the
> specification
> > >>>>>>>>>> states that the latter state should not be used by
> applications
> > >>>>>>>>>> directly. Note that the function X11GD_SetFullscreenMode()
> which you're
> > >>>>>>>>>> changing with your patch already sets the
> _NET_WM_STATE_FULLSCREEN state
> > >>>>>>>>>> to the full screen window, and, according to the EWMH
> specification,
> > >>>>>>>>>> that alone should work fine for full screen windows. So
> doesn't this
> > >>>>>>>>>> then seem to be a bug in KDE4 actually?
> > >>>>>>>>>>
> > >>>>>>>>>> [1] https://bugs.kde.org/show_bug.cgi?id=276159
> > >>>>>>>>>>
> > >>>>>>>>>> [2]
> http://standards.freedesktop.org/wm-spec/wm-spec-latest.html
> > >>>>>>>>>>
> > >>>>>>>>>> --
> > >>>>>>>>>> best regards,
> > >>>>>>>>>> Anthony
> > >>>>>>>>>>
> > >>>>>>>>>> On 6/28/2011 8:26 PM, Phil Race wrote:
> > >>>>>>>>>>> Anthony,
> > >>>>>>>>>>>
> > >>>>>>>>>>> That looks like a "small patch" so by the recent relaxation
> of the
> > >>>>>>>>>>> rules an OCA isn't needed.
> > >>>>>>>>>>>
> > >>>>>>>>>>> -phil.
> > >>>>>>>>>>>
> > >>>>>>>>>>> On 6/28/2011 5:02 AM, Anthony Petrov wrote:
> > >>>>>>>>>>>> Hi Julien,
> > >>>>>>>>>>>>
> > >>>>>>>>>>>> For your contribution to be acceptable, you have to sign an
> OCA.
> > >>>>>>>>>>>> Please refer to this page for details on how to become an
> OpenJDK
> > >>>>>>>>>>>> contributor:
> > >>>>>>>>>>>>
> > >>>>>>>>>>>> http://openjdk.java.net/contribute/
> > >>>>>>>>>>>>
> > >>>>>>>>>>>> --
> > >>>>>>>>>>>> best regards,
> > >>>>>>>>>>>> Anthony
> > >>>>>>>>>>>>
> > >>>>>>>>>>>> On 6/27/2011 4:03 PM, gouessej at orange.fr wrote:
> > >>>>>>>>>>>>> Hi!
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>> I think I have found a fix for this bug. On GNOME and on
> KDE the
> > >>>>>>>>>>>>> atoms remain unchanged according to xprops but the X client
> message
> > >>>>>>>>>>>>> is sent, that is why I call XChangeProperty. On the other
> hand, only
> > >>>>>>>>>>>>> a window on top of the stack can become fullscreen, that is
> why I use
> > >>>>>>>>>>>>> _NET_WM_STATE_ABOVE. I fear that building OpenJDK requires
> a lot of
> > >>>>>>>>>>>>> time. Could someone with a ready environment make a build
> for me with
> > >>>>>>>>>>>>> this fix? My "patch" is in the bug report here:
> > >>>>>>>>>>>>> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7057287
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>> Best regards
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>> Julien Gouesse
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>>> Message du 23/06/11 14:50
> > >>>>>>>>>>>>>> De : "Anthony Petrov" A : gouessej at orange.fr
> > >>>>>>>>>>>>>> Copie à : Objet : Re: KDE Task bar is always on top of
> fullscreen
> > >>>>>>>>>>>>>> Java applications
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> Hi,
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> On 06/22/2011 02:28 PM, gouessej at orange.fr wrote:
> > >>>>>>>>>>>>>>> Yes, that's it. I'm sad because I'm using JOGL AWT canvas
> called
> > >>>>>>>>>>>>>>> GLCanvas and this bug impacts my first person shooter. If
> I knew
> > >>>>>>>>>>>>>>> better the source code of AWT, I would try to write a
> patch. I assume
> > >>>>>>>>>>>>>>> there is a way of detecting the window manager to apply
> this fix only
> > >>>>>>>>>>>>>>> in this case, isn't it?
> > >>>>>>>>>>>>>> This window state is a part of EWMH specification, so
> there's no
> > >>>>>>>>>>>>>> need to set it for specific WMs only.
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>> Does AWT currently rely on xrandr or VidMode on Linux?
> Best regards.
> > >>>>>>>>>>>>>> I think this question belongs to the 2d-dev at openjdkmailing list.
> > >>>>>>>>>>>>>> I'm not a Java2D expert. Please ask 2D folks about that.
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> PS. Please remember to use Reply All rather than just
> Reply so that
> > >>>>>>>>>>>>>> your message hits the mailing list.
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> --
> > >>>>>>>>>>>>>> best regards,
> > >>>>>>>>>>>>>> Anthony
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>>> Message du 22/06/11 12:11
> > >>>>>>>>>>>>>>>> De : "Anthony Petrov" A : gouessej at orange.fr
> > >>>>>>>>>>>>>>>> Copie à : awt-dev at openjdk.java.net
> > >>>>>>>>>>>>>>>> Objet : Re: KDE Task bar is always on top of fullscreen
> Java
> > >>>>>>>>>>>>>>>> applications
> > >>>>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>>> Hello,
> > >>>>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>>> On 6/22/2011 1:14 PM, gouessej at orange.fr wrote:
> > >>>>>>>>>>>>>>>>> The exclusive fullscreen mode is broken in KDE for Java
> > >>>>>>>>>>>>>>>>> applications as I explained here:
> > >>>>>>>>>>>>>>>>> https://bugs.kde.org/show_bug.cgi?id=276159
> > >>>>>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>>>>
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7057287
> > >>>>>>>>>>>>>>>>> (not yet visible)
> > >>>>>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>>>> After some investigations, the problem comes from Java
> which does
> > >>>>>>>>>>>>>>>>> not
> > >>>>>>>>>>>>>>>>> tag the window as fullscreen. Do you know how to fix
> this bug?
> > >>>>>>>>>>>>>>>> To tag full screen windows with the
> _NET_WM_STATE_FULLSCREEN
> > >>>>>>>>>>>>>>>> state? That's easy. :)
> > >>>>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>>> Thanks for filing the bug report. AWT team will take
> care of this
> > >>>>>>>>>>>>>>>> issue.
> > >>>>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>>> --
> > >>>>>>>>>>>>>>>> best regards,
> > >>>>>>>>>>>>>>>> Anthony
> > >>>>>>>>>>>>>>>>
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.openjdk.java.net/pipermail/awt-dev/attachments/20110720/69d18a8a/attachment.html 


More information about the awt-dev mailing list