Message QWindowsNativeInterface::nativeResourceForWindow: 'handle' requested for null window or window without handle.

irfan.omair

fix is already in the repo so feel free to use latest or find the patch from there, commit is ac864956f8ba6f6cb527725a4347babab2a1e498

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[quote author="irfan.omair" date="1360970748"]fix is already in the repo so feel free to use latest or find the patch from there, commit is ac864956f8ba6f6cb527725a4347babab2a1e498 [/quote]

Received, thank you very much. Although I do not know how to fix the patch, had to wait for 5.02.
I will continue to learn.
Thanks again.

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[quote author="irfan.omair" date="1360970748"]fix is already in the repo so feel free to use latest or find the patch from there, commit is ac864956f8ba6f6cb527725a4347babab2a1e498 [/quote]

I got the same problem, thank you omair for providing a fix.

pklemm

Also on QT5.0.2 - Qt Commercial MinGW on Win7 64

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Also on Qt5.0.2 commercial, compiled with VS 2012.2 v110_xp 32 bit:

Warning:painting\qbackingstore.cpp (101:void __thiscall QBackingStore::flush(const class QRegion &,class QWindow *,const class QPoint &)) - QBackingStore::flush() called with non-exposed window, behavior is undefined

pklemm

Solved my reporting of "QWindowsNativeInterface::nativeResourceForWindow: ‘handle’ requested for null window or window without handle."

This was was due to one of my DLLs being built by an earlier version of Qt.

Once I rebuilt all of the code used in my project the error messages stopped.

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thanks, my warnings are slightly different - it complains about non exposed windows...

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Hi
I want to know step by step how I can fix this problem.
Thanks.

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What kind of warning do you have in detail?

"QBackingStore::flush() called with non-exposed window, behavior is undefined"

or

"QWindowsNativeInterface::nativeResourceForWindow: ‘handle’ requested for null window or window without handle."

the latter one was fixed in 5.0.2 as far as I know, the first one still exists. In my app, the first warnign raises as soon as I tabify a dockwidget which is currently hidden.

I have reported this issue to comemrcial support but did not get any response yet :/

regards,
Torben

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the second one
“QWindowsNativeInterface::nativeResourceForWindow: ‘handle’ requested for null window or window without handle”

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Have you upgraded to 5.0.2?

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I got this error on 5.0.1 but I have the 5.0.2 setup

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well, then test it if the warning still occurs on in the current stable release (5.0.2) -ideally before asking for support ;)

Good luck!

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Ok! I didn't know that the 5.0.1 is unstable. Thanks!

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hi,

5.0.1 is not unstable, but it is not the current stable release.

If you have a bug, it's always worth to verify that the used Qt version is the current stable release. If not, maybe the error is already fixed in the current stable release ;)

Cyttorak

I get a lot of those messages with that call:

QFileDialog::getOpenFileNames()

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Cyttorak: sorry, I lost my crystal ball yesterday, so I cannot help you...

...If you really want to get help, you should provide at least a minimal set of information:
which OS and with Qt version you use.

Torben

Cyttorak

Excuse me TorbenD for that poor example. I will create a minimum project in order to provide a better showing of this issue. Is there any jira about this problem so I can upload the example project?

Thank you

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Cyttorak,

no need for a project, just tell us what OS and what Qt version you use!!

I assume 5.0.1 since I got the warnings you describe in 5.0.1.

so:
a) what is your operating system you use?
b) what is your Qt version you use?

Cyttorak

Ok! :)

a) Windows 7 64 bits
b) Qt version 5.0.1, Mingw 4.7 32 bits

And as I said before I get those messages opening a QFileDialog window with getOpenFileNames() method.