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

artem_pisarenko

Same problem. Qt 5.0.1 mingw (official build from downloads), win7 64bit.

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只要创建widget,就是一大堆QWindowsNativeInterface::nativeResourceForWindow: 'handle' requested for null window or window without handle.

自带的示例也是一样的.不知道是不是qt5.0.1的问题?
QT5.0.1 win7 32bit ming/vs2010 (official build)都是!

Just create widget, that is a lot of "QWindowsNativeInterface::nativeResourceForWindow: 'handle' requested for null window or window without handle."

QT Example has the same problem in QT5.0.1!
QT5.0.1 win7 32bit mingw4.7/vs2010 (official build)

irfan.omair

[quote author="xisuosunboy" date="1360592779"]只要创建widget,就是一大堆QWindowsNativeInterface::nativeResourceForWindow: 'handle' requested for null window or window without handle.

QT Example has the same problem in QT5.0.1!
QT5.0.1 win7 32bit mingw4.7/vs2010 (official build)[/quote]

Can you please point me which example and what steps required to see this , i just ran few widget based example and dont see this.

omichel

It seems you should compile in "debug" mode as in "release" mode, I do no get these messages.

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[quote author="irfan.omair" date="1360629199"]
[quote author="xisuosunboy" date="1360592779"]只要创建widget,就是一大堆QWindowsNativeInterface::nativeResourceForWindow: 'handle' requested for null window or window without handle.

QT Example has the same problem in QT5.0.1!
QT5.0.1 win7 32bit mingw4.7/vs2010 (official build)[/quote]

Can you please point me which example and what steps required to see this , i just ran few widget based example and dont see this.

[/quote]

"Application Example",When you click to "open" or "save",then there will a lot of "QWindowsNativeInterface::nativeResourceForWindow: 'handle' requested for null window or window without handle."

Whether in "debug" or "release",this problem occurs.

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When in windows2003 .QT5.0.1 32bit mingw4.7 (official build)

“Application Example”,When you click to “open” or “save”,then there one message like this "CoCreateInstance failed (在活动的激活上下文中没有找到任何查找密钥。)"

irfan.omair

Alright, so it seems it is coming up when you are actually trying to show native dialog. Let me try to reproduce it here

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[quote author="irfan.omair" date="1360695750"]Alright, so it seems it is coming up when you are actually trying to show native dialog. Let me try to reproduce it here[/quote]

Did you able to reproduce this problem?Or the problem is only my case.

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I'm sure it is not only your problem. As you can read in thes thread, many others are affected as well.

irfan.omair

Yes I was able to reproduce it and have fix if you guys are willing to apply the patch.

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”