Webengine example fail with "Unknown module(s) in QT: webengine"

Konstantin Tokarev · M mrjj 14 Feb 2017, 19:02

@mrjj As for these binary packages, credits go to CI infrastructure of The Qt Company, and personally to Simon Hausmann who helped a lot with integration of new QtWebKit's build system into Coin.

Also credits go to Vitaly Slobodin and other contributors of revived QtWebKit, who contributed lots of patches enhancing Windows and macOS support. Without them, it could happen that only Linux would be supported.

PSI_lbc · 14 Feb 2017, 21:54

@PSI_lbc

Qt 5.7.1 Reference Documentation
Contents
Functions
Detailed Description
QtWebView Namespace
The QtWebView namespace provides functions that makes it easier to set-up and use the WebView. More...
Header:
#include <QtWebView>
qmake:
QT += webview

Docs say it's there but it isn't. This is after a fresh install of 5.8,5.7 MinGW53_32 and 5.6 MinGW49_32

PSI_lbc · wrote on 14 Feb 2017, 20:06

@Konstantin-Tokarev

Do you know if the 5.8/Webkit binaries support a mix of HTML and JavaScript on the same page?

A real ancient version of WebKit I was using in Qt4.7.2 did not...which is what has prompted my attempted upgrade to Qt5x/WebEngine.

SGaist · wrote on 14 Feb 2017, 20:27

Like written in the documentation I linked, QtWebEngine is not available with MinGW for the reason I have already given.

As for Visual Studio, yes, it's up to you to install it. It has always been the case. Microsoft doesn't allow any third party to bundle its development suits.

Konstantin Tokarev · wrote on 14 Feb 2017, 21:54

@PSI_lbc said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

Docs say it's there but it isn't. This is after a fresh install of 5.8,5.7 MinGW53_32 and 5.6 MinGW49_32

You need to install Qt 5.8.0 and extract QtWebKit binaries that you can download from link that I've posted above.

@PSI_lbc said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

Do you know if the 5.8/Webkit binaries support a mix of HTML and JavaScript on the same page?

Of course, yes!

xeoshow · 20 Nov 2017, 16:42

Is there any stable binary release for qt 5.9.2 now?
Thanks a lot!

Best regards, Jason

mrjj · wrote on 20 Nov 2017, 16:42

@xeoshow
Hi
I think its still alpha
https://github.com/annulen/webkit/releases

xeoshow · 21 Nov 2017, 11:40

@mrjj said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

@xeoshow
Hi
I think its still alpha
https://github.com/annulen/webkit/releases

I am still using the qt 5.5.1 mingw version, and using the default webview in that QT version. One BIG problem I met is memory leak seems still in qt 5.5.1 mingw version ...

Is the memory leak problem resolved in the qtwebkit-tp5-qt58-mingw530-x86.zip or qtwebkit-5.212.0_alpha2-qt59-mingw530-x86.zip from https://github.com/annulen/webkit/releases ?

xeoshow · wrote on 21 Nov 2017, 06:06

I just tried qt-opensource-windows-x86-mingw530-5.8.0.exe and qtwebkit-tp5-qt58-mingw530-x86.zip, For one of my project works well with qt 5.5.1 mingw, now got below error when compiling, anything I should modify? Or anything missing?

Thanks a lot!

Best regards, Jason

D:/Qt/Qt5.8.0/Tools/mingw530_32/bin/../lib/gcc/i686-w64-mingw32/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lQt5WebKitWidgetsd
D:/Qt/Qt5.8.0/Tools/mingw530_32/bin/../lib/gcc/i686-w64-mingw32/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lQt5WebKitd
collect2.exe: error: ld returned 1 exit status
Makefile.Debug:77: recipe for target 'debug/xc-browser.exe' failed
mingw32-make[1]: Leaving directory 'D:/gitrepository/xc/build-xc-browser-desktop-Desktop_Qt_5_8_0_MinGW_32bit-Debug'
mingw32-make[1]: *** [debug/xc-browser.exe] Error 1
Makefile:34: recipe for target 'debug' failed
mingw32-make: *** [debug] Error 2
13:35:42: Process"D:\Qt\Qt5.8.0\Tools\mingw530_32\bin\mingw32-make.exe"exit，exit code 2 。
Error while building/deploying project xc-browser-desktop (kit: Desktop Qt 5.8.0 MinGW 32bit)
When executing step "Make"
13:35:42: Elapsed time: 00:34.

xeoshow · wrote on 21 Nov 2017, 06:12

What I am talking about the memory leak, is something as below:

https://forum.qt.io/topic/10832/memory-size-increases-per-page-load/13

Konstantin Tokarev · 21 Nov 2017, 12:37

@xeoshow said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

Is the memory leak problem resolved in the qtwebkit-tp5-qt58-mingw530-x86.zip or qtwebkit-5.212.0_alpha2-qt59-mingw530-x86.zip

Please try it out, IIRC I couldn't reproduce that issue.

Also, don't use QWebSettings::setObjectCacheCapacities(0,0,0), this indeed was causing leaks in the old versions, and WebKit isn't really tuned or even tested to operate with no cache at all.

xeoshow · wrote on 21 Nov 2017, 12:37

@Konstantin-Tokarev said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

@PSI_lbc said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

Docs say it's there but it isn't. This is after a fresh install of 5.8,5.7 MinGW53_32 and 5.6 MinGW49_32

You need to install Qt 5.8.0 and extract QtWebKit binaries that you can download from link that I've posted above.

@PSI_lbc said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

Do you know if the 5.8/Webkit binaries support a mix of HTML and JavaScript on the same page?

Of course, yes!

@Konstantin-Tokarev said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

@xeoshow said in Windows 7 Webengine example fail with "Unknown module(s) in QT: webengine":

Is the memory leak problem resolved in the qtwebkit-tp5-qt58-mingw530-x86.zip or qtwebkit-5.212.0_alpha2-qt59-mingw530-x86.zip

Please try it out, IIRC I couldn't reproduce that issue.

Also, don't use QWebSettings::setObjectCacheCapacities(0,0,0), this indeed was causing leaks in the old versions, and WebKit isn't really tuned or even tested to operate with no cache at all.

Thanks for kind help, OK, I will try it out and report back.

BTW, is there any estimate target date for the beta or stable version? Thanks again.

Best regards, Jason

xeoshow · wrote on 23 Nov 2017, 02:33

Hello @Konstantin-Tokarev ,

I tried with 5.8.0 and 5.9.2 and your corresponding release of QtWebKit, seems still the same symptom, the memory will keep increasing if I refresh the page repeatedly.

BTW, the html pages I used are generated via vuejs, is that OK?

Thanks a lot.

Best regards, Jason

omagaldadze · wrote on 3 Mar 2019, 14:58

It now says Qt Webengine component is only supported for MSVC 2017, took me a while to figure out.

osirisgothra · wrote on 6 Dec 2024, 22:54

still think the components that are used in examples should be included by default or at least if nothing else warned that you wont be able to do some examples unless you have them (in the right places mind you, not tucked away in some weird documentation). It would also be nice if there is gonna be typing completion in qmake, cmake, etc., that it actually be contextual to the syntax of those items and not just spit out seemingly random tags most of which don't have anything to do with said files... even better, maybe include at least the headers that way you know for sure you are missing the library instead of ghostin' the whole kit'n'kaboodle.