Moving from deprecated QtWebkit to QtWebengine ?

[kikislater]

Describe the solution you'd like
QtWebkit as been deprecated in 2020 for security and vulnerability reasons. QtWebEngine is the officially supported web rendering module for Qt
Moving to QtWebengine will allow:

• Strong security posture and long-term support.
• Continued compatibility with current and future Qt versions.

Describe alternatives you've considered
Moving to QtWebEngine if possible as recommended by Qt

Additional context
https://github.com/qtwebkit/qtwebkit/releases/tag/qtwebkit-5.212.0-alpha4

[ghtmtt]

thanks for reporting! It is already on my todo list

[ghtmtt]

not 100% sure but on this branch you can find an alpha version compatible with Qt6 and that uses QtWebengine instead of QtWebkit. I made some tests also for the plot interaction and it seems working. Are you able to test it?

[Smoltbob]

Hi! Thank you for working on this! I'd be happy to test, however I have no idea how I can package the plugin from source. Is there a guide I can follow ?
(I'm interested in this issue as the flatpak version of QGIS is not packaged with PyQt5.QtWebKit and thus the plugin cannot be installed.)

[ghtmtt]

@Smoltbob you can go the code main page and switch to the branch https://github.com/ghtmtt/DataPlotly/tree/webengine_qt6. The you can click on Code -> Download ZIP (github should automatically download the zip of the correct branch) and you have the entire repository on your computer.

The nested DataPlotly folder is the one that has to be added to the QGIS profile folder. You can zip it and in QGIS install the plugin from zip. Let me know if you need more information.

Looking for you feedback!

[kikislater]

@Smoltbob you can go the code main page and switch to the branch https://github.com/ghtmtt/DataPlotly/tree/webengine_qt6. The you can click on Code -> Download ZIP (github should automatically download the zip of the correct branch) and you have the entire repository on your computer.

The nested DataPlotly folder is the one that has to be added to the QGIS profile folder. You can zip it and in QGIS install the plugin from zip. Let me know if you need more information.

Looking for you feedback!

Nice, I didn't realized you have already did it !

[Smoltbob]

Thanks a lot @ghtmtt , I had no idea it was that easy. Unfortunately the zip installation failed with the following error

Couldn't load plugin 'DataPlotly' due to an error when calling its classFactory() method
ImportError: cannot import name 'QWebEngineSettings' from 'qgis.PyQt.QtWebEngineCore' (/app/share/qgis/python/qgis/PyQt/QtWebEngineCore.py)

I think it's an issue with my install of QGIS, it's installed on Fedora from flathub and thus may not have all the expected packages available.

Edit: I tried with an install from rpm, and get the same issue.

[ghtmtt]

@Smoltbob I'm on debian, using QGIS from flatpak too, and I've qt6-webengine-dev-tools on the system. Did you have it?

[Smoltbob]

I did not, but I tried by installing qt6-qtwebengine-devel and get the same error.

ImportError: cannot import name 'QWebEngineSettings' from 'qgis.PyQt.QtWebEngineCore' (/usr/lib64/python3.14/site-packages/qgis/PyQt/QtWebEngineCore.py)

(The python path is different because I tried in a toolbx container). I feel like QGIS is using the wrong qt version somehow ? I'll try to look closer at how to make sure my paths are correct.

[ghtmtt]

you can try to import the pyqt classes in the python console of QGIS to make some debug. Maybe it helps!

[Djedouas]

Hi,

I had the same import error on Ubuntu plucky 25.04, and fixed it by installing the following packages

python3-pyqt6.qtwebengine

python3-pyqt6.qtwebchannel