[QGIS-Developer] Transition from QtWebKit to QtWebEngine in qgis2web (QGIS plugin)

[Info O.GIS]

   Good morning developers,

   I managed to get qtwebengine working in qgis2web.

   For some reason qtwebkit didn't need to set a window width while qtwebengine did, so with this code I solved it

   self.preview.setMinimumWidth(650)

   Request:
   What is the correct way to have users install the qtwebengine dependency?
   I wrote this code and it works fine but I only tested it on windows. Is this the correct way?

   try:

           if system == 'Windows':

               pip_exec = os.path.join(sysconfig.get_path("scripts"), "pip3")

               env = os.environ.copy()

               if full_proxy_url:

                   env['http_proxy'] = full_proxy_url

                   env['https_proxy'] = full_proxy_url

               subprocess.check_call([pip_exec, "install", "--upgrade", "PyQtWebEngine==5.15.6"], env=env)

           elif system == 'Linux':

               subprocess.check_call(["sudo", "apt-get", "install", "python3-pyqt5.qtwebengine"])

           elif system == 'Darwin':  # macOS

               subprocess.check_call(["brew", "install", "pyqt5"])

   Many thanks

   Andrea Ordonselli
   O.GIS - opengis.it
   Da info at opengis.it
   A jan at dalheimer.de
   Cc qgis-developer at lists.osgeo.org
   Data Tue, 9 Jul 2024 17:46:39 +0200
   Oggetto Re: [QGIS-Developer] Transition from QtWebKit to QtWebEngine in qgis2web (QGIS plugin)
   Thanks Jan Dalheimer
   Thanks Jean-Baptiste Peter
   From your answers I understood many things.
   I tried both to use QGIS 3.38.0 installed in win10 via .msi and the version via OSGeo4W setup; In the first case I added qtwebengine via "pip install qtwebengine", in the second case I installed the "python3-pyqtwebengine" package via OsGeo4w setup
   In both installations I get the same result: QtWebEngine it does not work well
   I also tried to create a new test plugin and I get the same result, I can't even view a web page. Is there an example of a basic plugin that I can see? Or can someone create it?
   The clue:
   If I use qt designer to insert a QtWebEngineView into the plugin graphics it works well, even when setting a static web page.
   But if I open QGIS that plugin won't work, why does this happen? I would therefore think that it is just a question of dependency .
   For now I noticed this:
   1) From QGIS version 3.38.0 I can use "from qgis.PyQt.QtWebEngineWidgets import *" instead of "from PyQt5.QtWebEngineWidgets import *"

   2) with qgis 3.38.0 .msi installation this dependency is missing:

   qt5-devel (5.15.13-1)

   Qt5 headers and libraries (Development)

   Required by: python3-pyqtwebengine

   3) with OSGeo4W setup these dependencies are required:

   python3-core (3.12.4-1)

   Python core interpreter and runtime

   Required by: python3-pyqtwebengine, python3-pyqt5, python3-pyqt5-sip

   python3-pyqt5 (5.15.10-1)

   Python bindings for the Qt cross platform application toolkit

   Required by: python3-pyqtwebengine

   python3-pyqt5-sip (12.13.0-1)

   The sip module support for PyQt5

   Required by: python3-pyqtwebengine, python3-pyqt5

   qt5-devel (5.15.13-1)

   Qt5 headers and libraries (Development)

   Required by: python3-pyqtwebengine

   qt5-libs (5.15.13-1)

   Qt5 runtime libraries

   Required by: python3-pyqtwebengine, python3-pyqt5, qt5-devel, qtwebkit-libs

   Thank you all
   Andrea Ordonselli
   OpenGIS.it
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