[PyQt] PyQt5 support for QtWebEngine (for QML WebEngineView)?

[Russell Warren]

>
> What do you actually want to use which is missing?


All I'm trying to do is get a WebEngineView to render in QML, per their
tiny example here (to start with):

http://doc.qt.io/qt-5/qml-qtwebengine-webengineview.html#initializing-web-engine

(Given that, according to the docs, you don't need to call
> QtWebEngine.initialize()).


Where does it say that? The docs I see [1] say that "*for the web engine
view to be rendered, the web engine must be initialized by using
QtWebEngine::initialize in the application main source file*".

When I convert the small C launcher in the example to python and load the
qml, I get:

QQmlApplicationEngine failed to load component
file:///home/russ/code/qml/examples/WEV.qml:3 module "QtWebEngine" is not
installed

Here is my python file (a direct translation from the cited docs, minus the
unavailable QtWebEngine.initialize()):

#!/usr/bin/env python
import sys
from PyQt5 import QtGui, QtQml
from OpenGL import GL  #Linux workaround.  See: http://goo.gl/s0SkFl

app = QtGui.QGuiApplication(sys.argv)
engine = QtQml.QQmlApplicationEngine()
engine.load("WEV.qml")
app.exec_()

And the QML file...

import QtQuick 2.0
import QtQuick.Window 2.0
import QtWebEngine 1.0

Window {
    width: 1024
    height: 750
    visible: true
    WebEngineView {
        anchors.fill: parent
        url: "http://www.qt.io"
    }
}

I have tried other python launchers (eg: with QQuickView) and I still run
into issues on that qml import of QtWebEngine.


On Fri, Sep 9, 2016 at 12:09 PM, Phil Thompson <phil at riverbankcomputing.com>
wrote:

> On 9 Sep 2016, at 4:19 pm, Russell Warren <russ at perspexis.com> wrote:
> >
> > I'm pretty confident that the answer to my question is that QtWebEngine
> (for qml support) is simply not in the PyQt wheel, even though
> QtWebEngineCore and QtWebEngineWidgets are included. Next step, I think, is
> to successfully build PyQt from scratch to see if it is there.
> >
> > However, while searching for docs to say which specific wrappers/modules
> are included in the wheels (do these exist? I couldn't find it), I noticed
> that "QtWebEngine" is not included in the list of PyQt5 components...
> >
> > http://pyqt.sourceforge.net/Docs/PyQt5/introduction.html#
> pyqt5-components
> >
> > Does this mean there are still no wrappers for it?  Is there a
> fundamental reason for this?  There is a very specific callout for
> QtWebEngineWidgets indicating that there can be compiler issues on Windows,
> but no mention of QtWebEngine is made.
> >
> > Also, assuming it isn't there, is there a list of modules like this that
> don't have PyQt wrappers available?
>
> What do you actually want to use which is missing? (Given that, according
> to the docs, you don't need to call QtWebEngine.initialize()).
>
> Phil




-- 
Russell Warren
Perspexis Technologies Inc.

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