[Development] QWebChannel communication with QWebEngineView

[Arno Rehn]

Hey Scott,

On 26.09.2025 01:31, Scott Bloom wrote:
>
> I have found the webchannel examples.  However, my need isn’t covered 
> and I cant for the life extend any of the examples.
>
> The goal is to have a dialog window with a QWebEngineView widget 
> instantiated, the application is all C++.
>
> The main page loaded will be in qrc, but loads other scripts that are 
> also in the qrc.
>
> Is there any example out there that shows a simple WebChannel based 
> communication between Widgets a WebEngineView?
>
Yes, the RecipeBrowser example does just this: 
https://doc.qt.io/qt-6/qtwebengine-webenginewidgets-recipebrowser-example.html

Note that QtWebChannel is agnostic to the concrete transport that's 
used. That's why none of the examples
in the QtWebChannel repo interact with a webview and the actual 
webview-using examples are in QtWebEngine.

QtWebEngine provides a specialized transport based on Chromium IPC. It's 
used automatically when you call QWebEnginePage::setChannel() 
[https://doc.qt.io/qt-6/qwebenginepage.html#setWebChannel].

Cheers,
Arno

-- 
Arno Rehn
Principal Software Engineer
Tel +49 89 189 166 0
Fax +49 89 189 166 111
a.rehn at menlosystems.com
www.menlosystems.com

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