[Development] QWebChannel communication with QWebEngineView

[Scott Bloom]

From: Arno Rehn <a.rehn at menlosystems.com>
Sent: Friday, September 26, 2025 02:02
To: development at qt-project.org
Cc: Scott Bloom <scott at towel42.com>
Subject: Re: [Development] QWebChannel communication with QWebEngineView


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
Ill take a look.  I really appreciate the pointer!




Scott
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