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Questions tagged [qtwebchannel]

Qt WebChannel enables peer-to-peer communication between a server (QML/C++ application) and a client (HTML/JavaScript or QML application).

26 questions
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How to use Qt WebEngine and QWebChannel?

I'm using the new WebEngine to play around and learn. I've been trying to find some similar methods found using Qt WebKit: addToJavaScriptWindowObject() I found that using Qt WebEngine, I have to use the QWebChannel to register functions to the…
user1185305
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PyQt QtWebChannel: calling Python function from JavaScript

I am trying, using Qt classes QWebEngineView, and QWebChannel to make a simple connection between HTML page and Python script. The goal is simply to execute foo() when the header

is clicked. import sys from PyQt5.QtCore import pyqtSlot from…

MrLoon
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How to detect button click inside Qwebengine in pyside2

I wrote an app in pyside2, which opening a webpage in QWebEngine. That web page has 2 buttons, I am not understanding how can I detect a button click in pyside2 app module, I need to perform other operation on that button click. Example below is…
Lalitkumar Tarsariya
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1 answer

Warnings when instantiating QWebChannel object in javascript

I have a widget which creates a google maps instance using QWebChannel. When instantiating the QWebChannel within javascript several warnings appear: Property 'accessibleName'' of object 'MapWindow' has no notify signal and is not constant, value…
Evan Brittain
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1 answer

folium popups with QtWebChannel

I am displaying a folium generated HTML(for leaflet.js) in a QtWebEngineView. In the popups I have a button w/ an on-click function that's supposed to call a method back in python. But I cant seem to get the channel to work. I'm not sure if I'm…
toknowjoyman
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How to receive data from python to js using QWebChannel?

I'm trying to get my PyQt application to communicate with the JS but am unable to get values from python. I have two slots on the python side to get and print data. In the example a int is passed from JS to python, python adds 5 to it and passes it…
Evan Brittain
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1 answer

PySide2 and supporting addToJavaScriptWindowObject

I am trying to port PySide application version #1 to PySide2 and struggle to find the solution for porting following code snippet: class AppManager(QtCore.QObject): ''' methods of AppObject will be available from javascript ''' def…
SpanishBoy
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QML WebEngineView + WebChannel not loading the script

Trying to use QML WebEngineView + WebChannel (Qt 5.15), but when running the videoTime script, I get js: Uncaught ReferenceError: QWebChannel is not defined Here is a reproducible example import QtQuick 2.15 import QtQuick.Window 2.15 import…
Pa_
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How can someone use QWebChannel over an existing TCP/IP connection (QTcpSocket)?

I am attempting to figure out how I can implement a QWebChannel that sends data via an existing QTCPSocket instead of via its default QWebSocket method. Here's something I attempted already, however I could not establish a connection: I have made…
mike510a
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Eliminate QWebChannel property notifier signal warnings

I'm using QWebEngineView with QWebChannel, similar to this: class AppView(QWebEngineView): def __init__(self): QWebEngineView.__init__(self) self.ch = QWebChannel(self.page()) self.page().setWebChannel(self.ch) Then I…
Dre Westcook
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1 answer

QWebChannel sends null QVariant POD structs to JavaScript

I am writing a C++ QWidget application that communicates with JavaScript running in a resource hosted web page. I need to find a way to send an array of the following POD structs to a JavaScript function hosted in the web page but unfortunately the…
johnco3
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Qt WebView and WebChannel over WebSockets in QML

I want to access QtObject from HTML-page running in WebView - invoke methods, read/write properties, etc. As far as I understood, I need to establish WebSockets connection between QML and HTML sides, and then use it as a transport for…
retif
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QWebEnginePage interactive with javascript not working?

I am not familiar with javascript and QWebEnginePage. When i set self.content.setText('text') content, the QWebEngineView content not changed? The python code class Document(QObject): textChanged = pyqtSignal(str) def __init__(self): …
jett chen
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Pyqt5 Move window from QtWebChannel

I am trying to make the mousePressEvent and mouseMoveEvent event work to move my app window from QtWebChannel. I am using self.setWindowFlags (QtCore.Qt.FramelessWindowHint) to remove window flag and use a custom one with html, css and js. Inside…
Oni
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qt.webChannelTransport from sub-frame

Is it possible to use the qt.webChannelTransport from a sub-frame? It seems like QWebEnginePage.setWebChannel only creates the qt.webChannelTransport object in the top frame. I've considered trying to inject scripts to handle cross document…
DRayX
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