qtwebchannel

PyQt QtWebChannel: calling Python function from JavaScript

由 强颜欢笑 提交于 2021-02-04 04:49:55
问题 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 <h2> is clicked. import sys from PyQt5.QtCore import pyqtSlot from PyQt5.QtWidgets import QApplication from PyQt5.QtWebChannel import QWebChannel from PyQt5.QtWebEngineWidgets import QWebEngineView, QWebEnginePage html = ''' <!DOCTYPE html> <html> <head> <meta charset="utf-8"/> <script src="qrc:///qtwebchannel

How to receive data from python to js using QWebChannel?

由 你离开我真会死。 提交于 2020-03-21 05:37:26
问题 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 back, then JS calls the other slot to print the new value. var backend = null; var x = 15; new QWebChannel(qt.webChannelTransport, function (channel) { backend = channel.objects.backend; backend.getRef(x, function(pyval){ backend.printRef(pyval) })

How to detect button click inside Qwebengine in pyside2

由 我的未来我决定 提交于 2019-12-22 08:23:12
问题 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 my code from PySide2.QtWidgets import QApplication from PySide2.QtWebEngineWidgets import QWebEngineView, QWebEnginePage from PySide2.QtCore import QUrl class WebEnginePage(QWebEnginePage): def __init__(self, *args, **kwargs): QWebEnginePage.__init__

How to detect button click inside Qwebengine in pyside2

由 試著忘記壹切 提交于 2019-12-22 08:22:43
问题 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 my code from PySide2.QtWidgets import QApplication from PySide2.QtWebEngineWidgets import QWebEngineView, QWebEnginePage from PySide2.QtCore import QUrl class WebEnginePage(QWebEnginePage): def __init__(self, *args, **kwargs): QWebEnginePage.__init__

Eliminate QWebChannel property notifier signal warnings

由 风流意气都作罢 提交于 2019-12-19 11:59:14
问题 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 call: self.ch.registerObject('app',self) and everything runs correctly. However, I then get log-spam like this: ... Property 'title'' of object 'AppView' has no notify signal and is not constant, value updates in HTML will be broken! Property 'url'' of object 'AppView' has no

How to wait on asynchronous javascript function without async/await support？

由 帅比萌擦擦* 提交于 2019-12-13 03:25:24
问题 This is something related to porting from Qt Webkit to Qt Webengine . The following code works well in webkit. <script type="text/javascript"> var result = objectExposedFromC++.someFunction(); //sync; console.log("I want to use result here"); </script> But things changed in webengine. <script type="text/javascript"> var result = objectExposedFromC++.someFunction(); //async; console.log("I want to use result here, but result isn't avaiable"); </script> One way to make it work is shown as

Qt WebView and WebChannel over WebSockets in QML

由 匆匆过客 提交于 2019-12-08 07:14:55
问题 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 WebChannel. Don't confuse WebView with WebEngineView - I know how to do it with WebEngineView, but I need to do it with WebView. So, here's what I have. QML side QtObject { id: someObject WebChannel.id: "backend" property string someProperty: “property value" }

Qt WebView and WebChannel over WebSockets in QML

由 て烟熏妆下的殇ゞ 提交于 2019-12-06 15:57:06
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 WebChannel . Don't confuse WebView with WebEngineView - I know how to do it with WebEngineView, but I need to do it with WebView. So, here's what I have. QML side QtObject { id: someObject WebChannel.id: "backend" property string someProperty: “property value" } WebSocketServer { listen: true port: 55222 onClientConnected: { console.log(webSocket.status); /
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