我正在尝试将 PySide 应用程序版本 #1 移植到 PySide2 并努力寻找移植以下代码片段的解决方案:
class AppManager(QtCore.QObject):
'''
methods of AppObject will be available from javascript
'''
def __init__(self, webview):
QtCore.QObject.__init__(self)
class WebView(QWebEngineView):
def __init__(self, parent=None):
QWebEngineView.__init__(self, parent)
self.setPage(WebEnginePage(self))
def contextMenuEvent(self, event):
pass
class AppWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.view = WebView(self)
self.page = self.view.page()
self.app_manager = AppManager(self.view)
self.page.mainFrame().addToJavaScriptWindowObject('app_manager', self.app_manager)
# ERROR in above line !!!
我在文档中找不到我必须找到可能的修复方法
最佳答案
您必须使用 QWebChannel，为此您必须下载 qwebchannel.js(链接指向 qwebchannel.js for Qt 5.12 ，不同版本更改 github 分支)。
在下面的代码中，我展示了一个例子:
.
├── index.html
├── main.py
└── qwebchannel.js
main.py
import sys
from PySide2 import QtCore, QtGui, QtWidgets, QtWebEngineWidgets, QtWebChannel
class WebEnginePage(QtWebEngineWidgets.QWebEnginePage):
pass
class AppManager(QtCore.QObject):
textChanged = QtCore.Signal(str)
def __init__(self, webview):
QtCore.QObject.__init__(self)
self.m_text = ""
timer = QtCore.QTimer(self)
timer.timeout.connect(self.on_timeout)
timer.start(1000)
def on_timeout(self):
self.text = QtCore.QDateTime.currentDateTime().toString()
@QtCore.Property(str, notify=textChanged)
def text(self):
return self.m_text
@text.setter
def setText(self, text):
if self.m_text == text:
return
self.m_text = text
self.textChanged.emit(self.m_text)
class WebView(QtWebEngineWidgets.QWebEngineView):
def __init__(self, parent=None):
QtWebEngineWidgets.QWebEngineView.__init__(self, parent)
self.setPage(WebEnginePage(self))
def contextMenuEvent(self, event):
pass
class AppWindow(QtWidgets.QMainWindow):
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
self.view = WebView(self)
self.page = self.view.page()
self.app_manager = AppManager(self.view)
channel = QtWebChannel.QWebChannel(self)
self.page.setWebChannel(channel)
channel.registerObject("app_manager", self.app_manager)
self.view.load(QtCore.QUrl.fromLocalFile(QtCore.QDir.current().filePath("index.html")))
self.setCentralWidget(self.view)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = AppWindow()
w.show()
sys.exit(app.exec_())
index.html
<html>
<head>
<script type="text/javascript" src="./qwebchannel.js"></script>
</head>
<header><title>This is title</title></header>
<body>
<p id="output"></p>
<script type="text/javascript">
window.onload = function() {
new QWebChannel(qt.webChannelTransport, function (channel) {
window.app_manager = channel.objects.app_manager;
console.log(app_manager);
app_manager.textChanged.connect(function(message) {
document.getElementById("output").innerHTML = "Received message: " + message;
});
});
}
</script>
</body>
</html>
关于python - PySide2 并支持 addToJavaScriptWindowObject，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/51011244/