Question

This is in Python/PySide.

I am trying to create my own Parental WebBrowser by overloading the PySide.QtWebKit.QWebView widget. Then whenever someone clicks a link on the widget I check to see if we are going to an invalid website, if not we proceed, if yes then I redirect to a generic page.

So I have subclassed the PySide.QtWebKit.QWebView, but I am not receiving notification of when a link is clicked. I have overridden the linkClicked function but the function never runs when a link is clicked?

What am I doing wrong? Why cant my function run/react to the hyperlink click “event”? Do I need to override the webpage object & not this class to react to link clicks?

import PySide.QtWebKit
import sys
from PyQt4 import QtGui


class BrowserWindow( PySide.QtWebKit.QWebView ):
    # Class Variables:

    def __init__( self, _parent ):
        """ Constructor: """

        super(BrowserWindow, self).__init__()
        PySide.QtWebKit.QWebView(None)


    def linkClicked(self, arg__1):
        """ Post: """

        #print("LINK CLICKED")
        #text, ok = QtGui.QInputDialog.getText(self, 'Input Dialog', 
        #    'Enter your name:')

        self.load("http://yahoo.com")


def main():

    app = QtGui.QApplication(sys.argv)

    view = BrowserWindow(None) #PySide.QtWebKit.QWebView(None)
    view.load("http://google.com")
    view.show()

    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Answer 1

There are several problems with the code you posted. Firstly, you are importing both PySide and PyQt4, which is not a good idea. Secondly, QWebView.linkClicked is a signal, not a protected method, so you can’t override it. Thirdly, you are passing a string to QWebView.load, when you should be passing a QtCore.QUrl.

However, aside from those problems, you also need to set the linkDelegationPolicy on the web page in order to override its link handling.

Here’s an edited version of your code which should fix all the problems:

from PySide import QtCore, QtGui, QtWebKit

class BrowserWindow(QtWebKit.QWebView):
    def __init__(self, parent=None):
        super(BrowserWindow, self).__init__()
        self.linkClicked.connect(self.handleLinkClicked)

    def handleLinkClicked(self, url):
        print(url.toString())

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    view = BrowserWindow()
    view.load(QtCore.QUrl("http://google.com"))
    view.page().setLinkDelegationPolicy(
        QtWebKit.QWebPage.DelegateAllLinks)
    view.show()
    sys.exit(app.exec_())