SIMPLE PYQT BROWSER

# -*- coding: utf-8 -*-
from PyQt4.QtCore import *
from PyQt4.QtNetwork import *
# -*- coding: utf-8 -*-
from PyQt4.QtCore import *
from PyQt4.QtNetwork import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *

class BaseBrowser(QWidget):
    def __init__(self,  parent = None):
        super(BaseBrowser, self).__init__(parent)
        self.__progress = 0
        QNetworkProxyFactory.setUseSystemConfiguration(True)
        self.webView = QWebView()
        self.webView.load(QUrl("http://www.yandex.ru"))
        self.connect(self.webView, SIGNAL("loadFinished(bool)"), self.adjustLocation)
        self.connect(self.webView, SIGNAL("titleChanged(QString)"), self.adjustTitle)
        self.connect(self.webView, SIGNAL("loadProgress(int)"), self.setProgress)
        self.connect(self.webView, SIGNAL("loadFinished(bool)"), self.finishLoading)
        self.locationEdit = QLineEdit()
        self.locationEdit.setSizePolicy(QSizePolicy.Expanding, self.locationEdit.sizePolicy().verticalPolicy())
        self.connect(self.locationEdit, SIGNAL("returnPressed()"), self.changeLocation)
        self.goButton = QPushButton("Go")
        self.connect(self.goButton, SIGNAL("clicked()"),  self.changeLocation)
        self.layout = QGridLayout(self)
        self.layout.addWidget(self.locationEdit, 0, 0)
        self.layout.addWidget(self.goButton, 0, 1)
        self.layout.addWidget(self.webView, 1, 0,  1,  2)
        self.setLayout(self.layout)

    def adjustLocation(self):
        self.locationEdit.setText(self.webView.url().toString())

    def changeLocation(self):
        url = self.locationEdit.text()
        if url[0:7] != 'http://':
            url = 'http://' + url
        self.webView.load(QUrl(url))
        self.webView.setFocus()

    def adjustTitle(self):
        if self.__progress <= 0 or self.__progress >= 100:
            self.setWindowTitle(self.webView.title())
        else:
            self.setWindowTitle(QString("%1 (%2%)").arg(self.webView.title()).arg(self.__progress))

    def setProgress(self,  p):
        self.__progress = p
        self.adjustTitle()

    def finishLoading(self):
        self.__progress = 100
        self.adjustTitle()

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    prog = BaseBrowser()
    prog.show()
    sys.exit(app.exec_())