pyqt example webbrowser (snippet)

Python pyqt (gui) example 'webbrowser'

Modules used in program:

• import mainwindow_rc
• import sys

webbrowser

Python pyqt example: webbrowser

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##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
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## This file is part of the examples of PyQt.
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##   * Redistributions of source code must retain the above copyright
##     notice, this list of conditions and the following disclaimer.
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#############################################################################


import sys

from PyQt5.QtCore import pyqtSlot
from PyQt5.QtWidgets import (QApplication, QLabel, QLineEdit, QMainWindow,
        QMessageBox, QProgressBar)

import mainwindow_rc
from ui_mainwindow import Ui_MainWindow


class MainWindow(QMainWindow, Ui_MainWindow):
    # Maintain the list of browser windows so that they do not get garbage
    # collected.
    _window_list = []

    def __init__(self):
        super(MainWindow, self).__init__()

        MainWindow._window_list.append(self)

        self.setupUi(self)

        # Qt Designer (at least to v4.2.1) can't handle arbitrary widgets in a
        # QToolBar - even though uic can, and they are in the original .ui
        # file.  Therefore we manually add the problematic widgets.
        self.lblAddress = QLabel("Address", self.tbAddress)
        self.tbAddress.insertWidget(self.actionGo, self.lblAddress)
        self.addressEdit = QLineEdit(self.tbAddress)
        self.tbAddress.insertWidget(self.actionGo, self.addressEdit)

        self.addressEdit.returnPressed.connect(self.actionGo.trigger)
        self.actionBack.triggered.connect(self.WebBrowser.GoBack)
        self.actionForward.triggered.connect(self.WebBrowser.GoForward)
        self.actionStop.triggered.connect(self.WebBrowser.Stop)
        self.actionRefresh.triggered.connect(self.WebBrowser.Refresh)
        self.actionHome.triggered.connect(self.WebBrowser.GoHome)
        self.actionSearch.triggered.connect(self.WebBrowser.GoSearch)

        self.pb = QProgressBar(self.statusBar())
        self.pb.setTextVisible(False)
        self.pb.hide()
        self.statusBar().addPermanentWidget(self.pb)

        self.WebBrowser.dynamicCall('GoHome()')

    def closeEvent(self, e):
        MainWindow._window_list.remove(self)
        e.accept()

    def on_WebBrowser_TitleChange(self, title):
        self.setWindowTitle("Qt WebBrowser - " + title)

    def on_WebBrowser_ProgressChange(self, a, b):
        if a <= 0 or b <= 0:
            self.pb.hide()
            return

        self.pb.show()
        self.pb.setRange(0, b)
        self.pb.setValue(a)

    def on_WebBrowser_CommandStateChange(self, cmd, on):
        if cmd == 1:
            self.actionForward.setEnabled(on)
        elif cmd == 2:
            self.actionBack.setEnabled(on)

    def on_WebBrowser_BeforeNavigate(self):
        self.actionStop.setEnabled(True)

    def on_WebBrowser_NavigateComplete(self, _):
        self.actionStop.setEnabled(False)

    @pyqtSlot()
    def on_actionGo_triggered(self):
        self.WebBrowser.dynamicCall('Navigate(const QString&)',
                self.addressEdit.text())

    @pyqtSlot()
    def on_actionNewWindow_triggered(self):
        window = MainWindow()
        window.show()
        if self.addressEdit.text().isEmpty():
            return;

        window.addressEdit.setText(self.addressEdit.text())
        window.actionStop.setEnabled(True)
        window.on_actionGo_triggered()

    @pyqtSlot()
    def on_actionAbout_triggered(self):
        QMessageBox.about(self, "About WebBrowser",
                "This Example has been created using the ActiveQt integration into Qt Designer.\n"
                "It demonstrates the use of QAxWidget to embed the Internet Explorer ActiveX\n"
                "control into a Qt application.")

    @pyqtSlot()
    def on_actionAboutQt_triggered(self):
        QMessageBox.aboutQt(self, "About Qt")


if __name__ == "__main__":
    a = QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(a.exec_())

Useful links

• Learn PyQt: https://pythonbasics.org/pyqt-hello-world/
• Install PyQt: https://pythonbasics.org/install-pyqt/