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#############################################################################
##
## Copyright (C) 2017 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
##   * Redistributions of source code must retain the above copyright
##     notice, this list of conditions and the following disclaimer.
##   * Redistributions in binary form must reproduce the above copyright
##     notice, this list of conditions and the following disclaimer in
##     the documentation and/or other materials provided with the
##     distribution.
##   * Neither the name of The Qt Company Ltd nor the names of its
##     contributors may be used to endorse or promote products derived
##     from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################

"""PySide2 WebEngineWidgets Example"""

import sys
from PySide2.QtCore import QUrl
from PySide2.QtGui import QIcon
from PySide2.QtWidgets import (QApplication, QDesktopWidget, QLineEdit,
    QMainWindow, QPushButton, QToolBar)
from PySide2.QtWebEngineWidgets import QWebEnginePage, QWebEngineView

class MainWindow(QMainWindow):

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

        self.setWindowTitle('PySide2 WebEngineWidgets Example')

        self.toolBar = QToolBar()
        self.addToolBar(self.toolBar)
        self.backButton = QPushButton()
        self.backButton.setIcon(QIcon(':/qt-project.org/styles/commonstyle/images/left-32.png'))
        self.backButton.clicked.connect(self.back)
        self.toolBar.addWidget(self.backButton)
        self.forwardButton = QPushButton()
        self.forwardButton.setIcon(QIcon(':/qt-project.org/styles/commonstyle/images/right-32.png'))
        self.forwardButton.clicked.connect(self.forward)
        self.toolBar.addWidget(self.forwardButton)

        self.addressLineEdit = QLineEdit()
        self.addressLineEdit.returnPressed.connect(self.load)
        self.toolBar.addWidget(self.addressLineEdit)

        self.webEngineView = QWebEngineView()
        self.setCentralWidget(self.webEngineView)
        initialUrl = 'http://qt.io'
        self.addressLineEdit.setText(initialUrl)
        self.webEngineView.load(QUrl(initialUrl))
        self.webEngineView.page().titleChanged.connect(self.setWindowTitle)
        self.webEngineView.page().urlChanged.connect(self.urlChanged)

    def load(self):
        url = QUrl.fromUserInput(self.addressLineEdit.text())
        if url.isValid():
            self.webEngineView.load(url)

    def back(self):
        self.webEngineView.page().triggerAction(QWebEnginePage.Back)

    def forward(self):
        self.webEngineView.page().triggerAction(QWebEnginePage.Forward)

    def urlChanged(self, url):
        self.addressLineEdit.setText(url.toString())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainWin = MainWindow()
    availableGeometry = app.desktop().availableGeometry(mainWin)
    mainWin.resize(availableGeometry.width() * 2 / 3, availableGeometry.height() * 2 / 3)
    mainWin.show()
    sys.exit(app.exec_())