# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations

"""PySide6 WebEngineWidgets Example"""

import sys
from PySide6.QtCore import QUrl, Slot
from PySide6.QtGui import QIcon
from PySide6.QtWidgets import (QApplication, QLineEdit,
                               QMainWindow, QPushButton, QToolBar)
from PySide6.QtWebEngineCore import QWebEnginePage
from PySide6.QtWebEngineWidgets import QWebEngineView


class MainWindow(QMainWindow):

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

        self.setWindowTitle('PySide6 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)

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

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

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

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


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