Merge remote-tracking branch 'origin/5.9' into devHEADdev

Change-Id: I7f2e832b6642d84028a2a2fb39c6ac896136b7c3

16 files changed, 279 insertions, 20 deletions

diff --git a/examples/charts/memoryusage.py b/examples/charts/memoryusage.py
index 5842e4c..c0e0a38 100644
--- a/examples/charts/memoryusage.py
+++ b/examples/charts/memoryusage.py
@@ -66,7 +66,7 @@ def getMemoryUsage():
                 command = line[0:23].strip()
                 if command.endswith('.exe'):
                     command = command[0:len(command) - 4]
-                memoryUsage = float(line[64:74].strip().replace(',', ''))
+                memoryUsage = float(line[64:74].strip().replace(',', '').replace('.', ''))
                 legend = ''
                 if memoryUsage > 10240:
                     legend = '{} {}M'.format(command, round(memoryUsage / 1024))
diff --git a/examples/datavisualization/bars3d.py b/examples/datavisualization/bars3d.py
new file mode 100644
index 0000000..c07314c
--- /dev/null
+++ b/examples/datavisualization/bars3d.py
@@ -0,0 +1,115 @@
+#!/usr/bin/python
+
+#############################################################################
+##
+## Copyright (C) 2017 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the PySide 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 QtDataVisualization example"""
+
+import os
+import sys
+from PySide2.QtCore import QRect, QSize, QProcess, Qt
+from PySide2.QtGui import QGuiApplication, QScreen, QWindow
+from PySide2.QtWidgets import QApplication, QSizePolicy, QMainWindow, QWidget
+from PySide2.QtDataVisualization import QtDataVisualization
+
+def dataToBarDataRow(data):
+    return list(QtDataVisualization.QBarDataItem(d) for d in data)
+
+def dataToBarDataArray(data):
+    return list(dataToBarDataRow(row) for row in data)
+
+class MainWindow(QMainWindow):
+
+    def __init__(self):
+        super(MainWindow, self).__init__()
+
+        self.setWindowTitle('Qt DataVisualization 3D Bars')
+
+        self.bars = QtDataVisualization.Q3DBars()
+
+        self.columnAxis = QtDataVisualization.QCategory3DAxis()
+        self.columnAxis.setTitle('Columns')
+        self.columnAxis.setTitleVisible(True)
+        self.columnAxis.setLabels(['Column1', 'Column2'])
+        self.columnAxis.setLabelAutoRotation(30);
+
+        self.rowAxis = QtDataVisualization.QCategory3DAxis()
+        self.rowAxis.setTitle('Rows')
+        self.rowAxis.setTitleVisible(True)
+        self.rowAxis.setLabels(['Row1', 'Row2'])
+        self.rowAxis.setLabelAutoRotation(30);
+
+        self.valueAxis = QtDataVisualization.QValue3DAxis()
+        self.valueAxis.setTitle('Values')
+        self.valueAxis.setTitleVisible(True)
+        self.valueAxis.setRange(0, 5);
+
+        self.bars.setRowAxis(self.rowAxis)
+        self.bars.setColumnAxis(self.columnAxis)
+        self.bars.setValueAxis(self.valueAxis)
+
+        self.series = QtDataVisualization.QBar3DSeries()
+        self.arrayData = [[1, 2], [3, 4]]
+        self.series.dataProxy().addRows(dataToBarDataArray(self.arrayData))
+
+        self.bars.setPrimarySeries(self.series)
+
+        self.container = QWidget.createWindowContainer(self.bars)
+
+        if not self.bars.hasContext():
+            print("Couldn't initialize the OpenGL context.")
+            sys.exit(-1)
+
+        camera = self.bars.scene().activeCamera()
+        camera.setYRotation(22.5)
+
+        geometry = QGuiApplication.primaryScreen().geometry()
+        size = geometry.height() * 3 / 4
+        self.container.setMinimumSize(size, size)
+
+        self.container.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding);
+        self.container.setFocusPolicy(Qt.StrongFocus);
+        self.setCentralWidget(self.container)
+
+if __name__ == '__main__':
+    app = QApplication(sys.argv)
+    mainWin = MainWindow()
+    mainWin.show()
+    sys.exit(app.exec_())
diff --git a/examples/declarative/extending/chapter1-basics/basics.py b/examples/declarative/extending/chapter1-basics/basics.py
index 64d7ad0..2ed02fd 100644
--- a/examples/declarative/extending/chapter1-basics/basics.py
+++ b/examples/declarative/extending/chapter1-basics/basics.py
@@ -88,7 +88,10 @@ if __name__ == '__main__':
 
     view = QQuickView()
     view.setResizeMode(QQuickView.SizeRootObjectToView)
-    view.setSource(QUrl.fromLocalFile('app.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'app.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
     res = app.exec_()
     # Deleting the view before it goes out of scope is required to make sure all child QML instances
diff --git a/examples/declarative/extending/chapter2-methods/methods.py b/examples/declarative/extending/chapter2-methods/methods.py
index 847d5e5..f9bd6d3 100644
--- a/examples/declarative/extending/chapter2-methods/methods.py
+++ b/examples/declarative/extending/chapter2-methods/methods.py
@@ -93,7 +93,10 @@ if __name__ == '__main__':
 
     view = QQuickView()
     view.setResizeMode(QQuickView.SizeRootObjectToView)
-    view.setSource(QUrl.fromLocalFile('app.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'app.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
     res = app.exec_()
     # Deleting the view before it goes out of scope is required to make sure all child QML instances
diff --git a/examples/declarative/extending/chapter3-bindings/bindings.py b/examples/declarative/extending/chapter3-bindings/bindings.py
index 47e02a6..e87d3f4 100644
--- a/examples/declarative/extending/chapter3-bindings/bindings.py
+++ b/examples/declarative/extending/chapter3-bindings/bindings.py
@@ -98,7 +98,10 @@ if __name__ == '__main__':
 
     view = QQuickView()
     view.setResizeMode(QQuickView.SizeRootObjectToView)
-    view.setSource(QUrl.fromLocalFile('app.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'app.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
     res = app.exec_()
     # Deleting the view before it goes out of scope is required to make sure all child QML instances
diff --git a/examples/declarative/extending/chapter4-customPropertyTypes/customPropertyTypes.py b/examples/declarative/extending/chapter4-customPropertyTypes/customPropertyTypes.py
index 4b936fa..fd94991 100644
--- a/examples/declarative/extending/chapter4-customPropertyTypes/customPropertyTypes.py
+++ b/examples/declarative/extending/chapter4-customPropertyTypes/customPropertyTypes.py
@@ -103,7 +103,10 @@ if __name__ == '__main__':
 
     view = QQuickView()
     view.setResizeMode(QQuickView.SizeRootObjectToView)
-    view.setSource(QUrl.fromLocalFile('app.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'app.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
     res = app.exec_()
     # Deleting the view before it goes out of scope is required to make sure all child QML instances
diff --git a/examples/declarative/extending/chapter5-listproperties/listproperties.py b/examples/declarative/extending/chapter5-listproperties/listproperties.py
index a6b270b..718691f 100644
--- a/examples/declarative/extending/chapter5-listproperties/listproperties.py
+++ b/examples/declarative/extending/chapter5-listproperties/listproperties.py
@@ -116,7 +116,10 @@ if __name__ == '__main__':
 
     view = QQuickView()
     view.setResizeMode(QQuickView.SizeRootObjectToView)
-    view.setSource(QUrl.fromLocalFile('app.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'app.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
     res = app.exec_()
     # Deleting the view before it goes out of scope is required to make sure all child QML instances
diff --git a/examples/declarative/scrolling.py b/examples/declarative/scrolling.py
index a614c70..ff704c4 100755
--- a/examples/declarative/scrolling.py
+++ b/examples/declarative/scrolling.py
@@ -42,6 +42,7 @@
 
 from __future__ import print_function
 
+import os
 import sys
 from PySide2.QtCore import QUrl
 from PySide2.QtGui import QGuiApplication
@@ -60,8 +61,10 @@ if __name__ == '__main__':
     ctxt = view.rootContext()
     ctxt.setContextProperty("myModel", dataList)
 
-    url = QUrl('view.qml')
-    view.setSource(url)
+    qmlFile = os.path.join(os.path.dirname(__file__), 'view.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
 
     app.exec_()
diff --git a/examples/declarative/signals/pytoqml1/main.py b/examples/declarative/signals/pytoqml1/main.py
index 0ca1ffe..92f94fe 100755
--- a/examples/declarative/signals/pytoqml1/main.py
+++ b/examples/declarative/signals/pytoqml1/main.py
@@ -42,6 +42,7 @@
 
 from __future__ import print_function
 
+import os
 import sys
 from PySide2.QtCore import QTimer, QUrl
 from PySide2.QtGui import QGuiApplication
@@ -55,7 +56,10 @@ if __name__ == '__main__':
     timer.start(2000)
 
     view = QQuickView()
-    view.setSource(QUrl('view.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'view.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     root = view.rootObject()
 
     timer.timeout.connect(root.updateRotater)
diff --git a/examples/declarative/signals/qmltopy1/main.py b/examples/declarative/signals/qmltopy1/main.py
index 1ce0507..683169e 100755
--- a/examples/declarative/signals/qmltopy1/main.py
+++ b/examples/declarative/signals/qmltopy1/main.py
@@ -42,6 +42,7 @@
 
 from __future__ import print_function
 
+import os
 import sys
 from PySide2.QtCore import QObject, QUrl, Slot
 from PySide2.QtGui import QGuiApplication
@@ -76,7 +77,10 @@ if __name__ == '__main__':
     context = view.rootContext()
     context.setContextProperty("con", con)
 
-    view.setSource(QUrl('view.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'view.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
     res = app.exec_()
     # Deleting the view before it goes out of scope is required to make sure all child QML instances
diff --git a/examples/declarative/signals/qmltopy2/main.py b/examples/declarative/signals/qmltopy2/main.py
index 2526ede..bb84f27 100755
--- a/examples/declarative/signals/qmltopy2/main.py
+++ b/examples/declarative/signals/qmltopy2/main.py
@@ -42,6 +42,7 @@
 
 from __future__ import print_function
 
+import os
 import sys
 from PySide2.QtCore import QObject, QUrl, Slot
 from PySide2.QtGui import QGuiApplication
@@ -68,7 +69,10 @@ if __name__ == '__main__':
     context = view.rootContext()
     context.setContextProperty("rotatevalue", rotatevalue)
 
-    view.setSource(QUrl('view.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'view.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
     res = app.exec_()
     # Deleting the view before it goes out of scope is required to make sure all child QML instances
diff --git a/examples/declarative/signals/qmltopy3/main.py b/examples/declarative/signals/qmltopy3/main.py
index f2ddd49..c78c77a 100755
--- a/examples/declarative/signals/qmltopy3/main.py
+++ b/examples/declarative/signals/qmltopy3/main.py
@@ -42,6 +42,7 @@
 
 from __future__ import print_function
 
+import os
 import sys
 from PySide2.QtCore import QObject, QUrl
 from PySide2.QtGui import QGuiApplication
@@ -54,7 +55,10 @@ def sayThis(s):
 if __name__ == '__main__':
     app = QGuiApplication(sys.argv)
     view = QQuickView()
-    view.setSource(QUrl('view.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'view.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
 
     root = view.rootObject()
     root.textRotationChanged.connect(sayThis)
diff --git a/examples/declarative/signals/qmltopy4/main.py b/examples/declarative/signals/qmltopy4/main.py
index fb6fc3e..9eb9d41 100755
--- a/examples/declarative/signals/qmltopy4/main.py
+++ b/examples/declarative/signals/qmltopy4/main.py
@@ -42,6 +42,7 @@
 
 from __future__ import print_function
 
+import os
 import sys
 from PySide2.QtCore import QObject, QUrl
 from PySide2.QtGui import QGuiApplication
@@ -54,7 +55,10 @@ def sayThis(s):
 if __name__ == '__main__':
     app = QGuiApplication(sys.argv)
     view = QQuickView()
-    view.setSource(QUrl('view.qml'))
+    qmlFile = os.path.join(os.path.dirname(__file__), 'view.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
 
     root = view.rootObject()
     button = root.findChild(QObject, "buttonMouseArea")
diff --git a/examples/declarative/usingmodel.py b/examples/declarative/usingmodel.py
index cbb334e..7d73990 100644
--- a/examples/declarative/usingmodel.py
+++ b/examples/declarative/usingmodel.py
@@ -42,8 +42,9 @@
 
 from __future__ import print_function
 
+import os
 import sys
-from PySide2.QtCore import QAbstractListModel, Qt
+from PySide2.QtCore import QAbstractListModel, Qt, QUrl
 from PySide2.QtGui import QGuiApplication
 import PySide2.QtQml
 from PySide2.QtQuick import QQuickView
@@ -89,7 +90,10 @@ if __name__ == '__main__':
     myModel.populate()
 
     view.rootContext().setContextProperty("myModel", myModel)
-    view.setSource('view.qml')
+    qmlFile = os.path.join(os.path.dirname(__file__), 'view.qml')
+    view.setSource(QUrl.fromLocalFile(qmlFile))
+    if view.status() == QQuickView.Error:
+        sys.exit(-1)
     view.show()
 
     app.exec_()
diff --git a/examples/multimedia/player.py b/examples/multimedia/player.py
index a519332..76445cd 100644
--- a/examples/multimedia/player.py
+++ b/examples/multimedia/player.py
@@ -73,7 +73,7 @@ class MainWindow(QMainWindow):
         playMenu = self.menuBar().addMenu("&Play")
         playIcon = self.style().standardIcon(QStyle.SP_MediaPlay)
         self.playAction = toolBar.addAction(playIcon, "Play")
-        self.playAction.triggered.connect(self.player, SLOT("play()"))
+        self.playAction.triggered.connect(self.player.play)
         playMenu.addAction(self.playAction)
 
         previousIcon = self.style().standardIcon(QStyle.SP_MediaSkipBackward)
@@ -83,17 +83,17 @@ class MainWindow(QMainWindow):
 
         pauseIcon = self.style().standardIcon(QStyle.SP_MediaPause)
         self.pauseAction = toolBar.addAction(pauseIcon, "Pause")
-        self.pauseAction.triggered.connect(self.player, SLOT("pause()"))
+        self.pauseAction.triggered.connect(self.player.pause)
         playMenu.addAction(self.pauseAction)
 
         nextIcon = self.style().standardIcon(QStyle.SP_MediaSkipForward)
         self.nextAction = toolBar.addAction(nextIcon, "Next")
-        self.nextAction.triggered.connect(self.playlist, SLOT("next()"))
+        self.nextAction.triggered.connect(self.playlist.next)
         playMenu.addAction(self.nextAction)
 
         stopIcon = self.style().standardIcon(QStyle.SP_MediaStop)
         self.stopAction = toolBar.addAction(stopIcon, "Stop")
-        self.stopAction.triggered.connect(self.player, SLOT("stop()"))
+        self.stopAction.triggered.connect(self.player.stop)
         playMenu.addAction(self.stopAction)
 
         self.volumeSlider = QSlider()
@@ -105,7 +105,7 @@ class MainWindow(QMainWindow):
         self.volumeSlider.setTickInterval(10)
         self.volumeSlider.setTickPosition(QSlider.TicksBelow)
         self.volumeSlider.setToolTip("Volume")
-        self.volumeSlider.valueChanged.connect(self.player, SLOT("setVolume(int)"))
+        self.volumeSlider.valueChanged.connect(self.player.setVolume)
         toolBar.addWidget(self.volumeSlider)
 
         aboutMenu = self.menuBar().addMenu("&About")
diff --git a/examples/webenginewidgets/simplebrowser.py b/examples/webenginewidgets/simplebrowser.py
new file mode 100644
index 0000000..b895acb
--- /dev/null
+++ b/examples/webenginewidgets/simplebrowser.py
@@ -0,0 +1,102 @@
+#!/usr/bin/env python
+
+#############################################################################
+##
+## Copyright (C) 2017 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the PySide 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_())