#############################################################################
##
## Copyright (C) 2016 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the test suite of Qt for Python.
##
## $QT_BEGIN_LICENSE:GPL-EXCEPT$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
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## Software or, alternatively, in accordance with the terms contained in
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## information use the contact form at https://www.qt.io/contact-us.
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## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3 as published by the Free Software
## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
## included in the packaging of this file. Please review the following
## information to ensure the GNU General Public License requirements will
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#############################################################################

from PySide2 import QtCore, QtWidgets

class Window(QtWidgets.QMainWindow):
    def childEvent(self, event):
        super(Window, self).childEvent(event)

app = QtWidgets.QApplication([])
window = Window()

dock1 = QtWidgets.QDockWidget()
dock2 = QtWidgets.QDockWidget()
window.addDockWidget(QtCore.Qt.LeftDockWidgetArea, dock1)
window.addDockWidget(QtCore.Qt.LeftDockWidgetArea, dock2)
window.tabifyDockWidget(dock1, dock2)

window.show()
QtCore.QTimer.singleShot(0, window.close)
app.exec_()