#!/usr/bin/python

#############################################################################
##
## 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.
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## $QT_BEGIN_LICENSE:GPL-EXCEPT$
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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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#############################################################################

import os
import sys
import unittest

sys.path.append(os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "util"))

from helper.timedqapplication import TimedQApplication
from PySide2.QtCore import QSignalTransition, QState, Qt, QStateMachine
from PySide2.QtWidgets import QCheckBox

class CheckedTransition(QSignalTransition):
    def __init__(self, check):
        QSignalTransition.__init__(self, check.stateChanged[int])
        self.eventTested = False

    def eventTest(self, event):
        self.eventTested = True
        if not QSignalTransition.eventTest(self, event):
            return False
        return event.arguments()[0] == Qt.Checked

class TestBug(TimedQApplication):
    def testCase(self):
        check = QCheckBox()
        check.setTristate(True)

        s1 = QState()
        s2 = QState()

        t1 = CheckedTransition(check)
        t1.setTargetState(s2)
        s1.addTransition(t1)

        machine = QStateMachine()
        machine.addState(s1)
        machine.addState(s2)
        machine.setInitialState(s1)
        machine.start()

        check.stateChanged[int].emit(1)
        check.show()
        self.app.exec_()
        self.assertTrue(t1.eventTested)

if __name__ == '__main__':
    unittest.main()