aboutsummaryrefslogtreecommitdiffstats
path: root/examples/widgets/state-machine/eventtrans/eventtrans.py
blob: f137d25b7561257c26dc07cb4a99c1bce198619b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95

#############################################################################
##
## Copyright (C) 2010 velociraptor Genjix <aphidia@hotmail.com>
## Copyright (C) 2021 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."
##
## $QT_END_LICENSE$
##
#############################################################################

import sys

from PySide6.QtCore import QEvent, QRect, Qt
from PySide6.QtWidgets import QApplication, QMainWindow, QPushButton
from PySide6.QtStateMachine import QEventTransition, QState, QStateMachine


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        button = QPushButton(self)
        button.setGeometry(QRect(100, 100, 100, 100))

        machine = QStateMachine(self)
        s1 = QState()
        s1.assignProperty(button, 'text', 'Outside')
        s2 = QState()
        s2.assignProperty(button, 'text', 'Inside')

        enter_transition = QEventTransition(button, QEvent.Enter)
        enter_transition.setTargetState(s2)
        s1.addTransition(enter_transition)

        leave_transition = QEventTransition(button, QEvent.Leave)
        leave_transition.setTargetState(s1)
        s2.addTransition(leave_transition)

        s3 = QState()
        s3.assignProperty(button, 'text', 'Pressing...')

        press_transition = QEventTransition(button, QEvent.MouseButtonPress)
        press_transition.setTargetState(s3)
        s2.addTransition(press_transition)

        release_transition = QEventTransition(button, QEvent.MouseButtonRelease)
        release_transition.setTargetState(s2)
        s3.addTransition(release_transition)

        machine.addState(s1)
        machine.addState(s2)
        machine.addState(s3)

        machine.setInitialState(s1)
        machine.start()

        self.setCentralWidget(button)
        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_win = MainWindow()
    sys.exit(app.exec())