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
96
97
98
99
100
101
102
103
| import os
import sys
from PySide6.QtCore import QThread, Slot, Signal, Qt
from PySide6.QtWidgets import (QApplication, QPushButton,
QLabel, QWidget, QVBoxLayout)
class WorkerThread(QThread):
progress = Signal(str)
def __init__(self, parent=None):
super().__init__(parent)
print('Init it', QThread.currentThread().objectName())
def run(self):
print('Running in: ', QThread.currentThread().objectName())
print('event loop level: ', QThread.currentThread().loopLevel())
path = os.path.abspath('.').split(os.path.sep)[0] + os.path.sep
for root, _, _ in os.walk(path):
if QThread.currentThread().isInterruptionRequested():
return
self.progress.emit(os.path.basename(root))
class Window(QWidget):
def __init__(self):
super().__init__()
QThread.currentThread().setObjectName('Main thread')
layout = QVBoxLayout()
self.setLayout(layout)
self.start_button = QPushButton('Start background thread')
self.start_button.clicked.connect(self.on_start_button_clicked)
self.cancel_button = QPushButton('Cancel')
self.cancel_button.clicked.connect(self.on_cancel_button_clicked)
self.cancel_button.setDisabled(True)
self.label = QLabel()
self.label.setAlignment(Qt.AlignmentFlag.AlignCenter)
layout.addWidget(self.start_button)
layout.addWidget(self.cancel_button)
layout.addWidget(self.label)
@Slot()
def on_start_button_clicked(self):
print('Main thread loop level', QThread.currentThread().loopLevel())
self.worker_thread = WorkerThread()
self.worker_thread.setObjectName('Worker thread')
self.worker_thread.started.connect(self.on_started)
self.worker_thread.progress.connect(self.on_progress)
self.start_button.setDisabled(True)
self.cancel_button.setEnabled(True)
self.worker_thread.start()
@Slot()
def on_cancel_button_clicked(self):
self.start_button.setEnabled(True)
self.cancel_button.setDisabled(True)
if hasattr(self, 'worker_thread'):
self.worker_thread.requestInterruption()
self.worker_thread.wait()
@Slot()
def on_started(self):
print('thread started')
@Slot()
def on_progress(self, msg):
self.label.setText(msg)
# Make sure the thread is destroyed
# when the main window is closed.
def closeEvent(self, event):
try:
self.worker_thread.requestInterruption()
self.worker_thread.wait()
except Exception as e:
print(e)
if __name__ == '__main__':
app = QApplication(sys.argv)
main_window = Window()
main_window.show()
sys.exit(app.exec())
|