Hi I am developing a PyQt5 Application where the user can set a timer countdown. For updating the time label I use a QThread which emits a pyqtSignal every second in order to update the GUI/time label. This is my Code which uses QThread:
from PyQt5.QtCore import QThread, pyqtSignal, QObject import time
class Worker(QObject):
update = pyqtSignal()
stop = pyqtSignal()
class CountdownThread(QThread):
def __init__(self, time_left):
QThread.__init__(self)
self.time_signal = Worker()
self.time_left = time_left
self.is_running = True
def stop(self):
self.is_running = False
print(self.is_running)
def run(self):
while self.is_running:
self.time_left -= 1
time.sleep(1)
self.time_signal.update.emit()
if self.time_left == 0:
self.stop()
With a button click the user should be able to stop the countdown and reset the GUI:
...
def pressed_stop(self):
self.start_stop_btn.setText("Start")
self.start_stop_btn.clicked.connect(self.pressed_start)
self.worker.stop() # self.worker is the QThread
...
When I click on the button the button text certainly does change to "Start". But the time label keeps counting down. Printing the is_running variable prints out False when clicking the button and therefore executing the self.worker.stop() function but keeps printing out True in the while loop of run().
Initializing the CountdownThread is done here (after clicking start button):
...
def count_down(self):
self.worker = CountdownThread(self.time_left)
self.worker.time_signal.update.connect(self.update_time_label)
self.worker.time_signal.stop.connect(self.reset_timer)
self.worker.start()
...
Why doesn't this work? I am running this application on Mac OS Catalina 10.15.4.
