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"""
Demonstrates how to use the Qt compatible scheduler to schedule a job that executes on 3 second
intervals.
"""
from datetime import datetime
import signal
import sys
from apscheduler.schedulers.qt import QtScheduler
try:
from PyQt5.QtWidgets import QApplication, QLabel
except ImportError:
try:
from PyQt4.QtGui import QApplication, QLabel
except ImportError:
from PySide.QtGui import QApplication, QLabel
def tick():
label.setText('Tick! The time is: %s' % datetime.now())
if __name__ == '__main__':
app = QApplication(sys.argv)
# This enables processing of Ctrl+C keypresses
signal.signal(signal.SIGINT, lambda *args: QApplication.quit())
label = QLabel('The timer text will appear here in a moment!')
label.setWindowTitle('QtScheduler example')
label.setFixedSize(280, 50)
label.show()
scheduler = QtScheduler()
scheduler.add_job(tick, 'interval', seconds=3)
scheduler.start()
# Execution will block here until the user closes the windows or Ctrl+C is pressed.
app.exec_()
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