Timer
QTimer provides a timer that emits periodic signals.
# -*- coding: utf-8 -*-
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QTextEdit
from PyQt5.QtCore import QTimer
class TimerTextEdit(QTextEdit):
def __init__(self, parent=None):
super(TimerTextEdit, self).__init__(parent)
self.timer = QTimer(self)
self.timer.timeout.connect(self.append_message)
self.timer.start(5000) # 5000ms = 5s
def append_message(self):
self.append("5 seconds have passed!")
class TimerApp(QMainWindow):
def __init__(self):
super(TimerApp, self).__init__()
self.text_edit = TimerTextEdit(self)
self.setCentralWidget(self.text_edit)
self.init_ui()
def init_ui(self):
self.setWindowTitle('QTimer Example')
self.setGeometry(100, 100, 400, 300)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = TimerApp()
window.show()
sys.exit(app.exec_())
This script implements a simple timer application using PyQt5. It provides the user with a QTextEdit widget. Inside this widget, a QTimer is set up to display a message every 5 seconds.
TimerTextEdit: A subclass ofQTextEdit. It uses theQTimerto append a message every 5 seconds.TimerApp: The main window class. It usesTimerTextEditas its central widget.
