PyQt5 QCalendarWidget – Setting Timer Event

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In this article we will see how we can implement the timer event for the QCalendarWidget. A timer event is sent to the calendar when the calendars startTimer interval is over. This event handler can be reimplemented in a subclass to receive calendar startTimer events which are passed in the event parameter.

Below is the Calendar class code

# QCalendarWidget Class
class Calendar(QCalendarWidget):
    
    # constructor
    def __init__(self, parent=None):
        super(Calendar, self).__init__(parent)

    # overriding the timer event
    # this will show the next month
    def timerEvent(self, event):

        # show the next month
        window.calendar.showNextMonth()

Implementation steps:
1. Create a Calendar class that inherits the QCalendarWidget
2. Inside the Calendar class override the timerEvent and inside the event show the next month of calendar
3. Create a main window class
4. Create a Calendar object inside the main window
5. Set various properties to the calendar

Below is the implementation

Python3

# importing libraries 
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui 
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys 
  
# QCalendarWidget Class 
class Calendar(QCalendarWidget): 
  
    # constructor 
    def __init__(self, parent = None): 
        super(Calendar, self).__init__(parent) 
  
    # overriding the timer event 
    # this will show the next month 
    def timerEvent(self, event): 
  
        # show the next month 
        window.calendar.showNextMonth() 
  
  
class Window(QMainWindow): 
  
    def __init__(self): 
        super().__init__() 
  
        # setting title 
        self.setWindowTitle("Python ") 
  
        # setting geometry 
        self.setGeometry(100, 100, 650, 400) 
  
        # calling method 
        self.UiComponents() 
  
        # showing all the widgets 
        self.show() 
  
    # method for components 
    def UiComponents(self): 
  
        # creating a QCalendarWidget object 
        # as Calendar class inherits QCalendarWidget 
        self.calendar = Calendar(self) 
  
        # setting geometry to the calendar 
        self.calendar.setGeometry(50, 10, 400, 250) 
  
        # setting cursor 
        self.calendar.setCursor(Qt.PointingHandCursor) 
  
        # starting the calendar timer 
        # passing 1000 milliseconds as parameter 
        timer_id = self.calendar.startTimer(1000) 
  
          
  
  
# create pyqt5 app 
App = QApplication(sys.argv) 
  
# create the instance of our Window 
window = Window() 
  
# start the app 
sys.exit(App.exec()) 