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PyQt5 QCalendarWidget – Setting Custom Event

  • Last Updated : 17 Jun, 2020

In this article we will see how we can implement the custom event for the QCalendarWidget. This event handler can be reimplemented in a subclass to receive custom events. Custom events are user-defined events with a type value at least as large as the QEvent::User item of the QEvent::Type enum, and is typically a QEvent subclass.

Below is the Calendar class code

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

    # overriding the customEvent method
    def customEvent(self, event):

        print("Custom Event")

Implementation steps:
1. Create a Calendar class that inherits the QCalendarWidget
2. Inside the Calendar class override the customEvent and inside the event print the text
3. Create a main window class
4. Create a Calendar object inside the main window
5. Set various properties to the calendar
6. Connect a signal to the custom event

Below is the implementation

# 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 customEvent method
    def customEvent(self, event):
        print("Custom Event")
class Window(QMainWindow):
    def __init__(self):
        # setting title
        self.setWindowTitle("Python ")
        # setting geometry
        self.setGeometry(100, 100, 650, 400)
        # calling method
        # showing all the widgets
    # method for components
    def UiComponents(self):
        # creating a QCalendarWidget object
        # as Calendar class inherits QCalendarWidget
        self.calendar = Calendar(self)
        # setting geometry to the calender
        self.calendar.setGeometry(50, 10, 400, 250)
        # setting cursor
        # close the calendar
        self.calendar.selectionChanged.connect(lambda : self.calendar.customEvent("Change"))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app

Output :

Custom Event
Custom Event
Custom Event
Custom Event

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