PyQt5 QCalendarWidget – Setting Change Event

QCalendarWidget is a commonly used GUI widget in PyQt5 to handle dates in a graphical format. In this article, we will discuss how to set the change event for the QCalendarWidget.

Setting the Change Event

To set the change event for QCalendarWidget, we need to use the clicked signal. This signal is emitted whenever a new date is selected in the calendar.

from PyQt5.QtWidgets import QApplication, QCalendarWidget, QWidget


class App(QWidget):
    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        cal = QCalendarWidget(self)
        cal.setGeometry(10, 10, 250, 200)

        cal.clicked[QDate].connect(self.onDateSelected)
        # set the clicked signal here

        self.setGeometry(300, 300, 300, 250)
        self.setWindowTitle('QCalendarWidget')
        self.show()

    def onDateSelected(self, date):
        print(date.toString())


if __name__ == '__main__':
    app = QApplication([])
    ex = App()
    app.exec_()

In the initUI function, we first create a QCalendarWidget object and set its size and position on the window. Then, we use clicked[QDate] signal and connect it to the onDateSelected function.

Finally, we implement the onDateSelected function. This function takes a date object and prints it to the console.

Now, when you run the program, select a date on the QCalendarWidget and watch as the onDateSelected method is called, printing the selected date to the console.

Conclusion

In this article, we have discussed how to set the change event for QCalendarWidget in PyQt5. By using the clicked signal, we connected the signal to the onDateSelected function and printed the selected date to the console.