PyQt5 QCalendarWidget - Updating It

PyQt5 is a Python library that allows you to create cross-platform desktop applications. One of the widgets provided by PyQt5 is QCalendarWidget, which allows users to pick a date from a calendar.

In this tutorial, we will show how to update QCalendarWidget to make it more customizable and user-friendly.

Customizing QCalendarWidget

Changing the Selection Mode

QCalendarWidget provides three selection modes: SingleSelection, NoSelection, and ExtendedSelection. You can change the selection mode by calling setSelectionMode method.

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QCalendarWidget

calendar = QCalendarWidget()
calendar.setSelectionMode(QCalendarWidget.ExtendedSelection)

Changing the Default Date

You can change the default date displayed by QCalendarWidget by calling setSelectedDate method.

from PyQt5.QtCore import QDate
from PyQt5.QtWidgets import QCalendarWidget

calendar = QCalendarWidget()
calendar.setSelectedDate(QDate.currentDate())

Changing the Color

You can change the color of the calendar by modifying the stylesheet.

from PyQt5.QtWidgets import QApplication, QCalendarWidget
import sys

app = QApplication(sys.argv)

calendar = QCalendarWidget()

# set the stylesheet
calendar.setStyleSheet("QCalendarWidget {background-color: yellow}")

calendar.show()

sys.exit(app.exec_())

Adding Event Handling

You can add event handling to QCalendarWidget to capture user input.

Getting the Selected Date

To get the selected date, you can connect the selectionChanged signal to a custom function that retrieves the selected date using selectedDate.

from PyQt5.QtWidgets import QApplication, QCalendarWidget
from PyQt5.QtCore import QDate
import sys

app = QApplication(sys.argv)

calendar = QCalendarWidget()
calendar.setSelectedDate(QDate.currentDate())

# define a custom function to retrieve the date
def get_date():
    date = calendar.selectedDate()
    print(date.toString())

# connect the signal to the custom function
calendar.selectionChanged.connect(get_date)

calendar.show()

sys.exit(app.exec_())

Handling Mouse Clicks

You can also handle mouse clicks on the calendar by connecting the clicked signal to a custom function.

from PyQt5.QtWidgets import QApplication, QCalendarWidget
from PyQt5.QtCore import QDate
import sys

app = QApplication(sys.argv)

calendar = QCalendarWidget()
calendar.setSelectedDate(QDate.currentDate())

# define a custom function to handle the mouse click
def handle_click(date):
    print(date.toString())

# connect the signal to the custom function
calendar.clicked.connect(handle_click)

calendar.show()

sys.exit(app.exec_())

Conclusion

QCalendarWidget is a useful widget provided by PyQt5 for selecting dates. By customizing it and adding event handling, you can make it more user-friendly and useful in a variety of applications.