PyQt5 QCalendarWidget – 设置按键释放事件

在本文中，我们将了解如何为 QCalendarWidget 实现按键释放事件。为了设置按键释放事件，我们必须重写 keyReleaseEvent 方法，通过重写按键释放事件，我们可以在按下按键时向日历添加功能。与按键事件不同，按键释放事件发生在按下的按键被释放时，我们可以说第一次按键事件发生，然后释放事件发生

Implementation steps:
1. Create a main window
2. Create a QCalendarWidget
3. Set various properties to the calendar
4. Override the keyReleaseEvent
5. Inside the override method check if the escape key pressed then hide the calendar

下面是实现

Python3

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys
  
  
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
        self.calendar = QCalendarWidget(self)
  
        # setting geometry to the calendar
        self.calendar.setGeometry(50, 10, 400, 250)
  
        # setting cursor
        self.calendar.setCursor(Qt.PointingHandCursor)
  
  
    # overriding key release event
    def keyReleaseEvent(self, e):
  
        # when escape key is released
        if e.key() == Qt.Key_Escape:
  
            # hide the calendar
            self.calendar.hide()
            print("Escape key released Hide the calendar")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：

Escape key released Hide the calendar