PyQt5 QCalendarWidget – 设置动作事件

在本文中，我们将了解如何为 QCalendarWidget 实现动作事件。每当更改日历的操作时，都会使用给定事件调用此事件处理程序。此事件处理程序可以在子类中重新实现，以接收在事件参数中传递的日历操作事件。
下面是日历类代码

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

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

        # printing the text
        print("Action Changed")

Implementation steps:
1. Create a Calendar class that inherits the QCalendarWidget
2. Inside the Calendar class override the actionEvent 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. Add actions and delete the action of calendar

编程需要懂一点英语

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
 
# QCalendarWidget Class
class Calendar(QCalendarWidget):
 
    # constructor
    def __init__(self, parent = None):
        super(Calendar, self).__init__(parent)
 
    # overriding the actionEvent method
    def actionEvent(self, event):
 
        # printing the text
        print("Action Changed")
 
 
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)
 
        # creating a QAction objects
        action1 = QAction("Geek", self)
        action2 = QAction("Python", self)
 
        # creating action list
        action_list = [action1, action2]
 
        # adding actions to calendar
        self.calendar.addActions(action_list)
 
        # removing action
        self.calendar.removeAction(action1)
 
        # creating label to show the properties
        self.label = QLabel(self)
 
        # setting geometry to the label
        self.label.setGeometry(100, 280, 300, 100)
 
        # making label multi line
        self.label.setWordWrap(True)
 
        # getting action of the calendar
        value = self.calendar.actions()
 
        # setting text to the label
        self.label.setText("Actions : " + str(value))
 
 
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())

输出：

Action Changed
Action Changed
Action Changed

“Action Changed”打印了 3 次，因为添加了两个动作，删除了一个动作。