PyQt5 QCalendarWidget 设置关闭事件

在这篇文章中，我们将看到如何为QCalendarWidget实现关闭事件。当Qt收到来自窗口系统的关闭日历的请求时，这个事件处理程序会被调用，并给出事件。默认情况下，该事件被接受，日历被关闭。我们可以重新实现这个函数来改变小部件对窗口关闭请求的响应方式。

下面是日历类的代码

# QCalendarWidget Class
class Calendar(QCalendarWidget):

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

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

        # setting text to the label
        print("Close Event Called")

实施步骤：
1.创建一个继承了QCalendarWidget的日历类
2.在日历类中覆盖closeEvent，并在事件中打印文本
3.创建一个主窗口类
4.在主窗口中创建一个日历对象
5.为日历设置各种属性
6.关闭日历

下面是实现的过程

# 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 closeEvent method
    def closeEvent(self, event):

        # setting text to the label
        print("Close Event Called")


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)

        # close the calendar
        self.calendar.close()




# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())