PyQt5 QCalendarWidget – 设置进入事件

在本文中，我们将了解如何实现 QCalendarWidget 的 enter 事件。当鼠标光标进入日历时，将向日历发送一个 enter 事件。此事件处理程序可以在子类中重新实现，以接收在 event 参数中传递的日历输入事件。
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 enter event
    def enterEvent(self, event):

        # setting to the text to the label
        window.label.setText("Enter Event Take place")

Implementation steps: 
1. Create a Calendar class that inherits the QCalendarWidget 
2. Inside the Calendar class override the enterEvent and inside the event set the text to the label 
3. Create a main window class 
4. Create a Calendar object inside the main window 
5. Set various properties to 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
 
# QCalendarWidget Class
class Calendar(QCalendarWidget):
 
    # constructor
    def __init__(self, parent = None):
        super(Calendar, self).__init__(parent)
 
    # overriding the enter event
    def enterEvent(self, event):
 
        # setting to the text to the label
        window.label.setText("Enter Event Take place")
 
    # overriding the leave event
    def leaveEvent(self, event):
 
        # setting to the text to the label
        window.label.setText("Leave Event Take place")
 
 
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 label to show the properties
        self.label = QLabel(self)
 
        # setting geometry to the label
        self.label.setGeometry(100, 280, 250, 60)
 
        # making label multi line
        self.label.setWordWrap(True)
 
        # setting text to the label
        self.label.setText("No Event")
 
 
 
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())

输出 ：