PyQt5 QCalendarWidget – 设置自定义事件
在本文中,我们将了解如何为 QCalendarWidget 实现自定义事件。此事件处理程序可以在子类中重新实现以接收自定义事件。自定义事件是用户定义的事件,其类型值至少与 QEvent::Type 枚举的 QEvent::User 项一样大,并且通常是 QEvent 子类。
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 customEvent method
def customEvent(self, event):
print("Custom Event")
Implementation steps:
1. Create a Calendar class that inherits the QCalendarWidget
2. Inside the Calendar class override the customEvent 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. Connect a signal to the custom event
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 customEvent method
def customEvent(self, event):
print("Custom Event")
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.selectionChanged.connect(lambda : self.calendar.customEvent("Change"))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :
Custom Event
Custom Event
Custom Event
Custom Event