PyQt5 QCalendarWidget 设置鼠标释放事件

在这篇文章中，我们将看到如何为QCalendarWidget实现鼠标释放事件。这个事件处理程序，对于事件来说，可以在一个子类中重新实现，以接收日历的鼠标释放事件。

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 mouseReleaseEvent method
    def mouseReleaseEvent(self, event):
        print("Mouse Release Event")

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mouseReleaseEvent，并在该事件中打印文本
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

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 mousePressEvent method
    def mousePressEvent(self, event):
        print("Mouse Press Event")

    # overriding the mousePressEvent method
    def mouseReleaseEvent(self, event):
        print("Mouse Release 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)



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

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

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

输出：

Mouse Press Event
Mouse Release Event
Mouse Press Event
Mouse Release Event
Mouse Press Event
Mouse Release Event