QCalendarWidget 弹出窗口关闭时如何执行操作？答案

【问题标题】：How to perform action when QCalendarWidget popup closes?QCalendarWidget 弹出窗口关闭时如何执行操作？
【发布时间】：2023-03-20 02:00:01
【问题描述】：

我正在使用带有QDateEdit.setCalendarPopup(True) 的QDateEdit 小部件。当日历弹出窗口关闭时，我正在尝试将插槽连接到事件。到目前为止，请参阅下面的示例，了解我在MyCalendarWidget 中的尝试。到目前为止，我的任何尝试都没有奏效。每次日历小部件弹出窗口关闭时，我该怎么做才能执行操作，不是仅在日期更改时？

from PyQt4 import QtGui, QtCore
import sys

class MainWindow(QtGui.QMainWindow):
    def __init__(self, *args):
        super(MainWindow,self).__init__(*args)
        self._date = QtGui.QDateEdit()
        self._date.setCalendarPopup(True)
        self._date.setCalendarWidget(MyCalendarWidget())
        self.setCentralWidget(self._date)

class App(QtGui.QApplication):
    def __init__(self, *args):
        super(App,self).__init__(*args)
        self.main = MainWindow()
        self.connect(self, QtCore.SIGNAL("lastWindowClosed()"), self.byebye )
        self.main.show()

    def byebye( self ):
        self.exit(0)

class MyCalendarWidget(QtGui.QCalendarWidget):
    def __init__(self, parent=None):
        print("mycal initialized")
        super(MyCalendarWidget, self).__init__(parent)

        self.installEventFilter(self)
        self._many = 2
        self._many2 = 2

    def focusInEvent(self, event):
        print('-'*self._many + 'focus in')
        if self._many == 2:
            self._many = 4
        else:
            self._many = 2
        super(MyCalendarWidget, self).focusInEvent(event)

    def focusOutEvent(self, event):
        print('-'*self._many2+'focus out')
        if self._many2 == 2:
            self._many2 = 4
        else:
            self._many2 = 2
        super(MyCalendarWidget, self).focusOutEvent(event)

    def closeEvent(self, event):
        print('close')
        super(MyCalendarWidget, self).closeEvent(event)

    def mouseReleaseEvent(self, event):
        print('mouse')
        super(MyCalendarWidget, self).mouseReleaseEvent(event)

def main(args):
    global app
    app = App(args)
    app.exec_()

if __name__ == "__main__":
    main(sys.argv)

【问题讨论】：

标签： python qt qt4 pyqt4

【解决方案1】：

想通了——原来我需要在QCalendarWidget 中使用clicked 信号。这也消除了子类QCalendarWidget 的需要。

from PyQt4 import QtGui, QtCore
import sys

class MainWindow(QtGui.QMainWindow):
    def __init__(self, *args):
        super(MainWindow,self).__init__(*args)
        self._date = QtGui.QDateEdit()
        self._date.setCalendarPopup(True)
        calendar = self._date.calendarWidget()
        calendar.clicked.connect(self._clicked)
        self.setCentralWidget(self._date)

    def _clicked(self, date):
        print('clicked')

class App(QtGui.QApplication):
    def __init__(self, *args):
        super(App,self).__init__(*args)
        self.main = MainWindow()
        self.connect(self, QtCore.SIGNAL("lastWindowClosed()"), self.byebye )
        self.main.show()

    def byebye( self ):
        self.exit(0)

def main(args):
    global app
    app = App(args)
    app.exec_()

if __name__ == "__main__":
    main(sys.argv)

【讨论】：