用户离开检查值时python pyqt5 qplaintextedit

问题是无法连接到qtextedit的focusoutevent。它不是一个信号,而是一个事件处理程序。必须重写类并从事件处理程序发出信号。

    self.plainTextEdit = CustomTextEdit()
    self.plainTextEdit.focus_out.connect(lambda:self.check_input(Dialog14))


class CustomTextEdit(QtWidgets.QTextEdit):

    focus_out = QtCore.pyqtSignal()

    def __init__(self):
        super().__init__()

    def focusOutEvent(self, event):
        super().focusOutEvent(event)
        self.focus_out.emit()