QPaintEvent在stackedWidget - PyQt上绘制时禁用QLineEdit

from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QStackedWidget, QLineEdit
from PyQt5.QtGui import QPainter, QPaintEvent
from PyQt5.QtCore import Qt

class CustomWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.layout = QVBoxLayout()
        self.stackedWidget = QStackedWidget()
        self.layout.addWidget(self.stackedWidget)
        self.setLayout(self.layout)

        self.lineEdit = QLineEdit()
        self.stackedWidget.addWidget(self.lineEdit)

    def paintEvent(self, event: QPaintEvent):
        # 禁用QLineEdit
        self.lineEdit.setEnabled(False)

        painter = QPainter(self)
        painter.setPen(Qt.red)
        painter.drawText(event.rect(), Qt.AlignCenter, "Custom Paint")

if __name__ == '__main__':
    app = QApplication([])
    widget = CustomWidget()
    widget.show()
    app.exec_()