dndred

class MyCheckBox(QCheckBox):
    def __init__(self, target_edit:QLineEdit, parent):
        super().__init__(parent)
        self._target_edit = target_edit
        self.stateChanged.connect(self._stateChanged_slot)

    def _stateChanged_slot(self):
        self._target_edit.setReadOnly(not self._target_edit.isReadOnly())