def __init__(self, name, host='127.0.0.1', port=27017):
        self.name = name
        self.host = host
        self.port = port
def on_upper_bound_checked_changed(self):
        if self.ui.checkBoxUpperBound.isChecked():
            self.ui.spinBoxUpperBound.setEnabled(True)
            self.ui.spinBoxBoundaryNumber.setEnabled(True)
        elif not self.ui.checkBoxLowerBound.isChecked():
            self.ui.spinBoxUpperBound.setEnabled(False)
            self.ui.spinBoxBoundaryNumber.setEnabled(False)
        else:
            self.ui.spinBoxUpperBound.setEnabled(False)