How to use the plottr.QtCore function in plottr

def setRole(self, dim, role, **kw):
        super().setRole(dim, role, **kw)

        item = self.findItems(dim, QtCore.Qt.MatchExactly, 0)[0]
        if role == 'Boo!':
            idx = kw.get('value', 0)
            w = self._makeSlider(value=idx)
            w.valueChanged.connect(lambda x: self.sliderChange(dim, role, x))

            self.choices[dim]['optionsWidget'] = w
            self.setItemWidget(item, 2, w)

super().__init__(parent=parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        self.plotDialogs = {}
        self.selectedFile = None
        self.newFiles = []

        self.monitorPath = os.path.abspath(monitorPath)
        self.refreshInterval = refreshInterval
        self.refreshFiles = partial(self.ui.fileList.loadFromPath, self.monitorPath,
                                    emitNew=True)
        self.ui.fileList.loadFromPath(self.monitorPath, emitNew=False)

        self.monitor = QtCore.QTimer()
        self.monitor.timeout.connect(self.refreshFiles)
        self.monitor.timeout.connect(self.plotQueuedFiles)
        self.monitor.start(self.refreshInterval * 1000)

super().__init__(parent=parent)

        self.plotDataType = PlotDataType.unknown
        self.plotType = PlotType.empty

        self.dataType = type(None)
        self.dataStructure = None
        self.dataShapes = None
        self.dataLimits = None

        # A toolbar for configuring the plot
        self.plotOptionsToolBar = _AutoPlotToolBar('Plot options', self)
        self.layout.insertWidget(1, self.plotOptionsToolBar)
        self.plotOptionsToolBar.plotTypeSelected.connect(
            self._plotTypeFromToolBar)
        self.plotOptionsToolBar.setIconSize(QtCore.QSize(32, 32))

        self.setMinimumSize(640, 480)

self._plot2d(axes, self.data, style='mesh')

        elif self.plotType is PlotType.scatter2d:
            logger.debug(f"Plot 2D data as scatter plot.")
            self._plot2d(axes, self.data, style='scatter')

        else:
            logger.info(f"No plot routine defined for {self.plotType}")
            return

        self.setMeta(self.data)
        if adjustSize:
            self.plot.autosize()
        else:
            self.plot.draw()
        QtCore.QCoreApplication.processEvents()

def setDimInfo(self, dim: str, info: str = ''):
        try:
            item = self.findItems(dim, QtCore.Qt.MatchExactly, 0)[0]
            item.setText(3, info)
        except IndexError:
            pass

def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(935, 569)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.splitter = QtWidgets.QSplitter(self.centralwidget)
        self.splitter.setOrientation(QtCore.Qt.Horizontal)
        self.splitter.setObjectName("splitter")
        self.fileList = DataFileList(self.splitter)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(1)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.fileList.sizePolicy().hasHeightForWidth())
        self.fileList.setSizePolicy(sizePolicy)
        self.fileList.setAlternatingRowColors(False)
        self.fileList.setUniformRowHeights(True)
        self.fileList.setObjectName("fileList")
        self.fileContents = DataFileContent(self.splitter)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(2)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.fileContents.sizePolicy().hasHeightForWidth())
        self.fileContents.setSizePolicy(sizePolicy)