How to use the orange3.Orange.widgets.gui.ControlledCallFront function in Orange3

if value is not None:
            self.control.setValue(self.lookup.index(value))


class CallFrontLogSlider(ControlledCallFront):
    def action(self, value):
        if value is not None:
            if value < 1e-30:
                print(
                    "unable to set %s to %s (value too small)" % (self.control, value)
                )
            else:
                self.control.setValue(math.log10(value))


class CallFrontLineEdit(ControlledCallFront):
    def action(self, value):
        self.control.setText(str(value))


class CallFrontRadioButtons(ControlledCallFront):
    def action(self, value):
        if value < 0 or value >= len(self.control.buttons):
            value = 0
        self.control.buttons[value].setChecked(1)


class CallFrontListView(ControlledCallFront):
    def action(self, values):
        view = self.control
        model = view.model()
        sel_model = view.selectionModel()

if value == "":  # the latter accomodates PyListModel
            value = None
        if value is None and None not in self.model:
            return  # e.g. attribute x in uninitialized scatter plot
        if value in self.model:
            self.control.setCurrentIndex(self.model.indexOf(value))
            return
        elif isinstance(value, str):
            for i, val in enumerate(self.model):
                if value == str(val):
                    self.control.setCurrentIndex(i)
                    return
        raise ValueError("Combo box does not contain item " + repr(value))


class CallFrontHSlider(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontLabeledSlider(ControlledCallFront):
    def __init__(self, control, lookup):
        super().__init__(control)
        self.lookup = lookup

    def action(self, value):
        if value is not None:
            self.control.setValue(self.lookup.index(value))


class CallFrontLogSlider(ControlledCallFront):

class CallFrontDoubleSpin(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontCheckBox(ControlledCallFront):
    def action(self, value):
        if value is not None:
            values = [Qt.Unchecked, Qt.Checked, Qt.PartiallyChecked]
            self.control.setCheckState(values[value])


class CallFrontButton(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setChecked(bool(value))


class CallFrontComboBox(ControlledCallFront):
    def __init__(self, control, valType=None, emptyString=""):
        super().__init__(control)
        self.valType = valType
        self.emptyString = emptyString

    def action(self, value):
        if value in ("", None):
            value = self.emptyString
        if self.valType:
            for i in range(self.control.count()):

for i in range(self.control.count()):
                    self.control.item(i).setSelected(i == value)
            else:
                if not isinstance(value, ControlledList):
                    setattr(
                        self.control.ogMaster,
                        self.control.ogValue,
                        ControlledList(value, self.control),
                    )
                for i in range(self.control.count()):
                    shouldBe = i in value
                    if shouldBe != self.control.item(i).isSelected():
                        self.control.item(i).setSelected(shouldBe)


class CallFrontListBoxLabels(ControlledCallFront):
    unknownType = None

    def action(self, values):
        self.control.clear()
        if values:
            for value in values:
                if isinstance(value, tuple):
                    text, icon = value
                    if isinstance(icon, int):
                        item = QtWidgets.QListWidgetItem(attributeIconDict[icon], text)
                    else:
                        item = QtWidgets.QListWidgetItem(icon, text)
                elif isinstance(value, Variable):
                    item = QtWidgets.QListWidgetItem(*attributeItem(value))
                else:
                    item = QtWidgets.QListWidgetItem(value)

search_role = TableVariable
                else:
                    search_role = Qt.DisplayRole
                    value = str(value)
                for i in range(model.rowCount()):
                    if model.data(model.index(i), search_role) == value:
                        index = i
                        break
            else:
                index = value
            if index is not None:
                selection.select(model.index(index), model.index(index))
        sel_model.select(selection, sel_model.ClearAndSelect)


class CallFrontListBox(ControlledCallFront):
    def action(self, value):
        if value is not None:
            if isinstance(value, int):
                for i in range(self.control.count()):
                    self.control.item(i).setSelected(i == value)
            else:
                if not isinstance(value, ControlledList):
                    setattr(
                        self.control.ogMaster,
                        self.control.ogValue,
                        ControlledList(value, self.control),
                    )
                for i in range(self.control.count()):
                    shouldBe = i in value
                    if shouldBe != self.control.item(i).isSelected():
                        self.control.item(i).setSelected(shouldBe)

return
            if value:
                log.warning(
                    "Unable to set %s to '%s'. Possible values are: %s",
                    self.control,
                    value,
                    ", ".join(
                        self.control.itemText(i) for i in range(self.control.count())
                    ),
                )
        else:
            if value < self.control.count():
                self.control.setCurrentIndex(value)


class CallFrontComboBoxModel(ControlledCallFront):
    def __init__(self, control, model):
        super().__init__(control)
        self.model = model

    def action(self, value):
        if value == "":  # the latter accomodates PyListModel
            value = None
        if value is None and None not in self.model:
            return  # e.g. attribute x in uninitialized scatter plot
        if value in self.model:
            self.control.setCurrentIndex(self.model.indexOf(value))
            return
        elif isinstance(value, str):
            for i, val in enumerate(self.model):
                if value == str(val):
                    self.control.setCurrentIndex(i)

return
        elif isinstance(value, str):
            for i, val in enumerate(self.model):
                if value == str(val):
                    self.control.setCurrentIndex(i)
                    return
        raise ValueError("Combo box does not contain item " + repr(value))


class CallFrontHSlider(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontLabeledSlider(ControlledCallFront):
    def __init__(self, control, lookup):
        super().__init__(control)
        self.lookup = lookup

    def action(self, value):
        if value is not None:
            self.control.setValue(self.lookup.index(value))


class CallFrontLogSlider(ControlledCallFront):
    def action(self, value):
        if value is not None:
            if value < 1e-30:
                print(
                    "unable to set %s to %s (value too small)" % (self.control, value)
                )

def __call__(self, *args):
        if not self.disabled:
            opposite = getattr(self, "opposite", None)
            if opposite:
                try:
                    for op in opposite:
                        op.disabled += 1
                    self.action(*args)
                finally:
                    for op in opposite:
                        op.disabled -= 1
            else:
                self.action(*args)


class CallFrontSpin(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontDoubleSpin(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontCheckBox(ControlledCallFront):
    def action(self, value):
        if value is not None:
            values = [Qt.Unchecked, Qt.Checked, Qt.PartiallyChecked]
            self.control.setCheckState(values[value])

self.action(*args)


class CallFrontSpin(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontDoubleSpin(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontCheckBox(ControlledCallFront):
    def action(self, value):
        if value is not None:
            values = [Qt.Unchecked, Qt.Checked, Qt.PartiallyChecked]
            self.control.setCheckState(values[value])


class CallFrontButton(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setChecked(bool(value))


class CallFrontComboBox(ControlledCallFront):
    def __init__(self, control, valType=None, emptyString=""):
        super().__init__(control)
        self.valType = valType

op.disabled += 1
                    self.action(*args)
                finally:
                    for op in opposite:
                        op.disabled -= 1
            else:
                self.action(*args)


class CallFrontSpin(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontDoubleSpin(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setValue(value)


class CallFrontCheckBox(ControlledCallFront):
    def action(self, value):
        if value is not None:
            values = [Qt.Unchecked, Qt.Checked, Qt.PartiallyChecked]
            self.control.setCheckState(values[value])


class CallFrontButton(ControlledCallFront):
    def action(self, value):
        if value is not None:
            self.control.setChecked(bool(value))