def METHOD_NAME(self, event):
    """
    :param qt.QPaintEvent event: Qt event
    """
    # Inherite paint event to be able to custom initStyleOption.
    # It's a protected function that can't be hinerited by Python.
    painter = qt.QStylePainter(self)
    painter.setPen(self.palette().color(qt.QPalette.Text))
    # draw the combobox frame, focusrect and selected etc.
    opt = qt.QStyleOptionComboBox()
    self.initStyleOption(opt)
    painter.drawComplexControl(qt.QStyle.CC_ComboBox, opt)
    # draw the icon and text
    painter.drawControl(qt.QStyle.CE_ComboBoxLabel, opt)