'Update the display label to reflect the value of the parameter.'

def updateDisplayLabel(self, value=None):

    if (value is None):
        value = self.param.value()
    opts = self.param.opts
    if isinstance(self.widget, QtGui.QAbstractSpinBox):
        text = asUnicode(self.widget.lineEdit().text())
    elif isinstance(self.widget, QtGui.QComboBox):
        text = self.widget.currentText()
    else:
        text = asUnicode(value)
    self.displayLabel.setText(text)
