def __init__(self, *args): QtGui.QWidget.__init__(self, None) self.ui = Ui_searchWidget() self.ui.setupUi(self) # set initial states self.ui.checkBoxNepomuk.setChecked(True) # set signals self.ui.checkBoxNepomuk.connect(self.ui.checkBoxNepomuk, SIGNAL("toggled(bool)"), self.enableSearch)