def row_selected(self, treeview, data = None):
        selection = self.get_selected ()
        # added to next line:  'or len(self.current_completions) == 0 :'
        if selection == None or len(self.current_completions) == 0 :
            return

        dict = self.current_completions[ selection ]
        apiInfo = ""
        if 'word' in dict:
            apiInfo = dict['word'] + "\n"
        if 'info' in dict:
            apiInfo = apiInfo + dict['info']
        if configuration.getShowApiInfoPanel():
            bottom_panel = Gedit.App.get_default().get_active_window().get_bottom_panel()
            bottom_panel.set_property("visible", True)
            self.apiInfoPanel.setText(apiInfo)
            self.apiInfoPanel.activate()