def loader_cb(data):
			topic_list = Analyze.getTopicList(data)
			if topic_list is not None:
				store.clear()
				for topic in topic_list:
					chartName = topic['name'].encode("utf-8")
					chartId = topic['id']
					chartType = topic['type']
					chartPicURL = topic['picURL']
					chartDesc = topic['desc'].encode("utf-8")
					store.append([chartName, chartId, chartType, chartPicURL, chartDesc])
				self.load_label.set_label(_("Loaded"))
			else:
				msgBox = gtk.MessageDialog(parent=self.dialog, flags=gtk.DIALOG_MODAL, type=gtk.MESSAGE_ERROR, 
							buttons=gtk.BUTTONS_CLOSE, message_format=_("No more topic list!"))
				msgBox.connect("response", lambda a, b: msgBox.hide())
				msgBox.run()
				self.load_label.set_label(_("Loaded"))