# load data,
        # update treeview content
        def load(self, category, force=False):
        
            # get data from cache or download
            if (force or not category in self.streams):
                __print__(dbg.PROC, "load", "update_streams")
                self.parent.status("Updating streams...")
                self.parent.status(-0.1)
                new_streams = self.update_streams(category)
      
                if new_streams:

                    # check and modify entry;
                    # assert that title and url are present
                    modified = []

            #    self.gtk_list.set_model(self.liststore[category])
            #else:   # currently list is new, had not been converted to gtk array before
            #    self.liststore[category] = \
            mygtk.do(lambda:mygtk.columns(self.gtk_list, self.datamap, self.prepare(self.streams[category])))

            # set pointer
            self.current = category
            self.parent.status("")
            self.parent.status(1.0)
            pass
            
        # store current streams data
        def save(self):
            conf.save("cache/" + self.module, self.streams, gz=1)