def channel_switch(self, notebook, page, page_num=0, *args):
        self.current_channel = notebook.get_menu_label_text(notebook.get_nth_page(page_num))
        log.UI("main.channel_switch() :=", self.current_channel)
        self.update_title()
        # if first selected, load current category
        # (run in thread, to make it look speedy on first startup)
        self.thread( 
          self.channel().first_show
        )

    # Invoked from the menu instead, uses module name instead of numeric tab id
    def channel_switch_by_name(self, name):
        self.notebook_channels.set_current_page(self.channel_names.index(name))

    # Mirror selected channel tab into main window title

                
            except Exception as e:
                log.INIT("load_plugin_channels: error initializing:", name, ", exception:")
                traceback.print_exc()

    # load application state (widget sizes, selections, etc.)
    def init_app_state(self):

        winlayout = conf.load("window")
        if (winlayout):
            try: uikit.app_restore(self, winlayout)
            except Exception as e: log.APPSTATE_RESTORE(e) # may fail for disabled/reordered plugin channels

        #winstate = conf.state()    # now handled by channels.gui() already
        #if (winstate):
        #    for id,prev in winstate.items():
        #        try: self.channels[id].current = prev["current"]
        #        except Exception as e: log.APPSTATE_RESTORE(e)

    # store window/widget states (sizes, selections, etc.)
    def save_app_state(self, widget):
        # gtk widget states
        widgetnames = ["win_streamtuner2", "toolbar", "notebook_channels", ] \
                    + [id+"_list" for id in self.channel_names] \
                    + [id+"_cat" for id in self.channel_names]