# load default category
        if (self.current):
            self.load(self.current)
        else:
            uikit.columns(self.gtk_list, self.datamap, [])
            
        # add to main menu
        uikit.add_menu([parent.channelmenuitems], self.meta["title"], lambda w: parent.channel_switch_by_name(self.module) or 1)

        
    # make private copy of .datamap and modify field (title= only ATM)
    def update_datamap(self, search="name", title=None):
        if self.datamap == GenericChannel.datamap:
            self.datamap = copy.deepcopy(self.datamap)
        for i,row in enumerate(self.datamap):
            if row[2][0] == search:

            self.save("settings")
            self.firstrun = 1


    # some defaults
    def defaults(self):
        self.play = {
           "audio/mpeg": self.find_player(),
           "audio/ogg": self.find_player(),
           "audio/*": self.find_player(),
           "video/youtube": self.find_player(typ="video") + " $(youtube-dl -g %srv)",
           "video/*": self.find_player(typ="video", default="vlc"),
           "url/http": self.find_player(typ="browser"),
        }
        self.record = {
           "audio/*": self.find_player(typ="xterm") + " -e streamripper %srv",   # -d /home/***USERNAME***/Musik
           "video/youtube": self.find_player(typ="xterm") + " -e \"youtube-dl %srv\"",
        }
        # these presets are a temporary workaround, until `priority:` is checked before module loading
        self.plugins = {
             # core plugins, cannot be disabled anyway
            "bookmarks": 1,
            "search": 1,
            "streamedit": 1,
            "configwin": 1,
            # standard channels
            "shoutcast": 1,
            "xiph": 1,
            "myoggradio": 1,
            "internet_radio": 1,
            "surfmusik": 1,
            "jamendo": 1,
            "icast": 1,
            "itunes": 1,
            # disabled per default
            "radiobrowser": 0,
            "youtube": 0,
            "modarchive": 0,
            "live365": 0,
            "radiotray": 0,
            "timer": 0,
            "history": 0,
            "global_key": 0,
            "useragentswitcher": 0,
            # obsolete / removed
            "file": 0,
            "punkcast": 0,

            "basicch": 0,
            "tv": 0,
        }
        self.tmp = os.environ.get("TEMP", "/tmp")
        self.max_streams = "500"
        self.show_bookmarks = 1
        self.show_favicons = 1
        self.load_favicon = 1
        self.heuristic_bookmark_update = 0

            if ("name" in opt) and ("value" in opt) and (opt["name"] not in vars(self)):
                self.__dict__[opt["name"]] = opt["value"]

        # plugin state
        if module and module not in conf.plugins:
             conf.plugins[module] = meta.get("priority") in ("core", "builtin", "default", "standard")

    # look at system binaries for standard audio players
    def find_player(self, typ="audio", default="xdg-open"):
        players = {
           "audio": ["audacious %g", "audacious2", "exaile %p", "xmms2", "banshee", "amarok %g", "clementine", "qmmp", "quodlibet", "aqualung", "mp3blaster %g", "vlc --one-instance %srv", "totem"],
           "video": ["parole", "umplayer", "xnoise", "gxine", "totem", "vlc --one-instance", "smplayer", "gnome-media-player", "xine", "bangarang"],
           "browser": ["opera", "midori", "sensible-browser"],
           "xterm": ["xfce4-terminal", "x-termina-emulator", "gnome-terminal", "xterm", "rxvt"],
        }
        for bin in players[typ]:
            if find_executable(bin.split()[0]):
                return bin
        return default
        
    # http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
    def xdg(self, path="/streamtuner2"):
        home = os.environ.get("HOME", self.tmp)
        config = os.environ.get("XDG_CONFIG_HOME", os.environ.get("APPDATA", home+"/.config"))
        
        # storage dir

#
def module_list():

    # Should list plugins within zips as well as local paths
    ls = pkgutil.iter_modules([conf.share+"/channels", "channels"])
    ls = [name for loader,name,ispkg in ls]
    
    # resort according to configured channel tab order
    order = re.findall("\w+", conf.channel_order.lower())
    ls = [module for module in (order) if (module in ls)] + [module for module in (ls) if (module not in order)]

    return ls



# Plugin meta data extraction

# url: http://freshcode.club/projects/streamtuner2
# config:  
#   { type: env, name: http_proxy, description: proxy for HTTP access }
#   { type: env, name: XDG_CONFIG_HOME, description: relocates user .config subdirectory }
# category: sound
# depends: pygtk | gi, threading, requests, pyquery, lxml
# id: streamtuner2
# pack: *.py, gtk*.xml, bin, channels/__init__.py, bundle/*.py, CREDITS, help/index.page,
#   streamtuner2.desktop=/usr/share/applications/, README=/usr/share/doc/streamtuner2/,
#   help/streamtuner2.1=/usr/share/man/man1/, NEWS.gz=/usr/share/doc/streamtuner2/changelog.gz,

#   logo.png=/usr/share/pixmaps/streamtuner2.png
# architecture: all
#
# Streamtuner2 is a GUI for browsing internet radio directories, music
# collections, and video services - grouped by genres or categories.
# It runs your preferred audio player, and streamripper for recording.
#
# It's an independent rewrite of streamtuner1. Being written in Python,

        "config_load": [],
        "config_save": [],
    }
    meta = plugin_meta()


    # status variables

    current_channel = "bookmarks"    # currently selected channel name (as index in self.channels{})


    # constructor
    def __init__(self):
        
        # Load stylesheet, instantiate GtkBuilder in self, menu and logo hooks
        gui_startup(0/20.0), uikit.load_theme(conf.get("theme"))
        gui_startup(1/20.0), gtk.Builder.__init__(self)

    # Custom-named widgets are available from .widgets{} not via .get_widget()
    def get_widget(self, name):
        if name in self.widgets:
            return self.widgets[name]
        else:
            return gtk.Builder.get_object(self, name)

            
    # Returns the currently selected directory/channel object (remembered position)
    def channel(self):
        return self.channels[self.current_channel]

    # List of module titles for channel tabs
    @property
    def channel_names(self):
        n = self.notebook_channels
        return [n.get_menu_label_text(n.get_nth_page(i)) for i in xrange(0, n.get_n_pages())]

    # Returns the currently selected directory/channel object (from gtk)
    def current_channel_gtk(self):
        return self.channel_names[self.notebook_channels.get_current_page()]
    

        
    # Notebook tab has been clicked (receives numeric page_num), but *NOT* yet changed (visually).
    def channel_switch(self, notebook, page, page_num=0, *args):



        self.current_channel = notebook.get_menu_label_text(notebook.get_nth_page(page_num))



        __print__(dbg.UI, "main.channel_switch():", "set current_channel :=", self.current_channel)
        
        # if first selected, load current category

        __print__(dbg.STAT, "TRY", "main.channel_switch(): ", self.current_channel + ".first_show()")
        try: self.channel().first_show()
        except: __print__(dbg.INIT, ".first_show() initialization error")

    # 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))


    # Convert ListStore iter to row number
    def rowno(self):
        (model, iter) = self.model_iter()
        return model.get_path(iter)[0]

    # Currently selected entry in stations list, return complete data dict

    # load plugins from /usr/share/streamtuner2/channels/
    def load_plugin_channels(self):

        # initialize plugin modules (pre-ordered)
        ls = module_list()
        for module in ls:
            gui_startup(4/20.0 + 13.5/20.0 * float(ls.index(module))/len(ls), "loading module "+module)

            # skip module if disabled
            if conf.plugins.get(module, 1) == False:
                __print__(dbg.STAT, "disabled plugin:", module)
                continue
            # or if it's a built-in (already imported)
            elif module in self.features or module in self.channels:
                continue
            
            # load plugin
            try:
                plugin = __import__("channels."+module, globals(), None, [""])
                #print [name for name,c in inspect.getmembers(plugin) if inspect.isclass(c)]
                plugin_class = plugin.__dict__[module]
                plugin_obj = plugin_class(parent=self)

                # add to .channels{}
                if issubclass(plugin_class, channels.GenericChannel):
                    self.channels[module] = plugin_obj


                # or .features{} for other plugin types
                else:
                    self.features[module] = plugin_obj
                
            except Exception as e:
                __print__(dbg.INIT, "load_plugin_channels: error initializing:", module, ", exception:")
                traceback.print_exc()