def gui(self, parent):

        # save reference to main window/glade API
        self.parent = parent
        self.gtk_list = parent.get_widget(self.module+"_list")
        self.gtk_cat = parent.get_widget(self.module+"_cat")
        
        # category tree
        # last category, and prepare genre tree
        self.current = conf.state(self.module).get("current")
        self.display_categories()
        

        # update column names
        for field,title in list(self.titles.items()):
            self.update_datamap(field, title=title)
        
        # prepare stream list
        if (not self.rowmap):
            for row in self.datamap:

    def status(self, *v):
        if self.parent: self.parent.status(*v)
        else: log.INFO("status():", *v)


        
    #--------------------- streams/model data accesss ---------------------------

    # traverse category TreeModel to set current, expand parent nodes
    def select_current(self, name):
        log.UI("reselect .current category in treelist:", name)
        model = self.gtk_cat.get_model()
        iter = model.get_iter_first()
        self.iter_cats(name, model, iter)

    # iterate over children to find current category        
    def iter_cats(self, name, model, iter):
        while iter:
            val = model.get_value(iter, 0)
            if val == name:
                #log.UI("FOUND CATEGORY", name, "→select")
                self.gtk_cat.get_selection().select_iter(iter)
                self.gtk_cat.set_cursor(model.get_path(iter))
                return True
            if model.iter_has_child(iter):
                found = self.iter_cats(name, model, model.iter_children(iter))
                if found:
                    self.gtk_cat.expand_row(model.get_path(iter), 0)
                    return True
            iter = model.iter_next(iter)
        
    # selected category
    def currentcat(self):
        (model, iter) = self.gtk_cat.get_selection().get_selected()
        if (type(iter) == gtk.TreeIter):
            self.current = model.get_value(iter, 0)
        return self.current
        
    # Get list of stations in current category
    def stations(self):
        return self.streams.get(self.current, [])

    # Convert ListStore iter to row number
    def rowno(self):

            else:
                # parse error
                self.status("Category parsed empty.")
                self.streams[category] = self.nothing_found
                log.INFO("Oooops, parser returned nothing for category " + category)
                
        # Update treeview/model (if category is still selected)
        log.UI("load columns datamap streams")
        if self.current == category:
            log.UI("load() → uikit.columns({}.streams[{}])".format(self.module, category), [inspect.stack()[x][3] for x in range(1,5)])
            uikit.do(uikit.columns, self.gtk_list, self.datamap, self.prepare(self.streams[category]))
            if y:
                uikit.do(self.gtk_list.scroll_to_point, 0, y + 1)   # scroll to previous position, +1 px, because
                # somehow Gtk.TreeView else stumbles over itself when scrolling to the same position the 2nd time

        # set pointer
        self.status("")
        # unset statusbar
        self.status()
        self.status(1.0)

        
    # store current streams data
    def save(self):
        conf.save("cache/" + self.module, self.streams, gz=1)

            except:
                log.ERR("HTTP error or extraction failure.")
                self.categories = ["empty"]
            self.display_categories()

        # Select first category
        if not self.current:
            log.STAT(self.module, "→ first_show(); use first category as current =", self.current)
            self.current = self.str_from_struct(self.categories) or None
            log.STAT(self.module, "→ first_show(); use first category as current =", self.current)
            self.shown = 0,

        # put selection/cursor on last position
        if True:
            uikit.do(self.select_current, self.current)
            #uikit.do(lambda:self.gtk_list.get_selection().select_path(self.shown))

        # Show current category in any case
        log.UI(self.module, "→ first_show(); station list → load(", self.current, ")")
        self.load(self.current)
    
        # put selection/cursor on last position
        if True:#self.shown != None:
            log.STAT(self.module+".first_show()", "select last known category treelist position =", self.shown)
            try:
                uikit.do(lambda:self.gtk_list.get_selection().select_path(self.shown))
            except:
                pass
            
        # Invoke only once
        self.shown = 55555


    # Retrieve first list value, or key from dict (-- used to get first category on init)
    def str_from_struct(self, d):

        # display outside of this non-main thread
        uikit.do(self.display_categories)


    # insert content into gtk category list
    def display_categories(self):
        log.UI(self.module+".display_categories()", "mk tree, expand_all, select first path, currentcat")
        log.UI("{}.display_categories(), uikit.tree(#{}), expand_all(#<20), select_current(={})".format(self.module, len(self.categories), self.current))
    
        # rebuild gtk.TreeView
        uikit.tree(self.gtk_cat, self.categories, title="Category", icon=gtk.STOCK_OPEN)

        # if it's a short list of categories, there's probably subfolders
        if len(self.categories) < 20:
            self.gtk_cat.expand_all()
            
        # select any first element
        self.gtk_cat.get_selection().select_path("0") #set_cursor
        self.currentcat()
        # Select last .current or any first element
        if self.current:
            self.select_current(self.current)
            #self.currentcat()
        #else: self.gtk_cat.get_selection().select_path("0") #set_cursor

            
    # selected category
    def currentcat(self):
        (model, iter) = self.gtk_cat.get_selection().get_selected()
        if (type(iter) == gtk.TreeIter):
            self.current = model.get_value(iter, 0)
        return self.current

    
    # Insert/append new station rows - used by importing/drag'n'drop plugins
    def insert_rows(self, rows, y=None):
        streams = self.streams[self.current]
        tv = self.gtk_list