class BookAuthor(MenuScreen):
""" Authors screen """
def __init__(self, util, listeners, ch, f, go_author, parser, base_url,
voice_assistant, d):
""" Initializer
:param util: utility object
:param listeners: screen listeners
:param ch: selected character
:param f: selected filter
:param go_authors: callback
:param parser: authors parser
:param base_url: url
:param d: dictionary with menu button flags
"""
self.util = util
self.factory = Factory(util)
self.base_url = base_url
self.config = util.config
self.parser = parser
self.current_author_char = ch
self.current_author_filter = f
self.go_author = go_author
self.author_cache = {}
self.title = self.config[LABELS][KEY_AUTHORS]
MenuScreen.__init__(self, util, listeners, MENU_ROWS, MENU_COLUMNS,
voice_assistant, d, self.turn_page)
m = self.factory.create_book_author_menu_button
self.authors_menu = MultiPageMenu(util, self.next_page,
self.previous_page, self.set_title,
self.reset_title, self.go_to_page, m,
MENU_ROWS, MENU_COLUMNS, None,
(0, 0, 0), self.menu_layout)
self.set_menu(self.authors_menu)
def set_current(self, ch=None, f=None):
""" Apply selected character and filter
:param ch: selected character
:param f: selected filter
"""
if not ch and not f:
return
self.set_loading(self.config[LABELS][KEY_AUTHORS])
self.total_pages = 0
self.current_page = 1
self.current_author_char = ch
self.current_author_filter = f
try:
self.author_cache[ch]
except:
self.get_authors()
self.turn_page()
self.reset_loading()
def get_authors(self):
""" Get authors from parser """
self.parser.author_parser.current_author_char = self.current_author_char
self.parser.author_parser.url = self.base_url
authors = self.parser.get_authors()
if authors:
self.author_cache[self.current_author_char] = authors
def turn_page(self):
""" Turn authors page """
self.authors_menu.set_items({}, 0, self.go_author)
filtered_authors = []
for a in self.author_cache[self.current_author_char]:
if self.current_author_filter:
if a[AUTHOR_NAME].startswith(self.current_author_filter):
filtered_authors.append(a)
else:
filtered_authors.append(a)
start = (self.current_page - 1) * PAGE_SIZE
end = self.current_page * PAGE_SIZE
page = filtered_authors[start:end]
self.author_dict = self.factory.create_book_author_items(page)
self.authors_menu.set_items(self.author_dict, 0, self.go_author, False)
self.authors_menu.align_content(ALIGN_LEFT)
self.authors_menu.select_by_index(0)
self.authors_menu.clean_draw_update()
self.total_pages = math.ceil(len(filtered_authors) / PAGE_SIZE)
left = str(self.current_page - 1)
if self.total_pages == 0:
right = "0"
else:
right = str(self.total_pages - self.current_page)
self.navigator.left_button.change_label(left)
self.navigator.right_button.change_label(right)
self.set_title(self.current_page)
def add_screen_observers(self, update_observer, redraw_observer):
""" Add screen observers
:param update_observer: observer for updating the screen
:param redraw_observer: observer to redraw the whole screen
"""
self.navigator.add_observers(update_observer, redraw_observer)
self.authors_menu.add_menu_loaded_listener(redraw_observer)
self.authors_menu.add_menu_observers(update_observer,
redraw_observer,
release=False)
