def wait_and_listen_for_keypress(self, observer: CursesMenuControllerObserver):
self.highlighted_menu_option_index = self.data_source.initially_highlighted_menu_option_index(controller=self)
menu_options_count = self.data_source.menu_options_count(controller=self)
waiting_for_next_keypress = True
while waiting_for_next_keypress:
self.refresh(observer=observer)
keypress_integer = self.keypress_listener()
close_menu_key_set = self.key_bindings.close_menu_keys(controller=self)
select_individual_menu_option_key_set = self.key_bindings.select_option_keys(controller=self)
highlight_menu_option_key_set = self.key_bindings.highlight_keys(controller=self,
menu_options_count=menu_options_count)
next_menu_option_key_set = self.key_bindings.next_keys(controller=self)
previous_menu_option_key_set = self.key_bindings.previous_keys(controller=self)
if keypress_integer in close_menu_key_set:
observer.did_signal_intent_to_close_menu(controller=self)
break
elif keypress_integer in select_individual_menu_option_key_set:
should_dismiss_menu = observer.did_select_menu_option_at_index(controller=self,
menu_option_index=self.highlighted_menu_option_index)
if should_dismiss_menu:
break
elif keypress_integer in highlight_menu_option_key_set:
key_char = int(chr(keypress_integer))
self.highlighted_menu_option_index = key_char
elif keypress_integer in next_menu_option_key_set:
self.highlighted_menu_option_index = (self.highlighted_menu_option_index + 1) % menu_options_count
elif keypress_integer in previous_menu_option_key_set:
self.highlighted_menu_option_index = (self.highlighted_menu_option_index - 1) % menu_options_count
def refresh(self, observer: CursesMenuControllerObserver = None):
super().refresh()
if observer:
observer.will_redisplay_updated_menu_options(controller=self)
for menu_option_index in range(self.data_source.menu_options_count(controller=self)):
menu_option_display_number = menu_option_index
menu_option_display_number_string = "{}. ".format(menu_option_display_number)
menu_option_title_text = self.data_source.text_for_menu_option_at_index(controller=self,
menu_option_index=menu_option_index)
title = "{} ".format(menu_option_title_text)
highlighted_color = self.highlighter.highlighted_menu_option_color_pair(controller=self)
normal_color = self.highlighter.non_highlighted_menu_option_color_pair(controller=self)
color = highlighted_color if menu_option_index == self.highlighted_menu_option_index else normal_color
self._window.addstr(menu_option_index + self.text_inset_y, self.text_inset_x,
menu_option_display_number_string,
normal_color)
self._window.addstr(menu_option_index + self.text_inset_y,
self.text_inset_x + len(menu_option_display_number_string), title, color)
if observer:
observer.did_redisplay_updated_menu_options(controller=self)
