filemenu.py 文件源码

def handle_event(self, event):
        """ File menu event handler

        :param event: event to handle
        """
        if not self.visible: return

        if event.type == USER_EVENT_TYPE and event.sub_type == SUB_TYPE_KEYBOARD and event.action == pygame.KEYUP:
            if event.keyboard_key == kbd_keys[KEY_LEFT]:
                if (self.filelist.current_item_index_in_page == 0 and self.filelist.current_item_index != 0) or self.filelist.current_item_index == 0:
                    if self.filelist.length <= self.filelist.items_per_page:
                        self.select_item_on_page(self.filelist.length - 1)
                    else:
                        self.turn_page_left()
                else:
                    self.select_item_on_page(self.filelist.current_item_index - 1) 
            elif event.keyboard_key == kbd_keys[KEY_RIGHT]:
                if self.filelist.current_item_index == self.filelist.length - 1 or self.filelist.current_item_index_in_page == self.filelist.items_per_page - 1:
                    if self.filelist.length <= self.filelist.items_per_page:
                        self.select_item_on_page(0)
                    else:
                        self.turn_page_right()
                else:
                    self.select_item_on_page(self.filelist.current_item_index + 1) 
            elif event.keyboard_key == kbd_keys[KEY_UP] or event.keyboard_key == kbd_keys[KEY_DOWN]:
                Menu.handle_event(self, event)
                self.filelist.set_current_item(self.selected_index)
                self.notify_menu_navigation_listeners(self.empty_state)
            elif event.keyboard_key == kbd_keys[KEY_SELECT]:
                Menu.handle_event(self, event)
        else:
            Menu.handle_event(self, event)