scoreboard.py

import pygame.font
from pygame.sprite import Group
from ship import Ship


class Scoreboard():
    """ 显示得分信息的类"""

    def __init__(self, ai_settings, screen, stats):
        """ 初始化显示得分涉及的属性"""
        self.screen = screen
        self.screen_rect = screen.get_rect()
        self.ai_settings = ai_settings
        self.stats = stats

        # 显示得分信息时使用的字体设置
        self.text_color = (0, 0, 0)
        self.font = pygame.font.SysFont(None, 48)
        self.prep_images()

    def prep_images(self):
        # 准备包含 最高得分、当前得分、游戏等级、飞船 的图像
        self.prep_score()
        self.prep_high_score()
        self.prep_level()
        self.prep_ships()

    def prep_score(self):
        """ 将得分转换为一副渲染的图像"""
        rouned_score = int(round(self.stats.score, -1))
        score_str = 'score:'+"{:,}".format(round(rouned_score))
        self.score_iamge = self.font.render(score_str, True, self.text_color, self.ai_settings.bg_color)

        """ 将得分放在屏幕右上角"""
        self.score_rect = self.score_iamge.get_rect()
        self.score_rect.right = self.screen_rect.right - 6
        self.score_rect.top = 12

    def show_score(self):
        """ 在屏幕上显示飞船和得分"""
        self.screen.blit(self.score_iamge, self.score_rect)
        self.screen.blit(self.high_score_iamge, self.high_score_rect)
        self.screen.blit(self.level_image, self.level_rect)
        # 绘制飞船
        self.ships.draw(self.screen)

    def prep_high_score(self):
        """ 将最高得分转换为渲染的图像"""
        high_score = int(round(self.stats.high_score, -1))
        high_score_str = 'Highest: '+"{:,}".format(high_score)
        self.high_score_iamge = self.font.render(high_score_str, True, self.text_color, self.ai_settings.bg_color)

        # 将最高得分放在屏幕顶部中央
        self.high_score_rect = self.high_score_iamge.get_rect()
        self.high_score_rect.centerx = self.screen_rect.centerx
        self.high_score_rect.top = self.score_rect.top

    def prep_level(self):
        """ 将等级转换为渲染的图像"""
        self.level_image = self.font.render('level:'+str(self.stats.level), True, self.text_color, self.ai_settings.bg_color)

        # 将等级放在得分下方
        self.level_rect = self.level_image.get_rect()
        self.level_rect.right = self.score_rect.right
        self.level_rect.top = self.score_rect.bottom + 10

    def prep_ships(self):
        """ 显示还余下多少艘飞船"""
        self.ships = Group()
        for ship_number in range(self.stats.ships_left):
            ship = Ship(self.ai_settings, self.screen)
            ship.rect.x = 10 + ship_number * ship.rect.width
            ship.rect.y = 10
            self.ships.add(ship)