scoreboard.py

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

class Scoreboard():
    '''显示得分信息类''' 
    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 = (30, 30, 30) 
        self.font = pygame.font.SysFont(None, 48) 
        #准备当前得分图像和最高得分图像
        self.prep_score() 
        self.prep_high_score() 
        self.prep_level()
        self.prep_ships() 


    def prep_score(self):
        '''将当前得分转换为一幅渲染的图像'''
        rounded_score = int(round(self.stats.score, -1)) #让分数是10的倍数
        score_str = "{:,}".format(rounded_score)
        self.score_image = self.font.render(score_str, True, self.text_color, self.ai_settings.bg_color)
        #将得分放到屏幕右上角
        self.score_rect = self.score_image.get_rect() 
        self.score_rect.right = self.screen_rect.right - 20 
        self.score_rect.top = 20

    def prep_high_score(self):
        '''将最高得分转换为一幅渲染的图像'''
        rounded_score = int(round(self.stats.high_score, -1)) #让分数是10的倍数
        high_score_str = "{:,}".format(rounded_score)
        self.high_score_image = self.font.render(high_score_str, True, self.text_color, self.ai_settings.bg_color)
        #将最高得分放到屏幕正上方
        self.high_score_rect = self.high_score_image.get_rect() 
        self.high_score_rect.centerx = self.screen_rect.centerx 
        self.score_rect.top = self.screen_rect.top 
    
    def prep_level(self):
        '''将等级渲染为图像'''
        self.level_image = self.font.render(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):
        '''显示余下多少飞船''' 
        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)


    def show_score(self):
        '''在屏幕上显示当前得分和最高得分和等级''' 
        self.screen.blit(self.score_image, self.score_rect) 
        self.screen.blit(self.high_score_image, self.high_score_rect)
        self.screen.blit(self.level_image, self.level_rect)
        #绘制剩余飞船
        self.ships.draw(self.screen)