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本节讲解游戏界面中字体的处理,以在界面中实时显示当前时间、小球位置为例进行实验,具体见代码。
一、代码
# -*- coding:utf-8 -*-import osimport sysimport timeimport pygamefrom pygame.locals import *from pygame.font import *def load_image(pic_name):'''Function:图片加载函数Input:pic_name 图片名称Output: NONEauthor: socratesblog:http://blog.csdn.net/dyx1024date:2012-04-15'''#获取当前脚本文件所在目录的绝对路径current_dir = os.path.split(os.path.abspath(__file__))[0]#指定图片目录path = os.path.join(current_dir, 'image', pic_name)#加载图片return pygame.image.load(path).convert()def show_text(surface_handle, pos, text, color, font_bold = False, font_size = 13, font_italic = False): '''Function:文字处理函数Input:surface_handle:surface句柄pos:文字显示位置color:文字颜色font_bold:是否加粗font_size:字体大小font_italic:是否斜体Output: NONEauthor: socratesblog:http://blog.csdn.net/dyx1024date:2012-04-15''' #获取系统字体,并设置文字大小cur_font = pygame.font.SysFont("宋体", font_size)#设置是否加粗属性cur_font.set_bold(font_bold)#设置是否斜体属性cur_font.set_italic(font_italic)#设置文字内容text_fmt = cur_font.render(text, 1, color)#绘制文字surface_handle.blit(text_fmt, pos) def control_ball(event):'''Function:控制小球运动Input:eventOutput: NONEauthor: socratesblog:http://blog.csdn.net/dyx1024date:2012-04-15''' #相对偏移坐标speed = [x, y] = [0, 0]#速度speed_offset = 4#当方向键按下时,进行位置计算if event.type == pygame.KEYDOWN:if event.key == pygame.K_LEFT:speed[0] -= speed_offsetif event.key == pygame.K_RIGHT:speed[0] = speed_offsetif event.key == pygame.K_UP:speed[1] -= speed_offsetif event.key == pygame.K_DOWN:speed[1] = speed_offset#当方向键释放时,相对偏移为0,即不移动if event.type in (pygame.KEYUP, pygame.K_LEFT, pygame.K_RIGHT, pygame.K_DOWN) :speed = [0, 0]return speeddef play_ball():'''Function:主函数Input:NONEOutput: NONEauthor: socratesblog:http://blog.csdn.net/dyx1024date:2012-04-15''' pygame.init()#窗口大小window_size = Rect(0, 0, 700, 500)#设置窗口模式screen = pygame.display.set_mode(window_size.size)#设置窗口标题pygame.display.set_caption('运动的小球(2)-通过方向键控制小球移动')#加载小球图片ball_image = load_image('ball.gif')#加载窗口背景图片back_image = load_image('back_image.jpg')#获取小球图片的区域开状ball_rect = ball_image.get_rect()while True:#退出事件处理for event in pygame.event.get():if event.type == pygame.QUIT:pygame.quit()sys.exit()#使小球移动,速度由speed变量控制cur_speed = control_ball(event)#Rect的clamp方法使用移动范围限制在窗口内ball_rect = ball_rect.move(cur_speed).clamp(window_size)#设置窗口背景screen.blit(back_image, (0, 0))#在背景Surface上绘制 小球screen.blit(ball_image, ball_rect)text_time = u"时间:%s" % time.strftime("%H:%M:%S", time.gmtime())show_text(screen, (20, 400), text_time, (0, 255, 0), True)text_pos = u"小球位置:(%d,%d)" % (ball_rect.left, ball_rect.top)show_text(screen, (20, 420), text_pos, (0, 255, 255), True)author_info = u"作者:dyx1024"show_text(screen, (20, 440), author_info, (0, 0, 255), True, 13, True)title_info = u"文字测试"show_text(screen, (450, 20), title_info, (255, 0, 0), True, 40)#更新窗口内容pygame.display.flip()if __name__ == '__main__':play_ball()
二、测试 1、运行开始界面,小球位置为(0, 0)。
2、按下方向键,可见小球位置实时变动,当然,时间也是变动的。
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