# * coding=utf8
# Python(pygame)实现代码雨
# 今日头条: 明哥读世界
# 微博：明哥读世界
# 个人博客:https://www.mylasting.com
#
import sys
import random
import pygame
from pygame.locals import *


# 屏幕大小
WIDTH = 800
HEIGHT = 600
# 下落速度范围
SPEED = [20, 40]
# CODE String列表
LEN = ['PHP','Python','C++','Java','C#','javascript','GoLang','Ruby','Android','Vue','swift','basic','.net']


# 随机生成一个颜色
def randomColor():
	return (0,238,0)
	return (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))


# 随机生成一个速度
def randomSpeed():
	return random.randint(SPEED[0], SPEED[1])


# 随机生成一个位置
def randomPos():
	return (random.randint(0, WIDTH), -20)


# 随机生成一个字符串
def randomCode():
	return LEN[random.randint(1,len(LEN))-1]

# 随机生成字体大小
def randomSize():
	return random.randint(12,36)

# 定义代码精灵类
class Code(pygame.sprite.Sprite):
	def __init__(self):
		pygame.sprite.Sprite.__init__(self)
		self.code= randomCode()
		self.font = pygame.font.Font('./font.ttf', randomSize())
		self.speed = randomSpeed()
		self.image = self.font.render(self.code, True, randomColor())
		self.image = pygame.transform.rotate(self.image, random.randint(90, 90))#以垂直方式下落
		self.rect = self.image.get_rect()
		self.rect.topleft = randomPos()
	def update(self):
		self.rect = self.rect.move(0, self.speed)
		if self.rect.top > HEIGHT:
			#当精灵位置超出屏幕，销毁
			self.kill()
pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption('code_rain - 明哥读世界')
clock = pygame.time.Clock()
codesGroup = pygame.sprite.Group()
while True:
	clock.tick(24) #帧数
	for event in pygame.event.get():
		#监听关闭事件
		if event.type == QUIT:
			pygame.quit()
			sys.exit(0)
	screen.fill((1, 1, 1)) #填充背景色，相当于clear
	#新建一个精灵
	codeobject = Code()
	codesGroup.add(codeobject)
	# 监控并销毁
	codesGroup.update()
	codesGroup.draw(screen)
	pygame.display.update()