1. pygame事件
import pygame
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 600))
screen.fill((255, 255, 255))
# 设置窗口标题
pygame.display.set_caption('游戏事件')
pygame.display.flip()
QUIT:关闭按钮被点击事件
MOUSEBUTTONDOWN:鼠标按下事件
MOUSEBUTTONUP:鼠标弹起事件
MOUSEMOTION:鼠标移动事件
鼠标相关事件关心事件产生的位置
KEYDOWN:键盘按钮被按下
KEYUP:键盘按钮弹起
while True:
# 每次循环检测有没有事件发生
for event in pygame.event.get():
# 不同类型的事件对应的type值不一样
if event.type == pygame.QUIT:
exit()
# 鼠标相关事件
# pos属性,获取鼠标事件产生的位置
if event.type == pygame.MOUSEBUTTONDOWN:
print('鼠标按下', event.pos)
if event.type == pygame.MOUSEBUTTONUP:
print('鼠标弹起', event.pos)
if event.type == pygame.MOUSEMOTION:
print('鼠标移动', event.pos)
# 键盘相关事件
# key属性,被按的按键对应的值的编码
if event.type == pygame.KEYDOWN:
print('键盘按键被按下', chr(event.key))
if event.type == pygame.KEYUP:
print('键盘按钮弹起', chr(event.key))
2. 鼠标事件的应用
import pygame
from random import randint
def rand_color():
# 产生随机颜色
return (randint(0, 255), randint(0, 255), randint(0, 255))
def draw_ball(screen, pos):
pygame.draw.circle(screen, rand_color(), pos, randint(10, 20))
# 只要屏幕上的内容有更新,都需要调用下面这两个方法的一种
# pygame.display.flip()
pygame.display.update()
# 写一个函数,判断指定的点是否在指定的矩形范围中
def is_in(point, rect):
x, y = point
rx, ry, rw, rh = rect
if (rx <= x <= rx + rw) and (ry <= y <= ry + rh):
return True
return False
# 写一个函数,画一个按钮
def draw_button(sceen, btn_color, title_color):
"""矩形框"""
pygame.draw.rect(screen, btn_color, (300, 300, 130, 80))
"""文字"""
font = pygame.font.SysFont('华文隶书', 30)
title = font.render('小菜鸡', True, title_color)
screen.blit(title, (320, 320))
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 600))
screen.fill((0, 0, 0))
pygame.display.set_caption('鼠标事件')
# 画个按钮
draw_button(screen, (255, 255, 0), (0, 0, 255))
# """矩形框"""
# pygame.draw.rect(screen, (255, 255, 0), (300, 300, 130, 80))
# """文字"""
# font = pygame.font.SysFont('华文隶书', 30)
# title = font.render('小菜鸡', True, (0, 0, 255))
# screen.blit(title, (320, 320))
pygame.display.flip()
while True:
for event in pygame.event.get():
# 退出
if event.type == pygame.QUIT:
exit()
if event.type == pygame.MOUSEBUTTONDOWN:
# 在指定的坐标处画一个球
# draw_ball(screen, event.pos)
if is_in(event.pos, (300, 300, 130, 80)):
draw_button(screen, (255, 0, 0), (255, 255, 255))
pygame.display.flip()
if event.type == pygame.MOUSEBUTTONUP:
if is_in(event.pos, (300, 300, 130, 80)):
draw_button(screen, (255, 255, 0), (0, 0, 255))
pygame.display.update()
if event.type == pygame.MOUSEMOTION:
screen.fill((0, 0, 0))
draw_button(screen, (255, 255, 0), (0, 0, 255))
draw_ball(screen, event.pos)
3. 鼠标事件的应用
# 要求,先在屏幕上显示一张图片,鼠标按下移动的时候,拽着图片跟着一起动。鼠标弹起就不动了
import pygame
# 写一个函数,判断一个点是否在某个范围内
def is_in_rect(pos, rect):
x, y = pos
rx, ry, rw, rh = rect
if (rx <= x <= rx + rw) and (ry <= y <= ry + rh):
return True
return False
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 600))
screen.fill((0, 0, 0))
pygame.display.set_caption('图片移动')
# 显示一张图片
image = pygame.image.load('./3.png')
image_x = 100
image_y = 100
screen.blit(image, (image_x, image_y))
pygame.display.flip()
# 用来存储图片是否可以移动
is_move = False
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit()
# 鼠标按下,让状态变成可以移动
if event.type == pygame.MOUSEBUTTONDOWN:
w,h = image.get_size()
if is_in_rect(event.pos, (image_x, image_y, w, h)):
is_move = True
# 鼠标弹起,状态不可移动
if event.type == pygame.MOUSEBUTTONUP:
is_move = False
# 鼠标移动对应的事件
if event.type == pygame.MOUSEMOTION:
if is_move:
screen.fill((0, 0, 0))
x, y = event.pos
image_w, image_h = image.get_size()
# 保证鼠标在图片中心
image_y = y - image_h/2
image_x = x - image_w/2
screen.blit(image, (image_x, image_y))
pygame.display.update()
4. 动画效果
"""
动画原理:不断地刷新界面上的内容(一帧一帧的画)
"""
import pygame
from random import randint
def static_page(screen):
"""
页面上的静态内容
"""
# 静态文字
font = pygame.font.SysFont('华文隶书', 40)
title = font.render('小辣鸡', True, (255, 255, 0))
screen.blit(title, (200, 200))
def animation_title(screen):
"""
字体颜色发生改变
"""
font = pygame.font.SysFont('华文隶书', 40)
title = font.render('小辣鸡', True, (randint(0, 255), randint(0, 255), randint(0, 255)))
screen.blit(title, (300, 300))
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 600))
screen.fill((0, 0, 0))
pygame.display.set_caption('动画')
static_page(screen)
pygame.display.flip()
while True:
# for循环里面的代码只有事件发生后才会执行
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit()
# 在下边写每一帧要显示的内容
"""程序执行到这个位置,CPU休息一段时间再执行后面的代码(线程在这儿阻塞指定的时间)
单位:毫秒 1000ms = 1s
"""
pygame.time.delay(500)
# 动画前要将原来的内容全部清空
screen.fill((0, 0, 0))
static_page(screen)
animation_title(screen)
# 内容展示完成后,要更新到屏幕上
pygame.display.update()
5. 小球游戏
import pygame
def draw_ball(place, color, pos):
"""
画球
"""
pygame.draw.circle(place, color, pos, 20)
# 方向键对应的值
Up = 119
Left = 97
Down = 115
Right = 100
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 600))
screen.fill((0, 0, 0))
pygame.display.set_caption('球移动')
pygame.display.flip()
# 保存初始坐标
ball_x = 100
ball_y = 100
x_speed = 1
y_speed = 0
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit()
if event.type == pygame.KEYDOWN:
if event.key == Up:
y_speed = -5
x_speed = 0
elif event.key == Down:
y_speed = 5
x_speed = 0
elif event.key == Left:
x_speed = -5
y_speed = 0
elif event.key == Right:
x_speed = 5
y_speed = 0
# 刷新屏幕
screen.fill((0, 0, 0))
# 每次循环让球的x和y变化
pygame.time.delay(10)
ball_x += x_speed
ball_y += y_speed
if ball_x + 20 >= 800 or ball_x - 20 <= 0 or ball_y + 20 >= 600 or ball_y - 20 <= 0:
print('死求了')
exit()
if ball_x + 20 >= 800:
ball_x = 800 -20
x_speed = -1
if ball_x - 20 <= 0:
ball_x = 20
x_speed = 1
if ball_y + 20 >= 600:
ball_y = 600 - 20
y_speed = -1
if ball_y - 20 <= 0:
ball_y = 20
y_speed = 1
draw_ball(screen, (255, 255, 0), (ball_x, ball_y))
pygame.display.update()
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