一、事件
- 鼠标的事件：
QUIT：关闭按键被点击事件
MOUSEBUTTONDOWN:鼠标按键按下事件
MOUSEBUTTONUP:鼠标按键弹起事件
MOUSEMOTION:鼠标移动事件 - 键盘的事件：
KEYDOWN:键盘上的按键按下
KEYUP:键盘上的按键弹起
import pygame
if __name__ == '__main__':
# 初始化
pygame.init()
# 定义窗口大小
screen = pygame.display.set_mode((800, 450))
# 填充背景色
screen.fill((255, 255, 255))
# 设置窗口标题
pygame.display.set_caption('小游戏_游戏事件')
# 显示
pygame.display.flip()
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type值不一样
if event.type == pygame.QUIT:
# 退出程序
exit(0)
# 鼠标按下事件
if event.type == pygame.MOUSEBUTTONDOWN:
# 打印鼠标按下时的位置
print('鼠标被按下', event.pos)
# 鼠标按键弹起
if event.type == pygame.MOUSEBUTTONUP:
# 打印鼠标弹起时的位置
print('鼠标弹起', event.pos)
# 鼠标移动事件
# if event.type == pygame.MOUSEMOTION:
# print('鼠标移动')
# 键盘相关事件
# 按键按下
# key属性，被按的按键对应的值的ascii码
if event.type == pygame.KEYDOWN:
# 查看按下按键对应的ascii码
print('按键按下', chr(event.key))
# 按键弹起
if event.type == pygame.KEYUP:
print('按键弹起')
示例1：
import pygame
import random
# 产生随机的RGB色
def rand_color():
return random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)
# 画球
def draw_ball(local, pos):
pygame.draw.circle(local, rand_color(), pos, random.randint(20, 50))
# 只要屏幕上的内容有更新，都要调用下面这两个方法中的一个
# pygame.display.flip()
pygame.display.update()
# 写一个函数，换一个按键
def draw_button(local, btn_color, title_color):
# 画个按键
# 矩形框
pygame.draw.rect(local, btn_color, (200, 150, 100, 50))
# 文字
font = pygame.font.SysFont('SimSun', 30)
title = font.render('click me', True, title_color)
screen.blit(title, (210, 165))
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_rect(point, rect):
x, y = point
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, 450))
screen.fill((255, 255, 255))
# 画个按键
# 矩形框
pygame.draw.rect(screen, (0, 255, 0), (200, 150, 100, 50))
# 文字
font = pygame.font.SysFont('SimSun', 30)
title = font.render('click me', True, (255, 0, 0))
screen.blit(title, (210, 165))
pygame.display.flip()
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit(0)
# 鼠标按下的事件
if event.type == pygame.MOUSEBUTTONDOWN:
# 判断鼠标是否在按键上
if is_in_rect(event.pos, (200, 150, 100, 50)):
# 当鼠标按下按键时画一个其他颜色的按键
draw_button(screen, rand_color(), rand_color())
# 当鼠标弹起时
if event.type == pygame.MOUSEBUTTONUP:
# 判断鼠标是否在按键上
if is_in_rect(event.pos, (200, 150, 100, 50)):
# 鼠标弹起时，画一个原来样式的按键
draw_button(screen, (0, 255, 0), (255, 0, 0))
# 鼠标移动时
if event.type == pygame.MOUSEMOTION:
screen.fill((255, 255, 255))
# 鼠标每移动一次就在指定的位置画一个按键
draw_button(screen, (0, 255, 0), (255, 0, 0))
# 鼠标每移动一次就在鼠标的位置画一个随机颜色的球
draw_ball(screen, event.pos)
mouse_event1.gif
示例2:鼠标拖拽图片移动
import pygame
# 写一个函数，判断一个点在某个范围内
def is_in_rect(point, rect):
x, y = point
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, 450))
screen.fill((255, 255, 255))
pygame.display.set_caption('图片拖拽')
image_x = 0
image_y = 0
image = pygame.image.load('./images/2.png')
screen.blit(image, (image_x, image_y))
# rect = (0, 0, 120, 56)
pygame.display.flip()
# 用来存储图片是否可以移动的状态
is_move = False
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit(0)
# 鼠标按下，让状态变为可以移动
if event.type == pygame.MOUSEBUTTONDOWN:
image_w, image_h = image.get_size()
is_move = is_in_rect(event.pos, (image_x, image_y, image_w, image_h))
# 鼠标弹起，状态变为不可移动
if event.type == pygame.MOUSEBUTTONUP:
# x, y = event.pos
# image_w, image_h = image.get_size()
# rect = (x - image_w/2, y - image_h/2, image_w, image_h)
is_move = False
if event.type == pygame.MOUSEMOTION:
if is_move:
screen.fill((255, 255, 255))
x, y = event.pos
image_w, image_h = image.get_size()
image_x = x - (image_w/2)
image_y = y - (image_h/2)
screen.blit(image, (image_x, image_y))
pygame.display.update()
mouse_event2.gif
示例3: pygame实现动画功能
"""
动画原理：不断刷新界面上的内容(一帧一帧的画)
"""
import pygame
import random
def static_page(screen):
"""
页面上的静态内容
:param screen: 画布
:return: None
"""
# 静态文字
font = pygame.font.SysFont('Times', 30)
title = font.render('hello pygame', True, (0, 150, 255))
screen.blit(title, (200, 200))
def animation_title(screen):
font = pygame.font.SysFont('Times', 30)
title = font.render('welcome', True, (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)))
screen.blit(title, (400, 300))
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 450))
screen.fill((255, 255, 255))
pygame.display.set_caption('pygame动画')
static_page(screen)
pygame.display.flip()
while True:
# for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(0)
# 在下面写每一帧要显示的内容
# delay,线程在这里阻塞指定的时间
pygame.time.delay(100)
# 动画前要将原来的内容全部清空
screen.fill((255, 255, 255))
static_page(screen)
animation_title(screen)
# 内容展示完成后，要更新到屏幕上
pygame.display.update()
animation.gif
示例4：在限定范围内移动且可以控制方向的小球
import pygame
def draw_ball(local, color, pos):
"""
画球
:param local:
:return:
"""
pygame.draw.circle(local, color, pos, 20)
# 方向对应的key值
up = 273
down = 274
left = 276
right = 275
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 450))
screen.fill((255, 255, 255))
pygame.display.set_caption('ball game')
pygame.display.flip()
# 保存初始坐标
ball_x = 100
ball_y = 100
x_speed = 10
y_speed = 0
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit(0)
if event.type == pygame.KEYDOWN:
if event.key == up:
y_speed = -10
x_speed = 0
elif event.key == down:
y_speed = 10
x_speed = 0
elif event.key == right:
x_speed = 10
y_speed = 0
elif event.key == left:
x_speed = -10
y_speed = 0
# 刷新屏幕
# 设置初始方向
ball_x += x_speed
ball_y += y_speed
# 边界检测
if ball_x + 20 >= 800:
ball_x = 800 - 20
x_speed *= -1
if ball_x <= 20:
ball_x = 20
x_speed *= -1
if ball_y + 20 >= 450:
ball_y = 450 - 20
y_speed *= -1
if ball_y <= 20:
ball_y = 20
y_speed *= -1
screen.fill((255, 255, 255))
pygame.time.delay(17)
draw_ball(screen, (255, 255, 0), (ball_x, ball_y))
pygame.display.update()
ball_game1.gif
示例5：多个移动的小球且鼠标每点击一次产生一个移动的小球
import pygame
import random
# random_color = (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
if __name__ == '__main__':
pygame.init()
screen = pygame.display.set_mode((800, 450))
screen.fill((255, 255, 255))
pygame.display.set_caption('bll game 2')
pygame.display.flip()
# all_balls中保存多个球
# 每个球要保存：半径、圆心坐标、颜色、x速度、y速度
all_balls = [
{
'r': random.randint(10,30),
'pos':(100, 100),
'color': (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)),
'x_speed': random.randint(-3, 3),
'y_speed': random.randint(-3, 3)
},
{
'r': random.randint(10, 30),
'pos': (200, 200),
'color': (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)),
'x_speed': random.randint(-3, 3),
'y_speed': random.randint(-3, 3)
},
{
'r': random.randint(10, 30),
'pos': (300, 300),
'color': (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)),
'x_speed': random.randint(-3, 3),
'y_speed': random.randint(-3, 3)
}
]
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit(0)
if event.type == pygame.MOUSEBUTTONDOWN:
ball_new = {
'r': random.randint(10, 30),
'pos': event.pos,
'color': (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)),
'x_speed': random.randint(-3, 3),
'y_speed': random.randint(-3, 3)
}
all_balls.append(ball_new)
# 刷新界面
screen.fill((255, 255, 255))
pygame.time.delay(10)
for ball in all_balls:
x, y = ball['pos']
x_speed = ball['x_speed']
y_speed = ball['y_speed']
x += x_speed
y += y_speed
# 边界检测
if x + ball['r'] >= 800:
ball['x_speed'] *= -1
if x <= ball['r']:
ball['x_speed'] *= -1
if y + ball['r'] >= 450:
ball['y_speed'] *= -1
if y <= ball['r']:
ball['y_speed'] *= -1
pygame.draw.circle(screen, ball['color'], (x,y), ball['r'])
# 更新球对应的坐标
ball['pos'] = x, y
pygame.display.update()
ball_game2.gif