pygame的鼠标事件

两个实例：

import pygame
import random
# 随机颜色
def rand_color():
    return (random.randint(0,255),
            random.randint(0,255),
            random.randint(0,255))
# 画圆
def draw_circle(screen,pos):
    pygame.draw.circle(screen,
                       rand_color(),
                       event.pos,
                       random.randint(10, 40))
# 判断点击范围
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
# 画一个按钮
def draw_button(screen,b_color,t_color):
    pygame.draw.rect(screen, b_color, (125, 125, 90, 40))
    font = pygame.font.SysFont('Times', 30)
    button = font.render('clicke', True, t_color)
    screen.blit(button,(135,125))
    return button
if __name__ == '__main__':
    pygame.init()
    screen = pygame.display.set_mode((500,500))
    screen.fill((255,255,255))
    # 设置窗口标题
    pygame.display.set_caption('鼠标事件')
    while True:
        rect = (125, 125, 90, 40)
        # draw_button(screen,(0,255,0),(255,0,0))
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                exit()
            # 判断鼠标点击的位置是否在框内，在画一个按钮
            if event.type == pygame.MOUSEBUTTONDOWN:
                # draw_circle(screen,event.pos)
                if is_in_rect(event.pos,rect):
                    draw_button(screen, (255, 0, 0), (0, 255, 0))
                    pygame.display.flip()
            # 鼠标弹起返回按钮原先的状态
            if event.type == pygame.MOUSEBUTTONUP:
                draw_button(screen, (0, 255, 0), (255, 0, 0))
                pygame.display.flip()
            # 鼠标移动带圆
            if event.type == pygame.MOUSEMOTION:
                screen.fill((255,255,255))
                draw_button(screen, (0, 255, 0), (255, 0, 0))
                draw_circle(screen,event.pos)
                pygame.display.flip()

image.png

# 要求：先在屏幕上显示一张图片，当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
# 判断点在某个范围内
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((500,500))
    screen.fill((255,255,255))
    # 设置窗口标题
    pygame.display.set_caption('鼠标事件2')
    image = pygame.image.load('hero1.png')
    screen.blit(image,(125,125))
    iw,ih = image.get_size()
    rect = (125, 125, iw, ih)
    pygame.display.flip()
    # 移动状态
    flag = False
    while True:
        # draw_button(screen,(0,255,0),(255,0,0))
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                exit()
            # 按下可动
            if event.type == pygame.MOUSEBUTTONDOWN:
                if is_in_rect(event.pos,rect):
                    flag = True
            # 弹起不可动
            if event.type == pygame.MOUSEBUTTONUP:
                flag = False
            # 画图片
            if event.type == pygame.MOUSEMOTION:
                x,y = event.pos
                if flag:
                    screen.fill((255,255,255))
                    screen.blit(image,(x-iw/2,y-ih/2))
                    rect = (x-iw/2,y-ih/2,iw,ih)
                    pygame.display.flip()

image.png