Question

我有两个列表，每个列表包含3个rects。我可以分配给每个列表中的selected1和selected2 3个变量并分别上下移动这两行rects，同时保持它们之间的间隙吗？我是初学者，不知道这样构造的代码是否可以处理这个任务。

import pygame

# === CONSTANS ===
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
blue = (0, 0, 255)
green = (0, 102, 0)
yellow = (255, 204, 0)
grid_color = (224, 224, 224)

width = 1200
height = 720

k = 10

screen = pygame.display.set_mode((width, height))
screen_rect = screen.get_rect()

# --- objects ---

G_x = 10  # stripe width
x = 2

stripes_x1 = []
stripes_x2 = []

G1_pos_x = 122
G2_pos_x = 367
G1_pos_y = 0
G2_pos_y = 0

G1_y = 60*x
G2_y = 75*x

G1_start = G1_pos_y + height - G1_y
G2_start = G2_pos_y + height - G2_y

a = 166
b = 222
for x in range(3):
    gap = a*x
    gap2 = b*x
    stripes_x1.append(pygame.Rect(G1_pos_x, (G1_start - 6*k) - gap, G_x, G1_y))
    stripes_x2.append(pygame.Rect(G2_pos_x, (G2_start - 6*k) - gap2, G_x, G2_y))

selected1 = None
selected2 = None

# --- mainloop ---

clock = pygame.time.Clock()
is_running = True

while is_running:

    for event in pygame.event.get():

        # --- global events ---

        if event.type == pygame.QUIT:
            is_running = False

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                is_running = False

        if event.type == pygame.MOUSEBUTTONDOWN:
            if event.button == 1:
                for i, r in enumerate(stripes_x1):
                    if r.collidepoint(event.pos):
                        selected1 = i
                        selected_offset_y = r.y - event.pos[1]
        if event.type == pygame.MOUSEMOTION:
            if selected1 is not None:  # selected can be `0` so `is not None` is required
                stripes_x1[selected1].y = event.pos[1] + selected_offset_y

        if event.type == pygame.MOUSEBUTTONUP:
            if event.button == 1:
                selected1 = None

        if event.type == pygame.MOUSEBUTTONDOWN:
            if event.button == 1:
                for j, r in enumerate(stripes_x2):
                     if r.collidepoint(event.pos):
                        selected2 = j
                        selected_offset_y = r.y - event.pos[1]
        if event.type == pygame.MOUSEMOTION:
            if selected2 is not None:  # selected can be `0` so `is not None` is required
                stripes_x2[selected2].y = event.pos[1] + selected_offset_y

        if event.type == pygame.MOUSEBUTTONUP:
            if event.button == 1:
                selected2 = None

        # --- objects events ---

        '''
       button.handle_event(event)
       '''
    # --- updates ---
        # empty
    # --- draws ---

    screen.fill(white)
    for i in range(width):
        grid_x = k * i
        grid_y = k * i

        pygame.draw.line(screen, grid_color, (grid_x, 0), (grid_x, height), 1)
        pygame.draw.line(screen, grid_color, (0, grid_y), (width, grid_y), 1)
        pygame.draw.line(screen, black, (6 * k, height - 6 * k), (width - 6 * k, height - 6 * k), 3)
        pygame.draw.line(screen, black, (6 * k, height - 6 * k), (6 * k, 0 * k), 3)
    # draw rect
    for r in stripes_x1:
        pygame.draw.rect(screen, green, r)
    for s in stripes_x2:
        pygame.draw.rect(screen, green, s)


    pygame.display.update()

    clock.tick(60)
pygame.quit()

Answer 1

要同时移动rects，可以将它们放在一个列表中，如果选择了一个rect，则可以借助MOUSEMOTION事件的rel属性（最后一个鼠标的相对位置）将它们全部移动事件）。这是一个最小的例子：

import sys
import pygame as pg


BLACK = pg.Color('black')
RECT_COLOR = pg.Color(78, 140, 200)


def main():
    screen = pg.display.set_mode((640, 480))
    clock = pg.time.Clock()
    rect_list = [pg.Rect(100, 100+y, 20, 80) for y in range(0, 241, 120)]
    selected = False
    done = False

    while not done:
        for event in pg.event.get():
            if event.type == pg.QUIT:
                done = True
            elif event.type == pg.MOUSEBUTTONDOWN:
                for rect in rect_list:
                    if rect.collidepoint(event.pos):
                        selected = True
            elif event.type == pg.MOUSEBUTTONUP:
                selected = False
            elif event.type == pg.MOUSEMOTION:
                if selected:
                    for rect in rect_list:
                        rect.y += event.rel[1]

        screen.fill(BLACK)
        for rect in rect_list:
            pg.draw.rect(screen, RECT_COLOR, rect)

        pg.display.flip()
        clock.tick(30)


if __name__ == '__main__':
    pg.init()
    main()
    pg.quit()
    sys.exit()

通过单击其中一个来移动多个rects

1 个答案: