您如何将鼠标指针置于使其成为十字准线

Question

我在GIMP上为游戏制作了一个自定义光标，我希望将鼠标集中在光标上。因此，普通箭头指针的尖端位于十字路口的中心。

有什么想法？

我已经隐藏了另一个光标并显示了新的光标，我只想将其集中。

Answer 1

为光标创建一个pygame.Rect，当发生pygame.MOUSEMOTION事件时，将其center坐标设置为鼠标位置，并在RECT处爆炸光标图像。

import pygame as pg
pg.init()
screen = pg.display.set_mode((640, 480))
clock = pg.time.Clock()
# pg.mouse.set_visible(False)
BG_COLOR = pg.Color('gray12')
CURSOR_IMG = pg.Surface((40, 40), pg.SRCALPHA)
pg.draw.circle(CURSOR_IMG, pg.Color('white'), (20, 20), 20, 2)
pg.draw.circle(CURSOR_IMG, pg.Color('white'), (20, 20), 2)
# Create a rect which we'll use as the blit position of the cursor.
cursor_rect = CURSOR_IMG.get_rect()
done = False
while not done:
    for event in pg.event.get():
        if event.type == pg.QUIT:
            done = True
        elif event.type == pg.MOUSEMOTION:
            # If the mouse is moved, set the center of the rect
            # to the mouse pos. You can also use pygame.mouse.get_pos()
            # if you're not in the event loop.
            cursor_rect.center = event.pos
    screen.fill(BG_COLOR)
    # Blit the image at the rect's topleft coords.
    screen.blit(CURSOR_IMG, cursor_rect)
    pg.display.flip()
    clock.tick(30)
pg.quit()

Answer 2

您应该首先在表面周围绘制一个矩形，并将矩形中心放在鼠标的位置，最后闪烁矩形上的表面

elif event.type == pg.MOUSEMOTION:
    cursor_rect = CURSOR_IMG.get_rect(center = event.pos)

这应该有效