Question

屏幕两侧有两种颜色。我希望能够使用左箭头选择屏幕的左半部分，然后使用向上和向下箭头操作颜色，直到满意为止。

然而，我目前的代码不起作用。问题似乎是需要一系列关键命令，即左箭头，然后向上和向下操作颜色。

red = (100, 0, 0)
green = (0, 100, 0)
display_width = 800
display_height = 600
dw2 = display_width/2
calibration_exit = False

while not calibration_exit:

        pygame.event.pump()
        pygame.draw.rect( screen,  red,   [  0   , 0, dw2, display_height ] )
        pygame.draw.rect( screen,  green, [ dw2  , 0, dw2, display_height ] )
        pygame.display.update()

        # Get Keys #
        keys = pygame.key.get_pressed()

        if keys[K_LEFT]:

            while not keys[K_RIGHT]:

                keys = pygame.key.get_pressed()

                if keys[K_UP]:
                    red = list(red)
                    red[0] += 10
                    red = tuple(red)
                    pygame.draw.rect( screen,  red,   [  0   , 0, dw2, display_height ] )
                    pygame.display.update()


                if keys[K_DOWN]:
                    red = list(red)
                    red[0] -= 10
                    red = tuple(red)
                    pygame.draw.rect( screen,  red,   [  0   , 0, dw2, display_height ] )
                    pygame.display.update()

Answer 1

可以把它想象成每帧只能召唤一次pygame.key.get_pressed()，每帧就召唤一次pygame.display.update()等等。如果那么逻辑，你就不能做你的标准，因为你开始＆＃39;每次都在while循环的根。这意味着您必须单独跟踪您的州。类似的东西：

calibration_exit = False
selected = None
while not calibration_exit:
    pygame.event.pump()
    pygame.draw.rect( screen,  red,   [  0   , 0, dw2, display_height ] )
    pygame.draw.rect( screen,  green, [ dw2  , 0, dw2, display_height ] )
    pygame.display.update()

    keys = pygame.key.get_pressed()
    if keys[K_LEFT]:
        selected = "left"
    if keys[K_RIGHT]:
        selected = "right"

    if selected == "left":
        if keys[K_UP]:
            # modify 'left' by going up
        if keys[K_DOWN]:
            # modify 'left' by going down
    elif selected == "right":
        if keys[K_UP]:
            # modify 'right' by going up
        if keys[K_DOWN]:
            # modify 'right' by going down

pygame中的分层按键

1 个答案: