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import sys
from os.path import dirname, join
import pygame
from reactivex import operators as ops
from reactivex.scheduler.mainloop import PyGameScheduler
from reactivex.subject import Subject
# FORMAT = '%(asctime)-15s %(threadName)s %(message)s'
# logging.basicConfig(format=FORMAT, level=logging.DEBUG)
# log = logging.getLogger('Rx')
def main():
pygame.init()
size = 500, 500
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Rx for Python rocks")
black = 0, 0, 0
background = pygame.Surface(screen.get_size())
background.fill(black) # fill the background black
background = background.convert() # prepare for faster blitting
scheduler = PyGameScheduler(pygame)
mousemove = Subject()
color = "white"
base = dirname(__file__)
files = [
join(base, img % color)
for img in [
"chess_rook_%s.png",
"chess_knight_%s.png",
"chess_bishop_%s.png",
"chess_king_%s.png",
"chess_queen_%s.png",
"chess_bishop_%s.png",
"chess_knight_%s.png",
"chess_rook_%s.png",
]
]
images = [pygame.image.load(image).convert_alpha() for image in files]
old = [None] * len(images)
draw = []
erase = []
def handle_image(i, image):
imagerect = image.get_rect()
def on_next(ev):
imagerect.top = ev[1]
imagerect.left = ev[0] + i * 32
if old[i]:
erase.append(old[i])
old[i] = imagerect.copy()
draw.append((image, imagerect.copy()))
def on_error(err):
print("Got error: %s" % err)
sys.exit()
mousemove.pipe(ops.delay(0.1 * i, scheduler=scheduler)).subscribe(
on_next, on_error=on_error
)
for i, image in enumerate(images):
handle_image(i, image)
while True:
for event in pygame.event.get():
if event.type == pygame.MOUSEMOTION:
pos = event.pos
mousemove.on_next(pos)
elif event.type == pygame.QUIT:
sys.exit()
if len(draw):
update = []
for rect in erase:
screen.blit(background, (rect.x, rect.y), rect)
update.append(rect)
for image, rect in draw:
screen.blit(image, rect)
update.append(rect)
pygame.display.update(update)
pygame.display.flip()
draw = []
erase = []
scheduler.run()
if __name__ == "__main__":
main()
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