Beginning Python - From Novice to Professional

538 CHAPTER 29 ■ PROJECT 10: DO-IT-YOURSELF ARCADE GAME
def __init__(self, speed):
SquishSprite.__init__(self, config.weight_image)
self.speed = speed
self.reset()
def reset(self):
"""
Move the weight to the top of the screen (just out of sight)
and place it at a random horizontal position.
"""
x = randrange(self.area.left, self.area.right)
self.rect.midbottom = x, 0
def update(self):
"""
Move the weight vertically (downwards) a distance
corresponding to its speed. Also set the landed attribute
according to whether it has reached the bottom of the screen.
"""
self.rect.top += self.speed
self.landed = self.rect.top >= self.area.bottom
class Banana(SquishSprite):
"""
A desperate banana. It uses the SquishSprite constructor to set up
its banana image, and will stay near the bottom of the screen,
with its horizontal position governed by the current mouse
position (within certain limits).
"""
def __init__(self):
SquishSprite.__init__(self, config.banana_image)
self.rect.bottom = self.area.bottom
# These paddings represent parts of the image where there is
# no banana. If a weight moves into these areas, it doesn't
# constitute a hit (or, rather, a squish):
self.pad_top = config.banana_pad_top
self.pad_side = config.banana_pad_side
def update(self):
"""
Set the Banana's center x-coordinate to the current mouse
x-coordinate, and then use the rect method clamp to ensure
that the Banana stays within its allowed range of motion.