Paddle Object for a Pong Game on the SSaurel's Blog

Paddle.py

# Now, it is time to design the Paddle for our Pong Game
class Paddle:
    def __init__(self, canvas, topx, topy, width, height, boardheight):
        self.topx = topx
        self.topy = topy
        self.width = width
        self.height = height
        self.boardheight = boardheight
        self.score = 0
        self.canvas = canvas 
        # draw this paddle according positions passed in parameter
        self.id = self.canvas.create_rectangle(self.topx, self.topy, self.topx + self.width, self.topy + self.height, fill = 'white')
        
    # we update coords of this paddle
    def draw(self):
        self.canvas.coords(self.id, self.topx, self.topy, self.topx + self.width, self.topy + self.height)
        
    # now, we need to manage down event then top event for the current paddle object
    def top(self):
        if self.topy - VELOCITY > 0: 
            self.topy = self.topy - VELOCITY
            
    def down(self):
        if (self.topy + self.height + VELOCITY) < self.boardheight:
            self.topy = self.topy + VELOCITY
            
    # use both methods to collide paddle right or left. As an exercise, you can improve this to make one generic method ;)
    def collideright(self, ball):
        if (ball.topx + ball.width) >= self.topx and (ball.topy >= self.topy or (ball.topy + ball.width) >= self.topy) and ((ball.topy + ball.width) <= (self.topy + self.height) or ball.topy <= (self.topy + self.height)):
            return True 
        
        return False
    
    def collideleft(self, ball):
        if ball.topx <= (self.topx + self.width) and (ball.topy >= self.topy or (ball.topy + ball.width) >= self.topy) and ((ball.topy + ball.width) <= (self.topy + self.height) or ball.topy <= (self.topy + self.height)):
            return True 
        
        return False