pong.py

import pyglet

WINDOW_WIDTH = 800
WINDOW_HEIGHT = 600

window = pyglet.window.Window(
    width=WINDOW_WIDTH, height=WINDOW_HEIGHT, caption="Pong!"
)

class Paddle:
    def __init__(self, width, height, y):
        self.width = width
        self.height = height
        self.y = y
        self.x = 0

    def position(self, mouse_x):
        x = mouse_x - self.width / 2
        x = max(x, 0)
        x = min(x, WINDOW_WIDTH - self.width)
        self.x = x

    def draw(self):
        pyglet.graphics.draw(4, pyglet.gl.GL_QUADS, ('v2f', [
            self.x, self.y,
            self.x + self.width, self.y,
            self.x + self.width, self.y + self.height,
            self.x, self.y + self.height,
        ]))

paddle = Paddle(width=100, height=10, y=10)

@window.event
def on_draw():
    window.clear()
    paddle.draw()

@window.event
def on_mouse_motion(x, y, d, dy):
    paddle.position(x)

if __name__ == '__main__':
    pyglet.app.run()