mouse input with pyglet

mouse.py

import sys
from math import *
from pyglet.gl import *

window = pyglet.window.Window()

class Circle:
    def __init__(self,radius,r,g,b,x=0,y=0):
        self.r = r
        self.g = g
        self.b = b
        self.x = x
        self.y = y
        self.size = 1
        verts = [0,0]
        for angle in range(0,370,10):
            x = radius * cos(radians(angle))
            y = radius * sin(radians(angle))
            verts = verts + [x,y]
        self.vlist = pyglet.graphics.vertex_list(len(verts)/2, ('v2f',verts))
    def draw(self):
        glColor3f(self.r,self.g,self.b)
        glPushMatrix()
        glTranslatef(self.x, self.y ,0)
        glScalef(self.size, self.size, self.size)
        self.vlist.draw(GL_TRIANGLE_FAN)
        glPopMatrix()


c = Circle(50,1,0,0,300,300)
info = pyglet.text.Label('Mouse: ',x=5,y=5)

@window.event
def on_draw():
    global c, info
    glClear(GL_COLOR_BUFFER_BIT)
    c.draw()
    info.draw()

@window.event
def on_mouse_motion(x,y,dx,dy):
    global c, info
    c.x = x
    c.y = y
    info.text = 'Mouse: %d %d   %d %d' % (x,y,dx,dy)

@window.event
def on_mouse_press(x,y,button,modifiers):
    global c
    if button == pyglet.window.mouse.LEFT:
        c.size = c.size * 0.9
    elif button == pyglet.window.mouse.RIGHT:
        c.size = c.size * 1.1

pyglet.app.run()