from Tkinter import *

# this is the same as simple-demo-1.py, but uses

# subclassing.

# note that there is no explicit call to start Tk.

# Tkinter is smart enough to start the system if it's not already going.

class Test(Frame):

    def printit(self):

        print "hi"

    def createWidgets(self):

        self.QUIT = Button(self, text='QUIT', foreground='red',

                           command=self.quit)

        self.QUIT.pack(side=BOTTOM, fill=BOTH)

        self.draw = Canvas(self, width="5i", height="5i")

        self.speed = Scale(self, orient=HORIZONTAL, from_=-100, to=100)

        self.speed.pack(side=BOTTOM, fill=X)

        # all of these work..

        self.draw.create_rectangle(0, 0, 10, 10, tags="thing", fill="blue")

        self.draw.pack(side=LEFT)

    def moveThing(self, *args):

        velocity = self.speed.get()

        str = float(velocity) / 1000.0

        str = "%ri" % (str,)

        self.draw.move("thing",  str, str)

        self.after(10, self.moveThing)

    def __init__(self, master=None):

        Frame.__init__(self, master)

        Pack.config(self)

        self.createWidgets()

        self.after(10, self.moveThing)

test = Test()

test.mainloop()