1 from Tkinter import *

     2 

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

     4 # subclassing.

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

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

     7 

     8 

     9 class Test(Frame):

    10     def printit(self):

    11         print "hi"

    12 

    13     def createWidgets(self):

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

    15                            command=self.quit)

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

    17 

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

    19 

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

    21 

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

    23 

    24         # all of these work..

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

    26         self.draw.pack(side=LEFT)

    27 

    28     def moveThing(self, *args):

    29         velocity = self.speed.get()

    30         str = float(velocity) / 1000.0

    31         str = "%ri" % (str,)

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

    33         self.after(10, self.moveThing)

    34 

    35     def __init__(self, master=None):

    36         Frame.__init__(self, master)

    37         Pack.config(self)

    38         self.createWidgets()

    39         self.after(10, self.moveThing)

    40 

    41 

    42 test = Test()

    43 

    44 test.mainloop()