l4/pkg/python/contrib/Demo/tkinter/matt/subclass-existing-widgets.py

   1 from Tkinter import *
   2
   3 # This is a program that makes a simple two button application
   4
   5
   6 class New_Button(Button):
   7     def callback(self):
   8         print self.counter
   9         self.counter = self.counter + 1
  10
  11 def createWidgets(top):
  12     f = Frame(top)
  13     f.pack()
  14     f.QUIT = Button(f, text='QUIT', foreground='red', command=top.quit)
  15
  16     f.QUIT.pack(side=LEFT, fill=BOTH)
  17
  18     # a hello button
  19     f.hi_there = New_Button(f, text='Hello')
  20     # we do this on a different line because we need to reference f.hi_there
  21     f.hi_there.config(command=f.hi_there.callback)
  22     f.hi_there.pack(side=LEFT)
  23     f.hi_there.counter = 43
  24
  25
  26 root = Tk()
  27 createWidgets(root)
  28 root.mainloop()