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',
  15                             'fg': 'red',
  16                             'command': top.quit})
  17
  18     f.QUIT.pack({'side': 'left', 'fill': 'both'})
  19
  20
  21     # a hello button
  22     f.hi_there = New_Button(f, {'text': 'Hello'})
  23     # we do this on a different line because we need to reference f.hi_there
  24     f.hi_there.config({'command' : f.hi_there.callback})
  25     f.hi_there.pack({'side': 'left'})
  26     f.hi_there.counter = 43
  27
  28
  29
  30 root = Tk()
  31 createWidgets(root)
  32 root.mainloop()
  33