# L-30 MCS 260 Mon 5 Nov 2007 : guiradio.py
#
# Use of Radiobutton to do +1 or -1.

from Tkinter import *
top = Tk()
top.title("use Radiobutton")
text = Entry(top)
text.insert(INSERT,"0")  # initialization
text.grid(row=0,columnspan=2)

def plus():
   "Callback function, does +1"
   s = text.get()        # data in Entry
   s = str(int(s) + 1)   # add one to it
   text.delete(0,END)    # clear Entry
   text.insert(INSERT,s) # insert result
def minus():
   "Callback function does -1"
   s = text.get()
   s = str(int(s) - 1)
   text.delete(0,END)
   text.insert(INSERT,s)

add = Radiobutton(top,text="+1",\
   command=plus)
add.grid(row=1,column=0)
sub = Radiobutton(top,text="-1",\
   command=minus)
sub.grid(row=1,column=1)

top.mainloop()