# L-30 MCS 260 Mon 5 Nov 2007 : guicheck.py
#
# Illustrates use of Checkbutton.

from Tkinter import *
top = Tk()
top.title("use Checkbutton")
H = IntVar() # determined by hot button
C = IntVar() # determined by cold button

hot = Checkbutton(top,text="hot",\
  variable = H,onvalue = 1,offvalue = 0)
hot.grid(row=0,column=0)

cold = Checkbutton(top,text="cold",\
  variable = C,onvalue = 1,offvalue = 0)
cold.grid(row=0,column=1)

e = Entry(top)
e.grid(row=2,columnspan=2)

def act():
   "callback function for enter button"
   e.delete(0,END)
   if H.get() == 1 and C.get() == 0: 
      e.insert(INSERT,"it is hot")
   if H.get() == 0 and C.get() == 1: 
      e.insert(INSERT,"it is cold")
   if H.get() == 1 and C.get() == 1: 
      e.insert(INSERT,"it is hot and cold")

b = Button(top,text = "enter",command=act)
b.grid(row=1,columnspan=2,sticky=W+E+N+S)

top.mainloop()