from tkinter import *
# The way to think about this is that each radio button menu
# controls a different variable -- clicking on one of the
# mutually exclusive choices in a radiobutton assigns some value
# to an application variable you provide. When you define a
# radiobutton menu choice, you have the option of specifying the
# name of a varaible and value to assign to that variable when
# that choice is selected. This clever mechanism relieves you,
# the programmer, from having to write a dumb callback that
# probably wouldn't have done anything more than an assignment
# anyway. The Tkinter options for this follow their Tk
# counterparts:
# {"variable" : my_flavor_variable, "value" : "strawberry"}
# where my_flavor_variable is an instance of one of the
# subclasses of Variable, provided in Tkinter.py (there is
# StringVar(), IntVar(), DoubleVar() and BooleanVar() to choose
# from)
def makePoliticalParties(var):
# make menu button
Radiobutton_button = Menubutton(mBar, text='Political Party',
underline=0)
Radiobutton_button.pack(side=LEFT, padx='2m')
# the primary pulldown
Radiobutton_button.menu = Menu(Radiobutton_button)
Radiobutton_button.menu.add_radiobutton(label='Republican',
variable=var, value=1)
Radiobutton_button.menu.add('radiobutton', {'label': 'Democrat',
'variable' : var,
'value' : 2})
Radiobutton_button.menu.add('radiobutton', {'label': 'Libertarian',
'variable' : var,
'value' : 3})
var.set(2)
# set up a pointer from the file menubutton back to the file menu
Radiobutton_button['menu'] = Radiobutton_button.menu
return Radiobutton_button
def makeFlavors(var):
# make menu button
Radiobutton_button = Menubutton(mBar, text='Flavors',
underline=0)
Radiobutton_button.pack(side=LEFT, padx='2m')
# the primary pulldown
Radiobutton_button.menu = Menu(Radiobutton_button)
Radiobutton_button.menu.add_radiobutton(label='Strawberry',
variable=var, value='Strawberry')
Radiobutton_button.menu.add_radiobutton(label='Chocolate',
variable=var, value='Chocolate')
Radiobutton_button.menu.add_radiobutton(label='Rocky Road',
variable=var, value='Rocky Road')
# choose a default
var.set("Chocolate")
# set up a pointer from the file menubutton back to the file menu
Radiobutton_button['menu'] = Radiobutton_button.menu
return Radiobutton_button
def printStuff():
print("party is", party.get())
print("flavor is", flavor.get())
print()
#################################################
#### Main starts here ...
root = Tk()
# make a menu bar
mBar = Frame(root, relief=RAISED, borderwidth=2)
mBar.pack(fill=X)
# make two application variables,
# one to control each radio button set
party = IntVar()
flavor = StringVar()
Radiobutton_button = makePoliticalParties(party)
Radiobutton_button2 = makeFlavors(flavor)
# finally, install the buttons in the menu bar.
# This allows for scanning from one menubutton to the next.
mBar.tk_menuBar(Radiobutton_button, Radiobutton_button2)
b = Button(root, text="print party and flavor", foreground="red",
command=printStuff)
b.pack(side=TOP)
root.title('menu demo')
root.iconname('menu demo')
root.mainloop()
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