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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():
# make menu button
Radiobutton_button = Menubutton(mBar, {'text': 'Political Party',
'underline': 0,
Pack: {'side': 'left',
'padx': '2m'}})
# the primary pulldown
Radiobutton_button.menu = Menu(Radiobutton_button)
Radiobutton_button.menu.add('radiobutton', {'label': 'Republican',
'variable' : party,
'value' : 1})
Radiobutton_button.menu.add('radiobutton', {'label': 'Democrat',
'variable' : party,
'value' : 2})
Radiobutton_button.menu.add('radiobutton', {'label': 'Libertarian',
'variable' : party,
'value' : 3})
party.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():
# make menu button
Radiobutton_button = Menubutton(mBar, {'text': 'Flavors',
'underline': 0,
Pack: {'side': 'left',
'padx': '2m'}})
# the primary pulldown
Radiobutton_button.menu = Menu(Radiobutton_button)
Radiobutton_button.menu.add('radiobutton', {'label': 'Strawberry',
'variable' : flavor,
'value' : 'Strawberry'})
Radiobutton_button.menu.add('radiobutton', {'label': 'Chocolate',
'variable' : flavor,
'value' : 'Chocolate'})
Radiobutton_button.menu.add('radiobutton', {'label': 'Rocky Road',
'variable' : flavor,
'value' : 'Rocky Road'})
# choose a default
flavor.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',
'bd': 2,
Pack: {'side': 'top',
'fill': 'x'}})
# make two application variables,
# one to control each radio button set
party = IntVar()
flavor = StringVar()
Radiobutton_button = makePoliticalParties()
Radiobutton_button2 = makeFlavors()
# 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",
"command" : printStuff,
"fg": "red"})
b.pack({"side" : "top"})
root.title('menu demo')
root.iconname('menu demo')
root.mainloop()
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