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Editing: two-radio-groups.py
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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