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/Demo/tkinter/matt/two-radio-groups.py

http://unladen-swallow.googlecode.com/
Python | 110 lines | 49 code | 31 blank | 30 comment | 0 complexity | 46730b400c7764804fb16d1b5585837c MD5 | raw file
  1from Tkinter import *
  2
  3#       The way to think about this is that each radio button menu
  4#       controls a different variable -- clicking on one of the
  5#       mutually exclusive choices in a radiobutton assigns some value
  6#       to an application variable you provide. When you define a
  7#       radiobutton menu choice, you have the option of specifying the
  8#       name of a varaible and value to assign to that variable when
  9#       that choice is selected. This clever mechanism relieves you,
 10#       the programmer, from having to write a dumb callback that
 11#       probably wouldn't have done anything more than an assignment
 12#       anyway. The Tkinter options for this follow their Tk
 13#       counterparts:
 14#       {"variable" : my_flavor_variable, "value" : "strawberry"}
 15#       where my_flavor_variable is an instance of one of the
 16#       subclasses of Variable, provided in Tkinter.py (there is
 17#       StringVar(), IntVar(), DoubleVar() and BooleanVar() to choose
 18#       from)
 19
 20
 21
 22def makePoliticalParties(var):
 23    # make menu button
 24    Radiobutton_button = Menubutton(mBar, text='Political Party',
 25                                    underline=0)
 26    Radiobutton_button.pack(side=LEFT, padx='2m')
 27
 28    # the primary pulldown
 29    Radiobutton_button.menu = Menu(Radiobutton_button)
 30
 31    Radiobutton_button.menu.add_radiobutton(label='Republican',
 32                                            variable=var, value=1)
 33
 34    Radiobutton_button.menu.add('radiobutton', {'label': 'Democrat',
 35                                                'variable' : var,
 36                                                'value' : 2})
 37
 38    Radiobutton_button.menu.add('radiobutton', {'label': 'Libertarian',
 39                                                'variable' : var,
 40                                                'value' : 3})
 41
 42    var.set(2)
 43
 44    # set up a pointer from the file menubutton back to the file menu
 45    Radiobutton_button['menu'] = Radiobutton_button.menu
 46
 47    return Radiobutton_button
 48
 49
 50def makeFlavors(var):
 51    # make menu button
 52    Radiobutton_button = Menubutton(mBar, text='Flavors',
 53                                    underline=0)
 54    Radiobutton_button.pack(side=LEFT, padx='2m')
 55
 56    # the primary pulldown
 57    Radiobutton_button.menu = Menu(Radiobutton_button)
 58
 59    Radiobutton_button.menu.add_radiobutton(label='Strawberry',
 60                                            variable=var, value='Strawberry')
 61
 62    Radiobutton_button.menu.add_radiobutton(label='Chocolate',
 63                                            variable=var, value='Chocolate')
 64
 65    Radiobutton_button.menu.add_radiobutton(label='Rocky Road',
 66                                            variable=var, value='Rocky Road')
 67
 68    # choose a default
 69    var.set("Chocolate")
 70
 71    # set up a pointer from the file menubutton back to the file menu
 72    Radiobutton_button['menu'] = Radiobutton_button.menu
 73
 74    return Radiobutton_button
 75
 76
 77def printStuff():
 78    print "party is", party.get()
 79    print "flavor is", flavor.get()
 80    print
 81
 82#################################################
 83#### Main starts here ...
 84root = Tk()
 85
 86
 87# make a menu bar
 88mBar = Frame(root, relief=RAISED, borderwidth=2)
 89mBar.pack(fill=X)
 90
 91# make two application variables,
 92# one to control each radio button set
 93party = IntVar()
 94flavor = StringVar()
 95
 96Radiobutton_button = makePoliticalParties(party)
 97Radiobutton_button2 = makeFlavors(flavor)
 98
 99# finally, install the buttons in the menu bar.
100# This allows for scanning from one menubutton to the next.
101mBar.tk_menuBar(Radiobutton_button, Radiobutton_button2)
102
103b = Button(root, text="print party and flavor", foreground="red",
104           command=printStuff)
105b.pack(side=TOP)
106
107root.title('menu demo')
108root.iconname('menu demo')
109
110root.mainloop()