python开发_tkinter_获取单选菜单值 - Python

  1 from 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 __author__ = {'name' : 'Hongten',
 21               'mail' : 'hongtenzone@foxmail.com',
 22               'blog' : 'http://www.cnblogs.com/',
 23               'QQ': '648719819',
 24               'created' : '2013-09-11'}
 25 
 26 def makePoliticalParties(var):
 27     # make menu button
 28     Radiobutton_button = Menubutton(mBar, text='Political Party',
 29                                     underline=0)
 30     Radiobutton_button.pack(side=LEFT, padx='2m')
 31 
 32     # the primary pulldown
 33     Radiobutton_button.menu = Menu(Radiobutton_button)
 34 
 35     Radiobutton_button.menu.add_radiobutton(label='Republican',
 36                                             variable=var, value=1)
 37 
 38     Radiobutton_button.menu.add('radiobutton', {'label': 'Democrat',
 39                                                 'variable' : var,
 40                                                 'value' : 2})
 41 
 42     Radiobutton_button.menu.add('radiobutton', {'label': 'Libertarian',
 43                                                 'variable' : var,
 44                                                 'value' : 3})
 45 
 46     var.set(2)
 47 
 48     # set up a pointer from the file menubutton back to the file menu
 49     Radiobutton_button['menu'] = Radiobutton_button.menu
 50 
 51     return Radiobutton_button
 52 
 53 
 54 def makeFlavors(var):
 55     # make menu button
 56     Radiobutton_button = Menubutton(mBar, text='Flavors',
 57                                     underline=0)
 58     Radiobutton_button.pack(side=LEFT, padx='2m')
 59 
 60     # the primary pulldown
 61     Radiobutton_button.menu = Menu(Radiobutton_button)
 62 
 63     Radiobutton_button.menu.add_radiobutton(label='Strawberry',
 64                                             variable=var, value='Strawberry')
 65 
 66     Radiobutton_button.menu.add_radiobutton(label='Chocolate',
 67                                             variable=var, value='Chocolate')
 68 
 69     Radiobutton_button.menu.add_radiobutton(label='Rocky Road',
 70                                             variable=var, value='Rocky Road')
 71 
 72     # choose a default
 73     var.set("Chocolate")
 74 
 75     # set up a pointer from the file menubutton back to the file menu
 76     Radiobutton_button['menu'] = Radiobutton_button.menu
 77 
 78     return Radiobutton_button
 79 
 80 
 81 def printStuff():
 82     print("party is", party.get())
 83     print("flavor is", flavor.get())
 84     print()
 85 
 86 #################################################
 87 #### Main starts here ...
 88 root = Tk()
 89 
 90 
 91 # make a menu bar
 92 mBar = Frame(root, relief=RAISED, borderwidth=2)
 93 mBar.pack(fill=X)
 94 
 95 # make two application variables,
 96 # one to control each radio button set
 97 party = IntVar()
 98 flavor = StringVar()
 99 
100 Radiobutton_button = makePoliticalParties(party)
101 Radiobutton_button2 = makeFlavors(flavor)
102 
103 # finally, install the buttons in the menu bar.
104 # This allows for scanning from one menubutton to the next.
105 mBar.tk_menuBar(Radiobutton_button, Radiobutton_button2)
106 
107 b = Button(root, text="print party and flavor", foreground="red",
108            command=printStuff)
109 b.pack(side=TOP)
110 
111 root.title('menu demo')
112 root.iconname('menu demo')
113 
114 root.mainloop()

参考资料：

http://www.oschina.net/code/explore/Python-3.1.3/Demo/tkinter/matt/two-radio-groups.py


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