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