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110 lines
3.7 KiB
Python
110 lines
3.7 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(var):
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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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Radiobutton_button.pack(side=LEFT, 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=var, value=1)
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Radiobutton_button.menu.add('radiobutton', {'label': 'Democrat',
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'variable' : var,
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'value' : 2})
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Radiobutton_button.menu.add('radiobutton', {'label': 'Libertarian',
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'variable' : var,
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'value' : 3})
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var.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(var):
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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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Radiobutton_button.pack(side=LEFT, 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=var, value='Strawberry')
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Radiobutton_button.menu.add_radiobutton(label='Chocolate',
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variable=var, value='Chocolate')
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Radiobutton_button.menu.add_radiobutton(label='Rocky Road',
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variable=var, value='Rocky Road')
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# choose a default
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var.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, borderwidth=2)
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mBar.pack(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(party)
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Radiobutton_button2 = makeFlavors(flavor)
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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", foreground="red",
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command=printStuff)
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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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