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| 1 | +from Tkinter import * |
| 2 | +import string |
| 3 | + |
| 4 | +# This program shows how to use a simple type-in box |
| 5 | + |
| 6 | +class App(Frame): |
| 7 | + def __init__(self, master=None): |
| 8 | + Frame.__init__(self, master) |
| 9 | + self.pack() |
| 10 | + |
| 11 | + self.entrythingy = Entry() |
| 12 | + self.entrythingy.pack() |
| 13 | + |
| 14 | + # and here we get a callback when the user hits return. we could |
| 15 | + # make the key that triggers the callback anything we wanted to. |
| 16 | + # other typical options might be <Key-Tab> or <Key> (for anything) |
| 17 | + self.entrythingy.bind('<Key-Return>', self.print_contents) |
| 18 | + |
| 19 | + # Note that here is where we bind a completely different callback to |
| 20 | + # the same event. We pass "+" here to indicate that we wish to ADD |
| 21 | + # this callback to the list associated with this event type. Not specifying "+" would |
| 22 | + # simply override whatever callback was defined on this event. |
| 23 | + self.entrythingy.bind('<Key-Return>', self.print_something_else, "+") |
| 24 | + |
| 25 | + def print_contents(self, event): |
| 26 | + print "hi. contents of entry is now ---->", self.entrythingy.get() |
| 27 | + |
| 28 | + |
| 29 | + def print_something_else(self, event): |
| 30 | + print "hi. Now doing something completely different" |
| 31 | + |
| 32 | + |
| 33 | +root = App() |
| 34 | +root.master.title("Foo") |
| 35 | +root.mainloop() |
| 36 | + |
| 37 | + |
| 38 | + |
| 39 | +# secret tip for experts: if you pass *any* non-false value as |
| 40 | +# the third parameter to bind(), Tkinter.py will accumulate |
| 41 | +# callbacks instead of overwriting. I use "+" here because that's |
| 42 | +# the Tk notation for getting this sort of behavior. The perfect GUI |
| 43 | +# interface would use a less obscure notation. |
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