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. 22 # Not specifying "+" would simply override whatever callback was 23 # defined on this event. 24 self.entrythingy.bind('<Key-Return>', self.print_something_else, "+") 25 26 def print_contents(self, event): 27 print "hi. contents of entry is now ---->", self.entrythingy.get() 28 29 30 def print_something_else(self, event): 31 print "hi. Now doing something completely different" 32 33 34 root = App() 35 root.master.title("Foo") 36 root.mainloop() 37 38 39 40 # secret tip for experts: if you pass *any* non-false value as 41 # the third parameter to bind(), Tkinter.py will accumulate 42 # callbacks instead of overwriting. I use "+" here because that's 43 # the Tk notation for getting this sort of behavior. The perfect GUI 44 # interface would use a less obscure notation. 45
