diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/matt/entry-with-shared-variable.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/matt/entry-with-shared-variable.py Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,46 @@ +from Tkinter import * +import string + +# This program shows how to make a typein box shadow a program variable. + +class App(Frame): + def __init__(self, master=None): + Frame.__init__(self, master) + self.pack() + + self.entrythingy = Entry(self) + self.entrythingy.pack() + + self.button = Button(self, text="Uppercase The Entry", + command=self.upper) + self.button.pack() + + # here we have the text in the entry widget tied to a variable. + # changes in the variable are echoed in the widget and vice versa. + # Very handy. + # there are other Variable types. See Tkinter.py for all + # the other variable types that can be shadowed + self.contents = StringVar() + self.contents.set("this is a variable") + self.entrythingy.config(textvariable=self.contents) + + # and here we get a callback when the user hits return. we could + # make the key that triggers the callback anything we wanted to. + # other typical options might be or (for anything) + self.entrythingy.bind('', self.print_contents) + + def upper(self): + # notice here, we don't actually refer to the entry box. + # we just operate on the string variable and we + # because it's being looked at by the entry widget, changing + # the variable changes the entry widget display automatically. + # the strange get/set operators are clunky, true... + str = string.upper(self.contents.get()) + self.contents.set(str) + + def print_contents(self, event): + print "hi. contents of entry is now ---->", self.contents.get() + +root = App() +root.master.title("Foo") +root.mainloop()