Matthew Dixon Cowles matt at mondoinfo.com
Sat Jun 29 22:55:22 EDT 2002

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On Sat, 29 Jun 2002 22:17:17 +0200, Mirko Koenig <koenig at v-i-t.de>
wrote:

>  for file in os.listdir( dir ):
>         Button( load_dlg_frame, text=file, relief=GROOVE, 
> 		command=load).pack()

> But how can i find out which button is pressed?  Or another
> question: How can i pass a event funktion more than 1 parameter (the
> event and other things).  I can't give any button a new event
> function, because it's dynamic, because of the number of files in
> the directory.

Dear Mirko,
For the callback function, give Tkinter an object that has a __call__
method. When you create the object, you can give it the filename and
its __call__ method can use the name when the button is clicked. Danny
Yoo has a recipe that does just that at:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66521

The general concept of giving a function some or all of its arguments
in advance of calling it is called "currying". There are other recipes
there that do the same thing in a more general way and other
information about its uses around the Net.

Regards,
Matt

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