Fwd: [E-devel] Important change in python elementary

Vaudano Luca vaudano at gmail.com
Mon Nov 23 09:30:37 CET 2009

Hi guys,
I think that it's a good thing forward the following email here!


---------- Forwarded message ----------
From: Boris 'billiob' Faure <billiob at gmail.com>
Date: Sun, Nov 22, 2009 at 10:28 PM
Subject: [E-devel] Important change in python elementary
To: enlightenment-devel at lists.sourceforge.net

I've committed some changes to how callbacks are handled in python elementary.
If you use it, your application is now broken, I'm sorry. However,
it's better now than letter :)

So, what have changed?
You used to bind a callback to the "clicked" of a button this way:
bt.clicked = my_func
bt.clicked = (my_func, my_data)

The signature of the callback was always: my_func(obj, event, data)
even if you had not set any data!
What if you wanted to perform 2 actions? How could you remove the callback?

Now, in order to connect a function to an event, let say 'clicked', you use:
bt.callback_clicked_add(func, *args, **kwargs)

The required signature is my_func(obj, *args, **kwargs) or
my_func(obj, it, *args, **kwargs) if an item is given, for example
when an item in a toolbar is clicked.

If you want to disconnect this function to the event, you call:
bt.callback_clicked_remove(func, *args, **kwargs)
if func is None, all the events bound to 'clicked' are removed.
args and kwargs must be the same as those given when the callback was set.

Now, this is possible:
def destroy(win, str1, str2, str3, str4):
   print :str1='%s', str2='%s', str3='%s', str4='%s'" %(
       str1, str2, str3, str4)

win.callback_destroy_add(destroy, "test1", "test2", str3="test3", str4="test4")

To sum up:
when you used:
now you should use:

I've updated the testing file. I hope to have patched correctly editje.
Boris 'billiob' Faure

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