With the python bindings for gtk, we have wrappers around the gtk objects
(widgets are objects). We don't want the gtk objects to be freed while we
still have a python reference to them, as this would cause problems and
probably also segfaults.
Now in order to have the same python object refer to a particular gtk
object all the time, the gtk object would need to hold a reference to it
(we don't want the python object to be freed while the gtk object is in
use). This forms a circular dependency, and would prevent objects from
being freed altogether.
To get around this, multiple python objects are used to refer to a single
gtk object. That is why you got a different python object back in the
selection. You can use the get_data and set_data methods to associate
data with a particular gtk object that will be accessible from all python
wrapper objects:
>>> list_item.set_data('my-key', [1,2,3])
>>> list_item.get_data('my-key')
[1, 2, 3]
This is what you should use.
James.
--
Email: [EMAIL PROTECTED]
WWW: http://www.daa.com.au/~james/
On Fri, 8 Oct 1999, Jozsa Kristof wrote:
> Hello,
>
> I'm new on the list so a short introduction goes here: I'm a newbie both
> in python and pygtk (means a few week experiences - I guess that counts as
> newbie ;), but programmed on several other languages including C/C++, Java,
> PHP3 and a bit Perl. I'm also studying IT in Hungary. /oh well, and sorry
> for my bad English sometimes/
>
> I've got confused around GtkList and GtkListItem-s 2 days before and
> seems I cannot figure out what I'm doing wrong. I've defined a GtkList and
> put it out to my GUI. I've filled it with a couple of GtkListItems, and
> stored the references for myself for future use. Later, when I query which
> item of the list is selected, I get an instance of a GtkListItem, which does
> not match with any of the stored instances.
>
> """See the code if that's not clear:
> self.dlbox = dlbox = GtkList()
> self.inbox = list_item = GtkListItem("INBOX")
> dlbox.add(list_item)
> list_item.show()
>
> # later, after selecting the item INBOX from the list visually
> selected = self.dlbox.get_selection()
> selected[0] == self.inbox # that's false
>
> The two instances when I print out refer to different memory addresses,
> and (no surprise after that), there's no such instance in my stored
> instances what's get_selection() returns.
>
> I guess I'm doing some trivial stupidity, but cant see what's it :(
> Can anyone help please?
>
> Christopher
>
> --
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> | Christopher Jozsa /V\ Veszprem Linux Users Group |
> | [EMAIL PROTECTED] /( )\ student of IT, Hungary |
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