Re: Subclassing a Gtk2::TreeStore

[muppet <scott asofyet org>]

On Oct 26, 2007, at 6:37 AM, Torsten Schoenfeld wrote:

> On Fri, 2007-10-26 at 17:22 +0100, Dave Howorth wrote:
>
> > My [non-working] code looks like this:
>
> Note how drag_data_received is overridden simply how you'd override  
> any
> other method in normal Perl code, and how the parent's
> drag_data_received is invoked.

To be a little more explicit, this works because where you need it to  
be overridden is in your own code, where perl's method lookup can  
work normally.

Trying to override drag_data_received as a signal won't work, because  
it's not a signal.

I think the root of the problem you were seeing, Dave, is that  
drag_data_received comes from a GInterface, and as such is not  
actually a virtual method that may be overridden by a class deriving  
from the class implementing the interface.  You can't add the  
interface in your own class, because the base class already  
implements it.

So, Torsten's solution effectively creates a wrapper function -- your  
perl code first calls a wrapper instead of the real thing, and then  
chains up to the real thing.

--
elysse:  You dance better than some.
me:  "Some" what?
elysse:  Some asparagus.