Re: Subclassing a Gtk2::TreeStore

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.

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