Re: two or more objects into a signal handler

[Markus Lausser <sgop users sourceforge net>]

On Sat, Feb 10, 2001 at 07:36:46PM +0100 Gonzalo Aguilar wrote:

> How can I pass two objects to a signal?
>
>
> I'm trying to make a button unclickable if a entry text box is empty, so
> I use the change event on the entry box to
> check if the entry box is empty and if so, then I make the button
> unclickable...
>
> But then I need the entry box and the button in the signal handler, but
> I only can pass one argument...
> The entry box to check if it's empty, and the button to make it
> unclickable...
>
> How can I make this operation?
>
> Should I use a structure to pass the pointers to the objects?
>
> Thanks for your help...
> Please answer to my e-mail too.

The entry_changed signal handler has two arguments:

on_entry_changed (GtkEditable     *entry,
                  gpointer         user_data);

First is the GtkEntry that has changed, second is the user data 
given by the signal_connect().
So you dont need to pass two arguments in this case.