Re: Interface signals.

[Tim Janik <timj gtk org>]

On 20 Dec 2000 jrb redhat com wrote:

> 
> What is the status of signals on interfaces, and when should I set them?
> There is no equivilant of a GClassInitFunc for them.  Should I do it in
> the initial get_type() stage?  I don't think I should do it when I add
> the interface to a class, as that could happen several times?

urm, yes, type_init is probably a bad idea, but interfaces have no
common one-time initializer. haven't actually run into this yet,
for the moment, it's probably best if you use the base_init function
of the interface's GTypeInfo structure and guard that against multiple
invocations, i.e.:

static void
my_interface_base_class_init (gpointer g_class)
{
  static gboolean signals_setup = FALSE;
  
  if (!signals_setup)
    {
      signals_setup = TRUE;
      
      /* do signal_new here */
    }
}

i'd like to review your code using interface signals btw, while the
signal system should definitely support them now, i suspect there're
still issues with destroying signals of dynamic interfaces.

> 
> Thanks,
> -Jonathan
> 

---
ciaoTJ