Re: Question on emission hooks

[Lucas Di Pentima <lucas lunix com ar>]

Nickolay,

Nickolay V. Shmyrev wrote:

> Sorry for style of my first answer, it seems that you have quite old
> glib, because now (in 2.4.0 )it is impossible to g_signal_lookup on
> G_TYPE_OBJECT, since it is not G_TYPE_IS_INSTANTIABLE, that's why I
> thought that you are trying to to add emission hook to "notify" signale
> of your type GWP_TYPE_SHIP, not G_TYPE_OBJECT. 
I'm using glib 2.4.0, and what I wanted to do (I don't know if it's 
possible) is to use a emission hook callback every time one of my own 
types's properties changes. I have 500 GWP_TYPE_SHIPs on my application, 
so I don't want to connect to the "notify" signal in every ship.

What I don't know is if I have a GwpShip object that is a subclass of 
GObject...the "notify" signal if inherited? I tried both...I defined it 
on GwpShip and got the same signal_id = 1, I changed its name to 
something else and got a higher number and the error message disappeared 
when I connected an emission hook to it...so my code not so bad written :-)

> Even if you can get signal_id, it is not clear, that you can add
> emission hook to that signal, because signal can have flag
> G_SIGNAL_NO_HOOKS. The "notify" signal of g_object is exactly such
> signal, that is why you get warning message. 
So I cannot override it? Nevertheless the code you copied from glib's 
sources don't have the G_SIGNAL_NO_HOOKS flag.

Regards,
--
Lucas Di Pentima - Santa Fe, Argentina - Jabber ID: lucas lunix com ar
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