Re: Scrolling a Tree View before it's realized

[Attilio Fiandrotti <attilio fiandrotti gmail com>]

tomas tuxteam de wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On Sat, Nov 11, 2006 at 11:51:20AM +0100, Attilio Fiandrotti wrote:
>
> > Attilio Fiandrotti wrote:
> >
> > > Hi
> > >
> > > In an application i add many items to a ListStore and make it scroll on 
> > > the fly to the default option row,  like this
>
> [...]
>
> > I eventually managed this by scrolling the treeview from a callback that 
> > gets fired after the expose event is fired.
> > In order to have scrolling performed only the first time expose event is 
> > fired, i use a global flag which i reset from inside the callback the 
> > first time it's run.
> > I now would like to know if there is a way to run a signal handler only 
> > once and without using a second signal handler or global flags.
>
>
> You just might want to call g_signal_handler_disconnect from whithin the signal
> handler. You'll have to stash the handler ID you get from
> g_signal_connect() somewhere accessible from the handler (for example in
> the user data struct).
>
> OTOH, g_signal_add_emission_hook()  seems to be the function made for
> you :)
>
> In an emission hook function you just return FALSE if you want the hook
> to be removed. You'll have to check whether your particular signal
> accepts emission hooks, though.

disconnecting the signal handler from within the callback function did 
the trick.

thanks

Attilio