Re: What gives us the macro GSEAL()?

[Grzegorz Kuczyński <gk180984 interia pl>]

Colomban Wendling pisze:
> Simply because access to window->title will not be possible any more,
> as I explained in another mail.
>
> ----- another mail:
> No, AFAIK, GSEAL_ENABLE is not meant to be put in any GTK+ header,
> only to be added by hand to your programs' compiling options (e.g.
> - -DGSEAL_ENABLE to a GCC's command line) in order to check your program
> for compatibility with upcoming releases.
> -----
>   
so if your programs not define GSEAL_ENABLE you  can not use for GTK+ 
3.0 library, yes? (compiling program in GTK+ 3.0 without GSEAL_ENABLE is 
impossible - realy impossible?)

> For now, if you define GSEAL_ENABLE when compiling an application
> accessing window->title, it will fail since window->title doesn't
> exist: it is renamed window->_g_sealed__title. But you have not to
> know this other name, ...
of course ;)
> All this is because the object can't be notified of a modification of
> one of it's properties if it is not done by the GObject's mechanism,
> or at least an object's function. And if an object is not notified of
> a change, it can't do the work it should do when this change happen,
> e.g. for the window's title example, update the window's titlebar.
> And using only GObject's property mechanism allows a lot of nice
> features like use of the notify::property-name signal and so on.
>   
void
gtk_window_set_title (GtkWindow   *window,
             const gchar *title)
{
 ...
 window->title = new_title;
 ...
 g_object_notify (G_OBJECT (window), "title");  // it you mean :)
}

----- another mail:

> > Explaining the meaning of GTK's structure members is not a good idea
> > IMO since they may are going to change and perhaps become opaque. The
> > right way to access object's properties is to use accessors, and that
> > will become the only way.
> >  

> unless you are right, but this is not change this that I must be know
> (and I want) know what is going in GTK+ sources
> I think about this...

I don't really understand what you mean here, sorry :/

-----
this is my fault - sorry

I wanted say that you are right: "Explaining the meaning of GTK's 
structure members is not a good idea"

Thanks all for answer.

---
Grzegorz Kuczyński





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