Re: [Vala] Properties == GObject properties?

[Jonas Kulla <nyocurio gmail com>]

2013/10/11 Tal Hadad <tal_hd hotmail com>

> >  Hi,
> >
> > On Fri, Oct 11, 2013 at 9:34 AM, Tal Hadad <tal_hd hotmail com> wrote:
> > > First time I hear not all properties are GObject.
> > >
> > > Suppose I have this property:
> > >
> > > ...
> > > public int 1numbered { get; set; }
> > > ...
> > >
> > > This is not a GObject property, since it's started with a number.
> >
> > You can't have that at all, see
> > https://wiki.gnome.org/Vala/Tutorial#Syntax_Overview :
> >
> > "For identifier names the same rules apply as for C identifiers: the
> > first character must be one of [a-z], [A-Z] or an underscore,
> > subsequent characters may additionally be digits [0-9]."
> >
> > Signal names also must start with a letter:
> https://developer.gnome.org/gobject/stable/gobject-Signals.html#g-signal-new
> > Regards, Simon
>
> But suppose there's a property which is valid for Vala, but can't be
> GObject property,
> what then would be the answer for my questions?

Hi,

the answer would be: yes, you would _not_ be able to connect to a 'notify'
signal for a property that's not backed by GObject managed properties
(such as would happen for Compact classes), and yes, you should still be
able to emit a custom signal from withing any getter/setter, as those are
just syntactical sugar that turn

    obj.a = 14;

into

    myobj_set_a(obj, 14);

Of course you would have to declare the 'notify' signal.

Jonas