Re: [Vala] Properties == GObject properties?

[Tal Hadad <tal_hd hotmail com>]

> Of course you would have to _declare_ the 'notify' signal.
I suppose that by "declare" you mean invoking notify("property")
inside the setter.

Thank everyone for the full answer.
Tal

Date: Fri, 11 Oct 2013 16:25:27 +0200
Subject: Re: [Vala] Properties == GObject properties?
From: nyocurio gmail com
To: tal_hd hotmail com
CC: vala-list gnome org

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 beable to emit a custom signal from 
withing any getter/setter, as those arejust syntactical sugar that turn

    obj.a = 14;
into
    myobj_set_a(obj, 14);
Of course you would have to declare the 'notify' signal.
Jonas