Re: [Vala] Use of Gtk.Builder.connect_signals() on object instance

[Luca Bruno <lethalman88 gmail com>]

On Sun, Apr 10, 2011 at 01:02:32AM +0200, lubiluk gmail com wrote:
> Hi,
>
> can anyone explain me how does the Gtk.Builder.connect_signals() method
> works?
> You can read in guide (http://live.gnome.org/Vala/GTKSample) that when we
> want to connect signals with method of instanced object then we have to
> annotate the method with [CCode (instance_pos = -1)] and pass pointer to the
> object to connect_signal(pointer).
> Ok, that works, but why it works as well when I neither annotate my method
> nor pass the pointer?
>
> The code below actually works but according to all guides it shouldn't. Why?
>
> class TestApp {
>
>    public TestApp() {
>       try {
>          this.builder = new Gtk.Builder ();
>          builder.add_from_file("../ui/interface.glade");
>          builder.connect_signals(null);
>        } catch (Error e) {
>          stderr.printf("Could not load UI: %s\n", e.message);
>        }
>    }
>
>    public void on_close() {
>        stdout.printf("Quit application\n");
>        Gtk.main_quit();
>    }
>
> }

Because you are not using "this" inside on_close. Your on_close is used like
a static method.

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