Re: [Vala] broken gtk+ binding?

["Phil Housley" <undeconstructed gmail com>]

On 09/12/2007, Nguyen Thai Ngoc Duy <pclouds gmail com> wrote:
> Hi,
>
> I tried this code:
>
> class MyComp : Gtk.Window {
>         construct {
>                 var b = new Gtk.Button.with_label("hellp");
>                 b.clicked += on_clicked;
>                 add(b);
>         }
>
>         void on_clicked() {
>                 GLib.stdout.printf("Help!\n");
>         }
>
>         static int main(string[] p) {
>                 Gtk.init(out p);
>                 MyComp w = new MyComp();
>                 w.show_all();
>                 Gtk.main();
>                 return 0;
>         }
> }
>
> The generated code for signal "clicked" was
>
> static void my_comp_on_clicked (MyComp* self) {
>         g_return_if_fail (IS_MY_COMP (self));
>         fprintf (stdout, "Help!\n");
> }
>
> It should have been *_clicked(GtkWidget*, MyComp*). Was it code
> generation broken or did I write something wrong? Vala revision was
> 760.
>
> Thanks
> --
> Duy

A signal handler function should be declared with a first argument of
the type of the object emitting the signal (GtkButton).  Then vala
will pass the object receiving it (MyComp) automatically as the
user_data argument.

void on_clicked(Gtk.Button btn) { ... }

Should work fine.  Alternatively the equivalent lambda:

b.clicked += btn => { ... };

-- 
Phil Housley