Re: [Vala] Access the "klass" parameter of a class_init() function in vala with "static construct"

[Sébastien Wilmet <sebastien wilmet gmail com>]

2010/7/31 Evan Nemerson <evan coeus-group com>

> On Sat, 2010-07-31 at 17:59 +0200, Sébastien Wilmet wrote:
> > Hello!
> >
> > What I want to do is to implement a GtkAction derived class which sets
> > GtkActionClass:toolbar_item_type to GTK_TYPE_MENU_TOOL_BUTTON in its
> > class_init function.
>
> Vala doesn't currently expose *Class structs in the bindings, so AFAIK
> what you're talking about can't be done easily. I'm not exactly an
> expert on GObject, but I think you should be able to hack something
> together by going creating bindings for GtkActionClass then getting
> access to it with GLib.Object.get_class. This is untested, but you
> should get the idea:
>
>
> /* In a vapi */
> [Compact, CCode (cname = "GtkActionClass")]
> public class GtkActionClass {
>  public GLib.Type menu_item_type;
>  public GLib.Type toolbar_item_type;
> }
>
> /* Your code */
> unowned GtkActionClass ac = (GtkActionClass) this.get_class ();
> ac.toolbar_item_type = typeof (MenuToolButton);
I have this error:
error: Access to instance member `GLib.Object.get_class' denied

Also, in C the cast can be made because the first field in a Class struct is
the parent class.

Sébastien