Re: [Vala] GObject Extensions

[Yu Feng <rainwoodman gmail com>]

Hi Matias,

1. Gdk.Window isn't a GObject.
2. I think once the class definition is closed, you can't extend it, but
why not try something like this:

[CCode cname=GdkWindow new=gdk_window_new ....]
class DrawingArea:Gdk.Window {
   public void unset_gl_capability (); 
   ....

}


This is hackish and I am not sure if it is even possible.

Yu
On Thu, 2008-07-17 at 18:53 -0300, =?ISO-8859-1?Q? Mat=EDas_De_la_Puente
_ wrote:
> Hi, all.
>
> It is possible to add extension functions to some GObjects in the vapi
> files?
> Here is a concrete sample.
>
> In gtkglext-1.0 there's some functions that extend a Gdk.Window
> object. I create a vapi file with this:
>
>         [CCode (lower_case_cprefix="gdk_window_")]
>         namespace GdkWindowExtension
>         {
>             [NoArrayLength]
>             public static weak Gdk.GL.Window set_gl_capability
> (Gdk.Window window, Gdk.GL.Config glconfig, int[] attrib_list);
>             public static void unset_gl_capability (Gdk.Window
> window);
>             public static bool is_gl_capable (Gdk.Window window);
>             public static weak Gdk.GL.Window get_gl_window (Gdk.Window
> window);
>             public static weak Gdk.GL.Drawable get_gl_drawable
> (Gdk.Window window);
>         }
>
>
> And a sample.vala code:
> ...
>         DrawingArea drawing_area = new DrawingArea ();
>         Gtk.GL.GtkWidgetExtension.set_gl_capability (drawing_area,
> glconfig, null, true, Gdk.GL.RenderType.RGBA_TYPE);
> ...
>
> There is a possibility to implement something (in the vapi file) for
> use a code like this?:
>
>         DrawingArea drawing_area = new DrawingArea ();
>         drawing_area.set_gl_capability (glconfig, null, true,
> Gdk.GL.RenderType.RGBA_TYPE);
>
> Im saying this because we only add functions to a Gdk.Window object (a
> GObject extension).
>
>
> Matias
>
>
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