[gtkada] Signal handler

[Emmanuel Briot]

> In package Gtk.Entry_Completion:
>     --  - "match_selected"
>     --    procedure Handler
>     --       (Completion : access Gtk_Entry_Completion_Record'Class;
>     --        Model      : Gtk_Tree_Model;
>     --        Iter       : Gtk_Tree_Iter);
>     --    Gets emitted when a match from the list is selected. The default
>     --    behaviour is to replace the contents of the entry with the contents of
>     --    the text column in the row pointed to by Iter.
>     --    Return value: %TRUE if the signal has been handled
>
> How can I instantiate a package from Gtk.Handlers to connect this handler?

You should instantiate Gtk.Handlers.Callback as usual.
GtkAda does not have a Marshaller for this profile (ie a function that converts 
from the C level GValues into (Model, Iter)), so you have to use, as a callback, 
a procedure with the following profile (from Gtk.Handlers.Callback)

       type Handler is access procedure
         (Widget : access Widget_Type'Class;
          Params : Glib.Values.GValues);

and then extract the arguments from Params yourself.
    Model := Get_Object (Nth (Params, 0));   --  ??? Perhaps 1, not sure
    Gtk.Tree_Model.Get_Tree_Iter (Nth (Params, 1), Iter);

I haven't tested this, so you might have to adapt a bit to get it to work.

regards
Emmanuel