Re: GtkAda. Printing

["ldries46" <bertus.dries@planet.nl>]

Yes Print is declared as Gtkada_Print_Operation; and still in the Call to 
routine Set_N_Pages(Print_Op, 1); the compiler does not find an error while 
the declaration is

procedure Set_N_Pages
   (Self    : not null access Gtk_Print_Operation_Record;
    N_Pages : Gint);

and

type Gtkada_Print_Operation_Record is new
  Gtk_Print_Operation_Record with private;
type Gtkada_Print_Operation is access all Gtkada_Print_Operation_Record;

I expect that in the compiler to react the same in simular cases. Therefore 
I think that the error in lines 190:30 is the real error and the one I asked 
about.

"Dmitry A. Kazakov"  schreef in bericht news:nns747$s6g$1@gioia.aioe.org...

On 2016-08-03 09:02, ldries46 wrote:

> 190:07: missing argument for parameter "Slot" in call to "On_Draw_Page"
> declared at gtk-print_operation.ads:769
> 190:20: expected an access type with designated type
> "Gtk_Print_Operation_Record" defined at gtk-print_operation.ads:98
> 190:20: found type "Gtkada_Print_Operation" defined at
> gtkada-printing.ads:104

The compiler told you everything you need. You use an instance of
Gtkada_Print_Operation instead of access Gtk_Print_Operation_Record.

The types are declared as follows:

type Gtkada_Print_Operation_Record is
    new Gtk_Print_Operation_Record with private;
type Gtkada_Print_Operation is access all Gtkada_Print_Operation_Record;

P.S. Granted, it seems a glitch in the GtkAda bindings which should have
used access Gtk_Print_Operation_Record'Class instead. But nothing you
could not workaround with an explicit type conversion...

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de