From: Alain De Vos <devosalain71@gmail.com>
Subject: Re: gtkada Connecting via the Gtk.Handlers object_connect problem
Date: Sun, 3 Nov 2019 13:46:56 -0800 (PST)
Date: 2019-11-03T13:46:56-08:00 [thread overview]
Message-ID: <a5e0d655-8dad-4b8f-b6c2-c43ae819a7d7@googlegroups.com> (raw)
In-Reply-To: <a3b3f3cb-0352-439e-a4fa-d4fc39ba4053@googlegroups.com>
On Sunday, November 3, 2019 at 4:24:15 PM UTC+1, Alain De Vos wrote:
> On Sunday, November 3, 2019 at 4:23:12 PM UTC+1, Alain De Vos wrote:
> > On Sunday, November 3, 2019 at 2:26:37 PM UTC+1, Alain De Vos wrote:
> > > On Sunday, November 3, 2019 at 2:03:55 PM UTC+1, Dmitry A. Kazakov wrote:
> > > > On 2019-11-03 12:37, Alain De Vos wrote:
> > > > > I try an application with one button and one label and one handler
> > > > >
> > > > > http://docs.adacore.com/live/wave/gtkada/html/gtkada_ug/signals.html#second-case-using-object-connect-instead
> > > > > -------------------------
> > > > > I have a file myvboxpak.ads ->
> > > > > package myvboxpak is
> > > > >
> > > > > type MyVBoxR is new Gtk_VBox_Record with record
> > > > > Button : Gtk_Button;
> > > > > Label : Gtk_Label;
> > > > > end record;
> > > > > type MyVBoxT is access all MyVBoxR'Class;
> > > > >
> > > > > package MYCB is new Gtk.Handlers.User_Callback(Glib.Object.GObject_Record,MyVBoxT);
> > > > >
> > > > > procedure MyButtonClick (T : MyVBoxR'Class); --eventhandler ^^^^^^^^^^^^^^^^^^^
> > > > Should have been T : access MyVBoxR'Class
> > > >
> > > > --
> > > > Regards,
> > > > Dmitry A. Kazakov
> > > > http://www.dmitry-kazakov.de
> > >
> > > I changed the handler to :
> > > package body myvboxpak is
> > > procedure MyButtonClick (T : access MyVBoxR'Class) is
> > > begin
> > > begin
> > > T.Button.Set_Label ("You pressed");
> > > ...
> > >
> > > Compile error of the connect_object function is still :
> > > MYCB.Object_Connect
> > > (Widget => MYVBOX.Button,
> > > Name => "clicked",
> > > Marsh => MYCB.To_Marshaller (MyButtonClick'Access), -- The signal handler
> > > Slot_Object =>Top,
> > > User_Data => MYVBOX
> > > );
> > > Error :
> > > Compile
> > > [Ada] hello.adb
> > > hello.adb:35:27: no candidate interpretations match the actuals:
> > > hello.adb:35:56: expected type "Handler" defined at gtk-marshallers.ads:546, instance at gtk-handlers.ads:1164, instance at myvboxpak.ads:17
> > > hello.adb:35:56: found type access to procedure "MyButtonClick" defined at line 35
> > > hello.adb:35:56: ==> in call to "To_Marshaller" at gtk-handlers.ads:1205, instance at myvboxpak.ads:17
> >
> > Some additional info :
> > mymarsh : Gtk.Marshallers.General_Handler;
> >
> > mymarsh := MYCB.To_Marshaller (Cb => MyButtonClick'Access);
> >
> > Error : no candidate interpretations match the actuals expected type "Handler"
> >
> > package MYCB is new Gtk.Handlers.User_Callback(Glib.Object.GObject_Record,MyVBoxT);
> >
> > MYCB.Object_Connect
> > (Widget => MYVBOX.Button,
> > Name => "clicked",
> > Marsh => mymarsh,
> > Slot_Object =>Top,
> > User_Data => MYVBOX,
> > After => False
> > );
> >
> > Error :
> > Marsh => mymarsh,
> > Expected type marchaller.
>
> expected type "Handler" in mymarsh := MYCB.To_Marshaller (Cb => MyButtonClick'Access);
I think I need a marshaller, a handler or a simple-handler.
http://docs.adacore.com/gtkada-docs/gtkada_rm/gtkada_rm/docs/gtk__marshallers___user_void_marshallers___spec.html#L492C12
http://docs.adacore.com/gtkada-docs/gtkada_rm/gtkada_rm/docs/gtk__handlers___user_callback___spec.html#L1057C12
http://docs.adacore.com/gtkada-docs/gtkada_rm/gtkada_rm/docs/gtk__handlers___user_callback___spec.html#L1061C12
next prev parent reply other threads:[~2019-11-03 21:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-03 11:37 gtkada Connecting via the Gtk.Handlers object_connect problem Alain De Vos
2019-11-03 13:03 ` Dmitry A. Kazakov
2019-11-03 13:26 ` Alain De Vos
2019-11-03 15:23 ` Alain De Vos
2019-11-03 15:24 ` Alain De Vos
2019-11-03 21:46 ` Alain De Vos [this message]
2019-11-04 23:44 ` Alain De Vos
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