Re: [Caml-list] lablGtk - newbie question

[Maxence Guesdon <max@sbuilders.com>]

Andrew Lawson a écrit :
> 
> Hi all
>         I've just started learning ocaml and lablGtk. I'm writing a
> small utility and I'm trying to encapsulate the gui in a class, a
> simplified example is below;
> 
> class mainWindow () =
>     object (self)
>         val winMain = GWindow.window ~title:"Cadb" ~border_width:10
> i                                       ~width:400 ~height:400 ()
>         val butNew = GButton.button ~label:"New" ()
>         initializer
>             winMain#add butNew; (* This would seem the obvious thing to
> do but it doesn't work *)
>             winMain#connect#destroy ~callback:Main.quit;
>             winMain#show ()
>     end
> 
>         Now I have to pack the button into the window, obviously I can't
> do it in the val expression but I can't work out how to do it in the
> initializer. Can someone help?
> 
to pack the button in the window :

winMain#add butNew#coerce;

BTW, a cool way to make the same but using the ~packing parameters :

class mainWindow () =
  let winMain = GWindow.window ~title:"Cadb" ~border_width:10 ... in
  let _ = winMain#connect#destroy ~callback:Main.quit in
  let butNew = GButton.button ~label:"New" ~packing: winMain#add () in

  object (self)

    initializer
      winMain#show ()
 end

--
Maxence Guesdon
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