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Date: Tue, 02 Dec 2008 11:18:33 +0900 (JST)
Message-Id: <20081202.111833.33962760.garrigue at math.nagoya-u.ac.jp>
To: lablgtk at yquem.inria.fr, mle+ocaml at mega-nerd.com
Subject: Re: [Lablgtk] Gdk.cursor / Gtk.Window type error
From: Jacques GARRIGUE <garrigue at math.nagoya-u.ac.jp>
In-Reply-To: <20081202115407.abc82b31.mle+ocaml at mega-nerd.com>
References: <20081202115407.abc82b31.mle+ocaml at mega-nerd.com>
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You just forgot the parentheses around (win:Gdk.window)
Without them, this does not specify the type of win, but the return
type of the function. Hence the error.

Cheers,

Jacques

From: Erik de Castro Lopo <mle+ocaml@mega-nerd.com>
> Hi all,
> 
> I am trying to temporarily hide the mouse cursor and for that I 
> need a transparent cursor object which I'm trying to create as
> follows:
> 
>     let create_null_cursor win:Gdk.window =
>         let w, h = 10, 10 in
>         let mask = Gdk.Bitmap.create ~window:win ~width:w ~height:h () in
>         let pixmap = Gdk.Pixmap.create ~window:win ~width:w ~height:h ~depth:1 () in
>         let color = Gdk.Color.alloc (Gdk.Color.get_system_colormap ()) (`RGB (255, 0, 0)) in
>         Gdk.Cursor.create_from_pixmap pixmap mask color color w h
> 
> but that fails to compile with the following error message:
> 
>     This expression has type Gdk.cursor but is here used with type
>       Gdk.window = [ `drawable | `gdkwindow ] Gobject.obj
> 
> My experimentation so far seems to suggest that the type of the win
> parameter is not fully known, but I'm not sure how to make the compiler
> happy about this.
> 
> Anyone have any clues about this?
> 
> Cheers,
> Erik
> -- 
> -----------------------------------------------------------------
> Erik de Castro Lopo
> -----------------------------------------------------------------
> Rule 1: Spammers lie.
> Rule 2: If a spammer seems to be telling the truth, see Rule #1.
> 
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