From: Rick DeNatale <rick.denatale@...>
Date: 2010-10-04T22:09:54+09:00
Subject: Re: Object.object.method()

Alors! GTK ne parle pas français? <G>

And in Ruby 1.9 you could spell it properly as fenêtre, but it would
still cause a "No Method" error.

On Mon, Oct 4, 2010 at 5:49 AM, Jean-Julien Fleck
<jeanjulien.fleck@gmail.com> wrote:
> 2010/10/3 Johan Soderholm <teisto@surfy.net>:
>> Hello, obviously it's a time for a noobie question. What the following
>> statement means?
>>
>> Object.object.method()
>>
>> Sample code:
>>
>> window = Gtk::Window.new(Gtk::Window::TOPLEVEL)
>> area = Gtk::DrawingArea.new()
>> area.window.set_cursor(Gdk::Cursor.new(Gdk::Cursor::PENCIL))
>>
>> I'm confused. Can anyone enlight me?
>
> To complete Rick's answer, the "window" in the last line has
> (normally) *nothing* to do with your window variable. Ruby sees that
> you are trying to talk to the object "area" (because of the dot) so it
> politely ask "area" if it has a method named "window" (which I assume
> it has). You could try
>
> fenetre = Gtk::Window.new(Gtk::Window::TOPLEVEL)
> area = Gtk::DrawingArea.new()
> area.window.set_cursor(Gdk::Cursor.new(Gdk::Cursor::PENCIL))
>
> it should still work (assuming you change all the other occurence of
> *variable* "window" into "fenetre")
>
> On the contrary, the code
>
> fenetre = Gtk::Window.new(Gtk::Window::TOPLEVEL)
> area = Gtk::DrawingArea.new()
> area.fenetre.set_cursor(Gdk::Cursor.new(Gdk::Cursor::PENCIL))
>
> should not work: ruby should complain with a "NoMethodError"
>
> Cheers,
>
> --
> JJ Fleck
> PCSI1 Lycée Kléber
>
>



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Rick DeNatale

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