Re: Problem with Gtk.SpinButton.new_with_range

[Thiago Bellini Ribeiro <hackedbellini gmail com>]

On Sun, Apr 28, 2013 at 7:16 PM, Giovanni Campagna
<scampa giovanni gmail com> wrote:
> 2013/4/28 Thiago Bellini Ribeiro <hackedbellini gmail com>:
> > Hi!
> >
> > 2 people send me error reports about this problem [1] when opening the
> > preferences dialog of my extension [2] on 3.8. One of them said he is
> > using Arch Linux with the latest updates.
> >
> > The error says new_with_range is not a constructor.. But I'm confused.
> > That code worked fine (with totally no errors) from 3.4 to 3.6. Also,
> > when I was testing the extension on a virtual machine with a daily
> > build of fedora (to test 3.8), the preferences window worked (so, that
> > problem didn't exist there).
> >
> > Also, I took a look at the 3.8's GtkSpinButton [3] documentation and
> > new_with_range is still a constructor.
>
> new_with_range has never been a constructor, in the JS sense. It's a
> regular function that returns a Gtk.SpinButton.
>
> > So, my question is: What is happening there? Does the js binding
> > changed? Should I change the syntax I'm using
> > (Gtk.SpinButton.new_with_range)? And why did the problem happened for
> > those guys and not for me (on my tests) and other people (I suppose I
> > would have received many more error reports if that was affecting
> > everyone)?
>
> You're calling "new (Gtk.SpinButton.new_with_range)(...)" (parentheses
> mine), i.e. creating an object whose class is
> Gtk.SpinButton.new_with_range. That evaluates to:
> - create an object
> - invoke Gtk.SpinButton.new_with_range(...) with that object as this
>   the call ignores the this object because it's not a method
> - the return value is not undefined, discard the original object and
> return the new one.
>
> This is valid JS, after all, but it's obviously wrong: what you want
> there is either
> new Gtk.SpinButton({ adjustment: new Gtk.Adjustment(...) });
> or
> Gtk.SpinButton.new_with_range(...)
> (without new)

Oh, I get it now.. I'll do the modification and upload the new version
to ego. Thanks! :)

Just for curiosity...why did that (using "new" on "new_with_range")
worked on 3.4/3.6? Should I be worried and provide an update for those
versions too? Because I use 3.4 at my pc (Debian Wheezy) and my spouse
uses 3.6 on hers (Ubuntu Quantal) and both works fine with that wrong
syntax.

> Giovanni

--
Thiago Bellini Ribeiro | http://hackedbellini.org

“Real knowledge is to know the extent of one's ignorance.” - Confucius