Re: Use user_data in callback

[Jay Strict <jay strict posteo de>]

It is very useful, as this is exactly how it works now.
Thank you.
        
What is the reason that without Lang.bind() the function can access the
first two arguments ("emitter" and "event") but not the third one?

And why is it different with Lang.bind()?

Regards
Jay

On 22.09.2015 19:05, Norman L. Smith wrote:
> You need to use Lang.bind.
>
> See 
> https://paste.fedoraproject.org/270197/
> or
> http://ur1.ca/nu9t9
>
>
> Hope this is useful.
>
> Norman
>
> On Tue, 2015-09-22 at 11:44 +0200, Jay Strict wrote:
> > I am writing a gnome-shell extension and I am trying to connect the
> > 'activate'-signal of a PopupMenuItem to a callback function like
> > this:
> >
> >
> > =====================================================================
> > =
> > let item = new PopupMenu.PopupMenuItem("test")
> > item.connect(
> >     'activate',
> >     function(emitter, event, user_data) {
> >         Main.notifyError("user_data: " + user_data);
> >     },
> >     "test1",
> >     "test2",
> >     "test3",
> >     "test4");
> > this.folderMenu.addMenuItem(item);
> > =====================================================================
> > =
> >
> > I expected the output to be "user_data: test1".
> > However, when I click on the PopupMenuItem, the output is "user_data:
> > undefined".
> > How can I assign some user_data to this signal?
> >
> >
> > Thank you in advance.
> > Jay
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