Re: Use user_data in callback

[Jay Strict <jay strict posteo de>]

Nice, thank you,
your answers help a lot in learning this entire gnome-shell stuff.


Best regards,
Jay


On 23.09.2015 16:46, Norman L Smith wrote:
> Jay,
>
> See https://git.gnome.org/browse/gjs/tree/modules if you have not
> done so.  I did not think about the fact that your distro might
> not provide the files I referenced.
>
> Sorry about that..
> Norman
>
> On Wed, 2015-09-23 at 14:52 +0200, Jay Strict wrote:
> > On 23.09.2015 12:45, Norman L Smith wrote:
> > > Hello Jay,
> > >
> > > From /usr/share/gnome-js/signals.js
> >
> > Where do I find this file "signals.js"? It is not in my file system
> > tree.
> >
> > > function _connect(name, callback) {
> > >
> > > The connect takes two arguments.
> > >
> > > The callback argument, without binding additional arguments to 
> > > the callback, consists of only the function and its first and 
> > > second argument. 
> > >
> > > lang.bind as noted in the comments below provides for the use
> > > of "this" in the body of the callback function and binding
> > > additional arguments to the callback function.
> > >
> > > From /usr/share/gnome-js/lang.js
> >
> > Again, no file "lang.js", neither in /usr/share/gnome-shell/** nor in
> > /usr/** nor in https://github.com/GNOME/gnome-shell.git
> >
> > > /**
> > >  * Binds obj to callback. Makes it possible to refer to "obj"
> > >  * using this within the callback.
> > >  * @param {object} obj the object to bind
> > >  * @param {function} callback callback to bind obj in
> > >  * @param arguments additional arguments to the callback
> > >  * @returns: a new callback
> > >  * @type: function
> > >  */
> > >
> > > You will not see many examples of using the binding of additional 
> > > arguments because of "this" being available in the callback
> > > function.
> >
> > Ah ok, I see that you don't need additional arguments when you have
> > "this" available.
> >
> >
> > Kind regards,
> > Jay