I''m having some problems with a class I am creating. My end goal is
to be able to instantiate a class and use its return value as a
particular object.
So far, here''s my code:
SomeDiv = Class.create ({
initialize: function () {
obj = new Element("div");
return obj;
}
});
Event.observe(window, ''load'', function() {
$(''otherDiv'').appendChild(new SomeDiv());
});
Firebug says: "Node cannot be inserted at the specified point in the
hierarchy" so my guess is that it is not creating the div object. Any
suggestions? Thanks!
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Travis wrote:> I''m having some problems with a class I am creating. My end goal is > to be able to instantiate a class and use its return value as a > particular object. > > So far, here''s my code: > > SomeDiv = Class.create ({...}); > > Event.observe(window, ''load'', function() { > $(''otherDiv'').appendChild(new SomeDiv()); > }); > > Firebug says: "Node cannot be inserted at the specified point in the > hierarchy" so my guess is that it is not creating the div object. Any > suggestions? Thanks!Travis, Not sure exactly what functionality you''re trying to achieve, but using the "new" keyword will always return an object of that instance. Element#appendChild requires that the argument given be a DOM Element. You''ll need to do something along these lines: SomeDiv = Class.create({ initialize: function(msgNode) { this.node = new Element("div"); this.msg = $(msgNode); // add some custom method to our node this.node.manipulate = this.manipulate.bind(this); // garbage collect Event.observe(window, ''unload'', function() { this.node.manipulate = null; }.bind(this)); }, manipulate: function(style, html) { // do stuff to the node this.node.setStyle(style); this.node.update(html); this.msg.update(''manipulated''); } }); Event.observe(window, ''load'', function() { $(''otherDiv'').appendChild(new SomeDiv().node); }); - Ken Snyder --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Spinoffs" group. To post to this group, send email to rubyonrails-spinoffs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-spinoffs-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-spinoffs?hl=en -~----------~----~----~----~------~----~------~--~---
I guess a similar technique that does work would be:
$(''otherDiv'').appendChild(new Element("div"));
Basically I just want to a create a class that creates an Element
object and then do some other things with the Element object before it
returns it.
On Apr 25, 3:54 pm, Ken Snyder
<kendsny...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Travis wrote:
> > I''m having some problems with a class I am creating. My end
goal is
> > to be able to instantiate a class and use its return value as a
> > particular object.
>
> > So far, here''s my code:
>
> > SomeDiv = Class.create ({...});
>
> > Event.observe(window, ''load'', function() {
> > $(''otherDiv'').appendChild(new SomeDiv());
> > });
>
> > Firebug says: "Node cannot be inserted at the specified point in
the
> > hierarchy" so my guess is that it is not creating the div object.
Any
> > suggestions? Thanks!
>
> Travis,
>
> Not sure exactly what functionality you''re trying to achieve, but
using
> the "new" keyword will always return an object of that instance.
> Element#appendChild requires that the argument given be a DOM Element.
> You''ll need to do something along these lines:
>
> SomeDiv = Class.create({
> initialize: function(msgNode) {
> this.node = new Element("div");
> this.msg = $(msgNode);
> // add some custom method to our node
> this.node.manipulate = this.manipulate.bind(this);
> // garbage collect
> Event.observe(window, ''unload'', function() {
> this.node.manipulate = null;
> }.bind(this));
> },
> manipulate: function(style, html) {
> // do stuff to the node
> this.node.setStyle(style);
> this.node.update(html);
> this.msg.update(''manipulated'');
> }
>
> });
>
> Event.observe(window, ''load'', function() {
> $(''otherDiv'').appendChild(new SomeDiv().node);
>
> });
>
> - Ken Snyder- Hide quoted text -
>
> - Show quoted text -
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Thank you for the response Ken. It doesn''t seem to update the div with ''manipulated''. Maybe its not suppose to? If not, how would I do that. Thanks! On Apr 25, 3:54 pm, Ken Snyder <kendsny...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Travis wrote: > > I''m having some problems with a class I am creating. My end goal is > > to be able to instantiate a class and use its return value as a > > particular object. > > > So far, here''s my code: > > > SomeDiv = Class.create ({...}); > > > Event.observe(window, ''load'', function() { > > $(''otherDiv'').appendChild(new SomeDiv()); > > }); > > > Firebug says: "Node cannot be inserted at the specified point in the > > hierarchy" so my guess is that it is not creating the div object. Any > > suggestions? Thanks! > > Travis, > > Not sure exactly what functionality you''re trying to achieve, but using > the "new" keyword will always return an object of that instance. > Element#appendChild requires that the argument given be a DOM Element. > You''ll need to do something along these lines: > > SomeDiv = Class.create({ > initialize: function(msgNode) { > this.node = new Element("div"); > this.msg = $(msgNode); > // add some custom method to our node > this.node.manipulate = this.manipulate.bind(this); > // garbage collect > Event.observe(window, ''unload'', function() { > this.node.manipulate = null; > }.bind(this)); > }, > manipulate: function(style, html) { > // do stuff to the node > this.node.setStyle(style); > this.node.update(html); > this.msg.update(''manipulated''); > } > > }); > > Event.observe(window, ''load'', function() { > $(''otherDiv'').appendChild(new SomeDiv().node); > > }); > > - Ken Snyder- Hide quoted text - > > - Show quoted text ---~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Spinoffs" group. To post to this group, send email to rubyonrails-spinoffs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-spinoffs-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-spinoffs?hl=en -~----------~----~----~----~------~----~------~--~---
Travis, Returning values from initialize() is not supported. If you want this behavior here is a patch to achieve it: http://dev.rubyonrails.org/ticket/11481 you could also do: var foo = new MyClass.toSomeValue(); - JDD --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Spinoffs" group. To post to this group, send email to rubyonrails-spinoffs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-spinoffs-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-spinoffs?hl=en -~----------~----~----~----~------~----~------~--~---