# LiveTree substitute **URL:** \ **Category:** Rails\ **Created:** [May 6, 2008, 2:33am UTC](https://www.ruby-forum.com/t/livetree-substitute/136749 "2008-05-06T02:33:56Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![acras](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f4b2a3/32.png) [@acras](https://www.ruby-forum.com/u/acras)\ **Post date:** [May 6, 2008, 2:33am UTC](https://www.ruby-forum.com/t/livetree-substitute/136749/1 "2008-05-06T02:33:56Z")
heyah! Is there any treeView plugin other than liveTree out there? thanks – Ricardo A. removed\_email\_address@domain.invalid Acras Sistemas +55+41-3232-6404 [www.acras.net](http://www.acras.net) ---
**Author:** ![acras](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f4b2a3/32.png) [@acras](https://www.ruby-forum.com/u/acras)\ **Post date:** [May 6, 2008, 6:19pm UTC](https://www.ruby-forum.com/t/livetree-substitute/136749/2 "2008-05-06T18:19:05Z")
ExtJs has a tree (in fact a whole js-based UI suite) that’s pretty nice. What I like most is that you can declare the tree with a url and let it render quickly, then query the db for the nodes and leaves. ---
**Author:** ![acras](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f4b2a3/32.png) [@acras](https://www.ruby-forum.com/u/acras)\ **Post date:** [May 7, 2008, 12:21am UTC](https://www.ruby-forum.com/t/livetree-substitute/136749/3 "2008-05-07T00:21:37Z")
Do know that ExtJS has a GPL3 license and a commercial license. If you use it for non-open source projects, you need to pay. On 06 May 2008, at 18:18, AndyV wrote: > ExtJs has a tree (in fact a whole js-based UI suite) that’s pretty > nice. What I like most is that you can declare the tree with a url > and let it render quickly, then query the db for the nodes and leaves. > > On May 5, 8:33 pm, “Ricardo A.” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > heyah! > > > > Is there any treeView plugin other than liveTree out there? Best regards Peter De Berdt ---
**Author:** ![acras](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f4b2a3/32.png) [@acras](https://www.ruby-forum.com/u/acras)\ **Post date:** [May 16, 2008, 6:14pm UTC](https://www.ruby-forum.com/t/livetree-substitute/136749/4 "2008-05-16T18:14:05Z")
But is there any plugin to use it? I’ve seen this [1], but there is no much doc about it out there. And finally, just a couple of questions regarding the facilities of ExtJs: - Can I populate the tree nodes with non-AR models? And with Ruby code such as in LiveTree? - Can I have leave nodes with different image icons? (yes, I need it ☹ ) Lots of thanks. [1] [http://inside.glnetworks.de/2008/01/08/ext-js-and-rails-how-do-they-get-along/](http://inside.glnetworks.de/2008/01/08/ext-js-and-rails-how-do-they-get-along/) Peter De Berdt wrote: > Do know that ExtJS has a GPL3 license and a commercial license. If you > use it for non-open source projects, you need to pay. > > On 06 May 2008, at 18:18, AndyV wrote: > > > ExtJs has a tree (in fact a whole js-based UI suite) that’s pretty > > nice. What I like most is that you can declare the tree with a url > > and let it render quickly, then query the db for the nodes and leaves. > > > > On May 5, 8:33 pm, “Ricardo A.” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > > heyah! > > > > > > Is there any treeView plugin other than liveTree out there? > > Best regards > > Peter De Berdt ---
**Author:** ![acras](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f4b2a3/32.png) [@acras](https://www.ruby-forum.com/u/acras)\ **Post date:** [May 16, 2008, 9:49pm UTC](https://www.ruby-forum.com/t/livetree-substitute/136749/5 "2008-05-16T21:49:35Z")
@Peter – You’re right, I think they’ve changed their licensing three times in six months! @Damaris – There are a couple of plugins out there for ExtJs. One of them focuses specifically on the grids. The other (I forget the name but google won’t!) is much broader but I don’t know if it deals with the. Like the link you provided, I took the approach of writing one for myself. It’s a pretty straight foward mapping between ruby hashes and the corresponding json. ExtJs took a very nice hierarchical approach to their lib. I started by modeling their core Observable component (namespaced so it doesn’t conflict with scriptaculous) and then created the next layer of the ring by inheriting from that and adding the new attributes, and so on. I made pretty heavy use of class\_inheritable\_xxx (array, reader, etc) and a method\_missing trick similar to what Rails does to let content\_columns appear as valid accessors on ARec classes. The only reason I did this was so I could dynamically create the js necessary for each context, writing it all in Ruby but interacting with the client browser with js. 1. Yes, you can use whatever you like to populate the tree nodes. You can hand roll js or use any type of data source you like to build the nodes. Most of my trees use the “AsyncTreeNode” object for the root node which allows you to get the UI up quickly and then query the app for the nodes. 2. You can change the icon for every node if you like. One of the attributes is the path to the icon. Of course you can set a default and then only override where/if necessary. On May 16, 12:14 pm, Damaris F. \