Comments on: The Hottest ExtJS 3.0 Feature You’ve Never Heard About

By: uberVU - social comments

uberVU - social comments — Tue, 24 Nov 2009 12:04:27 +0000

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This post was mentioned on Twitter by tdgi: #ExtJS TOTD: Learn about the ‘ref’ config property from @VinylFox http://bit.ly/UCY4j...

By: Shea Frederick

Shea Frederick — Mon, 19 Oct 2009 13:20:33 +0000

How exactly did you come to this conclusion?

By: Shea Frederick

Shea Frederick — Mon, 19 Oct 2009 13:20:07 +0000

I agree, that factor definitely limits their use. I still use them quite often though, mostly for user interactions that I know wont happen till the UI has been rendered.

By: Edoardo Marcora

Edoardo Marcora — Sat, 17 Oct 2009 13:24:28 +0000

The fact that “refs” are set after rendering the component makes it of limited use. It would be a great tool if “refs” were set when a component is first instantiated, before rendering and everything else. I ended not using them to not constantly worrying about whether a component was rendered or not before using them.

By: Bruno Tavares

Bruno Tavares — Thu, 01 Oct 2009 19:07:45 +0000

Ext ties references using the new ref config. but the references are never deallocated. It would be better if Ext could store the ref’s and on onDestroy method, deallocate.

I’m just wondering if all this references could end up on a big memory leak…

By: Edoardo Marcora

Edoardo Marcora — Tue, 11 Aug 2009 11:52:04 +0000

I am trying to cleanup my code using this ‘ref’ new trick but I am getting undefined references. I have a viewport containing various panels. Each panel has a ref config option as such ref:’../name_of_panel’

If I put this.name_of_panel in the afterRender of the viewport I get back undefined… am I missing something here (I am sure I am doing something ridiculously stupid)?

Cheers,

Dado

By: David

David — Sat, 08 Aug 2009 23:42:31 +0000

Any plans to update your book for Ext 3?

By: Shea Frederick

Shea Frederick — Sat, 18 Jul 2009 02:36:13 +0000

Your absolutely correct Jesse, assuming you would be using the same panel+toolbar setup over and over again, then creating a pre-configured panel like this would be very helpful to centralize and reduce code.

By: Jesse Dhillon

Jesse Dhillon — Fri, 17 Jul 2009 23:14:34 +0000

You might extend a component if you used the same Panel+Toolbar in several different places, and wanted each instance to be identical, or at least start with identical basic config options.

By: chalu

chalu — Fri, 17 Jul 2009 09:18:55 +0000

Great post man. Ext is just great