Comments on: xtype defined

By: joe

joe — Sun, 01 Aug 2010 11:49:45 +0000

The example line got broken of, I was just referencing the line from your post. Here is the rest of my comment:
[example line from above(xtype...)], how can I call i.e. getSelectionModel() on mygrid?

By: joe

joe — Sun, 01 Aug 2010 11:48:04 +0000

Very clear description, thanks.
What I am still wondering though, ow to i call a function on the lazyly instantiated object?
As by the above example ({xtype:\’mygrid\

By: Bulle Bas

Bulle Bas — Tue, 14 Jul 2009 23:32:27 +0000

ad 2. Yes I was mistaken, I read pre ext3 where you write pre ext2.

ad 3. Ghe don\’t get me wrong. I love extjs as well, and bought recently a license because I want to use this library. I only wonder how extjs1 worked then. Since the only way of greedy instantiation I can think of is something like the following

p = new SubPanel();
w = new Widget().registerAOnClickFunction(function (e) {p.show()}}

this is a waste indeed.
But why not simply

w = new Widget().registerAOnClickFunction(function (e) {new Panel.show()}}

There is no need to instantiate Panel beforehand, in global scope.

ad 4. It was just an example, definitely not Extjs. $ is (DOM) getElementById, the example I provide here is maybe clearer. Still not extjs, but it illustrates the concept.

By: Saki

Saki — Tue, 14 Jul 2009 20:31:40 +0000

1. Not necessarily. You can instantiate/render components when you need, the only difference is that pre-Ext-2.x doesn’t do it for you – you need to do it yourself.

2. Ext 3.x and Ext 2.x are conceptually same in this area.

3. No design mistake in Ext 2.x I know about. The reverse is true: Many ingenious concepts.

4. No idea what’s the line you posted does. What’s $? What .register does? Is it an Ext line?

By: Bulle Bas

Bulle Bas — Tue, 14 Jul 2009 10:17:34 +0000

Now, if you code such application in an before-Ext-2.x way you need to instantiate all objects in the application at the time of first page loading (application code first run).
How is this different from Ext 3? Was there a design mistake in Ext2. I am inclined to think that lazy loading is what you get normally. Like here:

$(\’id3\’).click.register(function(e) {new Panel().show()})

Just curious.

By: Saki

Saki — Sat, 27 Jun 2009 19:03:14 +0000

Thank you minamu1. I’m glad you like it.

By: minamu1

minamu1 — Sat, 27 Jun 2009 01:29:43 +0000

Simple, precise, and to the point…brilliant!
thanks

By: asdfasdf

asdfasdf — Sat, 30 May 2009 19:37:15 +0000

Finally, a simple explanation..

By: Jayashree

Jayashree — Fri, 17 Apr 2009 15:19:18 +0000

Great! thank you for the clarification.