TreePanel with checkbox

[vin.ramesh]

Hi,

I am using extjs 3.1. I want use Ext.tree.TreePanel with multiple checkbox.
I got some reference this link http://crepitus.com/misc/ext/tree.html. Event i am getting some javaacript error.
Message: 'Ext.tree.TreePanel.prototype' is null or not an object
Line: 23
Char: 1
Code: 0
URI: http://localhost:8080/sirius/resourc...eeCheckNode.js


Message: Object doesn't support this property or method
Line: 17
Char: 4451
Code: 0
URI: http://localhost:8080/sirius/resource/js/ext-all_1_1.js

how to solve this error?.

[scottmartin]

Several comments:

Is this UX compatible with 3.1? There is no information concerning this.
Have you included these files in your uses?
Have you tried to contact the author?

We typically do not debug components from other sources.

Scott.

[vin.ramesh]

Hi ,

I am using this component Ext.tree.TreePanel. When you load Json String this line root.firstChild.expand(false), and this Ext.get('exp') is null or not an object. How to solve this problem.


root.expand(false, false, function() {
root.firstChild.expand(false);
Ext.get('cn').dom.value = tree.getChecked().join(',');
ser();
});


Ext.get('exp').on('click', function() {
tree.expandAll();
});



Thanks & Regards
Ramesh

[scottmartin]

What is 'cn' and 'exp'? DOM elements? Are you sure you should not be using Ext.getCmp()?

Scott.