Question

I have created a Window, and added a label. Now i want to access that label using query and set text to that label. How am i suppose to do it ? I need to change the Text of the label (firstlabel) using
Ext.ComponentQuery.query. Can someone help me please ?

Ext.define('ProjectExample.view.ex.FirstWin', {
    extend: 'Ext.window.Window',
    alias : 'widget.firstW',
    items: [
            xtype: 'panel',
            title: 'First Panel',
            items: [{
                xtype: 'label',
                name: 'firstlabel',
                text: 'THIS IS A LABEL'
                }]
    ];  
    var panelArr = Ext.ComponentQuery.query('panel');
});

Answer 1

You can do:

var label = Ext.ComponentQuery.query('window > panel > label')[0];
label.setText('new label text');

Here is an example: http://jsfiddle.net/dbrin/XuQg4/