title: Extjs 4.1 - How to create item in initComponent function
body: <p>I have a panel like</p>
  
  <pre><code> var filterPanel = Ext.create('Ext.panel.Panel', {
          bodyPadding: 5,
          width: 300,
          myValue:5,
          title: 'Filters',
          initComponent: function() {
              this.items = [{
                  xtype: 'textfield',
                  value: this.myValue
              }];
              this.callParent();
          }
          renderTo: Ext.getBody()
      }); 
  </code></pre>
  
  <p>i try to create a item has <code>xtype: 'textfield'</code> and value is <code>myValue</code> of panel. But that's fail. </p>
  
  <p>How to do that thanks.
  Here is my example text <strong><a href="http://jsfiddle.net/4Cmuk/" rel="nofollow">http://jsfiddle.net/4Cmuk/</a></strong></p>