ExtJS-callParent

callParent( 
args ) :  Object
PROTECTED
Call the parent's overridden method. For example:

Ext.define('My.own.A', {
    constructor: function(test) {
        alert(test);
    }
});

Ext.define('My.own.B', {
    extend: 'My.own.A',

    constructor: function(test) {
        alert(test);

        this.callParent([test + 1]);
    }
});

Ext.define('My.own.C', {
    extend: 'My.own.B',

    constructor: function() {
        alert("Going to call parent's overriden constructor...");

        this.callParent(arguments);
    }
});

var a = new My.own.A(1); // alerts '1'
var b = new My.own.B(1); // alerts '1', then alerts '2'
var c = new My.own.C(2); // alerts "Going to call parent's overriden constructor..."
                         // alerts '2', then alerts '3'

원문 링크:http://docs.sencha.com/extjs/4.0.7/#!/api/Ext.Base-method-callParent