OOP question in Extjs

[Baron89]

Hi all,i want to call a function that defined in the other class like the code show below,how should i make it?

ClassA = Ext.extend(ClassAUi, {
    initComponent: function() {
        ClassA.superclass.initComponent.call(this);
        this.initActionHandler();
    },
    initActionHandler : function() {
     
     this.getAddBtn().on('click',this.onClickAddBtn, this);
     
    },
    onClickAddBtn : function(){
          //how can i call the function 'foo' that defined in classB?
   },
    getAddBtn : function(){
     
     return Ext.getCmp("classA.add");
    }
});
Ext.reg('ClassA',ClassA);

ClassB = Ext.extend(ClassBUi, {
    initComponent: function() {
        ClassB.superclass.initComponent.call(this);
        
    },
   foo : function(){
         //do something
    }
});
Ext.reg('ClassB',ClassB);

[jorgeluislay]

I think it was something with createDelegate()

Jay Garcia explain this in some of his videos, maybe it was in this one. Just take a look, is very interesannt too: click me!