I have got the `tabpanel` - it's the `main` form (view).
In this `tabpanel` I define the different tabs - `xtype:'panel'`.

So, I have one `main`(controller) , `main` view and some tabs views.
The tab's views are referenced in `main` view.

I want to define listener of `activate` event of some child's `panel` in `main` controller.

How can I do that?

the `main` controller :

```
Ext.define('KP.controller.account.apartment.Main', {
    extend: 'Ext.app.Controller',

    views: ['account.apartment.Main',
        'account.apartment.Requisites'
    ],

    models: ['account.apartment.Requisites'
    ],
    stores: ['account.apartment.Requisites'
    ],

    init: function () {

    }
});

```

The `main` view:

```
Ext.define('KP.view.account.apartment.Main', {
    extend: 'Ext.window.Window',
    alias: 'widget.ApartmentData',

    height: 566,
    width: 950,
    activeItem: 0,
    layout: {
        type: 'fit'
    },
    autoShow: false,

    initComponent: function() {
        var me = this;

        Ext.applyIf(me, {            
            items: [
                {
                    xtype: 'tabpanel',
                    activeTab: 0,
                    deferredRender: true, 

                    items: [                        

                        {
                            xtype: 'RequisitesApartment'
                        }
                    ]
                }
            ]
        });

        me.callParent(arguments);
    }

});

```

The child `panel` RequisitesApartment (view):

```
Ext.define('KP.view.account.apartment.Requisites', {
    extend: 'Ext.panel.Panel',
    alias: 'widget.RequisitesApartment',

    id: 'panel_accountrequisites',
    height: 350,
    width: 1124,
    autoScroll: true,
    layout: {
        type: 'fit'
    },

    listeners: {
        activate: function () {           
               ....load data....
               ...this listeners I want to push in 'main' controller...            
        }
    },

    initComponent: function () {
        var me = this;

        var grid_store = Ext.create('KP.store.account.apartment.Requisites');

        Ext.applyIf(me, {
            dockedItems: [
                {
                    xtype: 'gridpanel',
                    height: 260,
                    autoScroll: true,
                    dock: 'bottom',
                    store: grid_store,
                    id: 'r_gridFlatParams',
                    forceFit: true,

                    columns: [
                        ...some columns....
                    ],
                    viewConfig: {
                }
            }
            ]
        });

        me.callParent(arguments);
    }
});

```