Extjs Pagging ToolBar Button Align Center

In Extjs Grid, Pagging Toolbar having Pagging Controll and Display Information for How many records are displaying.

After Hidding  display Info I would like align the Pagging Controlles in Center of the Pagging toolbar, and that will work when am doing resize also.

Changing the Layouts in Config, there is Layout  Pack it is working Fine , for this Issue
just and layout in pagging config as pack.

  xtype: 'pagingtoolbar',

        store: 'gridStore',    

        dock: 'bottom',

        layout: {

                pack: 'center'

            }