I am using xtype: 'boxselect' instead of xtype: 'textfield'. Because, we required boxselect. We required all events for boxselect. Mainly we need the events for
1) selecting item from the box.
2) After selected the item values are going to text box. But, while clicking close button from the text box we have to do some action.
This control is look like text box (with boxselect).