ExtJS 4 - use one function with grid dblclick and buttonclick when one row is selected

controller.js

init: function() {
	this.control({
		'grid': {
			itemdblclick: this.editRow
		},
		'grid button[action=edit]': {
			'click': function( element, event ) {
				var grid = element.findParentByType( 'grid' );
				var record = grid.getSelectionModel().getSelection()[0];
				if( typeof record !== 'undefined' ) {
					this.editRow( grid, record );
				}
			}
		}
	});
}