Double tap on button-it does not work

[Anastasia111]

Hi,
I'm new in sencha, I'm trying to call the function in double tap on a button but it does not work, with a single tap it's work, what's missing? Or maybe there is no double tap in Sencha ?

Can you help me?
Thanks

controller:

Ext.define('MyApp.controller.Register',
	{
		extend: 'MyApp.controller.Controller',
		requires: [
		],


		config:
		{


			views: ['Register'],


			refs:
			{
				view: 'register'
			},


			control:
			{
				view:
				{
					initialize: 'onInit',
					
				}
			}
		},


		onInit: function ()
		{
			var view = this.getView();
			this.getView().down('[name=register]').on('doubletap', this.onRegisterTapped, this);
		
		},


		onRegisterTapped: function ()
		{
			//
		}
	
	});

view:

Ext.define('MyApp.view.Register',
{
	extend: 'Ext.form.Panel',


	xtype: 'register',


	requires:
	[
	],


	config:
	{
		fullscreen: true,


		items:
		[
			{
				docked: 'top',
				xtype: 'fl-container',
				layout: 'hbox',
				items:
				[
					{
						xtype: 'button',
						name: 'register',
						text: 'Register',
						ui: 'confirm',
						margin: '0.2em',
						width: '5em'
					},
				]
	]}
}
});