I'm trying to create a simple login window with the very common 'Remember me' functionality. The login validation is done AJAX style, thus the browser won't remember my input.

My approach is to use the built-in state functionality, but how to use it confuses me.

Ext.state.Manager.setProvider(new Ext.state.CookieProvider({
    expires: new Date(new Date().getTime()+(1000*60*60*24*7)), //7 days from now
}));

...

{
    xtype: 'textfield',
    fieldLabel: 'User name',
    id: 'txt-username',
    stateful: true,
    stateId: 'username'
}, {
    xtype: 'textfield',
    fieldLabel: 'Password',
    id: 'txt-password',
    inputType: 'password',
    stateful: true,
    stateId: 'password'
}, {
    xtype: 'button',
    text: 'Validate',
    stateEvents: 'click'
}

I know I have to implement the getState method, but on what component (my guess is on the two textfields)? Another thing I fail to realize is, how is my click event on the button connected to the state properties of my textfields?