I haven't checked LoginView, but I guess it will be a couple of text fields, a button with an attached event, maybe CSSLayout, and some javascript code for effe

I haven't checked LoginView, but I guess it will be a couple of text fields, a button with an attached event, maybe CSSLayout, and some javascript code for effects. Something you can easily get done quickly by following tutorials. PRO components are there you can get something fast with zero coding, but everything else is open source Vaadin.