public Login() {
lookup();
setSizeFull();
Component loginForm = buildLoginForm();
loginForm.setSizeUndefined();
addComponent(loginForm);
setComponentAlignment(loginForm, Alignment.MIDDLE_CENTER);
}
private void showComponent(final Component component, final String name) {
final VerticalLayout layout = new VerticalLayout();
layout.setSizeUndefined();
layout.setMargin(true);
final Window window = new Window(name, layout);
window.setSizeUndefined();
component.setSizeUndefined();
window.addComponent(component);
getWindow().addWindow(window);
}