smartgwt flowlayout

I need to do anything like this http://dashingdemo.herokuapp.com/sampletv.
In the role of the panels I use elements "Window",which have adjustable height and width.
http://www.smartclient.com/smartgwt/showcase/#portlet_width_portal_layout - it does not work as I need, http://www.smartclient.com/smartgwt/showcase/#effects_dd_effects - seems,but how to make what would not run one window to another and worked for some auto ordering ?