WindowBuilderPro GwtJavaUI Composite and GWT UiBinder Composite

[Luc]

It's kind of newbie question..

I can't figure out how WindowBuilder manages panels in design view for
GWT Java UI and GWT UiBinder.
Everything seems fine when I follow the instructions in this tutorial
(http://code.google.com/javadevtools/wbpro/tutorials/
loginmanager.html), but when I try to do the same with UiBinder
(WindowBuilder > GWT Designer > GWT UiBinder > Composite) things're
getting complicated..
Adding title label and FlexTable into VerticalPanel is
straightforward. Then I should add some widgets onto FlexTable but I
can't. I don't understand why?
Moreover I've noticed that FlowPanel doesn't let to put Label and
another Label or TextBox in the same row, which for me is strange..

I would be grateful for any suggestions..

[Eric Clayberg]

The tutorial you are referring to is for GWT Java, not UiBinder.

FlexTables don't allow children in UiBinder, so you can't add them in the design view either.