+ (*i)->signal_expanded.connect(sigc::hide(sigc::mem_fun(root_layout, &GLtk::Layout::update)));
+ if(prev)
+ {
+ root_layout->add_constraint(**i, GLtk::Layout::RIGHT_OF, *prev, 0);
+ root_layout->add_constraint(**i, GLtk::Layout::COPY_HEIGHT, *prev);
+ }
+ prev = *i;