+ Panel *by_panel = new Panel;
+ by_panel
+ ->Direction(Panel::VERTICAL);
+ Panel *val_panel = new Panel;
+ val_panel
+ ->Direction(Panel::VERTICAL);
+ Panel *tab_panel = new Panel;
+ tab_panel
+ ->Direction(Panel::HORIZONTAL)
+ ->Spacing(10.0f)
+ ->Add(by_panel)
+ ->Add(val_panel);