Focus on TextField inside of Tab

Hi all,

I have a TabSheet with two Tabs inside Window. Both of Tabs have VerticalLayout and some TextFields inside. What I want is to focus on the first TextField inside the first Tab when the Window shows up. What I was trying to do was sth like :

firstTab.setDefaultFocusComponent(firstField);
myTabSheet.setSelectedTab(firstTab);
firstField.focus();

but the problem is it works like: when the Window is openned, there's no focus (or the focus on the first tab, I acctually don't know) and then when I press TAB two times then I have focus on the first first inside the first Tab. 
Also when I change Tab by clicking on the second Tab, and go back to the first Tab I have what I want : focus on the first field. 
What can I do, to set focus on the first field inside first Tab when the Window appears ? 

Thanks all, regards

Hi Dominik,

I had the same issue you had and I couldn't solve. It's weird that if we change to tab 1 and then tab 2, we get the behavior we want. 

TextField firstField = new TextField();

                VerticalLayout firstTab = new VerticalLayout(firstField,
                        new TextField());
                firstTab.setCaption("First");
                VerticalLayout secondTab = new VerticalLayout();
                secondTab.setCaption("Second");

                TabSheet tabSheet = new TabSheet(firstTab, secondTab);
                tabSheet.setImmediate(true);
                tabSheet.getTab(0).setDefaultFocusComponent(firstField);

                Window window = new Window();
                window.setContent(tabSheet);
                window.setSizeFull();

                UI.getCurrent().addWindow(window);

             [b]   tabSheet.setSelectedTab(1);
                tabSheet.setSelectedTab(0);[/b]