QTabWidget and initial focus

Hi,

I have a tabwidget designed in qtdesigner, with several tabs, each tab has several textboxes.
When the widget is shown, I can navigate the tabs, and Qt remembers for every tab which textbox is focussed.

Except on startup - here I can only put one of all the textboxes of all tabs as initial focus.
I would prefer to focus any / the first of the textboxes for every tab when the user first opens a tab.

Is there a good way? I could probably listen for tab change events and if the tab is opened for the first time, set focus manually.
But I am thinking I might have missed something easier in QtCreator Designer.
Is there by any chance a focus-order for every tab individually or something?