empty parameter list constructor - for usage by factory
create with ID parameter
add new tab by id and label string
add new tab by id and label string resource id
remove tab
select tab
get tab content widget by id
get currently set control widget
set new control widget
signal of tab change (e.g. by clicking on tab header)
Measure widget according to desired width and height constraints. (Step 1 of two phase layout).
Set widget rectangle to specified value and layout widget contents. (Step 2 of two phase layout).
make one of children (with specified ID) visible, for the rest, set visibility to otherChildrenVisibility
container for widgets controlled by TabControl