I create some QActions like this:

QActionGroup ag(this);
QAction* a = new QAction( ... );

a->setCheckable(true);
ag->addAction(a);

QAction* b = new QAction( ... );
b->setCheckable(true);
ag->addAction(b);

...

later on I create toolbars, where I add those actions

QToolBar* tb = new QToolBar("check", this);

tb->addAction(a);
tb->addAction(b);

but when I switch a toolbarbutton, nothing happens to respect of group behaviour of the other button.

Am I missing something, or are QActionGroup not intended to work with toolbars?