Get focus on current widget with Qt buttons

[QtVik]

I have two dock widgets say A and B.

widget A is a QGLWidget and widget B is QWidget.

I have few buttons in widget B.

When I click on buttons from widget B the focus is still on widget A or Widget A is active.

How to get the focus on widget B when the button is clicked ?

[QtVik]

@QtVik this->setFocus() worked.