QToolButton *toolButton = new QToolButton; toolButton->setFocusPolicy(Qt::ClickFocus);
QToolButton *toolButton = new QToolButton; toolButton->setFocusPolicy(Qt::NoFocus);
QToolButton *toolButton = new QToolButton; toolButton->setFocusPolicy(Qt::StrongFocus);In this example, the setFocusPolicy function sets the focus policy to StrongFocus. This means that when the widget receives input, it accepts focus and focuses on the widget. In all three examples, the QToolButton class is used from the Qt package/library, and the setFocusPolicy function is called to set the desired focus policy for the widget.