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//! [0]

const QStyleOptionFocusRect *focusRectOption =

        qstyleoption_cast<const QStyleOptionFocusRect *>(option);

if (focusRectOption) {

    ...

}

//! [0]

//! [1]

void MyWidget::paintEvent(QPaintEvent *event)

{

    QPainter painter(this);

    ...

    QStyleOptionFocusRect option(1);

    option.init(this);

    option.backgroundColor = palette().color(QPalette::Window);

    style().drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter,

                          this);

}

//! [1]

//! [2]

void drawControl(ControlElement element,

                 QPainter *painter,

                 const QWidget *widget,

                 const QRect &rect,

                 const QColorGroup &colorGroup,

                 SFlags how = Style_Default,

                 const QStyleOption &option = QStyleOption::Default) const;

//! [2]

//! [3]

void drawControl(ControlElement element,

                 const QStyleOption *option,

                 QPainter *painter,

                 const QWidget *widget = 0) const;

//! [3]