doc_src_qt4-styles.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
#include <QStyleOptionFocusRect>
#include <QPainter>
 
class MyWidget : public QWidget
{
    Q_OBJECT
 
public:
    void paintEvent(QPaintEvent *event) override;
};
 
void snippet(const QStyleOptionFocusRect *option)
{
    //! [0]
    const QStyleOptionFocusRect *focusRectOption =
            qstyleoption_cast<const QStyleOptionFocusRect *>(option);
    if (focusRectOption) {
        //...
    }
    //! [0]
}
 
//! [1]
void MyWidget::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    //...
 
    QStyleOptionFocusRect option;
    option.initFrom(this);
    option.backgroundColor = palette().color(QPalette::Window);
 
    style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter,
                          this);
}
//! [1]