Function createOpacityIcon

gui/guiutils.cpp:330–356

}

QIcon createOpacityIcon(qreal opacity)
{
    QIcon opacityIcon;

    // Create a pixmap for each common icon size.
    for (int size : {16, 22, 24, 32, 48}) {
        QPixmap pixmap(QSize(size, size) * qApp->devicePixelRatio());
        pixmap.setDevicePixelRatio(qApp->devicePixelRatio());
        pixmap.fill(Qt::transparent);
        QPainter painter(&pixmap);
        painter.setPen(Qt::NoPen);
        painter.setBrush(qApp->palette().color(QPalette::Active, QPalette::WindowText));

        // Checkerboard pattern
        painter.drawRect(QRectF(QPoint(0, 0), QPoint(size, size) / 2));
        painter.drawRect(QRectF(QPoint(size, size) / 2, QPoint(size, size)));

        // Opacity
        painter.setOpacity(opacity);
        painter.drawRect(QRect(QPoint(0, 0), QPoint(size, size)));

        painter.end();
        opacityIcon.addPixmap(pixmap);
    }

    return opacityIcon;
}

}