void QDockWidgetPrivate::updateButtons()
{
Q_Q(QDockWidget);
QDockWidgetLayout *dwLayout = qobject_cast<QDockWidgetLayout*>(layout);
QStyleOptionDockWidget opt;
q->initStyleOption(&opt);
bool customTitleBar = dwLayout->widgetForRole(QDockWidgetLayout::TitleBar) != 0;
bool nativeDeco = dwLayout->nativeWindowDeco();
bool hideButtons = nativeDeco || customTitleBar;
bool canClose = hasFeature(this, QDockWidget::DockWidgetClosable);
bool canFloat = hasFeature(this, QDockWidget::DockWidgetFloatable);
QAbstractButton *button
= qobject_cast<QAbstractButton*>(dwLayout->widgetForRole(QDockWidgetLayout::FloatButton));
button->setIcon(q->style()->standardIcon(QStyle::SP_TitleBarNormalButton, &opt, q));
button->setVisible(canFloat && !hideButtons);
#ifndef QT_NO_ACCESSIBILITY
button->setAccessibleName(QDockWidget::tr("Float"));
button->setAccessibleDescription(QDockWidget::tr("Undocks and re-attaches the dock widget"));
#endif
button
= qobject_cast <QAbstractButton*>(dwLayout->widgetForRole(QDockWidgetLayout::CloseButton));
button->setIcon(q->style()->standardIcon(QStyle::SP_TitleBarCloseButton, &opt, q));
button->setVisible(canClose && !hideButtons);
#ifndef QT_NO_ACCESSIBILITY
button->setAccessibleName(QDockWidget::tr("Close"));
button->setAccessibleDescription(QDockWidget::tr("Closes the dock widget"));
#endif
q->setAttribute(Qt::WA_ContentsPropagated,
(canFloat || canClose) && !hideButtons);
layout->invalidate();
}
