Method closeEvent

gui/qt/dockwidget.cpp:126–135

}

void DockWidget::closeEvent(QCloseEvent *event) {
    setFloating(true);
    setGeometry(QStyle::alignedRect(Qt::LeftToRight,
                                    Qt::AlignCenter,
                                    minimumSize(),
                                    qApp->screens().first()->availableGeometry()));
    emit closed();
    event->accept();
    QDockWidget::closeEvent(event);
}