Menus misplaced if items added after aboutToShow() using RTL mode

If running an application in RTL mode and dynamicly adding QActions to a QMenu when aboutToShow() is emitted. The menu will be shown incorrectly shifted to the right.

Example code:

#include <QtGui>

class BorkedMenu: public QMenu
{
Q_OBJECT
public:
BorkedMenu( QWidget *parent): QMenu(parent)

{ connect(this, SIGNAL(aboutToShow()), this, SLOT(aboutToShow())); }

public slots:
void aboutToShow()

{ if (!actions().isEmpty()) return; addAction( new QAction("Today", parent() ) ); addAction( new QAction("Yesterday", parent() ) ); addAction( new QAction("A week ago", parent() ) ); }

};

#include "main.moc"

int main( int arc, char *argv[] )
{
QApplication app(arc, argv);
app.setLayoutDirection(Qt::RightToLeft);
QMainWindow *window = new QMainWindow;
QMenu *menu;

menu = window->menuBar()>addMenu( window>tr("&File") );
menu->addAction( new QAction("New", window) );
menu->addAction( new QAction("Open", window) );
menu->addAction( new QAction("Quit", window) );
menu = window->menuBar()>addMenu( window>tr("&Edit") );
menu->addAction( new QAction("Copy", window) );
menu->addAction( new QAction("Cut", window) );
menu->addAction( new QAction("Paste", window) );

// this menu will be borked
menu = new BorkedMenu( window );
menu->setTitle("&History");
window->menuBar()->addMenu(menu);

menu = window->menuBar()>addMenu( window>tr("&Help") );
menu->addAction( new QAction("About", window) );
QTextEdit *e = new QTextEdit( window );
e->setHtml(
"<p dir='ltr'>"
"To reproduce this bug, open the History menu. The first time you open the bookmark menu, it will "
"be shifted to the right. This is because the calculation of the position of the "
"menu is done before the <b>aboutToShow()</b> signal is emmited, but many applications "
"(KDE for example) will add QActions to the QMenu on a callback method connected to this "
"signal, which means a new location need to be computed.<br><br>"
"</p>"
);
window->setCentralWidget( e );
window->showMaximized();
window->show();

return app.exec();
}