How to highlight a menu item by program input

[horbi]

Hi,
I'm working on a piece of software (on Linux/X11), which uses Qt application menus with simulated keyboard inputs and no mouse.

Simulating keyboard inputs works with:

QKeyEvent keyEvent(QEvent::KeyPress,Qt::Key_Tab, Qt::NoModifier);
 	QWidget* pWidget = qApp->activeWindow()->focusWidget();
        	qApp->sendEvent(pWidget, &keyEvent);

QKeyEvent keyEvent(QEvent::KeyPress,Qt::Key_Tab, Qt::NoModifier);
 	QWidget* pWidget = qApp->activeWindow()->focusWidget();
        	qApp->sendEvent(pWidget, &keyEvent);

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… for tab input or:

QKeyEvent keyEvent(QEvent::KeyPress,Qt::Key_..., Qt::NoModifier);
 	QWidget* pWidget = qApp->activePopupWidget();
        	qApp->sendEvent(pWidget, &keyEvent);

QKeyEvent keyEvent(QEvent::KeyPress,Qt::Key_..., Qt::NoModifier);
 	QWidget* pWidget = qApp->activePopupWidget();
        	qApp->sendEvent(pWidget, &keyEvent);

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… for other keys

But I always have to use the mouse to get an initial highlighted menu item. I tried a lot of things to get this highlighted item by program input.
With Qmenu::exec() I succeded to open a popup menu but could not get a highlighted item there, so the simulated inputs have no effect.
What am I doing wrong?

[Dimanesson]

Have you tried to send the KeyRelease event, after sending the KeyPress? For example I used this when I've tried to highlight my QMenu like it's going in Windows:

void MainWindow::keyPressEvent(QKeyEvent* event)
{
	if(event->key() == Qt::Key_Alt)
	{
		if(menuBar()->isHidden())
		{
			menuBar()->show();
                        QKeyEvent altPress(QEvent::KeyPress, Qt::Key_Alt, Qt::NoModifier);
	                QKeyEvent altRelease(QEvent::KeyRelease, Qt::Key_Alt, Qt::NoModifier);
 
	                qApp->sendEvent(menuBar(), &altPress);
	                qApp->sendEvent(menuBar(), &altRelease);
		}
	}
}

void MainWindow::keyPressEvent(QKeyEvent* event)
{
	if(event->key() == Qt::Key_Alt)
	{
		if(menuBar()->isHidden())
		{
			menuBar()->show();
                        QKeyEvent altPress(QEvent::KeyPress, Qt::Key_Alt, Qt::NoModifier);
	                QKeyEvent altRelease(QEvent::KeyRelease, Qt::Key_Alt, Qt::NoModifier);

	                qApp->sendEvent(menuBar(), &altPress);
	                qApp->sendEvent(menuBar(), &altRelease);
		}
	}
}

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