QGuiApplication height of the window title bar

[solarisx]

Hi

I have s QGuiApplication. If it is shown Windowed, I need to know the height of the window title bar.
I found it for a QApplication

QApplication::style()->pixelMetric(QStyle::PM_TitleBarHeight);

but need it for a QGuiApplication with QML Content.

I need to know this, because if i switch my application from fullscreen to windowed the window is to high (about the height of the window titlebar)

Thanks in advance, greets solarisx