QtQuick app fullscreen doesn't repaint itself after loosing focus

[PhaseMike]

The fullscreen is set by calling the showFullScreen() method of QQuickView class which is inherited from QWindow (http://qt-project.org/doc/qt-5.0/qtg...showFullScreen).

A minimal example of code :

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);
 
    QQuickView viewer;
    viewer.setSource("... a qml file ...");
    viewer.showFullScreen();
 
    return app.exec();
}

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QQuickView viewer;
    viewer.setSource("... a qml file ...");
    viewer.showFullScreen();

    return app.exec();
}

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When the app loose the focus (for example when doing Control + Escape) and it get the focus back after, the app doesn't repaint itself. The render is not updated anymore.