QtQuick app fullscreen doesn't repaint itself after loosing focus

[PhaseMike]

Hello everybody,

I am working currently with Qt5.2.1, QtQuick and Visual Studio 2010 under Windows.

I have found an issue concerning the fullscreen with a QtQuick app.
The problem is the app doesn't repaint itself anymore (in fullscreen mode) when it loose the focus and get it back after.

I have tested on those platforms : Windows 7 64bits, Windows Vista 32bits and Windows 8.1.
It seem to happen on Windows 7 64bits and Windows Vista 32bits. And it seem to work under Windows 8.1.

Do you have an idea to resolve this issue ?

Thank you in advance.

[wysota]

It would be easier if you provided a minimal example reproducing the problem.

[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.