void MWindow::paintEvent(QPaintEvent *event)
{
    Q_D(MWindow);
#ifdef M_USE_OPENGL
    if (!MApplication::softwareRendering()) {
        MGLES2Renderer::activate(d->glContext);
    }
#endif // M_USE_OPENGL
    if (d->beforeFirstPaintEvent) {
        d->beforeFirstPaintEvent = false;
        d->disableAutomaticBackgroundRepainting();
    }

    // FIXME: disabled for the meego graphicssystem right now until we have a solution for NB#205680
    if (!isOnDisplay() && !MGraphicsSystemHelper::isRunningMeeGoGraphicsSystem()) {
        // we allow some paint events when we are not visible as we might have a race between
        // the visibility information and the paint events
        if (d->invisiblePaintCounter < d->allowedPaintEventsWhenInvisible) {
            mDebug("MWindow::paintEvent") << "Application is not visible. Paint event allowed nevertheless.";
            ++d->invisiblePaintCounter;
        } else {
            mWarning("MWindow::paintEvent") << "Application is not visible. Paint event discarded. Make sure the application does not paint in the first place.";
            event->accept();
            d->discardedPaintEvent = true;
            return;
        }
    }

    if (isInSwitcher()) {
        if (!d->timeSinceLastPaintInSwitcher.isValid()) {
            d->timeSinceLastPaintInSwitcher.start();
            d->updateIsPending = false;
        } else {
            const int maxFpsInSwitcher = 5;
            const int minDelay = 1000. / maxFpsInSwitcher;
            qint64 msSinceLastPaint = d->timeSinceLastPaintInSwitcher.elapsed();
            if (msSinceLastPaint < minDelay) {
                event->accept();
                if (!d->updateIsPending) {
                    // trigger a new paint event as otherwise the screen may not be up to date
                    QTimer::singleShot(minDelay, viewport(), SLOT(update()));
                    d->updateIsPending = true;
                }
                return;
            } else {
                d->timeSinceLastPaintInSwitcher.restart();
                d->updateIsPending = false;
            }
        }
    }

    QGraphicsView::paintEvent(event);
}