void QtQuick2ApplicationViewer::mouseClick(QVariant x1, QVariant y1)
{
    float x = x1.toFloat();
    float y = y1.toFloat();
    qDebug() << "click @ " << x << "," << y;
    this->cursor().setPos(x, y);

    QMouseEvent pressEvent(QEvent::MouseButtonPress, QPointF(x, y),
                           Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
    QMouseEvent releaseEvent(QEvent::MouseButtonRelease, QPointF(x, y),
                           Qt::LeftButton, Qt::LeftButton, Qt::NoModifier);
    QGuiApplication::sendEvent(this, &pressEvent);
    QGuiApplication::sendEvent(this, &releaseEvent);
}