QMouseEvent always generates Qt::LeftButton events on Android, even on right mouse click

static Qt::MouseButtons m_buttons = Qt::NoButton;

...

static Qt::MouseButtons mapAndroidButtons(jint buttons)
{
    Qt::MouseButtons qbuttons;

    if (buttons & 0x00000001) // BUTTON_PRIMARY
        qbuttons |= Qt::LeftButton;

    if (buttons & 0x00000002) // BUTTON_SECONDARY
        qbuttons |= Qt::RightButton;

    if (buttons & 0x00000004) // BUTTON_TERTIARY
        qbuttons |= Qt::MiddleButton;

    if (buttons & 0x00000008) // BUTTON_BACK
        qbuttons |= Qt::BackButton;

    if (buttons & 0x00000010) // BUTTON_FORWARD
        qbuttons |= Qt::ForwardButton;

    if (buttons & 0x00000020) // BUTTON_STYLUS_PRIMARY
        qbuttons |= Qt::LeftButton;

    if (buttons & 0x00000040) // BUTTON_STYLUS_SECONDARY
        qbuttons |= Qt::RightButton;

    return qbuttons;
}

static void mouseDown(JNIEnv */*env*/, jobject /*thiz*/, jint /*winId*/, jint x, jint y, jint buttonState)
{
    if (m_ignoreMouseEvents)
        return;

    Qt::MouseButtons qbuttons = mapAndroidButtons(buttonState);
    Qt::MouseButtons changedButtons = qbuttons & ~m_buttons; // extract (newly) pressed button

    if (changedButtons == Qt::NoButton)
        return;

    m_buttons = qbuttons;

    QPoint globalPos(x,y);
    QWindow *tlw = topLevelWindowAt(globalPos);
    m_mouseGrabber = tlw;
    QPoint localPos = tlw ? (globalPos - tlw->position()) : globalPos;

    static_assert (sizeof(changedButtons) <= sizeof(uint), "Unexpected Qt::MouseButtons size");
    for (uint button = 0x1; (uint) changedButtons >= button; button <<= 1)
    {
        if (changedButtons & button)
            QWindowSystemInterface::handleMouseEvent(tlw, localPos, globalPos,
                                                     qbuttons,
                                                     (Qt::MouseButton) button, QEvent::MouseButtonPress);
    }
}

static void mouseUp(JNIEnv */*env*/, jobject /*thiz*/, jint /*winId*/, jint x, jint y, jint buttonState)
{
    Qt::MouseButtons qbuttons = mapAndroidButtons(buttonState);
    Qt::MouseButtons changedButtons = m_buttons & ~qbuttons; // extract (newly) released button

    if (changedButtons == Qt::NoButton)
      return;

    m_buttons = qbuttons;

    QPoint globalPos(x,y);
    QWindow *tlw = m_mouseGrabber.data();
    if (!tlw)
        tlw = topLevelWindowAt(globalPos);
    QPoint localPos = tlw ? (globalPos -tlw->position()) : globalPos;

    static_assert (sizeof(changedButtons) <= sizeof(uint), "Unexpected Qt::MouseButtons size");
    for (uint button = 0x1; (uint) changedButtons >= button; button <<= 1)
    {
        if (changedButtons & button)
            QWindowSystemInterface::handleMouseEvent(tlw, localPos, globalPos,
                                                     qbuttons,
                                                     (Qt::MouseButton) button, QEvent::MouseButtonRelease);
    }

    m_ignoreMouseEvents = false;
    m_mouseGrabber = 0;
}

    static JNINativeMethod methods[] = {
...
        {"mouseDown", "(IIII)V", (void *)mouseDown},
        {"mouseUp", "(IIII)V", (void *)mouseUp},
...
    };

static public boolean sendMouseEvent(MotionEvent event, int id)
{
    switch (event.getActionMasked()) {
        case MotionEvent.ACTION_UP:
            mouseUp(id, (int) event.getX(), (int) event.getY(), event.getButtonState());
            break;

        case MotionEvent.ACTION_DOWN:
            mouseDown(id, (int) event.getX(), (int) event.getY(), event.getButtonState());
            m_oldx = (int) event.getX();
            m_oldy = (int) event.getY();
            break;
...
}

...

// pointer methods
public static native void mouseDown(int winId, int x, int y, int buttonState);
public static native void mouseUp(int winId, int x, int y, int buttonState);
...