用Qt隐藏不活动后的鼠标？

QApplication::setMouseTracking(true);

QTimer *timer = new QTimer(this);
timer->setInterval(1000); // 设置定时器间隔，单位为毫秒
connect(timer, SIGNAL(timeout()), this, SLOT(checkMouseActivity()));
timer->start();

void MainWindow::checkMouseActivity()
{
    if (QApplication::activeWindow() == this) {
        QCursor cursor = QCursor::pos();
        if (cursor == lastCursorPosition) {
            QCursor::setPos(-1, -1); // 隐藏鼠标
        } else {
            lastCursorPosition = cursor;
        }
    }
}