如何在Qt中实现QHoverEvent？

class CustomWidget : public QWidget {
    Q_OBJECT
public:
    CustomWidget(QWidget *parent = nullptr);
    ~CustomWidget();

protected:
    void mouseMoveEvent(QMouseEvent *event) override;
    bool event(QEvent *event) override;
};

void CustomWidget::mouseMoveEvent(QMouseEvent *event) {
    QPoint pos = event->pos();
    QHoverEvent hoverEvent(QEvent::HoverEnter, pos, pos);
    QApplication::sendEvent(this, &hoverEvent);
}

bool CustomWidget::event(QEvent *event) {
    if (event->type() == QEvent::HoverEnter || event->type() == QEvent::HoverMove) {
        QHoverEvent *hoverEvent = static_cast<QHoverEvent *>(event);
        QPoint pos = hoverEvent->pos();
        // 处理QHoverEvent事件，例如改变鼠标指针、显示提示信息等
        return true;
    }
    return QWidget::event(event);
}