如何防止Qscrollbar的箭头调用相同的函数两次？

connect(scrollBar, &QScrollBar::sliderPressed, this, &MyClass::handleScrollBarPress, Qt::UniqueConnection);

void MyClass::handleScrollBarPress()
{
    static bool isFunctionCalled = false;
    if (!isFunctionCalled) {
        // 执行函数逻辑
        isFunctionCalled = true;
    }
}

void MyScrollBar::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton) {
        // 执行函数逻辑
    }
    QScrollBar::mousePressEvent(event);
}