QScrollbar on mouse hover

[Cobra91151]

Hello! I want to change width of QScrollbar on mouse hover. Any ideas how to implement this?

[dheerendra]

You can handle mouseMoveEvent and change the size of your scrollBar accordingly.

1. Create your CustomScrollBar and handle the mouseTracking & MouseMove.
2. Handle mouseEvents in parent object of your scrollBar object and resize accordingly.
3. You can use eventFilter also.

[Cobra91151]

I want to apply width to all QScrollBars on hover in application. What about setting a stylesheet?

I have tried to use eventFilter:

qApp->installEventFilter(this);

bool Test::eventFilter(QObject *object, QEvent *event)
{
    qDebug() << "Event";

    if (event->type() == QEvent::Scroll) {
        QScrollEvent *scrollEvent = static_cast<QScrollEvent*>(event);
        if (scrollEvent->scrollState() == QScrollEvent::Enter) {
            this->setStyleSheet("QScrollBar:vertical {width: 20px;}");
        }

        if (scrollEvent->scrollState() == QScrollEvent::Leave) {
            this->setStyleSheet("QScrollBar:vertical {width: 12px;}");
        }
    }

    return QObject::eventFilter(object, event);
}

Event seems working but not change QScrollBar width on mouse hover. What I am doing wrong? Thanks in advance.

[Cobra91151]

I have figured it out and now it works. I post code here, so others can find a solution.

Code:

qApp->installEventFilter(this);

bool Test::eventFilter(QObject *object, QEvent *event)
{
    if (event->type() == QEvent::Enter) {
        qDebug() << "Enter";
        this->setStyleSheet("Your style here");
    }

    if (event->type() == QEvent::Leave) {
        qDebug() << "Leave";
        this->setStyleSheet("Your style here");
    }

    return QObject::eventFilter(object, event);
}