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.

Create your CustomScrollBar and handle the mouseTracking & MouseMove.
Handle mouseEvents in parent object of your scrollBar object and resize accordingly.
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);
}