I have created the QGraphicsView in the Qt dialog. Added some lines in the QGraphicsView. I want to highlight the line on mouse hover. here not getting Object of line on mouse hover to highlight.

bool QtdlUI::eventFilter(QObject* obj, QEvent* event)
{
    if (event->type() == QEvent::MouseMove)
    {
        QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);  
        QPointF Inpos = mouseEvent->scenePosition();
        QGraphicsItem* Graphicsit = Gscene->itemAt(Inpos, ui.graphicsView->transform());
    }
}

I tried above code but getting QGraphicsItem null.