Qt: how to intercept the event "mouse cursor is on the scroll bar"?

Question

Qt

I am working with an editable table, and the task arose: to ensure that those elements that can be edited have a different cursor. Is the mouse pointer gone? — return the standard cursor. Moved to title? is also standard. While I came across such a task: when the cursor is hovering over the scroll bar, the cursor remains a caret.
It is necessary either to intercept the "cursor left the client area" event, or to work with the cursor in some other way than QWidget::setCursor.

Answer 1

For most components, you can replace the scrollbars with your own. You can do anything with them.

Answer 2

mouseMoveEvent()
{
underMouse()
}
or explicitly check if the coordinates where the cursor is