QtGraphs LineSeries onClicked signal gives integer coordinates?

[FishBoneEK]

Hello!
Just made a little demo on QtGraphs LineSeries, but the onClicked signal gives integer coordinates?
E.g. it gives QPoint(2, 3) instead of float coordinates.
It means this onClicked signal can't be combined with other functions, like find to get the point index after the user clicked a point.

TBO I even don't know what's the use of it if it's integer.

P.S. I think it would be nice if there's a fuzzyFind function, e.g. user clicks at a place a bit away from a point (instead of ON the point), and fuzzyFind gets the point index. It would save efforts for the user.
Thanks!