How to test proximity to the outline of a QGraphicsPathItem?

I'm trying to test whether a given point开发者_StackOverflow社区 (x, y) is located on or close to the outline of a QGraphicsPathItem.

Using QGraphicsItem.contains() or .collidesWithItem() / Path() will not do: those also return True if the point is contained within the area on the interior of the path, while I want to test only for points on the outline. How can I accomplish that?

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After posting the question I found the following solution:

    path = QPainterPath(...)   # Path we are testing against
    point = QPointF(...)       # Current position

    stroker = QPainterPathStroker()
    stroker.setWidth(10)        # Distance which we consider "on" the path 
    stroke = stroker.createStroke(path)

    if stroke.contains(point):
        # point is on path