[pyqtgraph] Getting custom QGraphicsItem to display above AxisItems in plots?

[UP.]

Hi all,

I originally posted a question to Stackoverflow but unfortunately did not
get an answer so I hope it's ok to post here. (spent another day on this
and still cannot work it out - feeling dumb)

I modified the crosshair example to have little arrows but the arrows are
always hidden behind the AxisItems unless I reference the GraphicsScene in
QT. There is something in the pyqtgraph source code that makes the Axis
always have priority when drawing I guess... does anyone have any hints on
how to draw items on top of an axis correctly?

Thanks.


(original SO post was here :
https://stackoverflow.com/questions/52410731/drawing-and-displaying-objects-and-labels-over-the-axis-in-pyqtgraph-how-to-do)