Paint event does not Rescale with label maximise

[ebsaith]

Using qt Creator

Created window with label
Uploads image to label
I set the the label to "expanding" so its size increases as window maximizes
The image is set to "scaled" -> also increases with label

Using QPainter I am able to draw points on image & lines between them.
The problem is Qpainter does not increase as image expands, Hence my
points then are not placed in the correct location where initially clicked.

Is there a Setting to change to scale the QPainter?
Or is there another work around it
#How?

Ideas most welcome

Thanks
Kind Regards