worked example of embedded browser calling back to Python with a list of bounding boxes onDomReady

[phrrngtn]

There are a couple of ways of doing this that come to mind:

1. handle the event in Python and then inject in the JavaScript from package up JS to extract out bounding boxes from HTML page  #4 and call something in JavaScript that calls back into Python via the web-channel (I assume it is reentrant i.e. we can call from Python -> JS -> Python?)
2. Inject in the JavaScript into a named/number world and then have the onDomReady event handled by that (JS) code which in turn would call a JS function which is dispatched to a Python slot.