[Discuss-gnuradio] Drawing lines on WX or QT instrumentation?

[David Hoelzer]

Please forgive me if this has been asked but I’ve searched extensively and not 
found anything.  I’ve also taken a pass through the code tree and nothing jumps 
out at me for this.

Is there anything exposed to Python from the WX or QT widgets that would allow 
me to lay vertical lines across an FFT or Waterfall?  I’ve built a 
multi-channel listener for use with my HackRF but I’m still hunting for a 
better way to display what’s “tuned” than populating arbitrary labels on the 
canvas.

Thanks!