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

[Marcus Müller]

Hi David,

I don't think that this has been implemented; it's definitely not impossible, though!

So, the point is that the FrequencyDisplayForm [1] does have a d_marker_cf member which, as far as I can tell, is there, and can be set to a different color and en- and disabled. However,

• that functionality, as far as I can tell, isn't actually in use by the freq_sink[2], and
• there's no way to set the coordinate of that line (it's at x=0).
  

But, as mentioned, that'd be relatively easy to solve. Do you feel up to coding a bit of C++, or would you need help with that?

Cheers,
Marcus

[1] http://gnuradio.org/doc/doxygen/classFrequencyDisplayPlot.html
[2] http://gnuradio.org/doc/doxygen/classgr_1_1qtgui_1_1freq__sink__c.html

On 11/08/2015 02:37 AM, David Hoelzer wrote:

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!
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