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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