Hehe :)
So, ok, here's the deal: It's a bit indirect, but not overly complex :)
there's already a CF marker in FrequencyDisplayPlot.cc (that's the
actual plotting widget); search for CF in the source code. That one is
initialized in the constructor, and immediately hidden. What you'd need
to do is add a method that sets that marker's x coordinate, and add that
to both FrequencyDisplayPlot.cc and ~.h (under "slots:").
If I'm not mistaken, you'd then (Qt signal/slot style) connect() that
slot in freqdisplayform.cc (that's the container of the plot and things
like the optional settings forms etc). Then you'd extend the freq_sink_
{c,f}_impl's message handler to deal with messages specifying some
"marker_frequency" or so by emitting a Qt signal to freqdisplayform
(Tom, if you read this: am I right?). Especially for that last part,
I've got code lying around, so don't hesitate to ask for code snippets :)
That way, you can set frequency thread-safely through a message (you can
see the message ports in GRC if you enable them in the frequency sink's
properties dialog), and that will automatically work with python. You
can also add a setter method, and for the sake of simplicity, that might
just post a message to itself and let the message handler do its job, or
the other way around, let the message handler call the method and do the
emitting there.
Cheers,
Marcus
On 08.11.2015 22:13, David Hoelzer wrote:
> Thank you Marcus!
>
> I’m certainly capable and up to the task. I wanted to make sure I
> hadn’t missed something obvious or documented before I started
> reinventing the wheel.
>
> I wonder if the community agrees that this is something that would be
> useful. If so, I’d expose this so that it could be accessed from
> Python. If not, y’all won’t care what I do anyway. :)
>
> Thanks!
>
>> On Nov 8, 2015, at 12:00 PM, [email protected]
>> <mailto:[email protected]> wrote:
>>
>> Date: Sun, 8 Nov 2015 12:16:18 +0100
>> From: Marcus M?ller <[email protected]
>> <mailto:[email protected]>>
>> To: [email protected] <mailto:[email protected]>
>> Subject: Re: [Discuss-gnuradio] Drawing lines on WX or QT
>> instrumentation?
>> Message-ID: <[email protected]
>> <mailto:[email protected]>>
>> Content-Type: text/plain; charset="utf-8"
>>
>> 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
>
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> [email protected]
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________
Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
