[Discuss-gnuradio] QT Gui FFT resizing Segfault (was: Re: Can I use uhd_fft or gnu-radio to display the spectrum with adjustable frequency resolution)

[Marcus Müller]

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So I couldn't resist, and the line that would actually call the
set_fft_size callback function correctly would've been
  <callback>set_fft_size(min(int($fftsize),4))</callback>

However, QT Gui spectacularly SEGFAULTs on me when doing that.
That actually happens in
line 123 of gr-qtgui/lib/freqdisplayform.cc :

  d_sizemenu->getActionFromSize(newsize)->setChecked(true);

which *might* be some relict from older times, but I can't really tell.
I hope someone more familiar with the qtgui infrastructure might chime in.

Greetings,
Marcus

On 04.06.2014 01:14, Marcus Müller wrote:
> Hi! On 04.06.2014 01:05, Marcus Müller wrote:
>> 
>> <callback>set_frequency_range($fc, $bw)</callback> to
>> gr-qtqui/grc/qtgui_freq_sink_x.xml where the other callbacks are 
>> defined and try if it works for you?
> Sorry, copied the wrong line. What I wanted to paste was: 
> <callback>set_fft_size($fftsize)</callback>
> 
> Greetings, Marcus
> 
> 
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