Missing popup when hovering over FFT sink in gnuradio
<p>I've been watching Michael Ossmann's video guides on SDR on Great Scott Gadgets. In his videos, he hovers over the TTF sink which displays frequencies, power and TTF. If I do this on OS X, I don't get this yellow popup - besides the fact that my TTF sink looks differently.</p>

<p>Is this a setting in gnuradio, or might it be an OS X issue? I'm running gnuradio 3.7.9.1.</p>

<p>Screenshot from the video:
<a href="https://i.stack.imgur.com/pPV7w.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pPV7w.jpg" alt="His"></a></p>

<p>Screenshot from my application:
<a href="https://i.stack.imgur.com/55NF0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/55NF0.png" alt="Mine"></a></p>

<p><strong>EDIT:</strong> It appears that installing pyopengl solves this, as WX is falling back to "something". Install it using <strong>pip install pyopengl</strong> and restart gnuradio.</p>

<p><a href="https://i.stack.imgur.com/NHDJg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NHDJg.png" alt="With pyopengl"></a></p>