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Re: [Discuss-gnuradio] QT GUI Flicker

From: Michael Dickens
Subject: Re: [Discuss-gnuradio] QT GUI Flicker
Date: Mon, 11 Feb 2019 09:44:06 -0500

Hi Ren - See < 
https://lists.gnu.org/archive/html/discuss-gnuradio/2018-10/msg00086.html >
The primary point of issue that I know of is that the default PyQt4 Qt4 
rendering configuration is "raster", which for some reason results in the GUI 
window flashing a lot & sometimes being unresponsive. The solution is to create 
or edit the file `~/.gnuradio/config.conf` and add (or tweak) the following:
style = native
or use `opengl` if that works. The default is "raster", which is the fastest 
and, generally, the most compatible, but for some reason this setting is borked 
on macOS Mojave 10.14. For me, "native" works but "opengl" doesn't. No idea why 
& it's not worth my time tracking down the issue since we're moving to Qt5 in 
the 3.8 release -- and thus away from Qt4 except for legacy support -- and Qt5 
should provide between rendering compatibility for OSX (both newer and older).

On Sun, Feb 10, 2019, at 11:16 PM, Ren Lie wrote:
> Hi, I get some trouble with QT GUI Flicker.
> Did anyone know how to fix it?
> I installed gnuradio from the MacPorts and run it in MacOS Mojave 10.14.2 .
> This version is gnuradio @ 
> +docs+grc+jack+log4cpp+logging+portaudio+qtgui+sdl+swig+uhd+wavelet+wxgui+zeromq
> QT GUI Flicker : https://imgur.com/a/Ilomw47
> Btw, the fuzzy text makes me annoying.
> Regards,
> Ren Lie

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