framebuf: unix port: SDL window appears "inactive"

[crteensy]

OS: Ubuntu 16.04 LTS
When I create a FrameBuffer, a corresponding SDL window is created. However, it appears to be inactive or "grayed out" which is a bit annoying because colors appear different.

[pfalcon]

Thanks for the report, but I'm not sure what's being reported here. For me, it (SDL window?) doesn't appear to be "grayed out". You would need to explain better and/or provide steps to reproduce, screenshots, etc.

[crteensy]

Code to reproduce:

import framebuf
fb = framebuf.FrameBuffer(None, 400, 300, 0)

Here's a screenshot:

This is apparently a known issue with SDL on ubuntu:
https://stackoverflow.com/questions/18167542/sdl-window-seemingly-improperly-being-marked-unresponsive-by-os
I tried to apply the suggested fixes but since I never used SDL or usdl before I didn't succeed.

[pfalcon]

Please use framebuf/ex_framebuf.py for testing. Here's how it looks for me:

Nothing is ever grayed out. Window's close button doesn't work, that's expected. You need to go to console where you started the app, and press ctrl+c there.

I encourage you to try to implement the calls mentioned in the SO post yourself, if not, I'll look into that when I have time.

[pfalcon]

I'm using MATE on Ubuntu 18.04. But I believe initial version of the module was developed yet on 16.04, with MATE too of course.

[pfalcon]

Please use framebuf/ex_framebuf.py for testing.

LOL, it's not even committed. Thanks for looking into this - when someone else but yourself gives it a try, a lot of goofs are uncovered ;-).

It's now there, as framebuf/example.py

[pfalcon]

https://github.com/pfalcon/micropython-lib/blob/master/framebuf/example.py