If you use Qt it will use your system theme and colours no matter which OS you run your app on, unless you (the dev) overrides the style manually. I'd believe that's the case for wxWidgets too.
Re:No Config for Old Men
by PaulDavisThe1st on Sunday November 29, 2020 @10:53AM
(#25245832)
It's not about Qt's ability to pick up system theme & colors (although not also that the configurability mentioned in TFA goes somewhat beyond what is typically offered by modern desktop environments).
It's about whether or not the application uses custom elements (or even just puts everything in a Canvas and draws everything itself).
Re:No Config for Old Men
by smallstepforman on Saturday November 28, 2020 @09:24PM
(#25242454)
A platform native video editor (no cross platform capability), which uses native GUI toolkit would look something like this:
https://discuss.haiku-os.org/uploads/default/original/2X/9/9...
All the visual effects software I use have light and dark modes.
Video editing, music creation tools almost never used "the standard platform GUI toolkit" (even Apple has/had their own internal kit used for apps like Logic).
It also stopped being true (or became less true) when cross-platform development became important to some developers and some users, meaning that deeply integrating your application with whatever system a particular platform had was less important than making sure it ran reasonably consistently across platforms.