Handling Alt-Tab. about sokol

[skejeton]

The unfocus workaround worked super well for all my projects, so this can be the reasonable fix users will need to implement.

[skejeton]

So, there's one solution is by detecting window unfocus to drop the key states.

[floooh]

Hmm yeah, I haven't been sure tbh whether it should be the responsibility of the user code to drop key presses that were stuck when the window loses focus, or whether sokol_app.h should do this automatically.

I'll try to have a look how GLFW handles this. It probably makes sense to copy their behaviour. It may be tricky on more esoteric platforms like the web though.

In general, listening for the events like UNFOCUSED is the correct workaround.

[floooh]

...on further thought, it's tricky to handle inside sokol_app.h I would basically need to remember any pressed key, and then send a KEY_UP event on unfocused (and probably other events like minimized). Since sokol_app.h input is event-based (and not polling-based), that doesn't quite fit int since in an event-driven API there isn't a relationship between different types of input events.

I keep rolling around the idea in my head to have a input-polling header which sits on top of sokol_app.h and which would keep track of input events and offer a simple polling API (which makes a lot more sense for games), and this the unfocused-fix would make a lot more sense such a polling-layer.