shellscript to check if window has focus, possible?
 

I'm playing a game through wine (fullscreen), when I alt-tab back to my ubuntu desktop, the resolution doesn't change back, but stays at the game resolution.

I'm currently using a shellscript that changes the resolution back to my origional resolution (using xrandr -s 0)

Is it possible to check which window has focus using a shellscript.
If the game doesn't have focus change resolution to my origional resolution.

maybe using xwininfo?

That doesn't seem to show any differences regarding focus, but thanks for pointing out the tool!
Kevin Barry

Okay, I should have checked... but I was looking at some other stuff I have around here today and 'xdotool' can identify the window which has focus.