I'm looking for a fast and reliable method to monitor changes in some windows belonging to a application.
After I hit a hotkey I'd like a method to monitor those windows for a change in specific pixels, and if it detect any changes it should trigger an action (more specifically move that window to other coordinates).
I've got a copy of Keyboard Maestro, which could be certainly a help. Also GrabFS may help.
What's the best way to achieve my goals?