Invert trackpad / mouse events in Cocoa

Question

I would like to invert the movements of the trackpad or mouse, so sliding up the descents to the screen and crawling will increase (these are just general cursor movements, not gestures). I got this to work using eventtaps and CGDisplayMoveCursorToPoint (), but the result is too large (since both events are being processed). Does anyone know an easier way to do this?

Answer 1

I would not try to change the events themselves - just interpret the received coordinates in different ways, multiplying the Y coordinate that you get in mouseMoved: by -1.

Answer 2

Do not reinvent the wheel .