Question

I’m using this code to check for scrolling:

scrollKeyMonitor = [NSEvent addLocalMonitorForEventsMatchingMask:NSScrollWheelMask handler:^(NSEvent *incomingEvent)
                    {
                        //printf("we are scrolling!");

                        return incomingEvent;

                    }];

How do I check the y values of the scroll to see if we are going up or down?

Thanks

Answer 1

You can set an initial position. Then test to see if the current position is lower / higher to determine if user is scrolling up or down. Then reset the initial position to the current position for the next movement.