Cocoa: Middle mouse click event (global) + gesture API?

Question

Are there any resources that might guide me in how to make my app respond to any type of mouse click that is not the left / right button? Globally, even when my app is not active.

And for magic mouse / trackpad, are there any frameworks or resources available to easily attach my code to a specific gesture?

Answer 1

You can find everything related to mouse events: https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/EventOverview/HandlingMouseEvents/HandlingMouseEvents.html

and trackpad events: https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/EventOverview/HandlingTouchEvents/HandlingTouchEvents.html#//apple_ref/doc/uid/10000060i-CH13-SW10

Here is a stack overflow link that has explanation for handling global events.

Answer 2

Here's a code example based on Shashank's (very helpful) answer.

NSEventMask eventMask = NSOtherMouseDownMask|NSOtherMouseUpMask;
[NSEvent addGlobalMonitorForEventsMatchingMask:eventMask
       handler:^(NSEvent *event) {
           if (event.type == NSOtherMouseDown) {
               NSLog(@"middle click down");
           } else if (event.type == NSOtherMouseUp) {
               NSLog(@"middle click up");
           }
       }];