Easily and (thread/memory) safely consume global OS X multitouch (trackpad, Magic Mouse) events.

Installation

Manually

Note: Requires ARC, and Mac OS 10.8+

Using Framework

• Open the M5MultitouchSupport/M5MultitouchSupport.xcodeproj project, and build the default target.
• Add the resulting Products/M5MultitouchSupport.framework to your project.
• Add /System/Library/PrivateFrameworks/MultitouchSupport.framework to your project.

Using Source Files

• Drag the M5MultitouchSupport/M5MultitouchSupport folder into your project.
• Add /System/Library/PrivateFrameworks/MultitouchSupport.framework to your project.

Usage

Using M5MultitouchSupport in your app or framework is as simple as...

#import <M5MultitouchSupport.h>

Using Blocks

[M5MultitouchManager.sharedManager addListenerWithCallback:^(M5MultitouchEvent *event) {
  NSLog(event.description);

  /*
  Touches: (
    "ID: 3, State: 4 (Touching), Position: [0.251363, 0.475246], Velocity: [0.009912, -0.003619], Minor Axis: 8.160000, Major Axis: 9.920000, Angle: 1.911052, Size: 0.750000",
    "ID: 6, State: 4 (Touching), Position: [0.618595, 0.839751], Velocity: [-0.007434, -0.014476], Minor Axis: 8.230000, Major Axis: 9.220000, Angle: 1.570796, Size: 0.625000",
    "ID: 8, State: 4 (Touching), Position: [0.410051, 0.792415], Velocity: [0.008673, 0.018095], Minor Axis: 7.660000, Major Axis: 8.890000, Angle: 1.570796, Size: 0.628906"
  ), Device ID: 25381376, Frame ID: 1435, Timestamp: 3827.383000
  */
}];

Note: Multitouch event processing happens on a separate thread, but your listener will be passed events on the thread it was created (or the main thread if the original thread ever stops).

Using Targets/Selectors

[M5MultitouchManager.sharedManager addListenerWithTarget:self 
                                                selector:@selector(handleMultitouchEvent:)];

- (void)handleMultitouchEvent:(M5MultitouchEvent *)event {
    NSLog(event.description);
}

Note: Only a weak reference is held to the target, and M5MultitouchManager will safely remove the listener if that reference zeroes out.

Managing Listeners

M5MultitouchListener *listener = [M5MultitouchManager.sharedManager addListenerWith...

listener.listening = NO; 
//Listener will stop receiving events until set to YES

[M5MultitouchManager.sharedManager removeListener:listener]; 
//Will stop/remove the listener altogether

Contributing to this project

If you have feature requests or bug reports, feel free to help out by sending pull requests or by creating new issues.

Credits

M5MultitouchSupport is brought to you by Mathew Huusko V and contributors to the project. If you're using M5MultitouchSupport in your project, attribution would be very appreciated.