The code nows registers all multitouch devices, so if you Magic Mouse…

… is connected, it will accept the 1 tap 3 fingers middle click

main.m

@@ -35,6 +35,7 @@
 MTDeviceRef MTDeviceCreateDefault();
 void MTRegisterContactFrameCallback(MTDeviceRef, MTContactCallbackFunction);
 void MTDeviceStart(MTDeviceRef);
+CFMutableArrayRef MTDeviceCreateList(void); //returns a CFMutableArrayRef array of all multitouch devices
 
 BOOL maybeMiddleClick;
 NSDate *touchStartTime;
@@ -119,10 +120,17 @@ int main(int argc, char *argv[]) {
  [NSApplication sharedApplication];
 
 
- //register a callback to get raw touch data
- dev = MTDeviceCreateDefault();
- MTRegisterContactFrameCallback(dev, callback);
- MTDeviceStart(dev);
+ //Get list of all multi touch devices
+ NSMutableArray* deviceList = (NSMutableArray*)MTDeviceCreateList(); //grab our device list
+
+
+ //Iterate and register callbacks for multitouch devices.
+ for(int i = 0; i<[deviceList count]; i++) //iterate available devices
+ {
+ MTRegisterContactFrameCallback((MTDeviceRef)[deviceList objectAtIndex:i], callback); //assign callback for device
+ MTDeviceStart((MTDeviceRef)[deviceList objectAtIndex:i]); //start sending events
+ }
+
 
  //register a callback to know when osx come back from sleep
  WakeObserver *wo = [[WakeObserver alloc] init];