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    <p>Another way would be to create a CGEventTap that captures mouse down events.<br> You then just have to remember the last event type and check that in one of your NSMenu delegate methods.<br> Here is some sample code:</p> <pre><code>CGEventRef MouseClickedEventCallback(CGEventTapProxy proxy, CGEventType type, CGEventRef event, void* refcon) { CGPoint location = CGEventGetLocation(event); switch (type) { case kCGEventLeftMouseDown: { NSLog(@"Left Mouse pressed at %@", NSStringFromPoint(NSPointFromCGPoint(location))); break; } case kCGEventRightMouseDown: { NSLog(@"Right Mouse pressed at %@", NSStringFromPoint(NSPointFromCGPoint(location))); break; } case kCGEventOtherMouseDown: { NSLog(@"Other Mouse pressed at %@", NSStringFromPoint(NSPointFromCGPoint(location))); break; } default: break; } return event; } - (void)applicationDidFinishLaunching:(NSNotification*)aNotification { CGEventMask eventMask = CGEventMaskBit(kCGEventLeftMouseDown)|CGEventMaskBit(kCGEventRightMouseDown)|CGEventMaskBit(kCGEventOtherMouseDown); CFMachPortRef eventTap = CGEventTapCreate(kCGSessionEventTap, kCGHeadInsertEventTap, 0, eventMask, MouseClickedEventCallback, NULL); CFRunLoopSourceRef runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, eventTap, 0); CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, kCFRunLoopCommonModes); CGEventTapEnable(eventTap, true); } </code></pre> <p>The <a href="http://developer.apple.com/library/mac/#documentation/Carbon/Reference/QuartzEventServicesRef/Reference/reference.html" rel="nofollow">Quartz Event Services docs</a> state that:</p> <blockquote> <p>Event taps receive key up and key down events if one of the following conditions is true:</p> <ul> <li>The current process is running as the root user. </li> <li>Access for assistive devices is enabled. In Mac OS X v10.4, you can enable this feature using System Preferences, Universal Access panel, Keyboard view.</li> </ul> </blockquote> <p>I double checked that and it seems that you really don't have to enable assistive devices to receive mouse events.</p> <p>But if <code>[[[NSApplication sharedApplication] currentEvent] buttonNumber]</code> does what you want, I'd definitely go with that. It's higher level and therefore less code.</p>
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    1. USThomas Zoechling
    1. USThomas Zoechling
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    1. COReally appreciate the help/code weichsel, it’s always good to see different approaches to the same problem. As you stated, the `[NSApplication sharedApplication]` approach is doing what I want, and is higher level, so I’ll go with it for now.
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      1. USDustin Senos
 

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