StackOverflow2013

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19611132
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2013-10-26T20:00:07.737
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2013-10-26T19:48:01.870
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2013-10-26T20:00:07.737
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Here's how to setup the event listener <pre><code>CFMachPortRef eventTap = CGEventTapCreate(kCGHIDEventTap, kCGHeadInsertEventTap, kCGEventTapOptionDefault, CGEventMaskBit(kCGEventKeyDown), &KeyDownCallback, NULL); CFRunLoopSourceRef runLoopSource = CFMachPortCreateRunLoopSource(NULL, eventTap, 0); CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, kCFRunLoopCommonModes); CFRelease(runLoopSource); CGEventTapEnable(eventTap, true); </code></pre> And then here is the "callback": <pre><code>static CGEventRef KeyDownCallback(CGEventTapProxy proxy, CGEventType type, CGEventRef event, void *refcon) { /* Do something with the event */ NSEvent *e = [NSEvent eventWithCGEvent:event]; return event; } </code></pre> on the parsed NSEvent, there are the <code>modifierFlags</code> and <code>keyCode</code> properties. <code>keyCode</code> is the code of the key that was pressed, and <code>modifierFlags</code> is the different modifiers that were pressed (Shift, Alt/Option, Command, etc). Simply <code>return NULL;</code> in the <code>KeyDownCallback</code> method to stop the event from propogating. Note: there seems to be an issue with the event tap timing out, to solve this problem you can 'reset' the event tap. In the <code>KeyDownCallback</code> method, check if the <code>CGEventType type</code> is <code>kCGEventTapDisabledByTimeout</code> like so: <pre><code>if (type == kCGEventTapDisabledByTimeout) { /* Reset eventTap */ return NULL; } </code></pre> and where <code>Reset eventTap</code> is, execute the setup of the event listener above again.
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1. POIntercept/Disable keyboard shortcuts (ex. CMD+q)
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1. PTAnswer
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1. USehftwelve
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1. USehftwelve
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1. POIntercept/Disable keyboard shortcuts (ex. CMD+q)
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