To answer my own question.
The problem was in the key code generating code around this part. I've been
using a bridged CFString to map strings to key codes.
Turns out, that I did try to map even special keys via string lookup with only
1 character. This is one of those bugs where you think why did it work in the
first place, but well. My guess is some allocation problems with tab being more
than one character and in the end resulting in some mangled key codes.
Removing the double-lookup cleared the issue.
On 02 Dec 2014, at 20:50, Michael Starke
<michael.sta...@hicknhack-software.com> wrote:
> Hello list,
>
> if this topic should be posted elsewhere, I'll gladly ask the question there.
>
> My application send keyboard events to the system to simulate copy/paste and
> other sorts of behaviour.
> This works well as far as I can tell, but I'm running into a hiccup.
>
> The code that sends events is this (more or less as you'd expect)
>
> My current setup is 10.10 SDK, 10.8 deployment target and the described
> misbehaviour is observable unter 10.9.
>
> - (void)sendPressKey:(CGKeyCode)keyCode modifierFlags:(CGEventFlags)flags {
>
> CGEventSourceRef eventSource =
> CGEventSourceCreate(kCGEventSourceStatePrivate);
> if(NULL == eventSource) {
> return; // We could not create our own source, abort!
> }
> CGEventRef pressKey = CGEventCreateKeyboardEvent (eventSource, keyCode, YES);
> CGEventRef releaseKey = CGEventCreateKeyboardEvent (eventSource, keyCode,
> NO);
>
> /* The modifer Masks might be set, reset them */
> CGEventSetFlags(pressKey,0);
> CGEventSetFlags(releaseKey, 0);
> /* Set the modifiers to the ones we want */
> CGEventSetFlags(pressKey,flags);
> CGEventSetFlags(releaseKey, flags);
>
> /* Send the event */
> NSLog(@"Seding %@", self);
> CGEventPost(kCGHIDEventTap, pressKey);
> usleep(0.05 * NSEC_PER_MSEC);
> CGEventPost(kCGHIDEventTap, releaseKey);
>
> CFRelease(pressKey);
> CFRelease(releaseKey);
> CFRelease(eventSource);
> }
>
> This works as expected when run in debug mode. But when I compile for release
> and run, all the key codes work except Tab.
> If Tab should be sent, I see a key code 0x5f being recorded. In debug the Tab
> correctly gets sent as 0x30. My code always creates the keyboard event with
> the correct modifiers (none) and key code for tab (0x30), so the code does
> not change in debug or release but I've no clue, why I see this behaviour.
> Even more so, I cannot pin it down why only in release.
>
> Any suggestion as to why this is happening is highly appreciated.
>
> Regarding the sleep in there, this was added by a contributor to make it wokr
> under Yosemite.
___m i c h a e l s t a r k e____
geschäftsführer
HicknHack Software GmbH
www.hicknhack-software.com
___k o n t a k t____
+49 (170) 3686136
cont...@hicknhack.com
___H i c k n H a c k S o f t w a r e G m b H____
geschäftsführer - maik lathan | andreas reischuck | michael starke
bayreuther straße 32
01187 dresden
amtsgericht dresden HRB 30351
sitz - dresden
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