Posting Keyboard Events
Posting Keyboard Events
- Subject: Posting Keyboard Events
- From: Dave DeLong <email@hidden>
- Date: Fri, 05 Sep 2008 20:15:59 -0600
Hi everyone,
I'm having a heck of a time figuring out how to post keyboard events.
I've been working on this for a couple hours, googling everything I
can think of, but I'm still stuck.
First off, I'm aware of the functions:
CGPostKeyboardEvent()
CGEventCreateKeyboardEvent()
CGEventPost()
I've tried every combination of those that I can think of. For
modifier keys, it "seems" to work, but when it comes to actual letter
keys, it craps out on me. For example, if I try to do:
CGPostKeyboardEvent((CGCharCode)0, (CGKeyCode)56, true);
CGPostKeyboardEvent((CGCharCode)0, (CGKeyCode)6, true);
CGPostKeyboardEvent((CGCharCode)0, (CGKeyCode)6, false);
CGPostKeyboardEvent((CGCharCode)0, (CGKeyCode)56, false);
I'm expecting a capital "A" to get typed. All I get is a system beep
once I try to type the A. (Line 2)
So I tried a different way:
CGEventRef shiftDown = CGEventCreateKeyboardEvent(NULL,
(CGKeyCode)56, true);
CGEventRef shiftUp = CGEventCreateKeyboardEvent(NULL, (CGKeyCode)56,
false);
CGEventRef aDown = CGEventCreateKeyboardEvent(NULL, (CGKeyCode)6,
true);
CGEventRef aUp = CGEventCreateKeyboardEvent(NULL, (CGKeyCode)6, false);
CGEventPost(kCGHIDEventTap, shiftDown);
CGEventPost(kCGHIDEventTap, aDown);
CGEventPost(kCGHIDEventTap, aUp);
CGEventPost(kCGHIDEventTap, shiftUp);
Again the beep.
Then I found a reference to needing this beforehand:
CFRelease(CGEventCreate(NULL));
Guess what! I still get the beep.
SKIMMERS START READING HERE:
How on earth can I post system keyboard events (without getting a beep)?
Thanks a bunch!
Dave DeLong
ps - Mac OS X 10.5.4, Xcode 3.1, Mac Mini Core Duo
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