我现在已经发现如何在OS X上以低层次挂钩/捕获键盘事件:如何在MacBook键盘上挂钩(hook)F7至F12和电源/弹出
从该答案中打印出代码:
如何(可能调整代码)识别哪个键盘负责特定事件?
使用情况是我计划使用一个外部键盘进行重新映射,同时保留我的内置 MacBook 键盘的原始映射。
编辑:
OSX HID Filter for Secondary Keyboard?
https://github.com/candera/khordr/blob/master/src/c/keygrab/hid-scratch.c
http://ianjoker.googlecode.com/svn/trunk/Joker/Joker/hid_test.cpp
http://www.cplusplusdevelop.com/72_17345226/
http://www.cocoabuilder.com/archive/cocoa/229902-which-keyboard-barcode-scanner-did-the-event-come-from.html
// compile and run from the commandline with:
// clang -framework coreFoundation -framework IOKit ./HID.c -o hid
// sudo ./hid
// This code works with the IOHID library to get notified of keys.
// Still haven't figured out how to truly intercept with
// substitution.
#include <IOKit/hid/IOHIDValue.h>
#include <IOKit/hid/IOHIDManager.h>
void myHIDKeyboardCallback( void* context, IOReturn result, void* sender, IOHIDValueRef value )
{
IOHIDElementRef elem = IOHIDValueGetElement( value );
if (IOHIDElementGetUsagePage(elem) != 0x07)
return;
uint32_t scancode = IOHIDElementGetUsage( elem );
if (scancode < 4 || scancode > 231)
return;
long pressed = IOHIDValueGetIntegerValue( value );
printf( "scancode: %d, pressed: %ld\n", scancode, pressed );
}
CFMutableDictionaryRef myCreateDeviceMatchingDictionary( UInt32 usagePage, UInt32 usage )
{
CFMutableDictionaryRef dict = CFDictionaryCreateMutable(
kCFAllocatorDefault, 0
, & kCFTypeDictionaryKeyCallBacks
, & kCFTypeDictionaryValueCallBacks );
if ( ! dict )
return NULL;
CFNumberRef pageNumberRef = CFNumberCreate( kCFAllocatorDefault, kCFNumberIntType, & usagePage );
if ( ! pageNumberRef ) {
CFRelease( dict );
return NULL;
}
CFDictionarySetValue( dict, CFSTR(kIOHIDDeviceUsagePageKey), pageNumberRef );
CFRelease( pageNumberRef );
CFNumberRef usageNumberRef = CFNumberCreate( kCFAllocatorDefault, kCFNumberIntType, & usage );
if ( ! usageNumberRef ) {
CFRelease( dict );
return NULL;
}
CFDictionarySetValue( dict, CFSTR(kIOHIDDeviceUsageKey), usageNumberRef );
CFRelease( usageNumberRef );
return dict;
}
int main(void)
{
IOHIDManagerRef hidManager = IOHIDManagerCreate( kCFAllocatorDefault, kIOHIDOptionsTypeNone );
CFArrayRef matches;
{
CFMutableDictionaryRef keyboard = myCreateDeviceMatchingDictionary( 0x01, 6 );
CFMutableDictionaryRef keypad = myCreateDeviceMatchingDictionary( 0x01, 7 );
CFMutableDictionaryRef matchesList[] = { keyboard, keypad };
matches = CFArrayCreate( kCFAllocatorDefault, (const void **)matchesList, 2, NULL );
}
IOHIDManagerSetDeviceMatchingMultiple( hidManager, matches );
IOHIDManagerRegisterInputValueCallback( hidManager, myHIDKeyboardCallback, NULL );
IOHIDManagerScheduleWithRunLoop( hidManager, CFRunLoopGetMain(), kCFRunLoopDefaultMode );
IOHIDManagerOpen( hidManager, kIOHIDOptionsTypeNone );
CFRunLoopRun(); // spins
}
如何(可能调整代码)识别哪个键盘负责特定事件?
使用情况是我计划使用一个外部键盘进行重新映射,同时保留我的内置 MacBook 键盘的原始映射。
编辑:
OSX HID Filter for Secondary Keyboard?
https://github.com/candera/khordr/blob/master/src/c/keygrab/hid-scratch.c
http://ianjoker.googlecode.com/svn/trunk/Joker/Joker/hid_test.cpp
http://www.cplusplusdevelop.com/72_17345226/
http://www.cocoabuilder.com/archive/cocoa/229902-which-keyboard-barcode-scanner-did-the-event-come-from.html
IOHIDManagerRegisterInputValueCallback
,而我建议使用IOHIDDeviceRegisterInputValueCallback
- 这是微妙但重要的区别。我将在答案中更新有关HID设备枚举的更多详细信息。 - pmdjIOHIDManagerRegisterInputValueCallback
)设置,sender
将是HID管理器的引用。但实际上,每个键盘的报告都不一样,这似乎暗示了不同的情况,因为只有一个管理器。这让我怀疑是否真的需要为特定设备设置回调函数。 - P i