Re: Basic event handling with core graphics

I am trying to handle events with core graphics and core fundation on mac os.

My code:

 #import 
    #import 
   
    static int counter = 0;
   
    CGEventRef myCGEventCallback(CGEventTapProxy proxy, CGEventType type, CGEventRef event, void *refcon) {
   
        printf("event 0x%i\n ", counter++);
   
        return event;
    }
   
   
    int main(int argc, const char * argv[]) {
   
   
        CFRunLoopRef runner = CFRunLoopGetCurrent();
   
   
   
   
   
        CFMachPortRef mach = CGEventTapCreate(kCGHIDEventTap,kCGTailAppendEventTap , kCGEventTapOptionDefault, kCGEventMaskForAllEvents, myCGEventCallback, NULL);
   
   
        CFRunLoopSourceRef runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, mach, 0);
   
        CFRunLoopAddSource(runner, runLoopSource, kCFRunLoopCommonModes);
   
        CGEventTapEnable(mach, true);
   
   
        CFRunLoopRun();
   
        printf("end\n");
   
   
   
    }

But It reacts only for touchpad-events. Keyboard events seems to be ignored by my program. I have tried changing event masks but I does not work. Can you give some advice?

PS

Is that good start to handle events? I want to make full screen OpenGL game

with core graphics without libraries like SFML or SDL.

I am using CGDisplayCapture and CGL to create  OpeGL context.