Goal is to capture the XI2 event for multiple cursor( for different mouse/keyboard)
Here's some relevant code. (I've check the has_xi2 for my display, and set the event mask in the MainWindow's constructor.
Qt Code: 
  1. bool MainWindow::x11Event(XEvent * e)
  2. {
  3. 	XEvent ev = *e;
  4. 	XGenericEventCookie *cookie = &ev.xcookie; //&e->xcookie;
  5. 	if(cookie->type != GenericEvent || cookie->extension != xi_opcode || !XGetEventData(dpy, cookie) ){
  6. 		printf("No GenericEvent  Type is found in X11Event,   return   ******************* \n");
  7. 		return false;
  8. 	}
  9. 	printf("EVENT TYPE %d \n", cookie->evtype);
  10. 	switch(cookie->evtype){
  11. 	case XI_RawMotion:
  12. 		print_rawmotion((XIRawEvent *)cookie->data);
  13. 		break;
  14. 	case XI_Enter:
  15. 	case XI_Leave:
  16. 		print_enterleaveevent((XIEnterEvent *)cookie->data);
  17. 		break;
  18. 	default:
  19. 		print_deviceEvent((XIDeviceEvent *)cookie->data);
  20. 		break;
  21. 	}
  22. 	return false;
  23. }
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If needed, I can send more code to your email.

BTW, what do you mean that the event is native. would you please show me the document you've seen?

Thanks