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X11R7.4 - man page for xkbchangeindicators (x11r4 section 3)

XkbChangeIndicators(3)			  XKB FUNCTIONS 		   XkbChangeIndicators(3)

       XkbChangeIndicators  - Changes indicator maps or state without passing the entire keyboard

       Bool XkbChangeIndicators ( dpy, xkb, changes, state )
	     Display * dpy ;
	     XkbDescPtr  xkb ;
	     XkbIndicatorChangesPtr  changes ;
	     unsigned int  state ;

       - dpy  connection to the X server

       - xkb  keyboard description from which names are to be taken.

       - changes
	      indicators to be updated on the server

       - state
	      new state of indicators listed in changes->state_changes

       The XkbIndicatorChangesRec identifies small modifications to the indicator  map.   Use  it
       with  the  function XkbChangeIndicators to reduce the amount of traffic sent to the server
       (see STRUCTURES).

       The state_changes field is a mask that specifies the indicators that have  changed  state,
       and map_changes is a mask that specifies the indicators whose maps have changed.

       XkbChangeIndicators  copies  any  maps specified by changes from the keyboard description,
       xkb, to the server specified by dpy.  If any bits are set in the  state_changes	field  of
       changes,  XkbChangeIndicators also sets the state of those indicators to the values speci-
       fied in the state mask. A 1 bit in state turns the corresponding indicator  on,	a  0  bit
       turns it off.

       In  addition,  it  can  also  generate  XkbIndicatorStateNotify	and XkbIndicatorMapNotify

       Whenever an indicator changes state, the server sends  XkbIndicatorStateNotify  events  to
       all  interested	clients. Similarly, whenever an indicator's map changes, the server sends
       XkbIndicatorMapNotify events to all interested clients.

       To  receive  XkbIndicatorStateNotify   events,	use   XkbSelectEvents	with   both   the
       bits_to_change  and  values_for_bits parameters containing XkbIndicatorStateNotifyMask. To
       receive XkbIndicatorMapNotify events, use XkbSelectEvents with XkbIndicatorMapNotifyMask.

       To receive events for  only  specific  indicators,  use	XkbSelectEventDetails.	 Set  the
       event_type parameter to XkbIndicatorStateNotify or XkbIndicatorMapNotify, and set both the
       bits_to_change and values_for_bits detail parameters to a mask where  each  bit	specifies
       one  indicator,	turning  on  those bits that specify the indicators for which you want to
       receive events.

       xkb_type is either XkbIndicatorStateNotify or XkbIndicatorMapNotify, depending on  whether
       the event is a kbIndicatorStateNotify event or kbIndicatorMapNotify event.

       The  changed  parameter	is a mask that is the bitwise inclusive OR of the indicators that
       have changed. If the event is of type XkbIndicatorMapNotify, changed reports the maps that
       changed.  If  the event is of type XkbIndicatorStateNotify, changed reports the indicators
       that have changed state.  state is a mask that specifies the current state of all  indica-
       tors, whether they have changed or not, for both XkbIndicatorStateNotify and IndicatorMap-
       Notify events.

	    typedef struct _XkbIndicatorChanges {
		unsigned int	      state_changes;
		unsigned int	       map_changes;

       Both types of indicator events use the same structure:

	   typedef struct _XkbIndicatorNotify {
	       int	      type;	   /* Xkb extension base event code */
	       unsigned long  serial;	   /* X server serial number for event */
	       Bool	      send_event;  /* True => synthetically generated */
	       Display *      display;	   /* server connection where event generated */
	       Time	      time;	   /* server time when event generated */
	       int	      xkb_type;    /* specifies state or map notify */
	       int	      device;	   /* Xkb device ID, will not be XkbUseCoreKbd*/
	       unsigned int   changed;	   /* mask of indicators with new state or map */
	       unsigned int   state;	   /* current state of all indicators */
	   } XkbIndicatorNotifyEvent;

       BadAtom	      A name is neither a valid Atom or None

		      Invalid reply from server

       XkbIndicatorMapNotify(3), XkbIndicatorStateNotify(3)

X Version 11				   libX11 1.2.1 		   XkbChangeIndicators(3)

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