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XkbChangeIndicators(3)           XKB FUNCTIONS          XkbChangeIndicators(3)

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

       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  indi-
       cator  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 indi-
       cators whose maps have changed.

       XkbChangeIndicators copies any maps specified by changes from the  key-
       board  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 specified 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 XkbIndi-
       catorMapNotify events.

       Whenever an  indicator  changes  state,  the  server  sends  XkbIndica-
       torStateNotify 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  XkbSelectEventDe-
       tails.   Set  the  event_type  parameter  to XkbIndicatorStateNotify or
       XkbIndicatorMapNotify,  and  set  both  the  bits_to_change  and   val-
       ues_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  XkbIndicatorMap-
       Notify,  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
       indicators, whether they have  changed  or  not,  for  both  XkbIndica-
       torStateNotify and IndicatorMapNotify 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 1.1.5           XkbChangeIndicators(3)