NAME

       XkbNoteIndicatorChanges - Notes the changes in a changes structure

SYNOPSIS

       void  XkbNoteIndicatorChanges  (XkbIndicatorChangesPtr  old,  XkbIndicatorNotifyEvent  *new, unsigned int
              wanted);

ARGUMENTS

       - old  XkbIndicatorChanges structure to be updated

       - new  event from which changes are to be copied

       - wanted
              which changes are to be noted

DESCRIPTION

       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.

       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  indicators,  whether  they  have  changed or not, for both
       XkbIndicatorStateNotify and IndicatorMapNotify events.

       When your client application receives either a  XkbIndicatorStateNotify  event  or  XkbIndicatorMapNotify
       event, you can note the changes in a changes structure by calling XkbNoteIndicatorChanges.

       The  wanted  parameter  is  the  bitwise  inclusive  OR of XkbIndicatorMapMask and XkbIndicatorStateMask.
       XkbNoteIndicatorChanges copies any changes reported in new and  specified  in  wanted  into  the  changes
       record specified by old.

STRUCTURES

       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;

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

SEE ALSO

       XkbIndicatorMapMask(3), XkbIndicatorStateMask(3), XkbSelectEventDetails(3), XkbSelectEvents(3)

X Version 11                                      libX11 1.7.5                        XkbNoteIndicatorChanges(3)