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

XkbGetIndicatorChanges(3)		  XKB FUNCTIONS 		XkbGetIndicatorChanges(3)

       XkbGetIndicatorChanges  - Updates a local copy of the keyboard description with the actual
       values of one or more calls to XkbNoteIndicatorChanges

       Status XkbGetIndicatorChanges ( dpy, xkb, changes, state )
	     Display *dpy;
	     XkbDescPtr xkb;
	     XkbIndicatorChangesPtr changes;
	     unsigned int state;

       - dpy  connection to the X server

       - xkb  keyboard description to hold the new values

       - changes
	      indicator maps/state to be obtained from the server

       - state
	      backfilled with the state of the indicators

       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.

       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.

       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.

       When your client application receives either a XkbIndicatorStateNotify event or XkbIndica-
       torMapNotify  event,  you  can  note  the  changes  in a changes structure by calling Xkb-

       XkbGetIndicatorChanges examines the changes parameter, pulls over the  necessary  informa-
       tion  from  the	server,  and copies the results into the xkb keyboard description. If any
       bits are set in the state_changes field of changes, XkbGetIndicatorChanges also places the
       state of those indicators in state.  If the indicators field of xkb is NULL, XkbGetIndica-
       torChanges allocates and initializes it. To free the indicators field, use  XkbFreeIndica-

       BadAlloc       Unable to allocate storage

		      Invalid reply from server

       BadMatch       A  compatible version of Xkb was not available in the server or an argument
		      has correct type and range, but is otherwise invalid

       XkbFreeIndicators(3),   XkbGetIndicatorChanges(3),   XkbNoteIndicatorChanges(3),    XkbSe-
       lectEvents(3), XkbSelectEventDetail(3)

X Version 11				   libX11 1.2.1 		XkbGetIndicatorChanges(3)

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