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CentOS 7.0 - man page for xkbselectevents (centos section 3)

XkbSelectEvents(3)			  XKB FUNCTIONS 		       XkbSelectEvents(3)

       XkbSelectEvents	-   Selects and / or deselects for delivery of one or more Xkb events and
       has them delivered under all conditions

       Bool XkbSelectEvents (Display  *display,  unsigned  int	device_spec,  unsigned	long  int
	      bits_to_change, unsigned long int values_for_bits);

	      connection to the X server

	      device ID, or XkbUseCoreKbd

	      determines events to be selected / deselected

	      1=>select, 0->deselect; for events in bits_to_change

       Xkb  events  are  selected  using an event mask, much the same as normal core X events are
       selected. However, unlike selecting core X events, where you must  specify  the	selection
       status  (on or off) for all possible event types whenever you wish to change the selection
       criteria for any one event, Xkb allows you to restrict the specification to only the event
       types  you wish to change. This means that you do not need to remember the event selection
       values for all possible types each time you want to change one of them.

       Many Xkb event types are generated under several different circumstances.  When	selecting
       to  receive an Xkb event, you may specify either that you want it delivered under all cir-
       cumstances, or that you want it delivered only for a subset of the possible circumstances.

       You can also deselect an event type that was previously selected for, using the same gran-

       Xkb provides two functions to select and deselect delivery of Xkb events.  XkbSelectEvents
       allows you to select or deselect delivery of more than one Xkb event type at once.  Events
       selected  using XkbSelectEvents are delivered to your program under all circumstances that
       generate the events.  To restrict delivery of an event to a subset of the conditions under
       which  it  occurs,  use	XkbSelectEventDetails.	XkbSelectEventDetails  only allows you to
       change the selection conditions for a single event at a time, but it provides a	means  of
       fine-tuning the conditions under which the event is delivered.

       This  request  changes  the  Xkb  event	selection  mask  for  the  keyboard  specified by

       Each Xkb event that can be selected is represented by a bit in the bits_to_change and val-
       ues_for_bits  masks. Only the event selection bits specified by the bits_to_change parame-
       ter are affected; any unspecified bits are left unchanged. To turn on event selection  for
       an  event,  set	the  bit for the event in the bits_to_change parameter and set the corre-
       sponding bit in the values_for_bits parameter. To turn off event selection for  an  event,
       set the bit for the event in the bits_to_change parameter and do not set the corresponding
       bit in the values_for_bits parameter. The valid values for both of these parameters are an
       inclusive  bitwise  OR of the masks shown in Table 1. There is no interface to return your
       client's current event selection mask. Clients cannot set other clients'  event	selection

       The X server reports the events defined by Xkb to your client application only if you have
       requested them via a call to XkbSelectEvents or XkbSelectEventDetails.  Specify the  event
       types in which you are interested in a mask.

       Table  1  lists	the  event  mask constants that can be specified with the XkbSelectEvents
       request and the circumstances in which the mask should be specified.

			 Table 1 XkbSelectEvents Mask Constants
       Event Mask		      Value	 Notification Wanted
       XkbNewKeyboardNotifyMask       (1L<<0)	 Keyboard geometry change
       XkbMapNotifyMask 	      (1L<<1)	 Keyboard mapping change
       XkbStateNotifyMask	      (1L<<2)	 Keyboard state change
       XkbControlsNotifyMask	      (1L<<3)	 Keyboard control change
       XkbIndicatorStateNotifyMask    (1L<<4)	 Keyboard indicator state change
       XkbIndicatorMapNotifyMask      (1L<<5)	 Keyboard indicator map change
       XkbNamesNotifyMask	      (1L<<6)	 Keyboard name change
       XkbCompatMapNotifyMask	      (1L<<7)	 Keyboard compat map change
       XkbBellNotifyMask	      (1L<<8)	 Bell
       XkbActionMessageMask	      (1L<<9)	 Action message
       XkbAccessXNotifyMask	      (1L<<10)	 AccessX features
       XkbExtensionDeviceNotifyMask   (1L<<11)	 Extension device
       XkbAllEventsMask 	      (0xFFF)	 All Xkb events

       If a bit is not set in the bits_to_change parameter, but the corresponding bit is  set  in
       the  values_for_bits  parameter, a BadMatch protocol error results. If an undefined bit is
       set in either the bits_to_change or the values_for_bits	parameter,  a  BadValue  protocol
       error results.

       All event selection bits are initially zero for clients using the Xkb extension.  Once you
       set some bits, they remain set for your client until you clear them via	another  call  to

       XkbSelectEvents	returns  False	if  the Xkb extension has not been initilialized and True

       True	      The XkbSelectEvents function returns True if the	Xkb  extension	has  been

       False	      The  XkbSelectEvents  function  returns  False if the Xkb extension has not
		      been initilialized.

       XkbSelectEventDetails(3), XkbUseCoreKbd(3)

X Version 11				   libX11 1.6.0 		       XkbSelectEvents(3)

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